diff --git a/.gitignore b/.gitignore
index f4c0b09..e213b27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,6 +34,7 @@
 *.gcno
 modules.builtin
 Module.symvers
+*.dwo
 
 #
 # Top-level generic files
diff --git a/Documentation/ABI/testing/sysfs-bus-rbd b/Documentation/ABI/testing/sysfs-bus-rbd
index 501adc2..2ddd680 100644
--- a/Documentation/ABI/testing/sysfs-bus-rbd
+++ b/Documentation/ABI/testing/sysfs-bus-rbd
@@ -94,5 +94,5 @@
 
 parent
 
-	Information identifying the pool, image, and snapshot id for
-	the parent image in a layered rbd image (format 2 only).
+	Information identifying the chain of parent images in a layered rbd
+	image.  Entries are separated by empty lines.
diff --git a/Documentation/ABI/testing/sysfs-fs-xfs b/Documentation/ABI/testing/sysfs-fs-xfs
new file mode 100644
index 0000000..ea0cc8c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-fs-xfs
@@ -0,0 +1,39 @@
+What:		/sys/fs/xfs/<disk>/log/log_head_lsn
+Date:		July 2014
+KernelVersion:	3.17
+Contact:	xfs@oss.sgi.com
+Description:
+		The log sequence number (LSN) of the current head of the
+		log. The LSN is exported in "cycle:basic block" format.
+Users:		xfstests
+
+What:		/sys/fs/xfs/<disk>/log/log_tail_lsn
+Date:		July 2014
+KernelVersion:	3.17
+Contact:	xfs@oss.sgi.com
+Description:
+		The log sequence number (LSN) of the current tail of the
+		log. The LSN is exported in "cycle:basic block" format.
+
+What:		/sys/fs/xfs/<disk>/log/reserve_grant_head
+Date:		July 2014
+KernelVersion:	3.17
+Contact:	xfs@oss.sgi.com
+Description:
+		The current state of the log reserve grant head. It
+		represents the total log reservation of all currently
+		outstanding transactions. The grant head is exported in
+		"cycle:bytes" format.
+Users:		xfstests
+
+What:		/sys/fs/xfs/<disk>/log/write_grant_head
+Date:		July 2014
+KernelVersion:	3.17
+Contact:	xfs@oss.sgi.com
+Description:
+		The current state of the log write grant head. It
+		represents the total log reservation of all currently
+		oustanding transactions, including regrants due to
+		rolling transactions. The grant head is exported in
+		"cycle:bytes" format.
+Users:		xfstests
diff --git a/Documentation/device-mapper/switch.txt b/Documentation/device-mapper/switch.txt
index 2fa7493..8897d04 100644
--- a/Documentation/device-mapper/switch.txt
+++ b/Documentation/device-mapper/switch.txt
@@ -106,6 +106,11 @@
     The path number in the range 0 ... (<num_paths> - 1).
     Expressed in hexadecimal (WITHOUT any prefix like 0x).
 
+R<n>,<m>
+    This parameter allows repetitive patterns to be loaded quickly. <n> and <m>
+    are hexadecimal numbers. The last <n> mappings are repeated in the next <m>
+    slots.
+
 Status
 ======
 
@@ -124,3 +129,10 @@
 Set mappings for the first 7 entries to point to devices switch0, switch1,
 switch2, switch0, switch1, switch2, switch1:
     dmsetup message switch 0 set_region_mappings 0:0 :1 :2 :0 :1 :2 :1
+
+Set repetitive mapping. This command:
+    dmsetup message switch 0 set_region_mappings 1000:1 :2 R2,10
+is equivalent to:
+    dmsetup message switch 0 set_region_mappings 1000:1 :2 :1 :2 :1 :2 :1 :2 \
+	:1 :2 :1 :2 :1 :2 :1 :2 :1 :2
+
diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
index e577196..4659fd9 100644
--- a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
+++ b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
@@ -47,6 +47,7 @@
 	20	ASRC
 	21	ESAI
 	22	SSI Dual FIFO	(needs firmware ver >= 2)
+	23	Shared ASRC
 
 The third cell specifies the transfer priority as below.
 
diff --git a/Documentation/devicetree/bindings/dma/mpc512x-dma.txt b/Documentation/devicetree/bindings/dma/mpc512x-dma.txt
new file mode 100644
index 0000000..a6511df
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/mpc512x-dma.txt
@@ -0,0 +1,29 @@
+* Freescale MPC512x and MPC8308 DMA Controller
+
+The DMA controller in Freescale MPC512x and MPC8308 SoCs can move
+blocks of memory contents between memory and peripherals or
+from memory to memory.
+
+Refer to "Generic DMA Controller and DMA request bindings" in
+the dma/dma.txt file for a more detailed description of binding.
+
+Required properties:
+- compatible: should be "fsl,mpc5121-dma" or "fsl,mpc8308-dma";
+- reg: should contain the DMA controller registers location and length;
+- interrupt for the DMA controller: syntax of interrupt client node
+	is described in interrupt-controller/interrupts.txt file.
+- #dma-cells: the length of the DMA specifier, must be <1>.
+	Each channel of this DMA controller has a peripheral request line,
+	the assignment is fixed in hardware. This one cell
+	in dmas property of a client device represents the channel number.
+
+Example:
+
+	dma0: dma@14000 {
+		compatible = "fsl,mpc5121-dma";
+		reg = <0x14000 0x1800>;
+		interrupts = <65 0x8>;
+		#dma-cells = <1>;
+	};
+
+DMA clients must use the format described in dma/dma.txt file.
diff --git a/Documentation/devicetree/bindings/dma/nbpfaxi.txt b/Documentation/devicetree/bindings/dma/nbpfaxi.txt
new file mode 100644
index 0000000..d5e2522
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/nbpfaxi.txt
@@ -0,0 +1,61 @@
+* Renesas "Type-AXI" NBPFAXI* DMA controllers
+
+* DMA controller
+
+Required properties
+
+- compatible:	must be one of
+		"renesas,nbpfaxi64dmac1b4"
+		"renesas,nbpfaxi64dmac1b8"
+		"renesas,nbpfaxi64dmac1b16"
+		"renesas,nbpfaxi64dmac4b4"
+		"renesas,nbpfaxi64dmac4b8"
+		"renesas,nbpfaxi64dmac4b16"
+		"renesas,nbpfaxi64dmac8b4"
+		"renesas,nbpfaxi64dmac8b8"
+		"renesas,nbpfaxi64dmac8b16"
+- #dma-cells:	must be 2: the first integer is a terminal number, to which this
+		slave is connected, the second one is flags. Flags is a bitmask
+		with the following bits defined:
+
+#define NBPF_SLAVE_RQ_HIGH	1
+#define NBPF_SLAVE_RQ_LOW	2
+#define NBPF_SLAVE_RQ_LEVEL	4
+
+Optional properties:
+
+You can use dma-channels and dma-requests as described in dma.txt, although they
+won't be used, this information is derived from the compatibility string.
+
+Example:
+
+	dma: dma-controller@48000000 {
+		compatible = "renesas,nbpfaxi64dmac8b4";
+		reg = <0x48000000 0x400>;
+		interrupts = <0 12 0x4
+			      0 13 0x4
+			      0 14 0x4
+			      0 15 0x4
+			      0 16 0x4
+			      0 17 0x4
+			      0 18 0x4
+			      0 19 0x4>;
+		#dma-cells = <2>;
+		dma-channels = <8>;
+		dma-requests = <8>;
+	};
+
+* DMA client
+
+Required properties:
+
+dmas and dma-names are required, as described in dma.txt.
+
+Example:
+
+#include <dt-bindings/dma/nbpfaxi.h>
+
+...
+		dmas = <&dma 0 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)
+			&dma 1 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)>;
+		dma-names = "rx", "tx";
diff --git a/Documentation/devicetree/bindings/dma/rcar-audmapp.txt b/Documentation/devicetree/bindings/dma/rcar-audmapp.txt
new file mode 100644
index 0000000..9f1d750
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/rcar-audmapp.txt
@@ -0,0 +1,29 @@
+* R-Car Audio DMAC peri peri Device Tree bindings
+
+Required properties:
+- compatible:	should be "renesas,rcar-audmapp"
+- #dma-cells:	should be <1>, see "dmas" property below
+
+Example:
+	audmapp: audio-dma-pp@0xec740000 {
+		compatible = "renesas,rcar-audmapp";
+		#dma-cells = <1>;
+
+		reg = <0 0xec740000 0 0x200>;
+	};
+
+
+* DMA client
+
+Required properties:
+- dmas:		a list of <[DMA multiplexer phandle] [SRS/DRS value]> pairs,
+		where SRS/DRS values are fixed handles, specified in the SoC
+		manual as the value that would be written into the PDMACHCR.
+- dma-names:	a list of DMA channel names, one per "dmas" entry
+
+Example:
+
+	dmas = <&audmapp 0x2d00
+		&audmapp 0x3700>;
+	dma-names =  "src0_ssiu0",
+		     "dvc0_ssiu0";
diff --git a/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
new file mode 100644
index 0000000..df0f48b
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
@@ -0,0 +1,98 @@
+* Renesas R-Car DMA Controller Device Tree bindings
+
+Renesas R-Car Generation 2 SoCs have have multiple multi-channel DMA
+controller instances named DMAC capable of serving multiple clients. Channels
+can be dedicated to specific clients or shared between a large number of
+clients.
+
+DMA clients are connected to the DMAC ports referenced by an 8-bit identifier
+called MID/RID.
+
+Each DMA client is connected to one dedicated port of the DMAC, identified by
+an 8-bit port number called the MID/RID. A DMA controller can thus serve up to
+256 clients in total. When the number of hardware channels is lower than the
+number of clients to be served, channels must be shared between multiple DMA
+clients. The association of DMA clients to DMAC channels is fully dynamic and
+not described in these device tree bindings.
+
+Required Properties:
+
+- compatible: must contain "renesas,rcar-dmac"
+
+- reg: base address and length of the registers block for the DMAC
+
+- interrupts: interrupt specifiers for the DMAC, one for each entry in
+  interrupt-names.
+- interrupt-names: one entry per channel, named "ch%u", where %u is the
+  channel number ranging from zero to the number of channels minus one.
+
+- clock-names: "fck" for the functional clock
+- clocks: a list of phandle + clock-specifier pairs, one for each entry
+  in clock-names.
+- clock-names: must contain "fck" for the functional clock.
+
+- #dma-cells: must be <1>, the cell specifies the MID/RID of the DMAC port
+  connected to the DMA client
+- dma-channels: number of DMA channels
+
+Example: R8A7790 (R-Car H2) SYS-DMACs
+
+	dmac0: dma-controller@e6700000 {
+		compatible = "renesas,rcar-dmac";
+		reg = <0 0xe6700000 0 0x20000>;
+		interrupts = <0 197 IRQ_TYPE_LEVEL_HIGH
+			      0 200 IRQ_TYPE_LEVEL_HIGH
+			      0 201 IRQ_TYPE_LEVEL_HIGH
+			      0 202 IRQ_TYPE_LEVEL_HIGH
+			      0 203 IRQ_TYPE_LEVEL_HIGH
+			      0 204 IRQ_TYPE_LEVEL_HIGH
+			      0 205 IRQ_TYPE_LEVEL_HIGH
+			      0 206 IRQ_TYPE_LEVEL_HIGH
+			      0 207 IRQ_TYPE_LEVEL_HIGH
+			      0 208 IRQ_TYPE_LEVEL_HIGH
+			      0 209 IRQ_TYPE_LEVEL_HIGH
+			      0 210 IRQ_TYPE_LEVEL_HIGH
+			      0 211 IRQ_TYPE_LEVEL_HIGH
+			      0 212 IRQ_TYPE_LEVEL_HIGH
+			      0 213 IRQ_TYPE_LEVEL_HIGH
+			      0 214 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "error",
+				"ch0", "ch1", "ch2", "ch3",
+				"ch4", "ch5", "ch6", "ch7",
+				"ch8", "ch9", "ch10", "ch11",
+				"ch12", "ch13", "ch14";
+		clocks = <&mstp2_clks R8A7790_CLK_SYS_DMAC0>;
+		clock-names = "fck";
+		#dma-cells = <1>;
+		dma-channels = <15>;
+	};
+
+	dmac1: dma-controller@e6720000 {
+		compatible = "renesas,rcar-dmac";
+		reg = <0 0xe6720000 0 0x20000>;
+		interrupts = <0 220 IRQ_TYPE_LEVEL_HIGH
+			      0 216 IRQ_TYPE_LEVEL_HIGH
+			      0 217 IRQ_TYPE_LEVEL_HIGH
+			      0 218 IRQ_TYPE_LEVEL_HIGH
+			      0 219 IRQ_TYPE_LEVEL_HIGH
+			      0 308 IRQ_TYPE_LEVEL_HIGH
+			      0 309 IRQ_TYPE_LEVEL_HIGH
+			      0 310 IRQ_TYPE_LEVEL_HIGH
+			      0 311 IRQ_TYPE_LEVEL_HIGH
+			      0 312 IRQ_TYPE_LEVEL_HIGH
+			      0 313 IRQ_TYPE_LEVEL_HIGH
+			      0 314 IRQ_TYPE_LEVEL_HIGH
+			      0 315 IRQ_TYPE_LEVEL_HIGH
+			      0 316 IRQ_TYPE_LEVEL_HIGH
+			      0 317 IRQ_TYPE_LEVEL_HIGH
+			      0 318 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "error",
+				"ch0", "ch1", "ch2", "ch3",
+				"ch4", "ch5", "ch6", "ch7",
+				"ch8", "ch9", "ch10", "ch11",
+				"ch12", "ch13", "ch14";
+		clocks = <&mstp2_clks R8A7790_CLK_SYS_DMAC1>;
+		clock-names = "fck";
+		#dma-cells = <1>;
+		dma-channels = <15>;
+	};
diff --git a/Documentation/devicetree/bindings/dma/ste-dma40.txt b/Documentation/devicetree/bindings/dma/ste-dma40.txt
index 1f5729f..95800ab 100644
--- a/Documentation/devicetree/bindings/dma/ste-dma40.txt
+++ b/Documentation/devicetree/bindings/dma/ste-dma40.txt
@@ -35,9 +35,11 @@
 
 Each dmas request consists of 4 cells:
   1. A phandle pointing to the DMA controller
-  2. Device Type
+  2. Device signal number, the signal line for single and burst requests
+     connected from the device to the DMA40 engine
   3. The DMA request line number (only when 'use fixed channel' is set)
-  4. A 32bit mask specifying; mode, direction and endianness [NB: This list will grow]
+  4. A 32bit mask specifying; mode, direction and endianness
+     [NB: This list will grow]
         0x00000001: Mode:
                 Logical channel when unset
                 Physical channel when set
@@ -54,6 +56,74 @@
                 Normal priority when unset
                 High priority when set
 
+Existing signal numbers for the DB8500 ASIC. Unless specified, the signals are
+bidirectional, i.e. the same for RX and TX operations:
+
+0:  SPI controller 0
+1:  SD/MMC controller 0 (unused)
+2:  SD/MMC controller 1 (unused)
+3:  SD/MMC controller 2 (unused)
+4:  I2C port 1
+5:  I2C port 3
+6:  I2C port 2
+7:  I2C port 4
+8:  Synchronous Serial Port SSP0
+9:  Synchronous Serial Port SSP1
+10: Multi-Channel Display Engine MCDE RX
+11: UART port 2
+12: UART port 1
+13: UART port 0
+14: Multirate Serial Port MSP2
+15: I2C port 0
+16: USB OTG in/out endpoints 7 & 15
+17: USB OTG in/out endpoints 6 & 14
+18: USB OTG in/out endpoints 5 & 13
+19: USB OTG in/out endpoints 4 & 12
+20: SLIMbus or HSI channel 0
+21: SLIMbus or HSI channel 1
+22: SLIMbus or HSI channel 2
+23: SLIMbus or HSI channel 3
+24: Multimedia DSP SXA0
+25: Multimedia DSP SXA1
+26: Multimedia DSP SXA2
+27: Multimedia DSP SXA3
+28: SD/MM controller 2
+29: SD/MM controller 0
+30: MSP port 1 on DB8500 v1, MSP port 3 on DB8500 v2
+31: MSP port 0 or SLIMbus channel 0
+32: SD/MM controller 1
+33: SPI controller 2
+34: i2c3 RX2 TX2
+35: SPI controller 1
+36: USB OTG in/out endpoints 3 & 11
+37: USB OTG in/out endpoints 2 & 10
+38: USB OTG in/out endpoints 1 & 9
+39: USB OTG in/out endpoints 8
+40: SPI controller 3
+41: SD/MM controller 3
+42: SD/MM controller 4
+43: SD/MM controller 5
+44: Multimedia DSP SXA4
+45: Multimedia DSP SXA5
+46: SLIMbus channel 8 or Multimedia DSP SXA6
+47: SLIMbus channel 9 or Multimedia DSP SXA7
+48: Crypto Accelerator 1
+49: Crypto Accelerator 1 TX or Hash Accelerator 1 TX
+50: Hash Accelerator 1 TX
+51: memcpy TX (to be used by the DMA driver for memcpy operations)
+52: SLIMbus or HSI channel 4
+53: SLIMbus or HSI channel 5
+54: SLIMbus or HSI channel 6
+55: SLIMbus or HSI channel 7
+56: memcpy (to be used by the DMA driver for memcpy operations)
+57: memcpy (to be used by the DMA driver for memcpy operations)
+58: memcpy (to be used by the DMA driver for memcpy operations)
+59: memcpy (to be used by the DMA driver for memcpy operations)
+60: memcpy (to be used by the DMA driver for memcpy operations)
+61: Crypto Accelerator 0
+62: Crypto Accelerator 0 TX or Hash Accelerator 0 TX
+63: Hash Accelerator 0 TX
+
 Example:
 
 	uart@80120000 {
diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
new file mode 100644
index 0000000..3e145c1
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
@@ -0,0 +1,45 @@
+Allwinner A31 DMA Controller
+
+This driver follows the generic DMA bindings defined in dma.txt.
+
+Required properties:
+
+- compatible:	Must be "allwinner,sun6i-a31-dma"
+- reg:		Should contain the registers base address and length
+- interrupts:	Should contain a reference to the interrupt used by this device
+- clocks:	Should contain a reference to the parent AHB clock
+- resets:	Should contain a reference to the reset controller asserting
+		this device in reset
+- #dma-cells :	Should be 1, a single cell holding a line request number
+
+Example:
+	dma: dma-controller@01c02000 {
+		compatible = "allwinner,sun6i-a31-dma";
+		reg = <0x01c02000 0x1000>;
+		interrupts = <0 50 4>;
+		clocks = <&ahb1_gates 6>;
+		resets = <&ahb1_rst 6>;
+		#dma-cells = <1>;
+	};
+
+Clients:
+
+DMA clients connected to the A31 DMA controller must use the format
+described in the dma.txt file, using a two-cell specifier for each
+channel: a phandle plus one integer cells.
+The two cells in order are:
+
+1. A phandle pointing to the DMA controller.
+2. The port ID as specified in the datasheet
+
+Example:
+spi2: spi@01c6a000 {
+	compatible = "allwinner,sun6i-a31-spi";
+	reg = <0x01c6a000 0x1000>;
+	interrupts = <0 67 4>;
+	clocks = <&ahb1_gates 22>, <&spi2_clk>;
+	clock-names = "ahb", "mod";
+	dmas = <&dma 25>, <&dma 25>;
+	dma-names = "rx", "tx";
+	resets = <&ahb1_rst 22>;
+};
diff --git a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
index 532b1d4..6cd3525 100644
--- a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
+++ b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
@@ -46,13 +46,14 @@
       - if CIU clock divider value is 0 (that is divide by 1), both tx and rx
         phase shift clocks should be 0.
 
-Required properties for a slot:
+Required properties for a slot (Deprecated - Recommend to use one slot per host):
 
 * gpios: specifies a list of gpios used for command, clock and data bus. The
   first gpio is the command line and the second gpio is the clock line. The
   rest of the gpios (depending on the bus-width property) are the data lines in
   no particular order. The format of the gpio specifier depends on the gpio
   controller.
+(Deprecated - Refer to Documentation/devicetree/binding/pinctrl/samsung-pinctrl.txt)
 
 Example:
 
@@ -69,21 +70,13 @@
 
 	dwmmc0@12200000 {
 		num-slots = <1>;
-		supports-highspeed;
+		cap-mmc-highspeed;
+		cap-sd-highspeed;
 		broken-cd;
 		fifo-depth = <0x80>;
 		card-detect-delay = <200>;
 		samsung,dw-mshc-ciu-div = <3>;
 		samsung,dw-mshc-sdr-timing = <2 3>;
 		samsung,dw-mshc-ddr-timing = <1 2>;
-
-		slot@0 {
-			reg = <0>;
-			bus-width = <8>;
-			gpios = <&gpc0 0 2 0 3>, <&gpc0 1 2 0 3>,
-				<&gpc1 0 2 3 3>, <&gpc1 1 2 3 3>,
-				<&gpc1 2 2 3 3>, <&gpc1 3 2 3 3>,
-				<&gpc0 3 2 3 3>, <&gpc0 4 2 3 3>,
-				<&gpc0 5 2 3 3>, <&gpc0 6 2 3 3>;
-		};
+		bus-width = <8>;
 	};
diff --git a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
index e5bc49f..3b35449 100644
--- a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
+++ b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
@@ -34,13 +34,11 @@
 		num-slots = <1>;
 		vmmc-supply = <&ldo12>;
 		fifo-depth = <0x100>;
-		supports-highspeed;
 		pinctrl-names = "default";
 		pinctrl-0 = <&sd_pmx_pins &sd_cfg_func1 &sd_cfg_func2>;
-		slot@0 {
-			reg = <0>;
-			bus-width = <4>;
-			disable-wp;
-			cd-gpios = <&gpio10 3 0>;
-		};
+		bus-width = <4>;
+		disable-wp;
+		cd-gpios = <&gpio10 3 0>;
+		cap-mmc-highspeed;
+		cap-sd-highspeed;
 	};
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 3c18001..431716e 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -34,8 +34,8 @@
 - cap-power-off-card: powering off the card is safe
 - cap-sdio-irq: enable SDIO IRQ signalling on this interface
 - full-pwr-cycle: full power cycle of the card is supported
-- mmc-highspeed-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported
-- mmc-highspeed-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported
+- mmc-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported
+- mmc-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported
 - mmc-hs200-1_8v: eMMC HS200 mode(1.8V I/O) is supported
 - mmc-hs200-1_2v: eMMC HS200 mode(1.2V I/O) is supported
 - mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported
diff --git a/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt b/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt
new file mode 100644
index 0000000..299081f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/renesas,mmcif.txt
@@ -0,0 +1,32 @@
+* Renesas Multi Media Card Interface (MMCIF) Controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the MMCIF device.
+
+
+Required properties:
+
+- compatible: must contain one of the following
+	- "renesas,mmcif-r8a7740" for the MMCIF found in r8a7740 SoCs
+	- "renesas,mmcif-r8a7790" for the MMCIF found in r8a7790 SoCs
+	- "renesas,mmcif-r8a7791" for the MMCIF found in r8a7791 SoCs
+	- "renesas,sh-mmcif" for the generic MMCIF
+
+- clocks: reference to the functional clock
+
+- dmas: reference to the DMA channels, one per channel name listed in the
+  dma-names property.
+- dma-names: must contain "tx" for the transmit DMA channel and "rx" for the
+  receive DMA channel.
+
+
+Example: R8A7790 (R-Car H2) MMCIF0
+
+	mmcif0: mmc@ee200000 {
+		compatible = "renesas,mmcif-r8a7790", "renesas,sh-mmcif";
+		reg = <0 0xee200000 0 0x80>;
+		interrupts = <0 169 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp3_clks R8A7790_CLK_MMCIF0>;
+		dmas = <&dmac0 0xd1>, <&dmac0 0xd2>;
+		dma-names = "tx", "rx";
+	};
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 81b33b5..485483a 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -27,8 +27,8 @@
 		bus-width = <8>;
 		non-removable;
 
-		vmmc = <&pm8941_l20>;
-		vqmmc = <&pm8941_s3>;
+		vmmc-supply = <&pm8941_l20>;
+		vqmmc-supply = <&pm8941_s3>;
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&sdc1_clk &sdc1_cmd &sdc1_data>;
@@ -44,8 +44,8 @@
 		bus-width = <4>;
 		cd-gpios = <&msmgpio 62 0x1>;
 
-		vmmc = <&pm8941_l21>;
-		vqmmc = <&pm8941_l13>;
+		vmmc-supply = <&pm8941_l21>;
+		vqmmc-supply = <&pm8941_l13>;
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&sdc2_clk &sdc2_cmd &sdc2_data>;
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-st.txt b/Documentation/devicetree/bindings/mmc/sdhci-st.txt
new file mode 100644
index 0000000..7527db4
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci-st.txt
@@ -0,0 +1,33 @@
+* STMicroelectronics sdhci-st MMC/SD controller
+
+This file documents the differences between the core properties in
+Documentation/devicetree/bindings/mmc/mmc.txt and the properties
+used by the sdhci-st driver.
+
+Required properties:
+- compatible :  Must be "st,sdhci"
+- clock-names : Should be "mmc"
+                See: Documentation/devicetree/bindings/resource-names.txt
+- clocks :      Phandle of the clock used by the sdhci controler
+                See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Optional properties:
+- non-removable: non-removable slot
+                 See: Documentation/devicetree/bindings/mmc/mmc.txt
+- bus-width: Number of data lines
+                 See: Documentation/devicetree/bindings/mmc/mmc.txt
+
+Example:
+
+mmc0: sdhci@fe81e000 {
+	compatible	= "st,sdhci";
+	status		= "disabled";
+	reg		= <0xfe81e000 0x1000>;
+	interrupts	= <GIC_SPI 127 IRQ_TYPE_NONE>;
+	interrupt-names	= "mmcirq";
+	pinctrl-names	= "default";
+	pinctrl-0	= <&pinctrl_mmc0>;
+	clock-names	= "mmc";
+	clocks		= <&clk_s_a1_ls 1>;
+	bus-width       = <8>
+};
diff --git a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
index 2d4a725..346c609 100644
--- a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
+++ b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
@@ -67,7 +67,8 @@
 * card-detect-delay: Delay in milli-seconds before detecting card after card
   insert event. The default value is 0.
 
-* supports-highspeed: Enables support for high speed cards (up to 50MHz)
+* supports-highspeed (DEPRECATED): Enables support for high speed cards (up to 50MHz)
+			   (use "cap-mmc-highspeed" or "cap-sd-highspeed" instead)
 
 * broken-cd: as documented in mmc core bindings.
 
@@ -98,14 +99,11 @@
 		clock-frequency = <400000000>;
 		clock-freq-min-max = <400000 200000000>;
 		num-slots = <1>;
-		supports-highspeed;
 		broken-cd;
 		fifo-depth = <0x80>;
 		card-detect-delay = <200>;
 		vmmc-supply = <&buck8>;
-
-		slot@0 {
-			reg = <0>;
-			bus-width = <8>;
-		};
+		bus-width = <8>;
+		cap-mmc-highspeed;
+		cap-sd-highspeed;
 	};
diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
index ce80561..76bf087 100644
--- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
+++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
@@ -12,6 +12,7 @@
  Should be "ti,omap3-hsmmc", for OMAP3 controllers
  Should be "ti,omap3-pre-es3-hsmmc" for OMAP3 controllers pre ES3.0
  Should be "ti,omap4-hsmmc", for OMAP4 controllers
+ Should be "ti,am33xx-hsmmc", for AM335x controllers
 - ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
 
 Optional properties:
@@ -56,3 +57,56 @@
 			&edma 25>;
 		dma-names = "tx", "rx";
 	};
+
+[workaround for missing swakeup on am33xx]
+
+This SOC is missing the swakeup line, it will not detect SDIO irq
+while in suspend.
+
+                             ------
+                             | PRCM |
+                              ------
+                               ^ |
+                       swakeup | | fclk
+                               | v
+       ------                -------               -----
+      | card | -- CIRQ -->  | hsmmc | -- IRQ -->  | CPU |
+       ------                -------               -----
+
+In suspend the fclk is off and the module is disfunctional. Even register reads
+will fail. A small logic in the host will request fclk restore, when an
+external event is detected. Once the clock is restored, the host detects the
+event normally. Since am33xx doesn't have this line it never wakes from
+suspend.
+
+The workaround is to reconfigure the dat1 line as a GPIO upon suspend. To make
+this work, we need to set the named pinctrl states "default" and "idle".
+Prepare idle to remux dat1 as a gpio, and default to remux it back as sdio
+dat1. The MMC driver will then toggle between idle and default state during
+runtime.
+
+In summary:
+1. select matching 'compatible' section, see example below.
+2. specify pinctrl states "default" and "idle", "sleep" is optional.
+3. specify the gpio irq used for detecting sdio irq in suspend
+
+If configuration is incomplete, a warning message is emitted "falling back to
+polling". Also check the "sdio irq mode" in /sys/kernel/debug/mmc0/regs. Mind
+not every application needs SDIO irq, e.g. MMC cards.
+
+	mmc1: mmc@48060100 {
+		compatible = "ti,am33xx-hsmmc";
+		...
+		pinctrl-names = "default", "idle", "sleep"
+		pinctrl-0 = <&mmc1_pins>;
+		pinctrl-1 = <&mmc1_idle>;
+		pinctrl-2 = <&mmc1_sleep>;
+		...
+		interrupts-extended = <&intc 64 &gpio2 28 0>;
+	};
+
+	mmc1_idle : pinmux_cirq_pin {
+		pinctrl-single,pins = <
+		        0x0f8 0x3f      /* GPIO2_28 */
+		>;
+	};
diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
index 6a2a116..fa0f327 100644
--- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
@@ -18,6 +18,7 @@
 		"renesas,sdhi-r8a7778" - SDHI IP on R8A7778 SoC
 		"renesas,sdhi-r8a7779" - SDHI IP on R8A7779 SoC
 		"renesas,sdhi-r8a7790" - SDHI IP on R8A7790 SoC
+		"renesas,sdhi-r8a7791" - SDHI IP on R8A7791 SoC
 
 Optional properties:
 - toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
diff --git a/Documentation/devicetree/bindings/net/apm-xgene-enet.txt b/Documentation/devicetree/bindings/net/apm-xgene-enet.txt
new file mode 100644
index 0000000..ebcad25
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/apm-xgene-enet.txt
@@ -0,0 +1,66 @@
+APM X-Gene SoC Ethernet nodes
+
+Ethernet nodes are defined to describe on-chip ethernet interfaces in
+APM X-Gene SoC.
+
+Required properties:
+- compatible: Should be "apm,xgene-enet"
+- reg: Address and length of the register set for the device. It contains the
+  information of registers in the same order as described by reg-names
+- reg-names: Should contain the register set names
+  - "enet_csr": Ethernet control and status register address space
+  - "ring_csr": Descriptor ring control and status register address space
+  - "ring_cmd": Descriptor ring command register address space
+- interrupts: Ethernet main interrupt
+- clocks: Reference to the clock entry.
+- local-mac-address: MAC address assigned to this device
+- phy-connection-type: Interface type between ethernet device and PHY device
+- phy-handle: Reference to a PHY node connected to this device
+
+- mdio: Device tree subnode with the following required properties:
+  - compatible: Must be "apm,xgene-mdio".
+  - #address-cells: Must be <1>.
+  - #size-cells: Must be <0>.
+
+  For the phy on the mdio bus, there must be a node with the following fields:
+  - compatible: PHY identifier.  Please refer ./phy.txt for the format.
+  - reg: The ID number for the phy.
+
+Optional properties:
+- status: Should be "ok" or "disabled" for enabled/disabled. Default is "ok".
+
+Example:
+	menetclk: menetclk {
+		compatible = "apm,xgene-device-clock";
+		clock-output-names = "menetclk";
+		status = "ok";
+	};
+
+	menet: ethernet@17020000 {
+		compatible = "apm,xgene-enet";
+		status = "disabled";
+		reg = <0x0 0x17020000 0x0 0xd100>,
+		      <0x0 0X17030000 0x0 0X400>,
+		      <0x0 0X10000000 0x0 0X200>;
+		reg-names = "enet_csr", "ring_csr", "ring_cmd";
+		interrupts = <0x0 0x3c 0x4>;
+		clocks = <&menetclk 0>;
+		local-mac-address = [00 01 73 00 00 01];
+		phy-connection-type = "rgmii";
+		phy-handle = <&menetphy>;
+		mdio {
+			compatible = "apm,xgene-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			menetphy: menetphy@3 {
+				compatible = "ethernet-phy-id001c.c915";
+				reg = <0x3>;
+			};
+
+		};
+	};
+
+/* Board-specific peripheral configurations */
+&menet {
+        status = "ok";
+};
diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index 6bc84ad..8a2c7b5 100644
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -12,7 +12,14 @@
   only if property "phy-reset-gpios" is available.  Missing the property
   will have the duration be 1 millisecond.  Numbers greater than 1000 are
   invalid and 1 millisecond will be used instead.
-- phy-supply: regulator that powers the Ethernet PHY.
+- phy-supply : regulator that powers the Ethernet PHY.
+- phy-handle : phandle to the PHY device connected to this device.
+- fixed-link : Assume a fixed link. See fixed-link.txt in the same directory.
+  Use instead of phy-handle.
+
+Optional subnodes:
+- mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
+  according to phy.txt in the same directory
 
 Example:
 
@@ -25,3 +32,23 @@
 	local-mac-address = [00 04 9F 01 1B B9];
 	phy-supply = <&reg_fec_supply>;
 };
+
+Example with phy specified:
+
+ethernet@83fec000 {
+	compatible = "fsl,imx51-fec", "fsl,imx27-fec";
+	reg = <0x83fec000 0x4000>;
+	interrupts = <87>;
+	phy-mode = "mii";
+	phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
+	local-mac-address = [00 04 9F 01 1B B9];
+	phy-supply = <&reg_fec_supply>;
+	phy-handle = <&ethphy>;
+	mdio {
+		ethphy: ethernet-phy@6 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <6>;
+			max-speed = <100>;
+		};
+	};
+};
diff --git a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
index c949092..ae738f5 100644
--- a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
@@ -3,6 +3,7 @@
 ** Required properties:
 
 - compatible : One of the following:
+	       "samsung,exynos3250-tmu"
 	       "samsung,exynos4412-tmu"
 	       "samsung,exynos4210-tmu"
 	       "samsung,exynos5250-tmu"
diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
index 28ef498..0ef00be 100644
--- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
@@ -1,7 +1,13 @@
 * Renesas R-Car Thermal
 
 Required properties:
-- compatible		: "renesas,rcar-thermal"
+- compatible		: "renesas,thermal-<soctype>", "renesas,rcar-thermal"
+			  as fallback.
+			  Examples with soctypes are:
+			    - "renesas,thermal-r8a73a4" (R-Mobile AP6)
+			    - "renesas,thermal-r8a7779" (R-Car H1)
+			    - "renesas,thermal-r8a7790" (R-Car H2)
+			    - "renesas,thermal-r8a7791" (R-Car M2)
 - reg			: Address range of the thermal registers.
 			  The 1st reg will be recognized as common register
 			  if it has "interrupts".
@@ -12,18 +18,18 @@
 
 Example (non interrupt support):
 
-thermal@e61f0100 {
-	compatible = "renesas,rcar-thermal";
-	reg = <0xe61f0100 0x38>;
+thermal@ffc48000 {
+	compatible = "renesas,thermal-r8a7779", "renesas,rcar-thermal";
+	reg = <0xffc48000 0x38>;
 };
 
 Example (interrupt support):
 
 thermal@e61f0000 {
-	compatible = "renesas,rcar-thermal";
+	compatible = "renesas,thermal-r8a73a4", "renesas,rcar-thermal";
 	reg = <0xe61f0000 0x14
 		0xe61f0100 0x38
 		0xe61f0200 0x38
 		0xe61f0300 0x38>;
-	interrupts = <0 69 4>;
+	interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
 };
diff --git a/Documentation/devicetree/bindings/thermal/st-thermal.txt b/Documentation/devicetree/bindings/thermal/st-thermal.txt
new file mode 100644
index 0000000..3b9251b
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/st-thermal.txt
@@ -0,0 +1,42 @@
+Binding for Thermal Sensor driver for STMicroelectronics STi series of SoCs.
+
+Required parameters:
+-------------------
+
+compatible : 	st,<SoC>-<module>-thermal; should be one of:
+		  "st,stih415-sas-thermal",
+		  "st,stih415-mpe-thermal",
+		  "st,stih416-sas-thermal"
+		  "st,stih416-mpe-thermal"
+		  "st,stid127-thermal" or
+		  "st,stih407-thermal"
+		according to the SoC type (stih415, stih416, stid127, stih407)
+		and module type (sas or mpe). On stid127 & stih407 there is only
+		one die/module, so there is no module type in the compatible
+		string.
+clock-names : 	Should be "thermal".
+		  See: Documentation/devicetree/bindings/resource-names.txt
+clocks : 	Phandle of the clock used by the thermal sensor.
+		  See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Optional parameters:
+-------------------
+
+reg : 		For non-sysconf based sensors, this should be the physical base
+		address and length of the sensor's registers.
+interrupts :	Standard way to define interrupt number.
+		Interrupt is mandatory to be defined when compatible is
+		"stih416-mpe-thermal".
+		  NB: For thermal sensor's for which no interrupt has been
+		  defined, a polling delay of 1000ms will be used to read the
+		  temperature from device.
+
+Example:
+
+	temp1@fdfe8000 {
+		compatible	= "st,stih416-mpe-thermal";
+		reg		= <0xfdfe8000 0x10>;
+		clock-names	= "thermal";
+		clocks		= <&clk_m_mpethsens>;
+		interrupts	= <GIC_SPI 23 IRQ_TYPE_NONE>;
+	};
diff --git a/Documentation/devicetree/changesets.txt b/Documentation/devicetree/changesets.txt
new file mode 100644
index 0000000..935ba5a
--- /dev/null
+++ b/Documentation/devicetree/changesets.txt
@@ -0,0 +1,40 @@
+A DT changeset is a method which allows one to apply changes
+in the live tree in such a way that either the full set of changes
+will be applied, or none of them will be. If an error occurs partway
+through applying the changeset, then the tree will be rolled back to the
+previous state. A changeset can also be removed after it has been
+applied.
+
+When a changeset is applied, all of the changes get applied to the tree
+at once before emitting OF_RECONFIG notifiers. This is so that the
+receiver sees a complete and consistent state of the tree when it
+receives the notifier.
+
+The sequence of a changeset is as follows.
+
+1. of_changeset_init() - initializes a changeset
+
+2. A number of DT tree change calls, of_changeset_attach_node(),
+of_changeset_detach_node(), of_changeset_add_property(),
+of_changeset_remove_property, of_changeset_update_property() to prepare
+a set of changes. No changes to the active tree are made at this point.
+All the change operations are recorded in the of_changeset 'entries'
+list.
+
+3. mutex_lock(of_mutex) - starts a changeset; The global of_mutex
+ensures there can only be one editor at a time.
+
+4. of_changeset_apply() - Apply the changes to the tree. Either the
+entire changeset will get applied, or if there is an error the tree will
+be restored to the previous state
+
+5. mutex_unlock(of_mutex) - All operations complete, release the mutex
+
+If a successfully applied changeset needs to be removed, it can be done
+with the following sequence.
+
+1. mutex_lock(of_mutex)
+
+2. of_changeset_revert()
+
+3. mutex_unlock(of_mutex)
diff --git a/Documentation/devicetree/todo.txt b/Documentation/devicetree/todo.txt
new file mode 100644
index 0000000..c3cf065
--- /dev/null
+++ b/Documentation/devicetree/todo.txt
@@ -0,0 +1,11 @@
+Todo list for devicetree:
+
+=== General structure ===
+- Switch from custom lists to (h)list_head for nodes and properties structure
+- Remove of_allnodes list and iterate using list of child nodes alone
+
+=== CONFIG_OF_DYNAMIC ===
+- Switch to RCU for tree updates and get rid of global spinlock
+- Document node lifecycle for CONFIG_OF_DYNAMIC
+- Always set ->full_name at of_attach_node() time
+- pseries: Get rid of open-coded tree modification from arch/powerpc/platforms/pseries/dlpar.c
diff --git a/Documentation/dmaengine.txt b/Documentation/dmaengine.txt
index 879b6e3..573e28c 100644
--- a/Documentation/dmaengine.txt
+++ b/Documentation/dmaengine.txt
@@ -84,31 +84,32 @@
    the given transaction.
 
    Interface:
-	struct dma_async_tx_descriptor *(*chan->device->device_prep_slave_sg)(
+	struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
 		struct dma_chan *chan, struct scatterlist *sgl,
 		unsigned int sg_len, enum dma_data_direction direction,
 		unsigned long flags);
 
-	struct dma_async_tx_descriptor *(*chan->device->device_prep_dma_cyclic)(
+	struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 		size_t period_len, enum dma_data_direction direction);
 
-	struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
+	struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
 		struct dma_chan *chan, struct dma_interleaved_template *xt,
 		unsigned long flags);
 
    The peripheral driver is expected to have mapped the scatterlist for
    the DMA operation prior to calling device_prep_slave_sg, and must
    keep the scatterlist mapped until the DMA operation has completed.
-   The scatterlist must be mapped using the DMA struct device.  So,
-   normal setup should look like this:
+   The scatterlist must be mapped using the DMA struct device.
+   If a mapping needs to be synchronized later, dma_sync_*_for_*() must be
+   called using the DMA struct device, too.
+   So, normal setup should look like this:
 
 	nr_sg = dma_map_sg(chan->device->dev, sgl, sg_len);
 	if (nr_sg == 0)
 		/* error */
 
-	desc = chan->device->device_prep_slave_sg(chan, sgl, nr_sg,
-			direction, flags);
+	desc = dmaengine_prep_slave_sg(chan, sgl, nr_sg, direction, flags);
 
    Once a descriptor has been obtained, the callback information can be
    added and the descriptor must then be submitted.  Some DMA engine
@@ -188,7 +189,7 @@
    description of this API.
 
    This can be used in conjunction with dma_async_is_complete() and
-   the cookie returned from 'descriptor->submit()' to check for
+   the cookie returned from dmaengine_submit() to check for
    completion of a specific DMA transaction.
 
    Note:
diff --git a/Documentation/filesystems/nfs/Exporting b/Documentation/filesystems/nfs/Exporting
index e543b1a..c8f036a 100644
--- a/Documentation/filesystems/nfs/Exporting
+++ b/Documentation/filesystems/nfs/Exporting
@@ -66,23 +66,31 @@
 
 c/ Helper routines to allocate anonymous dentries, and to help attach
    loose directory dentries at lookup time. They are:
-    d_alloc_anon(inode) will return a dentry for the given inode.
+    d_obtain_alias(inode) will return a dentry for the given inode.
       If the inode already has a dentry, one of those is returned.
       If it doesn't, a new anonymous (IS_ROOT and
         DCACHE_DISCONNECTED) dentry is allocated and attached.
       In the case of a directory, care is taken that only one dentry
       can ever be attached.
-    d_splice_alias(inode, dentry) will make sure that there is a
-      dentry with the same name and parent as the given dentry, and
-      which refers to the given inode.
-      If the inode is a directory and already has a dentry, then that
-      dentry is d_moved over the given dentry.
-      If the passed dentry gets attached, care is taken that this is
-      mutually exclusive to a d_alloc_anon operation.
-      If the passed dentry is used, NULL is returned, else the used
-      dentry is returned.  This corresponds to the calling pattern of
-      ->lookup.
-  
+    d_splice_alias(inode, dentry) or d_materialise_unique(dentry, inode)
+      will introduce a new dentry into the tree; either the passed-in
+      dentry or a preexisting alias for the given inode (such as an
+      anonymous one created by d_obtain_alias), if appropriate.  The two
+      functions differ in their handling of directories with preexisting
+      aliases:
+        d_splice_alias will use any existing IS_ROOT dentry, but it will
+	  return -EIO rather than try to move a dentry with a different
+	  parent.  This is appropriate for local filesystems, which
+	  should never see such an alias unless the filesystem is
+	  corrupted somehow (for example, if two on-disk directory
+	  entries refer to the same directory.)
+	d_materialise_unique will attempt to move any dentry.  This is
+	  appropriate for distributed filesystems, where finding a
+	  directory other than where we last cached it may be a normal
+	  consequence of concurrent operations on other hosts.
+      Both functions return NULL when the passed-in dentry is used,
+      following the calling convention of ->lookup.
+
  
 Filesystem Issues
 -----------------
@@ -120,12 +128,12 @@
 
   fh_to_dentry (mandatory)
     Given a filehandle fragment, this should find the implied object and
-    create a dentry for it (possibly with d_alloc_anon).
+    create a dentry for it (possibly with d_obtain_alias).
 
   fh_to_parent (optional but strongly recommended)
     Given a filehandle fragment, this should find the parent of the
-    implied object and create a dentry for it (possibly with d_alloc_anon).
-    May fail if the filehandle fragment is too small.
+    implied object and create a dentry for it (possibly with
+    d_obtain_alias).  May fail if the filehandle fragment is too small.
 
   get_parent (optional but strongly recommended)
     When given a dentry for a directory, this should return  a dentry for
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index a1d0d7a..61d65cc 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -1053,7 +1053,8 @@
 	If the 'rcu_walk' parameter is true, then the caller is doing a
 	pathwalk in RCU-walk mode.  Sleeping is not permitted in this mode,
 	and the caller can be asked to leave it and call again by returning
-	-ECHILD.
+	-ECHILD.  -EISDIR may also be returned to tell pathwalk to
+	ignore d_automount or any mounts.
 
 	This function is only used if DCACHE_MANAGE_TRANSIT is set on the
 	dentry being transited from.
diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt
index 8a36695..7aca13a 100644
--- a/Documentation/infiniband/user_mad.txt
+++ b/Documentation/infiniband/user_mad.txt
@@ -26,6 +26,11 @@
   ioctl.  Also, all agents registered through a file descriptor will
   be unregistered when the descriptor is closed.
 
+  2014 -- a new registration ioctl is now provided which allows additional
+       fields to be provided during registration.
+       Users of this registration call are implicitly setting the use of
+       pkey_index (see below).
+
 Receiving MADs
 
   MADs are received using read().  The receive side now supports
@@ -104,10 +109,10 @@
   The old ib_umad interface did not allow setting the P_Key index for
   MADs that are sent and did not provide a way for obtaining the P_Key
   index of received MADs.  A new layout for struct ib_user_mad_hdr
-  with a pkey_index member has been defined; however, to preserve
-  binary compatibility with older applications, this new layout will
-  not be used unless the IB_USER_MAD_ENABLE_PKEY ioctl is called
-  before a file descriptor is used for anything else.
+  with a pkey_index member has been defined; however, to preserve binary
+  compatibility with older applications, this new layout will not be used
+  unless one of IB_USER_MAD_ENABLE_PKEY or IB_USER_MAD_REGISTER_AGENT2 ioctl's
+  are called before a file descriptor is used for anything else.
 
   In September 2008, the IB_USER_MAD_ABI_VERSION will be incremented
   to 6, the new layout of struct ib_user_mad_hdr will be used by
diff --git a/Documentation/kbuild/00-INDEX b/Documentation/kbuild/00-INDEX
index e8d2b6d..8c5e6aa 100644
--- a/Documentation/kbuild/00-INDEX
+++ b/Documentation/kbuild/00-INDEX
@@ -1,5 +1,7 @@
 00-INDEX
 	- this file: info on the kernel build process
+headers_install.txt
+	- how to export Linux headers for use by userspace
 kbuild.txt
 	- developer information on kbuild
 kconfig.txt
diff --git a/Documentation/make/headers_install.txt b/Documentation/kbuild/headers_install.txt
similarity index 100%
rename from Documentation/make/headers_install.txt
rename to Documentation/kbuild/headers_install.txt
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index c600e2f..764f599 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -23,11 +23,10 @@
 	=== 4 Host Program support
 	   --- 4.1 Simple Host Program
 	   --- 4.2 Composite Host Programs
-	   --- 4.3 Defining shared libraries
-	   --- 4.4 Using C++ for host programs
-	   --- 4.5 Controlling compiler options for host programs
-	   --- 4.6 When host programs are actually built
-	   --- 4.7 Using hostprogs-$(CONFIG_FOO)
+	   --- 4.3 Using C++ for host programs
+	   --- 4.4 Controlling compiler options for host programs
+	   --- 4.5 When host programs are actually built
+	   --- 4.6 Using hostprogs-$(CONFIG_FOO)
 
 	=== 5 Kbuild clean infrastructure
 
@@ -643,29 +642,7 @@
 	Finally, the two .o files are linked to the executable, lxdialog.
 	Note: The syntax <executable>-y is not permitted for host-programs.
 
---- 4.3 Defining shared libraries
-
-	Objects with extension .so are considered shared libraries, and
-	will be compiled as position independent objects.
-	Kbuild provides support for shared libraries, but the usage
-	shall be restricted.
-	In the following example the libkconfig.so shared library is used
-	to link the executable conf.
-
-	Example:
-		#scripts/kconfig/Makefile
-		hostprogs-y     := conf
-		conf-objs       := conf.o libkconfig.so
-		libkconfig-objs := expr.o type.o
-
-	Shared libraries always require a corresponding -objs line, and
-	in the example above the shared library libkconfig is composed by
-	the two objects expr.o and type.o.
-	expr.o and type.o will be built as position independent code and
-	linked as a shared library libkconfig.so. C++ is not supported for
-	shared libraries.
-
---- 4.4 Using C++ for host programs
+--- 4.3 Using C++ for host programs
 
 	kbuild offers support for host programs written in C++. This was
 	introduced solely to support kconfig, and is not recommended
@@ -688,7 +665,7 @@
 		qconf-cxxobjs := qconf.o
 		qconf-objs    := check.o
 
---- 4.5 Controlling compiler options for host programs
+--- 4.4 Controlling compiler options for host programs
 
 	When compiling host programs, it is possible to set specific flags.
 	The programs will always be compiled utilising $(HOSTCC) passed
@@ -716,7 +693,7 @@
 	When linking qconf, it will be passed the extra option
 	"-L$(QTDIR)/lib".
 
---- 4.6 When host programs are actually built
+--- 4.5 When host programs are actually built
 
 	Kbuild will only build host-programs when they are referenced
 	as a prerequisite.
@@ -747,7 +724,7 @@
 	This will tell kbuild to build lxdialog even if not referenced in
 	any rule.
 
---- 4.7 Using hostprogs-$(CONFIG_FOO)
+--- 4.6 Using hostprogs-$(CONFIG_FOO)
 
 	A typical pattern in a Kbuild file looks like this:
 
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a8eb6af..5ae8608 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2200,6 +2200,21 @@
 			and restore using xsave. The kernel will fallback to
 			enabling legacy floating-point and sse state.
 
+	noxsaveopt	[X86] Disables xsaveopt used in saving x86 extended
+			register states. The kernel will fall back to use
+			xsave to save the states. By using this parameter,
+			performance of saving the states is degraded because
+			xsave doesn't support modified optimization while
+			xsaveopt supports it on xsaveopt enabled systems.
+
+	noxsaves	[X86] Disables xsaves and xrstors used in saving and
+			restoring x86 extended register state in compacted
+			form of xsave area. The kernel will fall back to use
+			xsaveopt and xrstor to save and restore the states
+			in standard form of xsave area. By using this
+			parameter, xsave area per process might occupy more
+			memory on xsaves enabled systems.
+
 	eagerfpu=	[X86]
 			on	enable eager fpu restore
 			off	disable eager fpu restore
diff --git a/MAINTAINERS b/MAINTAINERS
index 7e2eb4c..2f85f55 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -719,6 +719,14 @@
 F:	drivers/net/appletalk/
 F:	net/appletalk/
 
+APPLIED MICRO (APM) X-GENE SOC ETHERNET DRIVER
+M:	Iyappan Subramanian <isubramanian@apm.com>
+M:	Keyur Chudgar <kchudgar@apm.com>
+M:	Ravi Patel <rapatel@apm.com>
+S:	Supported
+F:	drivers/net/ethernet/apm/xgene/
+F:	Documentation/devicetree/bindings/net/apm-xgene-enet.txt
+
 APTINA CAMERA SENSOR PLL
 M:	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
 L:	linux-media@vger.kernel.org
diff --git a/Makefile b/Makefile
index a897c50..6aace67 100644
--- a/Makefile
+++ b/Makefile
@@ -372,6 +372,7 @@
 INSTALLKERNEL  := installkernel
 DEPMOD		= /sbin/depmod
 PERL		= perl
+PYTHON		= python
 CHECK		= sparse
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
@@ -422,7 +423,7 @@
 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 export CPP AR NM STRIP OBJCOPY OBJDUMP
-export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
+export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 
 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
@@ -687,6 +688,7 @@
 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
 # See modpost pattern 2
 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
+KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
 else
 
 # This warning generated too much noise in a regular build.
@@ -710,9 +712,16 @@
 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 
 ifdef CONFIG_DEBUG_INFO
+ifdef CONFIG_DEBUG_INFO_SPLIT
+KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
+else
 KBUILD_CFLAGS	+= -g
+endif
 KBUILD_AFLAGS	+= -Wa,-gdwarf-2
 endif
+ifdef CONFIG_DEBUG_INFO_DWARF4
+KBUILD_CFLAGS	+= $(call cc-option, -gdwarf-4,)
+endif
 
 ifdef CONFIG_DEBUG_INFO_REDUCED
 KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
@@ -1055,6 +1064,13 @@
 	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
 
 # ---------------------------------------------------------------------------
+# Kernel selftest
+
+PHONY += kselftest
+kselftest:
+	$(Q)$(MAKE) -C tools/testing/selftests run_tests
+
+# ---------------------------------------------------------------------------
 # Modules
 
 ifdef CONFIG_MODULES
@@ -1241,9 +1257,9 @@
 	@echo  '  tags/TAGS	  - Generate tags file for editors'
 	@echo  '  cscope	  - Generate cscope index'
 	@echo  '  gtags           - Generate GNU GLOBAL index'
-	@echo  '  kernelrelease	  - Output the release version string'
-	@echo  '  kernelversion	  - Output the version stored in Makefile'
-	@echo  '  image_name	  - Output the image name'
+	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
+	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
+	@echo  '  image_name	  - Output the image name (use with make -s)'
 	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
 	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
 	 echo  ''
@@ -1257,6 +1273,11 @@
 	@echo  '  headerdep       - Detect inclusion cycles in headers'
 	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
 	@echo  ''
+	@echo  'Kernel selftest'
+	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
+	@echo  '                    Build, install, and boot kernel before'
+	@echo  '                    running kselftest on it'
+	@echo  ''
 	@echo  'Kernel packaging:'
 	@$(MAKE) $(build)=$(package-dir) help
 	@echo  ''
@@ -1398,6 +1419,7 @@
 	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
 		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 		-o -name '*.ko.*' \
+		-o -name '*.dwo'  \
 		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
 		-o -name '*.symtypes' -o -name 'modules.order' \
 		-o -name modules.builtin -o -name '.tmp_*.o.*' \
diff --git a/arch/arm/boot/dts/versatile-ab.dts b/arch/arm/boot/dts/versatile-ab.dts
index 36c771a..27d0d9c 100644
--- a/arch/arm/boot/dts/versatile-ab.dts
+++ b/arch/arm/boot/dts/versatile-ab.dts
@@ -15,6 +15,10 @@
 		i2c0 = &i2c0;
 	};
 
+	chosen {
+		stdout-path = &uart0;
+	};
+
 	memory {
 		reg = <0x0 0x08000000>;
 	};
diff --git a/arch/arm/boot/dts/versatile-pb.dts b/arch/arm/boot/dts/versatile-pb.dts
index d025048..e36c1e8 100644
--- a/arch/arm/boot/dts/versatile-pb.dts
+++ b/arch/arm/boot/dts/versatile-pb.dts
@@ -56,5 +56,3 @@
 		};
 	};
 };
-
-#include <testcases.dtsi>
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 485be42..8809917 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -1414,6 +1414,34 @@
 }
 EXPORT_SYMBOL(edma_clear_event);
 
+/*
+ * edma_assign_channel_eventq - move given channel to desired eventq
+ * Arguments:
+ *	channel - channel number
+ *	eventq_no - queue to move the channel
+ *
+ * Can be used to move a channel to a selected event queue.
+ */
+void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no)
+{
+	unsigned ctlr;
+
+	ctlr = EDMA_CTLR(channel);
+	channel = EDMA_CHAN_SLOT(channel);
+
+	if (channel >= edma_cc[ctlr]->num_channels)
+		return;
+
+	/* default to low priority queue */
+	if (eventq_no == EVENTQ_DEFAULT)
+		eventq_no = edma_cc[ctlr]->default_queue;
+	if (eventq_no >= edma_cc[ctlr]->num_tc)
+		return;
+
+	map_dmach_queue(ctlr, channel, eventq_no);
+}
+EXPORT_SYMBOL(edma_assign_channel_eventq);
+
 static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
 			      struct edma *edma_cc)
 {
@@ -1470,7 +1498,8 @@
 	queue_priority_map[i][1] = -1;
 
 	pdata->queue_priority_mapping = queue_priority_map;
-	pdata->default_queue = 0;
+	/* Default queue has the lowest priority */
+	pdata->default_queue = i - 1;
 
 	return 0;
 }
diff --git a/arch/arm/xen/grant-table.c b/arch/arm/xen/grant-table.c
index 2c4041c..e437918 100644
--- a/arch/arm/xen/grant-table.c
+++ b/arch/arm/xen/grant-table.c
@@ -49,8 +49,3 @@
 {
 	return 0;
 }
-
-int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status)
-{
-	return 0;
-}
diff --git a/arch/arm64/boot/dts/apm-mustang.dts b/arch/arm64/boot/dts/apm-mustang.dts
index 6541962..b2f5622 100644
--- a/arch/arm64/boot/dts/apm-mustang.dts
+++ b/arch/arm64/boot/dts/apm-mustang.dts
@@ -28,3 +28,7 @@
 &serial0 {
 	status = "ok";
 };
+
+&menet {
+	status = "ok";
+};
diff --git a/arch/arm64/boot/dts/apm-storm.dtsi b/arch/arm64/boot/dts/apm-storm.dtsi
index 40aa96c..c0aceef 100644
--- a/arch/arm64/boot/dts/apm-storm.dtsi
+++ b/arch/arm64/boot/dts/apm-storm.dtsi
@@ -167,14 +167,13 @@
 				clock-output-names = "ethclk";
 			};
 
-			eth8clk: eth8clk {
+			menetclk: menetclk {
 				compatible = "apm,xgene-device-clock";
 				#clock-cells = <1>;
 				clocks = <&ethclk 0>;
-				clock-names = "eth8clk";
 				reg = <0x0 0x1702C000 0x0 0x1000>;
 				reg-names = "csr-reg";
-				clock-output-names = "eth8clk";
+				clock-output-names = "menetclk";
 			};
 
 			sataphy1clk: sataphy1clk@1f21c000 {
@@ -397,5 +396,30 @@
 			#clock-cells = <1>;
 			clocks = <&rtcclk 0>;
 		};
+
+		menet: ethernet@17020000 {
+			compatible = "apm,xgene-enet";
+			status = "disabled";
+			reg = <0x0 0x17020000 0x0 0xd100>,
+			      <0x0 0X17030000 0x0 0X400>,
+			      <0x0 0X10000000 0x0 0X200>;
+			reg-names = "enet_csr", "ring_csr", "ring_cmd";
+			interrupts = <0x0 0x3c 0x4>;
+			dma-coherent;
+			clocks = <&menetclk 0>;
+			local-mac-address = [00 01 73 00 00 01];
+			phy-connection-type = "rgmii";
+			phy-handle = <&menetphy>;
+			mdio {
+				compatible = "apm,xgene-mdio";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				menetphy: menetphy@3 {
+					compatible = "ethernet-phy-id001c.c915";
+					reg = <0x3>;
+				};
+
+			};
+		};
 	};
 };
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index f37238f..5441b14 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -76,7 +76,7 @@
 	$(Q)$(MAKE) $(build)=$(boot) $@
 
 unwcheck: vmlinux
-	-$(Q)READELF=$(READELF) python $(srctree)/arch/ia64/scripts/unwcheck.py $<
+	-$(Q)READELF=$(READELF) $(PYTHON) $(srctree)/arch/ia64/scripts/unwcheck.py $<
 
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c
index 0a2385f..04b7d4f 100644
--- a/arch/metag/kernel/cachepart.c
+++ b/arch/metag/kernel/cachepart.c
@@ -55,7 +55,7 @@
 	return (get_icache_size() * ((temp >> SYSC_xCPARTG_AND_S) + 1)) >> 4;
 }
 
-static unsigned int get_thread_cache_size(unsigned int cache, int thread_id)
+static int get_thread_cache_size(unsigned int cache, int thread_id)
 {
 	unsigned int cache_size;
 	unsigned int t_cache_part;
@@ -94,7 +94,7 @@
 
 void check_for_cache_aliasing(int thread_id)
 {
-	unsigned int thread_cache_size;
+	int thread_cache_size;
 	unsigned int cache_type;
 	for (cache_type = ICACHE; cache_type <= DCACHE; cache_type++) {
 		thread_cache_size =
diff --git a/arch/metag/mm/hugetlbpage.c b/arch/metag/mm/hugetlbpage.c
index 3c52fa6..3c32075 100644
--- a/arch/metag/mm/hugetlbpage.c
+++ b/arch/metag/mm/hugetlbpage.c
@@ -173,7 +173,7 @@
 				mm->context.part_huge = 0;
 			return addr;
 		}
-		if (vma && (vma->vm_flags & MAP_HUGETLB)) {
+		if (vma->vm_flags & MAP_HUGETLB) {
 			/* space after a huge vma in 2nd level page table? */
 			if (vma->vm_end & HUGEPT_MASK) {
 				after_huge = 1;
diff --git a/arch/powerpc/boot/dts/mpc5121.dtsi b/arch/powerpc/boot/dts/mpc5121.dtsi
index 2c0e155..7f9d14f 100644
--- a/arch/powerpc/boot/dts/mpc5121.dtsi
+++ b/arch/powerpc/boot/dts/mpc5121.dtsi
@@ -498,6 +498,7 @@
 			compatible = "fsl,mpc5121-dma";
 			reg = <0x14000 0x1800>;
 			interrupts = <65 0x8>;
+			#dma-cells = <1>;
 		};
 	};
 
diff --git a/arch/powerpc/boot/gunzip_util.c b/arch/powerpc/boot/gunzip_util.c
index ef2aed0..9dc5250 100644
--- a/arch/powerpc/boot/gunzip_util.c
+++ b/arch/powerpc/boot/gunzip_util.c
@@ -112,10 +112,10 @@
 		r = zlib_inflate(&state->s, Z_FULL_FLUSH);
 		if (r != Z_OK && r != Z_STREAM_END)
 			fatal("inflate returned %d msg: %s\n\r", r, state->s.msg);
-		len = state->s.next_out - (unsigned char *)dst;
+		len = state->s.next_out - (Byte *)dst;
 	} else {
 		/* uncompressed image */
-		len = min(state->s.avail_in, (unsigned)dstlen);
+		len = min(state->s.avail_in, (uLong)dstlen);
 		memcpy(dst, state->s.next_in, len);
 		state->s.next_in += len;
 		state->s.avail_in -= len;
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 642e436..daa5af9 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -459,7 +459,8 @@
 #define CPU_FTRS_POSSIBLE	\
 	    (CPU_FTRS_POWER4 | CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | \
 	     CPU_FTRS_POWER6 | CPU_FTRS_POWER7 | CPU_FTRS_POWER8E | \
-	     CPU_FTRS_POWER8 | CPU_FTRS_CELL | CPU_FTRS_PA6T | CPU_FTR_VSX)
+	     CPU_FTRS_POWER8 | CPU_FTRS_POWER8_DD1 | CPU_FTRS_CELL | \
+	     CPU_FTRS_PA6T | CPU_FTR_VSX)
 #endif
 #else
 enum {
@@ -509,7 +510,8 @@
 #define CPU_FTRS_ALWAYS		\
 	    (CPU_FTRS_POWER4 & CPU_FTRS_PPC970 & CPU_FTRS_POWER5 & \
 	     CPU_FTRS_POWER6 & CPU_FTRS_POWER7 & CPU_FTRS_CELL & \
-	     CPU_FTRS_PA6T & CPU_FTRS_POSSIBLE)
+	     CPU_FTRS_PA6T & CPU_FTRS_POWER8 & CPU_FTRS_POWER8E & \
+	     CPU_FTRS_POWER8_DD1 & CPU_FTRS_POSSIBLE)
 #endif
 #else
 enum {
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 44e9051..b125cea 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -57,10 +57,10 @@
 	void            (*hpte_removebolted)(unsigned long ea,
 					     int psize, int ssize);
 	void		(*flush_hash_range)(unsigned long number, int local);
-	void		(*hugepage_invalidate)(struct mm_struct *mm,
+	void		(*hugepage_invalidate)(unsigned long vsid,
+					       unsigned long addr,
 					       unsigned char *hpte_slot_array,
-					       unsigned long addr, int psize);
-
+					       int psize, int ssize);
 	/* special for kexec, to be called in real mode, linear mapping is
 	 * destroyed as well */
 	void		(*hpte_clear_all)(void);
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index b2f8ce1..86055e5 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -149,6 +149,8 @@
 #define OPAL_DUMP_INFO2				94
 #define OPAL_PCI_EEH_FREEZE_SET			97
 #define OPAL_HANDLE_HMI				98
+#define OPAL_REGISTER_DUMP_REGION		101
+#define OPAL_UNREGISTER_DUMP_REGION		102
 
 #ifndef __ASSEMBLY__
 
@@ -920,6 +922,8 @@
 		uint64_t length);
 int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data);
 int64_t opal_handle_hmi(void);
+int64_t opal_register_dump_region(uint32_t id, uint64_t start, uint64_t end);
+int64_t opal_unregister_dump_region(uint32_t id);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
@@ -974,6 +978,13 @@
 					     unsigned long vmalloc_size);
 void opal_free_sg_list(struct opal_sg_list *sg);
 
+/*
+ * Dump region ID range usable by the OS
+ */
+#define OPAL_DUMP_REGION_HOST_START		0x80
+#define OPAL_DUMP_REGION_LOG_BUF		0x80
+#define OPAL_DUMP_REGION_HOST_END		0xFF
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __OPAL_H */
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h
index eb92610..7b3d54f 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64.h
@@ -413,7 +413,7 @@
 }
 
 extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
-				   pmd_t *pmdp);
+				   pmd_t *pmdp, unsigned long old_pmd);
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 extern pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot);
 extern pmd_t mk_pmd(struct page *page, pgprot_t pgprot);
diff --git a/arch/powerpc/include/asm/pte-hash64-64k.h b/arch/powerpc/include/asm/pte-hash64-64k.h
index b6d2d42..4f4ec2a 100644
--- a/arch/powerpc/include/asm/pte-hash64-64k.h
+++ b/arch/powerpc/include/asm/pte-hash64-64k.h
@@ -46,11 +46,31 @@
  * in order to deal with 64K made of 4K HW pages. Thus we override the
  * generic accessors and iterators here
  */
-#define __real_pte(e,p) 	((real_pte_t) { \
-			(e), (pte_val(e) & _PAGE_COMBO) ? \
-				(pte_val(*((p) + PTRS_PER_PTE))) : 0 })
-#define __rpte_to_hidx(r,index)	((pte_val((r).pte) & _PAGE_COMBO) ? \
-        (((r).hidx >> ((index)<<2)) & 0xf) : ((pte_val((r).pte) >> 12) & 0xf))
+#define __real_pte __real_pte
+static inline real_pte_t __real_pte(pte_t pte, pte_t *ptep)
+{
+	real_pte_t rpte;
+
+	rpte.pte = pte;
+	rpte.hidx = 0;
+	if (pte_val(pte) & _PAGE_COMBO) {
+		/*
+		 * Make sure we order the hidx load against the _PAGE_COMBO
+		 * check. The store side ordering is done in __hash_page_4K
+		 */
+		smp_rmb();
+		rpte.hidx = pte_val(*((ptep) + PTRS_PER_PTE));
+	}
+	return rpte;
+}
+
+static inline unsigned long __rpte_to_hidx(real_pte_t rpte, unsigned long index)
+{
+	if ((pte_val(rpte.pte) & _PAGE_COMBO))
+		return (rpte.hidx >> (index<<2)) & 0xf;
+	return (pte_val(rpte.pte) >> 12) & 0xf;
+}
+
 #define __rpte_to_pte(r)	((r).pte)
 #define __rpte_sub_valid(rpte, index) \
 	(pte_val(rpte.pte) & (_PAGE_HPTE_SUB0 >> (index)))
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 1c987bf..0c05059 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -213,9 +213,8 @@
 #define SPRN_ACOP	0x1F	/* Available Coprocessor Register */
 #define SPRN_TFIAR	0x81	/* Transaction Failure Inst Addr   */
 #define SPRN_TEXASR	0x82	/* Transaction EXception & Summary */
-#define   TEXASR_FS	__MASK(63-36)	/* Transaction Failure Summary */
 #define SPRN_TEXASRU	0x83	/* ''	   ''	   ''	 Upper 32  */
-#define   TEXASR_FS     __MASK(63-36) /* TEXASR Failure Summary */
+#define   TEXASR_FS	__MASK(63-36) /* TEXASR Failure Summary */
 #define SPRN_TFHAR	0x80	/* Transaction Failure Handler Addr */
 #define SPRN_CTRLF	0x088
 #define SPRN_CTRLT	0x098
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 35aa339..4dbe072 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -61,6 +61,7 @@
 
 static inline int arch_spin_is_locked(arch_spinlock_t *lock)
 {
+	smp_mb();
 	return !arch_spin_value_unlocked(*lock);
 }
 
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 6144d5a..050f79a 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -592,61 +592,6 @@
 	MASKABLE_EXCEPTION_HV_OOL(0xe62, hmi_exception)
 	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62)
 
-	.globl hmi_exception_early
-hmi_exception_early:
-	EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60)
-	mr	r10,r1			/* Save r1			*/
-	ld	r1,PACAEMERGSP(r13)	/* Use emergency stack		*/
-	subi	r1,r1,INT_FRAME_SIZE	/* alloc stack frame		*/
-	std	r9,_CCR(r1)		/* save CR in stackframe	*/
-	mfspr	r11,SPRN_HSRR0		/* Save HSRR0 */
-	std	r11,_NIP(r1)		/* save HSRR0 in stackframe	*/
-	mfspr	r12,SPRN_HSRR1		/* Save SRR1 */
-	std	r12,_MSR(r1)		/* save SRR1 in stackframe	*/
-	std	r10,0(r1)		/* make stack chain pointer	*/
-	std	r0,GPR0(r1)		/* save r0 in stackframe	*/
-	std	r10,GPR1(r1)		/* save r1 in stackframe	*/
-	EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
-	EXCEPTION_PROLOG_COMMON_3(0xe60)
-	addi	r3,r1,STACK_FRAME_OVERHEAD
-	bl	hmi_exception_realmode
-	/* Windup the stack. */
-	/* Clear MSR_RI before setting SRR0 and SRR1. */
-	li	r0,MSR_RI
-	mfmsr	r9			/* get MSR value */
-	andc	r9,r9,r0
-	mtmsrd	r9,1			/* Clear MSR_RI */
-	/* Move original HSRR0 and HSRR1 into the respective regs */
-	ld	r9,_MSR(r1)
-	mtspr	SPRN_HSRR1,r9
-	ld	r3,_NIP(r1)
-	mtspr	SPRN_HSRR0,r3
-	ld	r9,_CTR(r1)
-	mtctr	r9
-	ld	r9,_XER(r1)
-	mtxer	r9
-	ld	r9,_LINK(r1)
-	mtlr	r9
-	REST_GPR(0, r1)
-	REST_8GPRS(2, r1)
-	REST_GPR(10, r1)
-	ld	r11,_CCR(r1)
-	mtcr	r11
-	REST_GPR(11, r1)
-	REST_2GPRS(12, r1)
-	/* restore original r1. */
-	ld	r1,GPR1(r1)
-
-	/*
-	 * Go to virtual mode and pull the HMI event information from
-	 * firmware.
-	 */
-	.globl hmi_exception_after_realmode
-hmi_exception_after_realmode:
-	SET_SCRATCH0(r13)
-	EXCEPTION_PROLOG_0(PACA_EXGEN)
-	b	hmi_exception_hv
-
 	MASKABLE_EXCEPTION_HV_OOL(0xe82, h_doorbell)
 	KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe82)
 
@@ -1306,6 +1251,61 @@
 	. = 0x8000
 #endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
 
+	.globl hmi_exception_early
+hmi_exception_early:
+	EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60)
+	mr	r10,r1			/* Save r1			*/
+	ld	r1,PACAEMERGSP(r13)	/* Use emergency stack		*/
+	subi	r1,r1,INT_FRAME_SIZE	/* alloc stack frame		*/
+	std	r9,_CCR(r1)		/* save CR in stackframe	*/
+	mfspr	r11,SPRN_HSRR0		/* Save HSRR0 */
+	std	r11,_NIP(r1)		/* save HSRR0 in stackframe	*/
+	mfspr	r12,SPRN_HSRR1		/* Save SRR1 */
+	std	r12,_MSR(r1)		/* save SRR1 in stackframe	*/
+	std	r10,0(r1)		/* make stack chain pointer	*/
+	std	r0,GPR0(r1)		/* save r0 in stackframe	*/
+	std	r10,GPR1(r1)		/* save r1 in stackframe	*/
+	EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
+	EXCEPTION_PROLOG_COMMON_3(0xe60)
+	addi	r3,r1,STACK_FRAME_OVERHEAD
+	bl	hmi_exception_realmode
+	/* Windup the stack. */
+	/* Clear MSR_RI before setting SRR0 and SRR1. */
+	li	r0,MSR_RI
+	mfmsr	r9			/* get MSR value */
+	andc	r9,r9,r0
+	mtmsrd	r9,1			/* Clear MSR_RI */
+	/* Move original HSRR0 and HSRR1 into the respective regs */
+	ld	r9,_MSR(r1)
+	mtspr	SPRN_HSRR1,r9
+	ld	r3,_NIP(r1)
+	mtspr	SPRN_HSRR0,r3
+	ld	r9,_CTR(r1)
+	mtctr	r9
+	ld	r9,_XER(r1)
+	mtxer	r9
+	ld	r9,_LINK(r1)
+	mtlr	r9
+	REST_GPR(0, r1)
+	REST_8GPRS(2, r1)
+	REST_GPR(10, r1)
+	ld	r11,_CCR(r1)
+	mtcr	r11
+	REST_GPR(11, r1)
+	REST_2GPRS(12, r1)
+	/* restore original r1. */
+	ld	r1,GPR1(r1)
+
+	/*
+	 * Go to virtual mode and pull the HMI event information from
+	 * firmware.
+	 */
+	.globl hmi_exception_after_realmode
+hmi_exception_after_realmode:
+	SET_SCRATCH0(r13)
+	EXCEPTION_PROLOG_0(PACA_EXGEN)
+	b	hmi_exception_hv
+
 #ifdef CONFIG_PPC_POWERNV
 _GLOBAL(opal_mc_secondary_handler)
 	HMT_MEDIUM_PPR_DISCARD
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index c334f53..b5061ab 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -1210,10 +1210,12 @@
 
 	/* We configure icbi to invalidate 128 bytes at a time since the
 	 * current 32-bit kernel code isn't too happy with icache != dcache
-	 * block size
+	 * block size. We also disable the BTAC as this can cause errors
+	 * in some circumstances (see IBM Erratum 47).
 	 */
 	mfspr	r3,SPRN_CCR0
 	oris	r3,r3,0x0020
+	ori	r3,r3,0x0040
 	mtspr	SPRN_CCR0,r3
 	isync
 
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index f84f799..a10642a 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -1120,37 +1120,41 @@
 int iommu_add_device(struct device *dev)
 {
 	struct iommu_table *tbl;
-	int ret = 0;
 
-	if (WARN_ON(dev->iommu_group)) {
-		pr_warn("iommu_tce: device %s is already in iommu group %d, skipping\n",
-				dev_name(dev),
-				iommu_group_id(dev->iommu_group));
+	/*
+	 * The sysfs entries should be populated before
+	 * binding IOMMU group. If sysfs entries isn't
+	 * ready, we simply bail.
+	 */
+	if (!device_is_registered(dev))
+		return -ENOENT;
+
+	if (dev->iommu_group) {
+		pr_debug("%s: Skipping device %s with iommu group %d\n",
+			 __func__, dev_name(dev),
+			 iommu_group_id(dev->iommu_group));
 		return -EBUSY;
 	}
 
 	tbl = get_iommu_table_base(dev);
 	if (!tbl || !tbl->it_group) {
-		pr_debug("iommu_tce: skipping device %s with no tbl\n",
-				dev_name(dev));
+		pr_debug("%s: Skipping device %s with no tbl\n",
+			 __func__, dev_name(dev));
 		return 0;
 	}
 
-	pr_debug("iommu_tce: adding %s to iommu group %d\n",
-			dev_name(dev), iommu_group_id(tbl->it_group));
+	pr_debug("%s: Adding %s to iommu group %d\n",
+		 __func__, dev_name(dev),
+		 iommu_group_id(tbl->it_group));
 
 	if (PAGE_SIZE < IOMMU_PAGE_SIZE(tbl)) {
-		pr_err("iommu_tce: unsupported iommu page size.");
-		pr_err("%s has not been added\n", dev_name(dev));
+		pr_err("%s: Invalid IOMMU page size %lx (%lx) on %s\n",
+		       __func__, IOMMU_PAGE_SIZE(tbl),
+		       PAGE_SIZE, dev_name(dev));
 		return -EINVAL;
 	}
 
-	ret = iommu_group_add_device(tbl->it_group, dev);
-	if (ret < 0)
-		pr_err("iommu_tce: %s has not been added, ret=%d\n",
-				dev_name(dev), ret);
-
-	return ret;
+	return iommu_group_add_device(tbl->it_group, dev);
 }
 EXPORT_SYMBOL_GPL(iommu_add_device);
 
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1a3b105..4e139f8 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -818,76 +818,6 @@
 }
 EXPORT_SYMBOL(cpu_to_chip_id);
 
-#ifdef CONFIG_PPC_PSERIES
-/*
- * Fix up the uninitialized fields in a new device node:
- * name, type and pci-specific fields
- */
-
-static int of_finish_dynamic_node(struct device_node *node)
-{
-	struct device_node *parent = of_get_parent(node);
-	int err = 0;
-	const phandle *ibm_phandle;
-
-	node->name = of_get_property(node, "name", NULL);
-	node->type = of_get_property(node, "device_type", NULL);
-
-	if (!node->name)
-		node->name = "<NULL>";
-	if (!node->type)
-		node->type = "<NULL>";
-
-	if (!parent) {
-		err = -ENODEV;
-		goto out;
-	}
-
-	/* We don't support that function on PowerMac, at least
-	 * not yet
-	 */
-	if (machine_is(powermac))
-		return -ENODEV;
-
-	/* fix up new node's phandle field */
-	if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL)))
-		node->phandle = *ibm_phandle;
-
-out:
-	of_node_put(parent);
-	return err;
-}
-
-static int prom_reconfig_notifier(struct notifier_block *nb,
-				  unsigned long action, void *node)
-{
-	int err;
-
-	switch (action) {
-	case OF_RECONFIG_ATTACH_NODE:
-		err = of_finish_dynamic_node(node);
-		if (err < 0)
-			printk(KERN_ERR "finish_node returned %d\n", err);
-		break;
-	default:
-		err = 0;
-		break;
-	}
-	return notifier_from_errno(err);
-}
-
-static struct notifier_block prom_reconfig_nb = {
-	.notifier_call = prom_reconfig_notifier,
-	.priority = 10, /* This one needs to run first */
-};
-
-static int __init prom_reconfig_setup(void)
-{
-	return of_reconfig_notifier_register(&prom_reconfig_nb);
-}
-__initcall(prom_reconfig_setup);
-#endif
-
 bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
 {
 	return (int)phys_id == get_hard_smp_processor_id(cpu);
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 1007fb8..a0738af 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -376,6 +376,11 @@
 					GFP_KERNEL, cpu_to_node(cpu));
 		zalloc_cpumask_var_node(&per_cpu(cpu_core_map, cpu),
 					GFP_KERNEL, cpu_to_node(cpu));
+		/*
+		 * numa_node_id() works after this.
+		 */
+		set_cpu_numa_node(cpu, numa_cpu_lookup_table[cpu]);
+		set_cpu_numa_mem(cpu, local_memory_node(numa_cpu_lookup_table[cpu]));
 	}
 
 	cpumask_set_cpu(boot_cpuid, cpu_sibling_mask(boot_cpuid));
@@ -723,12 +728,6 @@
 	}
 	traverse_core_siblings(cpu, true);
 
-	/*
-	 * numa_node_id() works after this.
-	 */
-	set_numa_node(numa_cpu_lookup_table[cpu]);
-	set_numa_mem(local_memory_node(numa_cpu_lookup_table[cpu]));
-
 	smp_wmb();
 	notify_cpu_starting(cpu);
 	set_cpu_online(cpu, true);
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index 0c9c8d7..170a034 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -70,12 +70,16 @@
 
 void arch_spin_unlock_wait(arch_spinlock_t *lock)
 {
+	smp_mb();
+
 	while (lock->slock) {
 		HMT_low();
 		if (SHARED_PROCESSOR)
 			__spin_yield(lock);
 	}
 	HMT_medium();
+
+	smp_mb();
 }
 
 EXPORT_SYMBOL(arch_spin_unlock_wait);
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index cf1d325..afc0a82 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -412,18 +412,18 @@
 	local_irq_restore(flags);
 }
 
-static void native_hugepage_invalidate(struct mm_struct *mm,
+static void native_hugepage_invalidate(unsigned long vsid,
+				       unsigned long addr,
 				       unsigned char *hpte_slot_array,
-				       unsigned long addr, int psize)
+				       int psize, int ssize)
 {
-	int ssize = 0, i;
-	int lock_tlbie;
+	int i;
 	struct hash_pte *hptep;
 	int actual_psize = MMU_PAGE_16M;
 	unsigned int max_hpte_count, valid;
 	unsigned long flags, s_addr = addr;
 	unsigned long hpte_v, want_v, shift;
-	unsigned long hidx, vpn = 0, vsid, hash, slot;
+	unsigned long hidx, vpn = 0, hash, slot;
 
 	shift = mmu_psize_defs[psize].shift;
 	max_hpte_count = 1U << (PMD_SHIFT - shift);
@@ -437,15 +437,6 @@
 
 		/* get the vpn */
 		addr = s_addr + (i * (1ul << shift));
-		if (!is_kernel_addr(addr)) {
-			ssize = user_segment_size(addr);
-			vsid = get_vsid(mm->context.id, addr, ssize);
-			WARN_ON(vsid == 0);
-		} else {
-			vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
-			ssize = mmu_kernel_ssize;
-		}
-
 		vpn = hpt_vpn(addr, vsid, ssize);
 		hash = hpt_hash(vpn, shift, ssize);
 		if (hidx & _PTEIDX_SECONDARY)
@@ -465,22 +456,13 @@
 		else
 			/* Invalidate the hpte. NOTE: this also unlocks it */
 			hptep->v = 0;
+		/*
+		 * We need to do tlb invalidate for all the address, tlbie
+		 * instruction compares entry_VA in tlb with the VA specified
+		 * here
+		 */
+		tlbie(vpn, psize, actual_psize, ssize, 0);
 	}
-	/*
-	 * Since this is a hugepage, we just need a single tlbie.
-	 * use the last vpn.
-	 */
-	lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
-	if (lock_tlbie)
-		raw_spin_lock(&native_tlbie_lock);
-
-	asm volatile("ptesync":::"memory");
-	__tlbie(vpn, psize, actual_psize, ssize);
-	asm volatile("eieio; tlbsync; ptesync":::"memory");
-
-	if (lock_tlbie)
-		raw_spin_unlock(&native_tlbie_lock);
-
 	local_irq_restore(flags);
 }
 
diff --git a/arch/powerpc/mm/hugepage-hash64.c b/arch/powerpc/mm/hugepage-hash64.c
index 826893f..5f5e632 100644
--- a/arch/powerpc/mm/hugepage-hash64.c
+++ b/arch/powerpc/mm/hugepage-hash64.c
@@ -18,6 +18,57 @@
 #include <linux/mm.h>
 #include <asm/machdep.h>
 
+static void invalidate_old_hpte(unsigned long vsid, unsigned long addr,
+				pmd_t *pmdp, unsigned int psize, int ssize)
+{
+	int i, max_hpte_count, valid;
+	unsigned long s_addr;
+	unsigned char *hpte_slot_array;
+	unsigned long hidx, shift, vpn, hash, slot;
+
+	s_addr = addr & HPAGE_PMD_MASK;
+	hpte_slot_array = get_hpte_slot_array(pmdp);
+	/*
+	 * IF we try to do a HUGE PTE update after a withdraw is done.
+	 * we will find the below NULL. This happens when we do
+	 * split_huge_page_pmd
+	 */
+	if (!hpte_slot_array)
+		return;
+
+	if (ppc_md.hugepage_invalidate)
+		return ppc_md.hugepage_invalidate(vsid, s_addr, hpte_slot_array,
+						  psize, ssize);
+	/*
+	 * No bluk hpte removal support, invalidate each entry
+	 */
+	shift = mmu_psize_defs[psize].shift;
+	max_hpte_count = HPAGE_PMD_SIZE >> shift;
+	for (i = 0; i < max_hpte_count; i++) {
+		/*
+		 * 8 bits per each hpte entries
+		 * 000| [ secondary group (one bit) | hidx (3 bits) | valid bit]
+		 */
+		valid = hpte_valid(hpte_slot_array, i);
+		if (!valid)
+			continue;
+		hidx =  hpte_hash_index(hpte_slot_array, i);
+
+		/* get the vpn */
+		addr = s_addr + (i * (1ul << shift));
+		vpn = hpt_vpn(addr, vsid, ssize);
+		hash = hpt_hash(vpn, shift, ssize);
+		if (hidx & _PTEIDX_SECONDARY)
+			hash = ~hash;
+
+		slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+		slot += hidx & _PTEIDX_GROUP_IX;
+		ppc_md.hpte_invalidate(slot, vpn, psize,
+				       MMU_PAGE_16M, ssize, 0);
+	}
+}
+
+
 int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
 		    pmd_t *pmdp, unsigned long trap, int local, int ssize,
 		    unsigned int psize)
@@ -33,7 +84,9 @@
 	 * atomically mark the linux large page PMD busy and dirty
 	 */
 	do {
-		old_pmd = pmd_val(*pmdp);
+		pmd_t pmd = ACCESS_ONCE(*pmdp);
+
+		old_pmd = pmd_val(pmd);
 		/* If PMD busy, retry the access */
 		if (unlikely(old_pmd & _PAGE_BUSY))
 			return 0;
@@ -85,6 +138,15 @@
 	vpn = hpt_vpn(ea, vsid, ssize);
 	hash = hpt_hash(vpn, shift, ssize);
 	hpte_slot_array = get_hpte_slot_array(pmdp);
+	if (psize == MMU_PAGE_4K) {
+		/*
+		 * invalidate the old hpte entry if we have that mapped via 64K
+		 * base page size. This is because demote_segment won't flush
+		 * hash page table entries.
+		 */
+		if ((old_pmd & _PAGE_HASHPTE) && !(old_pmd & _PAGE_COMBO))
+			invalidate_old_hpte(vsid, ea, pmdp, MMU_PAGE_64K, ssize);
+	}
 
 	valid = hpte_valid(hpte_slot_array, index);
 	if (valid) {
@@ -107,11 +169,8 @@
 			 * safely update this here.
 			 */
 			valid = 0;
-			new_pmd &= ~_PAGE_HPTEFLAGS;
 			hpte_slot_array[index] = 0;
-		} else
-			/* clear the busy bits and set the hash pte bits */
-			new_pmd = (new_pmd & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
+		}
 	}
 
 	if (!valid) {
@@ -119,11 +178,7 @@
 
 		/* insert new entry */
 		pa = pmd_pfn(__pmd(old_pmd)) << PAGE_SHIFT;
-repeat:
-		hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
-
-		/* clear the busy bits and set the hash pte bits */
-		new_pmd = (new_pmd & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
+		new_pmd |= _PAGE_HASHPTE;
 
 		/* Add in WIMG bits */
 		rflags |= (new_pmd & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
@@ -132,6 +187,8 @@
 		 * enable the memory coherence always
 		 */
 		rflags |= HPTE_R_M;
+repeat:
+		hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
 
 		/* Insert into the hash table, primary slot */
 		slot = ppc_md.hpte_insert(hpte_group, vpn, pa, rflags, 0,
@@ -172,8 +229,17 @@
 		mark_hpte_slot_valid(hpte_slot_array, index, slot);
 	}
 	/*
-	 * No need to use ldarx/stdcx here
+	 * Mark the pte with _PAGE_COMBO, if we are trying to hash it with
+	 * base page size 4k.
 	 */
+	if (psize == MMU_PAGE_4K)
+		new_pmd |= _PAGE_COMBO;
+	/*
+	 * The hpte valid is stored in the pgtable whose address is in the
+	 * second half of the PMD. Order this against clearing of the busy bit in
+	 * huge pmd.
+	 */
+	smp_wmb();
 	*pmdp = __pmd(new_pmd & ~_PAGE_BUSY);
 	return 0;
 }
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index d3e9a78..d7737a5 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -1049,7 +1049,7 @@
 
 void __init do_init_bootmem(void)
 {
-	int nid;
+	int nid, cpu;
 
 	min_low_pfn = 0;
 	max_low_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
@@ -1122,8 +1122,15 @@
 
 	reset_numa_cpu_lookup_table();
 	register_cpu_notifier(&ppc64_numa_nb);
-	cpu_numa_callback(&ppc64_numa_nb, CPU_UP_PREPARE,
-			  (void *)(unsigned long)boot_cpuid);
+	/*
+	 * We need the numa_cpu_lookup_table to be accurate for all CPUs,
+	 * even before we online them, so that we can use cpu_to_{node,mem}
+	 * early in boot, cf. smp_prepare_cpus().
+	 */
+	for_each_possible_cpu(cpu) {
+		cpu_numa_callback(&ppc64_numa_nb, CPU_UP_PREPARE,
+				  (void *)(unsigned long)cpu);
+	}
 }
 
 void __init paging_init(void)
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 3b3c4d3..c8d709a 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -54,6 +54,9 @@
 
 #include "mmu_decl.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/thp.h>
+
 /* Some sanity checking */
 #if TASK_SIZE_USER64 > PGTABLE_RANGE
 #error TASK_SIZE_USER64 exceeds pagetable range
@@ -537,8 +540,9 @@
 	old = pmd_val(*pmdp);
 	*pmdp = __pmd((old & ~clr) | set);
 #endif
+	trace_hugepage_update(addr, old, clr, set);
 	if (old & _PAGE_HASHPTE)
-		hpte_do_hugepage_flush(mm, addr, pmdp);
+		hpte_do_hugepage_flush(mm, addr, pmdp, old);
 	return old;
 }
 
@@ -642,10 +646,11 @@
 	 * If we didn't had the splitting flag set, go and flush the
 	 * HPTE entries.
 	 */
+	trace_hugepage_splitting(address, old);
 	if (!(old & _PAGE_SPLITTING)) {
 		/* We need to flush the hpte */
 		if (old & _PAGE_HASHPTE)
-			hpte_do_hugepage_flush(vma->vm_mm, address, pmdp);
+			hpte_do_hugepage_flush(vma->vm_mm, address, pmdp, old);
 	}
 	/*
 	 * This ensures that generic code that rely on IRQ disabling
@@ -709,6 +714,7 @@
 	assert_spin_locked(&mm->page_table_lock);
 	WARN_ON(!pmd_trans_huge(pmd));
 #endif
+	trace_hugepage_set_pmd(addr, pmd);
 	return set_pte_at(mm, addr, pmdp_ptep(pmdp), pmd_pte(pmd));
 }
 
@@ -723,7 +729,7 @@
  * neesd to be flushed.
  */
 void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
-			    pmd_t *pmdp)
+			    pmd_t *pmdp, unsigned long old_pmd)
 {
 	int ssize, i;
 	unsigned long s_addr;
@@ -745,12 +751,29 @@
 	if (!hpte_slot_array)
 		return;
 
-	/* get the base page size */
+	/* get the base page size,vsid and segment size */
+#ifdef CONFIG_DEBUG_VM
 	psize = get_slice_psize(mm, s_addr);
+	BUG_ON(psize == MMU_PAGE_16M);
+#endif
+	if (old_pmd & _PAGE_COMBO)
+		psize = MMU_PAGE_4K;
+	else
+		psize = MMU_PAGE_64K;
+
+	if (!is_kernel_addr(s_addr)) {
+		ssize = user_segment_size(s_addr);
+		vsid = get_vsid(mm->context.id, s_addr, ssize);
+		WARN_ON(vsid == 0);
+	} else {
+		vsid = get_kernel_vsid(s_addr, mmu_kernel_ssize);
+		ssize = mmu_kernel_ssize;
+	}
 
 	if (ppc_md.hugepage_invalidate)
-		return ppc_md.hugepage_invalidate(mm, hpte_slot_array,
-						  s_addr, psize);
+		return ppc_md.hugepage_invalidate(vsid, s_addr,
+						  hpte_slot_array,
+						  psize, ssize);
 	/*
 	 * No bluk hpte removal support, invalidate each entry
 	 */
@@ -768,15 +791,6 @@
 
 		/* get the vpn */
 		addr = s_addr + (i * (1ul << shift));
-		if (!is_kernel_addr(addr)) {
-			ssize = user_segment_size(addr);
-			vsid = get_vsid(mm->context.id, addr, ssize);
-			WARN_ON(vsid == 0);
-		} else {
-			vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
-			ssize = mmu_kernel_ssize;
-		}
-
 		vpn = hpt_vpn(addr, vsid, ssize);
 		hash = hpt_hash(vpn, shift, ssize);
 		if (hidx & _PTEIDX_SECONDARY)
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index c99f651..d2a94b8 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -30,6 +30,8 @@
 #include <asm/tlb.h>
 #include <asm/bug.h>
 
+#include <trace/events/thp.h>
+
 DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
 
 /*
@@ -213,10 +215,12 @@
 		if (ptep == NULL)
 			continue;
 		pte = pte_val(*ptep);
+		if (hugepage_shift)
+			trace_hugepage_invalidate(start, pte_val(pte));
 		if (!(pte & _PAGE_HASHPTE))
 			continue;
 		if (unlikely(hugepage_shift && pmd_trans_huge(*(pmd_t *)pte)))
-			hpte_do_hugepage_flush(mm, start, (pmd_t *)pte);
+			hpte_do_hugepage_flush(mm, start, (pmd_t *)ptep, pte);
 		else
 			hpte_need_flush(mm, start, ptep, pte, 0);
 	}
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 92cb18d..f38ea4d 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -581,42 +581,10 @@
 /*
  * Early initialization of the MMU TLB code
  */
-static void __early_init_mmu(int boot_cpu)
+static void early_init_this_mmu(void)
 {
 	unsigned int mas4;
 
-	/* XXX This will have to be decided at runtime, but right
-	 * now our boot and TLB miss code hard wires it. Ideally
-	 * we should find out a suitable page size and patch the
-	 * TLB miss code (either that or use the PACA to store
-	 * the value we want)
-	 */
-	mmu_linear_psize = MMU_PAGE_1G;
-
-	/* XXX This should be decided at runtime based on supported
-	 * page sizes in the TLB, but for now let's assume 16M is
-	 * always there and a good fit (which it probably is)
-	 *
-	 * Freescale booke only supports 4K pages in TLB0, so use that.
-	 */
-	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E))
-		mmu_vmemmap_psize = MMU_PAGE_4K;
-	else
-		mmu_vmemmap_psize = MMU_PAGE_16M;
-
-	/* XXX This code only checks for TLB 0 capabilities and doesn't
-	 *     check what page size combos are supported by the HW. It
-	 *     also doesn't handle the case where a separate array holds
-	 *     the IND entries from the array loaded by the PT.
-	 */
-	if (boot_cpu) {
-		/* Look for supported page sizes */
-		setup_page_sizes();
-
-		/* Look for HW tablewalk support */
-		setup_mmu_htw();
-	}
-
 	/* Set MAS4 based on page table setting */
 
 	mas4 = 0x4 << MAS4_WIMGED_SHIFT;
@@ -650,11 +618,6 @@
 	}
 	mtspr(SPRN_MAS4, mas4);
 
-	/* Set the global containing the top of the linear mapping
-	 * for use by the TLB miss code
-	 */
-	linear_map_top = memblock_end_of_DRAM();
-
 #ifdef CONFIG_PPC_FSL_BOOK3E
 	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		unsigned int num_cams;
@@ -662,10 +625,49 @@
 		/* use a quarter of the TLBCAM for bolted linear map */
 		num_cams = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) / 4;
 		linear_map_top = map_mem_in_cams(linear_map_top, num_cams);
+	}
+#endif
 
-		/* limit memory so we dont have linear faults */
-		memblock_enforce_memory_limit(linear_map_top);
+	/* A sync won't hurt us after mucking around with
+	 * the MMU configuration
+	 */
+	mb();
+}
 
+static void __init early_init_mmu_global(void)
+{
+	/* XXX This will have to be decided at runtime, but right
+	 * now our boot and TLB miss code hard wires it. Ideally
+	 * we should find out a suitable page size and patch the
+	 * TLB miss code (either that or use the PACA to store
+	 * the value we want)
+	 */
+	mmu_linear_psize = MMU_PAGE_1G;
+
+	/* XXX This should be decided at runtime based on supported
+	 * page sizes in the TLB, but for now let's assume 16M is
+	 * always there and a good fit (which it probably is)
+	 *
+	 * Freescale booke only supports 4K pages in TLB0, so use that.
+	 */
+	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E))
+		mmu_vmemmap_psize = MMU_PAGE_4K;
+	else
+		mmu_vmemmap_psize = MMU_PAGE_16M;
+
+	/* XXX This code only checks for TLB 0 capabilities and doesn't
+	 *     check what page size combos are supported by the HW. It
+	 *     also doesn't handle the case where a separate array holds
+	 *     the IND entries from the array loaded by the PT.
+	 */
+	/* Look for supported page sizes */
+	setup_page_sizes();
+
+	/* Look for HW tablewalk support */
+	setup_mmu_htw();
+
+#ifdef CONFIG_PPC_FSL_BOOK3E
+	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		if (book3e_htw_mode == PPC_HTW_NONE) {
 			extlb_level_exc = EX_TLB_SIZE;
 			patch_exception(0x1c0, exc_data_tlb_miss_bolted_book3e);
@@ -675,22 +677,41 @@
 	}
 #endif
 
-	/* A sync won't hurt us after mucking around with
-	 * the MMU configuration
+	/* Set the global containing the top of the linear mapping
+	 * for use by the TLB miss code
 	 */
-	mb();
+	linear_map_top = memblock_end_of_DRAM();
+}
+
+static void __init early_mmu_set_memory_limit(void)
+{
+#ifdef CONFIG_PPC_FSL_BOOK3E
+	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
+		/*
+		 * Limit memory so we dont have linear faults.
+		 * Unlike memblock_set_current_limit, which limits
+		 * memory available during early boot, this permanently
+		 * reduces the memory available to Linux.  We need to
+		 * do this because highmem is not supported on 64-bit.
+		 */
+		memblock_enforce_memory_limit(linear_map_top);
+	}
+#endif
 
 	memblock_set_current_limit(linear_map_top);
 }
 
+/* boot cpu only */
 void __init early_init_mmu(void)
 {
-	__early_init_mmu(1);
+	early_init_mmu_global();
+	early_init_this_mmu();
+	early_mmu_set_memory_limit();
 }
 
 void early_init_mmu_secondary(void)
 {
-	__early_init_mmu(0);
+	early_init_this_mmu();
 }
 
 void setup_initial_memory_limit(phys_addr_t first_memblock_base,
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 66d0f17..70d4f74 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -223,7 +223,7 @@
 		pr_err("h_get_24x7_catalog_page(ver=%lld, page=%lld) failed:"
 		       " rc=%ld\n",
 		       catalog_version_num, page_offset, hret);
-	kfree(page);
+	kmem_cache_free(hv_page_cache, page);
 
 	pr_devel("catalog_read: offset=%lld(%lld) count=%zu(%zu) catalog_len=%zu(%zu) => %zd\n",
 			offset, page_offset, count, page_count, catalog_len,
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c
index 1413e72..4882bfd 100644
--- a/arch/powerpc/platforms/powermac/feature.c
+++ b/arch/powerpc/platforms/powermac/feature.c
@@ -2805,25 +2805,20 @@
 		/* Enable GMAC for now for PCI probing. It will be disabled
 		 * later on after PCI probe
 		 */
-		np = of_find_node_by_name(NULL, "ethernet");
-		while(np) {
+		for_each_node_by_name(np, "ethernet")
 			if (of_device_is_compatible(np, "K2-GMAC"))
 				g5_gmac_enable(np, 0, 1);
-			np = of_find_node_by_name(np, "ethernet");
-		}
 
 		/* Enable FW before PCI probe. Will be disabled later on
 		 * Note: We should have a batter way to check that we are
 		 * dealing with uninorth internal cell and not a PCI cell
 		 * on the external PCI. The code below works though.
 		 */
-		np = of_find_node_by_name(NULL, "firewire");
-		while(np) {
+		for_each_node_by_name(np, "firewire") {
 			if (of_device_is_compatible(np, "pci106b,5811")) {
 				macio_chips[0].flags |= MACIO_FLAG_FW_SUPPORTED;
 				g5_fw_enable(np, 0, 1);
 			}
-			np = of_find_node_by_name(np, "firewire");
 		}
 	}
 #else /* CONFIG_PPC64 */
@@ -2834,13 +2829,11 @@
 		/* Enable GMAC for now for PCI probing. It will be disabled
 		 * later on after PCI probe
 		 */
-		np = of_find_node_by_name(NULL, "ethernet");
-		while(np) {
+		for_each_node_by_name(np, "ethernet") {
 			if (np->parent
 			    && of_device_is_compatible(np->parent, "uni-north")
 			    && of_device_is_compatible(np, "gmac"))
 				core99_gmac_enable(np, 0, 1);
-			np = of_find_node_by_name(np, "ethernet");
 		}
 
 		/* Enable FW before PCI probe. Will be disabled later on
@@ -2848,8 +2841,7 @@
 		 * dealing with uninorth internal cell and not a PCI cell
 		 * on the external PCI. The code below works though.
 		 */
-		np = of_find_node_by_name(NULL, "firewire");
-		while(np) {
+		for_each_node_by_name(np, "firewire") {
 			if (np->parent
 			    && of_device_is_compatible(np->parent, "uni-north")
 			    && (of_device_is_compatible(np, "pci106b,18") ||
@@ -2858,18 +2850,16 @@
 				macio_chips[0].flags |= MACIO_FLAG_FW_SUPPORTED;
 				core99_firewire_enable(np, 0, 1);
 			}
-			np = of_find_node_by_name(np, "firewire");
 		}
 
 		/* Enable ATA-100 before PCI probe. */
 		np = of_find_node_by_name(NULL, "ata-6");
-		while(np) {
+		for_each_node_by_name(np, "ata-6") {
 			if (np->parent
 			    && of_device_is_compatible(np->parent, "uni-north")
 			    && of_device_is_compatible(np, "kauai-ata")) {
 				core99_ata100_enable(np, 1);
 			}
-			np = of_find_node_by_name(np, "ata-6");
 		}
 
 		/* Switch airport off */
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index cf7009b..7e868cc 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -698,7 +698,7 @@
 {
 	struct device_node *nec;
 
-	for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
+	for_each_node_by_name(nec, "usb") {
 		struct pci_controller *hose;
 		u32 data;
 		const u32 *prop;
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index 5cbd4d6..af094ae 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -577,7 +577,7 @@
 	int ok;
 
 	/* Look for the clock chip */
-	while ((cc = of_find_node_by_name(cc, "i2c-hwclock")) != NULL) {
+	for_each_node_by_name(cc, "i2c-hwclock") {
 		p = of_get_parent(cc);
 		ok = p && of_device_is_compatible(p, "uni-n-i2c");
 		of_node_put(p);
diff --git a/arch/powerpc/platforms/powermac/udbg_adb.c b/arch/powerpc/platforms/powermac/udbg_adb.c
index 44e0b55..366bd22 100644
--- a/arch/powerpc/platforms/powermac/udbg_adb.c
+++ b/arch/powerpc/platforms/powermac/udbg_adb.c
@@ -191,7 +191,7 @@
 	 * of type "adb". If not, we return a failure, but we keep the
 	 * bext output set for now
 	 */
-	for (np = NULL; (np = of_find_node_by_name(np, "keyboard")) != NULL;) {
+	for_each_node_by_name(np, "keyboard") {
 		struct device_node *parent = of_get_parent(np);
 		int found = (parent && strcmp(parent->type, "adb") == 0);
 		of_node_put(parent);
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
index a328be4..2e6ce1b 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -245,3 +245,5 @@
 OPAL_CALL(opal_get_param,			OPAL_GET_PARAM);
 OPAL_CALL(opal_set_param,			OPAL_SET_PARAM);
 OPAL_CALL(opal_handle_hmi,			OPAL_HANDLE_HMI);
+OPAL_CALL(opal_register_dump_region,		OPAL_REGISTER_DUMP_REGION);
+OPAL_CALL(opal_unregister_dump_region,		OPAL_UNREGISTER_DUMP_REGION);
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index f0a01a4..b44eec3 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -605,6 +605,24 @@
 	return 0;
 }
 
+static void __init opal_dump_region_init(void)
+{
+	void *addr;
+	uint64_t size;
+	int rc;
+
+	/* Register kernel log buffer */
+	addr = log_buf_addr_get();
+	size = log_buf_len_get();
+	rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF,
+				       __pa(addr), size);
+	/* Don't warn if this is just an older OPAL that doesn't
+	 * know about that call
+	 */
+	if (rc && rc != OPAL_UNSUPPORTED)
+		pr_warn("DUMP: Failed to register kernel log buffer. "
+			"rc = %d\n", rc);
+}
 static int __init opal_init(void)
 {
 	struct device_node *np, *consoles;
@@ -654,6 +672,8 @@
 	/* Create "opal" kobject under /sys/firmware */
 	rc = opal_sysfs_init();
 	if (rc == 0) {
+		/* Setup dump region interface */
+		opal_dump_region_init();
 		/* Setup error log interface */
 		rc = opal_elog_init();
 		/* Setup code update interface */
@@ -694,6 +714,9 @@
 		else
 			mdelay(10);
 	}
+
+	/* Unregister memory dump region */
+	opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF);
 }
 
 /* Export this so that test modules can use it */
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index b136108..df241b1 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -857,7 +857,7 @@
 
 	pe = &phb->ioda.pe_array[pdn->pe_number];
 	WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops);
-	set_iommu_table_base(&pdev->dev, &pe->tce32_table);
+	set_iommu_table_base_and_group(&pdev->dev, &pe->tce32_table);
 }
 
 static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb,
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 7995135..c904583 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -146,7 +146,7 @@
 }
 static inline int pseries_remove_mem_node(struct device_node *np)
 {
-	return -EOPNOTSUPP;
+	return 0;
 }
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 
@@ -194,7 +194,7 @@
 	if (!memblock_size)
 		return -EINVAL;
 
-	p = (u32 *)of_get_property(pr->dn, "ibm,dynamic-memory", NULL);
+	p = (u32 *) pr->old_prop->value;
 	if (!p)
 		return -EINVAL;
 
diff --git a/arch/powerpc/platforms/pseries/hvcserver.c b/arch/powerpc/platforms/pseries/hvcserver.c
index 4557e91..eedb645 100644
--- a/arch/powerpc/platforms/pseries/hvcserver.c
+++ b/arch/powerpc/platforms/pseries/hvcserver.c
@@ -163,8 +163,8 @@
 			return retval;
 		}
 
-		last_p_partition_ID = pi_buff[0];
-		last_p_unit_address = pi_buff[1];
+		last_p_partition_ID = be64_to_cpu(pi_buff[0]);
+		last_p_unit_address = be64_to_cpu(pi_buff[1]);
 
 		/* This indicates that there are no further partners */
 		if (last_p_partition_ID == ~0UL
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 33b552f..4642d6a 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -721,13 +721,13 @@
 
 early_param("disable_ddw", disable_ddw_setup);
 
-static void remove_ddw(struct device_node *np)
+static void remove_ddw(struct device_node *np, bool remove_prop)
 {
 	struct dynamic_dma_window_prop *dwp;
 	struct property *win64;
 	const u32 *ddw_avail;
 	u64 liobn;
-	int len, ret;
+	int len, ret = 0;
 
 	ddw_avail = of_get_property(np, "ibm,ddw-applicable", &len);
 	win64 = of_find_property(np, DIRECT64_PROPNAME, NULL);
@@ -761,7 +761,8 @@
 			np->full_name, ret, ddw_avail[2], liobn);
 
 delprop:
-	ret = of_remove_property(np, win64);
+	if (remove_prop)
+		ret = of_remove_property(np, win64);
 	if (ret)
 		pr_warning("%s: failed to remove direct window property: %d\n",
 			np->full_name, ret);
@@ -805,7 +806,7 @@
 		window = kzalloc(sizeof(*window), GFP_KERNEL);
 		if (!window || len < sizeof(struct dynamic_dma_window_prop)) {
 			kfree(window);
-			remove_ddw(pdn);
+			remove_ddw(pdn, true);
 			continue;
 		}
 
@@ -1045,7 +1046,7 @@
 	kfree(window);
 
 out_clear_window:
-	remove_ddw(pdn);
+	remove_ddw(pdn, true);
 
 out_free_prop:
 	kfree(win64->name);
@@ -1255,7 +1256,14 @@
 
 	switch (action) {
 	case OF_RECONFIG_DETACH_NODE:
-		remove_ddw(np);
+		/*
+		 * Removing the property will invoke the reconfig
+		 * notifier again, which causes dead-lock on the
+		 * read-write semaphore of the notifier chain. So
+		 * we have to remove the property when releasing
+		 * the device node.
+		 */
+		remove_ddw(np, false);
 		if (pci && pci->iommu_table)
 			iommu_free_table(pci->iommu_table, np->full_name);
 
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index fbfcef5..34e6423 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -431,16 +431,17 @@
 		spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
 }
 
-static void pSeries_lpar_hugepage_invalidate(struct mm_struct *mm,
-				       unsigned char *hpte_slot_array,
-				       unsigned long addr, int psize)
+static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
+					     unsigned long addr,
+					     unsigned char *hpte_slot_array,
+					     int psize, int ssize)
 {
-	int ssize = 0, i, index = 0;
+	int i, index = 0;
 	unsigned long s_addr = addr;
 	unsigned int max_hpte_count, valid;
 	unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH];
 	unsigned long slot_array[PPC64_HUGE_HPTE_BATCH];
-	unsigned long shift, hidx, vpn = 0, vsid, hash, slot;
+	unsigned long shift, hidx, vpn = 0, hash, slot;
 
 	shift = mmu_psize_defs[psize].shift;
 	max_hpte_count = 1U << (PMD_SHIFT - shift);
@@ -453,15 +454,6 @@
 
 		/* get the vpn */
 		addr = s_addr + (i * (1ul << shift));
-		if (!is_kernel_addr(addr)) {
-			ssize = user_segment_size(addr);
-			vsid = get_vsid(mm->context.id, addr, ssize);
-			WARN_ON(vsid == 0);
-		} else {
-			vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
-			ssize = mmu_kernel_ssize;
-		}
-
 		vpn = hpt_vpn(addr, vsid, ssize);
 		hash = hpt_hash(vpn, shift, ssize);
 		if (hidx & _PTEIDX_SECONDARY)
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index cfe8a63..e724d31 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -232,8 +232,7 @@
 	struct device_node *np;
 	const char *typep;
 
-	for (np = NULL; (np = of_find_node_by_name(np,
-						   "interrupt-controller"));) {
+	for_each_node_by_name(np, "interrupt-controller") {
 		typep = of_get_property(np, "compatible", NULL);
 		if (strstr(typep, "open-pic")) {
 			pSeries_mpic_node = of_node_get(np);
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 8d198b5..b988b5a 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -24,6 +24,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/bug.h>
+#include <linux/nmi.h>
 
 #include <asm/ptrace.h>
 #include <asm/string.h>
@@ -374,6 +375,7 @@
 #endif
 
 	local_irq_save(flags);
+	hard_irq_disable();
 
 	bp = in_breakpoint_table(regs->nip, &offset);
 	if (bp != NULL) {
@@ -558,6 +560,7 @@
 #endif
 	insert_cpu_bpts();
 
+	touch_nmi_watchdog();
 	local_irq_restore(flags);
 
 	return cmd != 'X' && cmd != EOF;
diff --git a/arch/sh/drivers/dma/dma-sh.c b/arch/sh/drivers/dma/dma-sh.c
index b225656..afde2a7 100644
--- a/arch/sh/drivers/dma/dma-sh.c
+++ b/arch/sh/drivers/dma/dma-sh.c
@@ -25,7 +25,7 @@
  * Define the default configuration for dual address memory-memory transfer.
  * The 0x400 value represents auto-request, external->external.
  */
-#define RS_DUAL	(DM_INC | SM_INC | 0x400 | TS_INDEX2VAL(XMIT_SZ_32BIT))
+#define RS_DUAL	(DM_INC | SM_INC | RS_AUTO | TS_INDEX2VAL(XMIT_SZ_32BIT))
 
 static unsigned long dma_find_base(unsigned int chan)
 {
diff --git a/arch/sh/include/asm/dma-register.h b/arch/sh/include/asm/dma-register.h
index 51cd78f..c757b47 100644
--- a/arch/sh/include/asm/dma-register.h
+++ b/arch/sh/include/asm/dma-register.h
@@ -13,17 +13,17 @@
 #ifndef DMA_REGISTER_H
 #define DMA_REGISTER_H
 
-/* DMA register */
-#define SAR	0x00
-#define DAR	0x04
-#define TCR	0x08
-#define CHCR	0x0C
-#define DMAOR	0x40
+/* DMA registers */
+#define SAR	0x00	/* Source Address Register */
+#define DAR	0x04	/* Destination Address Register */
+#define TCR	0x08	/* Transfer Count Register */
+#define CHCR	0x0C	/* Channel Control Register */
+#define DMAOR	0x40	/* DMA Operation Register */
 
 /* DMAOR definitions */
-#define DMAOR_AE	0x00000004
+#define DMAOR_AE	0x00000004	/* Address Error Flag */
 #define DMAOR_NMIF	0x00000002
-#define DMAOR_DME	0x00000001
+#define DMAOR_DME	0x00000001	/* DMA Master Enable */
 
 /* Definitions for the SuperH DMAC */
 #define REQ_L	0x00000000
@@ -34,18 +34,20 @@
 #define ACK_W	0x00020000
 #define ACK_H	0x00000000
 #define ACK_L	0x00010000
-#define DM_INC	0x00004000
-#define DM_DEC	0x00008000
-#define DM_FIX	0x0000c000
-#define SM_INC	0x00001000
-#define SM_DEC	0x00002000
-#define SM_FIX	0x00003000
+#define DM_INC	0x00004000	/* Destination addresses are incremented */
+#define DM_DEC	0x00008000	/* Destination addresses are decremented */
+#define DM_FIX	0x0000c000	/* Destination address is fixed */
+#define SM_INC	0x00001000	/* Source addresses are incremented */
+#define SM_DEC	0x00002000	/* Source addresses are decremented */
+#define SM_FIX	0x00003000	/* Source address is fixed */
 #define RS_IN	0x00000200
 #define RS_OUT	0x00000300
+#define RS_AUTO	0x00000400	/* Auto Request */
+#define RS_ERS	0x00000800	/* DMA extended resource selector */
 #define TS_BLK	0x00000040
 #define TM_BUR	0x00000020
-#define CHCR_DE	0x00000001
-#define CHCR_TE	0x00000002
-#define CHCR_IE	0x00000004
+#define CHCR_DE	0x00000001	/* DMA Enable */
+#define CHCR_TE	0x00000002	/* Transfer End Flag */
+#define CHCR_IE	0x00000004	/* Interrupt Enable */
 
 #endif
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index 57f83a9..7aa7333 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -30,62 +30,62 @@
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF0_TX,
 		.addr		= 0xffe0000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x21,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF0_RX,
 		.addr		= 0xffe00014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x22,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF1_TX,
 		.addr		= 0xffe1000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x25,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF1_RX,
 		.addr		= 0xffe10014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x26,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF2_TX,
 		.addr		= 0xffe2000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x29,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF2_RX,
 		.addr		= 0xffe20014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2a,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SIUA_TX,
 		.addr		= 0xa454c098,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xb1,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SIUA_RX,
 		.addr		= 0xa454c090,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xb2,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SIUB_TX,
 		.addr		= 0xa454c09c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xb5,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SIUB_RX,
 		.addr		= 0xa454c094,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xb6,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI0_TX,
 		.addr		= 0x04ce0030,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc1,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI0_RX,
 		.addr		= 0x04ce0030,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc2,
 	},
 };
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index b9e84b1..ea5780b3 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -36,122 +36,122 @@
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF0_TX,
 		.addr		= 0xffe0000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x21,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF0_RX,
 		.addr		= 0xffe00014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x22,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF1_TX,
 		.addr		= 0xffe1000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x25,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF1_RX,
 		.addr		= 0xffe10014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x26,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF2_TX,
 		.addr		= 0xffe2000c,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x29,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF2_RX,
 		.addr		= 0xffe20014,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2a,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF3_TX,
 		.addr		= 0xa4e30020,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2d,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF3_RX,
 		.addr		= 0xa4e30024,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2e,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF4_TX,
 		.addr		= 0xa4e40020,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x31,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF4_RX,
 		.addr		= 0xa4e40024,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x32,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF5_TX,
 		.addr		= 0xa4e50020,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x35,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SCIF5_RX,
 		.addr		= 0xa4e50024,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x36,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB0D0_TX,
 		.addr		= 0xA4D80100,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0x73,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB0D0_RX,
 		.addr		= 0xA4D80100,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0x73,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB0D1_TX,
 		.addr		= 0xA4D80120,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0x77,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB0D1_RX,
 		.addr		= 0xA4D80120,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0x77,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB1D0_TX,
 		.addr		= 0xA4D90100,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xab,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB1D0_RX,
 		.addr		= 0xA4D90100,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xab,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB1D1_TX,
 		.addr		= 0xA4D90120,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xaf,
 	}, {
 		.slave_id	= SHDMA_SLAVE_USB1D1_RX,
 		.addr		= 0xA4D90120,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xaf,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI0_TX,
 		.addr		= 0x04ce0030,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc1,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI0_RX,
 		.addr		= 0x04ce0030,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc2,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI1_TX,
 		.addr		= 0x04cf0030,
-		.chcr		= DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc9,
 	}, {
 		.slave_id	= SHDMA_SLAVE_SDHI1_RX,
 		.addr		= 0x04cf0030,
-		.chcr		= DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_16BIT),
+		.chcr		= DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xca,
 	},
 };
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7757.c b/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
index 7b24ec4..18bcd70 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7757.c
@@ -123,28 +123,28 @@
 	{
 		.slave_id	= SHDMA_SLAVE_SDHI_TX,
 		.addr		= 0x1fe50030,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc5,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SDHI_RX,
 		.addr		= 0x1fe50030,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc6,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_MMCIF_TX,
 		.addr		= 0x1fcb0034,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xd3,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_MMCIF_RX,
 		.addr		= 0x1fcb0034,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_32BIT),
 		.mid_rid	= 0xd7,
 	},
@@ -154,56 +154,56 @@
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF2_TX,
 		.addr		= 0x1f4b000c,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x21,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF2_RX,
 		.addr		= 0x1f4b0014,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x22,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF3_TX,
 		.addr		= 0x1f4c000c,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x29,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF3_RX,
 		.addr		= 0x1f4c0014,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2a,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF4_TX,
 		.addr		= 0x1f4d000c,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x41,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_SCIF4_RX,
 		.addr		= 0x1f4d0014,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x42,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RSPI_TX,
 		.addr		= 0xfe480004,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc1,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RSPI_RX,
 		.addr		= 0xfe480004,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_16BIT),
 		.mid_rid	= 0xc2,
 	},
@@ -213,70 +213,70 @@
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC0_TX,
 		.addr		= 0x1e500012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x21,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC0_RX,
 		.addr		= 0x1e500013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x22,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC1_TX,
 		.addr		= 0x1e510012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x29,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC1_RX,
 		.addr		= 0x1e510013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2a,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC2_TX,
 		.addr		= 0x1e520012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xa1,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC2_RX,
 		.addr		= 0x1e520013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xa2,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC3_TX,
 		.addr		= 0x1e530012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xa9,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC3_RX,
 		.addr		= 0x1e530013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xaf,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC4_TX,
 		.addr		= 0x1e540012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xc5,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC4_RX,
 		.addr		= 0x1e540013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0xc6,
 	},
@@ -286,70 +286,70 @@
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC5_TX,
 		.addr		= 0x1e550012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x21,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC5_RX,
 		.addr		= 0x1e550013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x22,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC6_TX,
 		.addr		= 0x1e560012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x29,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC6_RX,
 		.addr		= 0x1e560013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x2a,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC7_TX,
 		.addr		= 0x1e570012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x41,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC7_RX,
 		.addr		= 0x1e570013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x42,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC8_TX,
 		.addr		= 0x1e580012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x45,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC8_RX,
 		.addr		= 0x1e580013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x46,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC9_TX,
 		.addr		= 0x1e590012,
-		.chcr		= SM_INC | 0x800 | 0x40000000 |
+		.chcr		= SM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x51,
 	},
 	{
 		.slave_id	= SHDMA_SLAVE_RIIC9_RX,
 		.addr		= 0x1e590013,
-		.chcr		= DM_INC | 0x800 | 0x40000000 |
+		.chcr		= DM_INC | RS_ERS | 0x40000000 |
 				  TS_INDEX2VAL(XMIT_SZ_8BIT),
 		.mid_rid	= 0x52,
 	},
diff --git a/arch/sparc/include/uapi/asm/unistd.h b/arch/sparc/include/uapi/asm/unistd.h
index 42f2bca..c842a89 100644
--- a/arch/sparc/include/uapi/asm/unistd.h
+++ b/arch/sparc/include/uapi/asm/unistd.h
@@ -411,8 +411,11 @@
 #define __NR_sched_setattr	343
 #define __NR_sched_getattr	344
 #define __NR_renameat2		345
+#define __NR_seccomp		346
+#define __NR_getrandom		347
+#define __NR_memfd_create	348
 
-#define NR_syscalls		346
+#define NR_syscalls		349
 
 /* Bitmask values returned from kern_features system call.  */
 #define KERN_FEATURE_MIXED_MODE_STACK	0x00000001
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index 3370945..5b1151d 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -130,7 +130,6 @@
 
 static __init void nmi_cpu_busy(void *data)
 {
-	local_irq_enable_in_hardirq();
 	while (endflag == 0)
 		mb();
 }
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 539babf..b36365f 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -432,6 +432,11 @@
 		       node->full_name);
 		return;
 	}
+
+	if (ofpci_verbose)
+		printk("    Bridge bus range [%u --> %u]\n",
+		       busrange[0], busrange[1]);
+
 	ranges = of_get_property(node, "ranges", &len);
 	simba = 0;
 	if (ranges == NULL) {
@@ -451,6 +456,10 @@
 	pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
 	bus->bridge_ctl = 0;
 
+	if (ofpci_verbose)
+		printk("    Bridge ranges[%p] simba[%d]\n",
+		       ranges, simba);
+
 	/* parse ranges property, or cook one up by hand for Simba */
 	/* PCI #address-cells == 3 and #size-cells == 2 always */
 	res = &dev->resource[PCI_BRIDGE_RESOURCES];
@@ -468,10 +477,29 @@
 	}
 	i = 1;
 	for (; len >= 32; len -= 32, ranges += 8) {
+		u64 start;
+
+		if (ofpci_verbose)
+			printk("    RAW Range[%08x:%08x:%08x:%08x:%08x:%08x:"
+			       "%08x:%08x]\n",
+			       ranges[0], ranges[1], ranges[2], ranges[3],
+			       ranges[4], ranges[5], ranges[6], ranges[7]);
+
 		flags = pci_parse_of_flags(ranges[0]);
 		size = GET_64BIT(ranges, 6);
 		if (flags == 0 || size == 0)
 			continue;
+
+		/* On PCI-Express systems, PCI bridges that have no devices downstream
+		 * have a bogus size value where the first 32-bit cell is 0xffffffff.
+		 * This results in a bogus range where start + size overflows.
+		 *
+		 * Just skip these otherwise the kernel will complain when the resource
+		 * tries to be claimed.
+		 */
+		if (size >> 32 == 0xffffffff)
+			continue;
+
 		if (flags & IORESOURCE_IO) {
 			res = bus->resource[0];
 			if (res->flags) {
@@ -490,8 +518,13 @@
 		}
 
 		res->flags = flags;
-		region.start = GET_64BIT(ranges, 1);
+		region.start = start = GET_64BIT(ranges, 1);
 		region.end = region.start + size - 1;
+
+		if (ofpci_verbose)
+			printk("      Using flags[%08x] start[%016llx] size[%016llx]\n",
+			       flags, start, size);
+
 		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 after_ranges:
@@ -584,6 +617,36 @@
 		pci_bus_register_of_sysfs(child_bus);
 }
 
+static void pci_claim_bus_resources(struct pci_bus *bus)
+{
+	struct pci_bus *child_bus;
+	struct pci_dev *dev;
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		int i;
+
+		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+			struct resource *r = &dev->resource[i];
+
+			if (r->parent || !r->start || !r->flags)
+				continue;
+
+			if (ofpci_verbose)
+				printk("PCI: Claiming %s: "
+				       "Resource %d: %016llx..%016llx [%x]\n",
+				       pci_name(dev), i,
+				       (unsigned long long)r->start,
+				       (unsigned long long)r->end,
+				       (unsigned int)r->flags);
+
+			pci_claim_resource(dev, i);
+		}
+	}
+
+	list_for_each_entry(child_bus, &bus->children, node)
+		pci_claim_bus_resources(child_bus);
+}
+
 struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 				 struct device *parent)
 {
@@ -614,6 +677,8 @@
 	pci_bus_add_devices(bus);
 	pci_bus_register_of_sysfs(bus);
 
+	pci_claim_bus_resources(bus);
+
 	return bus;
 }
 
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 8efd337..d35c490 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1671,9 +1671,12 @@
 
 static int __init init_hw_perf_events(void)
 {
+	int err;
+
 	pr_info("Performance events: ");
 
-	if (!supported_pmu()) {
+	err = pcr_arch_init();
+	if (err || !supported_pmu()) {
 		pr_cont("No support for PMU type '%s'\n", sparc_pmu_type);
 		return 0;
 	}
@@ -1685,7 +1688,7 @@
 
 	return 0;
 }
-early_initcall(init_hw_perf_events);
+pure_initcall(init_hw_perf_events);
 
 void perf_callchain_kernel(struct perf_callchain_entry *entry,
 			   struct pt_regs *regs)
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 027e099..0be7bf9 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -312,6 +312,9 @@
 	struct global_pmu_snapshot *pp;
 	int i, num;
 
+	if (!pcr_ops)
+		return;
+
 	pp = &global_cpu_snapshot[this_cpu].pmu;
 
 	num = 1;
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 7958242..b3a5d81 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -68,7 +68,7 @@
 	mid = cpu_get_hwmid(cpu_node);
 
 	if (mid < 0) {
-		printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08d", id, cpu_node);
+		printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08x", id, cpu_node);
 		mid = 0;
 	}
 	cpu_data(id).mid = mid;
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 41aa247..f7ba875 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1383,7 +1383,6 @@
 
 void __init smp_cpus_done(unsigned int max_cpus)
 {
-	pcr_arch_init();
 }
 
 void smp_send_reschedule(int cpu)
diff --git a/arch/sparc/kernel/systbls_32.S b/arch/sparc/kernel/systbls_32.S
index 85fe9b1..6a873c3 100644
--- a/arch/sparc/kernel/systbls_32.S
+++ b/arch/sparc/kernel/systbls_32.S
@@ -86,4 +86,4 @@
 /*330*/	.long sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, sys_open_by_handle_at, sys_clock_adjtime
 /*335*/	.long sys_syncfs, sys_sendmmsg, sys_setns, sys_process_vm_readv, sys_process_vm_writev
 /*340*/	.long sys_ni_syscall, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
-/*345*/	.long sys_renameat2
+/*345*/	.long sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 33ecba2..d9151b6 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -87,7 +87,7 @@
 /*330*/	.word compat_sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, compat_sys_open_by_handle_at, compat_sys_clock_adjtime
 	.word sys_syncfs, compat_sys_sendmmsg, sys_setns, compat_sys_process_vm_readv, compat_sys_process_vm_writev
 /*340*/	.word sys_kern_features, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
-	.word sys32_renameat2
+	.word sys32_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create
 
 #endif /* CONFIG_COMPAT */
 
@@ -166,4 +166,4 @@
 /*330*/	.word sys_fanotify_mark, sys_prlimit64, sys_name_to_handle_at, sys_open_by_handle_at, sys_clock_adjtime
 	.word sys_syncfs, sys_sendmmsg, sys_setns, sys_process_vm_readv, sys_process_vm_writev
 /*340*/	.word sys_kern_features, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
-	.word sys_renameat2
+	.word sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4aafd32..5d0bf1a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -434,6 +434,7 @@
 	bool "CE4100 TV platform"
 	depends on PCI
 	depends on PCI_GODIRECT
+	depends on X86_IO_APIC
 	depends on X86_32
 	depends on X86_EXTENDED_PLATFORM
 	select X86_REBOOTFIXUPS
@@ -840,6 +841,7 @@
 	def_bool y
 	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC || PCI_MSI
 	select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
+	select IRQ_DOMAIN
 
 config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
 	bool "Reroute for broken boot IRQs"
@@ -1541,7 +1543,8 @@
 
 config EFI_STUB
        bool "EFI stub support"
-       depends on EFI
+       depends on EFI && !X86_USE_3DNOW
+       select RELOCATABLE
        ---help---
           This kernel feature allows a bzImage to be loaded directly
 	  by EFI firmware without the use of a bootloader.
diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
index 0a3f9c9..473bdbe 100644
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -161,6 +161,20 @@
 	asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)		\
 		: : "i" (0), ## input)
 
+/*
+ * This is similar to alternative_input. But it has two features and
+ * respective instructions.
+ *
+ * If CPU has feature2, newinstr2 is used.
+ * Otherwise, if CPU has feature1, newinstr1 is used.
+ * Otherwise, oldinstr is used.
+ */
+#define alternative_input_2(oldinstr, newinstr1, feature1, newinstr2,	     \
+			   feature2, input...)				     \
+	asm volatile(ALTERNATIVE_2(oldinstr, newinstr1, feature1,	     \
+		newinstr2, feature2)					     \
+		: : "i" (0), ## input)
+
 /* Like alternative_input, but with a single output argument */
 #define alternative_io(oldinstr, newinstr, feature, output, input...)	\
 	asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)		\
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 79752f2..465b309 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -85,14 +85,6 @@
 #include <asm/paravirt.h>
 #endif
 
-#ifdef CONFIG_X86_64
-extern int is_vsmp_box(void);
-#else
-static inline int is_vsmp_box(void)
-{
-	return 0;
-}
-#endif
 extern int setup_profiling_timer(unsigned int);
 
 static inline void native_apic_mem_write(u32 reg, u32 v)
@@ -300,7 +292,6 @@
 
 	int dest_logical;
 	unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
-	unsigned long (*check_apicid_present)(int apicid);
 
 	void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
 					 const struct cpumask *mask);
@@ -309,21 +300,11 @@
 	void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
 
 	void (*setup_apic_routing)(void);
-	int (*multi_timer_check)(int apic, int irq);
 	int (*cpu_present_to_apicid)(int mps_cpu);
 	void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
-	void (*setup_portio_remap)(void);
 	int (*check_phys_apicid_present)(int phys_apicid);
-	void (*enable_apic_mode)(void);
 	int (*phys_pkg_id)(int cpuid_apic, int index_msb);
 
-	/*
-	 * When one of the next two hooks returns 1 the apic
-	 * is switched to this. Essentially they are additional
-	 * probe functions:
-	 */
-	int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
-
 	unsigned int (*get_apic_id)(unsigned long x);
 	unsigned long (*set_apic_id)(unsigned int id);
 	unsigned long apic_id_mask;
@@ -343,11 +324,7 @@
 	/* wakeup_secondary_cpu */
 	int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
 
-	int trampoline_phys_low;
-	int trampoline_phys_high;
-
 	bool wait_for_init_deassert;
-	void (*smp_callin_clear_local_apic)(void);
 	void (*inquire_remote_apic)(int apicid);
 
 	/* apic ops */
@@ -378,14 +355,6 @@
 	 * won't be applied properly during early boot in this case.
 	 */
 	int (*x86_32_early_logical_apicid)(int cpu);
-
-	/*
-	 * Optional method called from setup_local_APIC() after logical
-	 * apicid is guaranteed to be known to initialize apicid -> node
-	 * mapping if NUMA initialization hasn't done so already.  Don't
-	 * add new users.
-	 */
-	int (*x86_32_numa_cpu_node)(int cpu);
 #endif
 };
 
@@ -496,14 +465,12 @@
 }
 
 /*
- * Warm reset vector default position:
+ * Warm reset vector position:
  */
-#define DEFAULT_TRAMPOLINE_PHYS_LOW		0x467
-#define DEFAULT_TRAMPOLINE_PHYS_HIGH		0x469
+#define TRAMPOLINE_PHYS_LOW		0x467
+#define TRAMPOLINE_PHYS_HIGH		0x469
 
 #ifdef CONFIG_X86_64
-extern int default_acpi_madt_oem_check(char *, char *);
-
 extern void apic_send_IPI_self(int vector);
 
 DECLARE_PER_CPU(int, x2apic_extra_bits);
@@ -552,6 +519,8 @@
 	return (apicid < 255);
 }
 
+extern int default_acpi_madt_oem_check(char *, char *);
+
 extern void default_setup_apic_routing(void);
 
 extern struct apic apic_noop;
@@ -635,11 +604,6 @@
 	return physid_isset(apicid, *map);
 }
 
-static inline unsigned long default_check_apicid_present(int bit)
-{
-	return physid_isset(bit, phys_cpu_present_map);
-}
-
 static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 {
 	*retmap = *phys_map;
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index e3b8542..412ecec 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -508,9 +508,12 @@
 
 static inline void __save_fpu(struct task_struct *tsk)
 {
-	if (use_xsave())
-		xsave_state(&tsk->thread.fpu.state->xsave, -1);
-	else
+	if (use_xsave()) {
+		if (unlikely(system_state == SYSTEM_BOOTING))
+			xsave_state_booting(&tsk->thread.fpu.state->xsave, -1);
+		else
+			xsave_state(&tsk->thread.fpu.state->xsave, -1);
+	} else
 		fpu_fxsave(&tsk->thread.fpu);
 }
 
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index 230853d..0f5fb6b 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -40,9 +40,6 @@
 
 DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
 
-/* We can have at most NR_VECTORS irqs routed to a cpu at a time */
-#define MAX_HARDIRQS_PER_CPU NR_VECTORS
-
 #define __ARCH_IRQ_STAT
 
 #define inc_irq_stat(member)	this_cpu_inc(irq_stat.member)
diff --git a/arch/x86/include/asm/i8259.h b/arch/x86/include/asm/i8259.h
index a203659..ccffa53 100644
--- a/arch/x86/include/asm/i8259.h
+++ b/arch/x86/include/asm/i8259.h
@@ -67,4 +67,9 @@
 extern struct legacy_pic *legacy_pic;
 extern struct legacy_pic null_legacy_pic;
 
+static inline int nr_legacy_irqs(void)
+{
+	return legacy_pic->nr_legacy_irqs;
+}
+
 #endif /* _ASM_X86_I8259_H */
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 90f97b4..0aeed5c 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -98,6 +98,8 @@
 #define IOAPIC_AUTO     -1
 #define IOAPIC_EDGE     0
 #define IOAPIC_LEVEL    1
+#define	IOAPIC_MAP_ALLOC		0x1
+#define	IOAPIC_MAP_CHECK		0x2
 
 #ifdef CONFIG_X86_IO_APIC
 
@@ -118,9 +120,6 @@
 /* MP IRQ source entries */
 extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
 
-/* non-0 if default (table-less) MP configuration */
-extern int mpc_default_type;
-
 /* Older SiS APIC requires we rewrite the index register */
 extern int sis_apic_bug;
 
@@ -133,9 +132,6 @@
 /* -1 if "noapic" boot option passed */
 extern int noioapicreroute;
 
-/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */
-extern int timer_through_8259;
-
 /*
  * If we use the IO-APIC for IRQ routing, disable automatic
  * assignment of PCI IRQ's.
@@ -145,24 +141,17 @@
 
 struct io_apic_irq_attr;
 struct irq_cfg;
-extern int io_apic_set_pci_routing(struct device *dev, int irq,
-		 struct io_apic_irq_attr *irq_attr);
-void setup_IO_APIC_irq_extra(u32 gsi);
 extern void ioapic_insert_resources(void);
 
 extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *,
 				     unsigned int, int,
 				     struct io_apic_irq_attr *);
-extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *,
-				     unsigned int, int,
-				     struct io_apic_irq_attr *);
 extern void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg);
 
 extern void native_compose_msi_msg(struct pci_dev *pdev,
 				   unsigned int irq, unsigned int dest,
 				   struct msi_msg *msg, u8 hpet_id);
 extern void native_eoi_ioapic_pin(int apic, int pin, int vector);
-int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
 
 extern int save_ioapic_entries(void);
 extern void mask_ioapic_entries(void);
@@ -171,15 +160,40 @@
 extern void setup_ioapic_ids_from_mpc(void);
 extern void setup_ioapic_ids_from_mpc_nocheck(void);
 
+enum ioapic_domain_type {
+	IOAPIC_DOMAIN_INVALID,
+	IOAPIC_DOMAIN_LEGACY,
+	IOAPIC_DOMAIN_STRICT,
+	IOAPIC_DOMAIN_DYNAMIC,
+};
+
+struct device_node;
+struct irq_domain;
+struct irq_domain_ops;
+
+struct ioapic_domain_cfg {
+	enum ioapic_domain_type		type;
+	const struct irq_domain_ops	*ops;
+	struct device_node		*dev;
+};
+
 struct mp_ioapic_gsi{
 	u32 gsi_base;
 	u32 gsi_end;
 };
-extern struct mp_ioapic_gsi  mp_gsi_routing[];
 extern u32 gsi_top;
-int mp_find_ioapic(u32 gsi);
-int mp_find_ioapic_pin(int ioapic, u32 gsi);
-void __init mp_register_ioapic(int id, u32 address, u32 gsi_base);
+
+extern int mp_find_ioapic(u32 gsi);
+extern int mp_find_ioapic_pin(int ioapic, u32 gsi);
+extern u32 mp_pin_to_gsi(int ioapic, int pin);
+extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags);
+extern void mp_unmap_irq(int irq);
+extern void __init mp_register_ioapic(int id, u32 address, u32 gsi_base,
+				      struct ioapic_domain_cfg *cfg);
+extern int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
+			    irq_hw_number_t hwirq);
+extern void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq);
+extern int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node);
 extern void __init pre_init_apic_IRQ0(void);
 
 extern void mp_save_irq(struct mpc_intsrc *m);
@@ -217,14 +231,12 @@
 
 #define io_apic_assign_pci_irqs 0
 #define setup_ioapic_ids_from_mpc x86_init_noop
-static const int timer_through_8259 = 0;
 static inline void ioapic_insert_resources(void) { }
 #define gsi_top (NR_IRQS_LEGACY)
 static inline int mp_find_ioapic(u32 gsi) { return 0; }
-
-struct io_apic_irq_attr;
-static inline int io_apic_set_pci_routing(struct device *dev, int irq,
-		 struct io_apic_irq_attr *irq_attr) { return 0; }
+static inline u32 mp_pin_to_gsi(int ioapic, int pin) { return UINT_MAX; }
+static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags) { return gsi; }
+static inline void mp_unmap_irq(int irq) { }
 
 static inline int save_ioapic_entries(void)
 {
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index f5a6179..b07233b 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -40,8 +40,6 @@
 extern DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
 
 extern unsigned int boot_cpu_physical_apicid;
-extern unsigned int max_physical_apicid;
-extern int mpc_default_type;
 extern unsigned long mp_lapic_addr;
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -88,15 +86,6 @@
 #endif
 
 int generic_processor_info(int apicid, int version);
-#ifdef CONFIG_ACPI
-extern void mp_register_ioapic(int id, u32 address, u32 gsi_base);
-extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
-				   u32 gsi);
-extern void mp_config_acpi_legacy_irqs(void);
-struct device;
-extern int mp_register_gsi(struct device *dev, u32 gsi, int edge_level,
-				 int active_high_low);
-#endif /* CONFIG_ACPI */
 
 #define PHYSID_ARRAY_SIZE	BITS_TO_LONGS(MAX_LOCAL_APIC)
 
@@ -161,8 +150,4 @@
 
 extern physid_mask_t phys_cpu_present_map;
 
-extern int generic_mps_oem_check(struct mpc_table *, char *, char *);
-
-extern int default_acpi_madt_oem_check(char *, char *);
-
 #endif /* _ASM_X86_MPSPEC_H */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index ee30b9f..eb71ec7 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -385,8 +385,8 @@
 
 struct xsave_hdr_struct {
 	u64 xstate_bv;
-	u64 reserved1[2];
-	u64 reserved2[5];
+	u64 xcomp_bv;
+	u64 reserved[6];
 } __attribute__((packed));
 
 struct xsave_struct {
diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h
index fbeb06e..1d081ac 100644
--- a/arch/x86/include/asm/prom.h
+++ b/arch/x86/include/asm/prom.h
@@ -26,12 +26,10 @@
 extern int of_ioapic;
 extern u64 initial_dtb;
 extern void add_dtb(u64 data);
-extern void x86_add_irq_domains(void);
 void x86_of_pci_init(void);
 void x86_dtb_init(void);
 #else
 static inline void add_dtb(u64 data) { }
-static inline void x86_add_irq_domains(void) { }
 static inline void x86_of_pci_init(void) { }
 static inline void x86_dtb_init(void) { }
 #define of_ioapic 0
diff --git a/arch/x86/include/asm/smpboot_hooks.h b/arch/x86/include/asm/smpboot_hooks.h
index 49adfd7..0da7409 100644
--- a/arch/x86/include/asm/smpboot_hooks.h
+++ b/arch/x86/include/asm/smpboot_hooks.h
@@ -17,11 +17,11 @@
 	spin_unlock_irqrestore(&rtc_lock, flags);
 	local_flush_tlb();
 	pr_debug("1.\n");
-	*((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) =
-								 start_eip >> 4;
+	*((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_HIGH)) =
+							start_eip >> 4;
 	pr_debug("2.\n");
-	*((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_low)) =
-							 start_eip & 0xf;
+	*((volatile unsigned short *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) =
+							start_eip & 0xf;
 	pr_debug("3.\n");
 }
 
@@ -42,7 +42,7 @@
 	CMOS_WRITE(0, 0xf);
 	spin_unlock_irqrestore(&rtc_lock, flags);
 
-	*((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0;
+	*((volatile u32 *)phys_to_virt(TRAMPOLINE_PHYS_LOW)) = 0;
 }
 
 static inline void __init smpboot_setup_io_apic(void)
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index d949ef2..7e7a79a 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -52,24 +52,170 @@
 extern void update_regset_xstate_info(unsigned int size, u64 xstate_mask);
 extern int init_fpu(struct task_struct *child);
 
-static inline int fpu_xrstor_checking(struct xsave_struct *fx)
-{
-	int err;
+/* These macros all use (%edi)/(%rdi) as the single memory argument. */
+#define XSAVE		".byte " REX_PREFIX "0x0f,0xae,0x27"
+#define XSAVEOPT	".byte " REX_PREFIX "0x0f,0xae,0x37"
+#define XSAVES		".byte " REX_PREFIX "0x0f,0xc7,0x2f"
+#define XRSTOR		".byte " REX_PREFIX "0x0f,0xae,0x2f"
+#define XRSTORS		".byte " REX_PREFIX "0x0f,0xc7,0x1f"
 
-	asm volatile("1: .byte " REX_PREFIX "0x0f,0xae,0x2f\n\t"
-		     "2:\n"
-		     ".section .fixup,\"ax\"\n"
-		     "3:  movl $-1,%[err]\n"
-		     "    jmp  2b\n"
-		     ".previous\n"
-		     _ASM_EXTABLE(1b, 3b)
-		     : [err] "=r" (err)
-		     : "D" (fx), "m" (*fx), "a" (-1), "d" (-1), "0" (0)
+#define xstate_fault	".section .fixup,\"ax\"\n"	\
+			"3:  movl $-1,%[err]\n"		\
+			"    jmp  2b\n"			\
+			".previous\n"			\
+			_ASM_EXTABLE(1b, 3b)		\
+			: [err] "=r" (err)
+
+/*
+ * This function is called only during boot time when x86 caps are not set
+ * up and alternative can not be used yet.
+ */
+static inline int xsave_state_booting(struct xsave_struct *fx, u64 mask)
+{
+	u32 lmask = mask;
+	u32 hmask = mask >> 32;
+	int err = 0;
+
+	WARN_ON(system_state != SYSTEM_BOOTING);
+
+	if (boot_cpu_has(X86_FEATURE_XSAVES))
+		asm volatile("1:"XSAVES"\n\t"
+			"2:\n\t"
+			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
+			:   "memory");
+	else
+		asm volatile("1:"XSAVE"\n\t"
+			"2:\n\t"
+			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
+			:   "memory");
+
+	asm volatile(xstate_fault
+		     : "0" (0)
 		     : "memory");
 
 	return err;
 }
 
+/*
+ * This function is called only during boot time when x86 caps are not set
+ * up and alternative can not be used yet.
+ */
+static inline int xrstor_state_booting(struct xsave_struct *fx, u64 mask)
+{
+	u32 lmask = mask;
+	u32 hmask = mask >> 32;
+	int err = 0;
+
+	WARN_ON(system_state != SYSTEM_BOOTING);
+
+	if (boot_cpu_has(X86_FEATURE_XSAVES))
+		asm volatile("1:"XRSTORS"\n\t"
+			"2:\n\t"
+			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
+			:   "memory");
+	else
+		asm volatile("1:"XRSTOR"\n\t"
+			"2:\n\t"
+			: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
+			:   "memory");
+
+	asm volatile(xstate_fault
+		     : "0" (0)
+		     : "memory");
+
+	return err;
+}
+
+/*
+ * Save processor xstate to xsave area.
+ */
+static inline int xsave_state(struct xsave_struct *fx, u64 mask)
+{
+	u32 lmask = mask;
+	u32 hmask = mask >> 32;
+	int err = 0;
+
+	/*
+	 * If xsaves is enabled, xsaves replaces xsaveopt because
+	 * it supports compact format and supervisor states in addition to
+	 * modified optimization in xsaveopt.
+	 *
+	 * Otherwise, if xsaveopt is enabled, xsaveopt replaces xsave
+	 * because xsaveopt supports modified optimization which is not
+	 * supported by xsave.
+	 *
+	 * If none of xsaves and xsaveopt is enabled, use xsave.
+	 */
+	alternative_input_2(
+		"1:"XSAVE,
+		"1:"XSAVEOPT,
+		X86_FEATURE_XSAVEOPT,
+		"1:"XSAVES,
+		X86_FEATURE_XSAVES,
+		[fx] "D" (fx), "a" (lmask), "d" (hmask) :
+		"memory");
+	asm volatile("2:\n\t"
+		     xstate_fault
+		     : "0" (0)
+		     : "memory");
+
+	return err;
+}
+
+/*
+ * Restore processor xstate from xsave area.
+ */
+static inline int xrstor_state(struct xsave_struct *fx, u64 mask)
+{
+	int err = 0;
+	u32 lmask = mask;
+	u32 hmask = mask >> 32;
+
+	/*
+	 * Use xrstors to restore context if it is enabled. xrstors supports
+	 * compacted format of xsave area which is not supported by xrstor.
+	 */
+	alternative_input(
+		"1: " XRSTOR,
+		"1: " XRSTORS,
+		X86_FEATURE_XSAVES,
+		"D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
+		: "memory");
+
+	asm volatile("2:\n"
+		     xstate_fault
+		     : "0" (0)
+		     : "memory");
+
+	return err;
+}
+
+/*
+ * Save xstate context for old process during context switch.
+ */
+static inline void fpu_xsave(struct fpu *fpu)
+{
+	xsave_state(&fpu->state->xsave, -1);
+}
+
+/*
+ * Restore xstate context for new process during context switch.
+ */
+static inline int fpu_xrstor_checking(struct xsave_struct *fx)
+{
+	return xrstor_state(fx, -1);
+}
+
+/*
+ * Save xstate to user space xsave area.
+ *
+ * We don't use modified optimization because xrstor/xrstors might track
+ * a different application.
+ *
+ * We don't use compacted format xsave area for
+ * backward compatibility for old applications which don't understand
+ * compacted format of xsave area.
+ */
 static inline int xsave_user(struct xsave_struct __user *buf)
 {
 	int err;
@@ -83,69 +229,34 @@
 		return -EFAULT;
 
 	__asm__ __volatile__(ASM_STAC "\n"
-			     "1: .byte " REX_PREFIX "0x0f,0xae,0x27\n"
+			     "1:"XSAVE"\n"
 			     "2: " ASM_CLAC "\n"
-			     ".section .fixup,\"ax\"\n"
-			     "3:  movl $-1,%[err]\n"
-			     "    jmp  2b\n"
-			     ".previous\n"
-			     _ASM_EXTABLE(1b,3b)
-			     : [err] "=r" (err)
+			     xstate_fault
 			     : "D" (buf), "a" (-1), "d" (-1), "0" (0)
 			     : "memory");
 	return err;
 }
 
+/*
+ * Restore xstate from user space xsave area.
+ */
 static inline int xrestore_user(struct xsave_struct __user *buf, u64 mask)
 {
-	int err;
+	int err = 0;
 	struct xsave_struct *xstate = ((__force struct xsave_struct *)buf);
 	u32 lmask = mask;
 	u32 hmask = mask >> 32;
 
 	__asm__ __volatile__(ASM_STAC "\n"
-			     "1: .byte " REX_PREFIX "0x0f,0xae,0x2f\n"
+			     "1:"XRSTOR"\n"
 			     "2: " ASM_CLAC "\n"
-			     ".section .fixup,\"ax\"\n"
-			     "3:  movl $-1,%[err]\n"
-			     "    jmp  2b\n"
-			     ".previous\n"
-			     _ASM_EXTABLE(1b,3b)
-			     : [err] "=r" (err)
+			     xstate_fault
 			     : "D" (xstate), "a" (lmask), "d" (hmask), "0" (0)
 			     : "memory");	/* memory required? */
 	return err;
 }
 
-static inline void xrstor_state(struct xsave_struct *fx, u64 mask)
-{
-	u32 lmask = mask;
-	u32 hmask = mask >> 32;
+void *get_xsave_addr(struct xsave_struct *xsave, int xstate);
+void setup_xstate_comp(void);
 
-	asm volatile(".byte " REX_PREFIX "0x0f,0xae,0x2f\n\t"
-		     : : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
-		     :   "memory");
-}
-
-static inline void xsave_state(struct xsave_struct *fx, u64 mask)
-{
-	u32 lmask = mask;
-	u32 hmask = mask >> 32;
-
-	asm volatile(".byte " REX_PREFIX "0x0f,0xae,0x27\n\t"
-		     : : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
-		     :   "memory");
-}
-
-static inline void fpu_xsave(struct fpu *fpu)
-{
-	/* This, however, we can work around by forcing the compiler to select
-	   an addressing mode that doesn't require extended registers. */
-	alternative_input(
-		".byte " REX_PREFIX "0x0f,0xae,0x27",
-		".byte " REX_PREFIX "0x0f,0xae,0x37",
-		X86_FEATURE_XSAVEOPT,
-		[fx] "D" (&fpu->state->xsave), "a" (-1), "d" (-1) :
-		"memory");
-}
 #endif
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index a531f65..b436fc7 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -31,6 +31,7 @@
 #include <linux/module.h>
 #include <linux/dmi.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/slab.h>
 #include <linux/bootmem.h>
 #include <linux/ioport.h>
@@ -43,6 +44,7 @@
 #include <asm/io.h>
 #include <asm/mpspec.h>
 #include <asm/smp.h>
+#include <asm/i8259.h>
 
 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
 static int __initdata acpi_force = 0;
@@ -93,44 +95,7 @@
 	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 };
 
-static unsigned int gsi_to_irq(unsigned int gsi)
-{
-	unsigned int irq = gsi + NR_IRQS_LEGACY;
-	unsigned int i;
-
-	for (i = 0; i < NR_IRQS_LEGACY; i++) {
-		if (isa_irq_to_gsi[i] == gsi) {
-			return i;
-		}
-	}
-
-	/* Provide an identity mapping of gsi == irq
-	 * except on truly weird platforms that have
-	 * non isa irqs in the first 16 gsis.
-	 */
-	if (gsi >= NR_IRQS_LEGACY)
-		irq = gsi;
-	else
-		irq = gsi_top + gsi;
-
-	return irq;
-}
-
-static u32 irq_to_gsi(int irq)
-{
-	unsigned int gsi;
-
-	if (irq < NR_IRQS_LEGACY)
-		gsi = isa_irq_to_gsi[irq];
-	else if (irq < gsi_top)
-		gsi = irq;
-	else if (irq < (gsi_top + NR_IRQS_LEGACY))
-		gsi = irq - gsi_top;
-	else
-		gsi = 0xffffffff;
-
-	return gsi;
-}
+#define	ACPI_INVALID_GSI		INT_MIN
 
 /*
  * This is just a simple wrapper around early_ioremap(),
@@ -341,11 +306,145 @@
 #endif				/*CONFIG_X86_LOCAL_APIC */
 
 #ifdef CONFIG_X86_IO_APIC
+#define MP_ISA_BUS		0
+
+static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
+					  u32 gsi)
+{
+	int ioapic;
+	int pin;
+	struct mpc_intsrc mp_irq;
+
+	/*
+	 * Convert 'gsi' to 'ioapic.pin'.
+	 */
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return;
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+
+	/*
+	 * TBD: This check is for faulty timer entries, where the override
+	 *      erroneously sets the trigger to level, resulting in a HUGE
+	 *      increase of timer interrupts!
+	 */
+	if ((bus_irq == 0) && (trigger == 3))
+		trigger = 1;
+
+	mp_irq.type = MP_INTSRC;
+	mp_irq.irqtype = mp_INT;
+	mp_irq.irqflag = (trigger << 2) | polarity;
+	mp_irq.srcbus = MP_ISA_BUS;
+	mp_irq.srcbusirq = bus_irq;	/* IRQ */
+	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
+	mp_irq.dstirq = pin;	/* INTIN# */
+
+	mp_save_irq(&mp_irq);
+
+	/*
+	 * Reset default identity mapping if gsi is also an legacy IRQ,
+	 * otherwise there will be more than one entry with the same GSI
+	 * and acpi_isa_irq_to_gsi() may give wrong result.
+	 */
+	if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
+		isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
+	isa_irq_to_gsi[bus_irq] = gsi;
+}
+
+static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
+			int polarity)
+{
+#ifdef CONFIG_X86_MPPARSE
+	struct mpc_intsrc mp_irq;
+	struct pci_dev *pdev;
+	unsigned char number;
+	unsigned int devfn;
+	int ioapic;
+	u8 pin;
+
+	if (!acpi_ioapic)
+		return 0;
+	if (!dev || !dev_is_pci(dev))
+		return 0;
+
+	pdev = to_pci_dev(dev);
+	number = pdev->bus->number;
+	devfn = pdev->devfn;
+	pin = pdev->pin;
+	/* print the entry should happen on mptable identically */
+	mp_irq.type = MP_INTSRC;
+	mp_irq.irqtype = mp_INT;
+	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
+				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
+	mp_irq.srcbus = number;
+	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
+	ioapic = mp_find_ioapic(gsi);
+	mp_irq.dstapic = mpc_ioapic_id(ioapic);
+	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
+
+	mp_save_irq(&mp_irq);
+#endif
+	return 0;
+}
+
+static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
+			   int polarity)
+{
+	int irq, node;
+
+	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+		return gsi;
+
+	/* Don't set up the ACPI SCI because it's already set up */
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
+		return gsi;
+
+	trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
+	polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
+	node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
+	if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
+		pr_warn("Failed to set pin attr for GSI%d\n", gsi);
+		return -1;
+	}
+
+	irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
+	if (irq < 0)
+		return irq;
+
+	if (enable_update_mptable)
+		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
+
+	return irq;
+}
+
+static void mp_unregister_gsi(u32 gsi)
+{
+	int irq;
+
+	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+		return;
+
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
+		return;
+
+	irq = mp_map_gsi_to_irq(gsi, 0);
+	if (irq > 0)
+		mp_unmap_irq(irq);
+}
+
+static struct irq_domain_ops acpi_irqdomain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
+};
 
 static int __init
 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 {
 	struct acpi_madt_io_apic *ioapic = NULL;
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_DYNAMIC,
+		.ops = &acpi_irqdomain_ops,
+	};
 
 	ioapic = (struct acpi_madt_io_apic *)header;
 
@@ -354,8 +453,12 @@
 
 	acpi_table_print_madt_entry(header);
 
-	mp_register_ioapic(ioapic->id,
-			   ioapic->address, ioapic->global_irq_base);
+	/* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
+	if (ioapic->global_irq_base < nr_legacy_irqs())
+		cfg.type = IOAPIC_DOMAIN_LEGACY;
+
+	mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
+			   &cfg);
 
 	return 0;
 }
@@ -378,11 +481,6 @@
 	if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 
-	/*
-	 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
-	 * If GSI is < 16, this will update its flags,
-	 * else it will create a new mp_irqs[] entry.
-	 */
 	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 
 	/*
@@ -504,25 +602,28 @@
 	outb(new >> 8, 0x4d1);
 }
 
-int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 {
-	*irq = gsi_to_irq(gsi);
+	int irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
 
-#ifdef CONFIG_X86_IO_APIC
-	if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
-		setup_IO_APIC_irq_extra(gsi);
-#endif
+	if (irq >= 0) {
+		*irqp = irq;
+		return 0;
+	}
 
-	return 0;
+	return -1;
 }
 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 
 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 {
-	if (isa_irq >= 16)
-		return -1;
-	*gsi = irq_to_gsi(isa_irq);
-	return 0;
+	if (isa_irq < nr_legacy_irqs() &&
+	    isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
+		*gsi = isa_irq_to_gsi[isa_irq];
+		return 0;
+	}
+
+	return -1;
 }
 
 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
@@ -542,15 +643,25 @@
 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 				    int trigger, int polarity)
 {
+	int irq = gsi;
+
 #ifdef CONFIG_X86_IO_APIC
-	gsi = mp_register_gsi(dev, gsi, trigger, polarity);
+	irq = mp_register_gsi(dev, gsi, trigger, polarity);
 #endif
 
-	return gsi;
+	return irq;
+}
+
+static void acpi_unregister_gsi_ioapic(u32 gsi)
+{
+#ifdef CONFIG_X86_IO_APIC
+	mp_unregister_gsi(gsi);
+#endif
 }
 
 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 			   int trigger, int polarity) = acpi_register_gsi_pic;
+void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 
 #ifdef CONFIG_ACPI_SLEEP
 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
@@ -564,32 +675,22 @@
  */
 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 {
-	unsigned int irq;
-	unsigned int plat_gsi = gsi;
-
-	plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
-	irq = gsi_to_irq(plat_gsi);
-
-	return irq;
+	return __acpi_register_gsi(dev, gsi, trigger, polarity);
 }
 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 
 void acpi_unregister_gsi(u32 gsi)
 {
+	if (__acpi_unregister_gsi)
+		__acpi_unregister_gsi(gsi);
 }
 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 
-void __init acpi_set_irq_model_pic(void)
-{
-	acpi_irq_model = ACPI_IRQ_MODEL_PIC;
-	__acpi_register_gsi = acpi_register_gsi_pic;
-	acpi_ioapic = 0;
-}
-
-void __init acpi_set_irq_model_ioapic(void)
+static void __init acpi_set_irq_model_ioapic(void)
 {
 	acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 	__acpi_register_gsi = acpi_register_gsi_ioapic;
+	__acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 	acpi_ioapic = 1;
 }
 
@@ -825,9 +926,8 @@
 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 	 */
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
-				  acpi_parse_lapic_addr_ovr, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+				      acpi_parse_lapic_addr_ovr, 0);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing LAPIC address override entry\n");
@@ -852,9 +952,8 @@
 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 	 */
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
-				  acpi_parse_lapic_addr_ovr, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+				      acpi_parse_lapic_addr_ovr, 0);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing LAPIC address override entry\n");
@@ -882,11 +981,10 @@
 		return count;
 	}
 
-	x2count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
-				  acpi_parse_x2apic_nmi, 0);
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
+	x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
+					acpi_parse_x2apic_nmi, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
+				      acpi_parse_lapic_nmi, 0);
 	if (count < 0 || x2count < 0) {
 		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 		/* TBD: Cleanup to allow fallback to MPS */
@@ -897,44 +995,7 @@
 #endif				/* CONFIG_X86_LOCAL_APIC */
 
 #ifdef	CONFIG_X86_IO_APIC
-#define MP_ISA_BUS		0
-
-void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
-{
-	int ioapic;
-	int pin;
-	struct mpc_intsrc mp_irq;
-
-	/*
-	 * Convert 'gsi' to 'ioapic.pin'.
-	 */
-	ioapic = mp_find_ioapic(gsi);
-	if (ioapic < 0)
-		return;
-	pin = mp_find_ioapic_pin(ioapic, gsi);
-
-	/*
-	 * TBD: This check is for faulty timer entries, where the override
-	 *      erroneously sets the trigger to level, resulting in a HUGE
-	 *      increase of timer interrupts!
-	 */
-	if ((bus_irq == 0) && (trigger == 3))
-		trigger = 1;
-
-	mp_irq.type = MP_INTSRC;
-	mp_irq.irqtype = mp_INT;
-	mp_irq.irqflag = (trigger << 2) | polarity;
-	mp_irq.srcbus = MP_ISA_BUS;
-	mp_irq.srcbusirq = bus_irq;	/* IRQ */
-	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
-	mp_irq.dstirq = pin;	/* INTIN# */
-
-	mp_save_irq(&mp_irq);
-
-	isa_irq_to_gsi[bus_irq] = gsi;
-}
-
-void __init mp_config_acpi_legacy_irqs(void)
+static void __init mp_config_acpi_legacy_irqs(void)
 {
 	int i;
 	struct mpc_intsrc mp_irq;
@@ -952,7 +1013,7 @@
 	 * Use the default configuration for the IRQs 0-15.  Unless
 	 * overridden by (MADT) interrupt source override entries.
 	 */
-	for (i = 0; i < 16; i++) {
+	for (i = 0; i < nr_legacy_irqs(); i++) {
 		int ioapic, pin;
 		unsigned int dstapic;
 		int idx;
@@ -1000,84 +1061,6 @@
 	}
 }
 
-static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
-			int polarity)
-{
-#ifdef CONFIG_X86_MPPARSE
-	struct mpc_intsrc mp_irq;
-	struct pci_dev *pdev;
-	unsigned char number;
-	unsigned int devfn;
-	int ioapic;
-	u8 pin;
-
-	if (!acpi_ioapic)
-		return 0;
-	if (!dev || !dev_is_pci(dev))
-		return 0;
-
-	pdev = to_pci_dev(dev);
-	number = pdev->bus->number;
-	devfn = pdev->devfn;
-	pin = pdev->pin;
-	/* print the entry should happen on mptable identically */
-	mp_irq.type = MP_INTSRC;
-	mp_irq.irqtype = mp_INT;
-	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
-				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
-	mp_irq.srcbus = number;
-	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
-	ioapic = mp_find_ioapic(gsi);
-	mp_irq.dstapic = mpc_ioapic_id(ioapic);
-	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
-
-	mp_save_irq(&mp_irq);
-#endif
-	return 0;
-}
-
-int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
-{
-	int ioapic;
-	int ioapic_pin;
-	struct io_apic_irq_attr irq_attr;
-	int ret;
-
-	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
-		return gsi;
-
-	/* Don't set up the ACPI SCI because it's already set up */
-	if (acpi_gbl_FADT.sci_interrupt == gsi)
-		return gsi;
-
-	ioapic = mp_find_ioapic(gsi);
-	if (ioapic < 0) {
-		printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
-		return gsi;
-	}
-
-	ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
-
-	if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
-		printk(KERN_ERR "Invalid reference to IOAPIC pin "
-		       "%d-%d\n", mpc_ioapic_id(ioapic),
-		       ioapic_pin);
-		return gsi;
-	}
-
-	if (enable_update_mptable)
-		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
-
-	set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
-			     trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
-			     polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
-	ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
-	if (ret < 0)
-		gsi = INT_MIN;
-
-	return gsi;
-}
-
 /*
  * Parse IOAPIC related entries in MADT
  * returns 0 on success, < 0 on error
@@ -1107,9 +1090,8 @@
 		return -ENODEV;
 	}
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
-				  MAX_IO_APICS);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
+				      MAX_IO_APICS);
 	if (!count) {
 		printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 		return -ENODEV;
@@ -1118,9 +1100,8 @@
 		return count;
 	}
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
-				  nr_irqs);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
+				      acpi_parse_int_src_ovr, nr_irqs);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing interrupt source overrides entry\n");
@@ -1139,9 +1120,8 @@
 	/* Fill in identity legacy mappings where no override */
 	mp_config_acpi_legacy_irqs();
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
-				  nr_irqs);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
+				      acpi_parse_nmi_src, nr_irqs);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 		/* TBD: Cleanup to allow fallback to MPS */
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index ad28db7..6776027 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -67,7 +67,7 @@
 /*
  * The highest APIC ID seen during enumeration.
  */
-unsigned int max_physical_apicid;
+static unsigned int max_physical_apicid;
 
 /*
  * Bitmask of physically existing CPUs:
@@ -1342,17 +1342,6 @@
 	/* always use the value from LDR */
 	early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
 		logical_smp_processor_id();
-
-	/*
-	 * Some NUMA implementations (NUMAQ) don't initialize apicid to
-	 * node mapping during NUMA init.  Now that logical apicid is
-	 * guaranteed to be known, give it another chance.  This is already
-	 * a bit too late - percpu allocation has already happened without
-	 * proper NUMA affinity.
-	 */
-	if (apic->x86_32_numa_cpu_node)
-		set_apicid_to_node(early_per_cpu(x86_cpu_to_apicid, cpu),
-				   apic->x86_32_numa_cpu_node(cpu));
 #endif
 
 	/*
@@ -2053,8 +2042,6 @@
 		imcr_pic_to_apic();
 	}
 #endif
-	if (apic->enable_apic_mode)
-		apic->enable_apic_mode();
 }
 
 /**
@@ -2451,51 +2438,6 @@
 
 #ifdef CONFIG_X86_64
 
-static int apic_cluster_num(void)
-{
-	int i, clusters, zeros;
-	unsigned id;
-	u16 *bios_cpu_apicid;
-	DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
-
-	bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
-	bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
-
-	for (i = 0; i < nr_cpu_ids; i++) {
-		/* are we being called early in kernel startup? */
-		if (bios_cpu_apicid) {
-			id = bios_cpu_apicid[i];
-		} else if (i < nr_cpu_ids) {
-			if (cpu_present(i))
-				id = per_cpu(x86_bios_cpu_apicid, i);
-			else
-				continue;
-		} else
-			break;
-
-		if (id != BAD_APICID)
-			__set_bit(APIC_CLUSTERID(id), clustermap);
-	}
-
-	/* Problem:  Partially populated chassis may not have CPUs in some of
-	 * the APIC clusters they have been allocated.  Only present CPUs have
-	 * x86_bios_cpu_apicid entries, thus causing zeroes in the bitmap.
-	 * Since clusters are allocated sequentially, count zeros only if
-	 * they are bounded by ones.
-	 */
-	clusters = 0;
-	zeros = 0;
-	for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
-		if (test_bit(i, clustermap)) {
-			clusters += 1 + zeros;
-			zeros = 0;
-		} else
-			++zeros;
-	}
-
-	return clusters;
-}
-
 static int multi_checked;
 static int multi;
 
@@ -2540,20 +2482,7 @@
 int apic_is_clustered_box(void)
 {
 	dmi_check_multi();
-	if (multi)
-		return 1;
-
-	if (!is_vsmp_box())
-		return 0;
-
-	/*
-	 * ScaleMP vSMPowered boxes have one cluster per board and TSCs are
-	 * not guaranteed to be synced between boards
-	 */
-	if (apic_cluster_num() > 1)
-		return 1;
-
-	return 0;
+	return multi;
 }
 #endif
 
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 7c1b294..de918c4 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -168,21 +168,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= flat_vector_allocation_domain,
 	.init_apic_ldr			= flat_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= flat_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= flat_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -196,10 +191,7 @@
 	.send_IPI_all			= flat_send_IPI_all,
 	.send_IPI_self			= apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
@@ -283,7 +275,6 @@
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	/* not needed, but shouldn't hurt: */
@@ -291,14 +282,10 @@
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= flat_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= flat_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -312,10 +299,7 @@
 	.send_IPI_all			= physflat_send_IPI_all,
 	.send_IPI_self			= apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 8c7c982..b205cdb 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -89,16 +89,6 @@
 	return cpumask_of(0);
 }
 
-static unsigned long noop_check_apicid_used(physid_mask_t *map, int apicid)
-{
-	return physid_isset(apicid, *map);
-}
-
-static unsigned long noop_check_apicid_present(int bit)
-{
-	return physid_isset(bit, phys_cpu_present_map);
-}
-
 static void noop_vector_allocation_domain(int cpu, struct cpumask *retmask,
 					  const struct cpumask *mask)
 {
@@ -133,27 +123,21 @@
 	.target_cpus			= noop_target_cpus,
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
-	.check_apicid_used		= noop_check_apicid_used,
-	.check_apicid_present		= noop_check_apicid_present,
+	.check_apicid_used		= default_check_apicid_used,
 
 	.vector_allocation_domain	= noop_vector_allocation_domain,
 	.init_apic_ldr			= noop_init_apic_ldr,
 
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
 
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 
 	.phys_pkg_id			= noop_phys_pkg_id,
 
-	.mps_oem_check			= NULL,
-
 	.get_apic_id			= noop_get_apic_id,
 	.set_apic_id			= NULL,
 	.apic_id_mask			= 0x0F << 24,
@@ -168,12 +152,7 @@
 
 	.wakeup_secondary_cpu		= noop_wakeup_secondary_cpu,
 
-	/* should be safe */
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= noop_apic_read,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index a5b45df..ae91539 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -217,21 +217,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= flat_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= numachip_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -246,10 +241,7 @@
 	.send_IPI_self			= numachip_send_IPI_self,
 
 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL, /* REMRD not supported */
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index e4840aa..c4a8d63 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -31,11 +31,6 @@
 	return 0;
 }
 
-static unsigned long bigsmp_check_apicid_present(int bit)
-{
-	return 1;
-}
-
 static int bigsmp_early_logical_apicid(int cpu)
 {
 	/* on bigsmp, logical apicid is the same as physical */
@@ -168,21 +163,16 @@
 	.disable_esr			= 1,
 	.dest_logical			= 0,
 	.check_apicid_used		= bigsmp_check_apicid_used,
-	.check_apicid_present		= bigsmp_check_apicid_present,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= bigsmp_init_apic_ldr,
 
 	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
 	.setup_apic_routing		= bigsmp_setup_apic_routing,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= bigsmp_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= bigsmp_get_apic_id,
 	.set_apic_id			= NULL,
@@ -196,11 +186,7 @@
 	.send_IPI_all			= bigsmp_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= true,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 81e08ef..29290f5 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -31,6 +31,7 @@
 #include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/syscore_ops.h>
+#include <linux/irqdomain.h>
 #include <linux/msi.h>
 #include <linux/htirq.h>
 #include <linux/freezer.h>
@@ -62,6 +63,16 @@
 
 #define __apicdebuginit(type) static type __init
 
+#define	for_each_ioapic(idx)		\
+	for ((idx) = 0; (idx) < nr_ioapics; (idx)++)
+#define	for_each_ioapic_reverse(idx)	\
+	for ((idx) = nr_ioapics - 1; (idx) >= 0; (idx)--)
+#define	for_each_pin(idx, pin)		\
+	for ((pin) = 0; (pin) < ioapics[(idx)].nr_registers; (pin)++)
+#define	for_each_ioapic_pin(idx, pin)	\
+	for_each_ioapic((idx))		\
+		for_each_pin((idx), (pin))
+
 #define for_each_irq_pin(entry, head) \
 	for (entry = head; entry; entry = entry->next)
 
@@ -73,6 +84,17 @@
 
 static DEFINE_RAW_SPINLOCK(ioapic_lock);
 static DEFINE_RAW_SPINLOCK(vector_lock);
+static DEFINE_MUTEX(ioapic_mutex);
+static unsigned int ioapic_dynirq_base;
+static int ioapic_initialized;
+
+struct mp_pin_info {
+	int trigger;
+	int polarity;
+	int node;
+	int set;
+	u32 count;
+};
 
 static struct ioapic {
 	/*
@@ -87,7 +109,9 @@
 	struct mpc_ioapic mp_config;
 	/* IO APIC gsi routing info */
 	struct mp_ioapic_gsi  gsi_config;
-	DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
+	struct ioapic_domain_cfg irqdomain_cfg;
+	struct irq_domain *irqdomain;
+	struct mp_pin_info *pin_info;
 } ioapics[MAX_IO_APICS];
 
 #define mpc_ioapic_ver(ioapic_idx)	ioapics[ioapic_idx].mp_config.apicver
@@ -107,6 +131,41 @@
 	return &ioapics[ioapic_idx].gsi_config;
 }
 
+static inline int mp_ioapic_pin_count(int ioapic)
+{
+	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic);
+
+	return gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
+}
+
+u32 mp_pin_to_gsi(int ioapic, int pin)
+{
+	return mp_ioapic_gsi_routing(ioapic)->gsi_base + pin;
+}
+
+/*
+ * Initialize all legacy IRQs and all pins on the first IOAPIC
+ * if we have legacy interrupt controller. Kernel boot option "pirq="
+ * may rely on non-legacy pins on the first IOAPIC.
+ */
+static inline int mp_init_irq_at_boot(int ioapic, int irq)
+{
+	if (!nr_legacy_irqs())
+		return 0;
+
+	return ioapic == 0 || (irq >= 0 && irq < nr_legacy_irqs());
+}
+
+static inline struct mp_pin_info *mp_pin_info(int ioapic_idx, int pin)
+{
+	return ioapics[ioapic_idx].pin_info + pin;
+}
+
+static inline struct irq_domain *mp_ioapic_irqdomain(int ioapic)
+{
+	return ioapics[ioapic].irqdomain;
+}
+
 int nr_ioapics;
 
 /* The one past the highest gsi number used */
@@ -118,9 +177,6 @@
 /* # of MP IRQ source entries */
 int mp_irq_entries;
 
-/* GSI interrupts */
-static int nr_irqs_gsi = NR_IRQS_LEGACY;
-
 #ifdef CONFIG_EISA
 int mp_bus_id_to_type[MAX_MP_BUSSES];
 #endif
@@ -149,8 +205,7 @@
 }
 early_param("noapic", parse_noapic);
 
-static int io_apic_setup_irq_pin(unsigned int irq, int node,
-				 struct io_apic_irq_attr *attr);
+static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node);
 
 /* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
 void mp_save_irq(struct mpc_intsrc *m)
@@ -182,19 +237,15 @@
 	return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
 }
 
-
-/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
-static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
-
 int __init arch_early_irq_init(void)
 {
 	struct irq_cfg *cfg;
-	int count, node, i;
+	int i, node = cpu_to_node(0);
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		io_apic_irqs = ~0UL;
 
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		ioapics[i].saved_registers =
 			kzalloc(sizeof(struct IO_APIC_route_entry) *
 				ioapics[i].nr_registers, GFP_KERNEL);
@@ -202,28 +253,20 @@
 			pr_err("IOAPIC %d: suspend/resume impossible!\n", i);
 	}
 
-	cfg = irq_cfgx;
-	count = ARRAY_SIZE(irq_cfgx);
-	node = cpu_to_node(0);
-
-	for (i = 0; i < count; i++) {
-		irq_set_chip_data(i, &cfg[i]);
-		zalloc_cpumask_var_node(&cfg[i].domain, GFP_KERNEL, node);
-		zalloc_cpumask_var_node(&cfg[i].old_domain, GFP_KERNEL, node);
-		/*
-		 * For legacy IRQ's, start with assigning irq0 to irq15 to
-		 * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
-		 */
-		if (i < legacy_pic->nr_legacy_irqs) {
-			cfg[i].vector = IRQ0_VECTOR + i;
-			cpumask_setall(cfg[i].domain);
-		}
+	/*
+	 * For legacy IRQ's, start with assigning irq0 to irq15 to
+	 * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
+	 */
+	for (i = 0; i < nr_legacy_irqs(); i++) {
+		cfg = alloc_irq_and_cfg_at(i, node);
+		cfg->vector = IRQ0_VECTOR + i;
+		cpumask_setall(cfg->domain);
 	}
 
 	return 0;
 }
 
-static struct irq_cfg *irq_cfg(unsigned int irq)
+static inline struct irq_cfg *irq_cfg(unsigned int irq)
 {
 	return irq_get_chip_data(irq);
 }
@@ -265,7 +308,7 @@
 	if (res < 0) {
 		if (res != -EEXIST)
 			return NULL;
-		cfg = irq_get_chip_data(at);
+		cfg = irq_cfg(at);
 		if (cfg)
 			return cfg;
 	}
@@ -425,6 +468,21 @@
 	return 0;
 }
 
+static void __remove_pin_from_irq(struct irq_cfg *cfg, int apic, int pin)
+{
+	struct irq_pin_list **last, *entry;
+
+	last = &cfg->irq_2_pin;
+	for_each_irq_pin(entry, cfg->irq_2_pin)
+		if (entry->apic == apic && entry->pin == pin) {
+			*last = entry->next;
+			kfree(entry);
+			return;
+		} else {
+			last = &entry->next;
+		}
+}
+
 static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
 {
 	if (__add_pin_to_irq_node(cfg, node, apic, pin))
@@ -627,9 +685,8 @@
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++)
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
-			clear_IO_APIC_pin(apic, pin);
+	for_each_ioapic_pin(apic, pin)
+		clear_IO_APIC_pin(apic, pin);
 }
 
 #ifdef CONFIG_X86_32
@@ -678,13 +735,13 @@
 	int apic, pin;
 	int err = 0;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers) {
 			err = -ENOMEM;
 			continue;
 		}
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
+		for_each_pin(apic, pin)
 			ioapics[apic].saved_registers[pin] =
 				ioapic_read_entry(apic, pin);
 	}
@@ -699,11 +756,11 @@
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers)
 			continue;
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
+		for_each_pin(apic, pin) {
 			struct IO_APIC_route_entry entry;
 
 			entry = ioapics[apic].saved_registers[pin];
@@ -722,11 +779,11 @@
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers)
 			continue;
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
+		for_each_pin(apic, pin)
 			ioapic_write_entry(apic, pin,
 					   ioapics[apic].saved_registers[pin]);
 	}
@@ -785,7 +842,7 @@
 	if (i < mp_irq_entries) {
 		int ioapic_idx;
 
-		for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+		for_each_ioapic(ioapic_idx)
 			if (mpc_ioapic_id(ioapic_idx) == mp_irqs[i].dstapic)
 				return ioapic_idx;
 	}
@@ -799,7 +856,7 @@
  */
 static int EISA_ELCR(unsigned int irq)
 {
-	if (irq < legacy_pic->nr_legacy_irqs) {
+	if (irq < nr_legacy_irqs()) {
 		unsigned int port = 0x4d0 + (irq >> 3);
 		return (inb(port) >> (irq & 7)) & 1;
 	}
@@ -939,11 +996,94 @@
 	return trigger;
 }
 
-static int pin_2_irq(int idx, int apic, int pin)
+static int alloc_irq_from_domain(struct irq_domain *domain, u32 gsi, int pin)
+{
+	int irq = -1;
+	int ioapic = (int)(long)domain->host_data;
+	int type = ioapics[ioapic].irqdomain_cfg.type;
+
+	switch (type) {
+	case IOAPIC_DOMAIN_LEGACY:
+		/*
+		 * Dynamically allocate IRQ number for non-ISA IRQs in the first 16
+		 * GSIs on some weird platforms.
+		 */
+		if (gsi < nr_legacy_irqs())
+			irq = irq_create_mapping(domain, pin);
+		else if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0)
+			irq = gsi;
+		break;
+	case IOAPIC_DOMAIN_STRICT:
+		if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0)
+			irq = gsi;
+		break;
+	case IOAPIC_DOMAIN_DYNAMIC:
+		irq = irq_create_mapping(domain, pin);
+		break;
+	default:
+		WARN(1, "ioapic: unknown irqdomain type %d\n", type);
+		break;
+	}
+
+	return irq > 0 ? irq : -1;
+}
+
+static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin,
+			     unsigned int flags)
 {
 	int irq;
-	int bus = mp_irqs[idx].srcbus;
-	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(apic);
+	struct irq_domain *domain = mp_ioapic_irqdomain(ioapic);
+	struct mp_pin_info *info = mp_pin_info(ioapic, pin);
+
+	if (!domain)
+		return -1;
+
+	mutex_lock(&ioapic_mutex);
+
+	/*
+	 * Don't use irqdomain to manage ISA IRQs because there may be
+	 * multiple IOAPIC pins sharing the same ISA IRQ number and
+	 * irqdomain only supports 1:1 mapping between IOAPIC pin and
+	 * IRQ number. A typical IOAPIC has 24 pins, pin 0-15 are used
+	 * for legacy IRQs and pin 16-23 are used for PCI IRQs (PIRQ A-H).
+	 * When ACPI is disabled, only legacy IRQ numbers (IRQ0-15) are
+	 * available, and some BIOSes may use MP Interrupt Source records
+	 * to override IRQ numbers for PIRQs instead of reprogramming
+	 * the interrupt routing logic. Thus there may be multiple pins
+	 * sharing the same legacy IRQ number when ACPI is disabled.
+	 */
+	if (idx >= 0 && test_bit(mp_irqs[idx].srcbus, mp_bus_not_pci)) {
+		irq = mp_irqs[idx].srcbusirq;
+		if (flags & IOAPIC_MAP_ALLOC) {
+			if (info->count == 0 &&
+			    mp_irqdomain_map(domain, irq, pin) != 0)
+				irq = -1;
+
+			/* special handling for timer IRQ0 */
+			if (irq == 0)
+				info->count++;
+		}
+	} else {
+		irq = irq_find_mapping(domain, pin);
+		if (irq <= 0 && (flags & IOAPIC_MAP_ALLOC))
+			irq = alloc_irq_from_domain(domain, gsi, pin);
+	}
+
+	if (flags & IOAPIC_MAP_ALLOC) {
+		if (irq > 0)
+			info->count++;
+		else if (info->count == 0)
+			info->set = 0;
+	}
+
+	mutex_unlock(&ioapic_mutex);
+
+	return irq > 0 ? irq : -1;
+}
+
+static int pin_2_irq(int idx, int ioapic, int pin, unsigned int flags)
+{
+	u32 gsi = mp_pin_to_gsi(ioapic, pin);
 
 	/*
 	 * Debugging check, we are in big trouble if this message pops up!
@@ -951,17 +1091,6 @@
 	if (mp_irqs[idx].dstirq != pin)
 		pr_err("broken BIOS or MPTABLE parser, ayiee!!\n");
 
-	if (test_bit(bus, mp_bus_not_pci)) {
-		irq = mp_irqs[idx].srcbusirq;
-	} else {
-		u32 gsi = gsi_cfg->gsi_base + pin;
-
-		if (gsi >= NR_IRQS_LEGACY)
-			irq = gsi;
-		else
-			irq = gsi_top + gsi;
-	}
-
 #ifdef CONFIG_X86_32
 	/*
 	 * PCI IRQ command line redirection. Yes, limits are hardcoded.
@@ -972,16 +1101,58 @@
 				apic_printk(APIC_VERBOSE, KERN_DEBUG
 						"disabling PIRQ%d\n", pin-16);
 			} else {
-				irq = pirq_entries[pin-16];
+				int irq = pirq_entries[pin-16];
 				apic_printk(APIC_VERBOSE, KERN_DEBUG
 						"using PIRQ%d -> IRQ %d\n",
 						pin-16, irq);
+				return irq;
 			}
 		}
 	}
 #endif
 
-	return irq;
+	return  mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags);
+}
+
+int mp_map_gsi_to_irq(u32 gsi, unsigned int flags)
+{
+	int ioapic, pin, idx;
+
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return -1;
+
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+	idx = find_irq_entry(ioapic, pin, mp_INT);
+	if ((flags & IOAPIC_MAP_CHECK) && idx < 0)
+		return -1;
+
+	return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags);
+}
+
+void mp_unmap_irq(int irq)
+{
+	struct irq_data *data = irq_get_irq_data(irq);
+	struct mp_pin_info *info;
+	int ioapic, pin;
+
+	if (!data || !data->domain)
+		return;
+
+	ioapic = (int)(long)data->domain->host_data;
+	pin = (int)data->hwirq;
+	info = mp_pin_info(ioapic, pin);
+
+	mutex_lock(&ioapic_mutex);
+	if (--info->count == 0) {
+		info->set = 0;
+		if (irq < nr_legacy_irqs() &&
+		    ioapics[ioapic].irqdomain_cfg.type == IOAPIC_DOMAIN_LEGACY)
+			mp_irqdomain_unmap(data->domain, irq);
+		else
+			irq_dispose_mapping(irq);
+	}
+	mutex_unlock(&ioapic_mutex);
 }
 
 /*
@@ -991,7 +1162,7 @@
 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin,
 				struct io_apic_irq_attr *irq_attr)
 {
-	int ioapic_idx, i, best_guess = -1;
+	int irq, i, best_ioapic = -1, best_idx = -1;
 
 	apic_printk(APIC_DEBUG,
 		    "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
@@ -1001,44 +1172,56 @@
 			    "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
 		return -1;
 	}
+
 	for (i = 0; i < mp_irq_entries; i++) {
 		int lbus = mp_irqs[i].srcbus;
+		int ioapic_idx, found = 0;
 
-		for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+		if (bus != lbus || mp_irqs[i].irqtype != mp_INT ||
+		    slot != ((mp_irqs[i].srcbusirq >> 2) & 0x1f))
+			continue;
+
+		for_each_ioapic(ioapic_idx)
 			if (mpc_ioapic_id(ioapic_idx) == mp_irqs[i].dstapic ||
-			    mp_irqs[i].dstapic == MP_APIC_ALL)
+			    mp_irqs[i].dstapic == MP_APIC_ALL) {
+				found = 1;
 				break;
-
-		if (!test_bit(lbus, mp_bus_not_pci) &&
-		    !mp_irqs[i].irqtype &&
-		    (bus == lbus) &&
-		    (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) {
-			int irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq);
-
-			if (!(ioapic_idx || IO_APIC_IRQ(irq)))
-				continue;
-
-			if (pin == (mp_irqs[i].srcbusirq & 3)) {
-				set_io_apic_irq_attr(irq_attr, ioapic_idx,
-						     mp_irqs[i].dstirq,
-						     irq_trigger(i),
-						     irq_polarity(i));
-				return irq;
 			}
-			/*
-			 * Use the first all-but-pin matching entry as a
-			 * best-guess fuzzy result for broken mptables.
-			 */
-			if (best_guess < 0) {
-				set_io_apic_irq_attr(irq_attr, ioapic_idx,
-						     mp_irqs[i].dstirq,
-						     irq_trigger(i),
-						     irq_polarity(i));
-				best_guess = irq;
-			}
+		if (!found)
+			continue;
+
+		/* Skip ISA IRQs */
+		irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq, 0);
+		if (irq > 0 && !IO_APIC_IRQ(irq))
+			continue;
+
+		if (pin == (mp_irqs[i].srcbusirq & 3)) {
+			best_idx = i;
+			best_ioapic = ioapic_idx;
+			goto out;
+		}
+
+		/*
+		 * Use the first all-but-pin matching entry as a
+		 * best-guess fuzzy result for broken mptables.
+		 */
+		if (best_idx < 0) {
+			best_idx = i;
+			best_ioapic = ioapic_idx;
 		}
 	}
-	return best_guess;
+	if (best_idx < 0)
+		return -1;
+
+out:
+	irq = pin_2_irq(best_idx, best_ioapic, mp_irqs[best_idx].dstirq,
+			IOAPIC_MAP_ALLOC);
+	if (irq > 0)
+		set_io_apic_irq_attr(irq_attr, best_ioapic,
+				     mp_irqs[best_idx].dstirq,
+				     irq_trigger(best_idx),
+				     irq_polarity(best_idx));
+	return irq;
 }
 EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
 
@@ -1198,7 +1381,7 @@
 	raw_spin_lock(&vector_lock);
 	/* Mark the inuse vectors */
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 
@@ -1227,12 +1410,10 @@
 {
 	int apic, idx, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
-			idx = find_irq_entry(apic, pin, mp_INT);
-			if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
-				return irq_trigger(idx);
-		}
+	for_each_ioapic_pin(apic, pin) {
+		idx = find_irq_entry(apic, pin, mp_INT);
+		if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin, 0)))
+			return irq_trigger(idx);
 	}
 	/*
          * nonexistent IRQs are edge default
@@ -1330,95 +1511,29 @@
 	}
 
 	ioapic_register_intr(irq, cfg, attr->trigger);
-	if (irq < legacy_pic->nr_legacy_irqs)
+	if (irq < nr_legacy_irqs())
 		legacy_pic->mask(irq);
 
 	ioapic_write_entry(attr->ioapic, attr->ioapic_pin, entry);
 }
 
-static bool __init io_apic_pin_not_connected(int idx, int ioapic_idx, int pin)
-{
-	if (idx != -1)
-		return false;
-
-	apic_printk(APIC_VERBOSE, KERN_DEBUG " apic %d pin %d not connected\n",
-		    mpc_ioapic_id(ioapic_idx), pin);
-	return true;
-}
-
-static void __init __io_apic_setup_irqs(unsigned int ioapic_idx)
-{
-	int idx, node = cpu_to_node(0);
-	struct io_apic_irq_attr attr;
-	unsigned int pin, irq;
-
-	for (pin = 0; pin < ioapics[ioapic_idx].nr_registers; pin++) {
-		idx = find_irq_entry(ioapic_idx, pin, mp_INT);
-		if (io_apic_pin_not_connected(idx, ioapic_idx, pin))
-			continue;
-
-		irq = pin_2_irq(idx, ioapic_idx, pin);
-
-		if ((ioapic_idx > 0) && (irq > 16))
-			continue;
-
-		/*
-		 * Skip the timer IRQ if there's a quirk handler
-		 * installed and if it returns 1:
-		 */
-		if (apic->multi_timer_check &&
-		    apic->multi_timer_check(ioapic_idx, irq))
-			continue;
-
-		set_io_apic_irq_attr(&attr, ioapic_idx, pin, irq_trigger(idx),
-				     irq_polarity(idx));
-
-		io_apic_setup_irq_pin(irq, node, &attr);
-	}
-}
-
 static void __init setup_IO_APIC_irqs(void)
 {
-	unsigned int ioapic_idx;
+	unsigned int ioapic, pin;
+	int idx;
 
 	apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
 
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
-		__io_apic_setup_irqs(ioapic_idx);
-}
-
-/*
- * for the gsit that is not in first ioapic
- * but could not use acpi_register_gsi()
- * like some special sci in IBM x3330
- */
-void setup_IO_APIC_irq_extra(u32 gsi)
-{
-	int ioapic_idx = 0, pin, idx, irq, node = cpu_to_node(0);
-	struct io_apic_irq_attr attr;
-
-	/*
-	 * Convert 'gsi' to 'ioapic.pin'.
-	 */
-	ioapic_idx = mp_find_ioapic(gsi);
-	if (ioapic_idx < 0)
-		return;
-
-	pin = mp_find_ioapic_pin(ioapic_idx, gsi);
-	idx = find_irq_entry(ioapic_idx, pin, mp_INT);
-	if (idx == -1)
-		return;
-
-	irq = pin_2_irq(idx, ioapic_idx, pin);
-
-	/* Only handle the non legacy irqs on secondary ioapics */
-	if (ioapic_idx == 0 || irq < NR_IRQS_LEGACY)
-		return;
-
-	set_io_apic_irq_attr(&attr, ioapic_idx, pin, irq_trigger(idx),
-			     irq_polarity(idx));
-
-	io_apic_setup_irq_pin_once(irq, node, &attr);
+	for_each_ioapic_pin(ioapic, pin) {
+		idx = find_irq_entry(ioapic, pin, mp_INT);
+		if (idx < 0)
+			apic_printk(APIC_VERBOSE,
+				    KERN_DEBUG " apic %d pin %d not connected\n",
+				    mpc_ioapic_id(ioapic), pin);
+		else
+			pin_2_irq(idx, ioapic, pin,
+				  ioapic ? 0 : IOAPIC_MAP_ALLOC);
+	}
 }
 
 /*
@@ -1586,7 +1701,7 @@
 	struct irq_chip *chip;
 
 	printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+	for_each_ioapic(ioapic_idx)
 		printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
 		       mpc_ioapic_id(ioapic_idx),
 		       ioapics[ioapic_idx].nr_registers);
@@ -1597,7 +1712,7 @@
 	 */
 	printk(KERN_INFO "testing the IO APIC.......................\n");
 
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+	for_each_ioapic(ioapic_idx)
 		print_IO_APIC(ioapic_idx);
 
 	printk(KERN_DEBUG "IRQ to pin mappings:\n");
@@ -1608,7 +1723,7 @@
 		if (chip != &ioapic_chip)
 			continue;
 
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 		entry = cfg->irq_2_pin;
@@ -1758,7 +1873,7 @@
 	unsigned int v;
 	unsigned long flags;
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
 	printk(KERN_DEBUG "\nprinting PIC contents\n");
@@ -1828,26 +1943,22 @@
 void __init enable_IO_APIC(void)
 {
 	int i8259_apic, i8259_pin;
-	int apic;
+	int apic, pin;
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
-	for(apic = 0; apic < nr_ioapics; apic++) {
-		int pin;
+	for_each_ioapic_pin(apic, pin) {
 		/* See if any of the pins is in ExtINT mode */
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
-			struct IO_APIC_route_entry entry;
-			entry = ioapic_read_entry(apic, pin);
+		struct IO_APIC_route_entry entry = ioapic_read_entry(apic, pin);
 
-			/* If the interrupt line is enabled and in ExtInt mode
-			 * I have found the pin where the i8259 is connected.
-			 */
-			if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
-				ioapic_i8259.apic = apic;
-				ioapic_i8259.pin  = pin;
-				goto found_i8259;
-			}
+		/* If the interrupt line is enabled and in ExtInt mode
+		 * I have found the pin where the i8259 is connected.
+		 */
+		if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
+			ioapic_i8259.apic = apic;
+			ioapic_i8259.pin  = pin;
+			goto found_i8259;
 		}
 	}
  found_i8259:
@@ -1919,7 +2030,7 @@
 	 */
 	clear_IO_APIC();
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
 	x86_io_apic_ops.disable();
@@ -1950,7 +2061,7 @@
 	/*
 	 * Set the IOAPIC ID to the value stored in the MPC table.
 	 */
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++) {
+	for_each_ioapic(ioapic_idx) {
 		/* Read the register 0 value */
 		raw_spin_lock_irqsave(&ioapic_lock, flags);
 		reg_00.raw = io_apic_read(ioapic_idx, 0);
@@ -2123,7 +2234,7 @@
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&ioapic_lock, flags);
-	if (irq < legacy_pic->nr_legacy_irqs) {
+	if (irq < nr_legacy_irqs()) {
 		legacy_pic->mask(irq);
 		if (legacy_pic->irq_pending(irq))
 			was_pending = 1;
@@ -2225,7 +2336,7 @@
 			apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
 			goto unlock;
 		}
-		__this_cpu_write(vector_irq[vector], -1);
+		__this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED);
 unlock:
 		raw_spin_unlock(&desc->lock);
 	}
@@ -2253,7 +2364,7 @@
 
 void irq_force_complete_move(int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 
 	if (!cfg)
 		return;
@@ -2514,26 +2625,15 @@
 	struct irq_cfg *cfg;
 	unsigned int irq;
 
-	/*
-	 * NOTE! The local APIC isn't very good at handling
-	 * multiple interrupts at the same interrupt level.
-	 * As the interrupt level is determined by taking the
-	 * vector number and shifting that right by 4, we
-	 * want to spread these out a bit so that they don't
-	 * all fall in the same interrupt level.
-	 *
-	 * Also, we've got to be careful not to trash gate
-	 * 0x80, because int 0x80 is hm, kind of importantish. ;)
-	 */
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {
 			/*
 			 * Hmm.. We don't have an entry for this,
 			 * so default to an old-fashioned 8259
 			 * interrupt if we can..
 			 */
-			if (irq < legacy_pic->nr_legacy_irqs)
+			if (irq < nr_legacy_irqs())
 				legacy_pic->make_irq(irq);
 			else
 				/* Strange. Oh, well.. */
@@ -2649,8 +2749,6 @@
 }
 early_param("disable_timer_pin_1", disable_timer_pin_setup);
 
-int timer_through_8259 __initdata;
-
 /*
  * This code may look a bit paranoid, but it's supposed to cooperate with
  * a wide range of boards and BIOS bugs.  Fortunately only the timer IRQ
@@ -2661,7 +2759,7 @@
  */
 static inline void __init check_timer(void)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(0);
+	struct irq_cfg *cfg = irq_cfg(0);
 	int node = cpu_to_node(0);
 	int apic1, pin1, apic2, pin2;
 	unsigned long flags;
@@ -2755,7 +2853,6 @@
 		legacy_pic->unmask(0);
 		if (timer_irq_works()) {
 			apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
-			timer_through_8259 = 1;
 			goto out;
 		}
 		/*
@@ -2827,15 +2924,54 @@
  */
 #define PIC_IRQS	(1UL << PIC_CASCADE_IR)
 
+static int mp_irqdomain_create(int ioapic)
+{
+	size_t size;
+	int hwirqs = mp_ioapic_pin_count(ioapic);
+	struct ioapic *ip = &ioapics[ioapic];
+	struct ioapic_domain_cfg *cfg = &ip->irqdomain_cfg;
+	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic);
+
+	size = sizeof(struct mp_pin_info) * mp_ioapic_pin_count(ioapic);
+	ip->pin_info = kzalloc(size, GFP_KERNEL);
+	if (!ip->pin_info)
+		return -ENOMEM;
+
+	if (cfg->type == IOAPIC_DOMAIN_INVALID)
+		return 0;
+
+	ip->irqdomain = irq_domain_add_linear(cfg->dev, hwirqs, cfg->ops,
+					      (void *)(long)ioapic);
+	if(!ip->irqdomain) {
+		kfree(ip->pin_info);
+		ip->pin_info = NULL;
+		return -ENOMEM;
+	}
+
+	if (cfg->type == IOAPIC_DOMAIN_LEGACY ||
+	    cfg->type == IOAPIC_DOMAIN_STRICT)
+		ioapic_dynirq_base = max(ioapic_dynirq_base,
+					 gsi_cfg->gsi_end + 1);
+
+	if (gsi_cfg->gsi_base == 0)
+		irq_set_default_host(ip->irqdomain);
+
+	return 0;
+}
+
 void __init setup_IO_APIC(void)
 {
+	int ioapic;
 
 	/*
 	 * calling enable_IO_APIC() is moved to setup_local_APIC for BP
 	 */
-	io_apic_irqs = legacy_pic->nr_legacy_irqs ? ~PIC_IRQS : ~0UL;
+	io_apic_irqs = nr_legacy_irqs() ? ~PIC_IRQS : ~0UL;
 
 	apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
+	for_each_ioapic(ioapic)
+		BUG_ON(mp_irqdomain_create(ioapic));
+
 	/*
          * Set up IO-APIC IRQ routing.
          */
@@ -2844,8 +2980,10 @@
 	sync_Arb_IDs();
 	setup_IO_APIC_irqs();
 	init_IO_APIC_traps();
-	if (legacy_pic->nr_legacy_irqs)
+	if (nr_legacy_irqs())
 		check_timer();
+
+	ioapic_initialized = 1;
 }
 
 /*
@@ -2880,7 +3018,7 @@
 {
 	int ioapic_idx;
 
-	for (ioapic_idx = nr_ioapics - 1; ioapic_idx >= 0; ioapic_idx--)
+	for_each_ioapic_reverse(ioapic_idx)
 		resume_ioapic_id(ioapic_idx);
 
 	restore_ioapic_entries();
@@ -2926,7 +3064,7 @@
 
 void arch_teardown_hwirq(unsigned int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 	unsigned long flags;
 
 	free_remapped_irq(irq);
@@ -3053,7 +3191,7 @@
 	if (!irq_offset)
 		write_msi_msg(irq, &msg);
 
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 
@@ -3192,7 +3330,7 @@
 
 	hpet_msi_write(irq_get_handler_data(irq), &msg);
 	irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 	return 0;
@@ -3303,27 +3441,6 @@
 	return ret;
 }
 
-int io_apic_setup_irq_pin_once(unsigned int irq, int node,
-			       struct io_apic_irq_attr *attr)
-{
-	unsigned int ioapic_idx = attr->ioapic, pin = attr->ioapic_pin;
-	int ret;
-	struct IO_APIC_route_entry orig_entry;
-
-	/* Avoid redundant programming */
-	if (test_bit(pin, ioapics[ioapic_idx].pin_programmed)) {
-		pr_debug("Pin %d-%d already programmed\n", mpc_ioapic_id(ioapic_idx), pin);
-		orig_entry = ioapic_read_entry(attr->ioapic, pin);
-		if (attr->trigger == orig_entry.trigger && attr->polarity == orig_entry.polarity)
-			return 0;
-		return -EBUSY;
-	}
-	ret = io_apic_setup_irq_pin(irq, node, attr);
-	if (!ret)
-		set_bit(pin, ioapics[ioapic_idx].pin_programmed);
-	return ret;
-}
-
 static int __init io_apic_get_redir_entries(int ioapic)
 {
 	union IO_APIC_reg_01	reg_01;
@@ -3340,20 +3457,13 @@
 	return reg_01.bits.entries + 1;
 }
 
-static void __init probe_nr_irqs_gsi(void)
-{
-	int nr;
-
-	nr = gsi_top + NR_IRQS_LEGACY;
-	if (nr > nr_irqs_gsi)
-		nr_irqs_gsi = nr;
-
-	printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);
-}
-
 unsigned int arch_dynirq_lower_bound(unsigned int from)
 {
-	return from < nr_irqs_gsi ? nr_irqs_gsi : from;
+	/*
+	 * dmar_alloc_hwirq() may be called before setup_IO_APIC(), so use
+	 * gsi_top if ioapic_dynirq_base hasn't been initialized yet.
+	 */
+	return ioapic_initialized ? ioapic_dynirq_base : gsi_top;
 }
 
 int __init arch_probe_nr_irqs(void)
@@ -3363,33 +3473,17 @@
 	if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
 		nr_irqs = NR_VECTORS * nr_cpu_ids;
 
-	nr = nr_irqs_gsi + 8 * nr_cpu_ids;
+	nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids;
 #if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ)
 	/*
 	 * for MSI and HT dyn irq
 	 */
-	nr += nr_irqs_gsi * 16;
+	nr += gsi_top * 16;
 #endif
 	if (nr < nr_irqs)
 		nr_irqs = nr;
 
-	return NR_IRQS_LEGACY;
-}
-
-int io_apic_set_pci_routing(struct device *dev, int irq,
-			    struct io_apic_irq_attr *irq_attr)
-{
-	int node;
-
-	if (!IO_APIC_IRQ(irq)) {
-		apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
-			    irq_attr->ioapic);
-		return -EINVAL;
-	}
-
-	node = dev ? dev_to_node(dev) : cpu_to_node(0);
-
-	return io_apic_setup_irq_pin_once(irq, node, irq_attr);
+	return 0;
 }
 
 #ifdef CONFIG_X86_32
@@ -3483,9 +3577,8 @@
 	DECLARE_BITMAP(used, 256);
 
 	bitmap_zero(used, 256);
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i)
 		__set_bit(mpc_ioapic_id(i), used);
-	}
 	if (!test_bit(id, used))
 		return id;
 	return find_first_zero_bit(used, 256);
@@ -3543,14 +3636,13 @@
 	if (skip_ioapic_setup == 1)
 		return;
 
-	for (ioapic = 0; ioapic < nr_ioapics; ioapic++)
-	for (pin = 0; pin < ioapics[ioapic].nr_registers; pin++) {
+	for_each_ioapic_pin(ioapic, pin) {
 		irq_entry = find_irq_entry(ioapic, pin, mp_INT);
 		if (irq_entry == -1)
 			continue;
-		irq = pin_2_irq(irq_entry, ioapic, pin);
 
-		if ((ioapic > 0) && (irq > 16))
+		irq = pin_2_irq(irq_entry, ioapic, pin, 0);
+		if (irq < 0 || !mp_init_irq_at_boot(ioapic, irq))
 			continue;
 
 		idata = irq_get_irq_data(irq);
@@ -3573,29 +3665,33 @@
 
 static struct resource *ioapic_resources;
 
-static struct resource * __init ioapic_setup_resources(int nr_ioapics)
+static struct resource * __init ioapic_setup_resources(void)
 {
 	unsigned long n;
 	struct resource *res;
 	char *mem;
-	int i;
+	int i, num = 0;
 
-	if (nr_ioapics <= 0)
+	for_each_ioapic(i)
+		num++;
+	if (num == 0)
 		return NULL;
 
 	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
-	n *= nr_ioapics;
+	n *= num;
 
 	mem = alloc_bootmem(n);
 	res = (void *)mem;
 
-	mem += sizeof(struct resource) * nr_ioapics;
+	mem += sizeof(struct resource) * num;
 
-	for (i = 0; i < nr_ioapics; i++) {
-		res[i].name = mem;
-		res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	num = 0;
+	for_each_ioapic(i) {
+		res[num].name = mem;
+		res[num].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 		snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i);
 		mem += IOAPIC_RESOURCE_NAME_SIZE;
+		num++;
 	}
 
 	ioapic_resources = res;
@@ -3609,8 +3705,8 @@
 	struct resource *ioapic_res;
 	int i;
 
-	ioapic_res = ioapic_setup_resources(nr_ioapics);
-	for (i = 0; i < nr_ioapics; i++) {
+	ioapic_res = ioapic_setup_resources();
+	for_each_ioapic(i) {
 		if (smp_found_config) {
 			ioapic_phys = mpc_ioapic_addr(i);
 #ifdef CONFIG_X86_32
@@ -3641,8 +3737,6 @@
 		ioapic_res->end = ioapic_phys + IO_APIC_SLOT_SIZE - 1;
 		ioapic_res++;
 	}
-
-	probe_nr_irqs_gsi();
 }
 
 void __init ioapic_insert_resources(void)
@@ -3657,7 +3751,7 @@
 		return;
 	}
 
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		insert_resource(&iomem_resource, r);
 		r++;
 	}
@@ -3665,16 +3759,15 @@
 
 int mp_find_ioapic(u32 gsi)
 {
-	int i = 0;
+	int i;
 
 	if (nr_ioapics == 0)
 		return -1;
 
 	/* Find the IOAPIC that manages this GSI. */
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(i);
-		if ((gsi >= gsi_cfg->gsi_base)
-		    && (gsi <= gsi_cfg->gsi_end))
+		if (gsi >= gsi_cfg->gsi_base && gsi <= gsi_cfg->gsi_end)
 			return i;
 	}
 
@@ -3686,7 +3779,7 @@
 {
 	struct mp_ioapic_gsi *gsi_cfg;
 
-	if (WARN_ON(ioapic == -1))
+	if (WARN_ON(ioapic < 0))
 		return -1;
 
 	gsi_cfg = mp_ioapic_gsi_routing(ioapic);
@@ -3729,7 +3822,8 @@
 	return 0;
 }
 
-void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
+void __init mp_register_ioapic(int id, u32 address, u32 gsi_base,
+			       struct ioapic_domain_cfg *cfg)
 {
 	int idx = 0;
 	int entries;
@@ -3743,6 +3837,8 @@
 	ioapics[idx].mp_config.type = MP_IOAPIC;
 	ioapics[idx].mp_config.flags = MPC_APIC_USABLE;
 	ioapics[idx].mp_config.apicaddr = address;
+	ioapics[idx].irqdomain = NULL;
+	ioapics[idx].irqdomain_cfg = *cfg;
 
 	set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
 
@@ -3779,6 +3875,77 @@
 	nr_ioapics++;
 }
 
+int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
+		     irq_hw_number_t hwirq)
+{
+	int ioapic = (int)(long)domain->host_data;
+	struct mp_pin_info *info = mp_pin_info(ioapic, hwirq);
+	struct io_apic_irq_attr attr;
+
+	/* Get default attribute if not set by caller yet */
+	if (!info->set) {
+		u32 gsi = mp_pin_to_gsi(ioapic, hwirq);
+
+		if (acpi_get_override_irq(gsi, &info->trigger,
+					  &info->polarity) < 0) {
+			/*
+			 * PCI interrupts are always polarity one level
+			 * triggered.
+			 */
+			info->trigger = 1;
+			info->polarity = 1;
+		}
+		info->node = NUMA_NO_NODE;
+		info->set = 1;
+	}
+	set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger,
+			     info->polarity);
+
+	return io_apic_setup_irq_pin(virq, info->node, &attr);
+}
+
+void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq)
+{
+	struct irq_data *data = irq_get_irq_data(virq);
+	struct irq_cfg *cfg = irq_cfg(virq);
+	int ioapic = (int)(long)domain->host_data;
+	int pin = (int)data->hwirq;
+
+	ioapic_mask_entry(ioapic, pin);
+	__remove_pin_from_irq(cfg, ioapic, pin);
+	WARN_ON(cfg->irq_2_pin != NULL);
+	arch_teardown_hwirq(virq);
+}
+
+int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node)
+{
+	int ret = 0;
+	int ioapic, pin;
+	struct mp_pin_info *info;
+
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return -ENODEV;
+
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+	info = mp_pin_info(ioapic, pin);
+	trigger = trigger ? 1 : 0;
+	polarity = polarity ? 1 : 0;
+
+	mutex_lock(&ioapic_mutex);
+	if (!info->set) {
+		info->trigger = trigger;
+		info->polarity = polarity;
+		info->node = node;
+		info->set = 1;
+	} else if (info->trigger != trigger || info->polarity != polarity) {
+		ret = -EBUSY;
+	}
+	mutex_unlock(&ioapic_mutex);
+
+	return ret;
+}
+
 /* Enable IOAPIC early just for system timer */
 void __init pre_init_apic_IRQ0(void)
 {
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index cceb352..bda4886 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -88,21 +88,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= default_check_apicid_used,
-	.check_apicid_present		= default_check_apicid_present,
 
 	.vector_allocation_domain	= flat_vector_allocation_domain,
 	.init_apic_ldr			= default_init_apic_ldr,
 
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
 	.setup_apic_routing		= setup_apic_flat_routing,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= default_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= default_get_apic_id,
 	.set_apic_id			= NULL,
@@ -116,11 +111,7 @@
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= true,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
@@ -214,29 +205,7 @@
 	printk(KERN_INFO "Using APIC driver %s\n", apic->name);
 }
 
-/* These functions can switch the APIC even after the initial ->probe() */
-
-int __init
-generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
-{
-	struct apic **drv;
-
-	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
-		if (!((*drv)->mps_oem_check))
-			continue;
-		if (!(*drv)->mps_oem_check(mpc, oem, productid))
-			continue;
-
-		if (!cmdline_apic) {
-			apic = *drv;
-			printk(KERN_INFO "Switched to APIC driver `%s'.\n",
-			       apic->name);
-		}
-		return 1;
-	}
-	return 0;
-}
-
+/* This function can switch the APIC even after the initial ->probe() */
 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
 	struct apic **drv;
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index e66766b..6ce600f 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -249,21 +249,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= cluster_vector_allocation_domain,
 	.init_apic_ldr			= init_x2apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= x2apic_set_apic_id,
@@ -277,10 +272,7 @@
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index 6d600eb..6fae733 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -103,21 +103,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= init_x2apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= x2apic_set_apic_id,
@@ -131,10 +126,7 @@
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 293b41d..004f017 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -365,21 +365,16 @@
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= uv_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= uv_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -394,10 +389,7 @@
 	.send_IPI_self			= uv_send_IPI_self,
 
 	.wakeup_secondary_cpu		= uv_wakeup_secondary,
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 333fd52..e4ab2b4 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -148,6 +148,7 @@
 {
 	setup_clear_cpu_cap(X86_FEATURE_XSAVE);
 	setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
+	setup_clear_cpu_cap(X86_FEATURE_XSAVES);
 	setup_clear_cpu_cap(X86_FEATURE_AVX);
 	setup_clear_cpu_cap(X86_FEATURE_AVX2);
 	return 1;
@@ -161,6 +162,13 @@
 }
 __setup("noxsaveopt", x86_xsaveopt_setup);
 
+static int __init x86_xsaves_setup(char *s)
+{
+	setup_clear_cpu_cap(X86_FEATURE_XSAVES);
+	return 1;
+}
+__setup("noxsaves", x86_xsaves_setup);
+
 #ifdef CONFIG_X86_32
 static int cachesize_override = -1;
 static int disable_x86_serial_nr = 1;
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 7db54b5..3d35033 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -21,6 +21,7 @@
 #include <asm/apic.h>
 #include <asm/pci_x86.h>
 #include <asm/setup.h>
+#include <asm/i8259.h>
 
 __initdata u64 initial_dtb;
 char __initdata cmd_line[COMMAND_LINE_SIZE];
@@ -165,10 +166,79 @@
 #ifdef CONFIG_X86_IO_APIC
 static unsigned int ioapic_id;
 
+struct of_ioapic_type {
+	u32 out_type;
+	u32 trigger;
+	u32 polarity;
+};
+
+static struct of_ioapic_type of_ioapic_type[] =
+{
+	{
+		.out_type	= IRQ_TYPE_EDGE_RISING,
+		.trigger	= IOAPIC_EDGE,
+		.polarity	= 1,
+	},
+	{
+		.out_type	= IRQ_TYPE_LEVEL_LOW,
+		.trigger	= IOAPIC_LEVEL,
+		.polarity	= 0,
+	},
+	{
+		.out_type	= IRQ_TYPE_LEVEL_HIGH,
+		.trigger	= IOAPIC_LEVEL,
+		.polarity	= 1,
+	},
+	{
+		.out_type	= IRQ_TYPE_EDGE_FALLING,
+		.trigger	= IOAPIC_EDGE,
+		.polarity	= 0,
+	},
+};
+
+static int ioapic_xlate(struct irq_domain *domain,
+			struct device_node *controller,
+			const u32 *intspec, u32 intsize,
+			irq_hw_number_t *out_hwirq, u32 *out_type)
+{
+	struct of_ioapic_type *it;
+	u32 line, idx, gsi;
+
+	if (WARN_ON(intsize < 2))
+		return -EINVAL;
+
+	line = intspec[0];
+
+	if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
+		return -EINVAL;
+
+	it = &of_ioapic_type[intspec[1]];
+
+	idx = (u32)(long)domain->host_data;
+	gsi = mp_pin_to_gsi(idx, line);
+	if (mp_set_gsi_attr(gsi, it->trigger, it->polarity, cpu_to_node(0)))
+		return -EBUSY;
+
+	*out_hwirq = line;
+	*out_type = it->out_type;
+	return 0;
+}
+
+const struct irq_domain_ops ioapic_irq_domain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
+	.xlate = ioapic_xlate,
+};
+
 static void __init dtb_add_ioapic(struct device_node *dn)
 {
 	struct resource r;
 	int ret;
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_DYNAMIC,
+		.ops = &ioapic_irq_domain_ops,
+		.dev = dn,
+	};
 
 	ret = of_address_to_resource(dn, 0, &r);
 	if (ret) {
@@ -176,7 +246,7 @@
 				dn->full_name);
 		return;
 	}
-	mp_register_ioapic(++ioapic_id, r.start, gsi_top);
+	mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
 }
 
 static void __init dtb_ioapic_setup(void)
@@ -238,148 +308,3 @@
 	dtb_setup_hpet();
 	dtb_apic_setup();
 }
-
-#ifdef CONFIG_X86_IO_APIC
-
-struct of_ioapic_type {
-	u32 out_type;
-	u32 trigger;
-	u32 polarity;
-};
-
-static struct of_ioapic_type of_ioapic_type[] =
-{
-	{
-		.out_type	= IRQ_TYPE_EDGE_RISING,
-		.trigger	= IOAPIC_EDGE,
-		.polarity	= 1,
-	},
-	{
-		.out_type	= IRQ_TYPE_LEVEL_LOW,
-		.trigger	= IOAPIC_LEVEL,
-		.polarity	= 0,
-	},
-	{
-		.out_type	= IRQ_TYPE_LEVEL_HIGH,
-		.trigger	= IOAPIC_LEVEL,
-		.polarity	= 1,
-	},
-	{
-		.out_type	= IRQ_TYPE_EDGE_FALLING,
-		.trigger	= IOAPIC_EDGE,
-		.polarity	= 0,
-	},
-};
-
-static int ioapic_xlate(struct irq_domain *domain,
-			struct device_node *controller,
-			const u32 *intspec, u32 intsize,
-			irq_hw_number_t *out_hwirq, u32 *out_type)
-{
-	struct io_apic_irq_attr attr;
-	struct of_ioapic_type *it;
-	u32 line, idx;
-	int rc;
-
-	if (WARN_ON(intsize < 2))
-		return -EINVAL;
-
-	line = intspec[0];
-
-	if (intspec[1] >= ARRAY_SIZE(of_ioapic_type))
-		return -EINVAL;
-
-	it = &of_ioapic_type[intspec[1]];
-
-	idx = (u32) domain->host_data;
-	set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
-
-	rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
-					cpu_to_node(0), &attr);
-	if (rc)
-		return rc;
-
-	*out_hwirq = line;
-	*out_type = it->out_type;
-	return 0;
-}
-
-const struct irq_domain_ops ioapic_irq_domain_ops = {
-	.xlate = ioapic_xlate,
-};
-
-static void dt_add_ioapic_domain(unsigned int ioapic_num,
-		struct device_node *np)
-{
-	struct irq_domain *id;
-	struct mp_ioapic_gsi *gsi_cfg;
-	int ret;
-	int num;
-
-	gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
-	num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
-
-	id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
-			(void *)ioapic_num);
-	BUG_ON(!id);
-	if (gsi_cfg->gsi_base == 0) {
-		/*
-		 * The first NR_IRQS_LEGACY irq descs are allocated in
-		 * early_irq_init() and need just a mapping. The
-		 * remaining irqs need both. All of them are preallocated
-		 * and assigned so we can keep the 1:1 mapping which the ioapic
-		 * is having.
-		 */
-		irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
-
-		if (num > NR_IRQS_LEGACY) {
-			ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
-					NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
-			if (ret)
-				pr_err("Error creating mapping for the "
-						"remaining IRQs: %d\n", ret);
-		}
-		irq_set_default_host(id);
-	} else {
-		ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
-		if (ret)
-			pr_err("Error creating IRQ mapping: %d\n", ret);
-	}
-}
-
-static void __init ioapic_add_ofnode(struct device_node *np)
-{
-	struct resource r;
-	int i, ret;
-
-	ret = of_address_to_resource(np, 0, &r);
-	if (ret) {
-		printk(KERN_ERR "Failed to obtain address for %s\n",
-				np->full_name);
-		return;
-	}
-
-	for (i = 0; i < nr_ioapics; i++) {
-		if (r.start == mpc_ioapic_addr(i)) {
-			dt_add_ioapic_domain(i, np);
-			return;
-		}
-	}
-	printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
-}
-
-void __init x86_add_irq_domains(void)
-{
-	struct device_node *dp;
-
-	if (!of_have_populated_dt())
-		return;
-
-	for_each_node_with_property(dp, "interrupt-controller") {
-		if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
-			ioapic_add_ofnode(dp);
-	}
-}
-#else
-void __init x86_add_irq_domains(void) { }
-#endif
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index d5dd808..a9a4229 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -375,7 +375,7 @@
 	/*
 	 * These bits must be zero.
 	 */
-	xsave_hdr->reserved1[0] = xsave_hdr->reserved1[1] = 0;
+	memset(xsave_hdr->reserved, 0, 48);
 
 	return ret;
 }
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 7f50156..1e6cff5 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -78,7 +78,7 @@
 #endif
 	legacy_pic->init(0);
 
-	for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
+	for (i = 0; i < nr_legacy_irqs(); i++)
 		irq_set_chip_and_handler_name(i, chip, handle_level_irq, name);
 }
 
@@ -87,12 +87,6 @@
 	int i;
 
 	/*
-	 * We probably need a better place for this, but it works for
-	 * now ...
-	 */
-	x86_add_irq_domains();
-
-	/*
 	 * On cpu 0, Assign IRQ0_VECTOR..IRQ15_VECTOR's to IRQ 0..15.
 	 * If these IRQ's are handled by legacy interrupt-controllers like PIC,
 	 * then this configuration will likely be static after the boot. If
@@ -100,7 +94,7 @@
 	 * then this vector space can be freed and re-used dynamically as the
 	 * irq's migrate etc.
 	 */
-	for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
+	for (i = 0; i < nr_legacy_irqs(); i++)
 		per_cpu(vector_irq, 0)[IRQ0_VECTOR + i] = i;
 
 	x86_init.irqs.intr_init();
@@ -121,7 +115,7 @@
 	 * legacy PIC, for the new cpu that is coming online, setup the static
 	 * legacy vector to irq mapping:
 	 */
-	for (irq = 0; irq < legacy_pic->nr_legacy_irqs; irq++)
+	for (irq = 0; irq < nr_legacy_irqs(); irq++)
 		per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
 #endif
 
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index d2b5648..2d2a237 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/smp.h>
 #include <linux/pci.h>
+#include <linux/irqdomain.h>
 
 #include <asm/mtrr.h>
 #include <asm/mpspec.h>
@@ -67,7 +68,7 @@
 		boot_cpu_physical_apicid = m->apicid;
 	}
 
-	printk(KERN_INFO "Processor #%d%s\n", m->apicid, bootup_cpu);
+	pr_info("Processor #%d%s\n", m->apicid, bootup_cpu);
 	generic_processor_info(apicid, m->apicver);
 }
 
@@ -87,9 +88,8 @@
 
 #if MAX_MP_BUSSES < 256
 	if (m->busid >= MAX_MP_BUSSES) {
-		printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
-		       " is too large, max. supported is %d\n",
-		       m->busid, str, MAX_MP_BUSSES - 1);
+		pr_warn("MP table busid value (%d) for bustype %s is too large, max. supported is %d\n",
+			m->busid, str, MAX_MP_BUSSES - 1);
 		return;
 	}
 #endif
@@ -110,19 +110,29 @@
 		mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
 #endif
 	} else
-		printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
+		pr_warn("Unknown bustype %s - ignoring\n", str);
 }
 
+static struct irq_domain_ops mp_ioapic_irqdomain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
+};
+
 static void __init MP_ioapic_info(struct mpc_ioapic *m)
 {
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_LEGACY,
+		.ops = &mp_ioapic_irqdomain_ops,
+	};
+
 	if (m->flags & MPC_APIC_USABLE)
-		mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
+		mp_register_ioapic(m->apicid, m->apicaddr, gsi_top, &cfg);
 }
 
 static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
 {
-	apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
-		" IRQ %02x, APIC ID %x, APIC INT %02x\n",
+	apic_printk(APIC_VERBOSE,
+		"Int: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC INT %02x\n",
 		mp_irq->irqtype, mp_irq->irqflag & 3,
 		(mp_irq->irqflag >> 2) & 3, mp_irq->srcbus,
 		mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
@@ -135,8 +145,8 @@
 
 static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
 {
-	apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
-		" IRQ %02x, APIC ID %x, APIC LINT %02x\n",
+	apic_printk(APIC_VERBOSE,
+		"Lint: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC LINT %02x\n",
 		m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid,
 		m->srcbusirq, m->destapic, m->destapiclint);
 }
@@ -148,34 +158,33 @@
 {
 
 	if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) {
-		printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
+		pr_err("MPTABLE: bad signature [%c%c%c%c]!\n",
 		       mpc->signature[0], mpc->signature[1],
 		       mpc->signature[2], mpc->signature[3]);
 		return 0;
 	}
 	if (mpf_checksum((unsigned char *)mpc, mpc->length)) {
-		printk(KERN_ERR "MPTABLE: checksum error!\n");
+		pr_err("MPTABLE: checksum error!\n");
 		return 0;
 	}
 	if (mpc->spec != 0x01 && mpc->spec != 0x04) {
-		printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
-		       mpc->spec);
+		pr_err("MPTABLE: bad table version (%d)!!\n", mpc->spec);
 		return 0;
 	}
 	if (!mpc->lapic) {
-		printk(KERN_ERR "MPTABLE: null local APIC address!\n");
+		pr_err("MPTABLE: null local APIC address!\n");
 		return 0;
 	}
 	memcpy(oem, mpc->oem, 8);
 	oem[8] = 0;
-	printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
+	pr_info("MPTABLE: OEM ID: %s\n", oem);
 
 	memcpy(str, mpc->productid, 12);
 	str[12] = 0;
 
-	printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
+	pr_info("MPTABLE: Product ID: %s\n", str);
 
-	printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic);
+	pr_info("MPTABLE: APIC at: 0x%X\n", mpc->lapic);
 
 	return 1;
 }
@@ -188,8 +197,8 @@
 
 static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
 {
-	printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n"
-		"type %x\n", *mpt);
+	pr_err("Your mptable is wrong, contact your HW vendor!\n");
+	pr_cont("type %x\n", *mpt);
 	print_hex_dump(KERN_ERR, "  ", DUMP_PREFIX_ADDRESS, 16,
 			1, mpc, mpc->length, 1);
 }
@@ -207,9 +216,6 @@
 	if (!smp_check_mpc(mpc, oem, str))
 		return 0;
 
-#ifdef CONFIG_X86_32
-	generic_mps_oem_check(mpc, oem, str);
-#endif
 	/* Initialize the lapic mapping */
 	if (!acpi_lapic)
 		register_lapic_address(mpc->lapic);
@@ -259,7 +265,7 @@
 	}
 
 	if (!num_processors)
-		printk(KERN_ERR "MPTABLE: no processors registered!\n");
+		pr_err("MPTABLE: no processors registered!\n");
 	return num_processors;
 }
 
@@ -295,16 +301,13 @@
 	 *  If it does, we assume it's valid.
 	 */
 	if (mpc_default_type == 5) {
-		printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
-		       "falling back to ELCR\n");
+		pr_info("ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
 
 		if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
 		    ELCR_trigger(13))
-			printk(KERN_ERR "ELCR contains invalid data... "
-			       "not using ELCR\n");
+			pr_err("ELCR contains invalid data... not using ELCR\n");
 		else {
-			printk(KERN_INFO
-			       "Using ELCR to identify PCI interrupts\n");
+			pr_info("Using ELCR to identify PCI interrupts\n");
 			ELCR_fallback = 1;
 		}
 	}
@@ -353,7 +356,7 @@
 	bus.busid = 0;
 	switch (mpc_default_type) {
 	default:
-		printk(KERN_ERR "???\nUnknown standard configuration %d\n",
+		pr_err("???\nUnknown standard configuration %d\n",
 		       mpc_default_type);
 		/* fall through */
 	case 1:
@@ -462,8 +465,8 @@
 #ifdef CONFIG_X86_LOCAL_APIC
 		smp_found_config = 0;
 #endif
-		printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"
-			"... disabling SMP support. (tell your hw vendor)\n");
+		pr_err("BIOS bug, MP table errors detected!...\n");
+		pr_cont("... disabling SMP support. (tell your hw vendor)\n");
 		early_iounmap(mpc, size);
 		return -1;
 	}
@@ -481,8 +484,7 @@
 	if (!mp_irq_entries) {
 		struct mpc_bus bus;
 
-		printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
-		       "using default mptable. (tell your hw vendor)\n");
+		pr_err("BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
 
 		bus.type = MP_BUS;
 		bus.busid = 0;
@@ -516,14 +518,14 @@
 	if (acpi_lapic && acpi_ioapic)
 		return;
 
-	printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
-	       mpf->specification);
+	pr_info("Intel MultiProcessor Specification v1.%d\n",
+		mpf->specification);
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
 	if (mpf->feature2 & (1 << 7)) {
-		printk(KERN_INFO "    IMCR and PIC compatibility mode.\n");
+		pr_info("    IMCR and PIC compatibility mode.\n");
 		pic_mode = 1;
 	} else {
-		printk(KERN_INFO "    Virtual Wire compatibility mode.\n");
+		pr_info("    Virtual Wire compatibility mode.\n");
 		pic_mode = 0;
 	}
 #endif
@@ -539,8 +541,7 @@
 			return;
 		}
 
-		printk(KERN_INFO "Default MP configuration #%d\n",
-		       mpf->feature1);
+		pr_info("Default MP configuration #%d\n", mpf->feature1);
 		construct_default_ISA_mptable(mpf->feature1);
 
 	} else if (mpf->physptr) {
@@ -550,7 +551,7 @@
 		BUG();
 
 	if (!early)
-		printk(KERN_INFO "Processors: %d\n", num_processors);
+		pr_info("Processors: %d\n", num_processors);
 	/*
 	 * Only use the first configuration found.
 	 */
@@ -583,10 +584,10 @@
 #endif
 			mpf_found = mpf;
 
-			printk(KERN_INFO "found SMP MP-table at [mem %#010llx-%#010llx] mapped at [%p]\n",
-			       (unsigned long long) virt_to_phys(mpf),
-			       (unsigned long long) virt_to_phys(mpf) +
-			       sizeof(*mpf) - 1, mpf);
+			pr_info("found SMP MP-table at [mem %#010llx-%#010llx] mapped at [%p]\n",
+				(unsigned long long) virt_to_phys(mpf),
+				(unsigned long long) virt_to_phys(mpf) +
+				sizeof(*mpf) - 1, mpf);
 
 			mem = virt_to_phys(mpf);
 			memblock_reserve(mem, sizeof(*mpf));
@@ -735,7 +736,7 @@
 	int nr_m_spare = 0;
 	unsigned char *mpt = ((unsigned char *)mpc) + count;
 
-	printk(KERN_INFO "mpc_length %x\n", mpc->length);
+	pr_info("mpc_length %x\n", mpc->length);
 	while (count < mpc->length) {
 		switch (*mpt) {
 		case MP_PROCESSOR:
@@ -862,13 +863,13 @@
 	if (!smp_check_mpc(mpc, oem, str))
 		return 0;
 
-	printk(KERN_INFO "mpf: %llx\n", (u64)virt_to_phys(mpf));
-	printk(KERN_INFO "physptr: %x\n", mpf->physptr);
+	pr_info("mpf: %llx\n", (u64)virt_to_phys(mpf));
+	pr_info("physptr: %x\n", mpf->physptr);
 
 	if (mpc_new_phys && mpc->length > mpc_new_length) {
 		mpc_new_phys = 0;
-		printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
-			 mpc_new_length);
+		pr_info("mpc_new_length is %ld, please use alloc_mptable=8k\n",
+			mpc_new_length);
 	}
 
 	if (!mpc_new_phys) {
@@ -879,10 +880,10 @@
 		mpc->checksum = 0xff;
 		new = mpf_checksum((unsigned char *)mpc, mpc->length);
 		if (old == new) {
-			printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
+			pr_info("mpc is readonly, please try alloc_mptable instead\n");
 			return 0;
 		}
-		printk(KERN_INFO "use in-position replacing\n");
+		pr_info("use in-position replacing\n");
 	} else {
 		mpf->physptr = mpc_new_phys;
 		mpc_new = phys_to_virt(mpc_new_phys);
@@ -892,7 +893,7 @@
 		if (mpc_new_phys - mpf->physptr) {
 			struct mpf_intel *mpf_new;
 			/* steal 16 bytes from [0, 1k) */
-			printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
+			pr_info("mpf new: %x\n", 0x400 - 16);
 			mpf_new = phys_to_virt(0x400 - 16);
 			memcpy(mpf_new, mpf, 16);
 			mpf = mpf_new;
@@ -900,7 +901,7 @@
 		}
 		mpf->checksum = 0;
 		mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16);
-		printk(KERN_INFO "physptr new: %x\n", mpf->physptr);
+		pr_info("physptr new: %x\n", mpf->physptr);
 	}
 
 	/*
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 4505e2a..f804dc9 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -93,6 +93,7 @@
         	kmem_cache_create("task_xstate", xstate_size,
 				  __alignof__(union thread_xstate),
 				  SLAB_PANIC | SLAB_NOTRACK, NULL);
+	setup_xstate_comp();
 }
 
 /*
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 5492798..2d872e0 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -168,10 +168,6 @@
 	 * CPU, first the APIC. (this is probably redundant on most
 	 * boards)
 	 */
-
-	pr_debug("CALLIN, before setup_local_APIC()\n");
-	if (apic->smp_callin_clear_local_apic)
-		apic->smp_callin_clear_local_apic();
 	setup_local_APIC();
 	end_local_APIC_setup();
 
@@ -1143,10 +1139,6 @@
 		enable_IO_APIC();
 
 	bsp_end_local_APIC_setup();
-
-	if (apic->setup_portio_remap)
-		apic->setup_portio_remap();
-
 	smpboot_setup_io_apic();
 	/*
 	 * Set up local APIC timer on boot CPU.
diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index b99b9ad..ee22c1d 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -152,7 +152,7 @@
 		is_vsmp = 1;
 }
 
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	if (is_vsmp != -1)
 		return is_vsmp;
@@ -166,7 +166,7 @@
 static void __init detect_vsmp_box(void)
 {
 }
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	return 0;
 }
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c
index a4b451c..940b142 100644
--- a/arch/x86/kernel/xsave.c
+++ b/arch/x86/kernel/xsave.c
@@ -8,6 +8,7 @@
 
 #include <linux/bootmem.h>
 #include <linux/compat.h>
+#include <linux/cpu.h>
 #include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/sigframe.h>
@@ -24,7 +25,9 @@
 struct xsave_struct *init_xstate_buf;
 
 static struct _fpx_sw_bytes fx_sw_reserved, fx_sw_reserved_ia32;
-static unsigned int *xstate_offsets, *xstate_sizes, xstate_features;
+static unsigned int *xstate_offsets, *xstate_sizes;
+static unsigned int xstate_comp_offsets[sizeof(pcntxt_mask)*8];
+static unsigned int xstate_features;
 
 /*
  * If a processor implementation discern that a processor state component is
@@ -283,7 +286,7 @@
 
 	if (use_xsave()) {
 		/* These bits must be zero. */
-		xsave_hdr->reserved1[0] = xsave_hdr->reserved1[1] = 0;
+		memset(xsave_hdr->reserved, 0, 48);
 
 		/*
 		 * Init the state that is not present in the memory
@@ -479,6 +482,52 @@
 }
 
 /*
+ * This function sets up offsets and sizes of all extended states in
+ * xsave area. This supports both standard format and compacted format
+ * of the xsave aread.
+ *
+ * Input: void
+ * Output: void
+ */
+void setup_xstate_comp(void)
+{
+	unsigned int xstate_comp_sizes[sizeof(pcntxt_mask)*8];
+	int i;
+
+	/*
+	 * The FP xstates and SSE xstates are legacy states. They are always
+	 * in the fixed offsets in the xsave area in either compacted form
+	 * or standard form.
+	 */
+	xstate_comp_offsets[0] = 0;
+	xstate_comp_offsets[1] = offsetof(struct i387_fxsave_struct, xmm_space);
+
+	if (!cpu_has_xsaves) {
+		for (i = 2; i < xstate_features; i++) {
+			if (test_bit(i, (unsigned long *)&pcntxt_mask)) {
+				xstate_comp_offsets[i] = xstate_offsets[i];
+				xstate_comp_sizes[i] = xstate_sizes[i];
+			}
+		}
+		return;
+	}
+
+	xstate_comp_offsets[2] = FXSAVE_SIZE + XSAVE_HDR_SIZE;
+
+	for (i = 2; i < xstate_features; i++) {
+		if (test_bit(i, (unsigned long *)&pcntxt_mask))
+			xstate_comp_sizes[i] = xstate_sizes[i];
+		else
+			xstate_comp_sizes[i] = 0;
+
+		if (i > 2)
+			xstate_comp_offsets[i] = xstate_comp_offsets[i-1]
+					+ xstate_comp_sizes[i-1];
+
+	}
+}
+
+/*
  * setup the xstate image representing the init state
  */
 static void __init setup_init_fpu_buf(void)
@@ -496,15 +545,21 @@
 
 	setup_xstate_features();
 
+	if (cpu_has_xsaves) {
+		init_xstate_buf->xsave_hdr.xcomp_bv =
+						(u64)1 << 63 | pcntxt_mask;
+		init_xstate_buf->xsave_hdr.xstate_bv = pcntxt_mask;
+	}
+
 	/*
 	 * Init all the features state with header_bv being 0x0
 	 */
-	xrstor_state(init_xstate_buf, -1);
+	xrstor_state_booting(init_xstate_buf, -1);
 	/*
 	 * Dump the init state again. This is to identify the init state
 	 * of any feature which is not represented by all zero's.
 	 */
-	xsave_state(init_xstate_buf, -1);
+	xsave_state_booting(init_xstate_buf, -1);
 }
 
 static enum { AUTO, ENABLE, DISABLE } eagerfpu = AUTO;
@@ -520,6 +575,30 @@
 }
 __setup("eagerfpu=", eager_fpu_setup);
 
+
+/*
+ * Calculate total size of enabled xstates in XCR0/pcntxt_mask.
+ */
+static void __init init_xstate_size(void)
+{
+	unsigned int eax, ebx, ecx, edx;
+	int i;
+
+	if (!cpu_has_xsaves) {
+		cpuid_count(XSTATE_CPUID, 0, &eax, &ebx, &ecx, &edx);
+		xstate_size = ebx;
+		return;
+	}
+
+	xstate_size = FXSAVE_SIZE + XSAVE_HDR_SIZE;
+	for (i = 2; i < 64; i++) {
+		if (test_bit(i, (unsigned long *)&pcntxt_mask)) {
+			cpuid_count(XSTATE_CPUID, i, &eax, &ebx, &ecx, &edx);
+			xstate_size += eax;
+		}
+	}
+}
+
 /*
  * Enable and initialize the xsave feature.
  */
@@ -551,8 +630,7 @@
 	/*
 	 * Recompute the context size for enabled features
 	 */
-	cpuid_count(XSTATE_CPUID, 0, &eax, &ebx, &ecx, &edx);
-	xstate_size = ebx;
+	init_xstate_size();
 
 	update_regset_xstate_info(xstate_size, pcntxt_mask);
 	prepare_fx_sw_frame();
@@ -572,8 +650,9 @@
 		}
 	}
 
-	pr_info("enabled xstate_bv 0x%llx, cntxt size 0x%x\n",
-		pcntxt_mask, xstate_size);
+	pr_info("enabled xstate_bv 0x%llx, cntxt size 0x%x using %s\n",
+		pcntxt_mask, xstate_size,
+		cpu_has_xsaves ? "compacted form" : "standard form");
 }
 
 /*
@@ -635,3 +714,26 @@
 	else
 		fxrstor_checking(&init_xstate_buf->i387);
 }
+
+/*
+ * Given the xsave area and a state inside, this function returns the
+ * address of the state.
+ *
+ * This is the API that is called to get xstate address in either
+ * standard format or compacted format of xsave area.
+ *
+ * Inputs:
+ *	xsave: base address of the xsave area;
+ *	xstate: state which is defined in xsave.h (e.g. XSTATE_FP, XSTATE_SSE,
+ *	etc.)
+ * Output:
+ *	address of the state in the xsave area.
+ */
+void *get_xsave_addr(struct xsave_struct *xsave, int xstate)
+{
+	int feature = fls64(xstate) - 1;
+	if (!test_bit(feature, (unsigned long *)&pcntxt_mask))
+		return NULL;
+
+	return (void *)xsave + xstate_comp_offsets[feature];
+}
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 5075371..cfd1b13 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -448,7 +448,7 @@
 		return;
 
 	size = sizeof(*info->res) * info->res_num;
-	info->res = kzalloc(size, GFP_KERNEL);
+	info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node);
 	if (!info->res) {
 		info->res_num = 0;
 		return;
@@ -456,7 +456,7 @@
 
 	size = sizeof(*info->res_offset) * info->res_num;
 	info->res_num = 0;
-	info->res_offset = kzalloc(size, GFP_KERNEL);
+	info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
 	if (!info->res_offset) {
 		kfree(info->res);
 		info->res = NULL;
@@ -499,7 +499,7 @@
 	if (node != NUMA_NO_NODE && !node_online(node))
 		node = NUMA_NO_NODE;
 
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
 	if (!info) {
 		printk(KERN_WARNING "pci_bus %04x:%02x: "
 		       "ignored (out of memory)\n", domain, busnum);
diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index 84b9d67..3865116 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -208,27 +208,31 @@
 
 static int intel_mid_pci_irq_enable(struct pci_dev *dev)
 {
-	u8 pin;
-	struct io_apic_irq_attr irq_attr;
+	int polarity;
 
-	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+	if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER)
+		polarity = 0; /* active high */
+	else
+		polarity = 1; /* active low */
 
 	/*
 	 * MRST only have IOAPIC, the PCI irq lines are 1:1 mapped to
 	 * IOAPIC RTE entries, so we just enable RTE for the device.
 	 */
-	irq_attr.ioapic = mp_find_ioapic(dev->irq);
-	irq_attr.ioapic_pin = dev->irq;
-	irq_attr.trigger = 1; /* level */
-	if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER)
-		irq_attr.polarity = 0; /* active high */
-	else
-		irq_attr.polarity = 1; /* active low */
-	io_apic_set_pci_routing(&dev->dev, dev->irq, &irq_attr);
+	if (mp_set_gsi_attr(dev->irq, 1, polarity, dev_to_node(&dev->dev)))
+		return -EBUSY;
+	if (mp_map_gsi_to_irq(dev->irq, IOAPIC_MAP_ALLOC) < 0)
+		return -EBUSY;
 
 	return 0;
 }
 
+static void intel_mid_pci_irq_disable(struct pci_dev *dev)
+{
+	if (!dev->dev.power.is_prepared && dev->irq > 0)
+		mp_unmap_irq(dev->irq);
+}
+
 struct pci_ops intel_mid_pci_ops = {
 	.read = pci_read,
 	.write = pci_write,
@@ -245,6 +249,7 @@
 	pr_info("Intel MID platform detected, using MID PCI ops\n");
 	pci_mmcfg_late_init();
 	pcibios_enable_irq = intel_mid_pci_irq_enable;
+	pcibios_disable_irq = intel_mid_pci_irq_disable;
 	pci_root_ops = intel_mid_pci_ops;
 	pci_soc_mode = 1;
 	/* Continue with standard init */
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 84112f5..bc1a2c3 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -26,6 +26,7 @@
 static struct irq_routing_table *pirq_table;
 
 static int pirq_enable_irq(struct pci_dev *dev);
+static void pirq_disable_irq(struct pci_dev *dev);
 
 /*
  * Never use: 0, 1, 2 (timer, keyboard, and cascade)
@@ -53,7 +54,7 @@
 };
 
 int (*pcibios_enable_irq)(struct pci_dev *dev) = pirq_enable_irq;
-void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL;
+void (*pcibios_disable_irq)(struct pci_dev *dev) = pirq_disable_irq;
 
 /*
  *  Check passed address for the PCI IRQ Routing Table signature
@@ -1186,7 +1187,7 @@
 
 static int pirq_enable_irq(struct pci_dev *dev)
 {
-	u8 pin;
+	u8 pin = 0;
 
 	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 	if (pin && !pcibios_lookup_irq(dev, 1)) {
@@ -1227,8 +1228,6 @@
 			}
 			dev = temp_dev;
 			if (irq >= 0) {
-				io_apic_set_pci_routing(&dev->dev, irq,
-							 &irq_attr);
 				dev->irq = irq;
 				dev_info(&dev->dev, "PCI->APIC IRQ transform: "
 					 "INT %c -> IRQ %d\n", 'A' + pin - 1, irq);
@@ -1254,3 +1253,12 @@
 	}
 	return 0;
 }
+
+static void pirq_disable_irq(struct pci_dev *dev)
+{
+	if (io_apic_assign_pci_irqs && !dev->dev.power.is_prepared &&
+	    dev->irq) {
+		mp_unmap_irq(dev->irq);
+		dev->irq = 0;
+	}
+}
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 905956f..093f5f4 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -23,6 +23,7 @@
 #include <xen/features.h>
 #include <xen/events.h>
 #include <asm/xen/pci.h>
+#include <asm/i8259.h>
 
 static int xen_pcifront_enable_irq(struct pci_dev *dev)
 {
@@ -40,7 +41,7 @@
 	/* In PV DomU the Xen PCI backend puts the PIRQ in the interrupt line.*/
 	pirq = gsi;
 
-	if (gsi < NR_IRQS_LEGACY)
+	if (gsi < nr_legacy_irqs())
 		share = 0;
 
 	rc = xen_bind_pirq_gsi_to_irq(gsi, pirq, share, "pcifront");
@@ -511,7 +512,7 @@
 	xen_setup_acpi_sci();
 	__acpi_register_gsi = acpi_register_gsi_xen;
 	/* Pre-allocate legacy irqs */
-	for (irq = 0; irq < NR_IRQS_LEGACY; irq++) {
+	for (irq = 0; irq < nr_legacy_irqs(); irq++) {
 		int trigger, polarity;
 
 		if (acpi_get_override_irq(irq, &trigger, &polarity) == -1)
@@ -522,7 +523,7 @@
 			true /* Map GSI to PIRQ */);
 	}
 	if (0 == nr_ioapics) {
-		for (irq = 0; irq < NR_IRQS_LEGACY; irq++)
+		for (irq = 0; irq < nr_legacy_irqs(); irq++)
 			xen_bind_pirq_gsi_to_irq(irq, irq, 0, "xt-pic");
 	}
 	return 0;
diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index 8244f5e..701fd58 100644
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -135,14 +135,10 @@
 	sdv_serial_fixup();
 }
 
-#ifdef CONFIG_X86_IO_APIC
 static void sdv_pci_init(void)
 {
 	x86_of_pci_init();
-	/* We can't set this earlier, because we need to calibrate the timer */
-	legacy_pic = &null_legacy_pic;
 }
-#endif
 
 /*
  * CE4100 specific x86_init function overrides and early setup
@@ -155,7 +151,9 @@
 	x86_init.resources.probe_roms = x86_init_noop;
 	x86_init.mpparse.get_smp_config = x86_init_uint_noop;
 	x86_init.mpparse.find_smp_config = x86_init_noop;
+	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
 	x86_init.pci.init = ce4100_pci_init;
+	x86_init.pci.init_irq = sdv_pci_init;
 
 	/*
 	 * By default, the reboot method is ACPI which is supported by the
@@ -166,10 +164,5 @@
 	 */
 	reboot_type = BOOT_KBD;
 
-#ifdef CONFIG_X86_IO_APIC
-	x86_init.pci.init_irq = sdv_pci_init;
-	x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
-#endif
-
 	pm_power_off = ce4100_power_off;
 }
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
index 973cf3b..0b283d4 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
@@ -26,28 +26,18 @@
 
 static int tangier_probe(struct platform_device *pdev)
 {
-	int ioapic;
-	int irq;
+	int gsi;
 	struct intel_mid_wdt_pdata *pdata = pdev->dev.platform_data;
-	struct io_apic_irq_attr irq_attr = { 0 };
 
 	if (!pdata)
 		return -EINVAL;
 
-	irq = pdata->irq;
-	ioapic = mp_find_ioapic(irq);
-	if (ioapic >= 0) {
-		int ret;
-		irq_attr.ioapic = ioapic;
-		irq_attr.ioapic_pin = irq;
-		irq_attr.trigger = 1;
-		/* irq_attr.polarity = 0; -> Active high */
-		ret = io_apic_set_pci_routing(NULL, irq, &irq_attr);
-		if (ret)
-			return ret;
-	} else {
+	/* IOAPIC builds identity mapping between GSI and IRQ on MID */
+	gsi = pdata->irq;
+	if (mp_set_gsi_attr(gsi, 1, 0, cpu_to_node(0)) ||
+	    mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC) <= 0) {
 		dev_warn(&pdev->dev, "cannot find interrupt %d in ioapic\n",
-			 irq);
+			 gsi);
 		return -EINVAL;
 	}
 
diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c
index 994c40b..3c53a90 100644
--- a/arch/x86/platform/intel-mid/sfi.c
+++ b/arch/x86/platform/intel-mid/sfi.c
@@ -432,9 +432,8 @@
 	struct sfi_table_simple *sb;
 	struct sfi_device_table_entry *pentry;
 	struct devs_id *dev = NULL;
-	int num, i;
-	int ioapic;
-	struct io_apic_irq_attr irq_attr;
+	int num, i, ret;
+	int polarity;
 
 	sb = (struct sfi_table_simple *)table;
 	num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry);
@@ -448,35 +447,30 @@
 			 * devices, but they have separate RTE entry in IOAPIC
 			 * so we have to enable them one by one here
 			 */
-			ioapic = mp_find_ioapic(irq);
-			if (ioapic >= 0) {
-				irq_attr.ioapic = ioapic;
-				irq_attr.ioapic_pin = irq;
-				irq_attr.trigger = 1;
-				if (intel_mid_identify_cpu() ==
-						INTEL_MID_CPU_CHIP_TANGIER) {
-					if (!strncmp(pentry->name,
-							"r69001-ts-i2c", 13))
-						/* active low */
-						irq_attr.polarity = 1;
-					else if (!strncmp(pentry->name,
-							"synaptics_3202", 14))
-						/* active low */
-						irq_attr.polarity = 1;
-					else if (irq == 41)
-						/* fast_int_1 */
-						irq_attr.polarity = 1;
-					else
-						/* active high */
-						irq_attr.polarity = 0;
-				} else {
-					/* PNW and CLV go with active low */
-					irq_attr.polarity = 1;
-				}
-				io_apic_set_pci_routing(NULL, irq, &irq_attr);
+			if (intel_mid_identify_cpu() ==
+					INTEL_MID_CPU_CHIP_TANGIER) {
+				if (!strncmp(pentry->name, "r69001-ts-i2c", 13))
+					/* active low */
+					polarity = 1;
+				else if (!strncmp(pentry->name,
+						"synaptics_3202", 14))
+					/* active low */
+					polarity = 1;
+				else if (irq == 41)
+					/* fast_int_1 */
+					polarity = 1;
+				else
+					/* active high */
+					polarity = 0;
+			} else {
+				/* PNW and CLV go with active low */
+				polarity = 1;
 			}
-		} else {
-			irq = 0; /* No irq */
+
+			ret = mp_set_gsi_attr(irq, 1, polarity, NUMA_NO_NODE);
+			if (ret == 0)
+				ret = mp_map_gsi_to_irq(irq, IOAPIC_MAP_ALLOC);
+			WARN_ON(ret < 0);
 		}
 
 		dev = get_device_id(pentry->type, pentry->name);
diff --git a/arch/x86/platform/sfi/sfi.c b/arch/x86/platform/sfi/sfi.c
index bcd1a70..2a8a74f 100644
--- a/arch/x86/platform/sfi/sfi.c
+++ b/arch/x86/platform/sfi/sfi.c
@@ -25,6 +25,7 @@
 #include <linux/init.h>
 #include <linux/sfi.h>
 #include <linux/io.h>
+#include <linux/irqdomain.h>
 
 #include <asm/io_apic.h>
 #include <asm/mpspec.h>
@@ -70,19 +71,26 @@
 #endif /* CONFIG_X86_LOCAL_APIC */
 
 #ifdef CONFIG_X86_IO_APIC
+static struct irq_domain_ops sfi_ioapic_irqdomain_ops = {
+	.map = mp_irqdomain_map,
+};
 
 static int __init sfi_parse_ioapic(struct sfi_table_header *table)
 {
 	struct sfi_table_simple *sb;
 	struct sfi_apic_table_entry *pentry;
 	int i, num;
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_STRICT,
+		.ops = &sfi_ioapic_irqdomain_ops,
+	};
 
 	sb = (struct sfi_table_simple *)table;
 	num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
 	pentry = (struct sfi_apic_table_entry *)sb->pentry;
 
 	for (i = 0; i < num; i++) {
-		mp_register_ioapic(i, pentry->phys_addr, gsi_top);
+		mp_register_ioapic(i, pentry->phys_addr, gsi_top, &cfg);
 		pentry++;
 	}
 
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c
index c041304..1580e7a 100644
--- a/arch/x86/xen/grant-table.c
+++ b/arch/x86/xen/grant-table.c
@@ -118,6 +118,7 @@
 {
 	struct page **pages;
 	xen_pfn_t *pfns;
+	void *vaddr;
 	int rc;
 	unsigned int i;
 	unsigned long nr_grant_frames = gnttab_max_grant_frames();
@@ -143,21 +144,20 @@
 	for (i = 0; i < nr_grant_frames; i++)
 		pfns[i] = page_to_pfn(pages[i]);
 
-	rc = arch_gnttab_map_shared(pfns, nr_grant_frames, nr_grant_frames,
-				    &xen_auto_xlat_grant_frames.vaddr);
-
-	if (rc) {
+	vaddr = vmap(pages, nr_grant_frames, 0, PAGE_KERNEL);
+	if (!vaddr) {
 		pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__,
 			nr_grant_frames, rc);
 		free_xenballooned_pages(nr_grant_frames, pages);
 		kfree(pages);
 		kfree(pfns);
-		return rc;
+		return -ENOMEM;
 	}
 	kfree(pages);
 
 	xen_auto_xlat_grant_frames.pfn = pfns;
 	xen_auto_xlat_grant_frames.count = nr_grant_frames;
+	xen_auto_xlat_grant_frames.vaddr = vaddr;
 
 	return 0;
 }
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 7b78f88..5718b0b 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -444,7 +444,7 @@
 
 	irq = bind_virq_to_irqhandler(VIRQ_TIMER, cpu, xen_timer_interrupt,
 				      IRQF_PERCPU|IRQF_NOBALANCING|IRQF_TIMER|
-				      IRQF_FORCE_RESUME,
+				      IRQF_FORCE_RESUME|IRQF_EARLY_RESUME,
 				      name, NULL);
 	(void)xen_set_irq_priority(irq, XEN_IRQ_PRIORITY_MAX);
 
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 9e24106..bc423f7b 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -70,8 +70,10 @@
 					  bs->bvec_integrity_pool);
 		if (!bip->bip_vec)
 			goto err;
+		bip->bip_max_vcnt = bvec_nr_vecs(idx);
 	} else {
 		bip->bip_vec = bip->bip_inline_vecs;
+		bip->bip_max_vcnt = inline_vecs;
 	}
 
 	bip->bip_slab = idx;
@@ -114,14 +116,6 @@
 }
 EXPORT_SYMBOL(bio_integrity_free);
 
-static inline unsigned int bip_integrity_vecs(struct bio_integrity_payload *bip)
-{
-	if (bip->bip_slab == BIO_POOL_NONE)
-		return BIP_INLINE_VECS;
-
-	return bvec_nr_vecs(bip->bip_slab);
-}
-
 /**
  * bio_integrity_add_page - Attach integrity metadata
  * @bio:	bio to update
@@ -137,7 +131,7 @@
 	struct bio_integrity_payload *bip = bio->bi_integrity;
 	struct bio_vec *iv;
 
-	if (bip->bip_vcnt >= bip_integrity_vecs(bip)) {
+	if (bip->bip_vcnt >= bip->bip_max_vcnt) {
 		printk(KERN_ERR "%s: bip_vec full\n", __func__);
 		return 0;
 	}
diff --git a/block/bio.c b/block/bio.c
index 0ec61c9..3e6331d 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -112,7 +112,8 @@
 	bslab = &bio_slabs[entry];
 
 	snprintf(bslab->name, sizeof(bslab->name), "bio-%d", entry);
-	slab = kmem_cache_create(bslab->name, sz, 0, SLAB_HWCACHE_ALIGN, NULL);
+	slab = kmem_cache_create(bslab->name, sz, ARCH_KMALLOC_MINALIGN,
+				 SLAB_HWCACHE_ALIGN, NULL);
 	if (!slab)
 		goto out_unlock;
 
diff --git a/block/blk-core.c b/block/blk-core.c
index 6f8dba1..c359d72 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -438,14 +438,17 @@
  */
 void blk_queue_bypass_start(struct request_queue *q)
 {
-	bool drain;
-
 	spin_lock_irq(q->queue_lock);
-	drain = !q->bypass_depth++;
+	q->bypass_depth++;
 	queue_flag_set(QUEUE_FLAG_BYPASS, q);
 	spin_unlock_irq(q->queue_lock);
 
-	if (drain) {
+	/*
+	 * Queues start drained.  Skip actual draining till init is
+	 * complete.  This avoids lenghty delays during queue init which
+	 * can happen many times during boot.
+	 */
+	if (blk_queue_init_done(q)) {
 		spin_lock_irq(q->queue_lock);
 		__blk_drain_queue(q, false);
 		spin_unlock_irq(q->queue_lock);
@@ -511,7 +514,7 @@
 	 * prevent that q->request_fn() gets invoked after draining finished.
 	 */
 	if (q->mq_ops) {
-		blk_mq_drain_queue(q);
+		blk_mq_freeze_queue(q);
 		spin_lock_irq(lock);
 	} else {
 		spin_lock_irq(lock);
diff --git a/block/blk-mq.c b/block/blk-mq.c
index ad69ef6..5189cb1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -78,68 +78,47 @@
 
 static int blk_mq_queue_enter(struct request_queue *q)
 {
-	int ret;
+	while (true) {
+		int ret;
 
-	__percpu_counter_add(&q->mq_usage_counter, 1, 1000000);
-	smp_wmb();
+		if (percpu_ref_tryget_live(&q->mq_usage_counter))
+			return 0;
 
-	/* we have problems freezing the queue if it's initializing */
-	if (!blk_queue_dying(q) &&
-	    (!blk_queue_bypass(q) || !blk_queue_init_done(q)))
-		return 0;
-
-	__percpu_counter_add(&q->mq_usage_counter, -1, 1000000);
-
-	spin_lock_irq(q->queue_lock);
-	ret = wait_event_interruptible_lock_irq(q->mq_freeze_wq,
-		!blk_queue_bypass(q) || blk_queue_dying(q),
-		*q->queue_lock);
-	/* inc usage with lock hold to avoid freeze_queue runs here */
-	if (!ret && !blk_queue_dying(q))
-		__percpu_counter_add(&q->mq_usage_counter, 1, 1000000);
-	else if (blk_queue_dying(q))
-		ret = -ENODEV;
-	spin_unlock_irq(q->queue_lock);
-
-	return ret;
+		ret = wait_event_interruptible(q->mq_freeze_wq,
+				!q->mq_freeze_depth || blk_queue_dying(q));
+		if (blk_queue_dying(q))
+			return -ENODEV;
+		if (ret)
+			return ret;
+	}
 }
 
 static void blk_mq_queue_exit(struct request_queue *q)
 {
-	__percpu_counter_add(&q->mq_usage_counter, -1, 1000000);
+	percpu_ref_put(&q->mq_usage_counter);
 }
 
-void blk_mq_drain_queue(struct request_queue *q)
+static void blk_mq_usage_counter_release(struct percpu_ref *ref)
 {
-	while (true) {
-		s64 count;
+	struct request_queue *q =
+		container_of(ref, struct request_queue, mq_usage_counter);
 
-		spin_lock_irq(q->queue_lock);
-		count = percpu_counter_sum(&q->mq_usage_counter);
-		spin_unlock_irq(q->queue_lock);
-
-		if (count == 0)
-			break;
-		blk_mq_start_hw_queues(q);
-		msleep(10);
-	}
+	wake_up_all(&q->mq_freeze_wq);
 }
 
 /*
  * Guarantee no request is in use, so we can change any data structure of
  * the queue afterward.
  */
-static void blk_mq_freeze_queue(struct request_queue *q)
+void blk_mq_freeze_queue(struct request_queue *q)
 {
-	bool drain;
-
 	spin_lock_irq(q->queue_lock);
-	drain = !q->bypass_depth++;
-	queue_flag_set(QUEUE_FLAG_BYPASS, q);
+	q->mq_freeze_depth++;
 	spin_unlock_irq(q->queue_lock);
 
-	if (drain)
-		blk_mq_drain_queue(q);
+	percpu_ref_kill(&q->mq_usage_counter);
+	blk_mq_run_queues(q, false);
+	wait_event(q->mq_freeze_wq, percpu_ref_is_zero(&q->mq_usage_counter));
 }
 
 static void blk_mq_unfreeze_queue(struct request_queue *q)
@@ -147,14 +126,13 @@
 	bool wake = false;
 
 	spin_lock_irq(q->queue_lock);
-	if (!--q->bypass_depth) {
-		queue_flag_clear(QUEUE_FLAG_BYPASS, q);
-		wake = true;
-	}
-	WARN_ON_ONCE(q->bypass_depth < 0);
+	wake = !--q->mq_freeze_depth;
+	WARN_ON_ONCE(q->mq_freeze_depth < 0);
 	spin_unlock_irq(q->queue_lock);
-	if (wake)
+	if (wake) {
+		percpu_ref_reinit(&q->mq_usage_counter);
 		wake_up_all(&q->mq_freeze_wq);
+	}
 }
 
 bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
@@ -1798,7 +1776,7 @@
 	if (!q)
 		goto err_hctxs;
 
-	if (percpu_counter_init(&q->mq_usage_counter, 0))
+	if (percpu_ref_init(&q->mq_usage_counter, blk_mq_usage_counter_release))
 		goto err_map;
 
 	setup_timer(&q->timeout, blk_mq_rq_timer, (unsigned long) q);
@@ -1891,7 +1869,7 @@
 	blk_mq_exit_hw_queues(q, set, set->nr_hw_queues);
 	blk_mq_free_hw_queues(q, set);
 
-	percpu_counter_destroy(&q->mq_usage_counter);
+	percpu_ref_exit(&q->mq_usage_counter);
 
 	free_percpu(q->queue_ctx);
 	kfree(q->queue_hw_ctx);
@@ -2050,8 +2028,7 @@
 {
 	blk_mq_cpu_init();
 
-	/* Must be called after percpu_counter_hotcpu_callback() */
-	hotcpu_notifier(blk_mq_queue_reinit_notify, -10);
+	hotcpu_notifier(blk_mq_queue_reinit_notify, 0);
 
 	return 0;
 }
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 2646088..ca4964a 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -28,7 +28,7 @@
 void __blk_mq_complete_request(struct request *rq);
 void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
 void blk_mq_init_flush(struct request_queue *q);
-void blk_mq_drain_queue(struct request_queue *q);
+void blk_mq_freeze_queue(struct request_queue *q);
 void blk_mq_free_queue(struct request_queue *q);
 void blk_mq_clone_flush_request(struct request *flush_rq,
 		struct request *orig_rq);
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 23321fb..4db5abf 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -554,8 +554,8 @@
 	 * Initialization must be complete by now.  Finish the initial
 	 * bypass from queue allocation.
 	 */
-	blk_queue_bypass_end(q);
 	queue_flag_set_unlocked(QUEUE_FLAG_INIT_DONE, q);
+	blk_queue_bypass_end(q);
 
 	ret = blk_trace_init_sysfs(dev);
 	if (ret)
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index a0926a6..18b282c 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -663,6 +663,7 @@
 	fmode_t mode = file->f_mode;
 	struct backing_dev_info *bdi;
 	loff_t size;
+	unsigned int max_sectors;
 
 	/*
 	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
@@ -719,8 +720,9 @@
 	case BLKSSZGET: /* get block device hardware sector size */
 		return compat_put_int(arg, bdev_logical_block_size(bdev));
 	case BLKSECTGET:
-		return compat_put_ushort(arg,
-					 queue_max_sectors(bdev_get_queue(bdev)));
+		max_sectors = min_t(unsigned int, USHRT_MAX,
+				    queue_max_sectors(bdev_get_queue(bdev)));
+		return compat_put_ushort(arg, max_sectors);
 	case BLKROTATIONAL:
 		return compat_put_ushort(arg,
 					 !blk_queue_nonrot(bdev_get_queue(bdev)));
diff --git a/block/ioctl.c b/block/ioctl.c
index 7d5c3b2..d6cda81 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -278,6 +278,7 @@
 	struct backing_dev_info *bdi;
 	loff_t size;
 	int ret, n;
+	unsigned int max_sectors;
 
 	switch(cmd) {
 	case BLKFLSBUF:
@@ -375,7 +376,9 @@
 	case BLKDISCARDZEROES:
 		return put_uint(arg, bdev_discard_zeroes_data(bdev));
 	case BLKSECTGET:
-		return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
+		max_sectors = min_t(unsigned int, USHRT_MAX,
+				    queue_max_sectors(bdev_get_queue(bdev)));
+		return put_ushort(arg, max_sectors);
 	case BLKROTATIONAL:
 		return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev)));
 	case BLKRASET:
diff --git a/block/partitions/aix.c b/block/partitions/aix.c
index 43be471..f3ed7b2 100644
--- a/block/partitions/aix.c
+++ b/block/partitions/aix.c
@@ -215,7 +215,7 @@
 		numlvs = be16_to_cpu(p->numlvs);
 		put_dev_sector(sect);
 	}
-	lvip = kzalloc(sizeof(struct lv_info) * state->limit, GFP_KERNEL);
+	lvip = kcalloc(state->limit, sizeof(struct lv_info), GFP_KERNEL);
 	if (!lvip)
 		return 0;
 	if (numlvs && (d = read_part_sector(state, vgda_sector + 1, &sect))) {
@@ -253,7 +253,7 @@
 				continue;
 			}
 			lv_ix = be16_to_cpu(p->lv_ix) - 1;
-			if (lv_ix > state->limit) {
+			if (lv_ix >= state->limit) {
 				cur_lv_ix = -1;
 				continue;
 			}
diff --git a/block/partitions/amiga.c b/block/partitions/amiga.c
index 70cbf44..2b13533 100644
--- a/block/partitions/amiga.c
+++ b/block/partitions/amiga.c
@@ -7,6 +7,8 @@
  *  Re-organised Feb 1998 Russell King
  */
 
+#define pr_fmt(fmt) fmt
+
 #include <linux/types.h>
 #include <linux/affs_hardblocks.h>
 
@@ -40,7 +42,7 @@
 		data = read_part_sector(state, blk, &sect);
 		if (!data) {
 			if (warn_no_part)
-				printk("Dev %s: unable to read RDB block %d\n",
+				pr_err("Dev %s: unable to read RDB block %d\n",
 				       bdevname(state->bdev, b), blk);
 			res = -1;
 			goto rdb_done;
@@ -57,12 +59,12 @@
 		*(__be32 *)(data+0xdc) = 0;
 		if (checksum_block((__be32 *)data,
 				be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F)==0) {
-			printk("Warning: Trashed word at 0xd0 in block %d "
-				"ignored in checksum calculation\n",blk);
+			pr_err("Trashed word at 0xd0 in block %d ignored in checksum calculation\n",
+			       blk);
 			break;
 		}
 
-		printk("Dev %s: RDB in block %d has bad checksum\n",
+		pr_err("Dev %s: RDB in block %d has bad checksum\n",
 		       bdevname(state->bdev, b), blk);
 	}
 
@@ -83,7 +85,7 @@
 		data = read_part_sector(state, blk, &sect);
 		if (!data) {
 			if (warn_no_part)
-				printk("Dev %s: unable to read partition block %d\n",
+				pr_err("Dev %s: unable to read partition block %d\n",
 				       bdevname(state->bdev, b), blk);
 			res = -1;
 			goto rdb_done;
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index dc51f46..56d08fd 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -121,7 +121,7 @@
 /**
  * efi_crc32() - EFI version of crc32 function
  * @buf: buffer to calculate crc32 of
- * @len - length of buf
+ * @len: length of buf
  *
  * Description: Returns EFI-style CRC32 value for @buf
  * 
@@ -240,10 +240,10 @@
 
 /**
  * read_lba(): Read bytes from disk, starting at given LBA
- * @state
- * @lba
- * @buffer
- * @size_t
+ * @state: disk parsed partitions
+ * @lba: the Logical Block Address of the partition table
+ * @buffer: destination buffer
+ * @count: bytes to read
  *
  * Description: Reads @count bytes from @state->bdev into @buffer.
  * Returns number of bytes read on success, 0 on error.
@@ -277,8 +277,8 @@
 
 /**
  * alloc_read_gpt_entries(): reads partition entries from disk
- * @state
- * @gpt - GPT header
+ * @state: disk parsed partitions
+ * @gpt: GPT header
  * 
  * Description: Returns ptes on success,  NULL on error.
  * Allocates space for PTEs based on information found in @gpt.
@@ -312,8 +312,8 @@
 
 /**
  * alloc_read_gpt_header(): Allocates GPT header, reads into it from disk
- * @state
- * @lba is the Logical Block Address of the partition table
+ * @state: disk parsed partitions
+ * @lba: the Logical Block Address of the partition table
  * 
  * Description: returns GPT header on success, NULL on error.   Allocates
  * and fills a GPT header starting at @ from @state->bdev.
@@ -340,10 +340,10 @@
 
 /**
  * is_gpt_valid() - tests one GPT header and PTEs for validity
- * @state
- * @lba is the logical block address of the GPT header to test
- * @gpt is a GPT header ptr, filled on return.
- * @ptes is a PTEs ptr, filled on return.
+ * @state: disk parsed partitions
+ * @lba: logical block address of the GPT header to test
+ * @gpt: GPT header ptr, filled on return.
+ * @ptes: PTEs ptr, filled on return.
  *
  * Description: returns 1 if valid,  0 on error.
  * If valid, returns pointers to newly allocated GPT header and PTEs.
@@ -461,8 +461,8 @@
 
 /**
  * is_pte_valid() - tests one PTE for validity
- * @pte is the pte to check
- * @lastlba is last lba of the disk
+ * @pte:pte to check
+ * @lastlba: last lba of the disk
  *
  * Description: returns 1 if valid,  0 on error.
  */
@@ -478,9 +478,10 @@
 
 /**
  * compare_gpts() - Search disk for valid GPT headers and PTEs
- * @pgpt is the primary GPT header
- * @agpt is the alternate GPT header
- * @lastlba is the last LBA number
+ * @pgpt: primary GPT header
+ * @agpt: alternate GPT header
+ * @lastlba: last LBA number
+ *
  * Description: Returns nothing.  Sanity checks pgpt and agpt fields
  * and prints warnings on discrepancies.
  * 
@@ -572,9 +573,10 @@
 
 /**
  * find_valid_gpt() - Search disk for valid GPT headers and PTEs
- * @state
- * @gpt is a GPT header ptr, filled on return.
- * @ptes is a PTEs ptr, filled on return.
+ * @state: disk parsed partitions
+ * @gpt: GPT header ptr, filled on return.
+ * @ptes: PTEs ptr, filled on return.
+ *
  * Description: Returns 1 if valid, 0 on error.
  * If valid, returns pointers to newly allocated GPT header and PTEs.
  * Validity depends on PMBR being valid (or being overridden by the
@@ -663,7 +665,7 @@
 
 /**
  * efi_partition(struct parsed_partitions *state)
- * @state
+ * @state: disk parsed partitions
  *
  * Description: called from check.c, if the disk contains GPT
  * partitions, sets up partition entries in the kernel.
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c
index 9123f25..93e7c1b 100644
--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -159,8 +159,9 @@
 		/*
 		 * First process the data partition(s)
 		 */
-		for (i=0; i<4; i++, p++) {
+		for (i = 0; i < 4; i++, p++) {
 			sector_t offs, size, next;
+
 			if (!nr_sects(p) || is_extended_partition(p))
 				continue;
 
@@ -194,7 +195,7 @@
 		 * It should be a link to the next logical partition.
 		 */
 		p -= 4;
-		for (i=0; i<4; i++, p++)
+		for (i = 0; i < 4; i++, p++)
 			if (nr_sects(p) && is_extended_partition(p))
 				break;
 		if (i == 4)
@@ -243,8 +244,8 @@
 		return;
 	}
 	/* Ensure we can handle previous case of VTOC with 8 entries gracefully */
-	max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
-	for (i=0; i<max_nparts && state->next<state->limit; i++) {
+	max_nparts = le16_to_cpu(v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
+	for (i = 0; i < max_nparts && state->next < state->limit; i++) {
 		struct solaris_x86_slice *s = &v->v_slice[i];
 		char tmp[3 + 10 + 1 + 1];
 
@@ -409,7 +410,7 @@
 	/* The first sector of a Minix partition can have either
 	 * a secondary MBR describing its subpartitions, or
 	 * the normal boot sector. */
-	if (msdos_magic_present (data + 510) &&
+	if (msdos_magic_present(data + 510) &&
 	    SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */
 		char tmp[1 + BDEVNAME_SIZE + 10 + 9 + 1];
 
@@ -527,6 +528,7 @@
 	for (slot = 1 ; slot <= 4 ; slot++, p++) {
 		sector_t start = start_sect(p)*sector_size;
 		sector_t size = nr_sects(p)*sector_size;
+
 		if (!size)
 			continue;
 		if (is_extended_partition(p)) {
@@ -537,6 +539,7 @@
 			 * sector, although it may not be enough/proper.
 			 */
 			sector_t n = 2;
+
 			n = min(size, max(sector_size, n));
 			put_partition(state, slot, start, n);
 
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 14695c6..51bf515 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -82,9 +82,18 @@
 	return err;
 }
 
+static int max_sectors_bytes(struct request_queue *q)
+{
+	unsigned int max_sectors = queue_max_sectors(q);
+
+	max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9);
+
+	return max_sectors << 9;
+}
+
 static int sg_get_reserved_size(struct request_queue *q, int __user *p)
 {
-	unsigned val = min(q->sg_reserved_size, queue_max_sectors(q) << 9);
+	int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q));
 
 	return put_user(val, p);
 }
@@ -98,10 +107,8 @@
 
 	if (size < 0)
 		return -EINVAL;
-	if (size > (queue_max_sectors(q) << 9))
-		size = queue_max_sectors(q) << 9;
 
-	q->sg_reserved_size = size;
+	q->sg_reserved_size = min(size, max_sectors_bytes(q));
 	return 0;
 }
 
@@ -283,6 +290,7 @@
 	unsigned long start_time;
 	ssize_t ret = 0;
 	int writing = 0;
+	int at_head = 0;
 	struct request *rq;
 	char sense[SCSI_SENSE_BUFFERSIZE];
 	struct bio *bio;
@@ -306,6 +314,8 @@
 		case SG_DXFER_FROM_DEV:
 			break;
 		}
+	if (hdr->flags & SG_FLAG_Q_AT_HEAD)
+		at_head = 1;
 
 	rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
 	if (!rq)
@@ -362,7 +372,7 @@
 	 * (if he doesn't check that is his problem).
 	 * N.B. a non-zero SCSI status is _not_ necessarily an error.
 	 */
-	blk_execute_rq(q, bd_disk, rq, 0);
+	blk_execute_rq(q, bd_disk, rq, at_head);
 
 	hdr->duration = jiffies_to_msecs(jiffies - start_time);
 
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 9c62340..c96887d 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -481,6 +481,10 @@
 	if (!pin)
 		return;
 
+	/* Keep IOAPIC pin configuration when suspending */
+	if (dev->dev.power.is_prepared)
+		return;
+
 	entry = acpi_pci_irq_lookup(dev, pin);
 	if (!entry)
 		return;
@@ -498,5 +502,6 @@
 	 */
 
 	dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
-	acpi_unregister_gsi(gsi);
+	if (gsi >= 0 && dev->irq > 0)
+		acpi_unregister_gsi(gsi);
 }
diff --git a/drivers/atm/atmtcp.c b/drivers/atm/atmtcp.c
index 0e3f8f9..480fa6f 100644
--- a/drivers/atm/atmtcp.c
+++ b/drivers/atm/atmtcp.c
@@ -299,6 +299,7 @@
 	out_vcc = find_vcc(dev, ntohs(hdr->vpi), ntohs(hdr->vci));
 	read_unlock(&vcc_sklist_lock);
 	if (!out_vcc) {
+		result = -EUNATCH;
 		atomic_inc(&vcc->stats->tx_err);
 		goto done;
 	}
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index 943cf0d..7652e8d 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -1278,6 +1278,7 @@
 			card->dma_bounce = kmalloc(card->nr_ports * BUF_SIZE, GFP_KERNEL);
 			if (!card->dma_bounce) {
 				dev_warn(&card->dev->dev, "Failed to allocate DMA bounce buffers\n");
+				err = -ENOMEM;
 				/* Fallback to MMIO doesn't work */
 				goto out_unmap_both;
 			}
diff --git a/drivers/block/drbd/Makefile b/drivers/block/drbd/Makefile
index 8b45033..4464e35 100644
--- a/drivers/block/drbd/Makefile
+++ b/drivers/block/drbd/Makefile
@@ -3,5 +3,6 @@
 drbd-y += drbd_main.o drbd_strings.o drbd_nl.o
 drbd-y += drbd_interval.o drbd_state.o
 drbd-y += drbd_nla.o
+drbd-$(CONFIG_DEBUG_FS) += drbd_debugfs.o
 
 obj-$(CONFIG_BLK_DEV_DRBD)     += drbd.o
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index 05a1780..d26a3fa 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -92,34 +92,26 @@
 	__be32	context[AL_CONTEXT_PER_TRANSACTION];
 };
 
-struct update_odbm_work {
-	struct drbd_work w;
-	struct drbd_device *device;
-	unsigned int enr;
-};
-
-struct update_al_work {
-	struct drbd_work w;
-	struct drbd_device *device;
-	struct completion event;
-	int err;
-};
-
-
-void *drbd_md_get_buffer(struct drbd_device *device)
+void *drbd_md_get_buffer(struct drbd_device *device, const char *intent)
 {
 	int r;
 
 	wait_event(device->misc_wait,
-		   (r = atomic_cmpxchg(&device->md_io_in_use, 0, 1)) == 0 ||
+		   (r = atomic_cmpxchg(&device->md_io.in_use, 0, 1)) == 0 ||
 		   device->state.disk <= D_FAILED);
 
-	return r ? NULL : page_address(device->md_io_page);
+	if (r)
+		return NULL;
+
+	device->md_io.current_use = intent;
+	device->md_io.start_jif = jiffies;
+	device->md_io.submit_jif = device->md_io.start_jif - 1;
+	return page_address(device->md_io.page);
 }
 
 void drbd_md_put_buffer(struct drbd_device *device)
 {
-	if (atomic_dec_and_test(&device->md_io_in_use))
+	if (atomic_dec_and_test(&device->md_io.in_use))
 		wake_up(&device->misc_wait);
 }
 
@@ -145,10 +137,11 @@
 
 static int _drbd_md_sync_page_io(struct drbd_device *device,
 				 struct drbd_backing_dev *bdev,
-				 struct page *page, sector_t sector,
-				 int rw, int size)
+				 sector_t sector, int rw)
 {
 	struct bio *bio;
+	/* we do all our meta data IO in aligned 4k blocks. */
+	const int size = 4096;
 	int err;
 
 	device->md_io.done = 0;
@@ -156,15 +149,15 @@
 
 	if ((rw & WRITE) && !test_bit(MD_NO_FUA, &device->flags))
 		rw |= REQ_FUA | REQ_FLUSH;
-	rw |= REQ_SYNC;
+	rw |= REQ_SYNC | REQ_NOIDLE;
 
 	bio = bio_alloc_drbd(GFP_NOIO);
 	bio->bi_bdev = bdev->md_bdev;
 	bio->bi_iter.bi_sector = sector;
 	err = -EIO;
-	if (bio_add_page(bio, page, size, 0) != size)
+	if (bio_add_page(bio, device->md_io.page, size, 0) != size)
 		goto out;
-	bio->bi_private = &device->md_io;
+	bio->bi_private = device;
 	bio->bi_end_io = drbd_md_io_complete;
 	bio->bi_rw = rw;
 
@@ -179,7 +172,8 @@
 	}
 
 	bio_get(bio); /* one bio_put() is in the completion handler */
-	atomic_inc(&device->md_io_in_use); /* drbd_md_put_buffer() is in the completion handler */
+	atomic_inc(&device->md_io.in_use); /* drbd_md_put_buffer() is in the completion handler */
+	device->md_io.submit_jif = jiffies;
 	if (drbd_insert_fault(device, (rw & WRITE) ? DRBD_FAULT_MD_WR : DRBD_FAULT_MD_RD))
 		bio_endio(bio, -EIO);
 	else
@@ -197,9 +191,7 @@
 			 sector_t sector, int rw)
 {
 	int err;
-	struct page *iop = device->md_io_page;
-
-	D_ASSERT(device, atomic_read(&device->md_io_in_use) == 1);
+	D_ASSERT(device, atomic_read(&device->md_io.in_use) == 1);
 
 	BUG_ON(!bdev->md_bdev);
 
@@ -214,8 +206,7 @@
 		     current->comm, current->pid, __func__,
 		     (unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ");
 
-	/* we do all our meta data IO in aligned 4k blocks. */
-	err = _drbd_md_sync_page_io(device, bdev, iop, sector, rw, 4096);
+	err = _drbd_md_sync_page_io(device, bdev, sector, rw);
 	if (err) {
 		drbd_err(device, "drbd_md_sync_page_io(,%llus,%s) failed with error %d\n",
 		    (unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ", err);
@@ -297,26 +288,12 @@
 	return need_transaction;
 }
 
-static int al_write_transaction(struct drbd_device *device, bool delegate);
+static int al_write_transaction(struct drbd_device *device);
 
-/* When called through generic_make_request(), we must delegate
- * activity log I/O to the worker thread: a further request
- * submitted via generic_make_request() within the same task
- * would be queued on current->bio_list, and would only start
- * after this function returns (see generic_make_request()).
- *
- * However, if we *are* the worker, we must not delegate to ourselves.
- */
-
-/*
- * @delegate:   delegate activity log I/O to the worker thread
- */
-void drbd_al_begin_io_commit(struct drbd_device *device, bool delegate)
+void drbd_al_begin_io_commit(struct drbd_device *device)
 {
 	bool locked = false;
 
-	BUG_ON(delegate && current == first_peer_device(device)->connection->worker.task);
-
 	/* Serialize multiple transactions.
 	 * This uses test_and_set_bit, memory barrier is implicit.
 	 */
@@ -335,7 +312,7 @@
 			rcu_read_unlock();
 
 			if (write_al_updates)
-				al_write_transaction(device, delegate);
+				al_write_transaction(device);
 			spin_lock_irq(&device->al_lock);
 			/* FIXME
 			if (err)
@@ -352,12 +329,10 @@
 /*
  * @delegate:   delegate activity log I/O to the worker thread
  */
-void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i, bool delegate)
+void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i)
 {
-	BUG_ON(delegate && current == first_peer_device(device)->connection->worker.task);
-
 	if (drbd_al_begin_io_prepare(device, i))
-		drbd_al_begin_io_commit(device, delegate);
+		drbd_al_begin_io_commit(device);
 }
 
 int drbd_al_begin_io_nonblock(struct drbd_device *device, struct drbd_interval *i)
@@ -380,8 +355,19 @@
 	/* We want all necessary updates for a given request within the same transaction
 	 * We could first check how many updates are *actually* needed,
 	 * and use that instead of the worst-case nr_al_extents */
-	if (available_update_slots < nr_al_extents)
-		return -EWOULDBLOCK;
+	if (available_update_slots < nr_al_extents) {
+		/* Too many activity log extents are currently "hot".
+		 *
+		 * If we have accumulated pending changes already,
+		 * we made progress.
+		 *
+		 * If we cannot get even a single pending change through,
+		 * stop the fast path until we made some progress,
+		 * or requests to "cold" extents could be starved. */
+		if (!al->pending_changes)
+			__set_bit(__LC_STARVING, &device->act_log->flags);
+		return -ENOBUFS;
+	}
 
 	/* Is resync active in this area? */
 	for (enr = first; enr <= last; enr++) {
@@ -452,15 +438,6 @@
 		 (AL_EXTENT_SHIFT - BM_BLOCK_SHIFT));
 }
 
-static unsigned int rs_extent_to_bm_page(unsigned int rs_enr)
-{
-	return rs_enr >>
-		/* bit to page */
-		((PAGE_SHIFT + 3) -
-		/* resync extent number to bit */
-		 (BM_EXT_SHIFT - BM_BLOCK_SHIFT));
-}
-
 static sector_t al_tr_number_to_on_disk_sector(struct drbd_device *device)
 {
 	const unsigned int stripes = device->ldev->md.al_stripes;
@@ -479,8 +456,7 @@
 	return device->ldev->md.md_offset + device->ldev->md.al_offset + t;
 }
 
-static int
-_al_write_transaction(struct drbd_device *device)
+int al_write_transaction(struct drbd_device *device)
 {
 	struct al_transaction_on_disk *buffer;
 	struct lc_element *e;
@@ -505,7 +481,8 @@
 		return -EIO;
 	}
 
-	buffer = drbd_md_get_buffer(device); /* protects md_io_buffer, al_tr_cycle, ... */
+	/* protects md_io_buffer, al_tr_cycle, ... */
+	buffer = drbd_md_get_buffer(device, __func__);
 	if (!buffer) {
 		drbd_err(device, "disk failed while waiting for md_io buffer\n");
 		put_ldev(device);
@@ -590,38 +567,6 @@
 	return err;
 }
 
-
-static int w_al_write_transaction(struct drbd_work *w, int unused)
-{
-	struct update_al_work *aw = container_of(w, struct update_al_work, w);
-	struct drbd_device *device = aw->device;
-	int err;
-
-	err = _al_write_transaction(device);
-	aw->err = err;
-	complete(&aw->event);
-
-	return err != -EIO ? err : 0;
-}
-
-/* Calls from worker context (see w_restart_disk_io()) need to write the
-   transaction directly. Others came through generic_make_request(),
-   those need to delegate it to the worker. */
-static int al_write_transaction(struct drbd_device *device, bool delegate)
-{
-	if (delegate) {
-		struct update_al_work al_work;
-		init_completion(&al_work.event);
-		al_work.w.cb = w_al_write_transaction;
-		al_work.device = device;
-		drbd_queue_work_front(&first_peer_device(device)->connection->sender_work,
-				      &al_work.w);
-		wait_for_completion(&al_work.event);
-		return al_work.err;
-	} else
-		return _al_write_transaction(device);
-}
-
 static int _try_lc_del(struct drbd_device *device, struct lc_element *al_ext)
 {
 	int rv;
@@ -682,72 +627,56 @@
 	return 0;
 }
 
-static int w_update_odbm(struct drbd_work *w, int unused)
-{
-	struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w);
-	struct drbd_device *device = udw->device;
-	struct sib_info sib = { .sib_reason = SIB_SYNC_PROGRESS, };
-
-	if (!get_ldev(device)) {
-		if (__ratelimit(&drbd_ratelimit_state))
-			drbd_warn(device, "Can not update on disk bitmap, local IO disabled.\n");
-		kfree(udw);
-		return 0;
-	}
-
-	drbd_bm_write_page(device, rs_extent_to_bm_page(udw->enr));
-	put_ldev(device);
-
-	kfree(udw);
-
-	if (drbd_bm_total_weight(device) <= device->rs_failed) {
-		switch (device->state.conn) {
-		case C_SYNC_SOURCE:  case C_SYNC_TARGET:
-		case C_PAUSED_SYNC_S: case C_PAUSED_SYNC_T:
-			drbd_resync_finished(device);
-		default:
-			/* nothing to do */
-			break;
-		}
-	}
-	drbd_bcast_event(device, &sib);
-
-	return 0;
-}
-
+static const char *drbd_change_sync_fname[] = {
+	[RECORD_RS_FAILED] = "drbd_rs_failed_io",
+	[SET_IN_SYNC] = "drbd_set_in_sync",
+	[SET_OUT_OF_SYNC] = "drbd_set_out_of_sync"
+};
 
 /* ATTENTION. The AL's extents are 4MB each, while the extents in the
  * resync LRU-cache are 16MB each.
  * The caller of this function has to hold an get_ldev() reference.
  *
+ * Adjusts the caching members ->rs_left (success) or ->rs_failed (!success),
+ * potentially pulling in (and recounting the corresponding bits)
+ * this resync extent into the resync extent lru cache.
+ *
+ * Returns whether all bits have been cleared for this resync extent,
+ * precisely: (rs_left <= rs_failed)
+ *
  * TODO will be obsoleted once we have a caching lru of the on disk bitmap
  */
-static void drbd_try_clear_on_disk_bm(struct drbd_device *device, sector_t sector,
-				      int count, int success)
+static bool update_rs_extent(struct drbd_device *device,
+		unsigned int enr, int count,
+		enum update_sync_bits_mode mode)
 {
 	struct lc_element *e;
-	struct update_odbm_work *udw;
-
-	unsigned int enr;
 
 	D_ASSERT(device, atomic_read(&device->local_cnt));
 
-	/* I simply assume that a sector/size pair never crosses
-	 * a 16 MB extent border. (Currently this is true...) */
-	enr = BM_SECT_TO_EXT(sector);
-
-	e = lc_get(device->resync, enr);
+	/* When setting out-of-sync bits,
+	 * we don't need it cached (lc_find).
+	 * But if it is present in the cache,
+	 * we should update the cached bit count.
+	 * Otherwise, that extent should be in the resync extent lru cache
+	 * already -- or we want to pull it in if necessary -- (lc_get),
+	 * then update and check rs_left and rs_failed. */
+	if (mode == SET_OUT_OF_SYNC)
+		e = lc_find(device->resync, enr);
+	else
+		e = lc_get(device->resync, enr);
 	if (e) {
 		struct bm_extent *ext = lc_entry(e, struct bm_extent, lce);
 		if (ext->lce.lc_number == enr) {
-			if (success)
+			if (mode == SET_IN_SYNC)
 				ext->rs_left -= count;
+			else if (mode == SET_OUT_OF_SYNC)
+				ext->rs_left += count;
 			else
 				ext->rs_failed += count;
 			if (ext->rs_left < ext->rs_failed) {
-				drbd_warn(device, "BAD! sector=%llus enr=%u rs_left=%d "
+				drbd_warn(device, "BAD! enr=%u rs_left=%d "
 				    "rs_failed=%d count=%d cstate=%s\n",
-				     (unsigned long long)sector,
 				     ext->lce.lc_number, ext->rs_left,
 				     ext->rs_failed, count,
 				     drbd_conn_str(device->state.conn));
@@ -781,34 +710,27 @@
 				     ext->lce.lc_number, ext->rs_failed);
 			}
 			ext->rs_left = rs_left;
-			ext->rs_failed = success ? 0 : count;
+			ext->rs_failed = (mode == RECORD_RS_FAILED) ? count : 0;
 			/* we don't keep a persistent log of the resync lru,
 			 * we can commit any change right away. */
 			lc_committed(device->resync);
 		}
-		lc_put(device->resync, &ext->lce);
+		if (mode != SET_OUT_OF_SYNC)
+			lc_put(device->resync, &ext->lce);
 		/* no race, we are within the al_lock! */
 
-		if (ext->rs_left == ext->rs_failed) {
+		if (ext->rs_left <= ext->rs_failed) {
 			ext->rs_failed = 0;
-
-			udw = kmalloc(sizeof(*udw), GFP_ATOMIC);
-			if (udw) {
-				udw->enr = ext->lce.lc_number;
-				udw->w.cb = w_update_odbm;
-				udw->device = device;
-				drbd_queue_work_front(&first_peer_device(device)->connection->sender_work,
-						      &udw->w);
-			} else {
-				drbd_warn(device, "Could not kmalloc an udw\n");
-			}
+			return true;
 		}
-	} else {
+	} else if (mode != SET_OUT_OF_SYNC) {
+		/* be quiet if lc_find() did not find it. */
 		drbd_err(device, "lc_get() failed! locked=%d/%d flags=%lu\n",
 		    device->resync_locked,
 		    device->resync->nr_elements,
 		    device->resync->flags);
 	}
+	return false;
 }
 
 void drbd_advance_rs_marks(struct drbd_device *device, unsigned long still_to_go)
@@ -827,6 +749,76 @@
 	}
 }
 
+/* It is called lazy update, so don't do write-out too often. */
+static bool lazy_bitmap_update_due(struct drbd_device *device)
+{
+	return time_after(jiffies, device->rs_last_bcast + 2*HZ);
+}
+
+static void maybe_schedule_on_disk_bitmap_update(struct drbd_device *device, bool rs_done)
+{
+	if (rs_done)
+		set_bit(RS_DONE, &device->flags);
+		/* and also set RS_PROGRESS below */
+	else if (!lazy_bitmap_update_due(device))
+		return;
+
+	drbd_device_post_work(device, RS_PROGRESS);
+}
+
+static int update_sync_bits(struct drbd_device *device,
+		unsigned long sbnr, unsigned long ebnr,
+		enum update_sync_bits_mode mode)
+{
+	/*
+	 * We keep a count of set bits per resync-extent in the ->rs_left
+	 * caching member, so we need to loop and work within the resync extent
+	 * alignment. Typically this loop will execute exactly once.
+	 */
+	unsigned long flags;
+	unsigned long count = 0;
+	unsigned int cleared = 0;
+	while (sbnr <= ebnr) {
+		/* set temporary boundary bit number to last bit number within
+		 * the resync extent of the current start bit number,
+		 * but cap at provided end bit number */
+		unsigned long tbnr = min(ebnr, sbnr | BM_BLOCKS_PER_BM_EXT_MASK);
+		unsigned long c;
+
+		if (mode == RECORD_RS_FAILED)
+			/* Only called from drbd_rs_failed_io(), bits
+			 * supposedly still set.  Recount, maybe some
+			 * of the bits have been successfully cleared
+			 * by application IO meanwhile.
+			 */
+			c = drbd_bm_count_bits(device, sbnr, tbnr);
+		else if (mode == SET_IN_SYNC)
+			c = drbd_bm_clear_bits(device, sbnr, tbnr);
+		else /* if (mode == SET_OUT_OF_SYNC) */
+			c = drbd_bm_set_bits(device, sbnr, tbnr);
+
+		if (c) {
+			spin_lock_irqsave(&device->al_lock, flags);
+			cleared += update_rs_extent(device, BM_BIT_TO_EXT(sbnr), c, mode);
+			spin_unlock_irqrestore(&device->al_lock, flags);
+			count += c;
+		}
+		sbnr = tbnr + 1;
+	}
+	if (count) {
+		if (mode == SET_IN_SYNC) {
+			unsigned long still_to_go = drbd_bm_total_weight(device);
+			bool rs_is_done = (still_to_go <= device->rs_failed);
+			drbd_advance_rs_marks(device, still_to_go);
+			if (cleared || rs_is_done)
+				maybe_schedule_on_disk_bitmap_update(device, rs_is_done);
+		} else if (mode == RECORD_RS_FAILED)
+			device->rs_failed += count;
+		wake_up(&device->al_wait);
+	}
+	return count;
+}
+
 /* clear the bit corresponding to the piece of storage in question:
  * size byte of data starting from sector.  Only clear a bits of the affected
  * one ore more _aligned_ BM_BLOCK_SIZE blocks.
@@ -834,24 +826,28 @@
  * called by worker on C_SYNC_TARGET and receiver on SyncSource.
  *
  */
-void __drbd_set_in_sync(struct drbd_device *device, sector_t sector, int size,
-		       const char *file, const unsigned int line)
+int __drbd_change_sync(struct drbd_device *device, sector_t sector, int size,
+		enum update_sync_bits_mode mode,
+		const char *file, const unsigned int line)
 {
 	/* Is called from worker and receiver context _only_ */
 	unsigned long sbnr, ebnr, lbnr;
 	unsigned long count = 0;
 	sector_t esector, nr_sectors;
-	int wake_up = 0;
-	unsigned long flags;
+
+	/* This would be an empty REQ_FLUSH, be silent. */
+	if ((mode == SET_OUT_OF_SYNC) && size == 0)
+		return 0;
 
 	if (size <= 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_DISCARD_SIZE) {
-		drbd_err(device, "drbd_set_in_sync: sector=%llus size=%d nonsense!\n",
+		drbd_err(device, "%s: sector=%llus size=%d nonsense!\n",
+				drbd_change_sync_fname[mode],
 				(unsigned long long)sector, size);
-		return;
+		return 0;
 	}
 
 	if (!get_ldev(device))
-		return; /* no disk, no metadata, no bitmap to clear bits in */
+		return 0; /* no disk, no metadata, no bitmap to manipulate bits in */
 
 	nr_sectors = drbd_get_capacity(device->this_bdev);
 	esector = sector + (size >> 9) - 1;
@@ -863,97 +859,26 @@
 
 	lbnr = BM_SECT_TO_BIT(nr_sectors-1);
 
-	/* we clear it (in sync).
-	 * round up start sector, round down end sector.  we make sure we only
-	 * clear full, aligned, BM_BLOCK_SIZE (4K) blocks */
-	if (unlikely(esector < BM_SECT_PER_BIT-1))
-		goto out;
-	if (unlikely(esector == (nr_sectors-1)))
-		ebnr = lbnr;
-	else
-		ebnr = BM_SECT_TO_BIT(esector - (BM_SECT_PER_BIT-1));
-	sbnr = BM_SECT_TO_BIT(sector + BM_SECT_PER_BIT-1);
-
-	if (sbnr > ebnr)
-		goto out;
-
-	/*
-	 * ok, (capacity & 7) != 0 sometimes, but who cares...
-	 * we count rs_{total,left} in bits, not sectors.
-	 */
-	count = drbd_bm_clear_bits(device, sbnr, ebnr);
-	if (count) {
-		drbd_advance_rs_marks(device, drbd_bm_total_weight(device));
-		spin_lock_irqsave(&device->al_lock, flags);
-		drbd_try_clear_on_disk_bm(device, sector, count, true);
-		spin_unlock_irqrestore(&device->al_lock, flags);
-
-		/* just wake_up unconditional now, various lc_chaged(),
-		 * lc_put() in drbd_try_clear_on_disk_bm(). */
-		wake_up = 1;
-	}
-out:
-	put_ldev(device);
-	if (wake_up)
-		wake_up(&device->al_wait);
-}
-
-/*
- * this is intended to set one request worth of data out of sync.
- * affects at least 1 bit,
- * and at most 1+DRBD_MAX_BIO_SIZE/BM_BLOCK_SIZE bits.
- *
- * called by tl_clear and drbd_send_dblock (==drbd_make_request).
- * so this can be _any_ process.
- */
-int __drbd_set_out_of_sync(struct drbd_device *device, sector_t sector, int size,
-			    const char *file, const unsigned int line)
-{
-	unsigned long sbnr, ebnr, flags;
-	sector_t esector, nr_sectors;
-	unsigned int enr, count = 0;
-	struct lc_element *e;
-
-	/* this should be an empty REQ_FLUSH */
-	if (size == 0)
-		return 0;
-
-	if (size < 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_DISCARD_SIZE) {
-		drbd_err(device, "sector: %llus, size: %d\n",
-			(unsigned long long)sector, size);
-		return 0;
+	if (mode == SET_IN_SYNC) {
+		/* Round up start sector, round down end sector.  We make sure
+		 * we only clear full, aligned, BM_BLOCK_SIZE blocks. */
+		if (unlikely(esector < BM_SECT_PER_BIT-1))
+			goto out;
+		if (unlikely(esector == (nr_sectors-1)))
+			ebnr = lbnr;
+		else
+			ebnr = BM_SECT_TO_BIT(esector - (BM_SECT_PER_BIT-1));
+		sbnr = BM_SECT_TO_BIT(sector + BM_SECT_PER_BIT-1);
+	} else {
+		/* We set it out of sync, or record resync failure.
+		 * Should not round anything here. */
+		sbnr = BM_SECT_TO_BIT(sector);
+		ebnr = BM_SECT_TO_BIT(esector);
 	}
 
-	if (!get_ldev(device))
-		return 0; /* no disk, no metadata, no bitmap to set bits in */
-
-	nr_sectors = drbd_get_capacity(device->this_bdev);
-	esector = sector + (size >> 9) - 1;
-
-	if (!expect(sector < nr_sectors))
-		goto out;
-	if (!expect(esector < nr_sectors))
-		esector = nr_sectors - 1;
-
-	/* we set it out of sync,
-	 * we do not need to round anything here */
-	sbnr = BM_SECT_TO_BIT(sector);
-	ebnr = BM_SECT_TO_BIT(esector);
-
-	/* ok, (capacity & 7) != 0 sometimes, but who cares...
-	 * we count rs_{total,left} in bits, not sectors.  */
-	spin_lock_irqsave(&device->al_lock, flags);
-	count = drbd_bm_set_bits(device, sbnr, ebnr);
-
-	enr = BM_SECT_TO_EXT(sector);
-	e = lc_find(device->resync, enr);
-	if (e)
-		lc_entry(e, struct bm_extent, lce)->rs_left += count;
-	spin_unlock_irqrestore(&device->al_lock, flags);
-
+	count = update_sync_bits(device, sbnr, ebnr, mode);
 out:
 	put_ldev(device);
-
 	return count;
 }
 
@@ -1075,6 +1000,15 @@
 	struct lc_element *e;
 	struct bm_extent *bm_ext;
 	int i;
+	bool throttle = drbd_rs_should_slow_down(device, sector, true);
+
+	/* If we need to throttle, a half-locked (only marked BME_NO_WRITES,
+	 * not yet BME_LOCKED) extent needs to be kicked out explicitly if we
+	 * need to throttle. There is at most one such half-locked extent,
+	 * which is remembered in resync_wenr. */
+
+	if (throttle && device->resync_wenr != enr)
+		return -EAGAIN;
 
 	spin_lock_irq(&device->al_lock);
 	if (device->resync_wenr != LC_FREE && device->resync_wenr != enr) {
@@ -1098,8 +1032,10 @@
 			D_ASSERT(device, test_bit(BME_NO_WRITES, &bm_ext->flags));
 			clear_bit(BME_NO_WRITES, &bm_ext->flags);
 			device->resync_wenr = LC_FREE;
-			if (lc_put(device->resync, &bm_ext->lce) == 0)
+			if (lc_put(device->resync, &bm_ext->lce) == 0) {
+				bm_ext->flags = 0;
 				device->resync_locked--;
+			}
 			wake_up(&device->al_wait);
 		} else {
 			drbd_alert(device, "LOGIC BUG\n");
@@ -1161,8 +1097,20 @@
 	return 0;
 
 try_again:
-	if (bm_ext)
-		device->resync_wenr = enr;
+	if (bm_ext) {
+		if (throttle) {
+			D_ASSERT(device, !test_bit(BME_LOCKED, &bm_ext->flags));
+			D_ASSERT(device, test_bit(BME_NO_WRITES, &bm_ext->flags));
+			clear_bit(BME_NO_WRITES, &bm_ext->flags);
+			device->resync_wenr = LC_FREE;
+			if (lc_put(device->resync, &bm_ext->lce) == 0) {
+				bm_ext->flags = 0;
+				device->resync_locked--;
+			}
+			wake_up(&device->al_wait);
+		} else
+			device->resync_wenr = enr;
+	}
 	spin_unlock_irq(&device->al_lock);
 	return -EAGAIN;
 }
@@ -1270,69 +1218,3 @@
 
 	return 0;
 }
-
-/**
- * drbd_rs_failed_io() - Record information on a failure to resync the specified blocks
- * @device:	DRBD device.
- * @sector:	The sector number.
- * @size:	Size of failed IO operation, in byte.
- */
-void drbd_rs_failed_io(struct drbd_device *device, sector_t sector, int size)
-{
-	/* Is called from worker and receiver context _only_ */
-	unsigned long sbnr, ebnr, lbnr;
-	unsigned long count;
-	sector_t esector, nr_sectors;
-	int wake_up = 0;
-
-	if (size <= 0 || !IS_ALIGNED(size, 512) || size > DRBD_MAX_DISCARD_SIZE) {
-		drbd_err(device, "drbd_rs_failed_io: sector=%llus size=%d nonsense!\n",
-				(unsigned long long)sector, size);
-		return;
-	}
-	nr_sectors = drbd_get_capacity(device->this_bdev);
-	esector = sector + (size >> 9) - 1;
-
-	if (!expect(sector < nr_sectors))
-		return;
-	if (!expect(esector < nr_sectors))
-		esector = nr_sectors - 1;
-
-	lbnr = BM_SECT_TO_BIT(nr_sectors-1);
-
-	/*
-	 * round up start sector, round down end sector.  we make sure we only
-	 * handle full, aligned, BM_BLOCK_SIZE (4K) blocks */
-	if (unlikely(esector < BM_SECT_PER_BIT-1))
-		return;
-	if (unlikely(esector == (nr_sectors-1)))
-		ebnr = lbnr;
-	else
-		ebnr = BM_SECT_TO_BIT(esector - (BM_SECT_PER_BIT-1));
-	sbnr = BM_SECT_TO_BIT(sector + BM_SECT_PER_BIT-1);
-
-	if (sbnr > ebnr)
-		return;
-
-	/*
-	 * ok, (capacity & 7) != 0 sometimes, but who cares...
-	 * we count rs_{total,left} in bits, not sectors.
-	 */
-	spin_lock_irq(&device->al_lock);
-	count = drbd_bm_count_bits(device, sbnr, ebnr);
-	if (count) {
-		device->rs_failed += count;
-
-		if (get_ldev(device)) {
-			drbd_try_clear_on_disk_bm(device, sector, count, false);
-			put_ldev(device);
-		}
-
-		/* just wake_up unconditional now, various lc_chaged(),
-		 * lc_put() in drbd_try_clear_on_disk_bm(). */
-		wake_up = 1;
-	}
-	spin_unlock_irq(&device->al_lock);
-	if (wake_up)
-		wake_up(&device->al_wait);
-}
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 1aa29f8..426c97a 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -22,6 +22,8 @@
    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
+
 #include <linux/bitops.h>
 #include <linux/vmalloc.h>
 #include <linux/string.h>
@@ -353,9 +355,8 @@
 
 	for (i = 0; i < number; i++) {
 		if (!pages[i]) {
-			printk(KERN_ALERT "drbd: bm_free_pages tried to free "
-					  "a NULL pointer; i=%lu n=%lu\n",
-					  i, number);
+			pr_alert("bm_free_pages tried to free a NULL pointer; i=%lu n=%lu\n",
+				 i, number);
 			continue;
 		}
 		__free_page(pages[i]);
@@ -592,7 +593,7 @@
 	end = offset + len;
 
 	if (end > b->bm_words) {
-		printk(KERN_ALERT "drbd: bm_memset end > bm_words\n");
+		pr_alert("bm_memset end > bm_words\n");
 		return;
 	}
 
@@ -602,7 +603,7 @@
 		p_addr = bm_map_pidx(b, idx);
 		bm = p_addr + MLPP(offset);
 		if (bm+do_now > p_addr + LWPP) {
-			printk(KERN_ALERT "drbd: BUG BUG BUG! p_addr:%p bm:%p do_now:%d\n",
+			pr_alert("BUG BUG BUG! p_addr:%p bm:%p do_now:%d\n",
 			       p_addr, bm, (int)do_now);
 		} else
 			memset(bm, c, do_now * sizeof(long));
@@ -927,22 +928,14 @@
 	spin_unlock_irq(&b->bm_lock);
 }
 
-struct bm_aio_ctx {
-	struct drbd_device *device;
-	atomic_t in_flight;
-	unsigned int done;
-	unsigned flags;
-#define BM_AIO_COPY_PAGES	1
-#define BM_AIO_WRITE_HINTED	2
-#define BM_WRITE_ALL_PAGES	4
-	int error;
-	struct kref kref;
-};
-
-static void bm_aio_ctx_destroy(struct kref *kref)
+static void drbd_bm_aio_ctx_destroy(struct kref *kref)
 {
-	struct bm_aio_ctx *ctx = container_of(kref, struct bm_aio_ctx, kref);
+	struct drbd_bm_aio_ctx *ctx = container_of(kref, struct drbd_bm_aio_ctx, kref);
+	unsigned long flags;
 
+	spin_lock_irqsave(&ctx->device->resource->req_lock, flags);
+	list_del(&ctx->list);
+	spin_unlock_irqrestore(&ctx->device->resource->req_lock, flags);
 	put_ldev(ctx->device);
 	kfree(ctx);
 }
@@ -950,7 +943,7 @@
 /* bv_page may be a copy, or may be the original */
 static void bm_async_io_complete(struct bio *bio, int error)
 {
-	struct bm_aio_ctx *ctx = bio->bi_private;
+	struct drbd_bm_aio_ctx *ctx = bio->bi_private;
 	struct drbd_device *device = ctx->device;
 	struct drbd_bitmap *b = device->bitmap;
 	unsigned int idx = bm_page_to_idx(bio->bi_io_vec[0].bv_page);
@@ -993,17 +986,18 @@
 	if (atomic_dec_and_test(&ctx->in_flight)) {
 		ctx->done = 1;
 		wake_up(&device->misc_wait);
-		kref_put(&ctx->kref, &bm_aio_ctx_destroy);
+		kref_put(&ctx->kref, &drbd_bm_aio_ctx_destroy);
 	}
 }
 
-static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must_hold(local)
+static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_hold(local)
 {
 	struct bio *bio = bio_alloc_drbd(GFP_NOIO);
 	struct drbd_device *device = ctx->device;
 	struct drbd_bitmap *b = device->bitmap;
 	struct page *page;
 	unsigned int len;
+	unsigned int rw = (ctx->flags & BM_AIO_READ) ? READ : WRITE;
 
 	sector_t on_disk_sector =
 		device->ldev->md.md_offset + device->ldev->md.bm_offset;
@@ -1049,9 +1043,9 @@
 /*
  * bm_rw: read/write the whole bitmap from/to its on disk location.
  */
-static int bm_rw(struct drbd_device *device, int rw, unsigned flags, unsigned lazy_writeout_upper_idx) __must_hold(local)
+static int bm_rw(struct drbd_device *device, const unsigned int flags, unsigned lazy_writeout_upper_idx) __must_hold(local)
 {
-	struct bm_aio_ctx *ctx;
+	struct drbd_bm_aio_ctx *ctx;
 	struct drbd_bitmap *b = device->bitmap;
 	int num_pages, i, count = 0;
 	unsigned long now;
@@ -1067,12 +1061,13 @@
 	 * as we submit copies of pages anyways.
 	 */
 
-	ctx = kmalloc(sizeof(struct bm_aio_ctx), GFP_NOIO);
+	ctx = kmalloc(sizeof(struct drbd_bm_aio_ctx), GFP_NOIO);
 	if (!ctx)
 		return -ENOMEM;
 
-	*ctx = (struct bm_aio_ctx) {
+	*ctx = (struct drbd_bm_aio_ctx) {
 		.device = device,
+		.start_jif = jiffies,
 		.in_flight = ATOMIC_INIT(1),
 		.done = 0,
 		.flags = flags,
@@ -1080,15 +1075,21 @@
 		.kref = { ATOMIC_INIT(2) },
 	};
 
-	if (!get_ldev_if_state(device, D_ATTACHING)) {  /* put is in bm_aio_ctx_destroy() */
+	if (!get_ldev_if_state(device, D_ATTACHING)) {  /* put is in drbd_bm_aio_ctx_destroy() */
 		drbd_err(device, "ASSERT FAILED: get_ldev_if_state() == 1 in bm_rw()\n");
 		kfree(ctx);
 		return -ENODEV;
 	}
+	/* Here D_ATTACHING is sufficient since drbd_bm_read() is called only from
+	   drbd_adm_attach(), after device->ldev was assigned. */
 
-	if (!ctx->flags)
+	if (0 == (ctx->flags & ~BM_AIO_READ))
 		WARN_ON(!(BM_LOCKED_MASK & b->bm_flags));
 
+	spin_lock_irq(&device->resource->req_lock);
+	list_add_tail(&ctx->list, &device->pending_bitmap_io);
+	spin_unlock_irq(&device->resource->req_lock);
+
 	num_pages = b->bm_number_of_pages;
 
 	now = jiffies;
@@ -1098,13 +1099,13 @@
 		/* ignore completely unchanged pages */
 		if (lazy_writeout_upper_idx && i == lazy_writeout_upper_idx)
 			break;
-		if (rw & WRITE) {
+		if (!(flags & BM_AIO_READ)) {
 			if ((flags & BM_AIO_WRITE_HINTED) &&
 			    !test_and_clear_bit(BM_PAGE_HINT_WRITEOUT,
 				    &page_private(b->bm_pages[i])))
 				continue;
 
-			if (!(flags & BM_WRITE_ALL_PAGES) &&
+			if (!(flags & BM_AIO_WRITE_ALL_PAGES) &&
 			    bm_test_page_unchanged(b->bm_pages[i])) {
 				dynamic_drbd_dbg(device, "skipped bm write for idx %u\n", i);
 				continue;
@@ -1118,7 +1119,7 @@
 			}
 		}
 		atomic_inc(&ctx->in_flight);
-		bm_page_io_async(ctx, i, rw);
+		bm_page_io_async(ctx, i);
 		++count;
 		cond_resched();
 	}
@@ -1134,12 +1135,12 @@
 	if (!atomic_dec_and_test(&ctx->in_flight))
 		wait_until_done_or_force_detached(device, device->ldev, &ctx->done);
 	else
-		kref_put(&ctx->kref, &bm_aio_ctx_destroy);
+		kref_put(&ctx->kref, &drbd_bm_aio_ctx_destroy);
 
 	/* summary for global bitmap IO */
 	if (flags == 0)
 		drbd_info(device, "bitmap %s of %u pages took %lu jiffies\n",
-			 rw == WRITE ? "WRITE" : "READ",
+			 (flags & BM_AIO_READ) ? "READ" : "WRITE",
 			 count, jiffies - now);
 
 	if (ctx->error) {
@@ -1152,20 +1153,18 @@
 		err = -EIO; /* Disk timeout/force-detach during IO... */
 
 	now = jiffies;
-	if (rw == WRITE) {
-		drbd_md_flush(device);
-	} else /* rw == READ */ {
+	if (flags & BM_AIO_READ) {
 		b->bm_set = bm_count_bits(b);
 		drbd_info(device, "recounting of set bits took additional %lu jiffies\n",
 		     jiffies - now);
 	}
 	now = b->bm_set;
 
-	if (flags == 0)
+	if ((flags & ~BM_AIO_READ) == 0)
 		drbd_info(device, "%s (%lu bits) marked out-of-sync by on disk bit-map.\n",
 		     ppsize(ppb, now << (BM_BLOCK_SHIFT-10)), now);
 
-	kref_put(&ctx->kref, &bm_aio_ctx_destroy);
+	kref_put(&ctx->kref, &drbd_bm_aio_ctx_destroy);
 	return err;
 }
 
@@ -1175,7 +1174,7 @@
  */
 int drbd_bm_read(struct drbd_device *device) __must_hold(local)
 {
-	return bm_rw(device, READ, 0, 0);
+	return bm_rw(device, BM_AIO_READ, 0);
 }
 
 /**
@@ -1186,7 +1185,7 @@
  */
 int drbd_bm_write(struct drbd_device *device) __must_hold(local)
 {
-	return bm_rw(device, WRITE, 0, 0);
+	return bm_rw(device, 0, 0);
 }
 
 /**
@@ -1197,7 +1196,17 @@
  */
 int drbd_bm_write_all(struct drbd_device *device) __must_hold(local)
 {
-	return bm_rw(device, WRITE, BM_WRITE_ALL_PAGES, 0);
+	return bm_rw(device, BM_AIO_WRITE_ALL_PAGES, 0);
+}
+
+/**
+ * drbd_bm_write_lazy() - Write bitmap pages 0 to @upper_idx-1, if they have changed.
+ * @device:	DRBD device.
+ * @upper_idx:	0: write all changed pages; +ve: page index to stop scanning for changed pages
+ */
+int drbd_bm_write_lazy(struct drbd_device *device, unsigned upper_idx) __must_hold(local)
+{
+	return bm_rw(device, BM_AIO_COPY_PAGES, upper_idx);
 }
 
 /**
@@ -1213,7 +1222,7 @@
  */
 int drbd_bm_write_copy_pages(struct drbd_device *device) __must_hold(local)
 {
-	return bm_rw(device, WRITE, BM_AIO_COPY_PAGES, 0);
+	return bm_rw(device, BM_AIO_COPY_PAGES, 0);
 }
 
 /**
@@ -1222,62 +1231,7 @@
  */
 int drbd_bm_write_hinted(struct drbd_device *device) __must_hold(local)
 {
-	return bm_rw(device, WRITE, BM_AIO_WRITE_HINTED | BM_AIO_COPY_PAGES, 0);
-}
-
-/**
- * drbd_bm_write_page() - Writes a PAGE_SIZE aligned piece of bitmap
- * @device:	DRBD device.
- * @idx:	bitmap page index
- *
- * We don't want to special case on logical_block_size of the backend device,
- * so we submit PAGE_SIZE aligned pieces.
- * Note that on "most" systems, PAGE_SIZE is 4k.
- *
- * In case this becomes an issue on systems with larger PAGE_SIZE,
- * we may want to change this again to write 4k aligned 4k pieces.
- */
-int drbd_bm_write_page(struct drbd_device *device, unsigned int idx) __must_hold(local)
-{
-	struct bm_aio_ctx *ctx;
-	int err;
-
-	if (bm_test_page_unchanged(device->bitmap->bm_pages[idx])) {
-		dynamic_drbd_dbg(device, "skipped bm page write for idx %u\n", idx);
-		return 0;
-	}
-
-	ctx = kmalloc(sizeof(struct bm_aio_ctx), GFP_NOIO);
-	if (!ctx)
-		return -ENOMEM;
-
-	*ctx = (struct bm_aio_ctx) {
-		.device = device,
-		.in_flight = ATOMIC_INIT(1),
-		.done = 0,
-		.flags = BM_AIO_COPY_PAGES,
-		.error = 0,
-		.kref = { ATOMIC_INIT(2) },
-	};
-
-	if (!get_ldev_if_state(device, D_ATTACHING)) {  /* put is in bm_aio_ctx_destroy() */
-		drbd_err(device, "ASSERT FAILED: get_ldev_if_state() == 1 in drbd_bm_write_page()\n");
-		kfree(ctx);
-		return -ENODEV;
-	}
-
-	bm_page_io_async(ctx, idx, WRITE_SYNC);
-	wait_until_done_or_force_detached(device, device->ldev, &ctx->done);
-
-	if (ctx->error)
-		drbd_chk_io_error(device, 1, DRBD_META_IO_ERROR);
-		/* that causes us to detach, so the in memory bitmap will be
-		 * gone in a moment as well. */
-
-	device->bm_writ_cnt++;
-	err = atomic_read(&ctx->in_flight) ? -EIO : ctx->error;
-	kref_put(&ctx->kref, &bm_aio_ctx_destroy);
-	return err;
+	return bm_rw(device, BM_AIO_WRITE_HINTED | BM_AIO_COPY_PAGES, 0);
 }
 
 /* NOTE
diff --git a/drivers/block/drbd/drbd_debugfs.c b/drivers/block/drbd/drbd_debugfs.c
new file mode 100644
index 0000000..5c20b18
--- /dev/null
+++ b/drivers/block/drbd/drbd_debugfs.c
@@ -0,0 +1,958 @@
+#define pr_fmt(fmt) "drbd debugfs: " fmt
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/stat.h>
+#include <linux/jiffies.h>
+#include <linux/list.h>
+
+#include "drbd_int.h"
+#include "drbd_req.h"
+#include "drbd_debugfs.h"
+
+
+/**********************************************************************
+ * Whenever you change the file format, remember to bump the version. *
+ **********************************************************************/
+
+static struct dentry *drbd_debugfs_root;
+static struct dentry *drbd_debugfs_version;
+static struct dentry *drbd_debugfs_resources;
+static struct dentry *drbd_debugfs_minors;
+
+static void seq_print_age_or_dash(struct seq_file *m, bool valid, unsigned long dt)
+{
+	if (valid)
+		seq_printf(m, "\t%d", jiffies_to_msecs(dt));
+	else
+		seq_printf(m, "\t-");
+}
+
+static void __seq_print_rq_state_bit(struct seq_file *m,
+	bool is_set, char *sep, const char *set_name, const char *unset_name)
+{
+	if (is_set && set_name) {
+		seq_putc(m, *sep);
+		seq_puts(m, set_name);
+		*sep = '|';
+	} else if (!is_set && unset_name) {
+		seq_putc(m, *sep);
+		seq_puts(m, unset_name);
+		*sep = '|';
+	}
+}
+
+static void seq_print_rq_state_bit(struct seq_file *m,
+	bool is_set, char *sep, const char *set_name)
+{
+	__seq_print_rq_state_bit(m, is_set, sep, set_name, NULL);
+}
+
+/* pretty print enum drbd_req_state_bits req->rq_state */
+static void seq_print_request_state(struct seq_file *m, struct drbd_request *req)
+{
+	unsigned int s = req->rq_state;
+	char sep = ' ';
+	seq_printf(m, "\t0x%08x", s);
+	seq_printf(m, "\tmaster: %s", req->master_bio ? "pending" : "completed");
+
+	/* RQ_WRITE ignored, already reported */
+	seq_puts(m, "\tlocal:");
+	seq_print_rq_state_bit(m, s & RQ_IN_ACT_LOG, &sep, "in-AL");
+	seq_print_rq_state_bit(m, s & RQ_POSTPONED, &sep, "postponed");
+	seq_print_rq_state_bit(m, s & RQ_COMPLETION_SUSP, &sep, "suspended");
+	sep = ' ';
+	seq_print_rq_state_bit(m, s & RQ_LOCAL_PENDING, &sep, "pending");
+	seq_print_rq_state_bit(m, s & RQ_LOCAL_COMPLETED, &sep, "completed");
+	seq_print_rq_state_bit(m, s & RQ_LOCAL_ABORTED, &sep, "aborted");
+	seq_print_rq_state_bit(m, s & RQ_LOCAL_OK, &sep, "ok");
+	if (sep == ' ')
+		seq_puts(m, " -");
+
+	/* for_each_connection ... */
+	seq_printf(m, "\tnet:");
+	sep = ' ';
+	seq_print_rq_state_bit(m, s & RQ_NET_PENDING, &sep, "pending");
+	seq_print_rq_state_bit(m, s & RQ_NET_QUEUED, &sep, "queued");
+	seq_print_rq_state_bit(m, s & RQ_NET_SENT, &sep, "sent");
+	seq_print_rq_state_bit(m, s & RQ_NET_DONE, &sep, "done");
+	seq_print_rq_state_bit(m, s & RQ_NET_SIS, &sep, "sis");
+	seq_print_rq_state_bit(m, s & RQ_NET_OK, &sep, "ok");
+	if (sep == ' ')
+		seq_puts(m, " -");
+
+	seq_printf(m, " :");
+	sep = ' ';
+	seq_print_rq_state_bit(m, s & RQ_EXP_RECEIVE_ACK, &sep, "B");
+	seq_print_rq_state_bit(m, s & RQ_EXP_WRITE_ACK, &sep, "C");
+	seq_print_rq_state_bit(m, s & RQ_EXP_BARR_ACK, &sep, "barr");
+	if (sep == ' ')
+		seq_puts(m, " -");
+	seq_printf(m, "\n");
+}
+
+static void seq_print_one_request(struct seq_file *m, struct drbd_request *req, unsigned long now)
+{
+	/* change anything here, fixup header below! */
+	unsigned int s = req->rq_state;
+
+#define RQ_HDR_1 "epoch\tsector\tsize\trw"
+	seq_printf(m, "0x%x\t%llu\t%u\t%s",
+		req->epoch,
+		(unsigned long long)req->i.sector, req->i.size >> 9,
+		(s & RQ_WRITE) ? "W" : "R");
+
+#define RQ_HDR_2 "\tstart\tin AL\tsubmit"
+	seq_printf(m, "\t%d", jiffies_to_msecs(now - req->start_jif));
+	seq_print_age_or_dash(m, s & RQ_IN_ACT_LOG, now - req->in_actlog_jif);
+	seq_print_age_or_dash(m, s & RQ_LOCAL_PENDING, now - req->pre_submit_jif);
+
+#define RQ_HDR_3 "\tsent\tacked\tdone"
+	seq_print_age_or_dash(m, s & RQ_NET_SENT, now - req->pre_send_jif);
+	seq_print_age_or_dash(m, (s & RQ_NET_SENT) && !(s & RQ_NET_PENDING), now - req->acked_jif);
+	seq_print_age_or_dash(m, s & RQ_NET_DONE, now - req->net_done_jif);
+
+#define RQ_HDR_4 "\tstate\n"
+	seq_print_request_state(m, req);
+}
+#define RQ_HDR RQ_HDR_1 RQ_HDR_2 RQ_HDR_3 RQ_HDR_4
+
+static void seq_print_minor_vnr_req(struct seq_file *m, struct drbd_request *req, unsigned long now)
+{
+	seq_printf(m, "%u\t%u\t", req->device->minor, req->device->vnr);
+	seq_print_one_request(m, req, now);
+}
+
+static void seq_print_resource_pending_meta_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
+{
+	struct drbd_device *device;
+	unsigned int i;
+
+	seq_puts(m, "minor\tvnr\tstart\tsubmit\tintent\n");
+	rcu_read_lock();
+	idr_for_each_entry(&resource->devices, device, i) {
+		struct drbd_md_io tmp;
+		/* In theory this is racy,
+		 * in the sense that there could have been a
+		 * drbd_md_put_buffer(); drbd_md_get_buffer();
+		 * between accessing these members here.  */
+		tmp = device->md_io;
+		if (atomic_read(&tmp.in_use)) {
+			seq_printf(m, "%u\t%u\t%d\t",
+				device->minor, device->vnr,
+				jiffies_to_msecs(now - tmp.start_jif));
+			if (time_before(tmp.submit_jif, tmp.start_jif))
+				seq_puts(m, "-\t");
+			else
+				seq_printf(m, "%d\t", jiffies_to_msecs(now - tmp.submit_jif));
+			seq_printf(m, "%s\n", tmp.current_use);
+		}
+	}
+	rcu_read_unlock();
+}
+
+static void seq_print_waiting_for_AL(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
+{
+	struct drbd_device *device;
+	unsigned int i;
+
+	seq_puts(m, "minor\tvnr\tage\t#waiting\n");
+	rcu_read_lock();
+	idr_for_each_entry(&resource->devices, device, i) {
+		unsigned long jif;
+		struct drbd_request *req;
+		int n = atomic_read(&device->ap_actlog_cnt);
+		if (n) {
+			spin_lock_irq(&device->resource->req_lock);
+			req = list_first_entry_or_null(&device->pending_master_completion[1],
+				struct drbd_request, req_pending_master_completion);
+			/* if the oldest request does not wait for the activity log
+			 * it is not interesting for us here */
+			if (req && !(req->rq_state & RQ_IN_ACT_LOG))
+				jif = req->start_jif;
+			else
+				req = NULL;
+			spin_unlock_irq(&device->resource->req_lock);
+		}
+		if (n) {
+			seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
+			if (req)
+				seq_printf(m, "%u\t", jiffies_to_msecs(now - jif));
+			else
+				seq_puts(m, "-\t");
+			seq_printf(m, "%u\n", n);
+		}
+	}
+	rcu_read_unlock();
+}
+
+static void seq_print_device_bitmap_io(struct seq_file *m, struct drbd_device *device, unsigned long now)
+{
+	struct drbd_bm_aio_ctx *ctx;
+	unsigned long start_jif;
+	unsigned int in_flight;
+	unsigned int flags;
+	spin_lock_irq(&device->resource->req_lock);
+	ctx = list_first_entry_or_null(&device->pending_bitmap_io, struct drbd_bm_aio_ctx, list);
+	if (ctx && ctx->done)
+		ctx = NULL;
+	if (ctx) {
+		start_jif = ctx->start_jif;
+		in_flight = atomic_read(&ctx->in_flight);
+		flags = ctx->flags;
+	}
+	spin_unlock_irq(&device->resource->req_lock);
+	if (ctx) {
+		seq_printf(m, "%u\t%u\t%c\t%u\t%u\n",
+			device->minor, device->vnr,
+			(flags & BM_AIO_READ) ? 'R' : 'W',
+			jiffies_to_msecs(now - start_jif),
+			in_flight);
+	}
+}
+
+static void seq_print_resource_pending_bitmap_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
+{
+	struct drbd_device *device;
+	unsigned int i;
+
+	seq_puts(m, "minor\tvnr\trw\tage\t#in-flight\n");
+	rcu_read_lock();
+	idr_for_each_entry(&resource->devices, device, i) {
+		seq_print_device_bitmap_io(m, device, now);
+	}
+	rcu_read_unlock();
+}
+
+/* pretty print enum peer_req->flags */
+static void seq_print_peer_request_flags(struct seq_file *m, struct drbd_peer_request *peer_req)
+{
+	unsigned long f = peer_req->flags;
+	char sep = ' ';
+
+	__seq_print_rq_state_bit(m, f & EE_SUBMITTED, &sep, "submitted", "preparing");
+	__seq_print_rq_state_bit(m, f & EE_APPLICATION, &sep, "application", "internal");
+	seq_print_rq_state_bit(m, f & EE_CALL_AL_COMPLETE_IO, &sep, "in-AL");
+	seq_print_rq_state_bit(m, f & EE_SEND_WRITE_ACK, &sep, "C");
+	seq_print_rq_state_bit(m, f & EE_MAY_SET_IN_SYNC, &sep, "set-in-sync");
+
+	if (f & EE_IS_TRIM) {
+		seq_putc(m, sep);
+		sep = '|';
+		if (f & EE_IS_TRIM_USE_ZEROOUT)
+			seq_puts(m, "zero-out");
+		else
+			seq_puts(m, "trim");
+	}
+	seq_putc(m, '\n');
+}
+
+static void seq_print_peer_request(struct seq_file *m,
+	struct drbd_device *device, struct list_head *lh,
+	unsigned long now)
+{
+	bool reported_preparing = false;
+	struct drbd_peer_request *peer_req;
+	list_for_each_entry(peer_req, lh, w.list) {
+		if (reported_preparing && !(peer_req->flags & EE_SUBMITTED))
+			continue;
+
+		if (device)
+			seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
+
+		seq_printf(m, "%llu\t%u\t%c\t%u\t",
+			(unsigned long long)peer_req->i.sector, peer_req->i.size >> 9,
+			(peer_req->flags & EE_WRITE) ? 'W' : 'R',
+			jiffies_to_msecs(now - peer_req->submit_jif));
+		seq_print_peer_request_flags(m, peer_req);
+		if (peer_req->flags & EE_SUBMITTED)
+			break;
+		else
+			reported_preparing = true;
+	}
+}
+
+static void seq_print_device_peer_requests(struct seq_file *m,
+	struct drbd_device *device, unsigned long now)
+{
+	seq_puts(m, "minor\tvnr\tsector\tsize\trw\tage\tflags\n");
+	spin_lock_irq(&device->resource->req_lock);
+	seq_print_peer_request(m, device, &device->active_ee, now);
+	seq_print_peer_request(m, device, &device->read_ee, now);
+	seq_print_peer_request(m, device, &device->sync_ee, now);
+	spin_unlock_irq(&device->resource->req_lock);
+	if (test_bit(FLUSH_PENDING, &device->flags)) {
+		seq_printf(m, "%u\t%u\t-\t-\tF\t%u\tflush\n",
+			device->minor, device->vnr,
+			jiffies_to_msecs(now - device->flush_jif));
+	}
+}
+
+static void seq_print_resource_pending_peer_requests(struct seq_file *m,
+	struct drbd_resource *resource, unsigned long now)
+{
+	struct drbd_device *device;
+	unsigned int i;
+
+	rcu_read_lock();
+	idr_for_each_entry(&resource->devices, device, i) {
+		seq_print_device_peer_requests(m, device, now);
+	}
+	rcu_read_unlock();
+}
+
+static void seq_print_resource_transfer_log_summary(struct seq_file *m,
+	struct drbd_resource *resource,
+	struct drbd_connection *connection,
+	unsigned long now)
+{
+	struct drbd_request *req;
+	unsigned int count = 0;
+	unsigned int show_state = 0;
+
+	seq_puts(m, "n\tdevice\tvnr\t" RQ_HDR);
+	spin_lock_irq(&resource->req_lock);
+	list_for_each_entry(req, &connection->transfer_log, tl_requests) {
+		unsigned int tmp = 0;
+		unsigned int s;
+		++count;
+
+		/* don't disable irq "forever" */
+		if (!(count & 0x1ff)) {
+			struct drbd_request *req_next;
+			kref_get(&req->kref);
+			spin_unlock_irq(&resource->req_lock);
+			cond_resched();
+			spin_lock_irq(&resource->req_lock);
+			req_next = list_next_entry(req, tl_requests);
+			if (kref_put(&req->kref, drbd_req_destroy))
+				req = req_next;
+			if (&req->tl_requests == &connection->transfer_log)
+				break;
+		}
+
+		s = req->rq_state;
+
+		/* This is meant to summarize timing issues, to be able to tell
+		 * local disk problems from network problems.
+		 * Skip requests, if we have shown an even older request with
+		 * similar aspects already.  */
+		if (req->master_bio == NULL)
+			tmp |= 1;
+		if ((s & RQ_LOCAL_MASK) && (s & RQ_LOCAL_PENDING))
+			tmp |= 2;
+		if (s & RQ_NET_MASK) {
+			if (!(s & RQ_NET_SENT))
+				tmp |= 4;
+			if (s & RQ_NET_PENDING)
+				tmp |= 8;
+			if (!(s & RQ_NET_DONE))
+				tmp |= 16;
+		}
+		if ((tmp & show_state) == tmp)
+			continue;
+		show_state |= tmp;
+		seq_printf(m, "%u\t", count);
+		seq_print_minor_vnr_req(m, req, now);
+		if (show_state == 0x1f)
+			break;
+	}
+	spin_unlock_irq(&resource->req_lock);
+}
+
+/* TODO: transfer_log and friends should be moved to resource */
+static int in_flight_summary_show(struct seq_file *m, void *pos)
+{
+	struct drbd_resource *resource = m->private;
+	struct drbd_connection *connection;
+	unsigned long jif = jiffies;
+
+	connection = first_connection(resource);
+	/* This does not happen, actually.
+	 * But be robust and prepare for future code changes. */
+	if (!connection || !kref_get_unless_zero(&connection->kref))
+		return -ESTALE;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	seq_puts(m, "oldest bitmap IO\n");
+	seq_print_resource_pending_bitmap_io(m, resource, jif);
+	seq_putc(m, '\n');
+
+	seq_puts(m, "meta data IO\n");
+	seq_print_resource_pending_meta_io(m, resource, jif);
+	seq_putc(m, '\n');
+
+	seq_puts(m, "socket buffer stats\n");
+	/* for each connection ... once we have more than one */
+	rcu_read_lock();
+	if (connection->data.socket) {
+		/* open coded SIOCINQ, the "relevant" part */
+		struct tcp_sock *tp = tcp_sk(connection->data.socket->sk);
+		int answ = tp->rcv_nxt - tp->copied_seq;
+		seq_printf(m, "unread receive buffer: %u Byte\n", answ);
+		/* open coded SIOCOUTQ, the "relevant" part */
+		answ = tp->write_seq - tp->snd_una;
+		seq_printf(m, "unacked send buffer: %u Byte\n", answ);
+	}
+	rcu_read_unlock();
+	seq_putc(m, '\n');
+
+	seq_puts(m, "oldest peer requests\n");
+	seq_print_resource_pending_peer_requests(m, resource, jif);
+	seq_putc(m, '\n');
+
+	seq_puts(m, "application requests waiting for activity log\n");
+	seq_print_waiting_for_AL(m, resource, jif);
+	seq_putc(m, '\n');
+
+	seq_puts(m, "oldest application requests\n");
+	seq_print_resource_transfer_log_summary(m, resource, connection, jif);
+	seq_putc(m, '\n');
+
+	jif = jiffies - jif;
+	if (jif)
+		seq_printf(m, "generated in %d ms\n", jiffies_to_msecs(jif));
+	kref_put(&connection->kref, drbd_destroy_connection);
+	return 0;
+}
+
+/* simple_positive(file->f_dentry) respectively debugfs_positive(),
+ * but neither is "reachable" from here.
+ * So we have our own inline version of it above.  :-( */
+static inline int debugfs_positive(struct dentry *dentry)
+{
+        return dentry->d_inode && !d_unhashed(dentry);
+}
+
+/* make sure at *open* time that the respective object won't go away. */
+static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, void *),
+		                void *data, struct kref *kref,
+				void (*release)(struct kref *))
+{
+	struct dentry *parent;
+	int ret = -ESTALE;
+
+	/* Are we still linked,
+	 * or has debugfs_remove() already been called? */
+	parent = file->f_dentry->d_parent;
+	/* not sure if this can happen: */
+	if (!parent || !parent->d_inode)
+		goto out;
+	/* serialize with d_delete() */
+	mutex_lock(&parent->d_inode->i_mutex);
+	/* Make sure the object is still alive */
+	if (debugfs_positive(file->f_dentry)
+	&& kref_get_unless_zero(kref))
+		ret = 0;
+	mutex_unlock(&parent->d_inode->i_mutex);
+	if (!ret) {
+		ret = single_open(file, show, data);
+		if (ret)
+			kref_put(kref, release);
+	}
+out:
+	return ret;
+}
+
+static int in_flight_summary_open(struct inode *inode, struct file *file)
+{
+	struct drbd_resource *resource = inode->i_private;
+	return drbd_single_open(file, in_flight_summary_show, resource,
+				&resource->kref, drbd_destroy_resource);
+}
+
+static int in_flight_summary_release(struct inode *inode, struct file *file)
+{
+	struct drbd_resource *resource = inode->i_private;
+	kref_put(&resource->kref, drbd_destroy_resource);
+	return single_release(inode, file);
+}
+
+static const struct file_operations in_flight_summary_fops = {
+	.owner		= THIS_MODULE,
+	.open		= in_flight_summary_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= in_flight_summary_release,
+};
+
+void drbd_debugfs_resource_add(struct drbd_resource *resource)
+{
+	struct dentry *dentry;
+	if (!drbd_debugfs_resources)
+		return;
+
+	dentry = debugfs_create_dir(resource->name, drbd_debugfs_resources);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	resource->debugfs_res = dentry;
+
+	dentry = debugfs_create_dir("volumes", resource->debugfs_res);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	resource->debugfs_res_volumes = dentry;
+
+	dentry = debugfs_create_dir("connections", resource->debugfs_res);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	resource->debugfs_res_connections = dentry;
+
+	dentry = debugfs_create_file("in_flight_summary", S_IRUSR|S_IRGRP,
+			resource->debugfs_res, resource,
+			&in_flight_summary_fops);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	resource->debugfs_res_in_flight_summary = dentry;
+	return;
+
+fail:
+	drbd_debugfs_resource_cleanup(resource);
+	drbd_err(resource, "failed to create debugfs dentry\n");
+}
+
+static void drbd_debugfs_remove(struct dentry **dp)
+{
+	debugfs_remove(*dp);
+	*dp = NULL;
+}
+
+void drbd_debugfs_resource_cleanup(struct drbd_resource *resource)
+{
+	/* it is ok to call debugfs_remove(NULL) */
+	drbd_debugfs_remove(&resource->debugfs_res_in_flight_summary);
+	drbd_debugfs_remove(&resource->debugfs_res_connections);
+	drbd_debugfs_remove(&resource->debugfs_res_volumes);
+	drbd_debugfs_remove(&resource->debugfs_res);
+}
+
+static void seq_print_one_timing_detail(struct seq_file *m,
+	const struct drbd_thread_timing_details *tdp,
+	unsigned long now)
+{
+	struct drbd_thread_timing_details td;
+	/* No locking...
+	 * use temporary assignment to get at consistent data. */
+	do {
+		td = *tdp;
+	} while (td.cb_nr != tdp->cb_nr);
+	if (!td.cb_addr)
+		return;
+	seq_printf(m, "%u\t%d\t%s:%u\t%ps\n",
+			td.cb_nr,
+			jiffies_to_msecs(now - td.start_jif),
+			td.caller_fn, td.line,
+			td.cb_addr);
+}
+
+static void seq_print_timing_details(struct seq_file *m,
+		const char *title,
+		unsigned int cb_nr, struct drbd_thread_timing_details *tdp, unsigned long now)
+{
+	unsigned int start_idx;
+	unsigned int i;
+
+	seq_printf(m, "%s\n", title);
+	/* If not much is going on, this will result in natural ordering.
+	 * If it is very busy, we will possibly skip events, or even see wrap
+	 * arounds, which could only be avoided with locking.
+	 */
+	start_idx = cb_nr % DRBD_THREAD_DETAILS_HIST;
+	for (i = start_idx; i < DRBD_THREAD_DETAILS_HIST; i++)
+		seq_print_one_timing_detail(m, tdp+i, now);
+	for (i = 0; i < start_idx; i++)
+		seq_print_one_timing_detail(m, tdp+i, now);
+}
+
+static int callback_history_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_connection *connection = m->private;
+	unsigned long jif = jiffies;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	seq_puts(m, "n\tage\tcallsite\tfn\n");
+	seq_print_timing_details(m, "worker", connection->w_cb_nr, connection->w_timing_details, jif);
+	seq_print_timing_details(m, "receiver", connection->r_cb_nr, connection->r_timing_details, jif);
+	return 0;
+}
+
+static int callback_history_open(struct inode *inode, struct file *file)
+{
+	struct drbd_connection *connection = inode->i_private;
+	return drbd_single_open(file, callback_history_show, connection,
+				&connection->kref, drbd_destroy_connection);
+}
+
+static int callback_history_release(struct inode *inode, struct file *file)
+{
+	struct drbd_connection *connection = inode->i_private;
+	kref_put(&connection->kref, drbd_destroy_connection);
+	return single_release(inode, file);
+}
+
+static const struct file_operations connection_callback_history_fops = {
+	.owner		= THIS_MODULE,
+	.open		= callback_history_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= callback_history_release,
+};
+
+static int connection_oldest_requests_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_connection *connection = m->private;
+	unsigned long now = jiffies;
+	struct drbd_request *r1, *r2;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	spin_lock_irq(&connection->resource->req_lock);
+	r1 = connection->req_next;
+	if (r1)
+		seq_print_minor_vnr_req(m, r1, now);
+	r2 = connection->req_ack_pending;
+	if (r2 && r2 != r1) {
+		r1 = r2;
+		seq_print_minor_vnr_req(m, r1, now);
+	}
+	r2 = connection->req_not_net_done;
+	if (r2 && r2 != r1)
+		seq_print_minor_vnr_req(m, r2, now);
+	spin_unlock_irq(&connection->resource->req_lock);
+	return 0;
+}
+
+static int connection_oldest_requests_open(struct inode *inode, struct file *file)
+{
+	struct drbd_connection *connection = inode->i_private;
+	return drbd_single_open(file, connection_oldest_requests_show, connection,
+				&connection->kref, drbd_destroy_connection);
+}
+
+static int connection_oldest_requests_release(struct inode *inode, struct file *file)
+{
+	struct drbd_connection *connection = inode->i_private;
+	kref_put(&connection->kref, drbd_destroy_connection);
+	return single_release(inode, file);
+}
+
+static const struct file_operations connection_oldest_requests_fops = {
+	.owner		= THIS_MODULE,
+	.open		= connection_oldest_requests_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= connection_oldest_requests_release,
+};
+
+void drbd_debugfs_connection_add(struct drbd_connection *connection)
+{
+	struct dentry *conns_dir = connection->resource->debugfs_res_connections;
+	struct dentry *dentry;
+	if (!conns_dir)
+		return;
+
+	/* Once we enable mutliple peers,
+	 * these connections will have descriptive names.
+	 * For now, it is just the one connection to the (only) "peer". */
+	dentry = debugfs_create_dir("peer", conns_dir);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	connection->debugfs_conn = dentry;
+
+	dentry = debugfs_create_file("callback_history", S_IRUSR|S_IRGRP,
+			connection->debugfs_conn, connection,
+			&connection_callback_history_fops);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	connection->debugfs_conn_callback_history = dentry;
+
+	dentry = debugfs_create_file("oldest_requests", S_IRUSR|S_IRGRP,
+			connection->debugfs_conn, connection,
+			&connection_oldest_requests_fops);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	connection->debugfs_conn_oldest_requests = dentry;
+	return;
+
+fail:
+	drbd_debugfs_connection_cleanup(connection);
+	drbd_err(connection, "failed to create debugfs dentry\n");
+}
+
+void drbd_debugfs_connection_cleanup(struct drbd_connection *connection)
+{
+	drbd_debugfs_remove(&connection->debugfs_conn_callback_history);
+	drbd_debugfs_remove(&connection->debugfs_conn_oldest_requests);
+	drbd_debugfs_remove(&connection->debugfs_conn);
+}
+
+static void resync_dump_detail(struct seq_file *m, struct lc_element *e)
+{
+       struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
+
+       seq_printf(m, "%5d %s %s %s\n", bme->rs_left,
+		  test_bit(BME_NO_WRITES, &bme->flags) ? "NO_WRITES" : "---------",
+		  test_bit(BME_LOCKED, &bme->flags) ? "LOCKED" : "------",
+		  test_bit(BME_PRIORITY, &bme->flags) ? "PRIORITY" : "--------"
+		  );
+}
+
+static int device_resync_extents_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_device *device = m->private;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	if (get_ldev_if_state(device, D_FAILED)) {
+		lc_seq_printf_stats(m, device->resync);
+		lc_seq_dump_details(m, device->resync, "rs_left flags", resync_dump_detail);
+		put_ldev(device);
+	}
+	return 0;
+}
+
+static int device_act_log_extents_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_device *device = m->private;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	if (get_ldev_if_state(device, D_FAILED)) {
+		lc_seq_printf_stats(m, device->act_log);
+		lc_seq_dump_details(m, device->act_log, "", NULL);
+		put_ldev(device);
+	}
+	return 0;
+}
+
+static int device_oldest_requests_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_device *device = m->private;
+	struct drbd_resource *resource = device->resource;
+	unsigned long now = jiffies;
+	struct drbd_request *r1, *r2;
+	int i;
+
+	/* BUMP me if you change the file format/content/presentation */
+	seq_printf(m, "v: %u\n\n", 0);
+
+	seq_puts(m, RQ_HDR);
+	spin_lock_irq(&resource->req_lock);
+	/* WRITE, then READ */
+	for (i = 1; i >= 0; --i) {
+		r1 = list_first_entry_or_null(&device->pending_master_completion[i],
+			struct drbd_request, req_pending_master_completion);
+		r2 = list_first_entry_or_null(&device->pending_completion[i],
+			struct drbd_request, req_pending_local);
+		if (r1)
+			seq_print_one_request(m, r1, now);
+		if (r2 && r2 != r1)
+			seq_print_one_request(m, r2, now);
+	}
+	spin_unlock_irq(&resource->req_lock);
+	return 0;
+}
+
+static int device_data_gen_id_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_device *device = m->private;
+	struct drbd_md *md;
+	enum drbd_uuid_index idx;
+
+	if (!get_ldev_if_state(device, D_FAILED))
+		return -ENODEV;
+
+	md = &device->ldev->md;
+	spin_lock_irq(&md->uuid_lock);
+	for (idx = UI_CURRENT; idx <= UI_HISTORY_END; idx++) {
+		seq_printf(m, "0x%016llX\n", md->uuid[idx]);
+	}
+	spin_unlock_irq(&md->uuid_lock);
+	put_ldev(device);
+	return 0;
+}
+
+#define drbd_debugfs_device_attr(name)						\
+static int device_ ## name ## _open(struct inode *inode, struct file *file)	\
+{										\
+	struct drbd_device *device = inode->i_private;				\
+	return drbd_single_open(file, device_ ## name ## _show, device,		\
+				&device->kref, drbd_destroy_device);		\
+}										\
+static int device_ ## name ## _release(struct inode *inode, struct file *file)	\
+{										\
+	struct drbd_device *device = inode->i_private;				\
+	kref_put(&device->kref, drbd_destroy_device);				\
+	return single_release(inode, file);					\
+}										\
+static const struct file_operations device_ ## name ## _fops = {		\
+	.owner		= THIS_MODULE,						\
+	.open		= device_ ## name ## _open,				\
+	.read		= seq_read,						\
+	.llseek		= seq_lseek,						\
+	.release	= device_ ## name ## _release,				\
+};
+
+drbd_debugfs_device_attr(oldest_requests)
+drbd_debugfs_device_attr(act_log_extents)
+drbd_debugfs_device_attr(resync_extents)
+drbd_debugfs_device_attr(data_gen_id)
+
+void drbd_debugfs_device_add(struct drbd_device *device)
+{
+	struct dentry *vols_dir = device->resource->debugfs_res_volumes;
+	char minor_buf[8]; /* MINORMASK, MINORBITS == 20; */
+	char vnr_buf[8];   /* volume number vnr is even 16 bit only; */
+	char *slink_name = NULL;
+
+	struct dentry *dentry;
+	if (!vols_dir || !drbd_debugfs_minors)
+		return;
+
+	snprintf(vnr_buf, sizeof(vnr_buf), "%u", device->vnr);
+	dentry = debugfs_create_dir(vnr_buf, vols_dir);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	device->debugfs_vol = dentry;
+
+	snprintf(minor_buf, sizeof(minor_buf), "%u", device->minor);
+	slink_name = kasprintf(GFP_KERNEL, "../resources/%s/volumes/%u",
+			device->resource->name, device->vnr);
+	if (!slink_name)
+		goto fail;
+	dentry = debugfs_create_symlink(minor_buf, drbd_debugfs_minors, slink_name);
+	kfree(slink_name);
+	slink_name = NULL;
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	device->debugfs_minor = dentry;
+
+#define DCF(name)	do {					\
+	dentry = debugfs_create_file(#name, S_IRUSR|S_IRGRP,	\
+			device->debugfs_vol, device,		\
+			&device_ ## name ## _fops);		\
+	if (IS_ERR_OR_NULL(dentry))				\
+		goto fail;					\
+	device->debugfs_vol_ ## name = dentry;			\
+	} while (0)
+
+	DCF(oldest_requests);
+	DCF(act_log_extents);
+	DCF(resync_extents);
+	DCF(data_gen_id);
+#undef DCF
+	return;
+
+fail:
+	drbd_debugfs_device_cleanup(device);
+	drbd_err(device, "failed to create debugfs entries\n");
+}
+
+void drbd_debugfs_device_cleanup(struct drbd_device *device)
+{
+	drbd_debugfs_remove(&device->debugfs_minor);
+	drbd_debugfs_remove(&device->debugfs_vol_oldest_requests);
+	drbd_debugfs_remove(&device->debugfs_vol_act_log_extents);
+	drbd_debugfs_remove(&device->debugfs_vol_resync_extents);
+	drbd_debugfs_remove(&device->debugfs_vol_data_gen_id);
+	drbd_debugfs_remove(&device->debugfs_vol);
+}
+
+void drbd_debugfs_peer_device_add(struct drbd_peer_device *peer_device)
+{
+	struct dentry *conn_dir = peer_device->connection->debugfs_conn;
+	struct dentry *dentry;
+	char vnr_buf[8];
+
+	if (!conn_dir)
+		return;
+
+	snprintf(vnr_buf, sizeof(vnr_buf), "%u", peer_device->device->vnr);
+	dentry = debugfs_create_dir(vnr_buf, conn_dir);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	peer_device->debugfs_peer_dev = dentry;
+	return;
+
+fail:
+	drbd_debugfs_peer_device_cleanup(peer_device);
+	drbd_err(peer_device, "failed to create debugfs entries\n");
+}
+
+void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device)
+{
+	drbd_debugfs_remove(&peer_device->debugfs_peer_dev);
+}
+
+static int drbd_version_show(struct seq_file *m, void *ignored)
+{
+	seq_printf(m, "# %s\n", drbd_buildtag());
+	seq_printf(m, "VERSION=%s\n", REL_VERSION);
+	seq_printf(m, "API_VERSION=%u\n", API_VERSION);
+	seq_printf(m, "PRO_VERSION_MIN=%u\n", PRO_VERSION_MIN);
+	seq_printf(m, "PRO_VERSION_MAX=%u\n", PRO_VERSION_MAX);
+	return 0;
+}
+
+static int drbd_version_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, drbd_version_show, NULL);
+}
+
+static struct file_operations drbd_version_fops = {
+	.owner = THIS_MODULE,
+	.open = drbd_version_open,
+	.llseek = seq_lseek,
+	.read = seq_read,
+	.release = single_release,
+};
+
+/* not __exit, may be indirectly called
+ * from the module-load-failure path as well. */
+void drbd_debugfs_cleanup(void)
+{
+	drbd_debugfs_remove(&drbd_debugfs_resources);
+	drbd_debugfs_remove(&drbd_debugfs_minors);
+	drbd_debugfs_remove(&drbd_debugfs_version);
+	drbd_debugfs_remove(&drbd_debugfs_root);
+}
+
+int __init drbd_debugfs_init(void)
+{
+	struct dentry *dentry;
+
+	dentry = debugfs_create_dir("drbd", NULL);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	drbd_debugfs_root = dentry;
+
+	dentry = debugfs_create_file("version", 0444, drbd_debugfs_root, NULL, &drbd_version_fops);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	drbd_debugfs_version = dentry;
+
+	dentry = debugfs_create_dir("resources", drbd_debugfs_root);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	drbd_debugfs_resources = dentry;
+
+	dentry = debugfs_create_dir("minors", drbd_debugfs_root);
+	if (IS_ERR_OR_NULL(dentry))
+		goto fail;
+	drbd_debugfs_minors = dentry;
+	return 0;
+
+fail:
+	drbd_debugfs_cleanup();
+	if (dentry)
+		return PTR_ERR(dentry);
+	else
+		return -EINVAL;
+}
diff --git a/drivers/block/drbd/drbd_debugfs.h b/drivers/block/drbd/drbd_debugfs.h
new file mode 100644
index 0000000..8bee213
--- /dev/null
+++ b/drivers/block/drbd/drbd_debugfs.h
@@ -0,0 +1,39 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+
+#include "drbd_int.h"
+
+#ifdef CONFIG_DEBUG_FS
+int __init drbd_debugfs_init(void);
+void drbd_debugfs_cleanup(void);
+
+void drbd_debugfs_resource_add(struct drbd_resource *resource);
+void drbd_debugfs_resource_cleanup(struct drbd_resource *resource);
+
+void drbd_debugfs_connection_add(struct drbd_connection *connection);
+void drbd_debugfs_connection_cleanup(struct drbd_connection *connection);
+
+void drbd_debugfs_device_add(struct drbd_device *device);
+void drbd_debugfs_device_cleanup(struct drbd_device *device);
+
+void drbd_debugfs_peer_device_add(struct drbd_peer_device *peer_device);
+void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device);
+#else
+
+static inline int __init drbd_debugfs_init(void) { return -ENODEV; }
+static inline void drbd_debugfs_cleanup(void) { }
+
+static inline void drbd_debugfs_resource_add(struct drbd_resource *resource) { }
+static inline void drbd_debugfs_resource_cleanup(struct drbd_resource *resource) { }
+
+static inline void drbd_debugfs_connection_add(struct drbd_connection *connection) { }
+static inline void drbd_debugfs_connection_cleanup(struct drbd_connection *connection) { }
+
+static inline void drbd_debugfs_device_add(struct drbd_device *device) { }
+static inline void drbd_debugfs_device_cleanup(struct drbd_device *device) { }
+
+static inline void drbd_debugfs_peer_device_add(struct drbd_peer_device *peer_device) { }
+static inline void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device) { }
+
+#endif
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index a76ceb3..1a00001 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -317,7 +317,63 @@
 
 	struct list_head tl_requests; /* ring list in the transfer log */
 	struct bio *master_bio;       /* master bio pointer */
-	unsigned long start_time;
+
+	/* see struct drbd_device */
+	struct list_head req_pending_master_completion;
+	struct list_head req_pending_local;
+
+	/* for generic IO accounting */
+	unsigned long start_jif;
+
+	/* for DRBD internal statistics */
+
+	/* Minimal set of time stamps to determine if we wait for activity log
+	 * transactions, local disk or peer.  32 bit "jiffies" are good enough,
+	 * we don't expect a DRBD request to be stalled for several month.
+	 */
+
+	/* before actual request processing */
+	unsigned long in_actlog_jif;
+
+	/* local disk */
+	unsigned long pre_submit_jif;
+
+	/* per connection */
+	unsigned long pre_send_jif;
+	unsigned long acked_jif;
+	unsigned long net_done_jif;
+
+	/* Possibly even more detail to track each phase:
+	 *  master_completion_jif
+	 *      how long did it take to complete the master bio
+	 *      (application visible latency)
+	 *  allocated_jif
+	 *      how long the master bio was blocked until we finally allocated
+	 *      a tracking struct
+	 *  in_actlog_jif
+	 *      how long did we wait for activity log transactions
+	 *
+	 *  net_queued_jif
+	 *      when did we finally queue it for sending
+	 *  pre_send_jif
+	 *      when did we start sending it
+	 *  post_send_jif
+	 *      how long did we block in the network stack trying to send it
+	 *  acked_jif
+	 *      when did we receive (or fake, in protocol A) a remote ACK
+	 *  net_done_jif
+	 *      when did we receive final acknowledgement (P_BARRIER_ACK),
+	 *      or decide, e.g. on connection loss, that we do no longer expect
+	 *      anything from this peer for this request.
+	 *
+	 *  pre_submit_jif
+	 *  post_sub_jif
+	 *      when did we start submiting to the lower level device,
+	 *      and how long did we block in that submit function
+	 *  local_completion_jif
+	 *      how long did it take the lower level device to complete this request
+	 */
+
 
 	/* once it hits 0, we may complete the master_bio */
 	atomic_t completion_ref;
@@ -366,6 +422,7 @@
 	struct drbd_interval i;
 	/* see comments on ee flag bits below */
 	unsigned long flags;
+	unsigned long submit_jif;
 	union {
 		u64 block_id;
 		struct digest_info *digest;
@@ -408,6 +465,17 @@
 
 	/* Is set when net_conf had two_primaries set while creating this peer_req */
 	__EE_IN_INTERVAL_TREE,
+
+	/* for debugfs: */
+	/* has this been submitted, or does it still wait for something else? */
+	__EE_SUBMITTED,
+
+	/* this is/was a write request */
+	__EE_WRITE,
+
+	/* this originates from application on peer
+	 * (not some resync or verify or other DRBD internal request) */
+	__EE_APPLICATION,
 };
 #define EE_CALL_AL_COMPLETE_IO (1<<__EE_CALL_AL_COMPLETE_IO)
 #define EE_MAY_SET_IN_SYNC     (1<<__EE_MAY_SET_IN_SYNC)
@@ -419,6 +487,9 @@
 #define EE_RESTART_REQUESTS	(1<<__EE_RESTART_REQUESTS)
 #define EE_SEND_WRITE_ACK	(1<<__EE_SEND_WRITE_ACK)
 #define EE_IN_INTERVAL_TREE	(1<<__EE_IN_INTERVAL_TREE)
+#define EE_SUBMITTED		(1<<__EE_SUBMITTED)
+#define EE_WRITE		(1<<__EE_WRITE)
+#define EE_APPLICATION		(1<<__EE_APPLICATION)
 
 /* flag bits per device */
 enum {
@@ -433,11 +504,11 @@
 	CONSIDER_RESYNC,
 
 	MD_NO_FUA,		/* Users wants us to not use FUA/FLUSH on meta data dev */
+
 	SUSPEND_IO,		/* suspend application io */
 	BITMAP_IO,		/* suspend application io;
 				   once no more io in flight, start bitmap io */
 	BITMAP_IO_QUEUED,       /* Started bitmap IO */
-	GO_DISKLESS,		/* Disk is being detached, on io-error or admin request. */
 	WAS_IO_ERROR,		/* Local disk failed, returned IO error */
 	WAS_READ_ERROR,		/* Local disk READ failed (set additionally to the above) */
 	FORCE_DETACH,		/* Force-detach from local disk, aborting any pending local IO */
@@ -450,6 +521,20 @@
 	B_RS_H_DONE,		/* Before resync handler done (already executed) */
 	DISCARD_MY_DATA,	/* discard_my_data flag per volume */
 	READ_BALANCE_RR,
+
+	FLUSH_PENDING,		/* if set, device->flush_jif is when we submitted that flush
+				 * from drbd_flush_after_epoch() */
+
+	/* cleared only after backing device related structures have been destroyed. */
+	GOING_DISKLESS,		/* Disk is being detached, because of io-error, or admin request. */
+
+	/* to be used in drbd_device_post_work() */
+	GO_DISKLESS,		/* tell worker to schedule cleanup before detach */
+	DESTROY_DISK,		/* tell worker to close backing devices and destroy related structures. */
+	MD_SYNC,		/* tell worker to call drbd_md_sync() */
+	RS_START,		/* tell worker to start resync/OV */
+	RS_PROGRESS,		/* tell worker that resync made significant progress */
+	RS_DONE,		/* tell worker that resync is done */
 };
 
 struct drbd_bitmap; /* opaque for drbd_device */
@@ -531,6 +616,11 @@
 };
 
 struct drbd_md_io {
+	struct page *page;
+	unsigned long start_jif;	/* last call to drbd_md_get_buffer */
+	unsigned long submit_jif;	/* last _drbd_md_sync_page_io() submit */
+	const char *current_use;
+	atomic_t in_use;
 	unsigned int done;
 	int error;
 };
@@ -577,10 +667,18 @@
 				 * and potentially deadlock on, this drbd worker.
 				 */
 	DISCONNECT_SENT,
+
+	DEVICE_WORK_PENDING,	/* tell worker that some device has pending work */
 };
 
 struct drbd_resource {
 	char *name;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs_res;
+	struct dentry *debugfs_res_volumes;
+	struct dentry *debugfs_res_connections;
+	struct dentry *debugfs_res_in_flight_summary;
+#endif
 	struct kref kref;
 	struct idr devices;		/* volume number to device mapping */
 	struct list_head connections;
@@ -594,12 +692,28 @@
 	unsigned susp_nod:1;		/* IO suspended because no data */
 	unsigned susp_fen:1;		/* IO suspended because fence peer handler runs */
 
+	enum write_ordering_e write_ordering;
+
 	cpumask_var_t cpu_mask;
 };
 
+struct drbd_thread_timing_details
+{
+	unsigned long start_jif;
+	void *cb_addr;
+	const char *caller_fn;
+	unsigned int line;
+	unsigned int cb_nr;
+};
+
 struct drbd_connection {
 	struct list_head connections;
 	struct drbd_resource *resource;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs_conn;
+	struct dentry *debugfs_conn_callback_history;
+	struct dentry *debugfs_conn_oldest_requests;
+#endif
 	struct kref kref;
 	struct idr peer_devices;	/* volume number to peer device mapping */
 	enum drbd_conns cstate;		/* Only C_STANDALONE to C_WF_REPORT_PARAMS */
@@ -636,7 +750,6 @@
 	struct drbd_epoch *current_epoch;
 	spinlock_t epoch_lock;
 	unsigned int epochs;
-	enum write_ordering_e write_ordering;
 	atomic_t current_tle_nr;	/* transfer log epoch number */
 	unsigned current_tle_writes;	/* writes seen within this tl epoch */
 
@@ -645,9 +758,22 @@
 	struct drbd_thread worker;
 	struct drbd_thread asender;
 
+	/* cached pointers,
+	 * so we can look up the oldest pending requests more quickly.
+	 * protected by resource->req_lock */
+	struct drbd_request *req_next; /* DRBD 9: todo.req_next */
+	struct drbd_request *req_ack_pending;
+	struct drbd_request *req_not_net_done;
+
 	/* sender side */
 	struct drbd_work_queue sender_work;
 
+#define DRBD_THREAD_DETAILS_HIST	16
+	unsigned int w_cb_nr; /* keeps counting up */
+	unsigned int r_cb_nr; /* keeps counting up */
+	struct drbd_thread_timing_details w_timing_details[DRBD_THREAD_DETAILS_HIST];
+	struct drbd_thread_timing_details r_timing_details[DRBD_THREAD_DETAILS_HIST];
+
 	struct {
 		/* whether this sender thread
 		 * has processed a single write yet. */
@@ -663,11 +789,22 @@
 	} send;
 };
 
+void __update_timing_details(
+		struct drbd_thread_timing_details *tdp,
+		unsigned int *cb_nr,
+		void *cb,
+		const char *fn, const unsigned int line);
+
+#define update_worker_timing_details(c, cb) \
+	__update_timing_details(c->w_timing_details, &c->w_cb_nr, cb, __func__ , __LINE__ )
+#define update_receiver_timing_details(c, cb) \
+	__update_timing_details(c->r_timing_details, &c->r_cb_nr, cb, __func__ , __LINE__ )
+
 struct submit_worker {
 	struct workqueue_struct *wq;
 	struct work_struct worker;
 
-	spinlock_t lock;
+	/* protected by ..->resource->req_lock */
 	struct list_head writes;
 };
 
@@ -675,12 +812,29 @@
 	struct list_head peer_devices;
 	struct drbd_device *device;
 	struct drbd_connection *connection;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs_peer_dev;
+#endif
 };
 
 struct drbd_device {
 	struct drbd_resource *resource;
 	struct list_head peer_devices;
-	int vnr;			/* volume number within the connection */
+	struct list_head pending_bitmap_io;
+
+	unsigned long flush_jif;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs_minor;
+	struct dentry *debugfs_vol;
+	struct dentry *debugfs_vol_oldest_requests;
+	struct dentry *debugfs_vol_act_log_extents;
+	struct dentry *debugfs_vol_resync_extents;
+	struct dentry *debugfs_vol_data_gen_id;
+#endif
+
+	unsigned int vnr;	/* volume number within the connection */
+	unsigned int minor;	/* device minor number */
+
 	struct kref kref;
 
 	/* things that are stored as / read from meta data on disk */
@@ -697,19 +851,10 @@
 	unsigned long last_reattach_jif;
 	struct drbd_work resync_work;
 	struct drbd_work unplug_work;
-	struct drbd_work go_diskless;
-	struct drbd_work md_sync_work;
-	struct drbd_work start_resync_work;
 	struct timer_list resync_timer;
 	struct timer_list md_sync_timer;
 	struct timer_list start_resync_timer;
 	struct timer_list request_timer;
-#ifdef DRBD_DEBUG_MD_SYNC
-	struct {
-		unsigned int line;
-		const char* func;
-	} last_md_mark_dirty;
-#endif
 
 	/* Used after attach while negotiating new disk state. */
 	union drbd_state new_state_tmp;
@@ -724,6 +869,7 @@
 	unsigned int al_writ_cnt;
 	unsigned int bm_writ_cnt;
 	atomic_t ap_bio_cnt;	 /* Requests we need to complete */
+	atomic_t ap_actlog_cnt;  /* Requests waiting for activity log */
 	atomic_t ap_pending_cnt; /* AP data packets on the wire, ack expected */
 	atomic_t rs_pending_cnt; /* RS request/data packets on the wire */
 	atomic_t unacked_cnt;	 /* Need to send replies for */
@@ -733,6 +879,13 @@
 	struct rb_root read_requests;
 	struct rb_root write_requests;
 
+	/* for statistics and timeouts */
+	/* [0] read, [1] write */
+	struct list_head pending_master_completion[2];
+	struct list_head pending_completion[2];
+
+	/* use checksums for *this* resync */
+	bool use_csums;
 	/* blocks to resync in this run [unit BM_BLOCK_SIZE] */
 	unsigned long rs_total;
 	/* number of resync blocks that failed in this run */
@@ -788,9 +941,7 @@
 	atomic_t pp_in_use;		/* allocated from page pool */
 	atomic_t pp_in_use_by_net;	/* sendpage()d, still referenced by tcp */
 	wait_queue_head_t ee_wait;
-	struct page *md_io_page;	/* one page buffer for md_io */
 	struct drbd_md_io md_io;
-	atomic_t md_io_in_use;		/* protects the md_io, md_io_page and md_io_tmpp */
 	spinlock_t al_lock;
 	wait_queue_head_t al_wait;
 	struct lru_cache *act_log;	/* activity log */
@@ -800,7 +951,6 @@
 	atomic_t packet_seq;
 	unsigned int peer_seq;
 	spinlock_t peer_seq_lock;
-	unsigned int minor;
 	unsigned long comm_bm_set; /* communicated number of set bits. */
 	struct bm_io_work bm_io_work;
 	u64 ed_uuid; /* UUID of the exposed data */
@@ -824,6 +974,21 @@
 	struct submit_worker submit;
 };
 
+struct drbd_bm_aio_ctx {
+	struct drbd_device *device;
+	struct list_head list; /* on device->pending_bitmap_io */;
+	unsigned long start_jif;
+	atomic_t in_flight;
+	unsigned int done;
+	unsigned flags;
+#define BM_AIO_COPY_PAGES	1
+#define BM_AIO_WRITE_HINTED	2
+#define BM_AIO_WRITE_ALL_PAGES	4
+#define BM_AIO_READ		8
+	int error;
+	struct kref kref;
+};
+
 struct drbd_config_context {
 	/* assigned from drbd_genlmsghdr */
 	unsigned int minor;
@@ -949,7 +1114,7 @@
 extern int drbd_send_bitmap(struct drbd_device *device);
 extern void drbd_send_sr_reply(struct drbd_peer_device *, enum drbd_state_rv retcode);
 extern void conn_send_sr_reply(struct drbd_connection *connection, enum drbd_state_rv retcode);
-extern void drbd_free_bc(struct drbd_backing_dev *ldev);
+extern void drbd_free_ldev(struct drbd_backing_dev *ldev);
 extern void drbd_device_cleanup(struct drbd_device *device);
 void drbd_print_uuids(struct drbd_device *device, const char *text);
 
@@ -966,13 +1131,7 @@
 extern void drbd_md_set_flag(struct drbd_device *device, int flags) __must_hold(local);
 extern void drbd_md_clear_flag(struct drbd_device *device, int flags)__must_hold(local);
 extern int drbd_md_test_flag(struct drbd_backing_dev *, int);
-#ifndef DRBD_DEBUG_MD_SYNC
 extern void drbd_md_mark_dirty(struct drbd_device *device);
-#else
-#define drbd_md_mark_dirty(m)	drbd_md_mark_dirty_(m, __LINE__ , __func__ )
-extern void drbd_md_mark_dirty_(struct drbd_device *device,
-		unsigned int line, const char *func);
-#endif
 extern void drbd_queue_bitmap_io(struct drbd_device *device,
 				 int (*io_fn)(struct drbd_device *),
 				 void (*done)(struct drbd_device *, int),
@@ -983,9 +1142,8 @@
 extern int drbd_bitmap_io_from_worker(struct drbd_device *device,
 		int (*io_fn)(struct drbd_device *),
 		char *why, enum bm_flag flags);
-extern int drbd_bmio_set_n_write(struct drbd_device *device);
-extern int drbd_bmio_clear_n_write(struct drbd_device *device);
-extern void drbd_ldev_destroy(struct drbd_device *device);
+extern int drbd_bmio_set_n_write(struct drbd_device *device) __must_hold(local);
+extern int drbd_bmio_clear_n_write(struct drbd_device *device) __must_hold(local);
 
 /* Meta data layout
  *
@@ -1105,17 +1263,21 @@
 /* in which _bitmap_ extent (resp. sector) the bit for a certain
  * _storage_ sector is located in */
 #define BM_SECT_TO_EXT(x)   ((x)>>(BM_EXT_SHIFT-9))
+#define BM_BIT_TO_EXT(x)    ((x) >> (BM_EXT_SHIFT - BM_BLOCK_SHIFT))
 
-/* how much _storage_ sectors we have per bitmap sector */
+/* first storage sector a bitmap extent corresponds to */
 #define BM_EXT_TO_SECT(x)   ((sector_t)(x) << (BM_EXT_SHIFT-9))
+/* how much _storage_ sectors we have per bitmap extent */
 #define BM_SECT_PER_EXT     BM_EXT_TO_SECT(1)
+/* how many bits are covered by one bitmap extent (resync extent) */
+#define BM_BITS_PER_EXT     (1UL << (BM_EXT_SHIFT - BM_BLOCK_SHIFT))
+
+#define BM_BLOCKS_PER_BM_EXT_MASK  (BM_BITS_PER_EXT - 1)
+
 
 /* in one sector of the bitmap, we have this many activity_log extents. */
 #define AL_EXT_PER_BM_SECT  (1 << (BM_EXT_SHIFT - AL_EXTENT_SHIFT))
 
-#define BM_BLOCKS_PER_BM_EXT_B (BM_EXT_SHIFT - BM_BLOCK_SHIFT)
-#define BM_BLOCKS_PER_BM_EXT_MASK  ((1<<BM_BLOCKS_PER_BM_EXT_B) - 1)
-
 /* the extent in "PER_EXTENT" below is an activity log extent
  * we need that many (long words/bytes) to store the bitmap
  *		     of one AL_EXTENT_SIZE chunk of storage.
@@ -1195,11 +1357,11 @@
 		const unsigned long s, const unsigned long e);
 extern int  drbd_bm_test_bit(struct drbd_device *device, unsigned long bitnr);
 extern int  drbd_bm_e_weight(struct drbd_device *device, unsigned long enr);
-extern int  drbd_bm_write_page(struct drbd_device *device, unsigned int idx) __must_hold(local);
 extern int  drbd_bm_read(struct drbd_device *device) __must_hold(local);
 extern void drbd_bm_mark_for_writeout(struct drbd_device *device, int page_nr);
 extern int  drbd_bm_write(struct drbd_device *device) __must_hold(local);
 extern int  drbd_bm_write_hinted(struct drbd_device *device) __must_hold(local);
+extern int  drbd_bm_write_lazy(struct drbd_device *device, unsigned upper_idx) __must_hold(local);
 extern int drbd_bm_write_all(struct drbd_device *device) __must_hold(local);
 extern int  drbd_bm_write_copy_pages(struct drbd_device *device) __must_hold(local);
 extern size_t	     drbd_bm_words(struct drbd_device *device);
@@ -1213,7 +1375,6 @@
 extern unsigned long _drbd_bm_find_next_zero(struct drbd_device *device, unsigned long bm_fo);
 extern unsigned long _drbd_bm_total_weight(struct drbd_device *device);
 extern unsigned long drbd_bm_total_weight(struct drbd_device *device);
-extern int drbd_bm_rs_done(struct drbd_device *device);
 /* for receive_bitmap */
 extern void drbd_bm_merge_lel(struct drbd_device *device, size_t offset,
 		size_t number, unsigned long *buffer);
@@ -1312,7 +1473,7 @@
 extern enum determine_dev_size
 drbd_determine_dev_size(struct drbd_device *, enum dds_flags, struct resize_parms *) __must_hold(local);
 extern void resync_after_online_grow(struct drbd_device *);
-extern void drbd_reconsider_max_bio_size(struct drbd_device *device);
+extern void drbd_reconsider_max_bio_size(struct drbd_device *device, struct drbd_backing_dev *bdev);
 extern enum drbd_state_rv drbd_set_role(struct drbd_device *device,
 					enum drbd_role new_role,
 					int force);
@@ -1333,7 +1494,7 @@
 extern void suspend_other_sg(struct drbd_device *device);
 extern int drbd_resync_finished(struct drbd_device *device);
 /* maybe rather drbd_main.c ? */
-extern void *drbd_md_get_buffer(struct drbd_device *device);
+extern void *drbd_md_get_buffer(struct drbd_device *device, const char *intent);
 extern void drbd_md_put_buffer(struct drbd_device *device);
 extern int drbd_md_sync_page_io(struct drbd_device *device,
 		struct drbd_backing_dev *bdev, sector_t sector, int rw);
@@ -1380,7 +1541,8 @@
 extern int drbd_receiver(struct drbd_thread *thi);
 extern int drbd_asender(struct drbd_thread *thi);
 extern bool drbd_rs_c_min_rate_throttle(struct drbd_device *device);
-extern bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t sector);
+extern bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t sector,
+		bool throttle_if_app_is_waiting);
 extern int drbd_submit_peer_request(struct drbd_device *,
 				    struct drbd_peer_request *, const unsigned,
 				    const int);
@@ -1464,10 +1626,7 @@
 {
 	__release(local);
 	if (!bio->bi_bdev) {
-		printk(KERN_ERR "drbd%d: drbd_generic_make_request: "
-				"bio->bi_bdev == NULL\n",
-		       device_to_minor(device));
-		dump_stack();
+		drbd_err(device, "drbd_generic_make_request: bio->bi_bdev == NULL\n");
 		bio_endio(bio, -ENODEV);
 		return;
 	}
@@ -1478,7 +1637,8 @@
 		generic_make_request(bio);
 }
 
-void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ordering_e wo);
+void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backing_dev *bdev,
+			      enum write_ordering_e wo);
 
 /* drbd_proc.c */
 extern struct proc_dir_entry *drbd_proc;
@@ -1489,9 +1649,9 @@
 /* drbd_actlog.c */
 extern bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval *i);
 extern int drbd_al_begin_io_nonblock(struct drbd_device *device, struct drbd_interval *i);
-extern void drbd_al_begin_io_commit(struct drbd_device *device, bool delegate);
+extern void drbd_al_begin_io_commit(struct drbd_device *device);
 extern bool drbd_al_begin_io_fastpath(struct drbd_device *device, struct drbd_interval *i);
-extern void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i, bool delegate);
+extern void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i);
 extern void drbd_al_complete_io(struct drbd_device *device, struct drbd_interval *i);
 extern void drbd_rs_complete_io(struct drbd_device *device, sector_t sector);
 extern int drbd_rs_begin_io(struct drbd_device *device, sector_t sector);
@@ -1501,14 +1661,17 @@
 extern void drbd_rs_failed_io(struct drbd_device *device,
 		sector_t sector, int size);
 extern void drbd_advance_rs_marks(struct drbd_device *device, unsigned long still_to_go);
-extern void __drbd_set_in_sync(struct drbd_device *device, sector_t sector,
-		int size, const char *file, const unsigned int line);
+
+enum update_sync_bits_mode { RECORD_RS_FAILED, SET_OUT_OF_SYNC, SET_IN_SYNC };
+extern int __drbd_change_sync(struct drbd_device *device, sector_t sector, int size,
+		enum update_sync_bits_mode mode,
+		const char *file, const unsigned int line);
 #define drbd_set_in_sync(device, sector, size) \
-	__drbd_set_in_sync(device, sector, size, __FILE__, __LINE__)
-extern int __drbd_set_out_of_sync(struct drbd_device *device, sector_t sector,
-		int size, const char *file, const unsigned int line);
+	__drbd_change_sync(device, sector, size, SET_IN_SYNC, __FILE__, __LINE__)
 #define drbd_set_out_of_sync(device, sector, size) \
-	__drbd_set_out_of_sync(device, sector, size, __FILE__, __LINE__)
+	__drbd_change_sync(device, sector, size, SET_OUT_OF_SYNC, __FILE__, __LINE__)
+#define drbd_rs_failed_io(device, sector, size) \
+	__drbd_change_sync(device, sector, size, RECORD_RS_FAILED, __FILE__, __LINE__)
 extern void drbd_al_shrink(struct drbd_device *device);
 extern int drbd_initialize_al(struct drbd_device *, void *);
 
@@ -1764,16 +1927,6 @@
 }
 
 static inline void
-drbd_queue_work_front(struct drbd_work_queue *q, struct drbd_work *w)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&q->q_lock, flags);
-	list_add(&w->list, &q->q);
-	spin_unlock_irqrestore(&q->q_lock, flags);
-	wake_up(&q->q_wait);
-}
-
-static inline void
 drbd_queue_work(struct drbd_work_queue *q, struct drbd_work *w)
 {
 	unsigned long flags;
@@ -1783,6 +1936,29 @@
 	wake_up(&q->q_wait);
 }
 
+static inline void
+drbd_queue_work_if_unqueued(struct drbd_work_queue *q, struct drbd_work *w)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&q->q_lock, flags);
+	if (list_empty_careful(&w->list))
+		list_add_tail(&w->list, &q->q);
+	spin_unlock_irqrestore(&q->q_lock, flags);
+	wake_up(&q->q_wait);
+}
+
+static inline void
+drbd_device_post_work(struct drbd_device *device, int work_bit)
+{
+	if (!test_and_set_bit(work_bit, &device->flags)) {
+		struct drbd_connection *connection =
+			first_peer_device(device)->connection;
+		struct drbd_work_queue *q = &connection->sender_work;
+		if (!test_and_set_bit(DEVICE_WORK_PENDING, &connection->flags))
+			wake_up(&q->q_wait);
+	}
+}
+
 extern void drbd_flush_workqueue(struct drbd_work_queue *work_queue);
 
 static inline void wake_asender(struct drbd_connection *connection)
@@ -1859,7 +2035,7 @@
 			func, line,					\
 			atomic_read(&device->which))
 
-#define dec_ap_pending(device) _dec_ap_pending(device, __FUNCTION__, __LINE__)
+#define dec_ap_pending(device) _dec_ap_pending(device, __func__, __LINE__)
 static inline void _dec_ap_pending(struct drbd_device *device, const char *func, int line)
 {
 	if (atomic_dec_and_test(&device->ap_pending_cnt))
@@ -1878,7 +2054,7 @@
 	atomic_inc(&device->rs_pending_cnt);
 }
 
-#define dec_rs_pending(device) _dec_rs_pending(device, __FUNCTION__, __LINE__)
+#define dec_rs_pending(device) _dec_rs_pending(device, __func__, __LINE__)
 static inline void _dec_rs_pending(struct drbd_device *device, const char *func, int line)
 {
 	atomic_dec(&device->rs_pending_cnt);
@@ -1899,20 +2075,29 @@
 	atomic_inc(&device->unacked_cnt);
 }
 
-#define dec_unacked(device) _dec_unacked(device, __FUNCTION__, __LINE__)
+#define dec_unacked(device) _dec_unacked(device, __func__, __LINE__)
 static inline void _dec_unacked(struct drbd_device *device, const char *func, int line)
 {
 	atomic_dec(&device->unacked_cnt);
 	ERR_IF_CNT_IS_NEGATIVE(unacked_cnt, func, line);
 }
 
-#define sub_unacked(device, n) _sub_unacked(device, n, __FUNCTION__, __LINE__)
+#define sub_unacked(device, n) _sub_unacked(device, n, __func__, __LINE__)
 static inline void _sub_unacked(struct drbd_device *device, int n, const char *func, int line)
 {
 	atomic_sub(n, &device->unacked_cnt);
 	ERR_IF_CNT_IS_NEGATIVE(unacked_cnt, func, line);
 }
 
+static inline bool is_sync_state(enum drbd_conns connection_state)
+{
+	return
+	   (connection_state == C_SYNC_SOURCE
+	||  connection_state == C_SYNC_TARGET
+	||  connection_state == C_PAUSED_SYNC_S
+	||  connection_state == C_PAUSED_SYNC_T);
+}
+
 /**
  * get_ldev() - Increase the ref count on device->ldev. Returns 0 if there is no ldev
  * @M:		DRBD device.
@@ -1924,6 +2109,11 @@
 
 static inline void put_ldev(struct drbd_device *device)
 {
+	enum drbd_disk_state ds = device->state.disk;
+	/* We must check the state *before* the atomic_dec becomes visible,
+	 * or we have a theoretical race where someone hitting zero,
+	 * while state still D_FAILED, will then see D_DISKLESS in the
+	 * condition below and calling into destroy, where he must not, yet. */
 	int i = atomic_dec_return(&device->local_cnt);
 
 	/* This may be called from some endio handler,
@@ -1932,15 +2122,13 @@
 	__release(local);
 	D_ASSERT(device, i >= 0);
 	if (i == 0) {
-		if (device->state.disk == D_DISKLESS)
+		if (ds == D_DISKLESS)
 			/* even internal references gone, safe to destroy */
-			drbd_ldev_destroy(device);
-		if (device->state.disk == D_FAILED) {
+			drbd_device_post_work(device, DESTROY_DISK);
+		if (ds == D_FAILED)
 			/* all application IO references gone. */
-			if (!test_and_set_bit(GO_DISKLESS, &device->flags))
-				drbd_queue_work(&first_peer_device(device)->connection->sender_work,
-						&device->go_diskless);
-		}
+			if (!test_and_set_bit(GOING_DISKLESS, &device->flags))
+				drbd_device_post_work(device, GO_DISKLESS);
 		wake_up(&device->misc_wait);
 	}
 }
@@ -1964,54 +2152,6 @@
 extern int _get_ldev_if_state(struct drbd_device *device, enum drbd_disk_state mins);
 #endif
 
-/* you must have an "get_ldev" reference */
-static inline void drbd_get_syncer_progress(struct drbd_device *device,
-		unsigned long *bits_left, unsigned int *per_mil_done)
-{
-	/* this is to break it at compile time when we change that, in case we
-	 * want to support more than (1<<32) bits on a 32bit arch. */
-	typecheck(unsigned long, device->rs_total);
-
-	/* note: both rs_total and rs_left are in bits, i.e. in
-	 * units of BM_BLOCK_SIZE.
-	 * for the percentage, we don't care. */
-
-	if (device->state.conn == C_VERIFY_S || device->state.conn == C_VERIFY_T)
-		*bits_left = device->ov_left;
-	else
-		*bits_left = drbd_bm_total_weight(device) - device->rs_failed;
-	/* >> 10 to prevent overflow,
-	 * +1 to prevent division by zero */
-	if (*bits_left > device->rs_total) {
-		/* doh. maybe a logic bug somewhere.
-		 * may also be just a race condition
-		 * between this and a disconnect during sync.
-		 * for now, just prevent in-kernel buffer overflow.
-		 */
-		smp_rmb();
-		drbd_warn(device, "cs:%s rs_left=%lu > rs_total=%lu (rs_failed %lu)\n",
-				drbd_conn_str(device->state.conn),
-				*bits_left, device->rs_total, device->rs_failed);
-		*per_mil_done = 0;
-	} else {
-		/* Make sure the division happens in long context.
-		 * We allow up to one petabyte storage right now,
-		 * at a granularity of 4k per bit that is 2**38 bits.
-		 * After shift right and multiplication by 1000,
-		 * this should still fit easily into a 32bit long,
-		 * so we don't need a 64bit division on 32bit arch.
-		 * Note: currently we don't support such large bitmaps on 32bit
-		 * arch anyways, but no harm done to be prepared for it here.
-		 */
-		unsigned int shift = device->rs_total > UINT_MAX ? 16 : 10;
-		unsigned long left = *bits_left >> shift;
-		unsigned long total = 1UL + (device->rs_total >> shift);
-		unsigned long tmp = 1000UL - left * 1000UL/total;
-		*per_mil_done = tmp;
-	}
-}
-
-
 /* this throttles on-the-fly application requests
  * according to max_buffers settings;
  * maybe re-implement using semaphores? */
@@ -2201,25 +2341,6 @@
 	return QUEUE_ORDERED_NONE;
 }
 
-static inline void drbd_md_flush(struct drbd_device *device)
-{
-	int r;
-
-	if (device->ldev == NULL) {
-		drbd_warn(device, "device->ldev == NULL in drbd_md_flush\n");
-		return;
-	}
-
-	if (test_bit(MD_NO_FUA, &device->flags))
-		return;
-
-	r = blkdev_issue_flush(device->ldev->md_bdev, GFP_NOIO, NULL);
-	if (r) {
-		set_bit(MD_NO_FUA, &device->flags);
-		drbd_err(device, "meta data flush failed with status %d, disabling md-flushes\n", r);
-	}
-}
-
 static inline struct drbd_connection *first_connection(struct drbd_resource *resource)
 {
 	return list_first_entry_or_null(&resource->connections,
diff --git a/drivers/block/drbd/drbd_interval.h b/drivers/block/drbd/drbd_interval.h
index f38fcb0..f210543 100644
--- a/drivers/block/drbd/drbd_interval.h
+++ b/drivers/block/drbd/drbd_interval.h
@@ -10,7 +10,9 @@
 	unsigned int size;	/* size in bytes */
 	sector_t end;		/* highest interval end in subtree */
 	int local:1		/* local or remote request? */;
-	int waiting:1;
+	int waiting:1;		/* someone is waiting for this to complete */
+	int completed:1;	/* this has been completed already;
+				 * ignore for conflict detection */
 };
 
 static inline void drbd_clear_interval(struct drbd_interval *i)
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 960645c..9b465bb 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -26,7 +26,10 @@
 
  */
 
+#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
+#include <linux/jiffies.h>
 #include <linux/drbd.h>
 #include <asm/uaccess.h>
 #include <asm/types.h>
@@ -54,16 +57,14 @@
 #include "drbd_int.h"
 #include "drbd_protocol.h"
 #include "drbd_req.h" /* only for _req_mod in tl_release and tl_clear */
-
 #include "drbd_vli.h"
+#include "drbd_debugfs.h"
 
 static DEFINE_MUTEX(drbd_main_mutex);
 static int drbd_open(struct block_device *bdev, fmode_t mode);
 static void drbd_release(struct gendisk *gd, fmode_t mode);
-static int w_md_sync(struct drbd_work *w, int unused);
 static void md_sync_timer_fn(unsigned long data);
 static int w_bitmap_io(struct drbd_work *w, int unused);
-static int w_go_diskless(struct drbd_work *w, int unused);
 
 MODULE_AUTHOR("Philipp Reisner <phil@linbit.com>, "
 	      "Lars Ellenberg <lars@linbit.com>");
@@ -264,7 +265,7 @@
 
 /**
  * _tl_restart() - Walks the transfer log, and applies an action to all requests
- * @device:	DRBD device.
+ * @connection:	DRBD connection to operate on.
  * @what:       The action/event to perform with all request objects
  *
  * @what might be one of CONNECTION_LOST_WHILE_PENDING, RESEND, FAIL_FROZEN_DISK_IO,
@@ -662,6 +663,11 @@
 			    msg_flags);
 	if (data && !err)
 		err = drbd_send_all(connection, sock->socket, data, size, 0);
+	/* DRBD protocol "pings" are latency critical.
+	 * This is supposed to trigger tcp_push_pending_frames() */
+	if (!err && (cmd == P_PING || cmd == P_PING_ACK))
+		drbd_tcp_nodelay(sock->socket);
+
 	return err;
 }
 
@@ -1636,7 +1642,10 @@
 	if (peer_device->connection->agreed_pro_version >= 100) {
 		if (req->rq_state & RQ_EXP_RECEIVE_ACK)
 			dp_flags |= DP_SEND_RECEIVE_ACK;
-		if (req->rq_state & RQ_EXP_WRITE_ACK)
+		/* During resync, request an explicit write ack,
+		 * even in protocol != C */
+		if (req->rq_state & RQ_EXP_WRITE_ACK
+		|| (dp_flags & DP_MAY_SET_IN_SYNC))
 			dp_flags |= DP_SEND_WRITE_ACK;
 	}
 	p->dp_flags = cpu_to_be32(dp_flags);
@@ -1900,6 +1909,7 @@
 	drbd_set_defaults(device);
 
 	atomic_set(&device->ap_bio_cnt, 0);
+	atomic_set(&device->ap_actlog_cnt, 0);
 	atomic_set(&device->ap_pending_cnt, 0);
 	atomic_set(&device->rs_pending_cnt, 0);
 	atomic_set(&device->unacked_cnt, 0);
@@ -1908,7 +1918,7 @@
 	atomic_set(&device->rs_sect_in, 0);
 	atomic_set(&device->rs_sect_ev, 0);
 	atomic_set(&device->ap_in_flight, 0);
-	atomic_set(&device->md_io_in_use, 0);
+	atomic_set(&device->md_io.in_use, 0);
 
 	mutex_init(&device->own_state_mutex);
 	device->state_mutex = &device->own_state_mutex;
@@ -1924,17 +1934,15 @@
 	INIT_LIST_HEAD(&device->resync_reads);
 	INIT_LIST_HEAD(&device->resync_work.list);
 	INIT_LIST_HEAD(&device->unplug_work.list);
-	INIT_LIST_HEAD(&device->go_diskless.list);
-	INIT_LIST_HEAD(&device->md_sync_work.list);
-	INIT_LIST_HEAD(&device->start_resync_work.list);
 	INIT_LIST_HEAD(&device->bm_io_work.w.list);
+	INIT_LIST_HEAD(&device->pending_master_completion[0]);
+	INIT_LIST_HEAD(&device->pending_master_completion[1]);
+	INIT_LIST_HEAD(&device->pending_completion[0]);
+	INIT_LIST_HEAD(&device->pending_completion[1]);
 
 	device->resync_work.cb  = w_resync_timer;
 	device->unplug_work.cb  = w_send_write_hint;
-	device->go_diskless.cb  = w_go_diskless;
-	device->md_sync_work.cb = w_md_sync;
 	device->bm_io_work.w.cb = w_bitmap_io;
-	device->start_resync_work.cb = w_start_resync;
 
 	init_timer(&device->resync_timer);
 	init_timer(&device->md_sync_timer);
@@ -1992,7 +2000,7 @@
 		drbd_bm_cleanup(device);
 	}
 
-	drbd_free_bc(device->ldev);
+	drbd_free_ldev(device->ldev);
 	device->ldev = NULL;
 
 	clear_bit(AL_SUSPENDED, &device->flags);
@@ -2006,7 +2014,6 @@
 	D_ASSERT(device, list_empty(&first_peer_device(device)->connection->sender_work.q));
 	D_ASSERT(device, list_empty(&device->resync_work.list));
 	D_ASSERT(device, list_empty(&device->unplug_work.list));
-	D_ASSERT(device, list_empty(&device->go_diskless.list));
 
 	drbd_set_defaults(device);
 }
@@ -2129,20 +2136,6 @@
 	return -ENOMEM;
 }
 
-static int drbd_notify_sys(struct notifier_block *this, unsigned long code,
-	void *unused)
-{
-	/* just so we have it.  you never know what interesting things we
-	 * might want to do here some day...
-	 */
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block drbd_notifier = {
-	.notifier_call = drbd_notify_sys,
-};
-
 static void drbd_release_all_peer_reqs(struct drbd_device *device)
 {
 	int rr;
@@ -2173,7 +2166,7 @@
 {
 	struct drbd_device *device = container_of(kref, struct drbd_device, kref);
 	struct drbd_resource *resource = device->resource;
-	struct drbd_connection *connection;
+	struct drbd_peer_device *peer_device, *tmp_peer_device;
 
 	del_timer_sync(&device->request_timer);
 
@@ -2187,7 +2180,7 @@
 	if (device->this_bdev)
 		bdput(device->this_bdev);
 
-	drbd_free_bc(device->ldev);
+	drbd_free_ldev(device->ldev);
 	device->ldev = NULL;
 
 	drbd_release_all_peer_reqs(device);
@@ -2200,15 +2193,20 @@
 
 	if (device->bitmap) /* should no longer be there. */
 		drbd_bm_cleanup(device);
-	__free_page(device->md_io_page);
+	__free_page(device->md_io.page);
 	put_disk(device->vdisk);
 	blk_cleanup_queue(device->rq_queue);
 	kfree(device->rs_plan_s);
-	kfree(first_peer_device(device));
-	kfree(device);
 
-	for_each_connection(connection, resource)
-		kref_put(&connection->kref, drbd_destroy_connection);
+	/* not for_each_connection(connection, resource):
+	 * those may have been cleaned up and disassociated already.
+	 */
+	for_each_peer_device_safe(peer_device, tmp_peer_device, device) {
+		kref_put(&peer_device->connection->kref, drbd_destroy_connection);
+		kfree(peer_device);
+	}
+	memset(device, 0xfd, sizeof(*device));
+	kfree(device);
 	kref_put(&resource->kref, drbd_destroy_resource);
 }
 
@@ -2236,7 +2234,7 @@
 	list_for_each_entry_safe(req, tmp, &writes, tl_requests) {
 		struct drbd_device *device = req->device;
 		struct bio *bio = req->master_bio;
-		unsigned long start_time = req->start_time;
+		unsigned long start_jif = req->start_jif;
 		bool expected;
 
 		expected =
@@ -2271,10 +2269,12 @@
 		/* We are not just doing generic_make_request(),
 		 * as we want to keep the start_time information. */
 		inc_ap_bio(device);
-		__drbd_make_request(device, bio, start_time);
+		__drbd_make_request(device, bio, start_jif);
 	}
 }
 
+/* called via drbd_req_put_completion_ref(),
+ * holds resource->req_lock */
 void drbd_restart_request(struct drbd_request *req)
 {
 	unsigned long flags;
@@ -2298,6 +2298,7 @@
 	idr_destroy(&resource->devices);
 	free_cpumask_var(resource->cpu_mask);
 	kfree(resource->name);
+	memset(resource, 0xf2, sizeof(*resource));
 	kfree(resource);
 }
 
@@ -2307,8 +2308,10 @@
 
 	for_each_connection_safe(connection, tmp, resource) {
 		list_del(&connection->connections);
+		drbd_debugfs_connection_cleanup(connection);
 		kref_put(&connection->kref, drbd_destroy_connection);
 	}
+	drbd_debugfs_resource_cleanup(resource);
 	kref_put(&resource->kref, drbd_destroy_resource);
 }
 
@@ -2318,8 +2321,6 @@
 	struct drbd_device *device;
 	struct drbd_resource *resource, *tmp;
 
-	unregister_reboot_notifier(&drbd_notifier);
-
 	/* first remove proc,
 	 * drbdsetup uses it's presence to detect
 	 * whether DRBD is loaded.
@@ -2335,6 +2336,7 @@
 		destroy_workqueue(retry.wq);
 
 	drbd_genl_unregister();
+	drbd_debugfs_cleanup();
 
 	idr_for_each_entry(&drbd_devices, device, i)
 		drbd_delete_device(device);
@@ -2350,7 +2352,7 @@
 
 	idr_destroy(&drbd_devices);
 
-	printk(KERN_INFO "drbd: module cleanup done.\n");
+	pr_info("module cleanup done.\n");
 }
 
 /**
@@ -2539,6 +2541,20 @@
 	if (nr_cpu_ids > 1 && res_opts->cpu_mask[0] != 0) {
 		err = bitmap_parse(res_opts->cpu_mask, DRBD_CPU_MASK_SIZE,
 				   cpumask_bits(new_cpu_mask), nr_cpu_ids);
+		if (err == -EOVERFLOW) {
+			/* So what. mask it out. */
+			cpumask_var_t tmp_cpu_mask;
+			if (zalloc_cpumask_var(&tmp_cpu_mask, GFP_KERNEL)) {
+				cpumask_setall(tmp_cpu_mask);
+				cpumask_and(new_cpu_mask, new_cpu_mask, tmp_cpu_mask);
+				drbd_warn(resource, "Overflow in bitmap_parse(%.12s%s), truncating to %u bits\n",
+					res_opts->cpu_mask,
+					strlen(res_opts->cpu_mask) > 12 ? "..." : "",
+					nr_cpu_ids);
+				free_cpumask_var(tmp_cpu_mask);
+				err = 0;
+			}
+		}
 		if (err) {
 			drbd_warn(resource, "bitmap_parse() failed with %d\n", err);
 			/* retcode = ERR_CPU_MASK_PARSE; */
@@ -2579,10 +2595,12 @@
 	kref_init(&resource->kref);
 	idr_init(&resource->devices);
 	INIT_LIST_HEAD(&resource->connections);
+	resource->write_ordering = WO_bdev_flush;
 	list_add_tail_rcu(&resource->resources, &drbd_resources);
 	mutex_init(&resource->conf_update);
 	mutex_init(&resource->adm_mutex);
 	spin_lock_init(&resource->req_lock);
+	drbd_debugfs_resource_add(resource);
 	return resource;
 
 fail_free_name:
@@ -2593,7 +2611,7 @@
 	return NULL;
 }
 
-/* caller must be under genl_lock() */
+/* caller must be under adm_mutex */
 struct drbd_connection *conn_create(const char *name, struct res_opts *res_opts)
 {
 	struct drbd_resource *resource;
@@ -2617,7 +2635,6 @@
 	INIT_LIST_HEAD(&connection->current_epoch->list);
 	connection->epochs = 1;
 	spin_lock_init(&connection->epoch_lock);
-	connection->write_ordering = WO_bdev_flush;
 
 	connection->send.seen_any_write_yet = false;
 	connection->send.current_epoch_nr = 0;
@@ -2652,6 +2669,7 @@
 
 	kref_get(&resource->kref);
 	list_add_tail_rcu(&connection->connections, &resource->connections);
+	drbd_debugfs_connection_add(connection);
 	return connection;
 
 fail_resource:
@@ -2680,6 +2698,7 @@
 	drbd_free_socket(&connection->data);
 	kfree(connection->int_dig_in);
 	kfree(connection->int_dig_vv);
+	memset(connection, 0xfc, sizeof(*connection));
 	kfree(connection);
 	kref_put(&resource->kref, drbd_destroy_resource);
 }
@@ -2694,7 +2713,6 @@
 		return -ENOMEM;
 
 	INIT_WORK(&device->submit.worker, do_submit);
-	spin_lock_init(&device->submit.lock);
 	INIT_LIST_HEAD(&device->submit.writes);
 	return 0;
 }
@@ -2764,8 +2782,8 @@
 	blk_queue_merge_bvec(q, drbd_merge_bvec);
 	q->queue_lock = &resource->req_lock;
 
-	device->md_io_page = alloc_page(GFP_KERNEL);
-	if (!device->md_io_page)
+	device->md_io.page = alloc_page(GFP_KERNEL);
+	if (!device->md_io.page)
 		goto out_no_io_page;
 
 	if (drbd_bm_init(device))
@@ -2794,6 +2812,7 @@
 	kref_get(&device->kref);
 
 	INIT_LIST_HEAD(&device->peer_devices);
+	INIT_LIST_HEAD(&device->pending_bitmap_io);
 	for_each_connection(connection, resource) {
 		peer_device = kzalloc(sizeof(struct drbd_peer_device), GFP_KERNEL);
 		if (!peer_device)
@@ -2829,7 +2848,10 @@
 		for_each_peer_device(peer_device, device)
 			drbd_connected(peer_device);
 	}
-
+	/* move to create_peer_device() */
+	for_each_peer_device(peer_device, device)
+		drbd_debugfs_peer_device_add(peer_device);
+	drbd_debugfs_device_add(device);
 	return NO_ERROR;
 
 out_idr_remove_vol:
@@ -2853,7 +2875,7 @@
 out_no_minor_idr:
 	drbd_bm_cleanup(device);
 out_no_bitmap:
-	__free_page(device->md_io_page);
+	__free_page(device->md_io.page);
 out_no_io_page:
 	put_disk(disk);
 out_no_disk:
@@ -2868,8 +2890,13 @@
 {
 	struct drbd_resource *resource = device->resource;
 	struct drbd_connection *connection;
+	struct drbd_peer_device *peer_device;
 	int refs = 3;
 
+	/* move to free_peer_device() */
+	for_each_peer_device(peer_device, device)
+		drbd_debugfs_peer_device_cleanup(peer_device);
+	drbd_debugfs_device_cleanup(device);
 	for_each_connection(connection, resource) {
 		idr_remove(&connection->peer_devices, device->vnr);
 		refs++;
@@ -2881,13 +2908,12 @@
 	kref_sub(&device->kref, refs, drbd_destroy_device);
 }
 
-int __init drbd_init(void)
+static int __init drbd_init(void)
 {
 	int err;
 
 	if (minor_count < DRBD_MINOR_COUNT_MIN || minor_count > DRBD_MINOR_COUNT_MAX) {
-		printk(KERN_ERR
-		       "drbd: invalid minor_count (%d)\n", minor_count);
+		pr_err("invalid minor_count (%d)\n", minor_count);
 #ifdef MODULE
 		return -EINVAL;
 #else
@@ -2897,14 +2923,11 @@
 
 	err = register_blkdev(DRBD_MAJOR, "drbd");
 	if (err) {
-		printk(KERN_ERR
-		       "drbd: unable to register block device major %d\n",
+		pr_err("unable to register block device major %d\n",
 		       DRBD_MAJOR);
 		return err;
 	}
 
-	register_reboot_notifier(&drbd_notifier);
-
 	/*
 	 * allocate all necessary structs
 	 */
@@ -2918,7 +2941,7 @@
 
 	err = drbd_genl_register();
 	if (err) {
-		printk(KERN_ERR "drbd: unable to register generic netlink family\n");
+		pr_err("unable to register generic netlink family\n");
 		goto fail;
 	}
 
@@ -2929,38 +2952,39 @@
 	err = -ENOMEM;
 	drbd_proc = proc_create_data("drbd", S_IFREG | S_IRUGO , NULL, &drbd_proc_fops, NULL);
 	if (!drbd_proc)	{
-		printk(KERN_ERR "drbd: unable to register proc file\n");
+		pr_err("unable to register proc file\n");
 		goto fail;
 	}
 
 	retry.wq = create_singlethread_workqueue("drbd-reissue");
 	if (!retry.wq) {
-		printk(KERN_ERR "drbd: unable to create retry workqueue\n");
+		pr_err("unable to create retry workqueue\n");
 		goto fail;
 	}
 	INIT_WORK(&retry.worker, do_retry);
 	spin_lock_init(&retry.lock);
 	INIT_LIST_HEAD(&retry.writes);
 
-	printk(KERN_INFO "drbd: initialized. "
+	if (drbd_debugfs_init())
+		pr_notice("failed to initialize debugfs -- will not be available\n");
+
+	pr_info("initialized. "
 	       "Version: " REL_VERSION " (api:%d/proto:%d-%d)\n",
 	       API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX);
-	printk(KERN_INFO "drbd: %s\n", drbd_buildtag());
-	printk(KERN_INFO "drbd: registered as block device major %d\n",
-		DRBD_MAJOR);
-
+	pr_info("%s\n", drbd_buildtag());
+	pr_info("registered as block device major %d\n", DRBD_MAJOR);
 	return 0; /* Success! */
 
 fail:
 	drbd_cleanup();
 	if (err == -ENOMEM)
-		printk(KERN_ERR "drbd: ran out of memory\n");
+		pr_err("ran out of memory\n");
 	else
-		printk(KERN_ERR "drbd: initialization failure\n");
+		pr_err("initialization failure\n");
 	return err;
 }
 
-void drbd_free_bc(struct drbd_backing_dev *ldev)
+void drbd_free_ldev(struct drbd_backing_dev *ldev)
 {
 	if (ldev == NULL)
 		return;
@@ -2972,22 +2996,27 @@
 	kfree(ldev);
 }
 
+static void drbd_free_one_sock(struct drbd_socket *ds)
+{
+	struct socket *s;
+	mutex_lock(&ds->mutex);
+	s = ds->socket;
+	ds->socket = NULL;
+	mutex_unlock(&ds->mutex);
+	if (s) {
+		/* so debugfs does not need to mutex_lock() */
+		synchronize_rcu();
+		kernel_sock_shutdown(s, SHUT_RDWR);
+		sock_release(s);
+	}
+}
+
 void drbd_free_sock(struct drbd_connection *connection)
 {
-	if (connection->data.socket) {
-		mutex_lock(&connection->data.mutex);
-		kernel_sock_shutdown(connection->data.socket, SHUT_RDWR);
-		sock_release(connection->data.socket);
-		connection->data.socket = NULL;
-		mutex_unlock(&connection->data.mutex);
-	}
-	if (connection->meta.socket) {
-		mutex_lock(&connection->meta.mutex);
-		kernel_sock_shutdown(connection->meta.socket, SHUT_RDWR);
-		sock_release(connection->meta.socket);
-		connection->meta.socket = NULL;
-		mutex_unlock(&connection->meta.mutex);
-	}
+	if (connection->data.socket)
+		drbd_free_one_sock(&connection->data);
+	if (connection->meta.socket)
+		drbd_free_one_sock(&connection->meta);
 }
 
 /* meta data management */
@@ -3093,7 +3122,7 @@
 	if (!get_ldev_if_state(device, D_FAILED))
 		return;
 
-	buffer = drbd_md_get_buffer(device);
+	buffer = drbd_md_get_buffer(device, __func__);
 	if (!buffer)
 		goto out;
 
@@ -3253,7 +3282,7 @@
 	if (device->state.disk != D_DISKLESS)
 		return ERR_DISK_CONFIGURED;
 
-	buffer = drbd_md_get_buffer(device);
+	buffer = drbd_md_get_buffer(device, __func__);
 	if (!buffer)
 		return ERR_NOMEM;
 
@@ -3466,23 +3495,19 @@
  *
  * Sets all bits in the bitmap and writes the whole bitmap to stable storage.
  */
-int drbd_bmio_set_n_write(struct drbd_device *device)
+int drbd_bmio_set_n_write(struct drbd_device *device) __must_hold(local)
 {
 	int rv = -EIO;
 
-	if (get_ldev_if_state(device, D_ATTACHING)) {
-		drbd_md_set_flag(device, MDF_FULL_SYNC);
+	drbd_md_set_flag(device, MDF_FULL_SYNC);
+	drbd_md_sync(device);
+	drbd_bm_set_all(device);
+
+	rv = drbd_bm_write(device);
+
+	if (!rv) {
+		drbd_md_clear_flag(device, MDF_FULL_SYNC);
 		drbd_md_sync(device);
-		drbd_bm_set_all(device);
-
-		rv = drbd_bm_write(device);
-
-		if (!rv) {
-			drbd_md_clear_flag(device, MDF_FULL_SYNC);
-			drbd_md_sync(device);
-		}
-
-		put_ldev(device);
 	}
 
 	return rv;
@@ -3494,18 +3519,11 @@
  *
  * Clears all bits in the bitmap and writes the whole bitmap to stable storage.
  */
-int drbd_bmio_clear_n_write(struct drbd_device *device)
+int drbd_bmio_clear_n_write(struct drbd_device *device) __must_hold(local)
 {
-	int rv = -EIO;
-
 	drbd_resume_al(device);
-	if (get_ldev_if_state(device, D_ATTACHING)) {
-		drbd_bm_clear_all(device);
-		rv = drbd_bm_write(device);
-		put_ldev(device);
-	}
-
-	return rv;
+	drbd_bm_clear_all(device);
+	return drbd_bm_write(device);
 }
 
 static int w_bitmap_io(struct drbd_work *w, int unused)
@@ -3537,61 +3555,6 @@
 	return 0;
 }
 
-void drbd_ldev_destroy(struct drbd_device *device)
-{
-	lc_destroy(device->resync);
-	device->resync = NULL;
-	lc_destroy(device->act_log);
-	device->act_log = NULL;
-	__no_warn(local,
-		drbd_free_bc(device->ldev);
-		device->ldev = NULL;);
-
-	clear_bit(GO_DISKLESS, &device->flags);
-}
-
-static int w_go_diskless(struct drbd_work *w, int unused)
-{
-	struct drbd_device *device =
-		container_of(w, struct drbd_device, go_diskless);
-
-	D_ASSERT(device, device->state.disk == D_FAILED);
-	/* we cannot assert local_cnt == 0 here, as get_ldev_if_state will
-	 * inc/dec it frequently. Once we are D_DISKLESS, no one will touch
-	 * the protected members anymore, though, so once put_ldev reaches zero
-	 * again, it will be safe to free them. */
-
-	/* Try to write changed bitmap pages, read errors may have just
-	 * set some bits outside the area covered by the activity log.
-	 *
-	 * If we have an IO error during the bitmap writeout,
-	 * we will want a full sync next time, just in case.
-	 * (Do we want a specific meta data flag for this?)
-	 *
-	 * If that does not make it to stable storage either,
-	 * we cannot do anything about that anymore.
-	 *
-	 * We still need to check if both bitmap and ldev are present, we may
-	 * end up here after a failed attach, before ldev was even assigned.
-	 */
-	if (device->bitmap && device->ldev) {
-		/* An interrupted resync or similar is allowed to recounts bits
-		 * while we detach.
-		 * Any modifications would not be expected anymore, though.
-		 */
-		if (drbd_bitmap_io_from_worker(device, drbd_bm_write,
-					"detach", BM_LOCKED_TEST_ALLOWED)) {
-			if (test_bit(WAS_READ_ERROR, &device->flags)) {
-				drbd_md_set_flag(device, MDF_FULL_SYNC);
-				drbd_md_sync(device);
-			}
-		}
-	}
-
-	drbd_force_state(device, NS(disk, D_DISKLESS));
-	return 0;
-}
-
 /**
  * drbd_queue_bitmap_io() - Queues an IO operation on the whole bitmap
  * @device:	DRBD device.
@@ -3603,6 +3566,9 @@
  * that drbd_set_out_of_sync() can not be called. This function MAY ONLY be
  * called from worker context. It MUST NOT be used while a previous such
  * work is still pending!
+ *
+ * Its worker function encloses the call of io_fn() by get_ldev() and
+ * put_ldev().
  */
 void drbd_queue_bitmap_io(struct drbd_device *device,
 			  int (*io_fn)(struct drbd_device *),
@@ -3685,25 +3651,7 @@
 static void md_sync_timer_fn(unsigned long data)
 {
 	struct drbd_device *device = (struct drbd_device *) data;
-
-	/* must not double-queue! */
-	if (list_empty(&device->md_sync_work.list))
-		drbd_queue_work_front(&first_peer_device(device)->connection->sender_work,
-				      &device->md_sync_work);
-}
-
-static int w_md_sync(struct drbd_work *w, int unused)
-{
-	struct drbd_device *device =
-		container_of(w, struct drbd_device, md_sync_work);
-
-	drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n");
-#ifdef DEBUG
-	drbd_warn(device, "last md_mark_dirty: %s:%u\n",
-		device->last_md_mark_dirty.func, device->last_md_mark_dirty.line);
-#endif
-	drbd_md_sync(device);
-	return 0;
+	drbd_device_post_work(device, MD_SYNC);
 }
 
 const char *cmdname(enum drbd_packet cmd)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 3f2e167..1cd47df 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -23,6 +23,8 @@
 
  */
 
+#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/drbd.h>
 #include <linux/in.h>
@@ -85,7 +87,7 @@
 {
 	genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb))));
 	if (genlmsg_reply(skb, info))
-		printk(KERN_ERR "drbd: error sending genl reply\n");
+		pr_err("error sending genl reply\n");
 }
 
 /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only
@@ -558,8 +560,10 @@
 }
 
 enum drbd_state_rv
-drbd_set_role(struct drbd_device *device, enum drbd_role new_role, int force)
+drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force)
 {
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
 	const int max_tries = 4;
 	enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
 	struct net_conf *nc;
@@ -607,7 +611,7 @@
 		    device->state.disk == D_CONSISTENT && mask.pdsk == 0) {
 			D_ASSERT(device, device->state.pdsk == D_UNKNOWN);
 
-			if (conn_try_outdate_peer(first_peer_device(device)->connection)) {
+			if (conn_try_outdate_peer(connection)) {
 				val.disk = D_UP_TO_DATE;
 				mask.disk = D_MASK;
 			}
@@ -617,7 +621,7 @@
 		if (rv == SS_NOTHING_TO_DO)
 			goto out;
 		if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
-			if (!conn_try_outdate_peer(first_peer_device(device)->connection) && force) {
+			if (!conn_try_outdate_peer(connection) && force) {
 				drbd_warn(device, "Forced into split brain situation!\n");
 				mask.pdsk = D_MASK;
 				val.pdsk  = D_OUTDATED;
@@ -630,7 +634,7 @@
 			   retry at most once more in this case. */
 			int timeo;
 			rcu_read_lock();
-			nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
+			nc = rcu_dereference(connection->net_conf);
 			timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
 			rcu_read_unlock();
 			schedule_timeout_interruptible(timeo);
@@ -659,19 +663,17 @@
 	/* FIXME also wait for all pending P_BARRIER_ACK? */
 
 	if (new_role == R_SECONDARY) {
-		set_disk_ro(device->vdisk, true);
 		if (get_ldev(device)) {
 			device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
 			put_ldev(device);
 		}
 	} else {
-		/* Called from drbd_adm_set_role only.
-		 * We are still holding the conf_update mutex. */
-		nc = first_peer_device(device)->connection->net_conf;
+		mutex_lock(&device->resource->conf_update);
+		nc = connection->net_conf;
 		if (nc)
 			nc->discard_my_data = 0; /* without copy; single bit op is atomic */
+		mutex_unlock(&device->resource->conf_update);
 
-		set_disk_ro(device->vdisk, false);
 		if (get_ldev(device)) {
 			if (((device->state.conn < C_CONNECTED ||
 			       device->state.pdsk <= D_FAILED)
@@ -689,12 +691,12 @@
 	if (device->state.conn >= C_WF_REPORT_PARAMS) {
 		/* if this was forced, we should consider sync */
 		if (forced)
-			drbd_send_uuids(first_peer_device(device));
-		drbd_send_current_state(first_peer_device(device));
+			drbd_send_uuids(peer_device);
+		drbd_send_current_state(peer_device);
 	}
 
 	drbd_md_sync(device);
-
+	set_disk_ro(device->vdisk, new_role == R_SECONDARY);
 	kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
 out:
 	mutex_unlock(device->state_mutex);
@@ -891,7 +893,7 @@
 	 * still lock the act_log to not trigger ASSERTs there.
 	 */
 	drbd_suspend_io(device);
-	buffer = drbd_md_get_buffer(device); /* Lock meta-data IO */
+	buffer = drbd_md_get_buffer(device, __func__); /* Lock meta-data IO */
 	if (!buffer) {
 		drbd_resume_io(device);
 		return DS_ERROR;
@@ -971,6 +973,10 @@
 	if (la_size_changed || md_moved || rs) {
 		u32 prev_flags;
 
+		/* We do some synchronous IO below, which may take some time.
+		 * Clear the timer, to avoid scary "timer expired!" messages,
+		 * "Superblock" is written out at least twice below, anyways. */
+		del_timer(&device->md_sync_timer);
 		drbd_al_shrink(device); /* All extents inactive. */
 
 		prev_flags = md->flags;
@@ -1116,15 +1122,16 @@
 	return 0;
 }
 
-static void drbd_setup_queue_param(struct drbd_device *device, unsigned int max_bio_size)
+static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev,
+				   unsigned int max_bio_size)
 {
 	struct request_queue * const q = device->rq_queue;
 	unsigned int max_hw_sectors = max_bio_size >> 9;
 	unsigned int max_segments = 0;
 	struct request_queue *b = NULL;
 
-	if (get_ldev_if_state(device, D_ATTACHING)) {
-		b = device->ldev->backing_bdev->bd_disk->queue;
+	if (bdev) {
+		b = bdev->backing_bdev->bd_disk->queue;
 
 		max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
 		rcu_read_lock();
@@ -1169,11 +1176,10 @@
 				 b->backing_dev_info.ra_pages);
 			q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
 		}
-		put_ldev(device);
 	}
 }
 
-void drbd_reconsider_max_bio_size(struct drbd_device *device)
+void drbd_reconsider_max_bio_size(struct drbd_device *device, struct drbd_backing_dev *bdev)
 {
 	unsigned int now, new, local, peer;
 
@@ -1181,10 +1187,9 @@
 	local = device->local_max_bio_size; /* Eventually last known value, from volatile memory */
 	peer = device->peer_max_bio_size; /* Eventually last known value, from meta data */
 
-	if (get_ldev_if_state(device, D_ATTACHING)) {
-		local = queue_max_hw_sectors(device->ldev->backing_bdev->bd_disk->queue) << 9;
+	if (bdev) {
+		local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9;
 		device->local_max_bio_size = local;
-		put_ldev(device);
 	}
 	local = min(local, DRBD_MAX_BIO_SIZE);
 
@@ -1217,7 +1222,7 @@
 	if (new != now)
 		drbd_info(device, "max BIO size = %u\n", new);
 
-	drbd_setup_queue_param(device, new);
+	drbd_setup_queue_param(device, bdev, new);
 }
 
 /* Starts the worker thread */
@@ -1299,6 +1304,13 @@
 	return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION;
 }
 
+static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b)
+{
+	return	a->disk_barrier != b->disk_barrier ||
+		a->disk_flushes != b->disk_flushes ||
+		a->disk_drain != b->disk_drain;
+}
+
 int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
 {
 	struct drbd_config_context adm_ctx;
@@ -1405,7 +1417,8 @@
 	else
 		set_bit(MD_NO_FUA, &device->flags);
 
-	drbd_bump_write_ordering(first_peer_device(device)->connection, WO_bdev_flush);
+	if (write_ordering_changed(old_disk_conf, new_disk_conf))
+		drbd_bump_write_ordering(device->resource, NULL, WO_bdev_flush);
 
 	drbd_md_sync(device);
 
@@ -1440,6 +1453,8 @@
 {
 	struct drbd_config_context adm_ctx;
 	struct drbd_device *device;
+	struct drbd_peer_device *peer_device;
+	struct drbd_connection *connection;
 	int err;
 	enum drbd_ret_code retcode;
 	enum determine_dev_size dd;
@@ -1462,7 +1477,9 @@
 
 	device = adm_ctx.device;
 	mutex_lock(&adm_ctx.resource->adm_mutex);
-	conn_reconfig_start(first_peer_device(device)->connection);
+	peer_device = first_peer_device(device);
+	connection = peer_device ? peer_device->connection : NULL;
+	conn_reconfig_start(connection);
 
 	/* if you want to reconfigure, please tear down first */
 	if (device->state.disk > D_DISKLESS) {
@@ -1473,7 +1490,7 @@
 	 * drbd_ldev_destroy is done already, we may end up here very fast,
 	 * e.g. if someone calls attach from the on-io-error handler,
 	 * to realize a "hot spare" feature (not that I'd recommend that) */
-	wait_event(device->misc_wait, !atomic_read(&device->local_cnt));
+	wait_event(device->misc_wait, !test_bit(GOING_DISKLESS, &device->flags));
 
 	/* make sure there is no leftover from previous force-detach attempts */
 	clear_bit(FORCE_DETACH, &device->flags);
@@ -1529,7 +1546,7 @@
 		goto fail;
 
 	rcu_read_lock();
-	nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
+	nc = rcu_dereference(connection->net_conf);
 	if (nc) {
 		if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
 			rcu_read_unlock();
@@ -1649,7 +1666,7 @@
 	 */
 	wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device));
 	/* and for any other previously queued work */
-	drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);
+	drbd_flush_workqueue(&connection->sender_work);
 
 	rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE);
 	retcode = rv;  /* FIXME: Type mismatch. */
@@ -1710,7 +1727,7 @@
 	new_disk_conf = NULL;
 	new_plan = NULL;
 
-	drbd_bump_write_ordering(first_peer_device(device)->connection, WO_bdev_flush);
+	drbd_bump_write_ordering(device->resource, device->ldev, WO_bdev_flush);
 
 	if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY))
 		set_bit(CRASHED_PRIMARY, &device->flags);
@@ -1726,7 +1743,7 @@
 	device->read_cnt = 0;
 	device->writ_cnt = 0;
 
-	drbd_reconsider_max_bio_size(device);
+	drbd_reconsider_max_bio_size(device, device->ldev);
 
 	/* If I am currently not R_PRIMARY,
 	 * but meta data primary indicator is set,
@@ -1845,7 +1862,7 @@
 
 	kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
 	put_ldev(device);
-	conn_reconfig_done(first_peer_device(device)->connection);
+	conn_reconfig_done(connection);
 	mutex_unlock(&adm_ctx.resource->adm_mutex);
 	drbd_adm_finish(&adm_ctx, info, retcode);
 	return 0;
@@ -1856,7 +1873,7 @@
 	drbd_force_state(device, NS(disk, D_DISKLESS));
 	drbd_md_sync(device);
  fail:
-	conn_reconfig_done(first_peer_device(device)->connection);
+	conn_reconfig_done(connection);
 	if (nbc) {
 		if (nbc->backing_bdev)
 			blkdev_put(nbc->backing_bdev,
@@ -1888,7 +1905,7 @@
 	}
 
 	drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */
-	drbd_md_get_buffer(device); /* make sure there is no in-flight meta-data IO */
+	drbd_md_get_buffer(device, __func__); /* make sure there is no in-flight meta-data IO */
 	retcode = drbd_request_state(device, NS(disk, D_FAILED));
 	drbd_md_put_buffer(device);
 	/* D_FAILED will transition to DISKLESS. */
@@ -2654,8 +2671,13 @@
 	if (retcode != NO_ERROR)
 		goto out;
 
-	mutex_lock(&adm_ctx.resource->adm_mutex);
 	device = adm_ctx.device;
+	if (!get_ldev(device)) {
+		retcode = ERR_NO_DISK;
+		goto out;
+	}
+
+	mutex_lock(&adm_ctx.resource->adm_mutex);
 
 	/* If there is still bitmap IO pending, probably because of a previous
 	 * resync just being finished, wait for it before requesting a new resync.
@@ -2679,6 +2701,7 @@
 		retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T));
 	drbd_resume_io(device);
 	mutex_unlock(&adm_ctx.resource->adm_mutex);
+	put_ldev(device);
 out:
 	drbd_adm_finish(&adm_ctx, info, retcode);
 	return 0;
@@ -2704,7 +2727,7 @@
 	return 0;
 }
 
-static int drbd_bmio_set_susp_al(struct drbd_device *device)
+static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local)
 {
 	int rv;
 
@@ -2725,8 +2748,13 @@
 	if (retcode != NO_ERROR)
 		goto out;
 
-	mutex_lock(&adm_ctx.resource->adm_mutex);
 	device = adm_ctx.device;
+	if (!get_ldev(device)) {
+		retcode = ERR_NO_DISK;
+		goto out;
+	}
+
+	mutex_lock(&adm_ctx.resource->adm_mutex);
 
 	/* If there is still bitmap IO pending, probably because of a previous
 	 * resync just being finished, wait for it before requesting a new resync.
@@ -2753,6 +2781,7 @@
 		retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S));
 	drbd_resume_io(device);
 	mutex_unlock(&adm_ctx.resource->adm_mutex);
+	put_ldev(device);
 out:
 	drbd_adm_finish(&adm_ctx, info, retcode);
 	return 0;
@@ -2892,7 +2921,7 @@
 	return list_first_entry(&resource->connections, struct drbd_connection, connections);
 }
 
-int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device,
+static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device,
 		const struct sib_info *sib)
 {
 	struct drbd_resource *resource = device->resource;
@@ -3622,13 +3651,6 @@
 	unsigned seq;
 	int err = -ENOMEM;
 
-	if (sib->sib_reason == SIB_SYNC_PROGRESS) {
-		if (time_after(jiffies, device->rs_last_bcast + HZ))
-			device->rs_last_bcast = jiffies;
-		else
-			return;
-	}
-
 	seq = atomic_inc_return(&drbd_genl_seq);
 	msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
 	if (!msg)
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index 89736bd..06e6147 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -60,20 +60,65 @@
 		seq_printf(seq, "%ld", v);
 }
 
+static void drbd_get_syncer_progress(struct drbd_device *device,
+		union drbd_dev_state state, unsigned long *rs_total,
+		unsigned long *bits_left, unsigned int *per_mil_done)
+{
+	/* this is to break it at compile time when we change that, in case we
+	 * want to support more than (1<<32) bits on a 32bit arch. */
+	typecheck(unsigned long, device->rs_total);
+	*rs_total = device->rs_total;
+
+	/* note: both rs_total and rs_left are in bits, i.e. in
+	 * units of BM_BLOCK_SIZE.
+	 * for the percentage, we don't care. */
+
+	if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T)
+		*bits_left = device->ov_left;
+	else
+		*bits_left = drbd_bm_total_weight(device) - device->rs_failed;
+	/* >> 10 to prevent overflow,
+	 * +1 to prevent division by zero */
+	if (*bits_left > *rs_total) {
+		/* D'oh. Maybe a logic bug somewhere.  More likely just a race
+		 * between state change and reset of rs_total.
+		 */
+		*bits_left = *rs_total;
+		*per_mil_done = *rs_total ? 0 : 1000;
+	} else {
+		/* Make sure the division happens in long context.
+		 * We allow up to one petabyte storage right now,
+		 * at a granularity of 4k per bit that is 2**38 bits.
+		 * After shift right and multiplication by 1000,
+		 * this should still fit easily into a 32bit long,
+		 * so we don't need a 64bit division on 32bit arch.
+		 * Note: currently we don't support such large bitmaps on 32bit
+		 * arch anyways, but no harm done to be prepared for it here.
+		 */
+		unsigned int shift = *rs_total > UINT_MAX ? 16 : 10;
+		unsigned long left = *bits_left >> shift;
+		unsigned long total = 1UL + (*rs_total >> shift);
+		unsigned long tmp = 1000UL - left * 1000UL/total;
+		*per_mil_done = tmp;
+	}
+}
+
+
 /*lge
  * progress bars shamelessly adapted from driver/md/md.c
  * output looks like
  *	[=====>..............] 33.5% (23456/123456)
  *	finish: 2:20:20 speed: 6,345 (6,456) K/sec
  */
-static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *seq)
+static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *seq,
+		union drbd_dev_state state)
 {
-	unsigned long db, dt, dbdt, rt, rs_left;
+	unsigned long db, dt, dbdt, rt, rs_total, rs_left;
 	unsigned int res;
 	int i, x, y;
 	int stalled = 0;
 
-	drbd_get_syncer_progress(device, &rs_left, &res);
+	drbd_get_syncer_progress(device, state, &rs_total, &rs_left, &res);
 
 	x = res/50;
 	y = 20-x;
@@ -85,21 +130,21 @@
 		seq_printf(seq, ".");
 	seq_printf(seq, "] ");
 
-	if (device->state.conn == C_VERIFY_S || device->state.conn == C_VERIFY_T)
+	if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T)
 		seq_printf(seq, "verified:");
 	else
 		seq_printf(seq, "sync'ed:");
 	seq_printf(seq, "%3u.%u%% ", res / 10, res % 10);
 
 	/* if more than a few GB, display in MB */
-	if (device->rs_total > (4UL << (30 - BM_BLOCK_SHIFT)))
+	if (rs_total > (4UL << (30 - BM_BLOCK_SHIFT)))
 		seq_printf(seq, "(%lu/%lu)M",
 			    (unsigned long) Bit2KB(rs_left >> 10),
-			    (unsigned long) Bit2KB(device->rs_total >> 10));
+			    (unsigned long) Bit2KB(rs_total >> 10));
 	else
 		seq_printf(seq, "(%lu/%lu)K\n\t",
 			    (unsigned long) Bit2KB(rs_left),
-			    (unsigned long) Bit2KB(device->rs_total));
+			    (unsigned long) Bit2KB(rs_total));
 
 	/* see drivers/md/md.c
 	 * We do not want to overflow, so the order of operands and
@@ -150,13 +195,13 @@
 	dt = (jiffies - device->rs_start - device->rs_paused) / HZ;
 	if (dt == 0)
 		dt = 1;
-	db = device->rs_total - rs_left;
+	db = rs_total - rs_left;
 	dbdt = Bit2KB(db/dt);
 	seq_printf_with_thousands_grouping(seq, dbdt);
 	seq_printf(seq, ")");
 
-	if (device->state.conn == C_SYNC_TARGET ||
-	    device->state.conn == C_VERIFY_S) {
+	if (state.conn == C_SYNC_TARGET ||
+	    state.conn == C_VERIFY_S) {
 		seq_printf(seq, " want: ");
 		seq_printf_with_thousands_grouping(seq, device->c_sync_rate);
 	}
@@ -168,8 +213,8 @@
 		unsigned long bm_bits = drbd_bm_bits(device);
 		unsigned long bit_pos;
 		unsigned long long stop_sector = 0;
-		if (device->state.conn == C_VERIFY_S ||
-		    device->state.conn == C_VERIFY_T) {
+		if (state.conn == C_VERIFY_S ||
+		    state.conn == C_VERIFY_T) {
 			bit_pos = bm_bits - device->ov_left;
 			if (verify_can_do_stop_sector(device))
 				stop_sector = device->ov_stop_sector;
@@ -188,22 +233,13 @@
 	}
 }
 
-static void resync_dump_detail(struct seq_file *seq, struct lc_element *e)
-{
-	struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
-
-	seq_printf(seq, "%5d %s %s\n", bme->rs_left,
-		   bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------",
-		   bme->flags & BME_LOCKED ? "LOCKED" : "------"
-		   );
-}
-
 static int drbd_seq_show(struct seq_file *seq, void *v)
 {
 	int i, prev_i = -1;
 	const char *sn;
 	struct drbd_device *device;
 	struct net_conf *nc;
+	union drbd_dev_state state;
 	char wp;
 
 	static char write_ordering_chars[] = {
@@ -241,11 +277,12 @@
 			seq_printf(seq, "\n");
 		prev_i = i;
 
-		sn = drbd_conn_str(device->state.conn);
+		state = device->state;
+		sn = drbd_conn_str(state.conn);
 
-		if (device->state.conn == C_STANDALONE &&
-		    device->state.disk == D_DISKLESS &&
-		    device->state.role == R_SECONDARY) {
+		if (state.conn == C_STANDALONE &&
+		    state.disk == D_DISKLESS &&
+		    state.role == R_SECONDARY) {
 			seq_printf(seq, "%2d: cs:Unconfigured\n", i);
 		} else {
 			/* reset device->congestion_reason */
@@ -258,15 +295,15 @@
 			   "    ns:%u nr:%u dw:%u dr:%u al:%u bm:%u "
 			   "lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c",
 			   i, sn,
-			   drbd_role_str(device->state.role),
-			   drbd_role_str(device->state.peer),
-			   drbd_disk_str(device->state.disk),
-			   drbd_disk_str(device->state.pdsk),
+			   drbd_role_str(state.role),
+			   drbd_role_str(state.peer),
+			   drbd_disk_str(state.disk),
+			   drbd_disk_str(state.pdsk),
 			   wp,
 			   drbd_suspended(device) ? 's' : 'r',
-			   device->state.aftr_isp ? 'a' : '-',
-			   device->state.peer_isp ? 'p' : '-',
-			   device->state.user_isp ? 'u' : '-',
+			   state.aftr_isp ? 'a' : '-',
+			   state.peer_isp ? 'p' : '-',
+			   state.user_isp ? 'u' : '-',
 			   device->congestion_reason ?: '-',
 			   test_bit(AL_SUSPENDED, &device->flags) ? 's' : '-',
 			   device->send_cnt/2,
@@ -281,17 +318,17 @@
 			   atomic_read(&device->unacked_cnt),
 			   atomic_read(&device->ap_bio_cnt),
 			   first_peer_device(device)->connection->epochs,
-			   write_ordering_chars[first_peer_device(device)->connection->write_ordering]
+			   write_ordering_chars[device->resource->write_ordering]
 			);
 			seq_printf(seq, " oos:%llu\n",
 				   Bit2KB((unsigned long long)
 					   drbd_bm_total_weight(device)));
 		}
-		if (device->state.conn == C_SYNC_SOURCE ||
-		    device->state.conn == C_SYNC_TARGET ||
-		    device->state.conn == C_VERIFY_S ||
-		    device->state.conn == C_VERIFY_T)
-			drbd_syncer_progress(device, seq);
+		if (state.conn == C_SYNC_SOURCE ||
+		    state.conn == C_SYNC_TARGET ||
+		    state.conn == C_VERIFY_S ||
+		    state.conn == C_VERIFY_T)
+			drbd_syncer_progress(device, seq, state);
 
 		if (proc_details >= 1 && get_ldev_if_state(device, D_FAILED)) {
 			lc_seq_printf_stats(seq, device->resync);
@@ -299,12 +336,8 @@
 			put_ldev(device);
 		}
 
-		if (proc_details >= 2) {
-			if (device->resync) {
-				lc_seq_dump_details(seq, device->resync, "rs_left",
-					resync_dump_detail);
-			}
-		}
+		if (proc_details >= 2)
+			seq_printf(seq, "\tblocked on activity log: %d\n", atomic_read(&device->ap_actlog_cnt));
 	}
 	rcu_read_unlock();
 
@@ -316,7 +349,7 @@
 	int err;
 
 	if (try_module_get(THIS_MODULE)) {
-		err = single_open(file, drbd_seq_show, PDE_DATA(inode));
+		err = single_open(file, drbd_seq_show, NULL);
 		if (err)
 			module_put(THIS_MODULE);
 		return err;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 5b17ec8..9342b8d 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -362,17 +362,14 @@
 			goto fail;
 	}
 
+	memset(peer_req, 0, sizeof(*peer_req));
+	INIT_LIST_HEAD(&peer_req->w.list);
 	drbd_clear_interval(&peer_req->i);
 	peer_req->i.size = data_size;
 	peer_req->i.sector = sector;
-	peer_req->i.local = false;
-	peer_req->i.waiting = false;
-
-	peer_req->epoch = NULL;
+	peer_req->submit_jif = jiffies;
 	peer_req->peer_device = peer_device;
 	peer_req->pages = page;
-	atomic_set(&peer_req->pending_bios, 0);
-	peer_req->flags = 0;
 	/*
 	 * The block_id is opaque to the receiver.  It is not endianness
 	 * converted, and sent back to the sender unchanged.
@@ -389,11 +386,16 @@
 void __drbd_free_peer_req(struct drbd_device *device, struct drbd_peer_request *peer_req,
 		       int is_net)
 {
+	might_sleep();
 	if (peer_req->flags & EE_HAS_DIGEST)
 		kfree(peer_req->digest);
 	drbd_free_pages(device, peer_req->pages, is_net);
 	D_ASSERT(device, atomic_read(&peer_req->pending_bios) == 0);
 	D_ASSERT(device, drbd_interval_empty(&peer_req->i));
+	if (!expect(!(peer_req->flags & EE_CALL_AL_COMPLETE_IO))) {
+		peer_req->flags &= ~EE_CALL_AL_COMPLETE_IO;
+		drbd_al_complete_io(device, &peer_req->i);
+	}
 	mempool_free(peer_req, drbd_ee_mempool);
 }
 
@@ -791,8 +793,18 @@
 {
 	unsigned int header_size = drbd_header_size(connection);
 	struct packet_info pi;
+	struct net_conf *nc;
 	int err;
 
+	rcu_read_lock();
+	nc = rcu_dereference(connection->net_conf);
+	if (!nc) {
+		rcu_read_unlock();
+		return -EIO;
+	}
+	sock->sk->sk_rcvtimeo = nc->ping_timeo * 4 * HZ / 10;
+	rcu_read_unlock();
+
 	err = drbd_recv_short(sock, connection->data.rbuf, header_size, 0);
 	if (err != header_size) {
 		if (err >= 0)
@@ -809,7 +821,7 @@
  * drbd_socket_okay() - Free the socket if its connection is not okay
  * @sock:	pointer to the pointer to the socket.
  */
-static int drbd_socket_okay(struct socket **sock)
+static bool drbd_socket_okay(struct socket **sock)
 {
 	int rr;
 	char tb[4];
@@ -827,6 +839,30 @@
 		return false;
 	}
 }
+
+static bool connection_established(struct drbd_connection *connection,
+				   struct socket **sock1,
+				   struct socket **sock2)
+{
+	struct net_conf *nc;
+	int timeout;
+	bool ok;
+
+	if (!*sock1 || !*sock2)
+		return false;
+
+	rcu_read_lock();
+	nc = rcu_dereference(connection->net_conf);
+	timeout = (nc->sock_check_timeo ?: nc->ping_timeo) * HZ / 10;
+	rcu_read_unlock();
+	schedule_timeout_interruptible(timeout);
+
+	ok = drbd_socket_okay(sock1);
+	ok = drbd_socket_okay(sock2) && ok;
+
+	return ok;
+}
+
 /* Gets called if a connection is established, or if a new minor gets created
    in a connection */
 int drbd_connected(struct drbd_peer_device *peer_device)
@@ -868,8 +904,8 @@
 	struct drbd_socket sock, msock;
 	struct drbd_peer_device *peer_device;
 	struct net_conf *nc;
-	int vnr, timeout, h, ok;
-	bool discard_my_data;
+	int vnr, timeout, h;
+	bool discard_my_data, ok;
 	enum drbd_state_rv rv;
 	struct accept_wait_data ad = {
 		.connection = connection,
@@ -913,17 +949,8 @@
 			}
 		}
 
-		if (sock.socket && msock.socket) {
-			rcu_read_lock();
-			nc = rcu_dereference(connection->net_conf);
-			timeout = nc->ping_timeo * HZ / 10;
-			rcu_read_unlock();
-			schedule_timeout_interruptible(timeout);
-			ok = drbd_socket_okay(&sock.socket);
-			ok = drbd_socket_okay(&msock.socket) && ok;
-			if (ok)
-				break;
-		}
+		if (connection_established(connection, &sock.socket, &msock.socket))
+			break;
 
 retry:
 		s = drbd_wait_for_connect(connection, &ad);
@@ -969,8 +996,7 @@
 				goto out_release_sockets;
 		}
 
-		ok = drbd_socket_okay(&sock.socket);
-		ok = drbd_socket_okay(&msock.socket) && ok;
+		ok = connection_established(connection, &sock.socket, &msock.socket);
 	} while (!ok);
 
 	if (ad.s_listen)
@@ -1151,7 +1177,7 @@
 	struct drbd_peer_device *peer_device;
 	int vnr;
 
-	if (connection->write_ordering >= WO_bdev_flush) {
+	if (connection->resource->write_ordering >= WO_bdev_flush) {
 		rcu_read_lock();
 		idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
 			struct drbd_device *device = peer_device->device;
@@ -1161,14 +1187,22 @@
 			kref_get(&device->kref);
 			rcu_read_unlock();
 
+			/* Right now, we have only this one synchronous code path
+			 * for flushes between request epochs.
+			 * We may want to make those asynchronous,
+			 * or at least parallelize the flushes to the volume devices.
+			 */
+			device->flush_jif = jiffies;
+			set_bit(FLUSH_PENDING, &device->flags);
 			rv = blkdev_issue_flush(device->ldev->backing_bdev,
 					GFP_NOIO, NULL);
+			clear_bit(FLUSH_PENDING, &device->flags);
 			if (rv) {
 				drbd_info(device, "local disk flush failed with status %d\n", rv);
 				/* would rather check on EOPNOTSUPP, but that is not reliable.
 				 * don't try again for ANY return value != 0
 				 * if (rv == -EOPNOTSUPP) */
-				drbd_bump_write_ordering(connection, WO_drain_io);
+				drbd_bump_write_ordering(connection->resource, NULL, WO_drain_io);
 			}
 			put_ldev(device);
 			kref_put(&device->kref, drbd_destroy_device);
@@ -1257,15 +1291,30 @@
 	return rv;
 }
 
+static enum write_ordering_e
+max_allowed_wo(struct drbd_backing_dev *bdev, enum write_ordering_e wo)
+{
+	struct disk_conf *dc;
+
+	dc = rcu_dereference(bdev->disk_conf);
+
+	if (wo == WO_bdev_flush && !dc->disk_flushes)
+		wo = WO_drain_io;
+	if (wo == WO_drain_io && !dc->disk_drain)
+		wo = WO_none;
+
+	return wo;
+}
+
 /**
  * drbd_bump_write_ordering() - Fall back to an other write ordering method
  * @connection:	DRBD connection.
  * @wo:		Write ordering method to try.
  */
-void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ordering_e wo)
+void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backing_dev *bdev,
+			      enum write_ordering_e wo)
 {
-	struct disk_conf *dc;
-	struct drbd_peer_device *peer_device;
+	struct drbd_device *device;
 	enum write_ordering_e pwo;
 	int vnr;
 	static char *write_ordering_str[] = {
@@ -1274,26 +1323,27 @@
 		[WO_bdev_flush] = "flush",
 	};
 
-	pwo = connection->write_ordering;
-	wo = min(pwo, wo);
+	pwo = resource->write_ordering;
+	if (wo != WO_bdev_flush)
+		wo = min(pwo, wo);
 	rcu_read_lock();
-	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
-		struct drbd_device *device = peer_device->device;
-
-		if (!get_ldev_if_state(device, D_ATTACHING))
-			continue;
-		dc = rcu_dereference(device->ldev->disk_conf);
-
-		if (wo == WO_bdev_flush && !dc->disk_flushes)
-			wo = WO_drain_io;
-		if (wo == WO_drain_io && !dc->disk_drain)
-			wo = WO_none;
-		put_ldev(device);
+	idr_for_each_entry(&resource->devices, device, vnr) {
+		if (get_ldev(device)) {
+			wo = max_allowed_wo(device->ldev, wo);
+			if (device->ldev == bdev)
+				bdev = NULL;
+			put_ldev(device);
+		}
 	}
+
+	if (bdev)
+		wo = max_allowed_wo(bdev, wo);
+
 	rcu_read_unlock();
-	connection->write_ordering = wo;
-	if (pwo != connection->write_ordering || wo == WO_bdev_flush)
-		drbd_info(connection, "Method to ensure write ordering: %s\n", write_ordering_str[connection->write_ordering]);
+
+	resource->write_ordering = wo;
+	if (pwo != resource->write_ordering || wo == WO_bdev_flush)
+		drbd_info(resource, "Method to ensure write ordering: %s\n", write_ordering_str[resource->write_ordering]);
 }
 
 /**
@@ -1330,6 +1380,13 @@
 		/* wait for all pending IO completions, before we start
 		 * zeroing things out. */
 		conn_wait_active_ee_empty(first_peer_device(device)->connection);
+		/* add it to the active list now,
+		 * so we can find it to present it in debugfs */
+		peer_req->submit_jif = jiffies;
+		peer_req->flags |= EE_SUBMITTED;
+		spin_lock_irq(&device->resource->req_lock);
+		list_add_tail(&peer_req->w.list, &device->active_ee);
+		spin_unlock_irq(&device->resource->req_lock);
 		if (blkdev_issue_zeroout(device->ldev->backing_bdev,
 			sector, ds >> 9, GFP_NOIO))
 			peer_req->flags |= EE_WAS_ERROR;
@@ -1398,6 +1455,9 @@
 	D_ASSERT(device, page == NULL);
 
 	atomic_set(&peer_req->pending_bios, n_bios);
+	/* for debugfs: update timestamp, mark as submitted */
+	peer_req->submit_jif = jiffies;
+	peer_req->flags |= EE_SUBMITTED;
 	do {
 		bio = bios;
 		bios = bios->bi_next;
@@ -1471,7 +1531,7 @@
 	 * R_PRIMARY crashes now.
 	 * Therefore we must send the barrier_ack after the barrier request was
 	 * completed. */
-	switch (connection->write_ordering) {
+	switch (connection->resource->write_ordering) {
 	case WO_none:
 		if (rv == FE_RECYCLED)
 			return 0;
@@ -1498,7 +1558,8 @@
 
 		return 0;
 	default:
-		drbd_err(connection, "Strangeness in connection->write_ordering %d\n", connection->write_ordering);
+		drbd_err(connection, "Strangeness in connection->write_ordering %d\n",
+			 connection->resource->write_ordering);
 		return -EIO;
 	}
 
@@ -1531,7 +1592,7 @@
 	struct drbd_peer_request *peer_req;
 	struct page *page;
 	int dgs, ds, err;
-	int data_size = pi->size;
+	unsigned int data_size = pi->size;
 	void *dig_in = peer_device->connection->int_dig_in;
 	void *dig_vv = peer_device->connection->int_dig_vv;
 	unsigned long *data;
@@ -1578,6 +1639,7 @@
 	if (!peer_req)
 		return NULL;
 
+	peer_req->flags |= EE_WRITE;
 	if (trim)
 		return peer_req;
 
@@ -1734,9 +1796,10 @@
 	 * respective _drbd_clear_done_ee */
 
 	peer_req->w.cb = e_end_resync_block;
+	peer_req->submit_jif = jiffies;
 
 	spin_lock_irq(&device->resource->req_lock);
-	list_add(&peer_req->w.list, &device->sync_ee);
+	list_add_tail(&peer_req->w.list, &device->sync_ee);
 	spin_unlock_irq(&device->resource->req_lock);
 
 	atomic_add(pi->size >> 9, &device->rs_sect_ev);
@@ -1889,6 +1952,7 @@
 		}
 		dec_unacked(device);
 	}
+
 	/* we delete from the conflict detection hash _after_ we sent out the
 	 * P_WRITE_ACK / P_NEG_ACK, to get the sequence number right.  */
 	if (peer_req->flags & EE_IN_INTERVAL_TREE) {
@@ -2115,6 +2179,8 @@
 	drbd_for_each_overlap(i, &device->write_requests, sector, size) {
 		if (i == &peer_req->i)
 			continue;
+		if (i->completed)
+			continue;
 
 		if (!i->local) {
 			/*
@@ -2147,7 +2213,6 @@
 					  (unsigned long long)sector, size,
 					  superseded ? "local" : "remote");
 
-			inc_unacked(device);
 			peer_req->w.cb = superseded ? e_send_superseded :
 						   e_send_retry_write;
 			list_add_tail(&peer_req->w.list, &device->done_ee);
@@ -2206,6 +2271,7 @@
 {
 	struct drbd_peer_device *peer_device;
 	struct drbd_device *device;
+	struct net_conf *nc;
 	sector_t sector;
 	struct drbd_peer_request *peer_req;
 	struct p_data *p = pi->data;
@@ -2245,6 +2311,8 @@
 	}
 
 	peer_req->w.cb = e_end_block;
+	peer_req->submit_jif = jiffies;
+	peer_req->flags |= EE_APPLICATION;
 
 	dp_flags = be32_to_cpu(p->dp_flags);
 	rw |= wire_flags_to_bio(dp_flags);
@@ -2271,9 +2339,36 @@
 	spin_unlock(&connection->epoch_lock);
 
 	rcu_read_lock();
-	tp = rcu_dereference(peer_device->connection->net_conf)->two_primaries;
+	nc = rcu_dereference(peer_device->connection->net_conf);
+	tp = nc->two_primaries;
+	if (peer_device->connection->agreed_pro_version < 100) {
+		switch (nc->wire_protocol) {
+		case DRBD_PROT_C:
+			dp_flags |= DP_SEND_WRITE_ACK;
+			break;
+		case DRBD_PROT_B:
+			dp_flags |= DP_SEND_RECEIVE_ACK;
+			break;
+		}
+	}
 	rcu_read_unlock();
+
+	if (dp_flags & DP_SEND_WRITE_ACK) {
+		peer_req->flags |= EE_SEND_WRITE_ACK;
+		inc_unacked(device);
+		/* corresponding dec_unacked() in e_end_block()
+		 * respective _drbd_clear_done_ee */
+	}
+
+	if (dp_flags & DP_SEND_RECEIVE_ACK) {
+		/* I really don't like it that the receiver thread
+		 * sends on the msock, but anyways */
+		drbd_send_ack(first_peer_device(device), P_RECV_ACK, peer_req);
+	}
+
 	if (tp) {
+		/* two primaries implies protocol C */
+		D_ASSERT(device, dp_flags & DP_SEND_WRITE_ACK);
 		peer_req->flags |= EE_IN_INTERVAL_TREE;
 		err = wait_for_and_update_peer_seq(peer_device, peer_seq);
 		if (err)
@@ -2297,44 +2392,18 @@
 	 * active_ee to become empty in drbd_submit_peer_request();
 	 * better not add ourselves here. */
 	if ((peer_req->flags & EE_IS_TRIM_USE_ZEROOUT) == 0)
-		list_add(&peer_req->w.list, &device->active_ee);
+		list_add_tail(&peer_req->w.list, &device->active_ee);
 	spin_unlock_irq(&device->resource->req_lock);
 
 	if (device->state.conn == C_SYNC_TARGET)
 		wait_event(device->ee_wait, !overlapping_resync_write(device, peer_req));
 
-	if (peer_device->connection->agreed_pro_version < 100) {
-		rcu_read_lock();
-		switch (rcu_dereference(peer_device->connection->net_conf)->wire_protocol) {
-		case DRBD_PROT_C:
-			dp_flags |= DP_SEND_WRITE_ACK;
-			break;
-		case DRBD_PROT_B:
-			dp_flags |= DP_SEND_RECEIVE_ACK;
-			break;
-		}
-		rcu_read_unlock();
-	}
-
-	if (dp_flags & DP_SEND_WRITE_ACK) {
-		peer_req->flags |= EE_SEND_WRITE_ACK;
-		inc_unacked(device);
-		/* corresponding dec_unacked() in e_end_block()
-		 * respective _drbd_clear_done_ee */
-	}
-
-	if (dp_flags & DP_SEND_RECEIVE_ACK) {
-		/* I really don't like it that the receiver thread
-		 * sends on the msock, but anyways */
-		drbd_send_ack(first_peer_device(device), P_RECV_ACK, peer_req);
-	}
-
 	if (device->state.pdsk < D_INCONSISTENT) {
 		/* In case we have the only disk of the cluster, */
 		drbd_set_out_of_sync(device, peer_req->i.sector, peer_req->i.size);
-		peer_req->flags |= EE_CALL_AL_COMPLETE_IO;
 		peer_req->flags &= ~EE_MAY_SET_IN_SYNC;
-		drbd_al_begin_io(device, &peer_req->i, true);
+		drbd_al_begin_io(device, &peer_req->i);
+		peer_req->flags |= EE_CALL_AL_COMPLETE_IO;
 	}
 
 	err = drbd_submit_peer_request(device, peer_req, rw, DRBD_FAULT_DT_WR);
@@ -2347,8 +2416,10 @@
 	list_del(&peer_req->w.list);
 	drbd_remove_epoch_entry_interval(device, peer_req);
 	spin_unlock_irq(&device->resource->req_lock);
-	if (peer_req->flags & EE_CALL_AL_COMPLETE_IO)
+	if (peer_req->flags & EE_CALL_AL_COMPLETE_IO) {
+		peer_req->flags &= ~EE_CALL_AL_COMPLETE_IO;
 		drbd_al_complete_io(device, &peer_req->i);
+	}
 
 out_interrupted:
 	drbd_may_finish_epoch(connection, peer_req->epoch, EV_PUT + EV_CLEANUP);
@@ -2368,13 +2439,14 @@
  * The current sync rate used here uses only the most recent two step marks,
  * to have a short time average so we can react faster.
  */
-bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t sector)
+bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t sector,
+		bool throttle_if_app_is_waiting)
 {
 	struct lc_element *tmp;
-	bool throttle = true;
+	bool throttle = drbd_rs_c_min_rate_throttle(device);
 
-	if (!drbd_rs_c_min_rate_throttle(device))
-		return false;
+	if (!throttle || throttle_if_app_is_waiting)
+		return throttle;
 
 	spin_lock_irq(&device->al_lock);
 	tmp = lc_find(device->resync, BM_SECT_TO_EXT(sector));
@@ -2382,7 +2454,8 @@
 		struct bm_extent *bm_ext = lc_entry(tmp, struct bm_extent, lce);
 		if (test_bit(BME_PRIORITY, &bm_ext->flags))
 			throttle = false;
-		/* Do not slow down if app IO is already waiting for this extent */
+		/* Do not slow down if app IO is already waiting for this extent,
+		 * and our progress is necessary for application IO to complete. */
 	}
 	spin_unlock_irq(&device->al_lock);
 
@@ -2407,7 +2480,9 @@
 	curr_events = (int)part_stat_read(&disk->part0, sectors[0]) +
 		      (int)part_stat_read(&disk->part0, sectors[1]) -
 			atomic_read(&device->rs_sect_ev);
-	if (!device->rs_last_events || curr_events - device->rs_last_events > 64) {
+
+	if (atomic_read(&device->ap_actlog_cnt)
+	    || !device->rs_last_events || curr_events - device->rs_last_events > 64) {
 		unsigned long rs_left;
 		int i;
 
@@ -2508,6 +2583,7 @@
 		peer_req->w.cb = w_e_end_data_req;
 		fault_type = DRBD_FAULT_DT_RD;
 		/* application IO, don't drbd_rs_begin_io */
+		peer_req->flags |= EE_APPLICATION;
 		goto submit;
 
 	case P_RS_DATA_REQUEST:
@@ -2538,6 +2614,8 @@
 			peer_req->w.cb = w_e_end_csum_rs_req;
 			/* used in the sector offset progress display */
 			device->bm_resync_fo = BM_SECT_TO_BIT(sector);
+			/* remember to report stats in drbd_resync_finished */
+			device->use_csums = true;
 		} else if (pi->cmd == P_OV_REPLY) {
 			/* track progress, we may need to throttle */
 			atomic_add(size >> 9, &device->rs_sect_in);
@@ -2595,8 +2673,20 @@
 	 * we would also throttle its application reads.
 	 * In that case, throttling is done on the SyncTarget only.
 	 */
-	if (device->state.peer != R_PRIMARY && drbd_rs_should_slow_down(device, sector))
+
+	/* Even though this may be a resync request, we do add to "read_ee";
+	 * "sync_ee" is only used for resync WRITEs.
+	 * Add to list early, so debugfs can find this request
+	 * even if we have to sleep below. */
+	spin_lock_irq(&device->resource->req_lock);
+	list_add_tail(&peer_req->w.list, &device->read_ee);
+	spin_unlock_irq(&device->resource->req_lock);
+
+	update_receiver_timing_details(connection, drbd_rs_should_slow_down);
+	if (device->state.peer != R_PRIMARY
+	&& drbd_rs_should_slow_down(device, sector, false))
 		schedule_timeout_uninterruptible(HZ/10);
+	update_receiver_timing_details(connection, drbd_rs_begin_io);
 	if (drbd_rs_begin_io(device, sector))
 		goto out_free_e;
 
@@ -2604,22 +2694,20 @@
 	atomic_add(size >> 9, &device->rs_sect_ev);
 
 submit:
+	update_receiver_timing_details(connection, drbd_submit_peer_request);
 	inc_unacked(device);
-	spin_lock_irq(&device->resource->req_lock);
-	list_add_tail(&peer_req->w.list, &device->read_ee);
-	spin_unlock_irq(&device->resource->req_lock);
-
 	if (drbd_submit_peer_request(device, peer_req, READ, fault_type) == 0)
 		return 0;
 
 	/* don't care for the reason here */
 	drbd_err(device, "submit failed, triggering re-connect\n");
+
+out_free_e:
 	spin_lock_irq(&device->resource->req_lock);
 	list_del(&peer_req->w.list);
 	spin_unlock_irq(&device->resource->req_lock);
 	/* no drbd_rs_complete_io(), we are dropping the connection anyways */
 
-out_free_e:
 	put_ldev(device);
 	drbd_free_peer_req(device, peer_req);
 	return -EIO;
@@ -2842,8 +2930,10 @@
 -1091   requires proto 91
 -1096   requires proto 96
  */
-static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_hold(local)
+static int drbd_uuid_compare(struct drbd_device *const device, int *rule_nr) __must_hold(local)
 {
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
 	u64 self, peer;
 	int i, j;
 
@@ -2869,7 +2959,7 @@
 
 		if (device->p_uuid[UI_BITMAP] == (u64)0 && device->ldev->md.uuid[UI_BITMAP] != (u64)0) {
 
-			if (first_peer_device(device)->connection->agreed_pro_version < 91)
+			if (connection->agreed_pro_version < 91)
 				return -1091;
 
 			if ((device->ldev->md.uuid[UI_BITMAP] & ~((u64)1)) == (device->p_uuid[UI_HISTORY_START] & ~((u64)1)) &&
@@ -2892,7 +2982,7 @@
 
 		if (device->ldev->md.uuid[UI_BITMAP] == (u64)0 && device->p_uuid[UI_BITMAP] != (u64)0) {
 
-			if (first_peer_device(device)->connection->agreed_pro_version < 91)
+			if (connection->agreed_pro_version < 91)
 				return -1091;
 
 			if ((device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (device->p_uuid[UI_BITMAP] & ~((u64)1)) &&
@@ -2925,7 +3015,7 @@
 		case 1: /*  self_pri && !peer_pri */ return 1;
 		case 2: /* !self_pri &&  peer_pri */ return -1;
 		case 3: /*  self_pri &&  peer_pri */
-			dc = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);
+			dc = test_bit(RESOLVE_CONFLICTS, &connection->flags);
 			return dc ? -1 : 1;
 		}
 	}
@@ -2938,14 +3028,14 @@
 	*rule_nr = 51;
 	peer = device->p_uuid[UI_HISTORY_START] & ~((u64)1);
 	if (self == peer) {
-		if (first_peer_device(device)->connection->agreed_pro_version < 96 ?
+		if (connection->agreed_pro_version < 96 ?
 		    (device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) ==
 		    (device->p_uuid[UI_HISTORY_START + 1] & ~((u64)1)) :
 		    peer + UUID_NEW_BM_OFFSET == (device->p_uuid[UI_BITMAP] & ~((u64)1))) {
 			/* The last P_SYNC_UUID did not get though. Undo the last start of
 			   resync as sync source modifications of the peer's UUIDs. */
 
-			if (first_peer_device(device)->connection->agreed_pro_version < 91)
+			if (connection->agreed_pro_version < 91)
 				return -1091;
 
 			device->p_uuid[UI_BITMAP] = device->p_uuid[UI_HISTORY_START];
@@ -2975,14 +3065,14 @@
 	*rule_nr = 71;
 	self = device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1);
 	if (self == peer) {
-		if (first_peer_device(device)->connection->agreed_pro_version < 96 ?
+		if (connection->agreed_pro_version < 96 ?
 		    (device->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1)) ==
 		    (device->p_uuid[UI_HISTORY_START] & ~((u64)1)) :
 		    self + UUID_NEW_BM_OFFSET == (device->ldev->md.uuid[UI_BITMAP] & ~((u64)1))) {
 			/* The last P_SYNC_UUID did not get though. Undo the last start of
 			   resync as sync source modifications of our UUIDs. */
 
-			if (first_peer_device(device)->connection->agreed_pro_version < 91)
+			if (connection->agreed_pro_version < 91)
 				return -1091;
 
 			__drbd_uuid_set(device, UI_BITMAP, device->ldev->md.uuid[UI_HISTORY_START]);
@@ -3352,8 +3442,7 @@
  * return: NULL (alg name was "")
  *         ERR_PTR(error) if something goes wrong
  *         or the crypto hash ptr, if it worked out ok. */
-static
-struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_device *device,
+static struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_device *device,
 		const char *alg, const char *name)
 {
 	struct crypto_hash *tfm;
@@ -3639,7 +3728,7 @@
 	struct drbd_device *device;
 	struct p_sizes *p = pi->data;
 	enum determine_dev_size dd = DS_UNCHANGED;
-	sector_t p_size, p_usize, my_usize;
+	sector_t p_size, p_usize, p_csize, my_usize;
 	int ldsc = 0; /* local disk size changed */
 	enum dds_flags ddsf;
 
@@ -3650,6 +3739,7 @@
 
 	p_size = be64_to_cpu(p->d_size);
 	p_usize = be64_to_cpu(p->u_size);
+	p_csize = be64_to_cpu(p->c_size);
 
 	/* just store the peer's disk size for now.
 	 * we still need to figure out whether we accept that. */
@@ -3710,7 +3800,6 @@
 	}
 
 	device->peer_max_bio_size = be32_to_cpu(p->max_bio_size);
-	drbd_reconsider_max_bio_size(device);
 	/* Leave drbd_reconsider_max_bio_size() before drbd_determine_dev_size().
 	   In case we cleared the QUEUE_FLAG_DISCARD from our queue in
 	   drbd_reconsider_max_bio_size(), we can be sure that after
@@ -3718,14 +3807,28 @@
 
 	ddsf = be16_to_cpu(p->dds_flags);
 	if (get_ldev(device)) {
+		drbd_reconsider_max_bio_size(device, device->ldev);
 		dd = drbd_determine_dev_size(device, ddsf, NULL);
 		put_ldev(device);
 		if (dd == DS_ERROR)
 			return -EIO;
 		drbd_md_sync(device);
 	} else {
-		/* I am diskless, need to accept the peer's size. */
-		drbd_set_my_capacity(device, p_size);
+		/*
+		 * I am diskless, need to accept the peer's *current* size.
+		 * I must NOT accept the peers backing disk size,
+		 * it may have been larger than mine all along...
+		 *
+		 * At this point, the peer knows more about my disk, or at
+		 * least about what we last agreed upon, than myself.
+		 * So if his c_size is less than his d_size, the most likely
+		 * reason is that *my* d_size was smaller last time we checked.
+		 *
+		 * However, if he sends a zero current size,
+		 * take his (user-capped or) backing disk size anyways.
+		 */
+		drbd_reconsider_max_bio_size(device, NULL);
+		drbd_set_my_capacity(device, p_csize ?: p_usize ?: p_size);
 	}
 
 	if (get_ldev(device)) {
@@ -4501,6 +4604,7 @@
 		struct data_cmd *cmd;
 
 		drbd_thread_current_set_cpu(&connection->receiver);
+		update_receiver_timing_details(connection, drbd_recv_header);
 		if (drbd_recv_header(connection, &pi))
 			goto err_out;
 
@@ -4519,12 +4623,14 @@
 		}
 
 		if (shs) {
+			update_receiver_timing_details(connection, drbd_recv_all_warn);
 			err = drbd_recv_all_warn(connection, pi.data, shs);
 			if (err)
 				goto err_out;
 			pi.size -= shs;
 		}
 
+		update_receiver_timing_details(connection, cmd->fn);
 		err = cmd->fn(connection, &pi);
 		if (err) {
 			drbd_err(connection, "error receiving %s, e: %d l: %d!\n",
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 09803d0..c67717d 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -52,7 +52,7 @@
 static void _drbd_end_io_acct(struct drbd_device *device, struct drbd_request *req)
 {
 	int rw = bio_data_dir(req->master_bio);
-	unsigned long duration = jiffies - req->start_time;
+	unsigned long duration = jiffies - req->start_jif;
 	int cpu;
 	cpu = part_stat_lock();
 	part_stat_add(cpu, &device->vdisk->part0, ticks[rw], duration);
@@ -66,7 +66,7 @@
 {
 	struct drbd_request *req;
 
-	req = mempool_alloc(drbd_request_mempool, GFP_NOIO);
+	req = mempool_alloc(drbd_request_mempool, GFP_NOIO | __GFP_ZERO);
 	if (!req)
 		return NULL;
 
@@ -84,6 +84,8 @@
 
 	INIT_LIST_HEAD(&req->tl_requests);
 	INIT_LIST_HEAD(&req->w.list);
+	INIT_LIST_HEAD(&req->req_pending_master_completion);
+	INIT_LIST_HEAD(&req->req_pending_local);
 
 	/* one reference to be put by __drbd_make_request */
 	atomic_set(&req->completion_ref, 1);
@@ -92,6 +94,19 @@
 	return req;
 }
 
+static void drbd_remove_request_interval(struct rb_root *root,
+					 struct drbd_request *req)
+{
+	struct drbd_device *device = req->device;
+	struct drbd_interval *i = &req->i;
+
+	drbd_remove_interval(root, i);
+
+	/* Wake up any processes waiting for this request to complete.  */
+	if (i->waiting)
+		wake_up(&device->misc_wait);
+}
+
 void drbd_req_destroy(struct kref *kref)
 {
 	struct drbd_request *req = container_of(kref, struct drbd_request, kref);
@@ -107,14 +122,30 @@
 		return;
 	}
 
-	/* remove it from the transfer log.
-	 * well, only if it had been there in the first
-	 * place... if it had not (local only or conflicting
-	 * and never sent), it should still be "empty" as
-	 * initialized in drbd_req_new(), so we can list_del() it
-	 * here unconditionally */
+	/* If called from mod_rq_state (expected normal case) or
+	 * drbd_send_and_submit (the less likely normal path), this holds the
+	 * req_lock, and req->tl_requests will typicaly be on ->transfer_log,
+	 * though it may be still empty (never added to the transfer log).
+	 *
+	 * If called from do_retry(), we do NOT hold the req_lock, but we are
+	 * still allowed to unconditionally list_del(&req->tl_requests),
+	 * because it will be on a local on-stack list only. */
 	list_del_init(&req->tl_requests);
 
+	/* finally remove the request from the conflict detection
+	 * respective block_id verification interval tree. */
+	if (!drbd_interval_empty(&req->i)) {
+		struct rb_root *root;
+
+		if (s & RQ_WRITE)
+			root = &device->write_requests;
+		else
+			root = &device->read_requests;
+		drbd_remove_request_interval(root, req);
+	} else if (s & (RQ_NET_MASK & ~RQ_NET_DONE) && req->i.size != 0)
+		drbd_err(device, "drbd_req_destroy: Logic BUG: interval empty, but: rq_state=0x%x, sect=%llu, size=%u\n",
+			s, (unsigned long long)req->i.sector, req->i.size);
+
 	/* if it was a write, we may have to set the corresponding
 	 * bit(s) out-of-sync first. If it had a local part, we need to
 	 * release the reference to the activity log. */
@@ -188,19 +219,6 @@
 }
 
 
-static void drbd_remove_request_interval(struct rb_root *root,
-					 struct drbd_request *req)
-{
-	struct drbd_device *device = req->device;
-	struct drbd_interval *i = &req->i;
-
-	drbd_remove_interval(root, i);
-
-	/* Wake up any processes waiting for this request to complete.  */
-	if (i->waiting)
-		wake_up(&device->misc_wait);
-}
-
 /* Helper for __req_mod().
  * Set m->bio to the master bio, if it is fit to be completed,
  * or leave it alone (it is initialized to NULL in __req_mod),
@@ -254,18 +272,6 @@
 	ok = (s & RQ_LOCAL_OK) || (s & RQ_NET_OK);
 	error = PTR_ERR(req->private_bio);
 
-	/* remove the request from the conflict detection
-	 * respective block_id verification hash */
-	if (!drbd_interval_empty(&req->i)) {
-		struct rb_root *root;
-
-		if (rw == WRITE)
-			root = &device->write_requests;
-		else
-			root = &device->read_requests;
-		drbd_remove_request_interval(root, req);
-	}
-
 	/* Before we can signal completion to the upper layers,
 	 * we may need to close the current transfer log epoch.
 	 * We are within the request lock, so we can simply compare
@@ -301,9 +307,24 @@
 		m->error = ok ? 0 : (error ?: -EIO);
 		m->bio = req->master_bio;
 		req->master_bio = NULL;
+		/* We leave it in the tree, to be able to verify later
+		 * write-acks in protocol != C during resync.
+		 * But we mark it as "complete", so it won't be counted as
+		 * conflict in a multi-primary setup. */
+		req->i.completed = true;
 	}
+
+	if (req->i.waiting)
+		wake_up(&device->misc_wait);
+
+	/* Either we are about to complete to upper layers,
+	 * or we will restart this request.
+	 * In either case, the request object will be destroyed soon,
+	 * so better remove it from all lists. */
+	list_del_init(&req->req_pending_master_completion);
 }
 
+/* still holds resource->req_lock */
 static int drbd_req_put_completion_ref(struct drbd_request *req, struct bio_and_error *m, int put)
 {
 	struct drbd_device *device = req->device;
@@ -324,12 +345,91 @@
 	return 1;
 }
 
+static void set_if_null_req_next(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_next == NULL)
+		connection->req_next = req;
+}
+
+static void advance_conn_req_next(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_next != req)
+		return;
+	list_for_each_entry_continue(req, &connection->transfer_log, tl_requests) {
+		const unsigned s = req->rq_state;
+		if (s & RQ_NET_QUEUED)
+			break;
+	}
+	if (&req->tl_requests == &connection->transfer_log)
+		req = NULL;
+	connection->req_next = req;
+}
+
+static void set_if_null_req_ack_pending(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_ack_pending == NULL)
+		connection->req_ack_pending = req;
+}
+
+static void advance_conn_req_ack_pending(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_ack_pending != req)
+		return;
+	list_for_each_entry_continue(req, &connection->transfer_log, tl_requests) {
+		const unsigned s = req->rq_state;
+		if ((s & RQ_NET_SENT) && (s & RQ_NET_PENDING))
+			break;
+	}
+	if (&req->tl_requests == &connection->transfer_log)
+		req = NULL;
+	connection->req_ack_pending = req;
+}
+
+static void set_if_null_req_not_net_done(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_not_net_done == NULL)
+		connection->req_not_net_done = req;
+}
+
+static void advance_conn_req_not_net_done(struct drbd_peer_device *peer_device, struct drbd_request *req)
+{
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
+	if (!connection)
+		return;
+	if (connection->req_not_net_done != req)
+		return;
+	list_for_each_entry_continue(req, &connection->transfer_log, tl_requests) {
+		const unsigned s = req->rq_state;
+		if ((s & RQ_NET_SENT) && !(s & RQ_NET_DONE))
+			break;
+	}
+	if (&req->tl_requests == &connection->transfer_log)
+		req = NULL;
+	connection->req_not_net_done = req;
+}
+
 /* I'd like this to be the only place that manipulates
  * req->completion_ref and req->kref. */
 static void mod_rq_state(struct drbd_request *req, struct bio_and_error *m,
 		int clear, int set)
 {
 	struct drbd_device *device = req->device;
+	struct drbd_peer_device *peer_device = first_peer_device(device);
 	unsigned s = req->rq_state;
 	int c_put = 0;
 	int k_put = 0;
@@ -356,14 +456,23 @@
 		atomic_inc(&req->completion_ref);
 	}
 
-	if (!(s & RQ_NET_QUEUED) && (set & RQ_NET_QUEUED))
+	if (!(s & RQ_NET_QUEUED) && (set & RQ_NET_QUEUED)) {
 		atomic_inc(&req->completion_ref);
+		set_if_null_req_next(peer_device, req);
+	}
 
 	if (!(s & RQ_EXP_BARR_ACK) && (set & RQ_EXP_BARR_ACK))
 		kref_get(&req->kref); /* wait for the DONE */
 
-	if (!(s & RQ_NET_SENT) && (set & RQ_NET_SENT))
-		atomic_add(req->i.size >> 9, &device->ap_in_flight);
+	if (!(s & RQ_NET_SENT) && (set & RQ_NET_SENT)) {
+		/* potentially already completed in the asender thread */
+		if (!(s & RQ_NET_DONE)) {
+			atomic_add(req->i.size >> 9, &device->ap_in_flight);
+			set_if_null_req_not_net_done(peer_device, req);
+		}
+		if (s & RQ_NET_PENDING)
+			set_if_null_req_ack_pending(peer_device, req);
+	}
 
 	if (!(s & RQ_COMPLETION_SUSP) && (set & RQ_COMPLETION_SUSP))
 		atomic_inc(&req->completion_ref);
@@ -386,20 +495,34 @@
 			++k_put;
 		else
 			++c_put;
+		list_del_init(&req->req_pending_local);
 	}
 
 	if ((s & RQ_NET_PENDING) && (clear & RQ_NET_PENDING)) {
 		dec_ap_pending(device);
 		++c_put;
+		req->acked_jif = jiffies;
+		advance_conn_req_ack_pending(peer_device, req);
 	}
 
-	if ((s & RQ_NET_QUEUED) && (clear & RQ_NET_QUEUED))
+	if ((s & RQ_NET_QUEUED) && (clear & RQ_NET_QUEUED)) {
 		++c_put;
+		advance_conn_req_next(peer_device, req);
+	}
 
-	if ((s & RQ_EXP_BARR_ACK) && !(s & RQ_NET_DONE) && (set & RQ_NET_DONE)) {
-		if (req->rq_state & RQ_NET_SENT)
+	if (!(s & RQ_NET_DONE) && (set & RQ_NET_DONE)) {
+		if (s & RQ_NET_SENT)
 			atomic_sub(req->i.size >> 9, &device->ap_in_flight);
-		++k_put;
+		if (s & RQ_EXP_BARR_ACK)
+			++k_put;
+		req->net_done_jif = jiffies;
+
+		/* in ahead/behind mode, or just in case,
+		 * before we finally destroy this request,
+		 * the caching pointers must not reference it anymore */
+		advance_conn_req_next(peer_device, req);
+		advance_conn_req_ack_pending(peer_device, req);
+		advance_conn_req_not_net_done(peer_device, req);
 	}
 
 	/* potentially complete and destroy */
@@ -439,6 +562,19 @@
 			bdevname(device->ldev->backing_bdev, b));
 }
 
+/* Helper for HANDED_OVER_TO_NETWORK.
+ * Is this a protocol A write (neither WRITE_ACK nor RECEIVE_ACK expected)?
+ * Is it also still "PENDING"?
+ * --> If so, clear PENDING and set NET_OK below.
+ * If it is a protocol A write, but not RQ_PENDING anymore, neg-ack was faster
+ * (and we must not set RQ_NET_OK) */
+static inline bool is_pending_write_protocol_A(struct drbd_request *req)
+{
+	return (req->rq_state &
+		   (RQ_WRITE|RQ_NET_PENDING|RQ_EXP_WRITE_ACK|RQ_EXP_RECEIVE_ACK))
+		== (RQ_WRITE|RQ_NET_PENDING);
+}
+
 /* obviously this could be coded as many single functions
  * instead of one huge switch,
  * or by putting the code directly in the respective locations
@@ -454,7 +590,9 @@
 int __req_mod(struct drbd_request *req, enum drbd_req_event what,
 		struct bio_and_error *m)
 {
-	struct drbd_device *device = req->device;
+	struct drbd_device *const device = req->device;
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
 	struct net_conf *nc;
 	int p, rv = 0;
 
@@ -477,7 +615,7 @@
 		 * and from w_read_retry_remote */
 		D_ASSERT(device, !(req->rq_state & RQ_NET_MASK));
 		rcu_read_lock();
-		nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
+		nc = rcu_dereference(connection->net_conf);
 		p = nc->wire_protocol;
 		rcu_read_unlock();
 		req->rq_state |=
@@ -549,7 +687,7 @@
 		D_ASSERT(device, (req->rq_state & RQ_LOCAL_MASK) == 0);
 		mod_rq_state(req, m, 0, RQ_NET_QUEUED);
 		req->w.cb = w_send_read_req;
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+		drbd_queue_work(&connection->sender_work,
 				&req->w);
 		break;
 
@@ -585,23 +723,23 @@
 		D_ASSERT(device, req->rq_state & RQ_NET_PENDING);
 		mod_rq_state(req, m, 0, RQ_NET_QUEUED|RQ_EXP_BARR_ACK);
 		req->w.cb =  w_send_dblock;
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+		drbd_queue_work(&connection->sender_work,
 				&req->w);
 
 		/* close the epoch, in case it outgrew the limit */
 		rcu_read_lock();
-		nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
+		nc = rcu_dereference(connection->net_conf);
 		p = nc->max_epoch_size;
 		rcu_read_unlock();
-		if (first_peer_device(device)->connection->current_tle_writes >= p)
-			start_new_tl_epoch(first_peer_device(device)->connection);
+		if (connection->current_tle_writes >= p)
+			start_new_tl_epoch(connection);
 
 		break;
 
 	case QUEUE_FOR_SEND_OOS:
 		mod_rq_state(req, m, 0, RQ_NET_QUEUED);
 		req->w.cb =  w_send_out_of_sync;
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+		drbd_queue_work(&connection->sender_work,
 				&req->w);
 		break;
 
@@ -615,18 +753,16 @@
 
 	case HANDED_OVER_TO_NETWORK:
 		/* assert something? */
-		if (bio_data_dir(req->master_bio) == WRITE &&
-		    !(req->rq_state & (RQ_EXP_RECEIVE_ACK | RQ_EXP_WRITE_ACK))) {
+		if (is_pending_write_protocol_A(req))
 			/* this is what is dangerous about protocol A:
 			 * pretend it was successfully written on the peer. */
-			if (req->rq_state & RQ_NET_PENDING)
-				mod_rq_state(req, m, RQ_NET_PENDING, RQ_NET_OK);
-			/* else: neg-ack was faster... */
-			/* it is still not yet RQ_NET_DONE until the
-			 * corresponding epoch barrier got acked as well,
-			 * so we know what to dirty on connection loss */
-		}
-		mod_rq_state(req, m, RQ_NET_QUEUED, RQ_NET_SENT);
+			mod_rq_state(req, m, RQ_NET_QUEUED|RQ_NET_PENDING,
+						RQ_NET_SENT|RQ_NET_OK);
+		else
+			mod_rq_state(req, m, RQ_NET_QUEUED, RQ_NET_SENT);
+		/* It is still not yet RQ_NET_DONE until the
+		 * corresponding epoch barrier got acked as well,
+		 * so we know what to dirty on connection loss. */
 		break;
 
 	case OOS_HANDED_TO_NETWORK:
@@ -658,12 +794,13 @@
 	case WRITE_ACKED_BY_PEER_AND_SIS:
 		req->rq_state |= RQ_NET_SIS;
 	case WRITE_ACKED_BY_PEER:
-		D_ASSERT(device, req->rq_state & RQ_EXP_WRITE_ACK);
-		/* protocol C; successfully written on peer.
+		/* Normal operation protocol C: successfully written on peer.
+		 * During resync, even in protocol != C,
+		 * we requested an explicit write ack anyways.
+		 * Which means we cannot even assert anything here.
 		 * Nothing more to do here.
 		 * We want to keep the tl in place for all protocols, to cater
 		 * for volatile write-back caches on lower level devices. */
-
 		goto ack_common;
 	case RECV_ACKED_BY_PEER:
 		D_ASSERT(device, req->rq_state & RQ_EXP_RECEIVE_ACK);
@@ -671,7 +808,6 @@
 		 * see also notes above in HANDED_OVER_TO_NETWORK about
 		 * protocol != C */
 	ack_common:
-		D_ASSERT(device, req->rq_state & RQ_NET_PENDING);
 		mod_rq_state(req, m, RQ_NET_PENDING, RQ_NET_OK);
 		break;
 
@@ -714,7 +850,7 @@
 
 		get_ldev(device); /* always succeeds in this call path */
 		req->w.cb = w_restart_disk_io;
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+		drbd_queue_work(&connection->sender_work,
 				&req->w);
 		break;
 
@@ -736,7 +872,8 @@
 
 			mod_rq_state(req, m, RQ_COMPLETION_SUSP, RQ_NET_QUEUED|RQ_NET_PENDING);
 			if (req->w.cb) {
-				drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+				/* w.cb expected to be w_send_dblock, or w_send_read_req */
+				drbd_queue_work(&connection->sender_work,
 						&req->w);
 				rv = req->rq_state & RQ_WRITE ? MR_WRITE : MR_READ;
 			} /* else: FIXME can this happen? */
@@ -769,7 +906,7 @@
 		break;
 
 	case QUEUE_AS_DRBD_BARRIER:
-		start_new_tl_epoch(first_peer_device(device)->connection);
+		start_new_tl_epoch(connection);
 		mod_rq_state(req, m, 0, RQ_NET_OK|RQ_NET_DONE);
 		break;
 	};
@@ -886,6 +1023,9 @@
 	    connection->agreed_pro_version < 96)
 		return;
 
+	if (on_congestion == OC_PULL_AHEAD && device->state.conn == C_AHEAD)
+		return; /* nothing to do ... */
+
 	/* If I don't even have good local storage, we can not reasonably try
 	 * to pull ahead of the peer. We also need the local reference to make
 	 * sure device->act_log is there.
@@ -1021,6 +1161,7 @@
 	 * stable storage, and this is a WRITE, we may not even submit
 	 * this bio. */
 	if (get_ldev(device)) {
+		req->pre_submit_jif = jiffies;
 		if (drbd_insert_fault(device,
 				      rw == WRITE ? DRBD_FAULT_DT_WR
 				    : rw == READ  ? DRBD_FAULT_DT_RD
@@ -1035,10 +1176,14 @@
 
 static void drbd_queue_write(struct drbd_device *device, struct drbd_request *req)
 {
-	spin_lock(&device->submit.lock);
+	spin_lock_irq(&device->resource->req_lock);
 	list_add_tail(&req->tl_requests, &device->submit.writes);
-	spin_unlock(&device->submit.lock);
+	list_add_tail(&req->req_pending_master_completion,
+			&device->pending_master_completion[1 /* WRITE */]);
+	spin_unlock_irq(&device->resource->req_lock);
 	queue_work(device->submit.wq, &device->submit.worker);
+	/* do_submit() may sleep internally on al_wait, too */
+	wake_up(&device->al_wait);
 }
 
 /* returns the new drbd_request pointer, if the caller is expected to
@@ -1047,7 +1192,7 @@
  * Returns ERR_PTR(-ENOMEM) if we cannot allocate a drbd_request.
  */
 static struct drbd_request *
-drbd_request_prepare(struct drbd_device *device, struct bio *bio, unsigned long start_time)
+drbd_request_prepare(struct drbd_device *device, struct bio *bio, unsigned long start_jif)
 {
 	const int rw = bio_data_dir(bio);
 	struct drbd_request *req;
@@ -1062,7 +1207,7 @@
 		bio_endio(bio, -ENOMEM);
 		return ERR_PTR(-ENOMEM);
 	}
-	req->start_time = start_time;
+	req->start_jif = start_jif;
 
 	if (!get_ldev(device)) {
 		bio_put(req->private_bio);
@@ -1075,10 +1220,12 @@
 	if (rw == WRITE && req->private_bio && req->i.size
 	&& !test_bit(AL_SUSPENDED, &device->flags)) {
 		if (!drbd_al_begin_io_fastpath(device, &req->i)) {
+			atomic_inc(&device->ap_actlog_cnt);
 			drbd_queue_write(device, req);
 			return NULL;
 		}
 		req->rq_state |= RQ_IN_ACT_LOG;
+		req->in_actlog_jif = jiffies;
 	}
 
 	return req;
@@ -1086,11 +1233,13 @@
 
 static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request *req)
 {
+	struct drbd_resource *resource = device->resource;
 	const int rw = bio_rw(req->master_bio);
 	struct bio_and_error m = { NULL, };
 	bool no_remote = false;
+	bool submit_private_bio = false;
 
-	spin_lock_irq(&device->resource->req_lock);
+	spin_lock_irq(&resource->req_lock);
 	if (rw == WRITE) {
 		/* This may temporarily give up the req_lock,
 		 * but will re-aquire it before it returns here.
@@ -1148,13 +1297,18 @@
 			no_remote = true;
 	}
 
+	/* If it took the fast path in drbd_request_prepare, add it here.
+	 * The slow path has added it already. */
+	if (list_empty(&req->req_pending_master_completion))
+		list_add_tail(&req->req_pending_master_completion,
+			&device->pending_master_completion[rw == WRITE]);
 	if (req->private_bio) {
 		/* needs to be marked within the same spinlock */
+		list_add_tail(&req->req_pending_local,
+			&device->pending_completion[rw == WRITE]);
 		_req_mod(req, TO_BE_SUBMITTED);
 		/* but we need to give up the spinlock to submit */
-		spin_unlock_irq(&device->resource->req_lock);
-		drbd_submit_req_private_bio(req);
-		spin_lock_irq(&device->resource->req_lock);
+		submit_private_bio = true;
 	} else if (no_remote) {
 nodata:
 		if (__ratelimit(&drbd_ratelimit_state))
@@ -1167,15 +1321,23 @@
 out:
 	if (drbd_req_put_completion_ref(req, &m, 1))
 		kref_put(&req->kref, drbd_req_destroy);
-	spin_unlock_irq(&device->resource->req_lock);
+	spin_unlock_irq(&resource->req_lock);
 
+	/* Even though above is a kref_put(), this is safe.
+	 * As long as we still need to submit our private bio,
+	 * we hold a completion ref, and the request cannot disappear.
+	 * If however this request did not even have a private bio to submit
+	 * (e.g. remote read), req may already be invalid now.
+	 * That's why we cannot check on req->private_bio. */
+	if (submit_private_bio)
+		drbd_submit_req_private_bio(req);
 	if (m.bio)
 		complete_master_bio(device, &m);
 }
 
-void __drbd_make_request(struct drbd_device *device, struct bio *bio, unsigned long start_time)
+void __drbd_make_request(struct drbd_device *device, struct bio *bio, unsigned long start_jif)
 {
-	struct drbd_request *req = drbd_request_prepare(device, bio, start_time);
+	struct drbd_request *req = drbd_request_prepare(device, bio, start_jif);
 	if (IS_ERR_OR_NULL(req))
 		return;
 	drbd_send_and_submit(device, req);
@@ -1194,6 +1356,8 @@
 				continue;
 
 			req->rq_state |= RQ_IN_ACT_LOG;
+			req->in_actlog_jif = jiffies;
+			atomic_dec(&device->ap_actlog_cnt);
 		}
 
 		list_del_init(&req->tl_requests);
@@ -1203,7 +1367,8 @@
 
 static bool prepare_al_transaction_nonblock(struct drbd_device *device,
 					    struct list_head *incoming,
-					    struct list_head *pending)
+					    struct list_head *pending,
+					    struct list_head *later)
 {
 	struct drbd_request *req, *tmp;
 	int wake = 0;
@@ -1212,45 +1377,105 @@
 	spin_lock_irq(&device->al_lock);
 	list_for_each_entry_safe(req, tmp, incoming, tl_requests) {
 		err = drbd_al_begin_io_nonblock(device, &req->i);
+		if (err == -ENOBUFS)
+			break;
 		if (err == -EBUSY)
 			wake = 1;
 		if (err)
-			continue;
-		req->rq_state |= RQ_IN_ACT_LOG;
-		list_move_tail(&req->tl_requests, pending);
+			list_move_tail(&req->tl_requests, later);
+		else
+			list_move_tail(&req->tl_requests, pending);
 	}
 	spin_unlock_irq(&device->al_lock);
 	if (wake)
 		wake_up(&device->al_wait);
-
 	return !list_empty(pending);
 }
 
+void send_and_submit_pending(struct drbd_device *device, struct list_head *pending)
+{
+	struct drbd_request *req, *tmp;
+
+	list_for_each_entry_safe(req, tmp, pending, tl_requests) {
+		req->rq_state |= RQ_IN_ACT_LOG;
+		req->in_actlog_jif = jiffies;
+		atomic_dec(&device->ap_actlog_cnt);
+		list_del_init(&req->tl_requests);
+		drbd_send_and_submit(device, req);
+	}
+}
+
 void do_submit(struct work_struct *ws)
 {
 	struct drbd_device *device = container_of(ws, struct drbd_device, submit.worker);
-	LIST_HEAD(incoming);
-	LIST_HEAD(pending);
-	struct drbd_request *req, *tmp;
+	LIST_HEAD(incoming);	/* from drbd_make_request() */
+	LIST_HEAD(pending);	/* to be submitted after next AL-transaction commit */
+	LIST_HEAD(busy);	/* blocked by resync requests */
+
+	/* grab new incoming requests */
+	spin_lock_irq(&device->resource->req_lock);
+	list_splice_tail_init(&device->submit.writes, &incoming);
+	spin_unlock_irq(&device->resource->req_lock);
 
 	for (;;) {
-		spin_lock(&device->submit.lock);
-		list_splice_tail_init(&device->submit.writes, &incoming);
-		spin_unlock(&device->submit.lock);
+		DEFINE_WAIT(wait);
 
+		/* move used-to-be-busy back to front of incoming */
+		list_splice_init(&busy, &incoming);
 		submit_fast_path(device, &incoming);
 		if (list_empty(&incoming))
 			break;
 
-skip_fast_path:
-		wait_event(device->al_wait, prepare_al_transaction_nonblock(device, &incoming, &pending));
-		/* Maybe more was queued, while we prepared the transaction?
-		 * Try to stuff them into this transaction as well.
-		 * Be strictly non-blocking here, no wait_event, we already
-		 * have something to commit.
-		 * Stop if we don't make any more progres.
-		 */
 		for (;;) {
+			prepare_to_wait(&device->al_wait, &wait, TASK_UNINTERRUPTIBLE);
+
+			list_splice_init(&busy, &incoming);
+			prepare_al_transaction_nonblock(device, &incoming, &pending, &busy);
+			if (!list_empty(&pending))
+				break;
+
+			schedule();
+
+			/* If all currently "hot" activity log extents are kept busy by
+			 * incoming requests, we still must not totally starve new
+			 * requests to "cold" extents.
+			 * Something left on &incoming means there had not been
+			 * enough update slots available, and the activity log
+			 * has been marked as "starving".
+			 *
+			 * Try again now, without looking for new requests,
+			 * effectively blocking all new requests until we made
+			 * at least _some_ progress with what we currently have.
+			 */
+			if (!list_empty(&incoming))
+				continue;
+
+			/* Nothing moved to pending, but nothing left
+			 * on incoming: all moved to busy!
+			 * Grab new and iterate. */
+			spin_lock_irq(&device->resource->req_lock);
+			list_splice_tail_init(&device->submit.writes, &incoming);
+			spin_unlock_irq(&device->resource->req_lock);
+		}
+		finish_wait(&device->al_wait, &wait);
+
+		/* If the transaction was full, before all incoming requests
+		 * had been processed, skip ahead to commit, and iterate
+		 * without splicing in more incoming requests from upper layers.
+		 *
+		 * Else, if all incoming have been processed,
+		 * they have become either "pending" (to be submitted after
+		 * next transaction commit) or "busy" (blocked by resync).
+		 *
+		 * Maybe more was queued, while we prepared the transaction?
+		 * Try to stuff those into this transaction as well.
+		 * Be strictly non-blocking here,
+		 * we already have something to commit.
+		 *
+		 * Commit if we don't make any more progres.
+		 */
+
+		while (list_empty(&incoming)) {
 			LIST_HEAD(more_pending);
 			LIST_HEAD(more_incoming);
 			bool made_progress;
@@ -1260,55 +1485,32 @@
 			if (list_empty(&device->submit.writes))
 				break;
 
-			spin_lock(&device->submit.lock);
+			spin_lock_irq(&device->resource->req_lock);
 			list_splice_tail_init(&device->submit.writes, &more_incoming);
-			spin_unlock(&device->submit.lock);
+			spin_unlock_irq(&device->resource->req_lock);
 
 			if (list_empty(&more_incoming))
 				break;
 
-			made_progress = prepare_al_transaction_nonblock(device, &more_incoming, &more_pending);
+			made_progress = prepare_al_transaction_nonblock(device, &more_incoming, &more_pending, &busy);
 
 			list_splice_tail_init(&more_pending, &pending);
 			list_splice_tail_init(&more_incoming, &incoming);
-
 			if (!made_progress)
 				break;
 		}
-		drbd_al_begin_io_commit(device, false);
 
-		list_for_each_entry_safe(req, tmp, &pending, tl_requests) {
-			list_del_init(&req->tl_requests);
-			drbd_send_and_submit(device, req);
-		}
-
-		/* If all currently hot activity log extents are kept busy by
-		 * incoming requests, we still must not totally starve new
-		 * requests to cold extents. In that case, prepare one request
-		 * in blocking mode. */
-		list_for_each_entry_safe(req, tmp, &incoming, tl_requests) {
-			list_del_init(&req->tl_requests);
-			req->rq_state |= RQ_IN_ACT_LOG;
-			if (!drbd_al_begin_io_prepare(device, &req->i)) {
-				/* Corresponding extent was hot after all? */
-				drbd_send_and_submit(device, req);
-			} else {
-				/* Found a request to a cold extent.
-				 * Put on "pending" list,
-				 * and try to cumulate with more. */
-				list_add(&req->tl_requests, &pending);
-				goto skip_fast_path;
-			}
-		}
+		drbd_al_begin_io_commit(device);
+		send_and_submit_pending(device, &pending);
 	}
 }
 
 void drbd_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct drbd_device *device = (struct drbd_device *) q->queuedata;
-	unsigned long start_time;
+	unsigned long start_jif;
 
-	start_time = jiffies;
+	start_jif = jiffies;
 
 	/*
 	 * what we "blindly" assume:
@@ -1316,7 +1518,7 @@
 	D_ASSERT(device, IS_ALIGNED(bio->bi_iter.bi_size, 512));
 
 	inc_ap_bio(device);
-	__drbd_make_request(device, bio, start_time);
+	__drbd_make_request(device, bio, start_jif);
 }
 
 /* This is called by bio_add_page().
@@ -1353,36 +1555,13 @@
 	return limit;
 }
 
-static void find_oldest_requests(
-		struct drbd_connection *connection,
-		struct drbd_device *device,
-		struct drbd_request **oldest_req_waiting_for_peer,
-		struct drbd_request **oldest_req_waiting_for_disk)
-{
-	struct drbd_request *r;
-	*oldest_req_waiting_for_peer = NULL;
-	*oldest_req_waiting_for_disk = NULL;
-	list_for_each_entry(r, &connection->transfer_log, tl_requests) {
-		const unsigned s = r->rq_state;
-		if (!*oldest_req_waiting_for_peer
-		&& ((s & RQ_NET_MASK) && !(s & RQ_NET_DONE)))
-			*oldest_req_waiting_for_peer = r;
-
-		if (!*oldest_req_waiting_for_disk
-		&& (s & RQ_LOCAL_PENDING) && r->device == device)
-			*oldest_req_waiting_for_disk = r;
-
-		if (*oldest_req_waiting_for_peer && *oldest_req_waiting_for_disk)
-			break;
-	}
-}
-
 void request_timer_fn(unsigned long data)
 {
 	struct drbd_device *device = (struct drbd_device *) data;
 	struct drbd_connection *connection = first_peer_device(device)->connection;
-	struct drbd_request *req_disk, *req_peer; /* oldest request */
+	struct drbd_request *req_read, *req_write, *req_peer; /* oldest request */
 	struct net_conf *nc;
+	unsigned long oldest_submit_jif;
 	unsigned long ent = 0, dt = 0, et, nt; /* effective timeout = ko_count * timeout */
 	unsigned long now;
 
@@ -1403,14 +1582,31 @@
 		return; /* Recurring timer stopped */
 
 	now = jiffies;
+	nt = now + et;
 
 	spin_lock_irq(&device->resource->req_lock);
-	find_oldest_requests(connection, device, &req_peer, &req_disk);
-	if (req_peer == NULL && req_disk == NULL) {
-		spin_unlock_irq(&device->resource->req_lock);
-		mod_timer(&device->request_timer, now + et);
-		return;
-	}
+	req_read = list_first_entry_or_null(&device->pending_completion[0], struct drbd_request, req_pending_local);
+	req_write = list_first_entry_or_null(&device->pending_completion[1], struct drbd_request, req_pending_local);
+	req_peer = connection->req_not_net_done;
+	/* maybe the oldest request waiting for the peer is in fact still
+	 * blocking in tcp sendmsg */
+	if (!req_peer && connection->req_next && connection->req_next->pre_send_jif)
+		req_peer = connection->req_next;
+
+	/* evaluate the oldest peer request only in one timer! */
+	if (req_peer && req_peer->device != device)
+		req_peer = NULL;
+
+	/* do we have something to evaluate? */
+	if (req_peer == NULL && req_write == NULL && req_read == NULL)
+		goto out;
+
+	oldest_submit_jif =
+		(req_write && req_read)
+		? ( time_before(req_write->pre_submit_jif, req_read->pre_submit_jif)
+		  ? req_write->pre_submit_jif : req_read->pre_submit_jif )
+		: req_write ? req_write->pre_submit_jif
+		: req_read ? req_read->pre_submit_jif : now;
 
 	/* The request is considered timed out, if
 	 * - we have some effective timeout from the configuration,
@@ -1429,13 +1625,13 @@
 	 * to expire twice (worst case) to become effective. Good enough.
 	 */
 	if (ent && req_peer &&
-		 time_after(now, req_peer->start_time + ent) &&
+		 time_after(now, req_peer->pre_send_jif + ent) &&
 		!time_in_range(now, connection->last_reconnect_jif, connection->last_reconnect_jif + ent)) {
 		drbd_warn(device, "Remote failed to finish a request within ko-count * timeout\n");
 		_drbd_set_state(_NS(device, conn, C_TIMEOUT), CS_VERBOSE | CS_HARD, NULL);
 	}
-	if (dt && req_disk &&
-		 time_after(now, req_disk->start_time + dt) &&
+	if (dt && oldest_submit_jif != now &&
+		 time_after(now, oldest_submit_jif + dt) &&
 		!time_in_range(now, device->last_reattach_jif, device->last_reattach_jif + dt)) {
 		drbd_warn(device, "Local backing device failed to meet the disk-timeout\n");
 		__drbd_chk_io_error(device, DRBD_FORCE_DETACH);
@@ -1443,11 +1639,12 @@
 
 	/* Reschedule timer for the nearest not already expired timeout.
 	 * Fallback to now + min(effective network timeout, disk timeout). */
-	ent = (ent && req_peer && time_before(now, req_peer->start_time + ent))
-		? req_peer->start_time + ent : now + et;
-	dt = (dt && req_disk && time_before(now, req_disk->start_time + dt))
-		? req_disk->start_time + dt : now + et;
+	ent = (ent && req_peer && time_before(now, req_peer->pre_send_jif + ent))
+		? req_peer->pre_send_jif + ent : now + et;
+	dt = (dt && oldest_submit_jif != now && time_before(now, oldest_submit_jif + dt))
+		? oldest_submit_jif + dt : now + et;
 	nt = time_before(ent, dt) ? ent : dt;
+out:
 	spin_unlock_irq(&connection->resource->req_lock);
 	mod_timer(&device->request_timer, nt);
 }
diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h
index 8566cd5..9f6a040 100644
--- a/drivers/block/drbd/drbd_req.h
+++ b/drivers/block/drbd/drbd_req.h
@@ -288,6 +288,7 @@
 extern void request_timer_fn(unsigned long data);
 extern void tl_restart(struct drbd_connection *connection, enum drbd_req_event what);
 extern void _tl_restart(struct drbd_connection *connection, enum drbd_req_event what);
+extern void tl_abort_disk_io(struct drbd_device *device);
 
 /* this is in drbd_main.c */
 extern void drbd_restart_request(struct drbd_request *req);
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index a5d8aae..c35c0f0 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -410,7 +410,7 @@
 	return rv;
 }
 
-static void print_st(struct drbd_device *device, char *name, union drbd_state ns)
+static void print_st(struct drbd_device *device, const char *name, union drbd_state ns)
 {
 	drbd_err(device, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n",
 	    name,
@@ -952,11 +952,12 @@
 __drbd_set_state(struct drbd_device *device, union drbd_state ns,
 	         enum chg_state_flags flags, struct completion *done)
 {
+	struct drbd_peer_device *peer_device = first_peer_device(device);
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
 	union drbd_state os;
 	enum drbd_state_rv rv = SS_SUCCESS;
 	enum sanitize_state_warnings ssw;
 	struct after_state_chg_work *ascw;
-	bool did_remote, should_do_remote;
 
 	os = drbd_read_state(device);
 
@@ -978,9 +979,9 @@
 			   this happen...*/
 
 			if (is_valid_state(device, os) == rv)
-				rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
+				rv = is_valid_soft_transition(os, ns, connection);
 		} else
-			rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
+			rv = is_valid_soft_transition(os, ns, connection);
 	}
 
 	if (rv < SS_SUCCESS) {
@@ -997,7 +998,7 @@
 	   sanitize_state(). Only display it here if we where not called from
 	   _conn_request_state() */
 	if (!(flags & CS_DC_SUSP))
-		conn_pr_state_change(first_peer_device(device)->connection, os, ns,
+		conn_pr_state_change(connection, os, ns,
 				     (flags & ~CS_DC_MASK) | CS_DC_SUSP);
 
 	/* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference
@@ -1008,28 +1009,35 @@
 	    (os.disk != D_DISKLESS && ns.disk == D_DISKLESS))
 		atomic_inc(&device->local_cnt);
 
-	did_remote = drbd_should_do_remote(device->state);
+	if (!is_sync_state(os.conn) && is_sync_state(ns.conn))
+		clear_bit(RS_DONE, &device->flags);
+
+	/* changes to local_cnt and device flags should be visible before
+	 * changes to state, which again should be visible before anything else
+	 * depending on that change happens. */
+	smp_wmb();
 	device->state.i = ns.i;
-	should_do_remote = drbd_should_do_remote(device->state);
 	device->resource->susp = ns.susp;
 	device->resource->susp_nod = ns.susp_nod;
 	device->resource->susp_fen = ns.susp_fen;
+	smp_wmb();
 
 	/* put replicated vs not-replicated requests in seperate epochs */
-	if (did_remote != should_do_remote)
-		start_new_tl_epoch(first_peer_device(device)->connection);
+	if (drbd_should_do_remote((union drbd_dev_state)os.i) !=
+	    drbd_should_do_remote((union drbd_dev_state)ns.i))
+		start_new_tl_epoch(connection);
 
 	if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING)
 		drbd_print_uuids(device, "attached to UUIDs");
 
 	/* Wake up role changes, that were delayed because of connection establishing */
 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS &&
-	    no_peer_wf_report_params(first_peer_device(device)->connection))
-		clear_bit(STATE_SENT, &first_peer_device(device)->connection->flags);
+	    no_peer_wf_report_params(connection))
+		clear_bit(STATE_SENT, &connection->flags);
 
 	wake_up(&device->misc_wait);
 	wake_up(&device->state_wait);
-	wake_up(&first_peer_device(device)->connection->ping_wait);
+	wake_up(&connection->ping_wait);
 
 	/* Aborted verify run, or we reached the stop sector.
 	 * Log the last position, unless end-of-device. */
@@ -1118,21 +1126,21 @@
 
 	/* Receiver should clean up itself */
 	if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING)
-		drbd_thread_stop_nowait(&first_peer_device(device)->connection->receiver);
+		drbd_thread_stop_nowait(&connection->receiver);
 
 	/* Now the receiver finished cleaning up itself, it should die */
 	if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE)
-		drbd_thread_stop_nowait(&first_peer_device(device)->connection->receiver);
+		drbd_thread_stop_nowait(&connection->receiver);
 
 	/* Upon network failure, we need to restart the receiver. */
 	if (os.conn > C_WF_CONNECTION &&
 	    ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT)
-		drbd_thread_restart_nowait(&first_peer_device(device)->connection->receiver);
+		drbd_thread_restart_nowait(&connection->receiver);
 
 	/* Resume AL writing if we get a connection */
 	if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) {
 		drbd_resume_al(device);
-		first_peer_device(device)->connection->connect_cnt++;
+		connection->connect_cnt++;
 	}
 
 	/* remember last attach time so request_timer_fn() won't
@@ -1150,7 +1158,7 @@
 		ascw->w.cb = w_after_state_ch;
 		ascw->device = device;
 		ascw->done = done;
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
+		drbd_queue_work(&connection->sender_work,
 				&ascw->w);
 	} else {
 		drbd_err(device, "Could not kmalloc an ascw\n");
@@ -1222,13 +1230,16 @@
 			   union drbd_state ns, enum chg_state_flags flags)
 {
 	struct drbd_resource *resource = device->resource;
+	struct drbd_peer_device *peer_device = first_peer_device(device);
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
 	struct sib_info sib;
 
 	sib.sib_reason = SIB_STATE_CHANGE;
 	sib.os = os;
 	sib.ns = ns;
 
-	if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) {
+	if ((os.disk != D_UP_TO_DATE || os.pdsk != D_UP_TO_DATE)
+	&&  (ns.disk == D_UP_TO_DATE && ns.pdsk == D_UP_TO_DATE)) {
 		clear_bit(CRASHED_PRIMARY, &device->flags);
 		if (device->p_uuid)
 			device->p_uuid[UI_FLAGS] &= ~((u64)2);
@@ -1245,7 +1256,6 @@
 	   state change. This function might sleep */
 
 	if (ns.susp_nod) {
-		struct drbd_connection *connection = first_peer_device(device)->connection;
 		enum drbd_req_event what = NOTHING;
 
 		spin_lock_irq(&device->resource->req_lock);
@@ -1267,8 +1277,6 @@
 	}
 
 	if (ns.susp_fen) {
-		struct drbd_connection *connection = first_peer_device(device)->connection;
-
 		spin_lock_irq(&device->resource->req_lock);
 		if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
 			/* case2: The connection was established again: */
@@ -1294,8 +1302,8 @@
 	 * which is unexpected. */
 	if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) &&
 	    (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) &&
-	    first_peer_device(device)->connection->agreed_pro_version >= 96 && get_ldev(device)) {
-		drbd_gen_and_send_sync_uuid(first_peer_device(device));
+	    connection->agreed_pro_version >= 96 && get_ldev(device)) {
+		drbd_gen_and_send_sync_uuid(peer_device);
 		put_ldev(device);
 	}
 
@@ -1309,8 +1317,8 @@
 		atomic_set(&device->rs_pending_cnt, 0);
 		drbd_rs_cancel_all(device);
 
-		drbd_send_uuids(first_peer_device(device));
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_uuids(peer_device);
+		drbd_send_state(peer_device, ns);
 	}
 	/* No point in queuing send_bitmap if we don't have a connection
 	 * anymore, so check also the _current_ state, not only the new state
@@ -1335,7 +1343,7 @@
 					set_bit(NEW_CUR_UUID, &device->flags);
 				} else {
 					drbd_uuid_new_current(device);
-					drbd_send_uuids(first_peer_device(device));
+					drbd_send_uuids(peer_device);
 				}
 			}
 			put_ldev(device);
@@ -1346,7 +1354,7 @@
 		if (os.peer == R_SECONDARY && ns.peer == R_PRIMARY &&
 		    device->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
 			drbd_uuid_new_current(device);
-			drbd_send_uuids(first_peer_device(device));
+			drbd_send_uuids(peer_device);
 		}
 		/* D_DISKLESS Peer becomes secondary */
 		if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)
@@ -1373,16 +1381,16 @@
 	/* Last part of the attaching process ... */
 	if (ns.conn >= C_CONNECTED &&
 	    os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {
-		drbd_send_sizes(first_peer_device(device), 0, 0);  /* to start sync... */
-		drbd_send_uuids(first_peer_device(device));
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_sizes(peer_device, 0, 0);  /* to start sync... */
+		drbd_send_uuids(peer_device);
+		drbd_send_state(peer_device, ns);
 	}
 
 	/* We want to pause/continue resync, tell peer. */
 	if (ns.conn >= C_CONNECTED &&
 	     ((os.aftr_isp != ns.aftr_isp) ||
 	      (os.user_isp != ns.user_isp)))
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	/* In case one of the isp bits got set, suspend other devices. */
 	if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) &&
@@ -1392,10 +1400,10 @@
 	/* Make sure the peer gets informed about eventual state
 	   changes (ISP bits) while we were in WFReportParams. */
 	if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED)
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	if (os.conn != C_AHEAD && ns.conn == C_AHEAD)
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	/* We are in the progress to start a full sync... */
 	if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
@@ -1449,7 +1457,7 @@
 					drbd_disk_str(device->state.disk));
 
 			if (ns.conn >= C_CONNECTED)
-				drbd_send_state(first_peer_device(device), ns);
+				drbd_send_state(peer_device, ns);
 
 			drbd_rs_cancel_all(device);
 
@@ -1473,7 +1481,7 @@
 				 drbd_disk_str(device->state.disk));
 
 		if (ns.conn >= C_CONNECTED)
-			drbd_send_state(first_peer_device(device), ns);
+			drbd_send_state(peer_device, ns);
 		/* corresponding get_ldev in __drbd_set_state
 		 * this may finally trigger drbd_ldev_destroy. */
 		put_ldev(device);
@@ -1481,7 +1489,7 @@
 
 	/* Notify peer that I had a local IO error, and did not detached.. */
 	if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED)
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	/* Disks got bigger while they were detached */
 	if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING &&
@@ -1499,14 +1507,14 @@
 	/* sync target done with resync.  Explicitly notify peer, even though
 	 * it should (at least for non-empty resyncs) already know itself. */
 	if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED)
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	/* Verify finished, or reached stop sector.  Peer did not know about
 	 * the stop sector, and we may even have changed the stop sector during
 	 * verify to interrupt/stop early.  Send the new state. */
 	if (os.conn == C_VERIFY_S && ns.conn == C_CONNECTED
 	&& verify_can_do_stop_sector(device))
-		drbd_send_state(first_peer_device(device), ns);
+		drbd_send_state(peer_device, ns);
 
 	/* This triggers bitmap writeout of potentially still unwritten pages
 	 * if the resync finished cleanly, or aborted because of peer disk
@@ -1563,7 +1571,7 @@
 		old_conf = connection->net_conf;
 		connection->my_addr_len = 0;
 		connection->peer_addr_len = 0;
-		rcu_assign_pointer(connection->net_conf, NULL);
+		RCU_INIT_POINTER(connection->net_conf, NULL);
 		conn_free_crypto(connection);
 		mutex_unlock(&connection->resource->conf_update);
 
@@ -1599,7 +1607,7 @@
 	return 0;
 }
 
-void conn_old_common_state(struct drbd_connection *connection, union drbd_state *pcs, enum chg_state_flags *pf)
+static void conn_old_common_state(struct drbd_connection *connection, union drbd_state *pcs, enum chg_state_flags *pf)
 {
 	enum chg_state_flags flags = ~0;
 	struct drbd_peer_device *peer_device;
@@ -1688,7 +1696,7 @@
 	return rv;
 }
 
-void
+static void
 conn_set_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
 	       union drbd_state *pns_min, union drbd_state *pns_max, enum chg_state_flags flags)
 {
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index d8f57b6..50776b3 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -67,13 +67,10 @@
  */
 void drbd_md_io_complete(struct bio *bio, int error)
 {
-	struct drbd_md_io *md_io;
 	struct drbd_device *device;
 
-	md_io = (struct drbd_md_io *)bio->bi_private;
-	device = container_of(md_io, struct drbd_device, md_io);
-
-	md_io->error = error;
+	device = bio->bi_private;
+	device->md_io.error = error;
 
 	/* We grabbed an extra reference in _drbd_md_sync_page_io() to be able
 	 * to timeout on the lower level device, and eventually detach from it.
@@ -87,7 +84,7 @@
 	 * ASSERT(atomic_read(&device->md_io_in_use) == 1) there.
 	 */
 	drbd_md_put_buffer(device);
-	md_io->done = 1;
+	device->md_io.done = 1;
 	wake_up(&device->misc_wait);
 	bio_put(bio);
 	if (device->ldev) /* special case: drbd_md_read() during drbd_adm_attach() */
@@ -135,6 +132,7 @@
 	i = peer_req->i;
 	do_al_complete_io = peer_req->flags & EE_CALL_AL_COMPLETE_IO;
 	block_id = peer_req->block_id;
+	peer_req->flags &= ~EE_CALL_AL_COMPLETE_IO;
 
 	spin_lock_irqsave(&device->resource->req_lock, flags);
 	device->writ_cnt += peer_req->i.size >> 9;
@@ -398,9 +396,6 @@
 	if (!get_ldev(device))
 		return -EIO;
 
-	if (drbd_rs_should_slow_down(device, sector))
-		goto defer;
-
 	/* GFP_TRY, because if there is no memory available right now, this may
 	 * be rescheduled for later. It is "only" background resync, after all. */
 	peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER /* unused */, sector,
@@ -410,7 +405,7 @@
 
 	peer_req->w.cb = w_e_send_csum;
 	spin_lock_irq(&device->resource->req_lock);
-	list_add(&peer_req->w.list, &device->read_ee);
+	list_add_tail(&peer_req->w.list, &device->read_ee);
 	spin_unlock_irq(&device->resource->req_lock);
 
 	atomic_add(size >> 9, &device->rs_sect_ev);
@@ -452,9 +447,9 @@
 {
 	struct drbd_device *device = (struct drbd_device *) data;
 
-	if (list_empty(&device->resync_work.list))
-		drbd_queue_work(&first_peer_device(device)->connection->sender_work,
-				&device->resync_work);
+	drbd_queue_work_if_unqueued(
+		&first_peer_device(device)->connection->sender_work,
+		&device->resync_work);
 }
 
 static void fifo_set(struct fifo_buffer *fb, int value)
@@ -504,9 +499,9 @@
 static int drbd_rs_controller(struct drbd_device *device, unsigned int sect_in)
 {
 	struct disk_conf *dc;
-	unsigned int want;     /* The number of sectors we want in the proxy */
+	unsigned int want;     /* The number of sectors we want in-flight */
 	int req_sect; /* Number of sectors to request in this turn */
-	int correction; /* Number of sectors more we need in the proxy*/
+	int correction; /* Number of sectors more we need in-flight */
 	int cps; /* correction per invocation of drbd_rs_controller() */
 	int steps; /* Number of time steps to plan ahead */
 	int curr_corr;
@@ -577,20 +572,27 @@
 	 * potentially causing a distributed deadlock on congestion during
 	 * online-verify or (checksum-based) resync, if max-buffers,
 	 * socket buffer sizes and resync rate settings are mis-configured. */
-	if (mxb - device->rs_in_flight < number)
-		number = mxb - device->rs_in_flight;
+
+	/* note that "number" is in units of "BM_BLOCK_SIZE" (which is 4k),
+	 * mxb (as used here, and in drbd_alloc_pages on the peer) is
+	 * "number of pages" (typically also 4k),
+	 * but "rs_in_flight" is in "sectors" (512 Byte). */
+	if (mxb - device->rs_in_flight/8 < number)
+		number = mxb - device->rs_in_flight/8;
 
 	return number;
 }
 
-static int make_resync_request(struct drbd_device *device, int cancel)
+static int make_resync_request(struct drbd_device *const device, int cancel)
 {
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
 	unsigned long bit;
 	sector_t sector;
 	const sector_t capacity = drbd_get_capacity(device->this_bdev);
 	int max_bio_size;
 	int number, rollback_i, size;
-	int align, queued, sndbuf;
+	int align, requeue = 0;
 	int i = 0;
 
 	if (unlikely(cancel))
@@ -617,17 +619,22 @@
 		goto requeue;
 
 	for (i = 0; i < number; i++) {
-		/* Stop generating RS requests, when half of the send buffer is filled */
-		mutex_lock(&first_peer_device(device)->connection->data.mutex);
-		if (first_peer_device(device)->connection->data.socket) {
-			queued = first_peer_device(device)->connection->data.socket->sk->sk_wmem_queued;
-			sndbuf = first_peer_device(device)->connection->data.socket->sk->sk_sndbuf;
-		} else {
-			queued = 1;
-			sndbuf = 0;
-		}
-		mutex_unlock(&first_peer_device(device)->connection->data.mutex);
-		if (queued > sndbuf / 2)
+		/* Stop generating RS requests when half of the send buffer is filled,
+		 * but notify TCP that we'd like to have more space. */
+		mutex_lock(&connection->data.mutex);
+		if (connection->data.socket) {
+			struct sock *sk = connection->data.socket->sk;
+			int queued = sk->sk_wmem_queued;
+			int sndbuf = sk->sk_sndbuf;
+			if (queued > sndbuf / 2) {
+				requeue = 1;
+				if (sk->sk_socket)
+					set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+			}
+		} else
+			requeue = 1;
+		mutex_unlock(&connection->data.mutex);
+		if (requeue)
 			goto requeue;
 
 next_sector:
@@ -642,8 +649,7 @@
 
 		sector = BM_BIT_TO_SECT(bit);
 
-		if (drbd_rs_should_slow_down(device, sector) ||
-		    drbd_try_rs_begin_io(device, sector)) {
+		if (drbd_try_rs_begin_io(device, sector)) {
 			device->bm_resync_fo = bit;
 			goto requeue;
 		}
@@ -696,9 +702,9 @@
 		/* adjust very last sectors, in case we are oddly sized */
 		if (sector + (size>>9) > capacity)
 			size = (capacity-sector)<<9;
-		if (first_peer_device(device)->connection->agreed_pro_version >= 89 &&
-		    first_peer_device(device)->connection->csums_tfm) {
-			switch (read_for_csum(first_peer_device(device), sector, size)) {
+
+		if (device->use_csums) {
+			switch (read_for_csum(peer_device, sector, size)) {
 			case -EIO: /* Disk failure */
 				put_ldev(device);
 				return -EIO;
@@ -717,7 +723,7 @@
 			int err;
 
 			inc_rs_pending(device);
-			err = drbd_send_drequest(first_peer_device(device), P_RS_DATA_REQUEST,
+			err = drbd_send_drequest(peer_device, P_RS_DATA_REQUEST,
 						 sector, size, ID_SYNCER);
 			if (err) {
 				drbd_err(device, "drbd_send_drequest() failed, aborting...\n");
@@ -774,8 +780,7 @@
 
 		size = BM_BLOCK_SIZE;
 
-		if (drbd_rs_should_slow_down(device, sector) ||
-		    drbd_try_rs_begin_io(device, sector)) {
+		if (drbd_try_rs_begin_io(device, sector)) {
 			device->ov_position = sector;
 			goto requeue;
 		}
@@ -911,7 +916,7 @@
 		if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T)
 			khelper_cmd = "after-resync-target";
 
-		if (first_peer_device(device)->connection->csums_tfm && device->rs_total) {
+		if (device->use_csums && device->rs_total) {
 			const unsigned long s = device->rs_same_csum;
 			const unsigned long t = device->rs_total;
 			const int ratio =
@@ -1351,13 +1356,15 @@
 {
 	struct drbd_request *req = container_of(w, struct drbd_request, w);
 	struct drbd_device *device = req->device;
-	struct drbd_connection *connection = first_peer_device(device)->connection;
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *const connection = peer_device->connection;
 	int err;
 
 	if (unlikely(cancel)) {
 		req_mod(req, SEND_CANCELED);
 		return 0;
 	}
+	req->pre_send_jif = jiffies;
 
 	/* this time, no connection->send.current_epoch_writes++;
 	 * If it was sent, it was the closing barrier for the last
@@ -1365,7 +1372,7 @@
 	 * No more barriers will be sent, until we leave AHEAD mode again. */
 	maybe_send_barrier(connection, req->epoch);
 
-	err = drbd_send_out_of_sync(first_peer_device(device), req);
+	err = drbd_send_out_of_sync(peer_device, req);
 	req_mod(req, OOS_HANDED_TO_NETWORK);
 
 	return err;
@@ -1380,19 +1387,21 @@
 {
 	struct drbd_request *req = container_of(w, struct drbd_request, w);
 	struct drbd_device *device = req->device;
-	struct drbd_connection *connection = first_peer_device(device)->connection;
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *connection = peer_device->connection;
 	int err;
 
 	if (unlikely(cancel)) {
 		req_mod(req, SEND_CANCELED);
 		return 0;
 	}
+	req->pre_send_jif = jiffies;
 
 	re_init_if_first_write(connection, req->epoch);
 	maybe_send_barrier(connection, req->epoch);
 	connection->send.current_epoch_writes++;
 
-	err = drbd_send_dblock(first_peer_device(device), req);
+	err = drbd_send_dblock(peer_device, req);
 	req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK);
 
 	return err;
@@ -1407,19 +1416,21 @@
 {
 	struct drbd_request *req = container_of(w, struct drbd_request, w);
 	struct drbd_device *device = req->device;
-	struct drbd_connection *connection = first_peer_device(device)->connection;
+	struct drbd_peer_device *const peer_device = first_peer_device(device);
+	struct drbd_connection *connection = peer_device->connection;
 	int err;
 
 	if (unlikely(cancel)) {
 		req_mod(req, SEND_CANCELED);
 		return 0;
 	}
+	req->pre_send_jif = jiffies;
 
 	/* Even read requests may close a write epoch,
 	 * if there was any yet. */
 	maybe_send_barrier(connection, req->epoch);
 
-	err = drbd_send_drequest(first_peer_device(device), P_DATA_REQUEST, req->i.sector, req->i.size,
+	err = drbd_send_drequest(peer_device, P_DATA_REQUEST, req->i.sector, req->i.size,
 				 (unsigned long)req);
 
 	req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK);
@@ -1433,7 +1444,7 @@
 	struct drbd_device *device = req->device;
 
 	if (bio_data_dir(req->master_bio) == WRITE && req->rq_state & RQ_IN_ACT_LOG)
-		drbd_al_begin_io(device, &req->i, false);
+		drbd_al_begin_io(device, &req->i);
 
 	drbd_req_make_private_bio(req, req->master_bio);
 	req->private_bio->bi_bdev = device->ldev->backing_bdev;
@@ -1601,26 +1612,32 @@
 void start_resync_timer_fn(unsigned long data)
 {
 	struct drbd_device *device = (struct drbd_device *) data;
-
-	drbd_queue_work(&first_peer_device(device)->connection->sender_work,
-			&device->start_resync_work);
+	drbd_device_post_work(device, RS_START);
 }
 
-int w_start_resync(struct drbd_work *w, int cancel)
+static void do_start_resync(struct drbd_device *device)
 {
-	struct drbd_device *device =
-		container_of(w, struct drbd_device, start_resync_work);
-
 	if (atomic_read(&device->unacked_cnt) || atomic_read(&device->rs_pending_cnt)) {
-		drbd_warn(device, "w_start_resync later...\n");
+		drbd_warn(device, "postponing start_resync ...\n");
 		device->start_resync_timer.expires = jiffies + HZ/10;
 		add_timer(&device->start_resync_timer);
-		return 0;
+		return;
 	}
 
 	drbd_start_resync(device, C_SYNC_SOURCE);
 	clear_bit(AHEAD_TO_SYNC_SOURCE, &device->flags);
-	return 0;
+}
+
+static bool use_checksum_based_resync(struct drbd_connection *connection, struct drbd_device *device)
+{
+	bool csums_after_crash_only;
+	rcu_read_lock();
+	csums_after_crash_only = rcu_dereference(connection->net_conf)->csums_after_crash_only;
+	rcu_read_unlock();
+	return connection->agreed_pro_version >= 89 &&		/* supported? */
+		connection->csums_tfm &&			/* configured? */
+		(csums_after_crash_only == 0			/* use for each resync? */
+		 || test_bit(CRASHED_PRIMARY, &device->flags));	/* or only after Primary crash? */
 }
 
 /**
@@ -1633,6 +1650,8 @@
  */
 void drbd_start_resync(struct drbd_device *device, enum drbd_conns side)
 {
+	struct drbd_peer_device *peer_device = first_peer_device(device);
+	struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
 	union drbd_state ns;
 	int r;
 
@@ -1651,7 +1670,7 @@
 			if (r > 0) {
 				drbd_info(device, "before-resync-target handler returned %d, "
 					 "dropping connection.\n", r);
-				conn_request_state(first_peer_device(device)->connection, NS(conn, C_DISCONNECTING), CS_HARD);
+				conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_HARD);
 				return;
 			}
 		} else /* C_SYNC_SOURCE */ {
@@ -1664,7 +1683,7 @@
 				} else {
 					drbd_info(device, "before-resync-source handler returned %d, "
 						 "dropping connection.\n", r);
-					conn_request_state(first_peer_device(device)->connection,
+					conn_request_state(connection,
 							   NS(conn, C_DISCONNECTING), CS_HARD);
 					return;
 				}
@@ -1672,7 +1691,7 @@
 		}
 	}
 
-	if (current == first_peer_device(device)->connection->worker.task) {
+	if (current == connection->worker.task) {
 		/* The worker should not sleep waiting for state_mutex,
 		   that can take long */
 		if (!mutex_trylock(device->state_mutex)) {
@@ -1733,11 +1752,20 @@
 			device->rs_mark_time[i] = now;
 		}
 		_drbd_pause_after(device);
+		/* Forget potentially stale cached per resync extent bit-counts.
+		 * Open coded drbd_rs_cancel_all(device), we already have IRQs
+		 * disabled, and know the disk state is ok. */
+		spin_lock(&device->al_lock);
+		lc_reset(device->resync);
+		device->resync_locked = 0;
+		device->resync_wenr = LC_FREE;
+		spin_unlock(&device->al_lock);
 	}
 	write_unlock(&global_state_lock);
 	spin_unlock_irq(&device->resource->req_lock);
 
 	if (r == SS_SUCCESS) {
+		wake_up(&device->al_wait); /* for lc_reset() above */
 		/* reset rs_last_bcast when a resync or verify is started,
 		 * to deal with potential jiffies wrap. */
 		device->rs_last_bcast = jiffies - HZ;
@@ -1746,8 +1774,12 @@
 		     drbd_conn_str(ns.conn),
 		     (unsigned long) device->rs_total << (BM_BLOCK_SHIFT-10),
 		     (unsigned long) device->rs_total);
-		if (side == C_SYNC_TARGET)
+		if (side == C_SYNC_TARGET) {
 			device->bm_resync_fo = 0;
+			device->use_csums = use_checksum_based_resync(connection, device);
+		} else {
+			device->use_csums = 0;
+		}
 
 		/* Since protocol 96, we must serialize drbd_gen_and_send_sync_uuid
 		 * with w_send_oos, or the sync target will get confused as to
@@ -1756,12 +1788,10 @@
 		 * drbd_resync_finished from here in that case.
 		 * We drbd_gen_and_send_sync_uuid here for protocol < 96,
 		 * and from after_state_ch otherwise. */
-		if (side == C_SYNC_SOURCE &&
-		    first_peer_device(device)->connection->agreed_pro_version < 96)
-			drbd_gen_and_send_sync_uuid(first_peer_device(device));
+		if (side == C_SYNC_SOURCE && connection->agreed_pro_version < 96)
+			drbd_gen_and_send_sync_uuid(peer_device);
 
-		if (first_peer_device(device)->connection->agreed_pro_version < 95 &&
-		    device->rs_total == 0) {
+		if (connection->agreed_pro_version < 95 && device->rs_total == 0) {
 			/* This still has a race (about when exactly the peers
 			 * detect connection loss) that can lead to a full sync
 			 * on next handshake. In 8.3.9 we fixed this with explicit
@@ -1777,7 +1807,7 @@
 				int timeo;
 
 				rcu_read_lock();
-				nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
+				nc = rcu_dereference(connection->net_conf);
 				timeo = nc->ping_int * HZ + nc->ping_timeo * HZ / 9;
 				rcu_read_unlock();
 				schedule_timeout_interruptible(timeo);
@@ -1799,10 +1829,165 @@
 	mutex_unlock(device->state_mutex);
 }
 
+static void update_on_disk_bitmap(struct drbd_device *device, bool resync_done)
+{
+	struct sib_info sib = { .sib_reason = SIB_SYNC_PROGRESS, };
+	device->rs_last_bcast = jiffies;
+
+	if (!get_ldev(device))
+		return;
+
+	drbd_bm_write_lazy(device, 0);
+	if (resync_done && is_sync_state(device->state.conn))
+		drbd_resync_finished(device);
+
+	drbd_bcast_event(device, &sib);
+	/* update timestamp, in case it took a while to write out stuff */
+	device->rs_last_bcast = jiffies;
+	put_ldev(device);
+}
+
+static void drbd_ldev_destroy(struct drbd_device *device)
+{
+	lc_destroy(device->resync);
+	device->resync = NULL;
+	lc_destroy(device->act_log);
+	device->act_log = NULL;
+	__no_warn(local,
+		drbd_free_ldev(device->ldev);
+		device->ldev = NULL;);
+	clear_bit(GOING_DISKLESS, &device->flags);
+	wake_up(&device->misc_wait);
+}
+
+static void go_diskless(struct drbd_device *device)
+{
+	D_ASSERT(device, device->state.disk == D_FAILED);
+	/* we cannot assert local_cnt == 0 here, as get_ldev_if_state will
+	 * inc/dec it frequently. Once we are D_DISKLESS, no one will touch
+	 * the protected members anymore, though, so once put_ldev reaches zero
+	 * again, it will be safe to free them. */
+
+	/* Try to write changed bitmap pages, read errors may have just
+	 * set some bits outside the area covered by the activity log.
+	 *
+	 * If we have an IO error during the bitmap writeout,
+	 * we will want a full sync next time, just in case.
+	 * (Do we want a specific meta data flag for this?)
+	 *
+	 * If that does not make it to stable storage either,
+	 * we cannot do anything about that anymore.
+	 *
+	 * We still need to check if both bitmap and ldev are present, we may
+	 * end up here after a failed attach, before ldev was even assigned.
+	 */
+	if (device->bitmap && device->ldev) {
+		/* An interrupted resync or similar is allowed to recounts bits
+		 * while we detach.
+		 * Any modifications would not be expected anymore, though.
+		 */
+		if (drbd_bitmap_io_from_worker(device, drbd_bm_write,
+					"detach", BM_LOCKED_TEST_ALLOWED)) {
+			if (test_bit(WAS_READ_ERROR, &device->flags)) {
+				drbd_md_set_flag(device, MDF_FULL_SYNC);
+				drbd_md_sync(device);
+			}
+		}
+	}
+
+	drbd_force_state(device, NS(disk, D_DISKLESS));
+}
+
+static int do_md_sync(struct drbd_device *device)
+{
+	drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n");
+	drbd_md_sync(device);
+	return 0;
+}
+
+/* only called from drbd_worker thread, no locking */
+void __update_timing_details(
+		struct drbd_thread_timing_details *tdp,
+		unsigned int *cb_nr,
+		void *cb,
+		const char *fn, const unsigned int line)
+{
+	unsigned int i = *cb_nr % DRBD_THREAD_DETAILS_HIST;
+	struct drbd_thread_timing_details *td = tdp + i;
+
+	td->start_jif = jiffies;
+	td->cb_addr = cb;
+	td->caller_fn = fn;
+	td->line = line;
+	td->cb_nr = *cb_nr;
+
+	i = (i+1) % DRBD_THREAD_DETAILS_HIST;
+	td = tdp + i;
+	memset(td, 0, sizeof(*td));
+
+	++(*cb_nr);
+}
+
+#define WORK_PENDING(work_bit, todo)	(todo & (1UL << work_bit))
+static void do_device_work(struct drbd_device *device, const unsigned long todo)
+{
+	if (WORK_PENDING(MD_SYNC, todo))
+		do_md_sync(device);
+	if (WORK_PENDING(RS_DONE, todo) ||
+	    WORK_PENDING(RS_PROGRESS, todo))
+		update_on_disk_bitmap(device, WORK_PENDING(RS_DONE, todo));
+	if (WORK_PENDING(GO_DISKLESS, todo))
+		go_diskless(device);
+	if (WORK_PENDING(DESTROY_DISK, todo))
+		drbd_ldev_destroy(device);
+	if (WORK_PENDING(RS_START, todo))
+		do_start_resync(device);
+}
+
+#define DRBD_DEVICE_WORK_MASK	\
+	((1UL << GO_DISKLESS)	\
+	|(1UL << DESTROY_DISK)	\
+	|(1UL << MD_SYNC)	\
+	|(1UL << RS_START)	\
+	|(1UL << RS_PROGRESS)	\
+	|(1UL << RS_DONE)	\
+	)
+
+static unsigned long get_work_bits(unsigned long *flags)
+{
+	unsigned long old, new;
+	do {
+		old = *flags;
+		new = old & ~DRBD_DEVICE_WORK_MASK;
+	} while (cmpxchg(flags, old, new) != old);
+	return old & DRBD_DEVICE_WORK_MASK;
+}
+
+static void do_unqueued_work(struct drbd_connection *connection)
+{
+	struct drbd_peer_device *peer_device;
+	int vnr;
+
+	rcu_read_lock();
+	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
+		struct drbd_device *device = peer_device->device;
+		unsigned long todo = get_work_bits(&device->flags);
+		if (!todo)
+			continue;
+
+		kref_get(&device->kref);
+		rcu_read_unlock();
+		do_device_work(device, todo);
+		kref_put(&device->kref, drbd_destroy_device);
+		rcu_read_lock();
+	}
+	rcu_read_unlock();
+}
+
 static bool dequeue_work_batch(struct drbd_work_queue *queue, struct list_head *work_list)
 {
 	spin_lock_irq(&queue->q_lock);
-	list_splice_init(&queue->q, work_list);
+	list_splice_tail_init(&queue->q, work_list);
 	spin_unlock_irq(&queue->q_lock);
 	return !list_empty(work_list);
 }
@@ -1851,7 +2036,7 @@
 		/* dequeue single item only,
 		 * we still use drbd_queue_work_front() in some places */
 		if (!list_empty(&connection->sender_work.q))
-			list_move(connection->sender_work.q.next, work_list);
+			list_splice_tail_init(&connection->sender_work.q, work_list);
 		spin_unlock(&connection->sender_work.q_lock);	/* FIXME get rid of this one? */
 		if (!list_empty(work_list) || signal_pending(current)) {
 			spin_unlock_irq(&connection->resource->req_lock);
@@ -1873,6 +2058,14 @@
 		if (send_barrier)
 			maybe_send_barrier(connection,
 					connection->send.current_epoch_nr + 1);
+
+		if (test_bit(DEVICE_WORK_PENDING, &connection->flags))
+			break;
+
+		/* drbd_send() may have called flush_signals() */
+		if (get_t_state(&connection->worker) != RUNNING)
+			break;
+
 		schedule();
 		/* may be woken up for other things but new work, too,
 		 * e.g. if the current epoch got closed.
@@ -1906,10 +2099,15 @@
 	while (get_t_state(thi) == RUNNING) {
 		drbd_thread_current_set_cpu(thi);
 
-		/* as long as we use drbd_queue_work_front(),
-		 * we may only dequeue single work items here, not batches. */
-		if (list_empty(&work_list))
+		if (list_empty(&work_list)) {
+			update_worker_timing_details(connection, wait_for_work);
 			wait_for_work(connection, &work_list);
+		}
+
+		if (test_and_clear_bit(DEVICE_WORK_PENDING, &connection->flags)) {
+			update_worker_timing_details(connection, do_unqueued_work);
+			do_unqueued_work(connection);
+		}
 
 		if (signal_pending(current)) {
 			flush_signals(current);
@@ -1926,6 +2124,7 @@
 		while (!list_empty(&work_list)) {
 			w = list_first_entry(&work_list, struct drbd_work, list);
 			list_del_init(&w->list);
+			update_worker_timing_details(connection, w->cb);
 			if (w->cb(w, connection->cstate < C_WF_REPORT_PARAMS) == 0)
 				continue;
 			if (connection->cstate >= C_WF_REPORT_PARAMS)
@@ -1934,13 +2133,18 @@
 	}
 
 	do {
+		if (test_and_clear_bit(DEVICE_WORK_PENDING, &connection->flags)) {
+			update_worker_timing_details(connection, do_unqueued_work);
+			do_unqueued_work(connection);
+		}
 		while (!list_empty(&work_list)) {
 			w = list_first_entry(&work_list, struct drbd_work, list);
 			list_del_init(&w->list);
+			update_worker_timing_details(connection, w->cb);
 			w->cb(w, 1);
 		}
 		dequeue_work_batch(&connection->sender_work, &work_list);
-	} while (!list_empty(&work_list));
+	} while (!list_empty(&work_list) || test_bit(DEVICE_WORK_PENDING, &connection->flags));
 
 	rcu_read_lock();
 	idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b2c98c1..623c841 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -42,6 +42,7 @@
 #include <linux/blkdev.h>
 #include <linux/slab.h>
 #include <linux/idr.h>
+#include <linux/workqueue.h>
 
 #include "rbd_types.h"
 
@@ -332,7 +333,10 @@
 
 	char			name[DEV_NAME_LEN]; /* blkdev name, e.g. rbd3 */
 
+	struct list_head	rq_queue;	/* incoming rq queue */
 	spinlock_t		lock;		/* queue, flags, open_count */
+	struct workqueue_struct	*rq_wq;
+	struct work_struct	rq_work;
 
 	struct rbd_image_header	header;
 	unsigned long		flags;		/* possibly lock protected */
@@ -514,7 +518,8 @@
 
 static int rbd_dev_refresh(struct rbd_device *rbd_dev);
 static int rbd_dev_v2_header_onetime(struct rbd_device *rbd_dev);
-static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev);
+static int rbd_dev_header_info(struct rbd_device *rbd_dev);
+static int rbd_dev_v2_parent_info(struct rbd_device *rbd_dev);
 static const char *rbd_dev_v2_snap_name(struct rbd_device *rbd_dev,
 					u64 snap_id);
 static int _rbd_dev_v2_snap_size(struct rbd_device *rbd_dev, u64 snap_id,
@@ -971,12 +976,6 @@
 	header->snap_names = snap_names;
 	header->snap_sizes = snap_sizes;
 
-	/* Make sure mapping size is consistent with header info */
-
-	if (rbd_dev->spec->snap_id == CEPH_NOSNAP || first_time)
-		if (rbd_dev->mapping.size != header->image_size)
-			rbd_dev->mapping.size = header->image_size;
-
 	return 0;
 out_2big:
 	ret = -EIO;
@@ -1139,6 +1138,13 @@
 	rbd_dev->mapping.features = 0;
 }
 
+static void rbd_segment_name_free(const char *name)
+{
+	/* The explicit cast here is needed to drop the const qualifier */
+
+	kmem_cache_free(rbd_segment_name_cache, (void *)name);
+}
+
 static const char *rbd_segment_name(struct rbd_device *rbd_dev, u64 offset)
 {
 	char *name;
@@ -1158,20 +1164,13 @@
 	if (ret < 0 || ret > CEPH_MAX_OID_NAME_LEN) {
 		pr_err("error formatting segment name for #%llu (%d)\n",
 			segment, ret);
-		kfree(name);
+		rbd_segment_name_free(name);
 		name = NULL;
 	}
 
 	return name;
 }
 
-static void rbd_segment_name_free(const char *name)
-{
-	/* The explicit cast here is needed to drop the const qualifier */
-
-	kmem_cache_free(rbd_segment_name_cache, (void *)name);
-}
-
 static u64 rbd_segment_offset(struct rbd_device *rbd_dev, u64 offset)
 {
 	u64 segment_size = (u64) 1 << rbd_dev->header.obj_order;
@@ -1371,7 +1370,7 @@
 		struct rbd_device *rbd_dev;
 
 		rbd_dev = obj_request->img_request->rbd_dev;
-		rbd_warn(rbd_dev, "obj_request %p already marked img_data\n",
+		rbd_warn(rbd_dev, "obj_request %p already marked img_data",
 			obj_request);
 	}
 }
@@ -1389,7 +1388,7 @@
 
 		if (obj_request_img_data_test(obj_request))
 			rbd_dev = obj_request->img_request->rbd_dev;
-		rbd_warn(rbd_dev, "obj_request %p already marked done\n",
+		rbd_warn(rbd_dev, "obj_request %p already marked done",
 			obj_request);
 	}
 }
@@ -1527,11 +1526,37 @@
 static int rbd_obj_request_submit(struct ceph_osd_client *osdc,
 				struct rbd_obj_request *obj_request)
 {
-	dout("%s: osdc %p obj %p\n", __func__, osdc, obj_request);
-
+	dout("%s %p\n", __func__, obj_request);
 	return ceph_osdc_start_request(osdc, obj_request->osd_req, false);
 }
 
+static void rbd_obj_request_end(struct rbd_obj_request *obj_request)
+{
+	dout("%s %p\n", __func__, obj_request);
+	ceph_osdc_cancel_request(obj_request->osd_req);
+}
+
+/*
+ * Wait for an object request to complete.  If interrupted, cancel the
+ * underlying osd request.
+ */
+static int rbd_obj_request_wait(struct rbd_obj_request *obj_request)
+{
+	int ret;
+
+	dout("%s %p\n", __func__, obj_request);
+
+	ret = wait_for_completion_interruptible(&obj_request->completion);
+	if (ret < 0) {
+		dout("%s %p interrupted\n", __func__, obj_request);
+		rbd_obj_request_end(obj_request);
+		return ret;
+	}
+
+	dout("%s %p done\n", __func__, obj_request);
+	return 0;
+}
+
 static void rbd_img_request_complete(struct rbd_img_request *img_request)
 {
 
@@ -1558,15 +1583,6 @@
 		rbd_img_request_put(img_request);
 }
 
-/* Caller is responsible for rbd_obj_request_destroy(obj_request) */
-
-static int rbd_obj_request_wait(struct rbd_obj_request *obj_request)
-{
-	dout("%s: obj %p\n", __func__, obj_request);
-
-	return wait_for_completion_interruptible(&obj_request->completion);
-}
-
 /*
  * The default/initial value for all image request flags is 0.  Each
  * is conditionally set to 1 at image request initialization time
@@ -1763,7 +1779,7 @@
 		rbd_osd_trivial_callback(obj_request);
 		break;
 	default:
-		rbd_warn(NULL, "%s: unsupported op %hu\n",
+		rbd_warn(NULL, "%s: unsupported op %hu",
 			obj_request->object_name, (unsigned short) opcode);
 		break;
 	}
@@ -1998,7 +2014,7 @@
 	if (!counter)
 		rbd_dev_unparent(rbd_dev);
 	else
-		rbd_warn(rbd_dev, "parent reference underflow\n");
+		rbd_warn(rbd_dev, "parent reference underflow");
 }
 
 /*
@@ -2028,7 +2044,7 @@
 	/* Image was flattened, but parent is not yet torn down */
 
 	if (counter < 0)
-		rbd_warn(rbd_dev, "parent reference overflow\n");
+		rbd_warn(rbd_dev, "parent reference overflow");
 
 	return false;
 }
@@ -2045,7 +2061,7 @@
 {
 	struct rbd_img_request *img_request;
 
-	img_request = kmem_cache_alloc(rbd_img_request_cache, GFP_ATOMIC);
+	img_request = kmem_cache_alloc(rbd_img_request_cache, GFP_NOIO);
 	if (!img_request)
 		return NULL;
 
@@ -2161,11 +2177,11 @@
 	if (result) {
 		struct rbd_device *rbd_dev = img_request->rbd_dev;
 
-		rbd_warn(rbd_dev, "%s %llx at %llx (%llx)\n",
+		rbd_warn(rbd_dev, "%s %llx at %llx (%llx)",
 			img_request_write_test(img_request) ? "write" : "read",
 			obj_request->length, obj_request->img_offset,
 			obj_request->offset);
-		rbd_warn(rbd_dev, "  result %d xferred %x\n",
+		rbd_warn(rbd_dev, "  result %d xferred %x",
 			result, xferred);
 		if (!img_request->result)
 			img_request->result = result;
@@ -2946,11 +2962,73 @@
 	dout("%s: \"%s\" notify_id %llu opcode %u\n", __func__,
 		rbd_dev->header_name, (unsigned long long)notify_id,
 		(unsigned int)opcode);
+
+	/*
+	 * Until adequate refresh error handling is in place, there is
+	 * not much we can do here, except warn.
+	 *
+	 * See http://tracker.ceph.com/issues/5040
+	 */
 	ret = rbd_dev_refresh(rbd_dev);
 	if (ret)
-		rbd_warn(rbd_dev, "header refresh error (%d)\n", ret);
+		rbd_warn(rbd_dev, "refresh failed: %d", ret);
 
-	rbd_obj_notify_ack_sync(rbd_dev, notify_id);
+	ret = rbd_obj_notify_ack_sync(rbd_dev, notify_id);
+	if (ret)
+		rbd_warn(rbd_dev, "notify_ack ret %d", ret);
+}
+
+/*
+ * Send a (un)watch request and wait for the ack.  Return a request
+ * with a ref held on success or error.
+ */
+static struct rbd_obj_request *rbd_obj_watch_request_helper(
+						struct rbd_device *rbd_dev,
+						bool watch)
+{
+	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
+	struct rbd_obj_request *obj_request;
+	int ret;
+
+	obj_request = rbd_obj_request_create(rbd_dev->header_name, 0, 0,
+					     OBJ_REQUEST_NODATA);
+	if (!obj_request)
+		return ERR_PTR(-ENOMEM);
+
+	obj_request->osd_req = rbd_osd_req_create(rbd_dev, true, 1,
+						  obj_request);
+	if (!obj_request->osd_req) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_WATCH,
+			      rbd_dev->watch_event->cookie, 0, watch);
+	rbd_osd_req_format_write(obj_request);
+
+	if (watch)
+		ceph_osdc_set_request_linger(osdc, obj_request->osd_req);
+
+	ret = rbd_obj_request_submit(osdc, obj_request);
+	if (ret)
+		goto out;
+
+	ret = rbd_obj_request_wait(obj_request);
+	if (ret)
+		goto out;
+
+	ret = obj_request->result;
+	if (ret) {
+		if (watch)
+			rbd_obj_request_end(obj_request);
+		goto out;
+	}
+
+	return obj_request;
+
+out:
+	rbd_obj_request_put(obj_request);
+	return ERR_PTR(ret);
 }
 
 /*
@@ -2970,130 +3048,49 @@
 	if (ret < 0)
 		return ret;
 
-	rbd_assert(rbd_dev->watch_event);
-
-	obj_request = rbd_obj_request_create(rbd_dev->header_name, 0, 0,
-					     OBJ_REQUEST_NODATA);
-	if (!obj_request) {
-		ret = -ENOMEM;
-		goto out_cancel;
+	obj_request = rbd_obj_watch_request_helper(rbd_dev, true);
+	if (IS_ERR(obj_request)) {
+		ceph_osdc_cancel_event(rbd_dev->watch_event);
+		rbd_dev->watch_event = NULL;
+		return PTR_ERR(obj_request);
 	}
 
-	obj_request->osd_req = rbd_osd_req_create(rbd_dev, true, 1,
-						  obj_request);
-	if (!obj_request->osd_req) {
-		ret = -ENOMEM;
-		goto out_put;
-	}
-
-	ceph_osdc_set_request_linger(osdc, obj_request->osd_req);
-
-	osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_WATCH,
-			      rbd_dev->watch_event->cookie, 0, 1);
-	rbd_osd_req_format_write(obj_request);
-
-	ret = rbd_obj_request_submit(osdc, obj_request);
-	if (ret)
-		goto out_linger;
-
-	ret = rbd_obj_request_wait(obj_request);
-	if (ret)
-		goto out_linger;
-
-	ret = obj_request->result;
-	if (ret)
-		goto out_linger;
-
 	/*
 	 * A watch request is set to linger, so the underlying osd
 	 * request won't go away until we unregister it.  We retain
 	 * a pointer to the object request during that time (in
-	 * rbd_dev->watch_request), so we'll keep a reference to
-	 * it.  We'll drop that reference (below) after we've
-	 * unregistered it.
+	 * rbd_dev->watch_request), so we'll keep a reference to it.
+	 * We'll drop that reference after we've unregistered it in
+	 * rbd_dev_header_unwatch_sync().
 	 */
 	rbd_dev->watch_request = obj_request;
 
 	return 0;
-
-out_linger:
-	ceph_osdc_unregister_linger_request(osdc, obj_request->osd_req);
-out_put:
-	rbd_obj_request_put(obj_request);
-out_cancel:
-	ceph_osdc_cancel_event(rbd_dev->watch_event);
-	rbd_dev->watch_event = NULL;
-
-	return ret;
 }
 
 /*
  * Tear down a watch request, synchronously.
  */
-static int __rbd_dev_header_unwatch_sync(struct rbd_device *rbd_dev)
+static void rbd_dev_header_unwatch_sync(struct rbd_device *rbd_dev)
 {
-	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
 	struct rbd_obj_request *obj_request;
-	int ret;
 
 	rbd_assert(rbd_dev->watch_event);
 	rbd_assert(rbd_dev->watch_request);
 
-	obj_request = rbd_obj_request_create(rbd_dev->header_name, 0, 0,
-					     OBJ_REQUEST_NODATA);
-	if (!obj_request) {
-		ret = -ENOMEM;
-		goto out_cancel;
-	}
-
-	obj_request->osd_req = rbd_osd_req_create(rbd_dev, true, 1,
-						  obj_request);
-	if (!obj_request->osd_req) {
-		ret = -ENOMEM;
-		goto out_put;
-	}
-
-	osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_WATCH,
-			      rbd_dev->watch_event->cookie, 0, 0);
-	rbd_osd_req_format_write(obj_request);
-
-	ret = rbd_obj_request_submit(osdc, obj_request);
-	if (ret)
-		goto out_put;
-
-	ret = rbd_obj_request_wait(obj_request);
-	if (ret)
-		goto out_put;
-
-	ret = obj_request->result;
-	if (ret)
-		goto out_put;
-
-	/* We have successfully torn down the watch request */
-
-	ceph_osdc_unregister_linger_request(osdc,
-					    rbd_dev->watch_request->osd_req);
+	rbd_obj_request_end(rbd_dev->watch_request);
 	rbd_obj_request_put(rbd_dev->watch_request);
 	rbd_dev->watch_request = NULL;
 
-out_put:
-	rbd_obj_request_put(obj_request);
-out_cancel:
+	obj_request = rbd_obj_watch_request_helper(rbd_dev, false);
+	if (!IS_ERR(obj_request))
+		rbd_obj_request_put(obj_request);
+	else
+		rbd_warn(rbd_dev, "unable to tear down watch request (%ld)",
+			 PTR_ERR(obj_request));
+
 	ceph_osdc_cancel_event(rbd_dev->watch_event);
 	rbd_dev->watch_event = NULL;
-
-	return ret;
-}
-
-static void rbd_dev_header_unwatch_sync(struct rbd_device *rbd_dev)
-{
-	int ret;
-
-	ret = __rbd_dev_header_unwatch_sync(rbd_dev);
-	if (ret) {
-		rbd_warn(rbd_dev, "unable to tear down watch request: %d\n",
-			 ret);
-	}
 }
 
 /*
@@ -3183,21 +3180,116 @@
 	return ret;
 }
 
+static void rbd_handle_request(struct rbd_device *rbd_dev, struct request *rq)
+{
+	struct rbd_img_request *img_request;
+	u64 offset = (u64)blk_rq_pos(rq) << SECTOR_SHIFT;
+	u64 length = blk_rq_bytes(rq);
+	bool wr = rq_data_dir(rq) == WRITE;
+	int result;
+
+	/* Ignore/skip any zero-length requests */
+
+	if (!length) {
+		dout("%s: zero-length request\n", __func__);
+		result = 0;
+		goto err_rq;
+	}
+
+	/* Disallow writes to a read-only device */
+
+	if (wr) {
+		if (rbd_dev->mapping.read_only) {
+			result = -EROFS;
+			goto err_rq;
+		}
+		rbd_assert(rbd_dev->spec->snap_id == CEPH_NOSNAP);
+	}
+
+	/*
+	 * Quit early if the mapped snapshot no longer exists.  It's
+	 * still possible the snapshot will have disappeared by the
+	 * time our request arrives at the osd, but there's no sense in
+	 * sending it if we already know.
+	 */
+	if (!test_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags)) {
+		dout("request for non-existent snapshot");
+		rbd_assert(rbd_dev->spec->snap_id != CEPH_NOSNAP);
+		result = -ENXIO;
+		goto err_rq;
+	}
+
+	if (offset && length > U64_MAX - offset + 1) {
+		rbd_warn(rbd_dev, "bad request range (%llu~%llu)", offset,
+			 length);
+		result = -EINVAL;
+		goto err_rq;	/* Shouldn't happen */
+	}
+
+	if (offset + length > rbd_dev->mapping.size) {
+		rbd_warn(rbd_dev, "beyond EOD (%llu~%llu > %llu)", offset,
+			 length, rbd_dev->mapping.size);
+		result = -EIO;
+		goto err_rq;
+	}
+
+	img_request = rbd_img_request_create(rbd_dev, offset, length, wr);
+	if (!img_request) {
+		result = -ENOMEM;
+		goto err_rq;
+	}
+	img_request->rq = rq;
+
+	result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, rq->bio);
+	if (result)
+		goto err_img_request;
+
+	result = rbd_img_request_submit(img_request);
+	if (result)
+		goto err_img_request;
+
+	return;
+
+err_img_request:
+	rbd_img_request_put(img_request);
+err_rq:
+	if (result)
+		rbd_warn(rbd_dev, "%s %llx at %llx result %d",
+			 wr ? "write" : "read", length, offset, result);
+	blk_end_request_all(rq, result);
+}
+
+static void rbd_request_workfn(struct work_struct *work)
+{
+	struct rbd_device *rbd_dev =
+	    container_of(work, struct rbd_device, rq_work);
+	struct request *rq, *next;
+	LIST_HEAD(requests);
+
+	spin_lock_irq(&rbd_dev->lock); /* rq->q->queue_lock */
+	list_splice_init(&rbd_dev->rq_queue, &requests);
+	spin_unlock_irq(&rbd_dev->lock);
+
+	list_for_each_entry_safe(rq, next, &requests, queuelist) {
+		list_del_init(&rq->queuelist);
+		rbd_handle_request(rbd_dev, rq);
+	}
+}
+
+/*
+ * Called with q->queue_lock held and interrupts disabled, possibly on
+ * the way to schedule().  Do not sleep here!
+ */
 static void rbd_request_fn(struct request_queue *q)
-		__releases(q->queue_lock) __acquires(q->queue_lock)
 {
 	struct rbd_device *rbd_dev = q->queuedata;
 	struct request *rq;
-	int result;
+	int queued = 0;
+
+	rbd_assert(rbd_dev);
 
 	while ((rq = blk_fetch_request(q))) {
-		bool write_request = rq_data_dir(rq) == WRITE;
-		struct rbd_img_request *img_request;
-		u64 offset;
-		u64 length;
-
 		/* Ignore any non-FS requests that filter through. */
-
 		if (rq->cmd_type != REQ_TYPE_FS) {
 			dout("%s: non-fs request type %d\n", __func__,
 				(int) rq->cmd_type);
@@ -3205,80 +3297,12 @@
 			continue;
 		}
 
-		/* Ignore/skip any zero-length requests */
-
-		offset = (u64) blk_rq_pos(rq) << SECTOR_SHIFT;
-		length = (u64) blk_rq_bytes(rq);
-
-		if (!length) {
-			dout("%s: zero-length request\n", __func__);
-			__blk_end_request_all(rq, 0);
-			continue;
-		}
-
-		spin_unlock_irq(q->queue_lock);
-
-		/* Disallow writes to a read-only device */
-
-		if (write_request) {
-			result = -EROFS;
-			if (rbd_dev->mapping.read_only)
-				goto end_request;
-			rbd_assert(rbd_dev->spec->snap_id == CEPH_NOSNAP);
-		}
-
-		/*
-		 * Quit early if the mapped snapshot no longer
-		 * exists.  It's still possible the snapshot will
-		 * have disappeared by the time our request arrives
-		 * at the osd, but there's no sense in sending it if
-		 * we already know.
-		 */
-		if (!test_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags)) {
-			dout("request for non-existent snapshot");
-			rbd_assert(rbd_dev->spec->snap_id != CEPH_NOSNAP);
-			result = -ENXIO;
-			goto end_request;
-		}
-
-		result = -EINVAL;
-		if (offset && length > U64_MAX - offset + 1) {
-			rbd_warn(rbd_dev, "bad request range (%llu~%llu)\n",
-				offset, length);
-			goto end_request;	/* Shouldn't happen */
-		}
-
-		result = -EIO;
-		if (offset + length > rbd_dev->mapping.size) {
-			rbd_warn(rbd_dev, "beyond EOD (%llu~%llu > %llu)\n",
-				offset, length, rbd_dev->mapping.size);
-			goto end_request;
-		}
-
-		result = -ENOMEM;
-		img_request = rbd_img_request_create(rbd_dev, offset, length,
-							write_request);
-		if (!img_request)
-			goto end_request;
-
-		img_request->rq = rq;
-
-		result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO,
-						rq->bio);
-		if (!result)
-			result = rbd_img_request_submit(img_request);
-		if (result)
-			rbd_img_request_put(img_request);
-end_request:
-		spin_lock_irq(q->queue_lock);
-		if (result < 0) {
-			rbd_warn(rbd_dev, "%s %llx at %llx result %d\n",
-				write_request ? "write" : "read",
-				length, offset, result);
-
-			__blk_end_request_all(rq, result);
-		}
+		list_add_tail(&rq->queuelist, &rbd_dev->rq_queue);
+		queued++;
 	}
+
+	if (queued)
+		queue_work(rbd_dev->rq_wq, &rbd_dev->rq_work);
 }
 
 /*
@@ -3517,24 +3541,37 @@
 	u64 mapping_size;
 	int ret;
 
-	rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
 	down_write(&rbd_dev->header_rwsem);
 	mapping_size = rbd_dev->mapping.size;
-	if (rbd_dev->image_format == 1)
-		ret = rbd_dev_v1_header_info(rbd_dev);
-	else
-		ret = rbd_dev_v2_header_info(rbd_dev);
 
-	/* If it's a mapped snapshot, validate its EXISTS flag */
+	ret = rbd_dev_header_info(rbd_dev);
+	if (ret)
+		return ret;
 
-	rbd_exists_validate(rbd_dev);
-	up_write(&rbd_dev->header_rwsem);
-
-	if (mapping_size != rbd_dev->mapping.size) {
-		rbd_dev_update_size(rbd_dev);
+	/*
+	 * If there is a parent, see if it has disappeared due to the
+	 * mapped image getting flattened.
+	 */
+	if (rbd_dev->parent) {
+		ret = rbd_dev_v2_parent_info(rbd_dev);
+		if (ret)
+			return ret;
 	}
 
-	return ret;
+	if (rbd_dev->spec->snap_id == CEPH_NOSNAP) {
+		if (rbd_dev->mapping.size != rbd_dev->header.image_size)
+			rbd_dev->mapping.size = rbd_dev->header.image_size;
+	} else {
+		/* validate mapped snapshot's EXISTS flag */
+		rbd_exists_validate(rbd_dev);
+	}
+
+	up_write(&rbd_dev->header_rwsem);
+
+	if (mapping_size != rbd_dev->mapping.size)
+		rbd_dev_update_size(rbd_dev);
+
+	return 0;
 }
 
 static int rbd_init_disk(struct rbd_device *rbd_dev)
@@ -3696,46 +3733,36 @@
 }
 
 /*
- * For an rbd v2 image, shows the pool id, image id, and snapshot id
- * for the parent image.  If there is no parent, simply shows
- * "(no parent image)".
+ * For a v2 image, shows the chain of parent images, separated by empty
+ * lines.  For v1 images or if there is no parent, shows "(no parent
+ * image)".
  */
 static ssize_t rbd_parent_show(struct device *dev,
-			     struct device_attribute *attr,
-			     char *buf)
+			       struct device_attribute *attr,
+			       char *buf)
 {
 	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
-	struct rbd_spec *spec = rbd_dev->parent_spec;
-	int count;
-	char *bufp = buf;
+	ssize_t count = 0;
 
-	if (!spec)
+	if (!rbd_dev->parent)
 		return sprintf(buf, "(no parent image)\n");
 
-	count = sprintf(bufp, "pool_id %llu\npool_name %s\n",
-			(unsigned long long) spec->pool_id, spec->pool_name);
-	if (count < 0)
-		return count;
-	bufp += count;
+	for ( ; rbd_dev->parent; rbd_dev = rbd_dev->parent) {
+		struct rbd_spec *spec = rbd_dev->parent_spec;
 
-	count = sprintf(bufp, "image_id %s\nimage_name %s\n", spec->image_id,
-			spec->image_name ? spec->image_name : "(unknown)");
-	if (count < 0)
-		return count;
-	bufp += count;
+		count += sprintf(&buf[count], "%s"
+			    "pool_id %llu\npool_name %s\n"
+			    "image_id %s\nimage_name %s\n"
+			    "snap_id %llu\nsnap_name %s\n"
+			    "overlap %llu\n",
+			    !count ? "" : "\n", /* first? */
+			    spec->pool_id, spec->pool_name,
+			    spec->image_id, spec->image_name ?: "(unknown)",
+			    spec->snap_id, spec->snap_name,
+			    rbd_dev->parent_overlap);
+	}
 
-	count = sprintf(bufp, "snap_id %llu\nsnap_name %s\n",
-			(unsigned long long) spec->snap_id, spec->snap_name);
-	if (count < 0)
-		return count;
-	bufp += count;
-
-	count = sprintf(bufp, "overlap %llu\n", rbd_dev->parent_overlap);
-	if (count < 0)
-		return count;
-	bufp += count;
-
-	return (ssize_t) (bufp - buf);
+	return count;
 }
 
 static ssize_t rbd_image_refresh(struct device *dev,
@@ -3748,9 +3775,9 @@
 
 	ret = rbd_dev_refresh(rbd_dev);
 	if (ret)
-		rbd_warn(rbd_dev, ": manual header refresh error (%d)\n", ret);
+		return ret;
 
-	return ret < 0 ? ret : size;
+	return size;
 }
 
 static DEVICE_ATTR(size, S_IRUGO, rbd_size_show, NULL);
@@ -3822,6 +3849,9 @@
 	spec = kzalloc(sizeof (*spec), GFP_KERNEL);
 	if (!spec)
 		return NULL;
+
+	spec->pool_id = CEPH_NOPOOL;
+	spec->snap_id = CEPH_NOSNAP;
 	kref_init(&spec->kref);
 
 	return spec;
@@ -3848,6 +3878,8 @@
 		return NULL;
 
 	spin_lock_init(&rbd_dev->lock);
+	INIT_LIST_HEAD(&rbd_dev->rq_queue);
+	INIT_WORK(&rbd_dev->rq_work, rbd_request_workfn);
 	rbd_dev->flags = 0;
 	atomic_set(&rbd_dev->parent_ref, 0);
 	INIT_LIST_HEAD(&rbd_dev->node);
@@ -4021,7 +4053,7 @@
 		goto out_err;
 	}
 
-	snapid = cpu_to_le64(CEPH_NOSNAP);
+	snapid = cpu_to_le64(rbd_dev->spec->snap_id);
 	ret = rbd_obj_method_sync(rbd_dev, rbd_dev->header_name,
 				"rbd", "get_parent",
 				&snapid, sizeof (snapid),
@@ -4059,7 +4091,7 @@
 
 	ret = -EIO;
 	if (pool_id > (u64)U32_MAX) {
-		rbd_warn(NULL, "parent pool id too large (%llu > %u)\n",
+		rbd_warn(NULL, "parent pool id too large (%llu > %u)",
 			(unsigned long long)pool_id, U32_MAX);
 		goto out_err;
 	}
@@ -4083,6 +4115,8 @@
 		parent_spec->snap_id = snap_id;
 		rbd_dev->parent_spec = parent_spec;
 		parent_spec = NULL;	/* rbd_dev now owns this */
+	} else {
+		kfree(image_id);
 	}
 
 	/*
@@ -4110,8 +4144,7 @@
 			 * overlap is zero we just pretend there was
 			 * no parent image.
 			 */
-			rbd_warn(rbd_dev, "ignoring parent of "
-						"clone with overlap 0\n");
+			rbd_warn(rbd_dev, "ignoring parent with overlap 0");
 		}
 	}
 out:
@@ -4279,18 +4312,38 @@
 }
 
 /*
- * When an rbd image has a parent image, it is identified by the
- * pool, image, and snapshot ids (not names).  This function fills
- * in the names for those ids.  (It's OK if we can't figure out the
- * name for an image id, but the pool and snapshot ids should always
- * exist and have names.)  All names in an rbd spec are dynamically
- * allocated.
- *
- * When an image being mapped (not a parent) is probed, we have the
- * pool name and pool id, image name and image id, and the snapshot
- * name.  The only thing we're missing is the snapshot id.
+ * An image being mapped will have everything but the snap id.
  */
-static int rbd_dev_spec_update(struct rbd_device *rbd_dev)
+static int rbd_spec_fill_snap_id(struct rbd_device *rbd_dev)
+{
+	struct rbd_spec *spec = rbd_dev->spec;
+
+	rbd_assert(spec->pool_id != CEPH_NOPOOL && spec->pool_name);
+	rbd_assert(spec->image_id && spec->image_name);
+	rbd_assert(spec->snap_name);
+
+	if (strcmp(spec->snap_name, RBD_SNAP_HEAD_NAME)) {
+		u64 snap_id;
+
+		snap_id = rbd_snap_id_by_name(rbd_dev, spec->snap_name);
+		if (snap_id == CEPH_NOSNAP)
+			return -ENOENT;
+
+		spec->snap_id = snap_id;
+	} else {
+		spec->snap_id = CEPH_NOSNAP;
+	}
+
+	return 0;
+}
+
+/*
+ * A parent image will have all ids but none of the names.
+ *
+ * All names in an rbd spec are dynamically allocated.  It's OK if we
+ * can't figure out the name for an image id.
+ */
+static int rbd_spec_fill_names(struct rbd_device *rbd_dev)
 {
 	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
 	struct rbd_spec *spec = rbd_dev->spec;
@@ -4299,24 +4352,9 @@
 	const char *snap_name;
 	int ret;
 
-	/*
-	 * An image being mapped will have the pool name (etc.), but
-	 * we need to look up the snapshot id.
-	 */
-	if (spec->pool_name) {
-		if (strcmp(spec->snap_name, RBD_SNAP_HEAD_NAME)) {
-			u64 snap_id;
-
-			snap_id = rbd_snap_id_by_name(rbd_dev, spec->snap_name);
-			if (snap_id == CEPH_NOSNAP)
-				return -ENOENT;
-			spec->snap_id = snap_id;
-		} else {
-			spec->snap_id = CEPH_NOSNAP;
-		}
-
-		return 0;
-	}
+	rbd_assert(spec->pool_id != CEPH_NOPOOL);
+	rbd_assert(spec->image_id);
+	rbd_assert(spec->snap_id != CEPH_NOSNAP);
 
 	/* Get the pool name; we have to make our own copy of this */
 
@@ -4335,7 +4373,7 @@
 	if (!image_name)
 		rbd_warn(rbd_dev, "unable to get image name");
 
-	/* Look up the snapshot name, and make a copy */
+	/* Fetch the snapshot name */
 
 	snap_name = rbd_snap_name(rbd_dev, spec->snap_id);
 	if (IS_ERR(snap_name)) {
@@ -4348,10 +4386,10 @@
 	spec->snap_name = snap_name;
 
 	return 0;
+
 out_err:
 	kfree(image_name);
 	kfree(pool_name);
-
 	return ret;
 }
 
@@ -4483,43 +4521,22 @@
 			return ret;
 	}
 
-	/*
-	 * If the image supports layering, get the parent info.  We
-	 * need to probe the first time regardless.  Thereafter we
-	 * only need to if there's a parent, to see if it has
-	 * disappeared due to the mapped image getting flattened.
-	 */
-	if (rbd_dev->header.features & RBD_FEATURE_LAYERING &&
-			(first_time || rbd_dev->parent_spec)) {
-		bool warn;
-
-		ret = rbd_dev_v2_parent_info(rbd_dev);
-		if (ret)
-			return ret;
-
-		/*
-		 * Print a warning if this is the initial probe and
-		 * the image has a parent.  Don't print it if the
-		 * image now being probed is itself a parent.  We
-		 * can tell at this point because we won't know its
-		 * pool name yet (just its pool id).
-		 */
-		warn = rbd_dev->parent_spec && rbd_dev->spec->pool_name;
-		if (first_time && warn)
-			rbd_warn(rbd_dev, "WARNING: kernel layering "
-					"is EXPERIMENTAL!");
-	}
-
-	if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
-		if (rbd_dev->mapping.size != rbd_dev->header.image_size)
-			rbd_dev->mapping.size = rbd_dev->header.image_size;
-
 	ret = rbd_dev_v2_snap_context(rbd_dev);
 	dout("rbd_dev_v2_snap_context returned %d\n", ret);
 
 	return ret;
 }
 
+static int rbd_dev_header_info(struct rbd_device *rbd_dev)
+{
+	rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
+
+	if (rbd_dev->image_format == 1)
+		return rbd_dev_v1_header_info(rbd_dev);
+
+	return rbd_dev_v2_header_info(rbd_dev);
+}
+
 static int rbd_bus_add_dev(struct rbd_device *rbd_dev)
 {
 	struct device *dev;
@@ -5066,12 +5083,17 @@
 	ret = rbd_dev_mapping_set(rbd_dev);
 	if (ret)
 		goto err_out_disk;
+
 	set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
 	set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
 
+	rbd_dev->rq_wq = alloc_workqueue(rbd_dev->disk->disk_name, 0, 0);
+	if (!rbd_dev->rq_wq)
+		goto err_out_mapping;
+
 	ret = rbd_bus_add_dev(rbd_dev);
 	if (ret)
-		goto err_out_mapping;
+		goto err_out_workqueue;
 
 	/* Everything's ready.  Announce the disk to the world. */
 
@@ -5083,6 +5105,9 @@
 
 	return ret;
 
+err_out_workqueue:
+	destroy_workqueue(rbd_dev->rq_wq);
+	rbd_dev->rq_wq = NULL;
 err_out_mapping:
 	rbd_dev_mapping_clear(rbd_dev);
 err_out_disk:
@@ -5155,8 +5180,6 @@
 	ret = rbd_dev_image_id(rbd_dev);
 	if (ret)
 		return ret;
-	rbd_assert(rbd_dev->spec->image_id);
-	rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
 
 	ret = rbd_dev_header_name(rbd_dev);
 	if (ret)
@@ -5168,25 +5191,45 @@
 			goto out_header_name;
 	}
 
-	if (rbd_dev->image_format == 1)
-		ret = rbd_dev_v1_header_info(rbd_dev);
-	else
-		ret = rbd_dev_v2_header_info(rbd_dev);
+	ret = rbd_dev_header_info(rbd_dev);
 	if (ret)
 		goto err_out_watch;
 
-	ret = rbd_dev_spec_update(rbd_dev);
+	/*
+	 * If this image is the one being mapped, we have pool name and
+	 * id, image name and id, and snap name - need to fill snap id.
+	 * Otherwise this is a parent image, identified by pool, image
+	 * and snap ids - need to fill in names for those ids.
+	 */
+	if (mapping)
+		ret = rbd_spec_fill_snap_id(rbd_dev);
+	else
+		ret = rbd_spec_fill_names(rbd_dev);
 	if (ret)
 		goto err_out_probe;
 
+	if (rbd_dev->header.features & RBD_FEATURE_LAYERING) {
+		ret = rbd_dev_v2_parent_info(rbd_dev);
+		if (ret)
+			goto err_out_probe;
+
+		/*
+		 * Need to warn users if this image is the one being
+		 * mapped and has a parent.
+		 */
+		if (mapping && rbd_dev->parent_spec)
+			rbd_warn(rbd_dev,
+				 "WARNING: kernel layering is EXPERIMENTAL!");
+	}
+
 	ret = rbd_dev_probe_parent(rbd_dev);
 	if (ret)
 		goto err_out_probe;
 
 	dout("discovered format %u image, header name is %s\n",
 		rbd_dev->image_format, rbd_dev->header_name);
-
 	return 0;
+
 err_out_probe:
 	rbd_dev_unprobe(rbd_dev);
 err_out_watch:
@@ -5199,9 +5242,6 @@
 	rbd_dev->image_format = 0;
 	kfree(rbd_dev->spec->image_id);
 	rbd_dev->spec->image_id = NULL;
-
-	dout("probe failed, returning %d\n", ret);
-
 	return ret;
 }
 
@@ -5243,7 +5283,7 @@
 	/* The ceph file layout needs to fit pool id in 32 bits */
 
 	if (spec->pool_id > (u64)U32_MAX) {
-		rbd_warn(NULL, "pool id too large (%llu > %u)\n",
+		rbd_warn(NULL, "pool id too large (%llu > %u)",
 				(unsigned long long)spec->pool_id, U32_MAX);
 		rc = -EIO;
 		goto err_out_client;
@@ -5314,6 +5354,7 @@
 {
 	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
 
+	destroy_workqueue(rbd_dev->rq_wq);
 	rbd_free_disk(rbd_dev);
 	clear_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
 	rbd_dev_mapping_clear(rbd_dev);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index f63d358..0a58140 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -15,17 +15,22 @@
 #include <linux/numa.h>
 
 #define PART_BITS 4
+#define VQ_NAME_LEN 16
 
 static int major;
 static DEFINE_IDA(vd_index_ida);
 
 static struct workqueue_struct *virtblk_wq;
 
+struct virtio_blk_vq {
+	struct virtqueue *vq;
+	spinlock_t lock;
+	char name[VQ_NAME_LEN];
+} ____cacheline_aligned_in_smp;
+
 struct virtio_blk
 {
 	struct virtio_device *vdev;
-	struct virtqueue *vq;
-	spinlock_t vq_lock;
 
 	/* The disk structure for the kernel. */
 	struct gendisk *disk;
@@ -47,6 +52,10 @@
 
 	/* Ida index - used to track minor number allocations. */
 	int index;
+
+	/* num of vqs */
+	int num_vqs;
+	struct virtio_blk_vq *vqs;
 };
 
 struct virtblk_req
@@ -133,14 +142,15 @@
 {
 	struct virtio_blk *vblk = vq->vdev->priv;
 	bool req_done = false;
+	int qid = vq->index;
 	struct virtblk_req *vbr;
 	unsigned long flags;
 	unsigned int len;
 
-	spin_lock_irqsave(&vblk->vq_lock, flags);
+	spin_lock_irqsave(&vblk->vqs[qid].lock, flags);
 	do {
 		virtqueue_disable_cb(vq);
-		while ((vbr = virtqueue_get_buf(vblk->vq, &len)) != NULL) {
+		while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
 			blk_mq_complete_request(vbr->req);
 			req_done = true;
 		}
@@ -151,7 +161,7 @@
 	/* In case queue is stopped waiting for more buffers. */
 	if (req_done)
 		blk_mq_start_stopped_hw_queues(vblk->disk->queue, true);
-	spin_unlock_irqrestore(&vblk->vq_lock, flags);
+	spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
 }
 
 static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx, struct request *req)
@@ -160,6 +170,7 @@
 	struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
 	unsigned long flags;
 	unsigned int num;
+	int qid = hctx->queue_num;
 	const bool last = (req->cmd_flags & REQ_END) != 0;
 	int err;
 	bool notify = false;
@@ -202,12 +213,12 @@
 			vbr->out_hdr.type |= VIRTIO_BLK_T_IN;
 	}
 
-	spin_lock_irqsave(&vblk->vq_lock, flags);
-	err = __virtblk_add_req(vblk->vq, vbr, vbr->sg, num);
+	spin_lock_irqsave(&vblk->vqs[qid].lock, flags);
+	err = __virtblk_add_req(vblk->vqs[qid].vq, vbr, vbr->sg, num);
 	if (err) {
-		virtqueue_kick(vblk->vq);
+		virtqueue_kick(vblk->vqs[qid].vq);
 		blk_mq_stop_hw_queue(hctx);
-		spin_unlock_irqrestore(&vblk->vq_lock, flags);
+		spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
 		/* Out of mem doesn't actually happen, since we fall back
 		 * to direct descriptors */
 		if (err == -ENOMEM || err == -ENOSPC)
@@ -215,12 +226,12 @@
 		return BLK_MQ_RQ_QUEUE_ERROR;
 	}
 
-	if (last && virtqueue_kick_prepare(vblk->vq))
+	if (last && virtqueue_kick_prepare(vblk->vqs[qid].vq))
 		notify = true;
-	spin_unlock_irqrestore(&vblk->vq_lock, flags);
+	spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
 
 	if (notify)
-		virtqueue_notify(vblk->vq);
+		virtqueue_notify(vblk->vqs[qid].vq);
 	return BLK_MQ_RQ_QUEUE_OK;
 }
 
@@ -377,12 +388,64 @@
 static int init_vq(struct virtio_blk *vblk)
 {
 	int err = 0;
+	int i;
+	vq_callback_t **callbacks;
+	const char **names;
+	struct virtqueue **vqs;
+	unsigned short num_vqs;
+	struct virtio_device *vdev = vblk->vdev;
 
-	/* We expect one virtqueue, for output. */
-	vblk->vq = virtio_find_single_vq(vblk->vdev, virtblk_done, "requests");
-	if (IS_ERR(vblk->vq))
-		err = PTR_ERR(vblk->vq);
+	err = virtio_cread_feature(vdev, VIRTIO_BLK_F_MQ,
+				   struct virtio_blk_config, num_queues,
+				   &num_vqs);
+	if (err)
+		num_vqs = 1;
 
+	vblk->vqs = kmalloc(sizeof(*vblk->vqs) * num_vqs, GFP_KERNEL);
+	if (!vblk->vqs) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	names = kmalloc(sizeof(*names) * num_vqs, GFP_KERNEL);
+	if (!names)
+		goto err_names;
+
+	callbacks = kmalloc(sizeof(*callbacks) * num_vqs, GFP_KERNEL);
+	if (!callbacks)
+		goto err_callbacks;
+
+	vqs = kmalloc(sizeof(*vqs) * num_vqs, GFP_KERNEL);
+	if (!vqs)
+		goto err_vqs;
+
+	for (i = 0; i < num_vqs; i++) {
+		callbacks[i] = virtblk_done;
+		snprintf(vblk->vqs[i].name, VQ_NAME_LEN, "req.%d", i);
+		names[i] = vblk->vqs[i].name;
+	}
+
+	/* Discover virtqueues and write information to configuration.  */
+	err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+	if (err)
+		goto err_find_vqs;
+
+	for (i = 0; i < num_vqs; i++) {
+		spin_lock_init(&vblk->vqs[i].lock);
+		vblk->vqs[i].vq = vqs[i];
+	}
+	vblk->num_vqs = num_vqs;
+
+ err_find_vqs:
+	kfree(vqs);
+ err_vqs:
+	kfree(callbacks);
+ err_callbacks:
+	kfree(names);
+ err_names:
+	if (err)
+		kfree(vblk->vqs);
+ out:
 	return err;
 }
 
@@ -551,7 +614,6 @@
 	err = init_vq(vblk);
 	if (err)
 		goto out_free_vblk;
-	spin_lock_init(&vblk->vq_lock);
 
 	/* FIXME: How many partitions?  How long is a piece of string? */
 	vblk->disk = alloc_disk(1 << PART_BITS);
@@ -562,7 +624,7 @@
 
 	/* Default queue sizing is to fill the ring. */
 	if (!virtblk_queue_depth) {
-		virtblk_queue_depth = vblk->vq->num_free;
+		virtblk_queue_depth = vblk->vqs[0].vq->num_free;
 		/* ... but without indirect descs, we use 2 descs per req */
 		if (!virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC))
 			virtblk_queue_depth /= 2;
@@ -570,7 +632,6 @@
 
 	memset(&vblk->tag_set, 0, sizeof(vblk->tag_set));
 	vblk->tag_set.ops = &virtio_mq_ops;
-	vblk->tag_set.nr_hw_queues = 1;
 	vblk->tag_set.queue_depth = virtblk_queue_depth;
 	vblk->tag_set.numa_node = NUMA_NO_NODE;
 	vblk->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
@@ -578,6 +639,7 @@
 		sizeof(struct virtblk_req) +
 		sizeof(struct scatterlist) * sg_elems;
 	vblk->tag_set.driver_data = vblk;
+	vblk->tag_set.nr_hw_queues = vblk->num_vqs;
 
 	err = blk_mq_alloc_tag_set(&vblk->tag_set);
 	if (err)
@@ -727,6 +789,7 @@
 	refc = atomic_read(&disk_to_dev(vblk->disk)->kobj.kref.refcount);
 	put_disk(vblk->disk);
 	vdev->config->del_vqs(vdev);
+	kfree(vblk->vqs);
 	kfree(vblk);
 
 	/* Only free device id if we don't have any users */
@@ -777,7 +840,8 @@
 static unsigned int features[] = {
 	VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX, VIRTIO_BLK_F_GEOMETRY,
 	VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE, VIRTIO_BLK_F_SCSI,
-	VIRTIO_BLK_F_WCE, VIRTIO_BLK_F_TOPOLOGY, VIRTIO_BLK_F_CONFIG_WCE
+	VIRTIO_BLK_F_WCE, VIRTIO_BLK_F_TOPOLOGY, VIRTIO_BLK_F_CONFIG_WCE,
+	VIRTIO_BLK_F_MQ,
 };
 
 static struct virtio_driver virtio_blk = {
diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c
index 8bc4229..4ff8687 100644
--- a/drivers/cpufreq/pmac64-cpufreq.c
+++ b/drivers/cpufreq/pmac64-cpufreq.c
@@ -499,8 +499,7 @@
 	}
 
 	/* Lookup the i2c hwclock */
-	for (hwclock = NULL;
-	     (hwclock = of_find_node_by_name(hwclock, "i2c-hwclock")) != NULL;){
+	for_each_node_by_name(hwclock, "i2c-hwclock") {
 		const char *loc = of_get_property(hwclock,
 				"hwctrl-location", NULL);
 		if (loc == NULL)
diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c
index 544f6d3..061407d 100644
--- a/drivers/crypto/nx/nx-842.c
+++ b/drivers/crypto/nx/nx-842.c
@@ -936,28 +936,14 @@
 		goto error_out;
 	}
 
-	/* Set ptr to new property if provided */
-	if (new_prop) {
-		/* Single property */
-		if (!strncmp(new_prop->name, "status", new_prop->length)) {
-			status = new_prop;
-
-		} else if (!strncmp(new_prop->name, "ibm,max-sg-len",
-					new_prop->length)) {
-			maxsglen = new_prop;
-
-		} else if (!strncmp(new_prop->name, "ibm,max-sync-cop",
-					new_prop->length)) {
-			maxsyncop = new_prop;
-
-		} else {
-			/*
-			 * Skip the update, the property being updated
-			 * has no impact.
-			 */
-			goto out;
-		}
-	}
+	/*
+	 * If this is a property update, there are only certain properties that
+	 * we care about. Bail if it isn't in the below list
+	 */
+	if (new_prop && (strncmp(new_prop->name, "status", new_prop->length) ||
+		         strncmp(new_prop->name, "ibm,max-sg-len", new_prop->length) ||
+		         strncmp(new_prop->name, "ibm,max-sync-cop", new_prop->length)))
+		goto out;
 
 	/* Perform property updates */
 	ret = nx842_OF_upd_status(new_devdata, status);
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 8f6afbf..9b1ea0e 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -393,6 +393,22 @@
 	  channels, Memory Mapped to Stream (MM2S) and Stream to
 	  Memory Mapped (S2MM) for the data transfers.
 
+config DMA_SUN6I
+	tristate "Allwinner A31 SoCs DMA support"
+	depends on MACH_SUN6I || COMPILE_TEST
+	depends on RESET_CONTROLLER
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Support for the DMA engine for Allwinner A31 SoCs.
+
+config NBPFAXI_DMA
+	tristate "Renesas Type-AXI NBPF DMA support"
+	select DMA_ENGINE
+	depends on ARM || COMPILE_TEST
+	help
+	  Support for "Type-AXI" NBPF DMA IPs from Renesas
+
 config DMA_ENGINE
 	bool
 
@@ -406,6 +422,7 @@
 config DMA_OF
 	def_bool y
 	depends on OF
+	select DMA_ENGINE
 
 comment "DMA Clients"
 	depends on DMA_ENGINE
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index bd9e7fa..c6adb92 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -1,5 +1,5 @@
-ccflags-$(CONFIG_DMADEVICES_DEBUG)  := -DDEBUG
-ccflags-$(CONFIG_DMADEVICES_VDEBUG) += -DVERBOSE_DEBUG
+subdir-ccflags-$(CONFIG_DMADEVICES_DEBUG)  := -DDEBUG
+subdir-ccflags-$(CONFIG_DMADEVICES_VDEBUG) += -DVERBOSE_DEBUG
 
 obj-$(CONFIG_DMA_ENGINE) += dmaengine.o
 obj-$(CONFIG_DMA_VIRTUAL_CHANNELS) += virt-dma.o
@@ -48,3 +48,5 @@
 obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
 obj-y += xilinx/
 obj-$(CONFIG_INTEL_MIC_X100_DMA) += mic_x100_dma.o
+obj-$(CONFIG_NBPFAXI_DMA) += nbpfaxi.o
+obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o
diff --git a/drivers/dma/TODO b/drivers/dma/TODO
index 734ed02..b8045cd 100644
--- a/drivers/dma/TODO
+++ b/drivers/dma/TODO
@@ -7,7 +7,6 @@
 	- imx-dma
 	- imx-sdma
 	- mxs-dma.c
-	- dw_dmac
 	- intel_mid_dma
 4. Check other subsystems for dma drivers and merge/move to dmaengine
 5. Remove dma_slave_config's dma direction.
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 8114731..e34024b 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1040,7 +1040,7 @@
 
 		if (early_bytes) {
 			dev_vdbg(&pl08x->adev->dev,
-				"%s byte width LLIs (remain 0x%08x)\n",
+				"%s byte width LLIs (remain 0x%08zx)\n",
 				__func__, bd.remainder);
 			prep_byte_width_lli(pl08x, &bd, &cctl, early_bytes,
 				num_llis++, &total_bytes);
@@ -1653,7 +1653,7 @@
 static struct dma_async_tx_descriptor *pl08x_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
 	struct pl08x_driver_data *pl08x = plchan->host;
@@ -1662,7 +1662,7 @@
 	dma_addr_t slave_addr;
 
 	dev_dbg(&pl08x->adev->dev,
-		"%s prepare cyclic transaction of %d/%d bytes %s %s\n",
+		"%s prepare cyclic transaction of %zd/%zd bytes %s %s\n",
 		__func__, period_len, buf_len,
 		direction == DMA_MEM_TO_DEV ? "to" : "from",
 		plchan->name);
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index c13a3bb..ca9dd26 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -294,14 +294,16 @@
 			ret = -EINVAL;
 			goto out;
 		}
-		atchan->remain_desc -= (desc_cur->lli.ctrla & ATC_BTSIZE_MAX)
-						<< (desc_first->tx_width);
-		if (atchan->remain_desc < 0) {
+
+		count = (desc_cur->lli.ctrla & ATC_BTSIZE_MAX)
+			<< desc_first->tx_width;
+		if (atchan->remain_desc < count) {
 			ret = -EINVAL;
 			goto out;
-		} else {
-			ret = atchan->remain_desc;
 		}
+
+		atchan->remain_desc -= count;
+		ret = atchan->remain_desc;
 	} else {
 		/*
 		 * Get residual bytes when current
@@ -893,12 +895,11 @@
  * @period_len: number of bytes for each period
  * @direction: transfer direction, to or from device
  * @flags: tx descriptor status flags
- * @context: transfer context (ignored)
  */
 static struct dma_async_tx_descriptor *
 atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct at_dma_chan	*atchan = to_at_dma_chan(chan);
 	struct at_dma_slave	*atslave = chan->private;
diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index a036021..6800797 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -335,7 +335,7 @@
 static struct dma_async_tx_descriptor *bcm2835_dma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 	size_t period_len, enum dma_transfer_direction direction,
-	unsigned long flags, void *context)
+	unsigned long flags)
 {
 	struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
 	enum dma_slave_buswidth dev_width;
diff --git a/drivers/dma/dma-jz4740.c b/drivers/dma/dma-jz4740.c
index 94c380f..6a9d89c 100644
--- a/drivers/dma/dma-jz4740.c
+++ b/drivers/dma/dma-jz4740.c
@@ -433,7 +433,7 @@
 static struct dma_async_tx_descriptor *jz4740_dma_prep_dma_cyclic(
 	struct dma_chan *c, dma_addr_t buf_addr, size_t buf_len,
 	size_t period_len, enum dma_transfer_direction direction,
-	unsigned long flags, void *context)
+	unsigned long flags)
 {
 	struct jz4740_dmaengine_chan *chan = to_jz4740_dma_chan(c);
 	struct jz4740_dma_desc *desc;
@@ -614,4 +614,4 @@
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("JZ4740 DMA driver");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index a27ded5..1af731b 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -279,6 +279,19 @@
 	channel_set_bit(dw, CH_EN, dwc->mask);
 }
 
+static void dwc_dostart_first_queued(struct dw_dma_chan *dwc)
+{
+	struct dw_desc *desc;
+
+	if (list_empty(&dwc->queue))
+		return;
+
+	list_move(dwc->queue.next, &dwc->active_list);
+	desc = dwc_first_active(dwc);
+	dev_vdbg(chan2dev(&dwc->chan), "%s: started %u\n", __func__, desc->txd.cookie);
+	dwc_dostart(dwc, desc);
+}
+
 /*----------------------------------------------------------------------*/
 
 static void
@@ -335,10 +348,7 @@
 	 * the completed ones.
 	 */
 	list_splice_init(&dwc->active_list, &list);
-	if (!list_empty(&dwc->queue)) {
-		list_move(dwc->queue.next, &dwc->active_list);
-		dwc_dostart(dwc, dwc_first_active(dwc));
-	}
+	dwc_dostart_first_queued(dwc);
 
 	spin_unlock_irqrestore(&dwc->lock, flags);
 
@@ -467,10 +477,7 @@
 	/* Try to continue after resetting the channel... */
 	dwc_chan_disable(dw, dwc);
 
-	if (!list_empty(&dwc->queue)) {
-		list_move(dwc->queue.next, &dwc->active_list);
-		dwc_dostart(dwc, dwc_first_active(dwc));
-	}
+	dwc_dostart_first_queued(dwc);
 	spin_unlock_irqrestore(&dwc->lock, flags);
 }
 
@@ -677,17 +684,9 @@
 	 * possible, perhaps even appending to those already submitted
 	 * for DMA. But this is hard to do in a race-free manner.
 	 */
-	if (list_empty(&dwc->active_list)) {
-		dev_vdbg(chan2dev(tx->chan), "%s: started %u\n", __func__,
-				desc->txd.cookie);
-		list_add_tail(&desc->desc_node, &dwc->active_list);
-		dwc_dostart(dwc, dwc_first_active(dwc));
-	} else {
-		dev_vdbg(chan2dev(tx->chan), "%s: queued %u\n", __func__,
-				desc->txd.cookie);
 
-		list_add_tail(&desc->desc_node, &dwc->queue);
-	}
+	dev_vdbg(chan2dev(tx->chan), "%s: queued %u\n", __func__, desc->txd.cookie);
+	list_add_tail(&desc->desc_node, &dwc->queue);
 
 	spin_unlock_irqrestore(&dwc->lock, flags);
 
@@ -1092,9 +1091,12 @@
 static void dwc_issue_pending(struct dma_chan *chan)
 {
 	struct dw_dma_chan	*dwc = to_dw_dma_chan(chan);
+	unsigned long		flags;
 
-	if (!list_empty(&dwc->queue))
-		dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
+	spin_lock_irqsave(&dwc->lock, flags);
+	if (list_empty(&dwc->active_list))
+		dwc_dostart_first_queued(dwc);
+	spin_unlock_irqrestore(&dwc->lock, flags);
 }
 
 static int dwc_alloc_chan_resources(struct dma_chan *chan)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index b512caf..7b65633 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -23,6 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
+#include <linux/of.h>
 
 #include <linux/platform_data/edma.h>
 
@@ -256,8 +257,13 @@
 	 * echan->edesc is NULL and exit.)
 	 */
 	if (echan->edesc) {
+		int cyclic = echan->edesc->cyclic;
 		echan->edesc = NULL;
 		edma_stop(echan->ch_num);
+		/* Move the cyclic channel back to default queue */
+		if (cyclic)
+			edma_assign_channel_eventq(echan->ch_num,
+						   EVENTQ_DEFAULT);
 	}
 
 	vchan_get_all_descriptors(&echan->vchan, &head);
@@ -592,7 +598,7 @@
 static struct dma_async_tx_descriptor *edma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 	size_t period_len, enum dma_transfer_direction direction,
-	unsigned long tx_flags, void *context)
+	unsigned long tx_flags)
 {
 	struct edma_chan *echan = to_edma_chan(chan);
 	struct device *dev = chan->device->dev;
@@ -718,12 +724,15 @@
 		edesc->absync = ret;
 
 		/*
-		 * Enable interrupts for every period because callback
-		 * has to be called for every period.
+		 * Enable period interrupt only if it is requested
 		 */
-		edesc->pset[i].param.opt |= TCINTEN;
+		if (tx_flags & DMA_PREP_INTERRUPT)
+			edesc->pset[i].param.opt |= TCINTEN;
 	}
 
+	/* Place the cyclic channel to highest priority queue */
+	edma_assign_channel_eventq(echan->ch_num, EVENTQ_0);
+
 	return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags);
 }
 
@@ -993,7 +1002,7 @@
 	caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
 	caps->cmd_pause = true;
 	caps->cmd_terminate = true;
-	caps->residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR;
+	caps->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
 
 	return 0;
 }
@@ -1040,7 +1049,7 @@
 	ecc->dummy_slot = edma_alloc_slot(ecc->ctlr, EDMA_SLOT_ANY);
 	if (ecc->dummy_slot < 0) {
 		dev_err(&pdev->dev, "Can't allocate PaRAM dummy slot\n");
-		return -EIO;
+		return ecc->dummy_slot;
 	}
 
 	dma_cap_zero(ecc->dma_slave.cap_mask);
@@ -1125,7 +1134,7 @@
 		}
 	}
 
-	if (EDMA_CTLRS == 2) {
+	if (!of_have_populated_dt() && EDMA_CTLRS == 2) {
 		pdev1 = platform_device_register_full(&edma_dev_info1);
 		if (IS_ERR(pdev1)) {
 			platform_driver_unregister(&edma_driver);
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index cb4bf68..7650470 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -1092,7 +1092,6 @@
  * @period_len: length of a single period
  * @dir: direction of the operation
  * @flags: tx descriptor status flags
- * @context: operation context (ignored)
  *
  * Prepares a descriptor for cyclic DMA operation. This means that once the
  * descriptor is submitted, we will be submitting in a @period_len sized
@@ -1105,8 +1104,7 @@
 static struct dma_async_tx_descriptor *
 ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
 			   size_t buf_len, size_t period_len,
-			   enum dma_transfer_direction dir, unsigned long flags,
-			   void *context)
+			   enum dma_transfer_direction dir, unsigned long flags)
 {
 	struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
 	struct ep93xx_dma_desc *desc, *first;
diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c
index b396a7f..3c5711d 100644
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -248,11 +248,12 @@
 			unsigned int slot, bool enable)
 {
 	u32 ch = fsl_chan->vchan.chan.chan_id;
-	void __iomem *muxaddr = fsl_chan->edma->muxbase[ch / DMAMUX_NR];
+	void __iomem *muxaddr;
 	unsigned chans_per_mux, ch_off;
 
 	chans_per_mux = fsl_chan->edma->n_chans / DMAMUX_NR;
 	ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux;
+	muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux];
 
 	if (enable)
 		edma_writeb(fsl_chan->edma,
@@ -516,7 +517,7 @@
 static struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan);
 	struct fsl_edma_desc *fsl_desc;
@@ -724,6 +725,7 @@
 {
 	struct fsl_edma_engine *fsl_edma = ofdma->of_dma_data;
 	struct dma_chan *chan, *_chan;
+	unsigned long chans_per_mux = fsl_edma->n_chans / DMAMUX_NR;
 
 	if (dma_spec->args_count != 2)
 		return NULL;
@@ -732,7 +734,7 @@
 	list_for_each_entry_safe(chan, _chan, &fsl_edma->dma_dev.channels, device_node) {
 		if (chan->client_count)
 			continue;
-		if ((chan->chan_id / DMAMUX_NR) == dma_spec->args[0]) {
+		if ((chan->chan_id / chans_per_mux) == dma_spec->args[0]) {
 			chan = dma_get_slave_channel(chan);
 			if (chan) {
 				chan->device->privatecnt++;
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index e0fec68..d5d6885 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -396,10 +396,17 @@
 	struct fsldma_chan *chan = to_fsl_chan(tx->chan);
 	struct fsl_desc_sw *desc = tx_to_fsl_desc(tx);
 	struct fsl_desc_sw *child;
-	unsigned long flags;
 	dma_cookie_t cookie = -EINVAL;
 
-	spin_lock_irqsave(&chan->desc_lock, flags);
+	spin_lock_bh(&chan->desc_lock);
+
+#ifdef CONFIG_PM
+	if (unlikely(chan->pm_state != RUNNING)) {
+		chan_dbg(chan, "cannot submit due to suspend\n");
+		spin_unlock_bh(&chan->desc_lock);
+		return -1;
+	}
+#endif
 
 	/*
 	 * assign cookies to all of the software descriptors
@@ -412,7 +419,7 @@
 	/* put this transaction onto the tail of the pending queue */
 	append_ld_queue(chan, desc);
 
-	spin_unlock_irqrestore(&chan->desc_lock, flags);
+	spin_unlock_bh(&chan->desc_lock);
 
 	return cookie;
 }
@@ -459,6 +466,88 @@
 }
 
 /**
+ * fsldma_clean_completed_descriptor - free all descriptors which
+ * has been completed and acked
+ * @chan: Freescale DMA channel
+ *
+ * This function is used on all completed and acked descriptors.
+ * All descriptors should only be freed in this function.
+ */
+static void fsldma_clean_completed_descriptor(struct fsldma_chan *chan)
+{
+	struct fsl_desc_sw *desc, *_desc;
+
+	/* Run the callback for each descriptor, in order */
+	list_for_each_entry_safe(desc, _desc, &chan->ld_completed, node)
+		if (async_tx_test_ack(&desc->async_tx))
+			fsl_dma_free_descriptor(chan, desc);
+}
+
+/**
+ * fsldma_run_tx_complete_actions - cleanup a single link descriptor
+ * @chan: Freescale DMA channel
+ * @desc: descriptor to cleanup and free
+ * @cookie: Freescale DMA transaction identifier
+ *
+ * This function is used on a descriptor which has been executed by the DMA
+ * controller. It will run any callbacks, submit any dependencies.
+ */
+static dma_cookie_t fsldma_run_tx_complete_actions(struct fsldma_chan *chan,
+		struct fsl_desc_sw *desc, dma_cookie_t cookie)
+{
+	struct dma_async_tx_descriptor *txd = &desc->async_tx;
+	dma_cookie_t ret = cookie;
+
+	BUG_ON(txd->cookie < 0);
+
+	if (txd->cookie > 0) {
+		ret = txd->cookie;
+
+		/* Run the link descriptor callback function */
+		if (txd->callback) {
+			chan_dbg(chan, "LD %p callback\n", desc);
+			txd->callback(txd->callback_param);
+		}
+	}
+
+	/* Run any dependencies */
+	dma_run_dependencies(txd);
+
+	return ret;
+}
+
+/**
+ * fsldma_clean_running_descriptor - move the completed descriptor from
+ * ld_running to ld_completed
+ * @chan: Freescale DMA channel
+ * @desc: the descriptor which is completed
+ *
+ * Free the descriptor directly if acked by async_tx api, or move it to
+ * queue ld_completed.
+ */
+static void fsldma_clean_running_descriptor(struct fsldma_chan *chan,
+		struct fsl_desc_sw *desc)
+{
+	/* Remove from the list of transactions */
+	list_del(&desc->node);
+
+	/*
+	 * the client is allowed to attach dependent operations
+	 * until 'ack' is set
+	 */
+	if (!async_tx_test_ack(&desc->async_tx)) {
+		/*
+		 * Move this descriptor to the list of descriptors which is
+		 * completed, but still awaiting the 'ack' bit to be set.
+		 */
+		list_add_tail(&desc->node, &chan->ld_completed);
+		return;
+	}
+
+	dma_pool_free(chan->desc_pool, desc, desc->async_tx.phys);
+}
+
+/**
  * fsl_chan_xfer_ld_queue - transfer any pending transactions
  * @chan : Freescale DMA channel
  *
@@ -526,31 +615,58 @@
 }
 
 /**
- * fsldma_cleanup_descriptor - cleanup and free a single link descriptor
+ * fsldma_cleanup_descriptors - cleanup link descriptors which are completed
+ * and move them to ld_completed to free until flag 'ack' is set
  * @chan: Freescale DMA channel
- * @desc: descriptor to cleanup and free
  *
- * This function is used on a descriptor which has been executed by the DMA
- * controller. It will run any callbacks, submit any dependencies, and then
- * free the descriptor.
+ * This function is used on descriptors which have been executed by the DMA
+ * controller. It will run any callbacks, submit any dependencies, then
+ * free these descriptors if flag 'ack' is set.
  */
-static void fsldma_cleanup_descriptor(struct fsldma_chan *chan,
-				      struct fsl_desc_sw *desc)
+static void fsldma_cleanup_descriptors(struct fsldma_chan *chan)
 {
-	struct dma_async_tx_descriptor *txd = &desc->async_tx;
+	struct fsl_desc_sw *desc, *_desc;
+	dma_cookie_t cookie = 0;
+	dma_addr_t curr_phys = get_cdar(chan);
+	int seen_current = 0;
 
-	/* Run the link descriptor callback function */
-	if (txd->callback) {
-		chan_dbg(chan, "LD %p callback\n", desc);
-		txd->callback(txd->callback_param);
+	fsldma_clean_completed_descriptor(chan);
+
+	/* Run the callback for each descriptor, in order */
+	list_for_each_entry_safe(desc, _desc, &chan->ld_running, node) {
+		/*
+		 * do not advance past the current descriptor loaded into the
+		 * hardware channel, subsequent descriptors are either in
+		 * process or have not been submitted
+		 */
+		if (seen_current)
+			break;
+
+		/*
+		 * stop the search if we reach the current descriptor and the
+		 * channel is busy
+		 */
+		if (desc->async_tx.phys == curr_phys) {
+			seen_current = 1;
+			if (!dma_is_idle(chan))
+				break;
+		}
+
+		cookie = fsldma_run_tx_complete_actions(chan, desc, cookie);
+
+		fsldma_clean_running_descriptor(chan, desc);
 	}
 
-	/* Run any dependencies */
-	dma_run_dependencies(txd);
+	/*
+	 * Start any pending transactions automatically
+	 *
+	 * In the ideal case, we keep the DMA controller busy while we go
+	 * ahead and free the descriptors below.
+	 */
+	fsl_chan_xfer_ld_queue(chan);
 
-	dma_descriptor_unmap(txd);
-	chan_dbg(chan, "LD %p free\n", desc);
-	dma_pool_free(chan->desc_pool, desc, txd->phys);
+	if (cookie > 0)
+		chan->common.completed_cookie = cookie;
 }
 
 /**
@@ -617,13 +733,14 @@
 static void fsl_dma_free_chan_resources(struct dma_chan *dchan)
 {
 	struct fsldma_chan *chan = to_fsl_chan(dchan);
-	unsigned long flags;
 
 	chan_dbg(chan, "free all channel resources\n");
-	spin_lock_irqsave(&chan->desc_lock, flags);
+	spin_lock_bh(&chan->desc_lock);
+	fsldma_cleanup_descriptors(chan);
 	fsldma_free_desc_list(chan, &chan->ld_pending);
 	fsldma_free_desc_list(chan, &chan->ld_running);
-	spin_unlock_irqrestore(&chan->desc_lock, flags);
+	fsldma_free_desc_list(chan, &chan->ld_completed);
+	spin_unlock_bh(&chan->desc_lock);
 
 	dma_pool_destroy(chan->desc_pool);
 	chan->desc_pool = NULL;
@@ -842,7 +959,6 @@
 {
 	struct dma_slave_config *config;
 	struct fsldma_chan *chan;
-	unsigned long flags;
 	int size;
 
 	if (!dchan)
@@ -852,7 +968,7 @@
 
 	switch (cmd) {
 	case DMA_TERMINATE_ALL:
-		spin_lock_irqsave(&chan->desc_lock, flags);
+		spin_lock_bh(&chan->desc_lock);
 
 		/* Halt the DMA engine */
 		dma_halt(chan);
@@ -860,9 +976,10 @@
 		/* Remove and free all of the descriptors in the LD queue */
 		fsldma_free_desc_list(chan, &chan->ld_pending);
 		fsldma_free_desc_list(chan, &chan->ld_running);
+		fsldma_free_desc_list(chan, &chan->ld_completed);
 		chan->idle = true;
 
-		spin_unlock_irqrestore(&chan->desc_lock, flags);
+		spin_unlock_bh(&chan->desc_lock);
 		return 0;
 
 	case DMA_SLAVE_CONFIG:
@@ -904,11 +1021,10 @@
 static void fsl_dma_memcpy_issue_pending(struct dma_chan *dchan)
 {
 	struct fsldma_chan *chan = to_fsl_chan(dchan);
-	unsigned long flags;
 
-	spin_lock_irqsave(&chan->desc_lock, flags);
+	spin_lock_bh(&chan->desc_lock);
 	fsl_chan_xfer_ld_queue(chan);
-	spin_unlock_irqrestore(&chan->desc_lock, flags);
+	spin_unlock_bh(&chan->desc_lock);
 }
 
 /**
@@ -919,6 +1035,17 @@
 					dma_cookie_t cookie,
 					struct dma_tx_state *txstate)
 {
+	struct fsldma_chan *chan = to_fsl_chan(dchan);
+	enum dma_status ret;
+
+	ret = dma_cookie_status(dchan, cookie, txstate);
+	if (ret == DMA_COMPLETE)
+		return ret;
+
+	spin_lock_bh(&chan->desc_lock);
+	fsldma_cleanup_descriptors(chan);
+	spin_unlock_bh(&chan->desc_lock);
+
 	return dma_cookie_status(dchan, cookie, txstate);
 }
 
@@ -996,52 +1123,18 @@
 static void dma_do_tasklet(unsigned long data)
 {
 	struct fsldma_chan *chan = (struct fsldma_chan *)data;
-	struct fsl_desc_sw *desc, *_desc;
-	LIST_HEAD(ld_cleanup);
-	unsigned long flags;
 
 	chan_dbg(chan, "tasklet entry\n");
 
-	spin_lock_irqsave(&chan->desc_lock, flags);
-
-	/* update the cookie if we have some descriptors to cleanup */
-	if (!list_empty(&chan->ld_running)) {
-		dma_cookie_t cookie;
-
-		desc = to_fsl_desc(chan->ld_running.prev);
-		cookie = desc->async_tx.cookie;
-		dma_cookie_complete(&desc->async_tx);
-
-		chan_dbg(chan, "completed_cookie=%d\n", cookie);
-	}
-
-	/*
-	 * move the descriptors to a temporary list so we can drop the lock
-	 * during the entire cleanup operation
-	 */
-	list_splice_tail_init(&chan->ld_running, &ld_cleanup);
+	spin_lock_bh(&chan->desc_lock);
 
 	/* the hardware is now idle and ready for more */
 	chan->idle = true;
 
-	/*
-	 * Start any pending transactions automatically
-	 *
-	 * In the ideal case, we keep the DMA controller busy while we go
-	 * ahead and free the descriptors below.
-	 */
-	fsl_chan_xfer_ld_queue(chan);
-	spin_unlock_irqrestore(&chan->desc_lock, flags);
+	/* Run all cleanup for descriptors which have been completed */
+	fsldma_cleanup_descriptors(chan);
 
-	/* Run the callback for each descriptor, in order */
-	list_for_each_entry_safe(desc, _desc, &ld_cleanup, node) {
-
-		/* Remove from the list of transactions */
-		list_del(&desc->node);
-
-		/* Run all cleanup for this descriptor */
-		fsldma_cleanup_descriptor(chan, desc);
-	}
+	spin_unlock_bh(&chan->desc_lock);
 
 	chan_dbg(chan, "tasklet exit\n");
 }
@@ -1225,7 +1318,11 @@
 	spin_lock_init(&chan->desc_lock);
 	INIT_LIST_HEAD(&chan->ld_pending);
 	INIT_LIST_HEAD(&chan->ld_running);
+	INIT_LIST_HEAD(&chan->ld_completed);
 	chan->idle = true;
+#ifdef CONFIG_PM
+	chan->pm_state = RUNNING;
+#endif
 
 	chan->common.device = &fdev->common;
 	dma_cookie_init(&chan->common);
@@ -1365,6 +1462,69 @@
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int fsldma_suspend_late(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct fsldma_device *fdev = platform_get_drvdata(pdev);
+	struct fsldma_chan *chan;
+	int i;
+
+	for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+
+		spin_lock_bh(&chan->desc_lock);
+		if (unlikely(!chan->idle))
+			goto out;
+		chan->regs_save.mr = get_mr(chan);
+		chan->pm_state = SUSPENDED;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+	return 0;
+
+out:
+	for (; i >= 0; i--) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+		chan->pm_state = RUNNING;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+	return -EBUSY;
+}
+
+static int fsldma_resume_early(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct fsldma_device *fdev = platform_get_drvdata(pdev);
+	struct fsldma_chan *chan;
+	u32 mode;
+	int i;
+
+	for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+
+		spin_lock_bh(&chan->desc_lock);
+		mode = chan->regs_save.mr
+			& ~FSL_DMA_MR_CS & ~FSL_DMA_MR_CC & ~FSL_DMA_MR_CA;
+		set_mr(chan, mode);
+		chan->pm_state = RUNNING;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops fsldma_pm_ops = {
+	.suspend_late	= fsldma_suspend_late,
+	.resume_early	= fsldma_resume_early,
+};
+#endif
+
 static const struct of_device_id fsldma_of_ids[] = {
 	{ .compatible = "fsl,elo3-dma", },
 	{ .compatible = "fsl,eloplus-dma", },
@@ -1377,6 +1537,9 @@
 		.name = "fsl-elo-dma",
 		.owner = THIS_MODULE,
 		.of_match_table = fsldma_of_ids,
+#ifdef CONFIG_PM
+		.pm = &fsldma_pm_ops,
+#endif
 	},
 	.probe = fsldma_of_probe,
 	.remove = fsldma_of_remove,
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index d56e835..239c20c 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -134,12 +134,36 @@
 #define FSL_DMA_CHAN_PAUSE_EXT	0x00001000
 #define FSL_DMA_CHAN_START_EXT	0x00002000
 
+#ifdef CONFIG_PM
+struct fsldma_chan_regs_save {
+	u32 mr;
+};
+
+enum fsldma_pm_state {
+	RUNNING = 0,
+	SUSPENDED,
+};
+#endif
+
 struct fsldma_chan {
 	char name[8];			/* Channel name */
 	struct fsldma_chan_regs __iomem *regs;
 	spinlock_t desc_lock;		/* Descriptor operation lock */
-	struct list_head ld_pending;	/* Link descriptors queue */
-	struct list_head ld_running;	/* Link descriptors queue */
+	/*
+	 * Descriptors which are queued to run, but have not yet been
+	 * submitted to the hardware for execution
+	 */
+	struct list_head ld_pending;
+	/*
+	 * Descriptors which are currently being executed by the hardware
+	 */
+	struct list_head ld_running;
+	/*
+	 * Descriptors which have finished execution by the hardware. These
+	 * descriptors have already had their cleanup actions run. They are
+	 * waiting for the ACK bit to be set by the async_tx API.
+	 */
+	struct list_head ld_completed;	/* Link descriptors queue */
 	struct dma_chan common;		/* DMA common channel */
 	struct dma_pool *desc_pool;	/* Descriptors pool */
 	struct device *dev;		/* Channel device */
@@ -148,6 +172,10 @@
 	struct tasklet_struct tasklet;
 	u32 feature;
 	bool idle;			/* DMA controller is idle */
+#ifdef CONFIG_PM
+	struct fsldma_chan_regs_save regs_save;
+	enum fsldma_pm_state pm_state;
+#endif
 
 	void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
 	void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 286660a..9d2c9e7 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -866,7 +866,7 @@
 static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
 	struct imxdma_engine *imxdma = imxdmac->imxdma;
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 14867e3..f7626e3 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -271,6 +271,7 @@
 	unsigned int			chn_count;
 	unsigned int			chn_real_count;
 	struct tasklet_struct		tasklet;
+	struct imx_dma_data		data;
 };
 
 #define IMX_DMA_SG_LOOP		BIT(0)
@@ -749,6 +750,11 @@
 		emi_2_per = sdma->script_addrs->asrc_2_mcu_addr;
 		per_2_per = sdma->script_addrs->per_2_per_addr;
 		break;
+	case IMX_DMATYPE_ASRC_SP:
+		per_2_emi = sdma->script_addrs->shp_2_mcu_addr;
+		emi_2_per = sdma->script_addrs->mcu_2_shp_addr;
+		per_2_per = sdma->script_addrs->per_2_per_addr;
+		break;
 	case IMX_DMATYPE_MSHC:
 		per_2_emi = sdma->script_addrs->mshc_2_mcu_addr;
 		emi_2_per = sdma->script_addrs->mcu_2_mshc_addr;
@@ -911,14 +917,13 @@
 	int channel = sdmac->channel;
 	int ret = -EBUSY;
 
-	sdmac->bd = dma_alloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys, GFP_KERNEL);
+	sdmac->bd = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys,
+					GFP_KERNEL);
 	if (!sdmac->bd) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	memset(sdmac->bd, 0, PAGE_SIZE);
-
 	sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys;
 	sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;
 
@@ -1120,7 +1125,7 @@
 static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct sdma_channel *sdmac = to_sdma_chan(chan);
 	struct sdma_engine *sdma = sdmac->sdma;
@@ -1414,12 +1419,14 @@
 
 static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param)
 {
+	struct sdma_channel *sdmac = to_sdma_chan(chan);
 	struct imx_dma_data *data = fn_param;
 
 	if (!imx_dma_is_general_purpose(chan))
 		return false;
 
-	chan->private = data;
+	sdmac->data = *data;
+	chan->private = &sdmac->data;
 
 	return true;
 }
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 128ca14..bbf6292 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1532,11 +1532,17 @@
 #ifdef DEBUG
 	if (chan->chan_id == IDMAC_IC_7) {
 		ic_sof = ipu_irq_map(69);
-		if (ic_sof > 0)
-			request_irq(ic_sof, ic_sof_irq, 0, "IC SOF", ichan);
+		if (ic_sof > 0) {
+			ret = request_irq(ic_sof, ic_sof_irq, 0, "IC SOF", ichan);
+			if (ret)
+				dev_err(&chan->dev->device, "request irq failed for IC SOF");
+		}
 		ic_eof = ipu_irq_map(70);
-		if (ic_eof > 0)
-			request_irq(ic_eof, ic_eof_irq, 0, "IC EOF", ichan);
+		if (ic_eof > 0) {
+			ret = request_irq(ic_eof, ic_eof_irq, 0, "IC EOF", ichan);
+			if (ret)
+				dev_err(&chan->dev->device, "request irq failed for IC EOF");
+		}
 	}
 #endif
 
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index a7b186d..a1a4db5 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -601,7 +601,7 @@
 mmp_pdma_prep_dma_cyclic(struct dma_chan *dchan,
 			 dma_addr_t buf_addr, size_t len, size_t period_len,
 			 enum dma_transfer_direction direction,
-			 unsigned long flags, void *context)
+			 unsigned long flags)
 {
 	struct mmp_pdma_chan *chan;
 	struct mmp_pdma_desc_sw *first = NULL, *prev = NULL, *new;
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 724f7f4..6ad30e2 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -389,7 +389,7 @@
 static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct mmp_tdma_chan *tdmac = to_mmp_tdma_chan(chan);
 	struct mmp_tdma_desc *desc;
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index 2ad4373..881db2b 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -53,6 +53,7 @@
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/of_irq.h>
+#include <linux/of_dma.h>
 #include <linux/of_platform.h>
 
 #include <linux/random.h>
@@ -1036,7 +1037,15 @@
 	if (retval)
 		goto err_free2;
 
-	return retval;
+	/* Register with OF helpers for DMA lookups (nonfatal) */
+	if (dev->of_node) {
+		retval = of_dma_controller_register(dev->of_node,
+						of_dma_xlate_by_chan_id, mdma);
+		if (retval)
+			dev_warn(dev, "Could not register for OF lookup\n");
+	}
+
+	return 0;
 
 err_free2:
 	if (mdma->is_mpc8308)
@@ -1057,6 +1066,8 @@
 	struct device *dev = &op->dev;
 	struct mpc_dma *mdma = dev_get_drvdata(dev);
 
+	if (dev->of_node)
+		of_dma_controller_free(dev->of_node);
 	dma_async_device_unregister(&mdma->dma);
 	if (mdma->is_mpc8308) {
 		free_irq(mdma->irq2, mdma);
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index ead4913..5ea6120 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -413,16 +413,14 @@
 	struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
 	int ret;
 
-	mxs_chan->ccw = dma_alloc_coherent(mxs_dma->dma_device.dev,
-				CCW_BLOCK_SIZE, &mxs_chan->ccw_phys,
-				GFP_KERNEL);
+	mxs_chan->ccw = dma_zalloc_coherent(mxs_dma->dma_device.dev,
+					    CCW_BLOCK_SIZE,
+					    &mxs_chan->ccw_phys, GFP_KERNEL);
 	if (!mxs_chan->ccw) {
 		ret = -ENOMEM;
 		goto err_alloc;
 	}
 
-	memset(mxs_chan->ccw, 0, CCW_BLOCK_SIZE);
-
 	if (mxs_chan->chan_irq != NO_IRQ) {
 		ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
 					0, "mxs-dma", mxs_dma);
@@ -591,7 +589,7 @@
 static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
 	struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c
new file mode 100644
index 0000000..5aeada5
--- /dev/null
+++ b/drivers/dma/nbpfaxi.c
@@ -0,0 +1,1517 @@
+/*
+ * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
+ * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/dma/nbpfaxi.h>
+
+#include "dmaengine.h"
+
+#define NBPF_REG_CHAN_OFFSET	0
+#define NBPF_REG_CHAN_SIZE	0x40
+
+/* Channel Current Transaction Byte register */
+#define NBPF_CHAN_CUR_TR_BYTE	0x20
+
+/* Channel Status register */
+#define NBPF_CHAN_STAT	0x24
+#define NBPF_CHAN_STAT_EN	1
+#define NBPF_CHAN_STAT_TACT	4
+#define NBPF_CHAN_STAT_ERR	0x10
+#define NBPF_CHAN_STAT_END	0x20
+#define NBPF_CHAN_STAT_TC	0x40
+#define NBPF_CHAN_STAT_DER	0x400
+
+/* Channel Control register */
+#define NBPF_CHAN_CTRL	0x28
+#define NBPF_CHAN_CTRL_SETEN	1
+#define NBPF_CHAN_CTRL_CLREN	2
+#define NBPF_CHAN_CTRL_STG	4
+#define NBPF_CHAN_CTRL_SWRST	8
+#define NBPF_CHAN_CTRL_CLRRQ	0x10
+#define NBPF_CHAN_CTRL_CLREND	0x20
+#define NBPF_CHAN_CTRL_CLRTC	0x40
+#define NBPF_CHAN_CTRL_SETSUS	0x100
+#define NBPF_CHAN_CTRL_CLRSUS	0x200
+
+/* Channel Configuration register */
+#define NBPF_CHAN_CFG	0x2c
+#define NBPF_CHAN_CFG_SEL	7		/* terminal SELect: 0..7 */
+#define NBPF_CHAN_CFG_REQD	8		/* REQuest Direction: DMAREQ is 0: input, 1: output */
+#define NBPF_CHAN_CFG_LOEN	0x10		/* LOw ENable: low DMA request line is: 0: inactive, 1: active */
+#define NBPF_CHAN_CFG_HIEN	0x20		/* HIgh ENable: high DMA request line is: 0: inactive, 1: active */
+#define NBPF_CHAN_CFG_LVL	0x40		/* LeVeL: DMA request line is sensed as 0: edge, 1: level */
+#define NBPF_CHAN_CFG_AM	0x700		/* ACK Mode: 0: Pulse mode, 1: Level mode, b'1x: Bus Cycle */
+#define NBPF_CHAN_CFG_SDS	0xf000		/* Source Data Size: 0: 8 bits,... , 7: 1024 bits */
+#define NBPF_CHAN_CFG_DDS	0xf0000		/* Destination Data Size: as above */
+#define NBPF_CHAN_CFG_SAD	0x100000	/* Source ADdress counting: 0: increment, 1: fixed */
+#define NBPF_CHAN_CFG_DAD	0x200000	/* Destination ADdress counting: 0: increment, 1: fixed */
+#define NBPF_CHAN_CFG_TM	0x400000	/* Transfer Mode: 0: single, 1: block TM */
+#define NBPF_CHAN_CFG_DEM	0x1000000	/* DMAEND interrupt Mask */
+#define NBPF_CHAN_CFG_TCM	0x2000000	/* DMATCO interrupt Mask */
+#define NBPF_CHAN_CFG_SBE	0x8000000	/* Sweep Buffer Enable */
+#define NBPF_CHAN_CFG_RSEL	0x10000000	/* RM: Register Set sELect */
+#define NBPF_CHAN_CFG_RSW	0x20000000	/* RM: Register Select sWitch */
+#define NBPF_CHAN_CFG_REN	0x40000000	/* RM: Register Set Enable */
+#define NBPF_CHAN_CFG_DMS	0x80000000	/* 0: register mode (RM), 1: link mode (LM) */
+
+#define NBPF_CHAN_NXLA	0x38
+#define NBPF_CHAN_CRLA	0x3c
+
+/* Link Header field */
+#define NBPF_HEADER_LV	1
+#define NBPF_HEADER_LE	2
+#define NBPF_HEADER_WBD	4
+#define NBPF_HEADER_DIM	8
+
+#define NBPF_CTRL	0x300
+#define NBPF_CTRL_PR	1		/* 0: fixed priority, 1: round robin */
+#define NBPF_CTRL_LVINT	2		/* DMAEND and DMAERR signalling: 0: pulse, 1: level */
+
+#define NBPF_DSTAT_ER	0x314
+#define NBPF_DSTAT_END	0x318
+
+#define NBPF_DMA_BUSWIDTHS \
+	(BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) | \
+	 BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+	 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+	 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
+	 BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
+
+struct nbpf_config {
+	int num_channels;
+	int buffer_size;
+};
+
+/*
+ * We've got 3 types of objects, used to describe DMA transfers:
+ * 1. high-level descriptor, containing a struct dma_async_tx_descriptor object
+ *	in it, used to communicate with the user
+ * 2. hardware DMA link descriptors, that we pass to DMAC for DMA transfer
+ *	queuing, these must be DMAable, using either the streaming DMA API or
+ *	allocated from coherent memory - one per SG segment
+ * 3. one per SG segment descriptors, used to manage HW link descriptors from
+ *	(2). They do not have to be DMAable. They can either be (a) allocated
+ *	together with link descriptors as mixed (DMA / CPU) objects, or (b)
+ *	separately. Even if allocated separately it would be best to link them
+ *	to link descriptors once during channel resource allocation and always
+ *	use them as a single object.
+ * Therefore for both cases (a) and (b) at run-time objects (2) and (3) shall be
+ * treated as a single SG segment descriptor.
+ */
+
+struct nbpf_link_reg {
+	u32	header;
+	u32	src_addr;
+	u32	dst_addr;
+	u32	transaction_size;
+	u32	config;
+	u32	interval;
+	u32	extension;
+	u32	next;
+} __packed;
+
+struct nbpf_device;
+struct nbpf_channel;
+struct nbpf_desc;
+
+struct nbpf_link_desc {
+	struct nbpf_link_reg *hwdesc;
+	dma_addr_t hwdesc_dma_addr;
+	struct nbpf_desc *desc;
+	struct list_head node;
+};
+
+/**
+ * struct nbpf_desc - DMA transfer descriptor
+ * @async_tx:	dmaengine object
+ * @user_wait:	waiting for a user ack
+ * @length:	total transfer length
+ * @sg:		list of hardware descriptors, represented by struct nbpf_link_desc
+ * @node:	member in channel descriptor lists
+ */
+struct nbpf_desc {
+	struct dma_async_tx_descriptor async_tx;
+	bool user_wait;
+	size_t length;
+	struct nbpf_channel *chan;
+	struct list_head sg;
+	struct list_head node;
+};
+
+/* Take a wild guess: allocate 4 segments per descriptor */
+#define NBPF_SEGMENTS_PER_DESC 4
+#define NBPF_DESCS_PER_PAGE ((PAGE_SIZE - sizeof(struct list_head)) /	\
+	(sizeof(struct nbpf_desc) +					\
+	 NBPF_SEGMENTS_PER_DESC *					\
+	 (sizeof(struct nbpf_link_desc) + sizeof(struct nbpf_link_reg))))
+#define NBPF_SEGMENTS_PER_PAGE (NBPF_SEGMENTS_PER_DESC * NBPF_DESCS_PER_PAGE)
+
+struct nbpf_desc_page {
+	struct list_head node;
+	struct nbpf_desc desc[NBPF_DESCS_PER_PAGE];
+	struct nbpf_link_desc ldesc[NBPF_SEGMENTS_PER_PAGE];
+	struct nbpf_link_reg hwdesc[NBPF_SEGMENTS_PER_PAGE];
+};
+
+/**
+ * struct nbpf_channel - one DMAC channel
+ * @dma_chan:	standard dmaengine channel object
+ * @base:	register address base
+ * @nbpf:	DMAC
+ * @name:	IRQ name
+ * @irq:	IRQ number
+ * @slave_addr:	address for slave DMA
+ * @slave_width:slave data size in bytes
+ * @slave_burst:maximum slave burst size in bytes
+ * @terminal:	DMA terminal, assigned to this channel
+ * @dmarq_cfg:	DMA request line configuration - high / low, edge / level for NBPF_CHAN_CFG
+ * @flags:	configuration flags from DT
+ * @lock:	protect descriptor lists
+ * @free_links:	list of free link descriptors
+ * @free:	list of free descriptors
+ * @queued:	list of queued descriptors
+ * @active:	list of descriptors, scheduled for processing
+ * @done:	list of completed descriptors, waiting post-processing
+ * @desc_page:	list of additionally allocated descriptor pages - if any
+ */
+struct nbpf_channel {
+	struct dma_chan dma_chan;
+	struct tasklet_struct tasklet;
+	void __iomem *base;
+	struct nbpf_device *nbpf;
+	char name[16];
+	int irq;
+	dma_addr_t slave_src_addr;
+	size_t slave_src_width;
+	size_t slave_src_burst;
+	dma_addr_t slave_dst_addr;
+	size_t slave_dst_width;
+	size_t slave_dst_burst;
+	unsigned int terminal;
+	u32 dmarq_cfg;
+	unsigned long flags;
+	spinlock_t lock;
+	struct list_head free_links;
+	struct list_head free;
+	struct list_head queued;
+	struct list_head active;
+	struct list_head done;
+	struct list_head desc_page;
+	struct nbpf_desc *running;
+	bool paused;
+};
+
+struct nbpf_device {
+	struct dma_device dma_dev;
+	void __iomem *base;
+	struct clk *clk;
+	const struct nbpf_config *config;
+	struct nbpf_channel chan[];
+};
+
+enum nbpf_model {
+	NBPF1B4,
+	NBPF1B8,
+	NBPF1B16,
+	NBPF4B4,
+	NBPF4B8,
+	NBPF4B16,
+	NBPF8B4,
+	NBPF8B8,
+	NBPF8B16,
+};
+
+static struct nbpf_config nbpf_cfg[] = {
+	[NBPF1B4] = {
+		.num_channels = 1,
+		.buffer_size = 4,
+	},
+	[NBPF1B8] = {
+		.num_channels = 1,
+		.buffer_size = 8,
+	},
+	[NBPF1B16] = {
+		.num_channels = 1,
+		.buffer_size = 16,
+	},
+	[NBPF4B4] = {
+		.num_channels = 4,
+		.buffer_size = 4,
+	},
+	[NBPF4B8] = {
+		.num_channels = 4,
+		.buffer_size = 8,
+	},
+	[NBPF4B16] = {
+		.num_channels = 4,
+		.buffer_size = 16,
+	},
+	[NBPF8B4] = {
+		.num_channels = 8,
+		.buffer_size = 4,
+	},
+	[NBPF8B8] = {
+		.num_channels = 8,
+		.buffer_size = 8,
+	},
+	[NBPF8B16] = {
+		.num_channels = 8,
+		.buffer_size = 16,
+	},
+};
+
+#define nbpf_to_chan(d) container_of(d, struct nbpf_channel, dma_chan)
+
+/*
+ * dmaengine drivers seem to have a lot in common and instead of sharing more
+ * code, they reimplement those common algorithms independently. In this driver
+ * we try to separate the hardware-specific part from the (largely) generic
+ * part. This improves code readability and makes it possible in the future to
+ * reuse the generic code in form of a helper library. That generic code should
+ * be suitable for various DMA controllers, using transfer descriptors in RAM
+ * and pushing one SG list at a time to the DMA controller.
+ */
+
+/*		Hardware-specific part		*/
+
+static inline u32 nbpf_chan_read(struct nbpf_channel *chan,
+				 unsigned int offset)
+{
+	u32 data = ioread32(chan->base + offset);
+	dev_dbg(chan->dma_chan.device->dev, "%s(0x%p + 0x%x) = 0x%x\n",
+		__func__, chan->base, offset, data);
+	return data;
+}
+
+static inline void nbpf_chan_write(struct nbpf_channel *chan,
+				   unsigned int offset, u32 data)
+{
+	iowrite32(data, chan->base + offset);
+	dev_dbg(chan->dma_chan.device->dev, "%s(0x%p + 0x%x) = 0x%x\n",
+		__func__, chan->base, offset, data);
+}
+
+static inline u32 nbpf_read(struct nbpf_device *nbpf,
+			    unsigned int offset)
+{
+	u32 data = ioread32(nbpf->base + offset);
+	dev_dbg(nbpf->dma_dev.dev, "%s(0x%p + 0x%x) = 0x%x\n",
+		__func__, nbpf->base, offset, data);
+	return data;
+}
+
+static inline void nbpf_write(struct nbpf_device *nbpf,
+			      unsigned int offset, u32 data)
+{
+	iowrite32(data, nbpf->base + offset);
+	dev_dbg(nbpf->dma_dev.dev, "%s(0x%p + 0x%x) = 0x%x\n",
+		__func__, nbpf->base, offset, data);
+}
+
+static void nbpf_chan_halt(struct nbpf_channel *chan)
+{
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_CLREN);
+}
+
+static bool nbpf_status_get(struct nbpf_channel *chan)
+{
+	u32 status = nbpf_read(chan->nbpf, NBPF_DSTAT_END);
+
+	return status & BIT(chan - chan->nbpf->chan);
+}
+
+static void nbpf_status_ack(struct nbpf_channel *chan)
+{
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_CLREND);
+}
+
+static u32 nbpf_error_get(struct nbpf_device *nbpf)
+{
+	return nbpf_read(nbpf, NBPF_DSTAT_ER);
+}
+
+static struct nbpf_channel *nbpf_error_get_channel(struct nbpf_device *nbpf, u32 error)
+{
+	return nbpf->chan + __ffs(error);
+}
+
+static void nbpf_error_clear(struct nbpf_channel *chan)
+{
+	u32 status;
+	int i;
+
+	/* Stop the channel, make sure DMA has been aborted */
+	nbpf_chan_halt(chan);
+
+	for (i = 1000; i; i--) {
+		status = nbpf_chan_read(chan, NBPF_CHAN_STAT);
+		if (!(status & NBPF_CHAN_STAT_TACT))
+			break;
+		cpu_relax();
+	}
+
+	if (!i)
+		dev_err(chan->dma_chan.device->dev,
+			"%s(): abort timeout, channel status 0x%x\n", __func__, status);
+
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_SWRST);
+}
+
+static int nbpf_start(struct nbpf_desc *desc)
+{
+	struct nbpf_channel *chan = desc->chan;
+	struct nbpf_link_desc *ldesc = list_first_entry(&desc->sg, struct nbpf_link_desc, node);
+
+	nbpf_chan_write(chan, NBPF_CHAN_NXLA, (u32)ldesc->hwdesc_dma_addr);
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_SETEN | NBPF_CHAN_CTRL_CLRSUS);
+	chan->paused = false;
+
+	/* Software trigger MEMCPY - only MEMCPY uses the block mode */
+	if (ldesc->hwdesc->config & NBPF_CHAN_CFG_TM)
+		nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_STG);
+
+	dev_dbg(chan->nbpf->dma_dev.dev, "%s(): next 0x%x, cur 0x%x\n", __func__,
+		nbpf_chan_read(chan, NBPF_CHAN_NXLA), nbpf_chan_read(chan, NBPF_CHAN_CRLA));
+
+	return 0;
+}
+
+static void nbpf_chan_prepare(struct nbpf_channel *chan)
+{
+	chan->dmarq_cfg = (chan->flags & NBPF_SLAVE_RQ_HIGH ? NBPF_CHAN_CFG_HIEN : 0) |
+		(chan->flags & NBPF_SLAVE_RQ_LOW ? NBPF_CHAN_CFG_LOEN : 0) |
+		(chan->flags & NBPF_SLAVE_RQ_LEVEL ?
+		 NBPF_CHAN_CFG_LVL | (NBPF_CHAN_CFG_AM & 0x200) : 0) |
+		chan->terminal;
+}
+
+static void nbpf_chan_prepare_default(struct nbpf_channel *chan)
+{
+	/* Don't output DMAACK */
+	chan->dmarq_cfg = NBPF_CHAN_CFG_AM & 0x400;
+	chan->terminal = 0;
+	chan->flags = 0;
+}
+
+static void nbpf_chan_configure(struct nbpf_channel *chan)
+{
+	/*
+	 * We assume, that only the link mode and DMA request line configuration
+	 * have to be set in the configuration register manually. Dynamic
+	 * per-transfer configuration will be loaded from transfer descriptors.
+	 */
+	nbpf_chan_write(chan, NBPF_CHAN_CFG, NBPF_CHAN_CFG_DMS | chan->dmarq_cfg);
+}
+
+static u32 nbpf_xfer_ds(struct nbpf_device *nbpf, size_t size)
+{
+	/* Maximum supported bursts depend on the buffer size */
+	return min_t(int, __ffs(size), ilog2(nbpf->config->buffer_size * 8));
+}
+
+static size_t nbpf_xfer_size(struct nbpf_device *nbpf,
+			     enum dma_slave_buswidth width, u32 burst)
+{
+	size_t size;
+
+	if (!burst)
+		burst = 1;
+
+	switch (width) {
+	case DMA_SLAVE_BUSWIDTH_8_BYTES:
+		size = 8 * burst;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_4_BYTES:
+		size = 4 * burst;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_2_BYTES:
+		size = 2 * burst;
+		break;
+
+	default:
+		pr_warn("%s(): invalid bus width %u\n", __func__, width);
+	case DMA_SLAVE_BUSWIDTH_1_BYTE:
+		size = burst;
+	}
+
+	return nbpf_xfer_ds(nbpf, size);
+}
+
+/*
+ * We need a way to recognise slaves, whose data is sent "raw" over the bus,
+ * i.e. it isn't known in advance how many bytes will be received. Therefore
+ * the slave driver has to provide a "large enough" buffer and either read the
+ * buffer, when it is full, or detect, that some data has arrived, then wait for
+ * a timeout, if no more data arrives - receive what's already there. We want to
+ * handle such slaves in a special way to allow an optimised mode for other
+ * users, for whom the amount of data is known in advance. So far there's no way
+ * to recognise such slaves. We use a data-width check to distinguish between
+ * the SD host and the PL011 UART.
+ */
+
+static int nbpf_prep_one(struct nbpf_link_desc *ldesc,
+			 enum dma_transfer_direction direction,
+			 dma_addr_t src, dma_addr_t dst, size_t size, bool last)
+{
+	struct nbpf_link_reg *hwdesc = ldesc->hwdesc;
+	struct nbpf_desc *desc = ldesc->desc;
+	struct nbpf_channel *chan = desc->chan;
+	struct device *dev = chan->dma_chan.device->dev;
+	size_t mem_xfer, slave_xfer;
+	bool can_burst;
+
+	hwdesc->header = NBPF_HEADER_WBD | NBPF_HEADER_LV |
+		(last ? NBPF_HEADER_LE : 0);
+
+	hwdesc->src_addr = src;
+	hwdesc->dst_addr = dst;
+	hwdesc->transaction_size = size;
+
+	/*
+	 * set config: SAD, DAD, DDS, SDS, etc.
+	 * Note on transfer sizes: the DMAC can perform unaligned DMA transfers,
+	 * but it is important to have transaction size a multiple of both
+	 * receiver and transmitter transfer sizes. It is also possible to use
+	 * different RAM and device transfer sizes, and it does work well with
+	 * some devices, e.g. with V08R07S01E SD host controllers, which can use
+	 * 128 byte transfers. But this doesn't work with other devices,
+	 * especially when the transaction size is unknown. This is the case,
+	 * e.g. with serial drivers like amba-pl011.c. For reception it sets up
+	 * the transaction size of 4K and if fewer bytes are received, it
+	 * pauses DMA and reads out data received via DMA as well as those left
+	 * in the Rx FIFO. For this to work with the RAM side using burst
+	 * transfers we enable the SBE bit and terminate the transfer in our
+	 * DMA_PAUSE handler.
+	 */
+	mem_xfer = nbpf_xfer_ds(chan->nbpf, size);
+
+	switch (direction) {
+	case DMA_DEV_TO_MEM:
+		can_burst = chan->slave_src_width >= 3;
+		slave_xfer = min(mem_xfer, can_burst ?
+				 chan->slave_src_burst : chan->slave_src_width);
+		/*
+		 * Is the slave narrower than 64 bits, i.e. isn't using the full
+		 * bus width and cannot use bursts?
+		 */
+		if (mem_xfer > chan->slave_src_burst && !can_burst)
+			mem_xfer = chan->slave_src_burst;
+		/* Device-to-RAM DMA is unreliable without REQD set */
+		hwdesc->config = NBPF_CHAN_CFG_SAD | (NBPF_CHAN_CFG_DDS & (mem_xfer << 16)) |
+			(NBPF_CHAN_CFG_SDS & (slave_xfer << 12)) | NBPF_CHAN_CFG_REQD |
+			NBPF_CHAN_CFG_SBE;
+		break;
+
+	case DMA_MEM_TO_DEV:
+		slave_xfer = min(mem_xfer, chan->slave_dst_width >= 3 ?
+				 chan->slave_dst_burst : chan->slave_dst_width);
+		hwdesc->config = NBPF_CHAN_CFG_DAD | (NBPF_CHAN_CFG_SDS & (mem_xfer << 12)) |
+			(NBPF_CHAN_CFG_DDS & (slave_xfer << 16)) | NBPF_CHAN_CFG_REQD;
+		break;
+
+	case DMA_MEM_TO_MEM:
+		hwdesc->config = NBPF_CHAN_CFG_TCM | NBPF_CHAN_CFG_TM |
+			(NBPF_CHAN_CFG_SDS & (mem_xfer << 12)) |
+			(NBPF_CHAN_CFG_DDS & (mem_xfer << 16));
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	hwdesc->config |= chan->dmarq_cfg | (last ? 0 : NBPF_CHAN_CFG_DEM) |
+		NBPF_CHAN_CFG_DMS;
+
+	dev_dbg(dev, "%s(): desc @ %pad: hdr 0x%x, cfg 0x%x, %zu @ %pad -> %pad\n",
+		__func__, &ldesc->hwdesc_dma_addr, hwdesc->header,
+		hwdesc->config, size, &src, &dst);
+
+	dma_sync_single_for_device(dev, ldesc->hwdesc_dma_addr, sizeof(*hwdesc),
+				   DMA_TO_DEVICE);
+
+	return 0;
+}
+
+static size_t nbpf_bytes_left(struct nbpf_channel *chan)
+{
+	return nbpf_chan_read(chan, NBPF_CHAN_CUR_TR_BYTE);
+}
+
+static void nbpf_configure(struct nbpf_device *nbpf)
+{
+	nbpf_write(nbpf, NBPF_CTRL, NBPF_CTRL_LVINT);
+}
+
+static void nbpf_pause(struct nbpf_channel *chan)
+{
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_SETSUS);
+	/* See comment in nbpf_prep_one() */
+	nbpf_chan_write(chan, NBPF_CHAN_CTRL, NBPF_CHAN_CTRL_CLREN);
+}
+
+/*		Generic part			*/
+
+/* DMA ENGINE functions */
+static void nbpf_issue_pending(struct dma_chan *dchan)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	unsigned long flags;
+
+	dev_dbg(dchan->device->dev, "Entry %s()\n", __func__);
+
+	spin_lock_irqsave(&chan->lock, flags);
+	if (list_empty(&chan->queued))
+		goto unlock;
+
+	list_splice_tail_init(&chan->queued, &chan->active);
+
+	if (!chan->running) {
+		struct nbpf_desc *desc = list_first_entry(&chan->active,
+						struct nbpf_desc, node);
+		if (!nbpf_start(desc))
+			chan->running = desc;
+	}
+
+unlock:
+	spin_unlock_irqrestore(&chan->lock, flags);
+}
+
+static enum dma_status nbpf_tx_status(struct dma_chan *dchan,
+		dma_cookie_t cookie, struct dma_tx_state *state)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	enum dma_status status = dma_cookie_status(dchan, cookie, state);
+
+	if (state) {
+		dma_cookie_t running;
+		unsigned long flags;
+
+		spin_lock_irqsave(&chan->lock, flags);
+		running = chan->running ? chan->running->async_tx.cookie : -EINVAL;
+
+		if (cookie == running) {
+			state->residue = nbpf_bytes_left(chan);
+			dev_dbg(dchan->device->dev, "%s(): residue %u\n", __func__,
+				state->residue);
+		} else if (status == DMA_IN_PROGRESS) {
+			struct nbpf_desc *desc;
+			bool found = false;
+
+			list_for_each_entry(desc, &chan->active, node)
+				if (desc->async_tx.cookie == cookie) {
+					found = true;
+					break;
+				}
+
+			if (!found)
+				list_for_each_entry(desc, &chan->queued, node)
+					if (desc->async_tx.cookie == cookie) {
+						found = true;
+						break;
+
+					}
+
+			state->residue = found ? desc->length : 0;
+		}
+
+		spin_unlock_irqrestore(&chan->lock, flags);
+	}
+
+	if (chan->paused)
+		status = DMA_PAUSED;
+
+	return status;
+}
+
+static dma_cookie_t nbpf_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+	struct nbpf_desc *desc = container_of(tx, struct nbpf_desc, async_tx);
+	struct nbpf_channel *chan = desc->chan;
+	unsigned long flags;
+	dma_cookie_t cookie;
+
+	spin_lock_irqsave(&chan->lock, flags);
+	cookie = dma_cookie_assign(tx);
+	list_add_tail(&desc->node, &chan->queued);
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	dev_dbg(chan->dma_chan.device->dev, "Entry %s(%d)\n", __func__, cookie);
+
+	return cookie;
+}
+
+static int nbpf_desc_page_alloc(struct nbpf_channel *chan)
+{
+	struct dma_chan *dchan = &chan->dma_chan;
+	struct nbpf_desc_page *dpage = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+	struct nbpf_link_desc *ldesc;
+	struct nbpf_link_reg *hwdesc;
+	struct nbpf_desc *desc;
+	LIST_HEAD(head);
+	LIST_HEAD(lhead);
+	int i;
+	struct device *dev = dchan->device->dev;
+
+	if (!dpage)
+		return -ENOMEM;
+
+	dev_dbg(dev, "%s(): alloc %lu descriptors, %lu segments, total alloc %zu\n",
+		__func__, NBPF_DESCS_PER_PAGE, NBPF_SEGMENTS_PER_PAGE, sizeof(*dpage));
+
+	for (i = 0, ldesc = dpage->ldesc, hwdesc = dpage->hwdesc;
+	     i < ARRAY_SIZE(dpage->ldesc);
+	     i++, ldesc++, hwdesc++) {
+		ldesc->hwdesc = hwdesc;
+		list_add_tail(&ldesc->node, &lhead);
+		ldesc->hwdesc_dma_addr = dma_map_single(dchan->device->dev,
+					hwdesc, sizeof(*hwdesc), DMA_TO_DEVICE);
+
+		dev_dbg(dev, "%s(): mapped 0x%p to %pad\n", __func__,
+			hwdesc, &ldesc->hwdesc_dma_addr);
+	}
+
+	for (i = 0, desc = dpage->desc;
+	     i < ARRAY_SIZE(dpage->desc);
+	     i++, desc++) {
+		dma_async_tx_descriptor_init(&desc->async_tx, dchan);
+		desc->async_tx.tx_submit = nbpf_tx_submit;
+		desc->chan = chan;
+		INIT_LIST_HEAD(&desc->sg);
+		list_add_tail(&desc->node, &head);
+	}
+
+	/*
+	 * This function cannot be called from interrupt context, so, no need to
+	 * save flags
+	 */
+	spin_lock_irq(&chan->lock);
+	list_splice_tail(&lhead, &chan->free_links);
+	list_splice_tail(&head, &chan->free);
+	list_add(&dpage->node, &chan->desc_page);
+	spin_unlock_irq(&chan->lock);
+
+	return ARRAY_SIZE(dpage->desc);
+}
+
+static void nbpf_desc_put(struct nbpf_desc *desc)
+{
+	struct nbpf_channel *chan = desc->chan;
+	struct nbpf_link_desc *ldesc, *tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&chan->lock, flags);
+	list_for_each_entry_safe(ldesc, tmp, &desc->sg, node)
+		list_move(&ldesc->node, &chan->free_links);
+
+	list_add(&desc->node, &chan->free);
+	spin_unlock_irqrestore(&chan->lock, flags);
+}
+
+static void nbpf_scan_acked(struct nbpf_channel *chan)
+{
+	struct nbpf_desc *desc, *tmp;
+	unsigned long flags;
+	LIST_HEAD(head);
+
+	spin_lock_irqsave(&chan->lock, flags);
+	list_for_each_entry_safe(desc, tmp, &chan->done, node)
+		if (async_tx_test_ack(&desc->async_tx) && desc->user_wait) {
+			list_move(&desc->node, &head);
+			desc->user_wait = false;
+		}
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	list_for_each_entry_safe(desc, tmp, &head, node) {
+		list_del(&desc->node);
+		nbpf_desc_put(desc);
+	}
+}
+
+/*
+ * We have to allocate descriptors with the channel lock dropped. This means,
+ * before we re-acquire the lock buffers can be taken already, so we have to
+ * re-check after re-acquiring the lock and possibly retry, if buffers are gone
+ * again.
+ */
+static struct nbpf_desc *nbpf_desc_get(struct nbpf_channel *chan, size_t len)
+{
+	struct nbpf_desc *desc = NULL;
+	struct nbpf_link_desc *ldesc, *prev = NULL;
+
+	nbpf_scan_acked(chan);
+
+	spin_lock_irq(&chan->lock);
+
+	do {
+		int i = 0, ret;
+
+		if (list_empty(&chan->free)) {
+			/* No more free descriptors */
+			spin_unlock_irq(&chan->lock);
+			ret = nbpf_desc_page_alloc(chan);
+			if (ret < 0)
+				return NULL;
+			spin_lock_irq(&chan->lock);
+			continue;
+		}
+		desc = list_first_entry(&chan->free, struct nbpf_desc, node);
+		list_del(&desc->node);
+
+		do {
+			if (list_empty(&chan->free_links)) {
+				/* No more free link descriptors */
+				spin_unlock_irq(&chan->lock);
+				ret = nbpf_desc_page_alloc(chan);
+				if (ret < 0) {
+					nbpf_desc_put(desc);
+					return NULL;
+				}
+				spin_lock_irq(&chan->lock);
+				continue;
+			}
+
+			ldesc = list_first_entry(&chan->free_links,
+						 struct nbpf_link_desc, node);
+			ldesc->desc = desc;
+			if (prev)
+				prev->hwdesc->next = (u32)ldesc->hwdesc_dma_addr;
+
+			prev = ldesc;
+			list_move_tail(&ldesc->node, &desc->sg);
+
+			i++;
+		} while (i < len);
+	} while (!desc);
+
+	prev->hwdesc->next = 0;
+
+	spin_unlock_irq(&chan->lock);
+
+	return desc;
+}
+
+static void nbpf_chan_idle(struct nbpf_channel *chan)
+{
+	struct nbpf_desc *desc, *tmp;
+	unsigned long flags;
+	LIST_HEAD(head);
+
+	spin_lock_irqsave(&chan->lock, flags);
+
+	list_splice_init(&chan->done, &head);
+	list_splice_init(&chan->active, &head);
+	list_splice_init(&chan->queued, &head);
+
+	chan->running = NULL;
+
+	spin_unlock_irqrestore(&chan->lock, flags);
+
+	list_for_each_entry_safe(desc, tmp, &head, node) {
+		dev_dbg(chan->nbpf->dma_dev.dev, "%s(): force-free desc %p cookie %d\n",
+			__func__, desc, desc->async_tx.cookie);
+		list_del(&desc->node);
+		nbpf_desc_put(desc);
+	}
+}
+
+static int nbpf_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
+			unsigned long arg)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	struct dma_slave_config *config;
+
+	dev_dbg(dchan->device->dev, "Entry %s(%d)\n", __func__, cmd);
+
+	switch (cmd) {
+	case DMA_TERMINATE_ALL:
+		dev_dbg(dchan->device->dev, "Terminating\n");
+		nbpf_chan_halt(chan);
+		nbpf_chan_idle(chan);
+		break;
+
+	case DMA_SLAVE_CONFIG:
+		if (!arg)
+			return -EINVAL;
+		config = (struct dma_slave_config *)arg;
+
+		/*
+		 * We could check config->slave_id to match chan->terminal here,
+		 * but with DT they would be coming from the same source, so
+		 * such a check would be superflous
+		 */
+
+		chan->slave_dst_addr = config->dst_addr;
+		chan->slave_dst_width = nbpf_xfer_size(chan->nbpf,
+						       config->dst_addr_width, 1);
+		chan->slave_dst_burst = nbpf_xfer_size(chan->nbpf,
+						       config->dst_addr_width,
+						       config->dst_maxburst);
+		chan->slave_src_addr = config->src_addr;
+		chan->slave_src_width = nbpf_xfer_size(chan->nbpf,
+						       config->src_addr_width, 1);
+		chan->slave_src_burst = nbpf_xfer_size(chan->nbpf,
+						       config->src_addr_width,
+						       config->src_maxburst);
+		break;
+
+	case DMA_PAUSE:
+		chan->paused = true;
+		nbpf_pause(chan);
+		break;
+
+	default:
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static struct dma_async_tx_descriptor *nbpf_prep_sg(struct nbpf_channel *chan,
+		struct scatterlist *src_sg, struct scatterlist *dst_sg,
+		size_t len, enum dma_transfer_direction direction,
+		unsigned long flags)
+{
+	struct nbpf_link_desc *ldesc;
+	struct scatterlist *mem_sg;
+	struct nbpf_desc *desc;
+	bool inc_src, inc_dst;
+	size_t data_len = 0;
+	int i = 0;
+
+	switch (direction) {
+	case DMA_DEV_TO_MEM:
+		mem_sg = dst_sg;
+		inc_src = false;
+		inc_dst = true;
+		break;
+
+	case DMA_MEM_TO_DEV:
+		mem_sg = src_sg;
+		inc_src = true;
+		inc_dst = false;
+		break;
+
+	default:
+	case DMA_MEM_TO_MEM:
+		mem_sg = src_sg;
+		inc_src = true;
+		inc_dst = true;
+	}
+
+	desc = nbpf_desc_get(chan, len);
+	if (!desc)
+		return NULL;
+
+	desc->async_tx.flags = flags;
+	desc->async_tx.cookie = -EBUSY;
+	desc->user_wait = false;
+
+	/*
+	 * This is a private descriptor list, and we own the descriptor. No need
+	 * to lock.
+	 */
+	list_for_each_entry(ldesc, &desc->sg, node) {
+		int ret = nbpf_prep_one(ldesc, direction,
+					sg_dma_address(src_sg),
+					sg_dma_address(dst_sg),
+					sg_dma_len(mem_sg),
+					i == len - 1);
+		if (ret < 0) {
+			nbpf_desc_put(desc);
+			return NULL;
+		}
+		data_len += sg_dma_len(mem_sg);
+		if (inc_src)
+			src_sg = sg_next(src_sg);
+		if (inc_dst)
+			dst_sg = sg_next(dst_sg);
+		mem_sg = direction == DMA_DEV_TO_MEM ? dst_sg : src_sg;
+		i++;
+	}
+
+	desc->length = data_len;
+
+	/* The user has to return the descriptor to us ASAP via .tx_submit() */
+	return &desc->async_tx;
+}
+
+static struct dma_async_tx_descriptor *nbpf_prep_memcpy(
+	struct dma_chan *dchan, dma_addr_t dst, dma_addr_t src,
+	size_t len, unsigned long flags)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	struct scatterlist dst_sg;
+	struct scatterlist src_sg;
+
+	sg_init_table(&dst_sg, 1);
+	sg_init_table(&src_sg, 1);
+
+	sg_dma_address(&dst_sg) = dst;
+	sg_dma_address(&src_sg) = src;
+
+	sg_dma_len(&dst_sg) = len;
+	sg_dma_len(&src_sg) = len;
+
+	dev_dbg(dchan->device->dev, "%s(): %zu @ %pad -> %pad\n",
+		__func__, len, &src, &dst);
+
+	return nbpf_prep_sg(chan, &src_sg, &dst_sg, 1,
+			    DMA_MEM_TO_MEM, flags);
+}
+
+static struct dma_async_tx_descriptor *nbpf_prep_memcpy_sg(
+	struct dma_chan *dchan,
+	struct scatterlist *dst_sg, unsigned int dst_nents,
+	struct scatterlist *src_sg, unsigned int src_nents,
+	unsigned long flags)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+
+	if (dst_nents != src_nents)
+		return NULL;
+
+	return nbpf_prep_sg(chan, src_sg, dst_sg, src_nents,
+			    DMA_MEM_TO_MEM, flags);
+}
+
+static struct dma_async_tx_descriptor *nbpf_prep_slave_sg(
+	struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
+	enum dma_transfer_direction direction, unsigned long flags, void *context)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	struct scatterlist slave_sg;
+
+	dev_dbg(dchan->device->dev, "Entry %s()\n", __func__);
+
+	sg_init_table(&slave_sg, 1);
+
+	switch (direction) {
+	case DMA_MEM_TO_DEV:
+		sg_dma_address(&slave_sg) = chan->slave_dst_addr;
+		return nbpf_prep_sg(chan, sgl, &slave_sg, sg_len,
+				    direction, flags);
+
+	case DMA_DEV_TO_MEM:
+		sg_dma_address(&slave_sg) = chan->slave_src_addr;
+		return nbpf_prep_sg(chan, &slave_sg, sgl, sg_len,
+				    direction, flags);
+
+	default:
+		return NULL;
+	}
+}
+
+static int nbpf_alloc_chan_resources(struct dma_chan *dchan)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	int ret;
+
+	INIT_LIST_HEAD(&chan->free);
+	INIT_LIST_HEAD(&chan->free_links);
+	INIT_LIST_HEAD(&chan->queued);
+	INIT_LIST_HEAD(&chan->active);
+	INIT_LIST_HEAD(&chan->done);
+
+	ret = nbpf_desc_page_alloc(chan);
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(dchan->device->dev, "Entry %s(): terminal %u\n", __func__,
+		chan->terminal);
+
+	nbpf_chan_configure(chan);
+
+	return ret;
+}
+
+static void nbpf_free_chan_resources(struct dma_chan *dchan)
+{
+	struct nbpf_channel *chan = nbpf_to_chan(dchan);
+	struct nbpf_desc_page *dpage, *tmp;
+
+	dev_dbg(dchan->device->dev, "Entry %s()\n", __func__);
+
+	nbpf_chan_halt(chan);
+	nbpf_chan_idle(chan);
+	/* Clean up for if a channel is re-used for MEMCPY after slave DMA */
+	nbpf_chan_prepare_default(chan);
+
+	list_for_each_entry_safe(dpage, tmp, &chan->desc_page, node) {
+		struct nbpf_link_desc *ldesc;
+		int i;
+		list_del(&dpage->node);
+		for (i = 0, ldesc = dpage->ldesc;
+		     i < ARRAY_SIZE(dpage->ldesc);
+		     i++, ldesc++)
+			dma_unmap_single(dchan->device->dev, ldesc->hwdesc_dma_addr,
+					 sizeof(*ldesc->hwdesc), DMA_TO_DEVICE);
+		free_page((unsigned long)dpage);
+	}
+}
+
+static int nbpf_slave_caps(struct dma_chan *dchan,
+			   struct dma_slave_caps *caps)
+{
+	caps->src_addr_widths = NBPF_DMA_BUSWIDTHS;
+	caps->dstn_addr_widths = NBPF_DMA_BUSWIDTHS;
+	caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+	caps->cmd_pause = false;
+	caps->cmd_terminate = true;
+
+	return 0;
+}
+
+static struct dma_chan *nbpf_of_xlate(struct of_phandle_args *dma_spec,
+				      struct of_dma *ofdma)
+{
+	struct nbpf_device *nbpf = ofdma->of_dma_data;
+	struct dma_chan *dchan;
+	struct nbpf_channel *chan;
+
+	if (dma_spec->args_count != 2)
+		return NULL;
+
+	dchan = dma_get_any_slave_channel(&nbpf->dma_dev);
+	if (!dchan)
+		return NULL;
+
+	dev_dbg(dchan->device->dev, "Entry %s(%s)\n", __func__,
+		dma_spec->np->name);
+
+	chan = nbpf_to_chan(dchan);
+
+	chan->terminal = dma_spec->args[0];
+	chan->flags = dma_spec->args[1];
+
+	nbpf_chan_prepare(chan);
+	nbpf_chan_configure(chan);
+
+	return dchan;
+}
+
+static void nbpf_chan_tasklet(unsigned long data)
+{
+	struct nbpf_channel *chan = (struct nbpf_channel *)data;
+	struct nbpf_desc *desc, *tmp;
+	dma_async_tx_callback callback;
+	void *param;
+
+	while (!list_empty(&chan->done)) {
+		bool found = false, must_put, recycling = false;
+
+		spin_lock_irq(&chan->lock);
+
+		list_for_each_entry_safe(desc, tmp, &chan->done, node) {
+			if (!desc->user_wait) {
+				/* Newly completed descriptor, have to process */
+				found = true;
+				break;
+			} else if (async_tx_test_ack(&desc->async_tx)) {
+				/*
+				 * This descriptor was waiting for a user ACK,
+				 * it can be recycled now.
+				 */
+				list_del(&desc->node);
+				spin_unlock_irq(&chan->lock);
+				nbpf_desc_put(desc);
+				recycling = true;
+				break;
+			}
+		}
+
+		if (recycling)
+			continue;
+
+		if (!found) {
+			/* This can happen if TERMINATE_ALL has been called */
+			spin_unlock_irq(&chan->lock);
+			break;
+		}
+
+		dma_cookie_complete(&desc->async_tx);
+
+		/*
+		 * With released lock we cannot dereference desc, maybe it's
+		 * still on the "done" list
+		 */
+		if (async_tx_test_ack(&desc->async_tx)) {
+			list_del(&desc->node);
+			must_put = true;
+		} else {
+			desc->user_wait = true;
+			must_put = false;
+		}
+
+		callback = desc->async_tx.callback;
+		param = desc->async_tx.callback_param;
+
+		/* ack and callback completed descriptor */
+		spin_unlock_irq(&chan->lock);
+
+		if (callback)
+			callback(param);
+
+		if (must_put)
+			nbpf_desc_put(desc);
+	}
+}
+
+static irqreturn_t nbpf_chan_irq(int irq, void *dev)
+{
+	struct nbpf_channel *chan = dev;
+	bool done = nbpf_status_get(chan);
+	struct nbpf_desc *desc;
+	irqreturn_t ret;
+	bool bh = false;
+
+	if (!done)
+		return IRQ_NONE;
+
+	nbpf_status_ack(chan);
+
+	dev_dbg(&chan->dma_chan.dev->device, "%s()\n", __func__);
+
+	spin_lock(&chan->lock);
+	desc = chan->running;
+	if (WARN_ON(!desc)) {
+		ret = IRQ_NONE;
+		goto unlock;
+	} else {
+		ret = IRQ_HANDLED;
+		bh = true;
+	}
+
+	list_move_tail(&desc->node, &chan->done);
+	chan->running = NULL;
+
+	if (!list_empty(&chan->active)) {
+		desc = list_first_entry(&chan->active,
+					struct nbpf_desc, node);
+		if (!nbpf_start(desc))
+			chan->running = desc;
+	}
+
+unlock:
+	spin_unlock(&chan->lock);
+
+	if (bh)
+		tasklet_schedule(&chan->tasklet);
+
+	return ret;
+}
+
+static irqreturn_t nbpf_err_irq(int irq, void *dev)
+{
+	struct nbpf_device *nbpf = dev;
+	u32 error = nbpf_error_get(nbpf);
+
+	dev_warn(nbpf->dma_dev.dev, "DMA error IRQ %u\n", irq);
+
+	if (!error)
+		return IRQ_NONE;
+
+	do {
+		struct nbpf_channel *chan = nbpf_error_get_channel(nbpf, error);
+		/* On error: abort all queued transfers, no callback */
+		nbpf_error_clear(chan);
+		nbpf_chan_idle(chan);
+		error = nbpf_error_get(nbpf);
+	} while (error);
+
+	return IRQ_HANDLED;
+}
+
+static int nbpf_chan_probe(struct nbpf_device *nbpf, int n)
+{
+	struct dma_device *dma_dev = &nbpf->dma_dev;
+	struct nbpf_channel *chan = nbpf->chan + n;
+	int ret;
+
+	chan->nbpf = nbpf;
+	chan->base = nbpf->base + NBPF_REG_CHAN_OFFSET + NBPF_REG_CHAN_SIZE * n;
+	INIT_LIST_HEAD(&chan->desc_page);
+	spin_lock_init(&chan->lock);
+	chan->dma_chan.device = dma_dev;
+	dma_cookie_init(&chan->dma_chan);
+	nbpf_chan_prepare_default(chan);
+
+	dev_dbg(dma_dev->dev, "%s(): channel %d: -> %p\n", __func__, n, chan->base);
+
+	snprintf(chan->name, sizeof(chan->name), "nbpf %d", n);
+
+	tasklet_init(&chan->tasklet, nbpf_chan_tasklet, (unsigned long)chan);
+	ret = devm_request_irq(dma_dev->dev, chan->irq,
+			nbpf_chan_irq, IRQF_SHARED,
+			chan->name, chan);
+	if (ret < 0)
+		return ret;
+
+	/* Add the channel to DMA device channel list */
+	list_add_tail(&chan->dma_chan.device_node,
+		      &dma_dev->channels);
+
+	return 0;
+}
+
+static const struct of_device_id nbpf_match[] = {
+	{.compatible = "renesas,nbpfaxi64dmac1b4",	.data = &nbpf_cfg[NBPF1B4]},
+	{.compatible = "renesas,nbpfaxi64dmac1b8",	.data = &nbpf_cfg[NBPF1B8]},
+	{.compatible = "renesas,nbpfaxi64dmac1b16",	.data = &nbpf_cfg[NBPF1B16]},
+	{.compatible = "renesas,nbpfaxi64dmac4b4",	.data = &nbpf_cfg[NBPF4B4]},
+	{.compatible = "renesas,nbpfaxi64dmac4b8",	.data = &nbpf_cfg[NBPF4B8]},
+	{.compatible = "renesas,nbpfaxi64dmac4b16",	.data = &nbpf_cfg[NBPF4B16]},
+	{.compatible = "renesas,nbpfaxi64dmac8b4",	.data = &nbpf_cfg[NBPF8B4]},
+	{.compatible = "renesas,nbpfaxi64dmac8b8",	.data = &nbpf_cfg[NBPF8B8]},
+	{.compatible = "renesas,nbpfaxi64dmac8b16",	.data = &nbpf_cfg[NBPF8B16]},
+	{}
+};
+MODULE_DEVICE_TABLE(of, nbpf_match);
+
+static int nbpf_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *of_id = of_match_device(nbpf_match, dev);
+	struct device_node *np = dev->of_node;
+	struct nbpf_device *nbpf;
+	struct dma_device *dma_dev;
+	struct resource *iomem, *irq_res;
+	const struct nbpf_config *cfg;
+	int num_channels;
+	int ret, irq, eirq, i;
+	int irqbuf[9] /* maximum 8 channels + error IRQ */;
+	unsigned int irqs = 0;
+
+	BUILD_BUG_ON(sizeof(struct nbpf_desc_page) > PAGE_SIZE);
+
+	/* DT only */
+	if (!np || !of_id || !of_id->data)
+		return -ENODEV;
+
+	cfg = of_id->data;
+	num_channels = cfg->num_channels;
+
+	nbpf = devm_kzalloc(dev, sizeof(*nbpf) + num_channels *
+			    sizeof(nbpf->chan[0]), GFP_KERNEL);
+	if (!nbpf) {
+		dev_err(dev, "Memory allocation failed\n");
+		return -ENOMEM;
+	}
+	dma_dev = &nbpf->dma_dev;
+	dma_dev->dev = dev;
+
+	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	nbpf->base = devm_ioremap_resource(dev, iomem);
+	if (IS_ERR(nbpf->base))
+		return PTR_ERR(nbpf->base);
+
+	nbpf->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(nbpf->clk))
+		return PTR_ERR(nbpf->clk);
+
+	nbpf->config = cfg;
+
+	for (i = 0; irqs < ARRAY_SIZE(irqbuf); i++) {
+		irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
+		if (!irq_res)
+			break;
+
+		for (irq = irq_res->start; irq <= irq_res->end;
+		     irq++, irqs++)
+			irqbuf[irqs] = irq;
+	}
+
+	/*
+	 * 3 IRQ resource schemes are supported:
+	 * 1. 1 shared IRQ for error and all channels
+	 * 2. 2 IRQs: one for error and one shared for all channels
+	 * 3. 1 IRQ for error and an own IRQ for each channel
+	 */
+	if (irqs != 1 && irqs != 2 && irqs != num_channels + 1)
+		return -ENXIO;
+
+	if (irqs == 1) {
+		eirq = irqbuf[0];
+
+		for (i = 0; i <= num_channels; i++)
+			nbpf->chan[i].irq = irqbuf[0];
+	} else {
+		eirq = platform_get_irq_byname(pdev, "error");
+		if (eirq < 0)
+			return eirq;
+
+		if (irqs == num_channels + 1) {
+			struct nbpf_channel *chan;
+
+			for (i = 0, chan = nbpf->chan; i <= num_channels;
+			     i++, chan++) {
+				/* Skip the error IRQ */
+				if (irqbuf[i] == eirq)
+					i++;
+				chan->irq = irqbuf[i];
+			}
+
+			if (chan != nbpf->chan + num_channels)
+				return -EINVAL;
+		} else {
+			/* 2 IRQs and more than one channel */
+			if (irqbuf[0] == eirq)
+				irq = irqbuf[1];
+			else
+				irq = irqbuf[0];
+
+			for (i = 0; i <= num_channels; i++)
+				nbpf->chan[i].irq = irq;
+		}
+	}
+
+	ret = devm_request_irq(dev, eirq, nbpf_err_irq,
+			       IRQF_SHARED, "dma error", nbpf);
+	if (ret < 0)
+		return ret;
+
+	INIT_LIST_HEAD(&dma_dev->channels);
+
+	/* Create DMA Channel */
+	for (i = 0; i < num_channels; i++) {
+		ret = nbpf_chan_probe(nbpf, i);
+		if (ret < 0)
+			return ret;
+	}
+
+	dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
+	dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
+	dma_cap_set(DMA_PRIVATE, dma_dev->cap_mask);
+	dma_cap_set(DMA_SG, dma_dev->cap_mask);
+
+	/* Common and MEMCPY operations */
+	dma_dev->device_alloc_chan_resources
+		= nbpf_alloc_chan_resources;
+	dma_dev->device_free_chan_resources = nbpf_free_chan_resources;
+	dma_dev->device_prep_dma_sg = nbpf_prep_memcpy_sg;
+	dma_dev->device_prep_dma_memcpy = nbpf_prep_memcpy;
+	dma_dev->device_tx_status = nbpf_tx_status;
+	dma_dev->device_issue_pending = nbpf_issue_pending;
+	dma_dev->device_slave_caps = nbpf_slave_caps;
+
+	/*
+	 * If we drop support for unaligned MEMCPY buffer addresses and / or
+	 * lengths by setting
+	 * dma_dev->copy_align = 4;
+	 * then we can set transfer length to 4 bytes in nbpf_prep_one() for
+	 * DMA_MEM_TO_MEM
+	 */
+
+	/* Compulsory for DMA_SLAVE fields */
+	dma_dev->device_prep_slave_sg = nbpf_prep_slave_sg;
+	dma_dev->device_control = nbpf_control;
+
+	platform_set_drvdata(pdev, nbpf);
+
+	ret = clk_prepare_enable(nbpf->clk);
+	if (ret < 0)
+		return ret;
+
+	nbpf_configure(nbpf);
+
+	ret = dma_async_device_register(dma_dev);
+	if (ret < 0)
+		goto e_clk_off;
+
+	ret = of_dma_controller_register(np, nbpf_of_xlate, nbpf);
+	if (ret < 0)
+		goto e_dma_dev_unreg;
+
+	return 0;
+
+e_dma_dev_unreg:
+	dma_async_device_unregister(dma_dev);
+e_clk_off:
+	clk_disable_unprepare(nbpf->clk);
+
+	return ret;
+}
+
+static int nbpf_remove(struct platform_device *pdev)
+{
+	struct nbpf_device *nbpf = platform_get_drvdata(pdev);
+
+	of_dma_controller_free(pdev->dev.of_node);
+	dma_async_device_unregister(&nbpf->dma_dev);
+	clk_disable_unprepare(nbpf->clk);
+
+	return 0;
+}
+
+static struct platform_device_id nbpf_ids[] = {
+	{"nbpfaxi64dmac1b4",	(kernel_ulong_t)&nbpf_cfg[NBPF1B4]},
+	{"nbpfaxi64dmac1b8",	(kernel_ulong_t)&nbpf_cfg[NBPF1B8]},
+	{"nbpfaxi64dmac1b16",	(kernel_ulong_t)&nbpf_cfg[NBPF1B16]},
+	{"nbpfaxi64dmac4b4",	(kernel_ulong_t)&nbpf_cfg[NBPF4B4]},
+	{"nbpfaxi64dmac4b8",	(kernel_ulong_t)&nbpf_cfg[NBPF4B8]},
+	{"nbpfaxi64dmac4b16",	(kernel_ulong_t)&nbpf_cfg[NBPF4B16]},
+	{"nbpfaxi64dmac8b4",	(kernel_ulong_t)&nbpf_cfg[NBPF8B4]},
+	{"nbpfaxi64dmac8b8",	(kernel_ulong_t)&nbpf_cfg[NBPF8B8]},
+	{"nbpfaxi64dmac8b16",	(kernel_ulong_t)&nbpf_cfg[NBPF8B16]},
+	{},
+};
+MODULE_DEVICE_TABLE(platform, nbpf_ids);
+
+#ifdef CONFIG_PM_RUNTIME
+static int nbpf_runtime_suspend(struct device *dev)
+{
+	struct nbpf_device *nbpf = platform_get_drvdata(to_platform_device(dev));
+	clk_disable_unprepare(nbpf->clk);
+	return 0;
+}
+
+static int nbpf_runtime_resume(struct device *dev)
+{
+	struct nbpf_device *nbpf = platform_get_drvdata(to_platform_device(dev));
+	return clk_prepare_enable(nbpf->clk);
+}
+#endif
+
+static const struct dev_pm_ops nbpf_pm_ops = {
+	SET_RUNTIME_PM_OPS(nbpf_runtime_suspend, nbpf_runtime_resume, NULL)
+};
+
+static struct platform_driver nbpf_driver = {
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = "dma-nbpf",
+		.of_match_table = nbpf_match,
+		.pm = &nbpf_pm_ops,
+	},
+	.id_table = nbpf_ids,
+	.probe = nbpf_probe,
+	.remove = nbpf_remove,
+};
+
+module_platform_driver(nbpf_driver);
+
+MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
+MODULE_DESCRIPTION("dmaengine driver for NBPFAXI64* DMACs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index e8fe9dc..d5fbeaa 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -218,3 +218,38 @@
 			&dma_spec->args[0]);
 }
 EXPORT_SYMBOL_GPL(of_dma_simple_xlate);
+
+/**
+ * of_dma_xlate_by_chan_id - Translate dt property to DMA channel by channel id
+ * @dma_spec:	pointer to DMA specifier as found in the device tree
+ * @of_dma:	pointer to DMA controller data
+ *
+ * This function can be used as the of xlate callback for DMA driver which wants
+ * to match the channel based on the channel id. When using this xlate function
+ * the #dma-cells propety of the DMA controller dt node needs to be set to 1.
+ * The data parameter of of_dma_controller_register must be a pointer to the
+ * dma_device struct the function should match upon.
+ *
+ * Returns pointer to appropriate dma channel on success or NULL on error.
+ */
+struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
+					 struct of_dma *ofdma)
+{
+	struct dma_device *dev = ofdma->of_dma_data;
+	struct dma_chan *chan, *candidate = NULL;
+
+	if (!dev || dma_spec->args_count != 1)
+		return NULL;
+
+	list_for_each_entry(chan, &dev->channels, device_node)
+		if (chan->chan_id == dma_spec->args[0]) {
+			candidate = chan;
+			break;
+		}
+
+	if (!candidate)
+		return NULL;
+
+	return dma_get_slave_channel(candidate);
+}
+EXPORT_SYMBOL_GPL(of_dma_xlate_by_chan_id);
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index b19f04f..4cf7d9a 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -853,8 +853,7 @@
 
 static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
-	size_t period_len, enum dma_transfer_direction dir, unsigned long flags,
-	void *context)
+	size_t period_len, enum dma_transfer_direction dir, unsigned long flags)
 {
 	struct omap_dmadev *od = to_omap_dma_dev(chan->device);
 	struct omap_chan *c = to_omap_dma_chan(chan);
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 73fa9b7..d5149aa 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -33,26 +33,15 @@
 #define PL330_MAX_IRQS		32
 #define PL330_MAX_PERI		32
 
-enum pl330_srccachectrl {
-	SCCTRL0,	/* Noncacheable and nonbufferable */
-	SCCTRL1,	/* Bufferable only */
-	SCCTRL2,	/* Cacheable, but do not allocate */
-	SCCTRL3,	/* Cacheable and bufferable, but do not allocate */
-	SINVALID1,
-	SINVALID2,
-	SCCTRL6,	/* Cacheable write-through, allocate on reads only */
-	SCCTRL7,	/* Cacheable write-back, allocate on reads only */
-};
-
-enum pl330_dstcachectrl {
-	DCCTRL0,	/* Noncacheable and nonbufferable */
-	DCCTRL1,	/* Bufferable only */
-	DCCTRL2,	/* Cacheable, but do not allocate */
-	DCCTRL3,	/* Cacheable and bufferable, but do not allocate */
-	DINVALID1,	/* AWCACHE = 0x1000 */
-	DINVALID2,
-	DCCTRL6,	/* Cacheable write-through, allocate on writes only */
-	DCCTRL7,	/* Cacheable write-back, allocate on writes only */
+enum pl330_cachectrl {
+	CCTRL0,		/* Noncacheable and nonbufferable */
+	CCTRL1,		/* Bufferable only */
+	CCTRL2,		/* Cacheable, but do not allocate */
+	CCTRL3,		/* Cacheable and bufferable, but do not allocate */
+	INVALID1,	/* AWCACHE = 0x1000 */
+	INVALID2,
+	CCTRL6,		/* Cacheable write-through, allocate on writes only */
+	CCTRL7,		/* Cacheable write-back, allocate on writes only */
 };
 
 enum pl330_byteswap {
@@ -63,13 +52,6 @@
 	SWAP_16,
 };
 
-enum pl330_reqtype {
-	MEMTOMEM,
-	MEMTODEV,
-	DEVTOMEM,
-	DEVTODEV,
-};
-
 /* Register and Bit field Definitions */
 #define DS			0x0
 #define DS_ST_STOP		0x0
@@ -263,9 +245,6 @@
  */
 #define MCODE_BUFF_PER_REQ	256
 
-/* If the _pl330_req is available to the client */
-#define IS_FREE(req)	(*((u8 *)((req)->mc_cpu)) == CMD_DMAEND)
-
 /* Use this _only_ to wait on transient states */
 #define UNTIL(t, s)	while (!(_state(t) & (s))) cpu_relax();
 
@@ -300,27 +279,6 @@
 	u32		irq_ns;
 };
 
-/* Handle to the DMAC provided to the PL330 core */
-struct pl330_info {
-	/* Owning device */
-	struct device *dev;
-	/* Size of MicroCode buffers for each channel. */
-	unsigned mcbufsz;
-	/* ioremap'ed address of PL330 registers. */
-	void __iomem	*base;
-	/* Client can freely use it. */
-	void	*client_data;
-	/* PL330 core data, Client must not touch it. */
-	void	*pl330_data;
-	/* Populated by the PL330 core driver during pl330_add */
-	struct pl330_config	pcfg;
-	/*
-	 * If the DMAC has some reset mechanism, then the
-	 * client may want to provide pointer to the method.
-	 */
-	void (*dmac_reset)(struct pl330_info *pi);
-};
-
 /**
  * Request Configuration.
  * The PL330 core does not modify this and uses the last
@@ -344,8 +302,8 @@
 	unsigned brst_len:5;
 	unsigned brst_size:3; /* in power of 2 */
 
-	enum pl330_dstcachectrl dcctl;
-	enum pl330_srccachectrl scctl;
+	enum pl330_cachectrl dcctl;
+	enum pl330_cachectrl scctl;
 	enum pl330_byteswap swap;
 	struct pl330_config *pcfg;
 };
@@ -359,11 +317,6 @@
 	u32 dst_addr;
 	/* Size to xfer */
 	u32 bytes;
-	/*
-	 * Pointer to next xfer in the list.
-	 * The last xfer in the req must point to NULL.
-	 */
-	struct pl330_xfer *next;
 };
 
 /* The xfer callbacks are made with one of these arguments. */
@@ -376,67 +329,6 @@
 	PL330_ERR_FAIL,
 };
 
-/* A request defining Scatter-Gather List ending with NULL xfer. */
-struct pl330_req {
-	enum pl330_reqtype rqtype;
-	/* Index of peripheral for the xfer. */
-	unsigned peri:5;
-	/* Unique token for this xfer, set by the client. */
-	void *token;
-	/* Callback to be called after xfer. */
-	void (*xfer_cb)(void *token, enum pl330_op_err err);
-	/* If NULL, req will be done at last set parameters. */
-	struct pl330_reqcfg *cfg;
-	/* Pointer to first xfer in the request. */
-	struct pl330_xfer *x;
-	/* Hook to attach to DMAC's list of reqs with due callback */
-	struct list_head rqd;
-};
-
-/*
- * To know the status of the channel and DMAC, the client
- * provides a pointer to this structure. The PL330 core
- * fills it with current information.
- */
-struct pl330_chanstatus {
-	/*
-	 * If the DMAC engine halted due to some error,
-	 * the client should remove-add DMAC.
-	 */
-	bool dmac_halted;
-	/*
-	 * If channel is halted due to some error,
-	 * the client should ABORT/FLUSH and START the channel.
-	 */
-	bool faulting;
-	/* Location of last load */
-	u32 src_addr;
-	/* Location of last store */
-	u32 dst_addr;
-	/*
-	 * Pointer to the currently active req, NULL if channel is
-	 * inactive, even though the requests may be present.
-	 */
-	struct pl330_req *top_req;
-	/* Pointer to req waiting second in the queue if any. */
-	struct pl330_req *wait_req;
-};
-
-enum pl330_chan_op {
-	/* Start the channel */
-	PL330_OP_START,
-	/* Abort the active xfer */
-	PL330_OP_ABORT,
-	/* Stop xfer and flush queue */
-	PL330_OP_FLUSH,
-};
-
-struct _xfer_spec {
-	u32 ccr;
-	struct pl330_req *r;
-	struct pl330_xfer *x;
-};
-
 enum dmamov_dst {
 	SAR = 0,
 	CCR,
@@ -454,12 +346,12 @@
 	ALWAYS,
 };
 
+struct dma_pl330_desc;
+
 struct _pl330_req {
 	u32 mc_bus;
 	void *mc_cpu;
-	/* Number of bytes taken to setup MC for the req */
-	u32 mc_len;
-	struct pl330_req *r;
+	struct dma_pl330_desc *desc;
 };
 
 /* ToBeDone for tasklet */
@@ -491,30 +383,6 @@
 	DYING,
 };
 
-/* A DMAC */
-struct pl330_dmac {
-	spinlock_t		lock;
-	/* Holds list of reqs with due callbacks */
-	struct list_head	req_done;
-	/* Pointer to platform specific stuff */
-	struct pl330_info	*pinfo;
-	/* Maximum possible events/irqs */
-	int			events[32];
-	/* BUS address of MicroCode buffer */
-	dma_addr_t		mcode_bus;
-	/* CPU address of MicroCode buffer */
-	void			*mcode_cpu;
-	/* List of all Channel threads */
-	struct pl330_thread	*channels;
-	/* Pointer to the MANAGER thread */
-	struct pl330_thread	*manager;
-	/* To handle bad news in interrupt */
-	struct tasklet_struct	tasks;
-	struct _pl330_tbd	dmac_tbd;
-	/* State of DMAC operation */
-	enum pl330_dmac_state	state;
-};
-
 enum desc_status {
 	/* In the DMAC pool */
 	FREE,
@@ -555,15 +423,16 @@
 	 * As the parent, this DMAC also provides descriptors
 	 * to the channel.
 	 */
-	struct dma_pl330_dmac *dmac;
+	struct pl330_dmac *dmac;
 
 	/* To protect channel manipulation */
 	spinlock_t lock;
 
-	/* Token of a hardware channel thread of PL330 DMAC
-	 * NULL if the channel is available to be acquired.
+	/*
+	 * Hardware channel thread of PL330 DMAC. NULL if the channel is
+	 * available.
 	 */
-	void *pl330_chid;
+	struct pl330_thread *thread;
 
 	/* For D-to-M and M-to-D channels */
 	int burst_sz; /* the peripheral fifo width */
@@ -574,9 +443,7 @@
 	bool cyclic;
 };
 
-struct dma_pl330_dmac {
-	struct pl330_info pif;
-
+struct pl330_dmac {
 	/* DMA-Engine Device */
 	struct dma_device ddma;
 
@@ -588,6 +455,32 @@
 	/* To protect desc_pool manipulation */
 	spinlock_t pool_lock;
 
+	/* Size of MicroCode buffers for each channel. */
+	unsigned mcbufsz;
+	/* ioremap'ed address of PL330 registers. */
+	void __iomem	*base;
+	/* Populated by the PL330 core driver during pl330_add */
+	struct pl330_config	pcfg;
+
+	spinlock_t		lock;
+	/* Maximum possible events/irqs */
+	int			events[32];
+	/* BUS address of MicroCode buffer */
+	dma_addr_t		mcode_bus;
+	/* CPU address of MicroCode buffer */
+	void			*mcode_cpu;
+	/* List of all Channel threads */
+	struct pl330_thread	*channels;
+	/* Pointer to the MANAGER thread */
+	struct pl330_thread	*manager;
+	/* To handle bad news in interrupt */
+	struct tasklet_struct	tasks;
+	struct _pl330_tbd	dmac_tbd;
+	/* State of DMAC operation */
+	enum pl330_dmac_state	state;
+	/* Holds list of reqs with due callbacks */
+	struct list_head        req_done;
+
 	/* Peripheral channels connected to this DMAC */
 	unsigned int num_peripherals;
 	struct dma_pl330_chan *peripherals; /* keep at end */
@@ -604,49 +497,43 @@
 	struct pl330_xfer px;
 
 	struct pl330_reqcfg rqcfg;
-	struct pl330_req req;
 
 	enum desc_status status;
 
 	/* The channel which currently holds this desc */
 	struct dma_pl330_chan *pchan;
+
+	enum dma_transfer_direction rqtype;
+	/* Index of peripheral for the xfer. */
+	unsigned peri:5;
+	/* Hook to attach to DMAC's list of reqs with due callback */
+	struct list_head rqd;
 };
 
-static inline void _callback(struct pl330_req *r, enum pl330_op_err err)
-{
-	if (r && r->xfer_cb)
-		r->xfer_cb(r->token, err);
-}
+struct _xfer_spec {
+	u32 ccr;
+	struct dma_pl330_desc *desc;
+};
 
 static inline bool _queue_empty(struct pl330_thread *thrd)
 {
-	return (IS_FREE(&thrd->req[0]) && IS_FREE(&thrd->req[1]))
-		? true : false;
+	return thrd->req[0].desc == NULL && thrd->req[1].desc == NULL;
 }
 
 static inline bool _queue_full(struct pl330_thread *thrd)
 {
-	return (IS_FREE(&thrd->req[0]) || IS_FREE(&thrd->req[1]))
-		? false : true;
+	return thrd->req[0].desc != NULL && thrd->req[1].desc != NULL;
 }
 
 static inline bool is_manager(struct pl330_thread *thrd)
 {
-	struct pl330_dmac *pl330 = thrd->dmac;
-
-	/* MANAGER is indexed at the end */
-	if (thrd->id == pl330->pinfo->pcfg.num_chan)
-		return true;
-	else
-		return false;
+	return thrd->dmac->manager == thrd;
 }
 
 /* If manager of the thread is in Non-Secure mode */
 static inline bool _manager_ns(struct pl330_thread *thrd)
 {
-	struct pl330_dmac *pl330 = thrd->dmac;
-
-	return (pl330->pinfo->pcfg.mode & DMAC_MODE_NS) ? true : false;
+	return (thrd->dmac->pcfg.mode & DMAC_MODE_NS) ? true : false;
 }
 
 static inline u32 get_revision(u32 periph_id)
@@ -1004,7 +891,7 @@
 /* Returns Time-Out */
 static bool _until_dmac_idle(struct pl330_thread *thrd)
 {
-	void __iomem *regs = thrd->dmac->pinfo->base;
+	void __iomem *regs = thrd->dmac->base;
 	unsigned long loops = msecs_to_loops(5);
 
 	do {
@@ -1024,7 +911,7 @@
 static inline void _execute_DBGINSN(struct pl330_thread *thrd,
 		u8 insn[], bool as_manager)
 {
-	void __iomem *regs = thrd->dmac->pinfo->base;
+	void __iomem *regs = thrd->dmac->base;
 	u32 val;
 
 	val = (insn[0] << 16) | (insn[1] << 24);
@@ -1039,7 +926,7 @@
 
 	/* If timed out due to halted state-machine */
 	if (_until_dmac_idle(thrd)) {
-		dev_err(thrd->dmac->pinfo->dev, "DMAC halted!\n");
+		dev_err(thrd->dmac->ddma.dev, "DMAC halted!\n");
 		return;
 	}
 
@@ -1047,25 +934,9 @@
 	writel(0, regs + DBGCMD);
 }
 
-/*
- * Mark a _pl330_req as free.
- * We do it by writing DMAEND as the first instruction
- * because no valid request is going to have DMAEND as
- * its first instruction to execute.
- */
-static void mark_free(struct pl330_thread *thrd, int idx)
-{
-	struct _pl330_req *req = &thrd->req[idx];
-
-	_emit_END(0, req->mc_cpu);
-	req->mc_len = 0;
-
-	thrd->req_running = -1;
-}
-
 static inline u32 _state(struct pl330_thread *thrd)
 {
-	void __iomem *regs = thrd->dmac->pinfo->base;
+	void __iomem *regs = thrd->dmac->base;
 	u32 val;
 
 	if (is_manager(thrd))
@@ -1123,7 +994,7 @@
 
 static void _stop(struct pl330_thread *thrd)
 {
-	void __iomem *regs = thrd->dmac->pinfo->base;
+	void __iomem *regs = thrd->dmac->base;
 	u8 insn[6] = {0, 0, 0, 0, 0, 0};
 
 	if (_state(thrd) == PL330_STATE_FAULT_COMPLETING)
@@ -1146,9 +1017,9 @@
 /* Start doing req 'idx' of thread 'thrd' */
 static bool _trigger(struct pl330_thread *thrd)
 {
-	void __iomem *regs = thrd->dmac->pinfo->base;
+	void __iomem *regs = thrd->dmac->base;
 	struct _pl330_req *req;
-	struct pl330_req *r;
+	struct dma_pl330_desc *desc;
 	struct _arg_GO go;
 	unsigned ns;
 	u8 insn[6] = {0, 0, 0, 0, 0, 0};
@@ -1159,32 +1030,27 @@
 		return true;
 
 	idx = 1 - thrd->lstenq;
-	if (!IS_FREE(&thrd->req[idx]))
+	if (thrd->req[idx].desc != NULL) {
 		req = &thrd->req[idx];
-	else {
+	} else {
 		idx = thrd->lstenq;
-		if (!IS_FREE(&thrd->req[idx]))
+		if (thrd->req[idx].desc != NULL)
 			req = &thrd->req[idx];
 		else
 			req = NULL;
 	}
 
 	/* Return if no request */
-	if (!req || !req->r)
+	if (!req)
 		return true;
 
-	r = req->r;
+	desc = req->desc;
 
-	if (r->cfg)
-		ns = r->cfg->nonsecure ? 1 : 0;
-	else if (readl(regs + CS(thrd->id)) & CS_CNS)
-		ns = 1;
-	else
-		ns = 0;
+	ns = desc->rqcfg.nonsecure ? 1 : 0;
 
 	/* See 'Abort Sources' point-4 at Page 2-25 */
 	if (_manager_ns(thrd) && !ns)
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d Recipe for ABORT!\n",
+		dev_info(thrd->dmac->ddma.dev, "%s:%d Recipe for ABORT!\n",
 			__func__, __LINE__);
 
 	go.chan = thrd->id;
@@ -1240,7 +1106,7 @@
 		const struct _xfer_spec *pxs, int cyc)
 {
 	int off = 0;
-	struct pl330_config *pcfg = pxs->r->cfg->pcfg;
+	struct pl330_config *pcfg = pxs->desc->rqcfg.pcfg;
 
 	/* check lock-up free version */
 	if (get_revision(pcfg->periph_id) >= PERIPH_REV_R1P0) {
@@ -1266,10 +1132,10 @@
 	int off = 0;
 
 	while (cyc--) {
-		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri);
+		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
+		off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
 		off += _emit_ST(dry_run, &buf[off], ALWAYS);
-		off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
+		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
 	}
 
 	return off;
@@ -1281,10 +1147,10 @@
 	int off = 0;
 
 	while (cyc--) {
-		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
+		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
 		off += _emit_LD(dry_run, &buf[off], ALWAYS);
-		off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
+		off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
+		off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
 	}
 
 	return off;
@@ -1295,14 +1161,14 @@
 {
 	int off = 0;
 
-	switch (pxs->r->rqtype) {
-	case MEMTODEV:
+	switch (pxs->desc->rqtype) {
+	case DMA_MEM_TO_DEV:
 		off += _ldst_memtodev(dry_run, &buf[off], pxs, cyc);
 		break;
-	case DEVTOMEM:
+	case DMA_DEV_TO_MEM:
 		off += _ldst_devtomem(dry_run, &buf[off], pxs, cyc);
 		break;
-	case MEMTOMEM:
+	case DMA_MEM_TO_MEM:
 		off += _ldst_memtomem(dry_run, &buf[off], pxs, cyc);
 		break;
 	default:
@@ -1395,7 +1261,7 @@
 static inline int _setup_loops(unsigned dry_run, u8 buf[],
 		const struct _xfer_spec *pxs)
 {
-	struct pl330_xfer *x = pxs->x;
+	struct pl330_xfer *x = &pxs->desc->px;
 	u32 ccr = pxs->ccr;
 	unsigned long c, bursts = BYTE_TO_BURST(x->bytes, ccr);
 	int off = 0;
@@ -1412,7 +1278,7 @@
 static inline int _setup_xfer(unsigned dry_run, u8 buf[],
 		const struct _xfer_spec *pxs)
 {
-	struct pl330_xfer *x = pxs->x;
+	struct pl330_xfer *x = &pxs->desc->px;
 	int off = 0;
 
 	/* DMAMOV SAR, x->src_addr */
@@ -1443,17 +1309,12 @@
 	/* DMAMOV CCR, ccr */
 	off += _emit_MOV(dry_run, &buf[off], CCR, pxs->ccr);
 
-	x = pxs->r->x;
-	do {
-		/* Error if xfer length is not aligned at burst size */
-		if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr)))
-			return -EINVAL;
+	x = &pxs->desc->px;
+	/* Error if xfer length is not aligned at burst size */
+	if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr)))
+		return -EINVAL;
 
-		pxs->x = x;
-		off += _setup_xfer(dry_run, &buf[off], pxs);
-
-		x = x->next;
-	} while (x);
+	off += _setup_xfer(dry_run, &buf[off], pxs);
 
 	/* DMASEV peripheral/event */
 	off += _emit_SEV(dry_run, &buf[off], thrd->ev);
@@ -1495,31 +1356,15 @@
 	return ccr;
 }
 
-static inline bool _is_valid(u32 ccr)
-{
-	enum pl330_dstcachectrl dcctl;
-	enum pl330_srccachectrl scctl;
-
-	dcctl = (ccr >> CC_DSTCCTRL_SHFT) & CC_DRCCCTRL_MASK;
-	scctl = (ccr >> CC_SRCCCTRL_SHFT) & CC_SRCCCTRL_MASK;
-
-	if (dcctl == DINVALID1 || dcctl == DINVALID2
-			|| scctl == SINVALID1 || scctl == SINVALID2)
-		return false;
-	else
-		return true;
-}
-
 /*
  * Submit a list of xfers after which the client wants notification.
  * Client is not notified after each xfer unit, just once after all
  * xfer units are done or some error occurs.
  */
-static int pl330_submit_req(void *ch_id, struct pl330_req *r)
+static int pl330_submit_req(struct pl330_thread *thrd,
+	struct dma_pl330_desc *desc)
 {
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	struct pl330_info *pi;
+	struct pl330_dmac *pl330 = thrd->dmac;
 	struct _xfer_spec xs;
 	unsigned long flags;
 	void __iomem *regs;
@@ -1528,25 +1373,24 @@
 	int ret = 0;
 
 	/* No Req or Unacquired Channel or DMAC */
-	if (!r || !thrd || thrd->free)
+	if (!desc || !thrd || thrd->free)
 		return -EINVAL;
 
-	pl330 = thrd->dmac;
-	pi = pl330->pinfo;
-	regs = pi->base;
+	regs = thrd->dmac->base;
 
 	if (pl330->state == DYING
 		|| pl330->dmac_tbd.reset_chan & (1 << thrd->id)) {
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d\n",
+		dev_info(thrd->dmac->ddma.dev, "%s:%d\n",
 			__func__, __LINE__);
 		return -EAGAIN;
 	}
 
 	/* If request for non-existing peripheral */
-	if (r->rqtype != MEMTOMEM && r->peri >= pi->pcfg.num_peri) {
-		dev_info(thrd->dmac->pinfo->dev,
+	if (desc->rqtype != DMA_MEM_TO_MEM &&
+	    desc->peri >= pl330->pcfg.num_peri) {
+		dev_info(thrd->dmac->ddma.dev,
 				"%s:%d Invalid peripheral(%u)!\n",
-				__func__, __LINE__, r->peri);
+				__func__, __LINE__, desc->peri);
 		return -EINVAL;
 	}
 
@@ -1557,41 +1401,26 @@
 		goto xfer_exit;
 	}
 
+	/* Prefer Secure Channel */
+	if (!_manager_ns(thrd))
+		desc->rqcfg.nonsecure = 0;
+	else
+		desc->rqcfg.nonsecure = 1;
 
-	/* Use last settings, if not provided */
-	if (r->cfg) {
-		/* Prefer Secure Channel */
-		if (!_manager_ns(thrd))
-			r->cfg->nonsecure = 0;
-		else
-			r->cfg->nonsecure = 1;
+	ccr = _prepare_ccr(&desc->rqcfg);
 
-		ccr = _prepare_ccr(r->cfg);
-	} else {
-		ccr = readl(regs + CC(thrd->id));
-	}
-
-	/* If this req doesn't have valid xfer settings */
-	if (!_is_valid(ccr)) {
-		ret = -EINVAL;
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d Invalid CCR(%x)!\n",
-			__func__, __LINE__, ccr);
-		goto xfer_exit;
-	}
-
-	idx = IS_FREE(&thrd->req[0]) ? 0 : 1;
+	idx = thrd->req[0].desc == NULL ? 0 : 1;
 
 	xs.ccr = ccr;
-	xs.r = r;
+	xs.desc = desc;
 
 	/* First dry run to check if req is acceptable */
 	ret = _setup_req(1, thrd, idx, &xs);
 	if (ret < 0)
 		goto xfer_exit;
 
-	if (ret > pi->mcbufsz / 2) {
-		dev_info(thrd->dmac->pinfo->dev,
-			"%s:%d Trying increasing mcbufsz\n",
+	if (ret > pl330->mcbufsz / 2) {
+		dev_info(pl330->ddma.dev, "%s:%d Trying increasing mcbufsz\n",
 				__func__, __LINE__);
 		ret = -ENOMEM;
 		goto xfer_exit;
@@ -1599,8 +1428,8 @@
 
 	/* Hook the request */
 	thrd->lstenq = idx;
-	thrd->req[idx].mc_len = _setup_req(0, thrd, idx, &xs);
-	thrd->req[idx].r = r;
+	thrd->req[idx].desc = desc;
+	_setup_req(0, thrd, idx, &xs);
 
 	ret = 0;
 
@@ -1610,10 +1439,32 @@
 	return ret;
 }
 
+static void dma_pl330_rqcb(struct dma_pl330_desc *desc, enum pl330_op_err err)
+{
+	struct dma_pl330_chan *pch;
+	unsigned long flags;
+
+	if (!desc)
+		return;
+
+	pch = desc->pchan;
+
+	/* If desc aborted */
+	if (!pch)
+		return;
+
+	spin_lock_irqsave(&pch->lock, flags);
+
+	desc->status = DONE;
+
+	spin_unlock_irqrestore(&pch->lock, flags);
+
+	tasklet_schedule(&pch->task);
+}
+
 static void pl330_dotask(unsigned long data)
 {
 	struct pl330_dmac *pl330 = (struct pl330_dmac *) data;
-	struct pl330_info *pi = pl330->pinfo;
 	unsigned long flags;
 	int i;
 
@@ -1631,16 +1482,16 @@
 	if (pl330->dmac_tbd.reset_mngr) {
 		_stop(pl330->manager);
 		/* Reset all channels */
-		pl330->dmac_tbd.reset_chan = (1 << pi->pcfg.num_chan) - 1;
+		pl330->dmac_tbd.reset_chan = (1 << pl330->pcfg.num_chan) - 1;
 		/* Clear the reset flag */
 		pl330->dmac_tbd.reset_mngr = false;
 	}
 
-	for (i = 0; i < pi->pcfg.num_chan; i++) {
+	for (i = 0; i < pl330->pcfg.num_chan; i++) {
 
 		if (pl330->dmac_tbd.reset_chan & (1 << i)) {
 			struct pl330_thread *thrd = &pl330->channels[i];
-			void __iomem *regs = pi->base;
+			void __iomem *regs = pl330->base;
 			enum pl330_op_err err;
 
 			_stop(thrd);
@@ -1651,16 +1502,13 @@
 				err = PL330_ERR_ABORT;
 
 			spin_unlock_irqrestore(&pl330->lock, flags);
-
-			_callback(thrd->req[1 - thrd->lstenq].r, err);
-			_callback(thrd->req[thrd->lstenq].r, err);
-
+			dma_pl330_rqcb(thrd->req[1 - thrd->lstenq].desc, err);
+			dma_pl330_rqcb(thrd->req[thrd->lstenq].desc, err);
 			spin_lock_irqsave(&pl330->lock, flags);
 
-			thrd->req[0].r = NULL;
-			thrd->req[1].r = NULL;
-			mark_free(thrd, 0);
-			mark_free(thrd, 1);
+			thrd->req[0].desc = NULL;
+			thrd->req[1].desc = NULL;
+			thrd->req_running = -1;
 
 			/* Clear the reset flag */
 			pl330->dmac_tbd.reset_chan &= ~(1 << i);
@@ -1673,20 +1521,15 @@
 }
 
 /* Returns 1 if state was updated, 0 otherwise */
-static int pl330_update(const struct pl330_info *pi)
+static int pl330_update(struct pl330_dmac *pl330)
 {
-	struct pl330_req *rqdone, *tmp;
-	struct pl330_dmac *pl330;
+	struct dma_pl330_desc *descdone, *tmp;
 	unsigned long flags;
 	void __iomem *regs;
 	u32 val;
 	int id, ev, ret = 0;
 
-	if (!pi || !pi->pl330_data)
-		return 0;
-
-	regs = pi->base;
-	pl330 = pi->pl330_data;
+	regs = pl330->base;
 
 	spin_lock_irqsave(&pl330->lock, flags);
 
@@ -1696,13 +1539,13 @@
 	else
 		pl330->dmac_tbd.reset_mngr = false;
 
-	val = readl(regs + FSC) & ((1 << pi->pcfg.num_chan) - 1);
+	val = readl(regs + FSC) & ((1 << pl330->pcfg.num_chan) - 1);
 	pl330->dmac_tbd.reset_chan |= val;
 	if (val) {
 		int i = 0;
-		while (i < pi->pcfg.num_chan) {
+		while (i < pl330->pcfg.num_chan) {
 			if (val & (1 << i)) {
-				dev_info(pi->dev,
+				dev_info(pl330->ddma.dev,
 					"Reset Channel-%d\t CS-%x FTC-%x\n",
 						i, readl(regs + CS(i)),
 						readl(regs + FTC(i)));
@@ -1714,15 +1557,16 @@
 
 	/* Check which event happened i.e, thread notified */
 	val = readl(regs + ES);
-	if (pi->pcfg.num_events < 32
-			&& val & ~((1 << pi->pcfg.num_events) - 1)) {
+	if (pl330->pcfg.num_events < 32
+			&& val & ~((1 << pl330->pcfg.num_events) - 1)) {
 		pl330->dmac_tbd.reset_dmac = true;
-		dev_err(pi->dev, "%s:%d Unexpected!\n", __func__, __LINE__);
+		dev_err(pl330->ddma.dev, "%s:%d Unexpected!\n", __func__,
+			__LINE__);
 		ret = 1;
 		goto updt_exit;
 	}
 
-	for (ev = 0; ev < pi->pcfg.num_events; ev++) {
+	for (ev = 0; ev < pl330->pcfg.num_events; ev++) {
 		if (val & (1 << ev)) { /* Event occurred */
 			struct pl330_thread *thrd;
 			u32 inten = readl(regs + INTEN);
@@ -1743,25 +1587,22 @@
 				continue;
 
 			/* Detach the req */
-			rqdone = thrd->req[active].r;
-			thrd->req[active].r = NULL;
-
-			mark_free(thrd, active);
+			descdone = thrd->req[active].desc;
+			thrd->req[active].desc = NULL;
 
 			/* Get going again ASAP */
 			_start(thrd);
 
 			/* For now, just make a list of callbacks to be done */
-			list_add_tail(&rqdone->rqd, &pl330->req_done);
+			list_add_tail(&descdone->rqd, &pl330->req_done);
 		}
 	}
 
 	/* Now that we are in no hurry, do the callbacks */
-	list_for_each_entry_safe(rqdone, tmp, &pl330->req_done, rqd) {
-		list_del(&rqdone->rqd);
-
+	list_for_each_entry_safe(descdone, tmp, &pl330->req_done, rqd) {
+		list_del(&descdone->rqd);
 		spin_unlock_irqrestore(&pl330->lock, flags);
-		_callback(rqdone, PL330_ERR_NONE);
+		dma_pl330_rqcb(descdone, PL330_ERR_NONE);
 		spin_lock_irqsave(&pl330->lock, flags);
 	}
 
@@ -1778,65 +1619,13 @@
 	return ret;
 }
 
-static int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
-{
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	unsigned long flags;
-	int ret = 0, active;
-
-	if (!thrd || thrd->free || thrd->dmac->state == DYING)
-		return -EINVAL;
-
-	pl330 = thrd->dmac;
-	active = thrd->req_running;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	switch (op) {
-	case PL330_OP_FLUSH:
-		/* Make sure the channel is stopped */
-		_stop(thrd);
-
-		thrd->req[0].r = NULL;
-		thrd->req[1].r = NULL;
-		mark_free(thrd, 0);
-		mark_free(thrd, 1);
-		break;
-
-	case PL330_OP_ABORT:
-		/* Make sure the channel is stopped */
-		_stop(thrd);
-
-		/* ABORT is only for the active req */
-		if (active == -1)
-			break;
-
-		thrd->req[active].r = NULL;
-		mark_free(thrd, active);
-
-		/* Start the next */
-	case PL330_OP_START:
-		if ((active == -1) && !_start(thrd))
-			ret = -EIO;
-		break;
-
-	default:
-		ret = -EINVAL;
-	}
-
-	spin_unlock_irqrestore(&pl330->lock, flags);
-	return ret;
-}
-
 /* Reserve an event */
 static inline int _alloc_event(struct pl330_thread *thrd)
 {
 	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
 	int ev;
 
-	for (ev = 0; ev < pi->pcfg.num_events; ev++)
+	for (ev = 0; ev < pl330->pcfg.num_events; ev++)
 		if (pl330->events[ev] == -1) {
 			pl330->events[ev] = thrd->id;
 			return ev;
@@ -1845,45 +1634,38 @@
 	return -1;
 }
 
-static bool _chan_ns(const struct pl330_info *pi, int i)
+static bool _chan_ns(const struct pl330_dmac *pl330, int i)
 {
-	return pi->pcfg.irq_ns & (1 << i);
+	return pl330->pcfg.irq_ns & (1 << i);
 }
 
 /* Upon success, returns IdentityToken for the
  * allocated channel, NULL otherwise.
  */
-static void *pl330_request_channel(const struct pl330_info *pi)
+static struct pl330_thread *pl330_request_channel(struct pl330_dmac *pl330)
 {
 	struct pl330_thread *thrd = NULL;
-	struct pl330_dmac *pl330;
 	unsigned long flags;
 	int chans, i;
 
-	if (!pi || !pi->pl330_data)
-		return NULL;
-
-	pl330 = pi->pl330_data;
-
 	if (pl330->state == DYING)
 		return NULL;
 
-	chans = pi->pcfg.num_chan;
+	chans = pl330->pcfg.num_chan;
 
 	spin_lock_irqsave(&pl330->lock, flags);
 
 	for (i = 0; i < chans; i++) {
 		thrd = &pl330->channels[i];
 		if ((thrd->free) && (!_manager_ns(thrd) ||
-					_chan_ns(pi, i))) {
+					_chan_ns(pl330, i))) {
 			thrd->ev = _alloc_event(thrd);
 			if (thrd->ev >= 0) {
 				thrd->free = false;
 				thrd->lstenq = 1;
-				thrd->req[0].r = NULL;
-				mark_free(thrd, 0);
-				thrd->req[1].r = NULL;
-				mark_free(thrd, 1);
+				thrd->req[0].desc = NULL;
+				thrd->req[1].desc = NULL;
+				thrd->req_running = -1;
 				break;
 			}
 		}
@@ -1899,17 +1681,15 @@
 static inline void _free_event(struct pl330_thread *thrd, int ev)
 {
 	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
 
 	/* If the event is valid and was held by the thread */
-	if (ev >= 0 && ev < pi->pcfg.num_events
+	if (ev >= 0 && ev < pl330->pcfg.num_events
 			&& pl330->events[ev] == thrd->id)
 		pl330->events[ev] = -1;
 }
 
-static void pl330_release_channel(void *ch_id)
+static void pl330_release_channel(struct pl330_thread *thrd)
 {
-	struct pl330_thread *thrd = ch_id;
 	struct pl330_dmac *pl330;
 	unsigned long flags;
 
@@ -1918,8 +1698,8 @@
 
 	_stop(thrd);
 
-	_callback(thrd->req[1 - thrd->lstenq].r, PL330_ERR_ABORT);
-	_callback(thrd->req[thrd->lstenq].r, PL330_ERR_ABORT);
+	dma_pl330_rqcb(thrd->req[1 - thrd->lstenq].desc, PL330_ERR_ABORT);
+	dma_pl330_rqcb(thrd->req[thrd->lstenq].desc, PL330_ERR_ABORT);
 
 	pl330 = thrd->dmac;
 
@@ -1932,72 +1712,70 @@
 /* Initialize the structure for PL330 configuration, that can be used
  * by the client driver the make best use of the DMAC
  */
-static void read_dmac_config(struct pl330_info *pi)
+static void read_dmac_config(struct pl330_dmac *pl330)
 {
-	void __iomem *regs = pi->base;
+	void __iomem *regs = pl330->base;
 	u32 val;
 
 	val = readl(regs + CRD) >> CRD_DATA_WIDTH_SHIFT;
 	val &= CRD_DATA_WIDTH_MASK;
-	pi->pcfg.data_bus_width = 8 * (1 << val);
+	pl330->pcfg.data_bus_width = 8 * (1 << val);
 
 	val = readl(regs + CRD) >> CRD_DATA_BUFF_SHIFT;
 	val &= CRD_DATA_BUFF_MASK;
-	pi->pcfg.data_buf_dep = val + 1;
+	pl330->pcfg.data_buf_dep = val + 1;
 
 	val = readl(regs + CR0) >> CR0_NUM_CHANS_SHIFT;
 	val &= CR0_NUM_CHANS_MASK;
 	val += 1;
-	pi->pcfg.num_chan = val;
+	pl330->pcfg.num_chan = val;
 
 	val = readl(regs + CR0);
 	if (val & CR0_PERIPH_REQ_SET) {
 		val = (val >> CR0_NUM_PERIPH_SHIFT) & CR0_NUM_PERIPH_MASK;
 		val += 1;
-		pi->pcfg.num_peri = val;
-		pi->pcfg.peri_ns = readl(regs + CR4);
+		pl330->pcfg.num_peri = val;
+		pl330->pcfg.peri_ns = readl(regs + CR4);
 	} else {
-		pi->pcfg.num_peri = 0;
+		pl330->pcfg.num_peri = 0;
 	}
 
 	val = readl(regs + CR0);
 	if (val & CR0_BOOT_MAN_NS)
-		pi->pcfg.mode |= DMAC_MODE_NS;
+		pl330->pcfg.mode |= DMAC_MODE_NS;
 	else
-		pi->pcfg.mode &= ~DMAC_MODE_NS;
+		pl330->pcfg.mode &= ~DMAC_MODE_NS;
 
 	val = readl(regs + CR0) >> CR0_NUM_EVENTS_SHIFT;
 	val &= CR0_NUM_EVENTS_MASK;
 	val += 1;
-	pi->pcfg.num_events = val;
+	pl330->pcfg.num_events = val;
 
-	pi->pcfg.irq_ns = readl(regs + CR3);
+	pl330->pcfg.irq_ns = readl(regs + CR3);
 }
 
 static inline void _reset_thread(struct pl330_thread *thrd)
 {
 	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
 
 	thrd->req[0].mc_cpu = pl330->mcode_cpu
-				+ (thrd->id * pi->mcbufsz);
+				+ (thrd->id * pl330->mcbufsz);
 	thrd->req[0].mc_bus = pl330->mcode_bus
-				+ (thrd->id * pi->mcbufsz);
-	thrd->req[0].r = NULL;
-	mark_free(thrd, 0);
+				+ (thrd->id * pl330->mcbufsz);
+	thrd->req[0].desc = NULL;
 
 	thrd->req[1].mc_cpu = thrd->req[0].mc_cpu
-				+ pi->mcbufsz / 2;
+				+ pl330->mcbufsz / 2;
 	thrd->req[1].mc_bus = thrd->req[0].mc_bus
-				+ pi->mcbufsz / 2;
-	thrd->req[1].r = NULL;
-	mark_free(thrd, 1);
+				+ pl330->mcbufsz / 2;
+	thrd->req[1].desc = NULL;
+
+	thrd->req_running = -1;
 }
 
 static int dmac_alloc_threads(struct pl330_dmac *pl330)
 {
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
+	int chans = pl330->pcfg.num_chan;
 	struct pl330_thread *thrd;
 	int i;
 
@@ -2028,29 +1806,28 @@
 
 static int dmac_alloc_resources(struct pl330_dmac *pl330)
 {
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
+	int chans = pl330->pcfg.num_chan;
 	int ret;
 
 	/*
 	 * Alloc MicroCode buffer for 'chans' Channel threads.
 	 * A channel's buffer offset is (Channel_Id * MCODE_BUFF_PERCHAN)
 	 */
-	pl330->mcode_cpu = dma_alloc_coherent(pi->dev,
-				chans * pi->mcbufsz,
+	pl330->mcode_cpu = dma_alloc_coherent(pl330->ddma.dev,
+				chans * pl330->mcbufsz,
 				&pl330->mcode_bus, GFP_KERNEL);
 	if (!pl330->mcode_cpu) {
-		dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
+		dev_err(pl330->ddma.dev, "%s:%d Can't allocate memory!\n",
 			__func__, __LINE__);
 		return -ENOMEM;
 	}
 
 	ret = dmac_alloc_threads(pl330);
 	if (ret) {
-		dev_err(pi->dev, "%s:%d Can't to create channels for DMAC!\n",
+		dev_err(pl330->ddma.dev, "%s:%d Can't to create channels for DMAC!\n",
 			__func__, __LINE__);
-		dma_free_coherent(pi->dev,
-				chans * pi->mcbufsz,
+		dma_free_coherent(pl330->ddma.dev,
+				chans * pl330->mcbufsz,
 				pl330->mcode_cpu, pl330->mcode_bus);
 		return ret;
 	}
@@ -2058,71 +1835,45 @@
 	return 0;
 }
 
-static int pl330_add(struct pl330_info *pi)
+static int pl330_add(struct pl330_dmac *pl330)
 {
-	struct pl330_dmac *pl330;
 	void __iomem *regs;
 	int i, ret;
 
-	if (!pi || !pi->dev)
-		return -EINVAL;
-
-	/* If already added */
-	if (pi->pl330_data)
-		return -EINVAL;
-
-	/*
-	 * If the SoC can perform reset on the DMAC, then do it
-	 * before reading its configuration.
-	 */
-	if (pi->dmac_reset)
-		pi->dmac_reset(pi);
-
-	regs = pi->base;
+	regs = pl330->base;
 
 	/* Check if we can handle this DMAC */
-	if ((pi->pcfg.periph_id & 0xfffff) != PERIPH_ID_VAL) {
-		dev_err(pi->dev, "PERIPH_ID 0x%x !\n", pi->pcfg.periph_id);
+	if ((pl330->pcfg.periph_id & 0xfffff) != PERIPH_ID_VAL) {
+		dev_err(pl330->ddma.dev, "PERIPH_ID 0x%x !\n",
+			pl330->pcfg.periph_id);
 		return -EINVAL;
 	}
 
 	/* Read the configuration of the DMAC */
-	read_dmac_config(pi);
+	read_dmac_config(pl330);
 
-	if (pi->pcfg.num_events == 0) {
-		dev_err(pi->dev, "%s:%d Can't work without events!\n",
+	if (pl330->pcfg.num_events == 0) {
+		dev_err(pl330->ddma.dev, "%s:%d Can't work without events!\n",
 			__func__, __LINE__);
 		return -EINVAL;
 	}
 
-	pl330 = kzalloc(sizeof(*pl330), GFP_KERNEL);
-	if (!pl330) {
-		dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
-			__func__, __LINE__);
-		return -ENOMEM;
-	}
-
-	/* Assign the info structure and private data */
-	pl330->pinfo = pi;
-	pi->pl330_data = pl330;
-
 	spin_lock_init(&pl330->lock);
 
 	INIT_LIST_HEAD(&pl330->req_done);
 
 	/* Use default MC buffer size if not provided */
-	if (!pi->mcbufsz)
-		pi->mcbufsz = MCODE_BUFF_PER_REQ * 2;
+	if (!pl330->mcbufsz)
+		pl330->mcbufsz = MCODE_BUFF_PER_REQ * 2;
 
 	/* Mark all events as free */
-	for (i = 0; i < pi->pcfg.num_events; i++)
+	for (i = 0; i < pl330->pcfg.num_events; i++)
 		pl330->events[i] = -1;
 
 	/* Allocate resources needed by the DMAC */
 	ret = dmac_alloc_resources(pl330);
 	if (ret) {
-		dev_err(pi->dev, "Unable to create channels for DMAC\n");
-		kfree(pl330);
+		dev_err(pl330->ddma.dev, "Unable to create channels for DMAC\n");
 		return ret;
 	}
 
@@ -2135,15 +1886,13 @@
 
 static int dmac_free_threads(struct pl330_dmac *pl330)
 {
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
 	struct pl330_thread *thrd;
 	int i;
 
 	/* Release Channel threads */
-	for (i = 0; i < chans; i++) {
+	for (i = 0; i < pl330->pcfg.num_chan; i++) {
 		thrd = &pl330->channels[i];
-		pl330_release_channel((void *)thrd);
+		pl330_release_channel(thrd);
 	}
 
 	/* Free memory */
@@ -2152,35 +1901,18 @@
 	return 0;
 }
 
-static void dmac_free_resources(struct pl330_dmac *pl330)
+static void pl330_del(struct pl330_dmac *pl330)
 {
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
-
-	dmac_free_threads(pl330);
-
-	dma_free_coherent(pi->dev, chans * pi->mcbufsz,
-				pl330->mcode_cpu, pl330->mcode_bus);
-}
-
-static void pl330_del(struct pl330_info *pi)
-{
-	struct pl330_dmac *pl330;
-
-	if (!pi || !pi->pl330_data)
-		return;
-
-	pl330 = pi->pl330_data;
-
 	pl330->state = UNINIT;
 
 	tasklet_kill(&pl330->tasks);
 
 	/* Free DMAC resources */
-	dmac_free_resources(pl330);
+	dmac_free_threads(pl330);
 
-	kfree(pl330);
-	pi->pl330_data = NULL;
+	dma_free_coherent(pl330->ddma.dev,
+		pl330->pcfg.num_chan * pl330->mcbufsz, pl330->mcode_cpu,
+		pl330->mcode_bus);
 }
 
 /* forward declaration */
@@ -2212,8 +1944,7 @@
 		if (desc->status == BUSY)
 			continue;
 
-		ret = pl330_submit_req(pch->pl330_chid,
-						&desc->req);
+		ret = pl330_submit_req(pch->thread, desc);
 		if (!ret) {
 			desc->status = BUSY;
 		} else if (ret == -EAGAIN) {
@@ -2222,7 +1953,7 @@
 		} else {
 			/* Unacceptable request */
 			desc->status = DONE;
-			dev_err(pch->dmac->pif.dev, "%s:%d Bad Desc(%d)\n",
+			dev_err(pch->dmac->ddma.dev, "%s:%d Bad Desc(%d)\n",
 					__func__, __LINE__, desc->txd.cookie);
 			tasklet_schedule(&pch->task);
 		}
@@ -2249,7 +1980,9 @@
 	fill_queue(pch);
 
 	/* Make sure the PL330 Channel thread is active */
-	pl330_chan_ctrl(pch->pl330_chid, PL330_OP_START);
+	spin_lock(&pch->thread->dmac->lock);
+	_start(pch->thread);
+	spin_unlock(&pch->thread->dmac->lock);
 
 	while (!list_empty(&pch->completed_list)) {
 		dma_async_tx_callback callback;
@@ -2280,25 +2013,6 @@
 	spin_unlock_irqrestore(&pch->lock, flags);
 }
 
-static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
-{
-	struct dma_pl330_desc *desc = token;
-	struct dma_pl330_chan *pch = desc->pchan;
-	unsigned long flags;
-
-	/* If desc aborted */
-	if (!pch)
-		return;
-
-	spin_lock_irqsave(&pch->lock, flags);
-
-	desc->status = DONE;
-
-	spin_unlock_irqrestore(&pch->lock, flags);
-
-	tasklet_schedule(&pch->task);
-}
-
 bool pl330_filter(struct dma_chan *chan, void *param)
 {
 	u8 *peri_id;
@@ -2315,23 +2029,26 @@
 						struct of_dma *ofdma)
 {
 	int count = dma_spec->args_count;
-	struct dma_pl330_dmac *pdmac = ofdma->of_dma_data;
+	struct pl330_dmac *pl330 = ofdma->of_dma_data;
 	unsigned int chan_id;
 
+	if (!pl330)
+		return NULL;
+
 	if (count != 1)
 		return NULL;
 
 	chan_id = dma_spec->args[0];
-	if (chan_id >= pdmac->num_peripherals)
+	if (chan_id >= pl330->num_peripherals)
 		return NULL;
 
-	return dma_get_slave_channel(&pdmac->peripherals[chan_id].chan);
+	return dma_get_slave_channel(&pl330->peripherals[chan_id].chan);
 }
 
 static int pl330_alloc_chan_resources(struct dma_chan *chan)
 {
 	struct dma_pl330_chan *pch = to_pchan(chan);
-	struct dma_pl330_dmac *pdmac = pch->dmac;
+	struct pl330_dmac *pl330 = pch->dmac;
 	unsigned long flags;
 
 	spin_lock_irqsave(&pch->lock, flags);
@@ -2339,8 +2056,8 @@
 	dma_cookie_init(chan);
 	pch->cyclic = false;
 
-	pch->pl330_chid = pl330_request_channel(&pdmac->pif);
-	if (!pch->pl330_chid) {
+	pch->thread = pl330_request_channel(pl330);
+	if (!pch->thread) {
 		spin_unlock_irqrestore(&pch->lock, flags);
 		return -ENOMEM;
 	}
@@ -2357,7 +2074,7 @@
 	struct dma_pl330_chan *pch = to_pchan(chan);
 	struct dma_pl330_desc *desc;
 	unsigned long flags;
-	struct dma_pl330_dmac *pdmac = pch->dmac;
+	struct pl330_dmac *pl330 = pch->dmac;
 	struct dma_slave_config *slave_config;
 	LIST_HEAD(list);
 
@@ -2365,8 +2082,13 @@
 	case DMA_TERMINATE_ALL:
 		spin_lock_irqsave(&pch->lock, flags);
 
-		/* FLUSH the PL330 Channel thread */
-		pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
+		spin_lock(&pl330->lock);
+		_stop(pch->thread);
+		spin_unlock(&pl330->lock);
+
+		pch->thread->req[0].desc = NULL;
+		pch->thread->req[1].desc = NULL;
+		pch->thread->req_running = -1;
 
 		/* Mark all desc done */
 		list_for_each_entry(desc, &pch->submitted_list, node) {
@@ -2384,9 +2106,9 @@
 			dma_cookie_complete(&desc->txd);
 		}
 
-		list_splice_tail_init(&pch->submitted_list, &pdmac->desc_pool);
-		list_splice_tail_init(&pch->work_list, &pdmac->desc_pool);
-		list_splice_tail_init(&pch->completed_list, &pdmac->desc_pool);
+		list_splice_tail_init(&pch->submitted_list, &pl330->desc_pool);
+		list_splice_tail_init(&pch->work_list, &pl330->desc_pool);
+		list_splice_tail_init(&pch->completed_list, &pl330->desc_pool);
 		spin_unlock_irqrestore(&pch->lock, flags);
 		break;
 	case DMA_SLAVE_CONFIG:
@@ -2409,7 +2131,7 @@
 		}
 		break;
 	default:
-		dev_err(pch->dmac->pif.dev, "Not supported command.\n");
+		dev_err(pch->dmac->ddma.dev, "Not supported command.\n");
 		return -ENXIO;
 	}
 
@@ -2425,8 +2147,8 @@
 
 	spin_lock_irqsave(&pch->lock, flags);
 
-	pl330_release_channel(pch->pl330_chid);
-	pch->pl330_chid = NULL;
+	pl330_release_channel(pch->thread);
+	pch->thread = NULL;
 
 	if (pch->cyclic)
 		list_splice_tail_init(&pch->work_list, &pch->dmac->desc_pool);
@@ -2489,57 +2211,46 @@
 
 static inline void _init_desc(struct dma_pl330_desc *desc)
 {
-	desc->req.x = &desc->px;
-	desc->req.token = desc;
 	desc->rqcfg.swap = SWAP_NO;
-	desc->rqcfg.scctl = SCCTRL0;
-	desc->rqcfg.dcctl = DCCTRL0;
-	desc->req.cfg = &desc->rqcfg;
-	desc->req.xfer_cb = dma_pl330_rqcb;
+	desc->rqcfg.scctl = CCTRL0;
+	desc->rqcfg.dcctl = CCTRL0;
 	desc->txd.tx_submit = pl330_tx_submit;
 
 	INIT_LIST_HEAD(&desc->node);
 }
 
 /* Returns the number of descriptors added to the DMAC pool */
-static int add_desc(struct dma_pl330_dmac *pdmac, gfp_t flg, int count)
+static int add_desc(struct pl330_dmac *pl330, gfp_t flg, int count)
 {
 	struct dma_pl330_desc *desc;
 	unsigned long flags;
 	int i;
 
-	if (!pdmac)
-		return 0;
-
 	desc = kcalloc(count, sizeof(*desc), flg);
 	if (!desc)
 		return 0;
 
-	spin_lock_irqsave(&pdmac->pool_lock, flags);
+	spin_lock_irqsave(&pl330->pool_lock, flags);
 
 	for (i = 0; i < count; i++) {
 		_init_desc(&desc[i]);
-		list_add_tail(&desc[i].node, &pdmac->desc_pool);
+		list_add_tail(&desc[i].node, &pl330->desc_pool);
 	}
 
-	spin_unlock_irqrestore(&pdmac->pool_lock, flags);
+	spin_unlock_irqrestore(&pl330->pool_lock, flags);
 
 	return count;
 }
 
-static struct dma_pl330_desc *
-pluck_desc(struct dma_pl330_dmac *pdmac)
+static struct dma_pl330_desc *pluck_desc(struct pl330_dmac *pl330)
 {
 	struct dma_pl330_desc *desc = NULL;
 	unsigned long flags;
 
-	if (!pdmac)
-		return NULL;
+	spin_lock_irqsave(&pl330->pool_lock, flags);
 
-	spin_lock_irqsave(&pdmac->pool_lock, flags);
-
-	if (!list_empty(&pdmac->desc_pool)) {
-		desc = list_entry(pdmac->desc_pool.next,
+	if (!list_empty(&pl330->desc_pool)) {
+		desc = list_entry(pl330->desc_pool.next,
 				struct dma_pl330_desc, node);
 
 		list_del_init(&desc->node);
@@ -2548,29 +2259,29 @@
 		desc->txd.callback = NULL;
 	}
 
-	spin_unlock_irqrestore(&pdmac->pool_lock, flags);
+	spin_unlock_irqrestore(&pl330->pool_lock, flags);
 
 	return desc;
 }
 
 static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
 {
-	struct dma_pl330_dmac *pdmac = pch->dmac;
+	struct pl330_dmac *pl330 = pch->dmac;
 	u8 *peri_id = pch->chan.private;
 	struct dma_pl330_desc *desc;
 
 	/* Pluck one desc from the pool of DMAC */
-	desc = pluck_desc(pdmac);
+	desc = pluck_desc(pl330);
 
 	/* If the DMAC pool is empty, alloc new */
 	if (!desc) {
-		if (!add_desc(pdmac, GFP_ATOMIC, 1))
+		if (!add_desc(pl330, GFP_ATOMIC, 1))
 			return NULL;
 
 		/* Try again */
-		desc = pluck_desc(pdmac);
+		desc = pluck_desc(pl330);
 		if (!desc) {
-			dev_err(pch->dmac->pif.dev,
+			dev_err(pch->dmac->ddma.dev,
 				"%s:%d ALERT!\n", __func__, __LINE__);
 			return NULL;
 		}
@@ -2581,8 +2292,8 @@
 	desc->txd.cookie = 0;
 	async_tx_ack(&desc->txd);
 
-	desc->req.peri = peri_id ? pch->chan.chan_id : 0;
-	desc->rqcfg.pcfg = &pch->dmac->pif.pcfg;
+	desc->peri = peri_id ? pch->chan.chan_id : 0;
+	desc->rqcfg.pcfg = &pch->dmac->pcfg;
 
 	dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
 
@@ -2592,7 +2303,6 @@
 static inline void fill_px(struct pl330_xfer *px,
 		dma_addr_t dst, dma_addr_t src, size_t len)
 {
-	px->next = NULL;
 	px->bytes = len;
 	px->dst_addr = dst;
 	px->src_addr = src;
@@ -2605,7 +2315,7 @@
 	struct dma_pl330_desc *desc = pl330_get_desc(pch);
 
 	if (!desc) {
-		dev_err(pch->dmac->pif.dev, "%s:%d Unable to fetch desc\n",
+		dev_err(pch->dmac->ddma.dev, "%s:%d Unable to fetch desc\n",
 			__func__, __LINE__);
 		return NULL;
 	}
@@ -2629,11 +2339,11 @@
 static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
 {
 	struct dma_pl330_chan *pch = desc->pchan;
-	struct pl330_info *pi = &pch->dmac->pif;
+	struct pl330_dmac *pl330 = pch->dmac;
 	int burst_len;
 
-	burst_len = pi->pcfg.data_bus_width / 8;
-	burst_len *= pi->pcfg.data_buf_dep;
+	burst_len = pl330->pcfg.data_bus_width / 8;
+	burst_len *= pl330->pcfg.data_buf_dep;
 	burst_len >>= desc->rqcfg.brst_size;
 
 	/* src/dst_burst_len can't be more than 16 */
@@ -2652,11 +2362,11 @@
 static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context)
+		unsigned long flags)
 {
 	struct dma_pl330_desc *desc = NULL, *first = NULL;
 	struct dma_pl330_chan *pch = to_pchan(chan);
-	struct dma_pl330_dmac *pdmac = pch->dmac;
+	struct pl330_dmac *pl330 = pch->dmac;
 	unsigned int i;
 	dma_addr_t dst;
 	dma_addr_t src;
@@ -2665,7 +2375,7 @@
 		return NULL;
 
 	if (!is_slave_direction(direction)) {
-		dev_err(pch->dmac->pif.dev, "%s:%d Invalid dma direction\n",
+		dev_err(pch->dmac->ddma.dev, "%s:%d Invalid dma direction\n",
 		__func__, __LINE__);
 		return NULL;
 	}
@@ -2673,23 +2383,23 @@
 	for (i = 0; i < len / period_len; i++) {
 		desc = pl330_get_desc(pch);
 		if (!desc) {
-			dev_err(pch->dmac->pif.dev, "%s:%d Unable to fetch desc\n",
+			dev_err(pch->dmac->ddma.dev, "%s:%d Unable to fetch desc\n",
 				__func__, __LINE__);
 
 			if (!first)
 				return NULL;
 
-			spin_lock_irqsave(&pdmac->pool_lock, flags);
+			spin_lock_irqsave(&pl330->pool_lock, flags);
 
 			while (!list_empty(&first->node)) {
 				desc = list_entry(first->node.next,
 						struct dma_pl330_desc, node);
-				list_move_tail(&desc->node, &pdmac->desc_pool);
+				list_move_tail(&desc->node, &pl330->desc_pool);
 			}
 
-			list_move_tail(&first->node, &pdmac->desc_pool);
+			list_move_tail(&first->node, &pl330->desc_pool);
 
-			spin_unlock_irqrestore(&pdmac->pool_lock, flags);
+			spin_unlock_irqrestore(&pl330->pool_lock, flags);
 
 			return NULL;
 		}
@@ -2698,14 +2408,12 @@
 		case DMA_MEM_TO_DEV:
 			desc->rqcfg.src_inc = 1;
 			desc->rqcfg.dst_inc = 0;
-			desc->req.rqtype = MEMTODEV;
 			src = dma_addr;
 			dst = pch->fifo_addr;
 			break;
 		case DMA_DEV_TO_MEM:
 			desc->rqcfg.src_inc = 0;
 			desc->rqcfg.dst_inc = 1;
-			desc->req.rqtype = DEVTOMEM;
 			src = pch->fifo_addr;
 			dst = dma_addr;
 			break;
@@ -2713,6 +2421,7 @@
 			break;
 		}
 
+		desc->rqtype = direction;
 		desc->rqcfg.brst_size = pch->burst_sz;
 		desc->rqcfg.brst_len = 1;
 		fill_px(&desc->px, dst, src, period_len);
@@ -2740,24 +2449,22 @@
 {
 	struct dma_pl330_desc *desc;
 	struct dma_pl330_chan *pch = to_pchan(chan);
-	struct pl330_info *pi;
+	struct pl330_dmac *pl330 = pch->dmac;
 	int burst;
 
 	if (unlikely(!pch || !len))
 		return NULL;
 
-	pi = &pch->dmac->pif;
-
 	desc = __pl330_prep_dma_memcpy(pch, dst, src, len);
 	if (!desc)
 		return NULL;
 
 	desc->rqcfg.src_inc = 1;
 	desc->rqcfg.dst_inc = 1;
-	desc->req.rqtype = MEMTOMEM;
+	desc->rqtype = DMA_MEM_TO_MEM;
 
 	/* Select max possible burst size */
-	burst = pi->pcfg.data_bus_width / 8;
+	burst = pl330->pcfg.data_bus_width / 8;
 
 	while (burst > 1) {
 		if (!(len % burst))
@@ -2776,7 +2483,7 @@
 	return &desc->txd;
 }
 
-static void __pl330_giveback_desc(struct dma_pl330_dmac *pdmac,
+static void __pl330_giveback_desc(struct pl330_dmac *pl330,
 				  struct dma_pl330_desc *first)
 {
 	unsigned long flags;
@@ -2785,17 +2492,17 @@
 	if (!first)
 		return;
 
-	spin_lock_irqsave(&pdmac->pool_lock, flags);
+	spin_lock_irqsave(&pl330->pool_lock, flags);
 
 	while (!list_empty(&first->node)) {
 		desc = list_entry(first->node.next,
 				struct dma_pl330_desc, node);
-		list_move_tail(&desc->node, &pdmac->desc_pool);
+		list_move_tail(&desc->node, &pl330->desc_pool);
 	}
 
-	list_move_tail(&first->node, &pdmac->desc_pool);
+	list_move_tail(&first->node, &pl330->desc_pool);
 
-	spin_unlock_irqrestore(&pdmac->pool_lock, flags);
+	spin_unlock_irqrestore(&pl330->pool_lock, flags);
 }
 
 static struct dma_async_tx_descriptor *
@@ -2820,12 +2527,12 @@
 
 		desc = pl330_get_desc(pch);
 		if (!desc) {
-			struct dma_pl330_dmac *pdmac = pch->dmac;
+			struct pl330_dmac *pl330 = pch->dmac;
 
-			dev_err(pch->dmac->pif.dev,
+			dev_err(pch->dmac->ddma.dev,
 				"%s:%d Unable to fetch desc\n",
 				__func__, __LINE__);
-			__pl330_giveback_desc(pdmac, first);
+			__pl330_giveback_desc(pl330, first);
 
 			return NULL;
 		}
@@ -2838,19 +2545,18 @@
 		if (direction == DMA_MEM_TO_DEV) {
 			desc->rqcfg.src_inc = 1;
 			desc->rqcfg.dst_inc = 0;
-			desc->req.rqtype = MEMTODEV;
 			fill_px(&desc->px,
 				addr, sg_dma_address(sg), sg_dma_len(sg));
 		} else {
 			desc->rqcfg.src_inc = 0;
 			desc->rqcfg.dst_inc = 1;
-			desc->req.rqtype = DEVTOMEM;
 			fill_px(&desc->px,
 				sg_dma_address(sg), addr, sg_dma_len(sg));
 		}
 
 		desc->rqcfg.brst_size = pch->burst_sz;
 		desc->rqcfg.brst_len = 1;
+		desc->rqtype = direction;
 	}
 
 	/* Return the last desc in the chain */
@@ -2890,9 +2596,9 @@
 pl330_probe(struct amba_device *adev, const struct amba_id *id)
 {
 	struct dma_pl330_platdata *pdat;
-	struct dma_pl330_dmac *pdmac;
+	struct pl330_config *pcfg;
+	struct pl330_dmac *pl330;
 	struct dma_pl330_chan *pch, *_p;
-	struct pl330_info *pi;
 	struct dma_device *pd;
 	struct resource *res;
 	int i, ret, irq;
@@ -2905,30 +2611,27 @@
 		return ret;
 
 	/* Allocate a new DMAC and its Channels */
-	pdmac = devm_kzalloc(&adev->dev, sizeof(*pdmac), GFP_KERNEL);
-	if (!pdmac) {
+	pl330 = devm_kzalloc(&adev->dev, sizeof(*pl330), GFP_KERNEL);
+	if (!pl330) {
 		dev_err(&adev->dev, "unable to allocate mem\n");
 		return -ENOMEM;
 	}
 
-	pi = &pdmac->pif;
-	pi->dev = &adev->dev;
-	pi->pl330_data = NULL;
-	pi->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
+	pl330->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
 
 	res = &adev->res;
-	pi->base = devm_ioremap_resource(&adev->dev, res);
-	if (IS_ERR(pi->base))
-		return PTR_ERR(pi->base);
+	pl330->base = devm_ioremap_resource(&adev->dev, res);
+	if (IS_ERR(pl330->base))
+		return PTR_ERR(pl330->base);
 
-	amba_set_drvdata(adev, pdmac);
+	amba_set_drvdata(adev, pl330);
 
 	for (i = 0; i < AMBA_NR_IRQS; i++) {
 		irq = adev->irq[i];
 		if (irq) {
 			ret = devm_request_irq(&adev->dev, irq,
 					       pl330_irq_handler, 0,
-					       dev_name(&adev->dev), pi);
+					       dev_name(&adev->dev), pl330);
 			if (ret)
 				return ret;
 		} else {
@@ -2936,38 +2639,40 @@
 		}
 	}
 
-	pi->pcfg.periph_id = adev->periphid;
-	ret = pl330_add(pi);
+	pcfg = &pl330->pcfg;
+
+	pcfg->periph_id = adev->periphid;
+	ret = pl330_add(pl330);
 	if (ret)
 		return ret;
 
-	INIT_LIST_HEAD(&pdmac->desc_pool);
-	spin_lock_init(&pdmac->pool_lock);
+	INIT_LIST_HEAD(&pl330->desc_pool);
+	spin_lock_init(&pl330->pool_lock);
 
 	/* Create a descriptor pool of default size */
-	if (!add_desc(pdmac, GFP_KERNEL, NR_DEFAULT_DESC))
+	if (!add_desc(pl330, GFP_KERNEL, NR_DEFAULT_DESC))
 		dev_warn(&adev->dev, "unable to allocate desc\n");
 
-	pd = &pdmac->ddma;
+	pd = &pl330->ddma;
 	INIT_LIST_HEAD(&pd->channels);
 
 	/* Initialize channel parameters */
 	if (pdat)
-		num_chan = max_t(int, pdat->nr_valid_peri, pi->pcfg.num_chan);
+		num_chan = max_t(int, pdat->nr_valid_peri, pcfg->num_chan);
 	else
-		num_chan = max_t(int, pi->pcfg.num_peri, pi->pcfg.num_chan);
+		num_chan = max_t(int, pcfg->num_peri, pcfg->num_chan);
 
-	pdmac->num_peripherals = num_chan;
+	pl330->num_peripherals = num_chan;
 
-	pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
-	if (!pdmac->peripherals) {
+	pl330->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
+	if (!pl330->peripherals) {
 		ret = -ENOMEM;
-		dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n");
+		dev_err(&adev->dev, "unable to allocate pl330->peripherals\n");
 		goto probe_err2;
 	}
 
 	for (i = 0; i < num_chan; i++) {
-		pch = &pdmac->peripherals[i];
+		pch = &pl330->peripherals[i];
 		if (!adev->dev.of_node)
 			pch->chan.private = pdat ? &pdat->peri_id[i] : NULL;
 		else
@@ -2977,9 +2682,9 @@
 		INIT_LIST_HEAD(&pch->work_list);
 		INIT_LIST_HEAD(&pch->completed_list);
 		spin_lock_init(&pch->lock);
-		pch->pl330_chid = NULL;
+		pch->thread = NULL;
 		pch->chan.device = pd;
-		pch->dmac = pdmac;
+		pch->dmac = pl330;
 
 		/* Add the channel to the DMAC list */
 		list_add_tail(&pch->chan.device_node, &pd->channels);
@@ -2990,7 +2695,7 @@
 		pd->cap_mask = pdat->cap_mask;
 	} else {
 		dma_cap_set(DMA_MEMCPY, pd->cap_mask);
-		if (pi->pcfg.num_peri) {
+		if (pcfg->num_peri) {
 			dma_cap_set(DMA_SLAVE, pd->cap_mask);
 			dma_cap_set(DMA_CYCLIC, pd->cap_mask);
 			dma_cap_set(DMA_PRIVATE, pd->cap_mask);
@@ -3015,14 +2720,14 @@
 
 	if (adev->dev.of_node) {
 		ret = of_dma_controller_register(adev->dev.of_node,
-					 of_dma_pl330_xlate, pdmac);
+					 of_dma_pl330_xlate, pl330);
 		if (ret) {
 			dev_err(&adev->dev,
 			"unable to register DMA to the generic DT DMA helpers\n");
 		}
 	}
 
-	adev->dev.dma_parms = &pdmac->dma_parms;
+	adev->dev.dma_parms = &pl330->dma_parms;
 
 	/*
 	 * This is the limit for transfers with a buswidth of 1, larger
@@ -3037,14 +2742,13 @@
 		"Loaded driver for PL330 DMAC-%d\n", adev->periphid);
 	dev_info(&adev->dev,
 		"\tDBUFF-%ux%ubytes Num_Chans-%u Num_Peri-%u Num_Events-%u\n",
-		pi->pcfg.data_buf_dep,
-		pi->pcfg.data_bus_width / 8, pi->pcfg.num_chan,
-		pi->pcfg.num_peri, pi->pcfg.num_events);
+		pcfg->data_buf_dep, pcfg->data_bus_width / 8, pcfg->num_chan,
+		pcfg->num_peri, pcfg->num_events);
 
 	return 0;
 probe_err3:
 	/* Idle the DMAC */
-	list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels,
+	list_for_each_entry_safe(pch, _p, &pl330->ddma.channels,
 			chan.device_node) {
 
 		/* Remove the channel */
@@ -3055,27 +2759,23 @@
 		pl330_free_chan_resources(&pch->chan);
 	}
 probe_err2:
-	pl330_del(pi);
+	pl330_del(pl330);
 
 	return ret;
 }
 
 static int pl330_remove(struct amba_device *adev)
 {
-	struct dma_pl330_dmac *pdmac = amba_get_drvdata(adev);
+	struct pl330_dmac *pl330 = amba_get_drvdata(adev);
 	struct dma_pl330_chan *pch, *_p;
-	struct pl330_info *pi;
-
-	if (!pdmac)
-		return 0;
 
 	if (adev->dev.of_node)
 		of_dma_controller_free(adev->dev.of_node);
 
-	dma_async_device_unregister(&pdmac->ddma);
+	dma_async_device_unregister(&pl330->ddma);
 
 	/* Idle the DMAC */
-	list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels,
+	list_for_each_entry_safe(pch, _p, &pl330->ddma.channels,
 			chan.device_node) {
 
 		/* Remove the channel */
@@ -3086,9 +2786,7 @@
 		pl330_free_chan_resources(&pch->chan);
 	}
 
-	pi = &pdmac->pif;
-
-	pl330_del(pi);
+	pl330_del(pl330);
 
 	return 0;
 }
diff --git a/drivers/dma/qcom_bam_dma.c b/drivers/dma/qcom_bam_dma.c
index 82c9231..7a4bbb0 100644
--- a/drivers/dma/qcom_bam_dma.c
+++ b/drivers/dma/qcom_bam_dma.c
@@ -61,12 +61,17 @@
 #define DESC_FLAG_INT BIT(15)
 #define DESC_FLAG_EOT BIT(14)
 #define DESC_FLAG_EOB BIT(13)
+#define DESC_FLAG_NWD BIT(12)
 
 struct bam_async_desc {
 	struct virt_dma_desc vd;
 
 	u32 num_desc;
 	u32 xfer_len;
+
+	/* transaction flags, EOT|EOB|NWD */
+	u16 flags;
+
 	struct bam_desc_hw *curr_desc;
 
 	enum dma_transfer_direction dir;
@@ -490,6 +495,14 @@
 	if (!async_desc)
 		goto err_out;
 
+	if (flags & DMA_PREP_FENCE)
+		async_desc->flags |= DESC_FLAG_NWD;
+
+	if (flags & DMA_PREP_INTERRUPT)
+		async_desc->flags |= DESC_FLAG_EOT;
+	else
+		async_desc->flags |= DESC_FLAG_INT;
+
 	async_desc->num_desc = num_alloc;
 	async_desc->curr_desc = async_desc->desc;
 	async_desc->dir = direction;
@@ -793,8 +806,11 @@
 	else
 		async_desc->xfer_len = async_desc->num_desc;
 
-	/* set INT on last descriptor */
-	desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
+	/* set any special flags on the last descriptor */
+	if (async_desc->num_desc == async_desc->xfer_len)
+		desc[async_desc->xfer_len - 1].flags = async_desc->flags;
+	else
+		desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
 
 	if (bchan->tail + async_desc->xfer_len > MAX_DESCRIPTORS) {
 		u32 partial = MAX_DESCRIPTORS - bchan->tail;
diff --git a/drivers/dma/s3c24xx-dma.c b/drivers/dma/s3c24xx-dma.c
index 012520c..7416572 100644
--- a/drivers/dma/s3c24xx-dma.c
+++ b/drivers/dma/s3c24xx-dma.c
@@ -889,8 +889,7 @@
 
 static struct dma_async_tx_descriptor *s3c24xx_dma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t addr, size_t size, size_t period,
-	enum dma_transfer_direction direction, unsigned long flags,
-	void *context)
+	enum dma_transfer_direction direction, unsigned long flags)
 {
 	struct s3c24xx_dma_chan *s3cchan = to_s3c24xx_dma_chan(chan);
 	struct s3c24xx_dma_engine *s3cdma = s3cchan->host;
diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c
index 5ebdfbc..4b0ef04 100644
--- a/drivers/dma/sa11x0-dma.c
+++ b/drivers/dma/sa11x0-dma.c
@@ -612,7 +612,7 @@
 
 static struct dma_async_tx_descriptor *sa11x0_dma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t addr, size_t size, size_t period,
-	enum dma_transfer_direction dir, unsigned long flags, void *context)
+	enum dma_transfer_direction dir, unsigned long flags)
 {
 	struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
 	struct sa11x0_dma_desc *txd;
diff --git a/drivers/dma/sh/Kconfig b/drivers/dma/sh/Kconfig
index 0f71981..0349125 100644
--- a/drivers/dma/sh/Kconfig
+++ b/drivers/dma/sh/Kconfig
@@ -2,21 +2,39 @@
 # DMA engine configuration for sh
 #
 
+#
+# DMA Engine Helpers
+#
+
 config SH_DMAE_BASE
 	bool "Renesas SuperH DMA Engine support"
-	depends on (SUPERH && SH_DMA) || ARCH_SHMOBILE || COMPILE_TEST
+	depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
+	depends on !SUPERH || SH_DMA
 	depends on !SH_DMA_API
 	default y
 	select DMA_ENGINE
 	help
 	  Enable support for the Renesas SuperH DMA controllers.
 
+#
+# DMA Controllers
+#
+
 config SH_DMAE
 	tristate "Renesas SuperH DMAC support"
 	depends on SH_DMAE_BASE
 	help
 	  Enable support for the Renesas SuperH DMA controllers.
 
+if SH_DMAE
+
+config SH_DMAE_R8A73A4
+	def_bool y
+	depends on ARCH_R8A73A4
+	depends on OF
+
+endif
+
 config SUDMAC
 	tristate "Renesas SUDMAC support"
 	depends on SH_DMAE_BASE
@@ -34,7 +52,3 @@
 	depends on SH_DMAE_BASE
 	help
 	  Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
-
-config SHDMA_R8A73A4
-	def_bool y
-	depends on ARCH_R8A73A4 && SH_DMAE != n
diff --git a/drivers/dma/sh/Makefile b/drivers/dma/sh/Makefile
index 1ce88b2..0a5cfdb 100644
--- a/drivers/dma/sh/Makefile
+++ b/drivers/dma/sh/Makefile
@@ -1,10 +1,18 @@
+#
+# DMA Engine Helpers
+#
+
 obj-$(CONFIG_SH_DMAE_BASE) += shdma-base.o shdma-of.o
-obj-$(CONFIG_SH_DMAE) += shdma.o
+
+#
+# DMA Controllers
+#
+
 shdma-y := shdmac.o
-ifeq ($(CONFIG_OF),y)
-shdma-$(CONFIG_SHDMA_R8A73A4) += shdma-r8a73a4.o
-endif
+shdma-$(CONFIG_SH_DMAE_R8A73A4) += shdma-r8a73a4.o
 shdma-objs := $(shdma-y)
+obj-$(CONFIG_SH_DMAE) += shdma.o
+
 obj-$(CONFIG_SUDMAC) += sudmac.o
 obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
 obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
index 2de7728..dabbf0a 100644
--- a/drivers/dma/sh/rcar-audmapp.c
+++ b/drivers/dma/sh/rcar-audmapp.c
@@ -22,6 +22,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/dmaengine.h>
+#include <linux/of_dma.h>
 #include <linux/platform_data/dma-rcar-audmapp.h>
 #include <linux/platform_device.h>
 #include <linux/shdma-base.h>
@@ -45,8 +46,9 @@
 
 struct audmapp_chan {
 	struct shdma_chan shdma_chan;
-	struct audmapp_slave_config *config;
 	void __iomem *base;
+	dma_addr_t slave_addr;
+	u32 chcr;
 };
 
 struct audmapp_device {
@@ -56,7 +58,16 @@
 	void __iomem *chan_reg;
 };
 
+struct audmapp_desc {
+	struct shdma_desc shdma_desc;
+	dma_addr_t src;
+	dma_addr_t dst;
+};
+
+#define to_shdma_chan(c) container_of(c, struct shdma_chan, dma_chan)
+
 #define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
+#define to_desc(sdesc) container_of(sdesc, struct audmapp_desc, shdma_desc)
 #define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device,	\
 				  struct audmapp_device, shdma_dev.dma_dev)
 
@@ -90,70 +101,82 @@
 }
 
 static void audmapp_start_xfer(struct shdma_chan *schan,
-			       struct shdma_desc *sdecs)
+			       struct shdma_desc *sdesc)
 {
 	struct audmapp_chan *auchan = to_chan(schan);
 	struct audmapp_device *audev = to_dev(auchan);
-	struct audmapp_slave_config *cfg = auchan->config;
+	struct audmapp_desc *desc = to_desc(sdesc);
 	struct device *dev = audev->dev;
-	u32 chcr = cfg->chcr | PDMACHCR_DE;
+	u32 chcr = auchan->chcr | PDMACHCR_DE;
 
-	dev_dbg(dev, "src/dst/chcr = %pad/%pad/%x\n",
-		&cfg->src, &cfg->dst, cfg->chcr);
+	dev_dbg(dev, "src/dst/chcr = %pad/%pad/%08x\n",
+		&desc->src, &desc->dst, chcr);
 
-	audmapp_write(auchan, cfg->src,	PDMASAR);
-	audmapp_write(auchan, cfg->dst,	PDMADAR);
+	audmapp_write(auchan, desc->src,	PDMASAR);
+	audmapp_write(auchan, desc->dst,	PDMADAR);
 	audmapp_write(auchan, chcr,	PDMACHCR);
 }
 
-static struct audmapp_slave_config *
-audmapp_find_slave(struct audmapp_chan *auchan, int slave_id)
+static void audmapp_get_config(struct audmapp_chan *auchan, int slave_id,
+			      u32 *chcr, dma_addr_t *dst)
 {
 	struct audmapp_device *audev = to_dev(auchan);
 	struct audmapp_pdata *pdata = audev->pdata;
 	struct audmapp_slave_config *cfg;
 	int i;
 
+	*chcr	= 0;
+	*dst	= 0;
+
+	if (!pdata) { /* DT */
+		*chcr = ((u32)slave_id) << 16;
+		auchan->shdma_chan.slave_id = (slave_id) >> 8;
+		return;
+	}
+
+	/* non-DT */
+
 	if (slave_id >= AUDMAPP_SLAVE_NUMBER)
-		return NULL;
+		return;
 
 	for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
-		if (cfg->slave_id == slave_id)
-			return cfg;
-
-	return NULL;
+		if (cfg->slave_id == slave_id) {
+			*chcr	= cfg->chcr;
+			*dst	= cfg->dst;
+			break;
+		}
 }
 
 static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
 			     dma_addr_t slave_addr, bool try)
 {
 	struct audmapp_chan *auchan = to_chan(schan);
-	struct audmapp_slave_config *cfg =
-		audmapp_find_slave(auchan, slave_id);
+	u32 chcr;
+	dma_addr_t dst;
 
-	if (!cfg)
-		return -ENODEV;
+	audmapp_get_config(auchan, slave_id, &chcr, &dst);
+
 	if (try)
 		return 0;
 
-	auchan->config	= cfg;
+	auchan->chcr		= chcr;
+	auchan->slave_addr	= slave_addr ? : dst;
 
 	return 0;
 }
 
 static int audmapp_desc_setup(struct shdma_chan *schan,
-			      struct shdma_desc *sdecs,
+			      struct shdma_desc *sdesc,
 			      dma_addr_t src, dma_addr_t dst, size_t *len)
 {
-	struct audmapp_chan *auchan = to_chan(schan);
-	struct audmapp_slave_config *cfg = auchan->config;
-
-	if (!cfg)
-		return -ENODEV;
+	struct audmapp_desc *desc = to_desc(sdesc);
 
 	if (*len > (size_t)AUDMAPP_LEN_MAX)
 		*len = (size_t)AUDMAPP_LEN_MAX;
 
+	desc->src = src;
+	desc->dst = dst;
+
 	return 0;
 }
 
@@ -164,7 +187,9 @@
 
 static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
 {
-	return 0; /* always fixed address */
+	struct audmapp_chan *auchan = to_chan(schan);
+
+	return auchan->slave_addr;
 }
 
 static bool audmapp_channel_busy(struct shdma_chan *schan)
@@ -183,7 +208,7 @@
 
 static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
 {
-	return &((struct shdma_desc *)buf)[i];
+	return &((struct audmapp_desc *)buf)[i].shdma_desc;
 }
 
 static const struct shdma_ops audmapp_shdma_ops = {
@@ -234,16 +259,39 @@
 	dma_dev->chancnt = 0;
 }
 
+static struct dma_chan *audmapp_of_xlate(struct of_phandle_args *dma_spec,
+					 struct of_dma *ofdma)
+{
+	dma_cap_mask_t mask;
+	struct dma_chan *chan;
+	u32 chcr = dma_spec->args[0];
+
+	if (dma_spec->args_count != 1)
+		return NULL;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	chan = dma_request_channel(mask, shdma_chan_filter, NULL);
+	if (chan)
+		to_shdma_chan(chan)->hw_req = chcr;
+
+	return chan;
+}
+
 static int audmapp_probe(struct platform_device *pdev)
 {
 	struct audmapp_pdata *pdata = pdev->dev.platform_data;
+	struct device_node *np = pdev->dev.of_node;
 	struct audmapp_device *audev;
 	struct shdma_dev *sdev;
 	struct dma_device *dma_dev;
 	struct resource *res;
 	int err, i;
 
-	if (!pdata)
+	if (np)
+		of_dma_controller_register(np, audmapp_of_xlate, pdev);
+	else if (!pdata)
 		return -ENODEV;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -260,7 +308,7 @@
 
 	sdev		= &audev->shdma_dev;
 	sdev->ops	= &audmapp_shdma_ops;
-	sdev->desc_size	= sizeof(struct shdma_desc);
+	sdev->desc_size	= sizeof(struct audmapp_desc);
 
 	dma_dev			= &sdev->dma_dev;
 	dma_dev->copy_align	= LOG2_DEFAULT_XFER_SIZE;
@@ -305,12 +353,18 @@
 	return 0;
 }
 
+static const struct of_device_id audmapp_of_match[] = {
+	{ .compatible = "renesas,rcar-audmapp", },
+	{},
+};
+
 static struct platform_driver audmapp_driver = {
 	.probe		= audmapp_probe,
 	.remove		= audmapp_remove,
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "rcar-audmapp-engine",
+		.of_match_table = audmapp_of_match,
 	},
 };
 module_platform_driver(audmapp_driver);
diff --git a/drivers/dma/sh/shdma-arm.h b/drivers/dma/sh/shdma-arm.h
index a2b8258..a1b0ef4 100644
--- a/drivers/dma/sh/shdma-arm.h
+++ b/drivers/dma/sh/shdma-arm.h
@@ -45,7 +45,7 @@
 	((((i) & TS_LOW_BIT) << TS_LOW_SHIFT) |\
 	 (((i) & TS_HI_BIT)  << TS_HI_SHIFT))
 
-#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL((xmit_sz)))
-#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL((xmit_sz)))
+#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | RS_ERS | TS_INDEX2VAL((xmit_sz)))
+#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | RS_ERS | TS_INDEX2VAL((xmit_sz)))
 
 #endif
diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
index b35007e..42d4974 100644
--- a/drivers/dma/sh/shdma-base.c
+++ b/drivers/dma/sh/shdma-base.c
@@ -206,45 +206,6 @@
 	return 0;
 }
 
-/*
- * This is the standard shdma filter function to be used as a replacement to the
- * "old" method, using the .private pointer. If for some reason you allocate a
- * channel without slave data, use something like ERR_PTR(-EINVAL) as a filter
- * parameter. If this filter is used, the slave driver, after calling
- * dma_request_channel(), will also have to call dmaengine_slave_config() with
- * .slave_id, .direction, and either .src_addr or .dst_addr set.
- * NOTE: this filter doesn't support multiple DMAC drivers with the DMA_SLAVE
- * capability! If this becomes a requirement, hardware glue drivers, using this
- * services would have to provide their own filters, which first would check
- * the device driver, similar to how other DMAC drivers, e.g., sa11x0-dma.c, do
- * this, and only then, in case of a match, call this common filter.
- * NOTE 2: This filter function is also used in the DT case by shdma_of_xlate().
- * In that case the MID-RID value is used for slave channel filtering and is
- * passed to this function in the "arg" parameter.
- */
-bool shdma_chan_filter(struct dma_chan *chan, void *arg)
-{
-	struct shdma_chan *schan = to_shdma_chan(chan);
-	struct shdma_dev *sdev = to_shdma_dev(schan->dma_chan.device);
-	const struct shdma_ops *ops = sdev->ops;
-	int match = (long)arg;
-	int ret;
-
-	if (match < 0)
-		/* No slave requested - arbitrary channel */
-		return true;
-
-	if (!schan->dev->of_node && match >= slave_num)
-		return false;
-
-	ret = ops->set_slave(schan, match, 0, true);
-	if (ret < 0)
-		return false;
-
-	return true;
-}
-EXPORT_SYMBOL(shdma_chan_filter);
-
 static int shdma_alloc_chan_resources(struct dma_chan *chan)
 {
 	struct shdma_chan *schan = to_shdma_chan(chan);
@@ -295,6 +256,51 @@
 	return ret;
 }
 
+/*
+ * This is the standard shdma filter function to be used as a replacement to the
+ * "old" method, using the .private pointer. If for some reason you allocate a
+ * channel without slave data, use something like ERR_PTR(-EINVAL) as a filter
+ * parameter. If this filter is used, the slave driver, after calling
+ * dma_request_channel(), will also have to call dmaengine_slave_config() with
+ * .slave_id, .direction, and either .src_addr or .dst_addr set.
+ * NOTE: this filter doesn't support multiple DMAC drivers with the DMA_SLAVE
+ * capability! If this becomes a requirement, hardware glue drivers, using this
+ * services would have to provide their own filters, which first would check
+ * the device driver, similar to how other DMAC drivers, e.g., sa11x0-dma.c, do
+ * this, and only then, in case of a match, call this common filter.
+ * NOTE 2: This filter function is also used in the DT case by shdma_of_xlate().
+ * In that case the MID-RID value is used for slave channel filtering and is
+ * passed to this function in the "arg" parameter.
+ */
+bool shdma_chan_filter(struct dma_chan *chan, void *arg)
+{
+	struct shdma_chan *schan;
+	struct shdma_dev *sdev;
+	int match = (long)arg;
+	int ret;
+
+	/* Only support channels handled by this driver. */
+	if (chan->device->device_alloc_chan_resources !=
+	    shdma_alloc_chan_resources)
+		return false;
+
+	if (match < 0)
+		/* No slave requested - arbitrary channel */
+		return true;
+
+	schan = to_shdma_chan(chan);
+	if (!schan->dev->of_node && match >= slave_num)
+		return false;
+
+	sdev = to_shdma_dev(schan->dma_chan.device);
+	ret = sdev->ops->set_slave(schan, match, 0, true);
+	if (ret < 0)
+		return false;
+
+	return true;
+}
+EXPORT_SYMBOL(shdma_chan_filter);
+
 static dma_async_tx_callback __ld_cleanup(struct shdma_chan *schan, bool all)
 {
 	struct shdma_desc *desc, *_desc;
@@ -662,15 +668,16 @@
 static struct dma_async_tx_descriptor *shdma_prep_dma_cyclic(
 	struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 	size_t period_len, enum dma_transfer_direction direction,
-	unsigned long flags, void *context)
+	unsigned long flags)
 {
 	struct shdma_chan *schan = to_shdma_chan(chan);
 	struct shdma_dev *sdev = to_shdma_dev(schan->dma_chan.device);
+	struct dma_async_tx_descriptor *desc;
 	const struct shdma_ops *ops = sdev->ops;
 	unsigned int sg_len = buf_len / period_len;
 	int slave_id = schan->slave_id;
 	dma_addr_t slave_addr;
-	struct scatterlist sgl[SHDMA_MAX_SG_LEN];
+	struct scatterlist *sgl;
 	int i;
 
 	if (!chan)
@@ -694,7 +701,16 @@
 
 	slave_addr = ops->slave_addr(schan);
 
+	/*
+	 * Allocate the sg list dynamically as it would consumer too much stack
+	 * space.
+	 */
+	sgl = kcalloc(sg_len, sizeof(*sgl), GFP_KERNEL);
+	if (!sgl)
+		return NULL;
+
 	sg_init_table(sgl, sg_len);
+
 	for (i = 0; i < sg_len; i++) {
 		dma_addr_t src = buf_addr + (period_len * i);
 
@@ -704,8 +720,11 @@
 		sg_dma_len(&sgl[i]) = period_len;
 	}
 
-	return shdma_prep_sg(schan, sgl, sg_len, &slave_addr,
+	desc = shdma_prep_sg(schan, sgl, sg_len, &slave_addr,
 			     direction, flags, true);
+
+	kfree(sgl);
+	return desc;
 }
 
 static int shdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h
index 758a57b..2c0a969 100644
--- a/drivers/dma/sh/shdma.h
+++ b/drivers/dma/sh/shdma.h
@@ -62,7 +62,7 @@
 #define to_sh_dev(chan) container_of(chan->shdma_chan.dma_chan.device,\
 				     struct sh_dmae_device, shdma_dev.dma_dev)
 
-#ifdef CONFIG_SHDMA_R8A73A4
+#ifdef CONFIG_SH_DMAE_R8A73A4
 extern const struct sh_dmae_pdata r8a73a4_dma_pdata;
 #define r8a73a4_shdma_devid (&r8a73a4_dma_pdata)
 #else
diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c
index 146d5df..58eb857 100644
--- a/drivers/dma/sh/shdmac.c
+++ b/drivers/dma/sh/shdmac.c
@@ -38,12 +38,12 @@
 #include "../dmaengine.h"
 #include "shdma.h"
 
-/* DMA register */
-#define SAR	0x00
-#define DAR	0x04
-#define TCR	0x08
-#define CHCR	0x0C
-#define DMAOR	0x40
+/* DMA registers */
+#define SAR	0x00	/* Source Address Register */
+#define DAR	0x04	/* Destination Address Register */
+#define TCR	0x08	/* Transfer Count Register */
+#define CHCR	0x0C	/* Channel Control Register */
+#define DMAOR	0x40	/* DMA Operation Register */
 
 #define TEND	0x18 /* USB-DMAC */
 
@@ -239,9 +239,8 @@
 {
 	/*
 	 * Default configuration for dual address memory-memory transfer.
-	 * 0x400 represents auto-request.
 	 */
-	u32 chcr = DM_INC | SM_INC | 0x400 | log2size_to_chcr(sh_chan,
+	u32 chcr = DM_INC | SM_INC | RS_AUTO | log2size_to_chcr(sh_chan,
 						   LOG2_DEFAULT_XFER_SIZE);
 	sh_chan->xmit_shift = calc_xmit_shift(sh_chan, chcr);
 	chcr_write(sh_chan, chcr);
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index 03f7820..aac03ab 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -580,7 +580,7 @@
 static struct dma_async_tx_descriptor *
 sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
 	size_t buf_len, size_t period_len,
-	enum dma_transfer_direction direction, unsigned long flags, void *context)
+	enum dma_transfer_direction direction, unsigned long flags)
 {
 	struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
 	struct sirfsoc_dma_desc *sdesc = NULL;
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index c798445..5fe5933 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2531,8 +2531,7 @@
 static struct dma_async_tx_descriptor *
 dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
 		     size_t buf_len, size_t period_len,
-		     enum dma_transfer_direction direction, unsigned long flags,
-		     void *context)
+		     enum dma_transfer_direction direction, unsigned long flags)
 {
 	unsigned int periods = buf_len / period_len;
 	struct dma_async_tx_descriptor *txd;
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
new file mode 100644
index 0000000..1f92a56
--- /dev/null
+++ b/drivers/dma/sun6i-dma.c
@@ -0,0 +1,1053 @@
+/*
+ * Copyright (C) 2013-2014 Allwinner Tech Co., Ltd
+ * Author: Sugar <shuge@allwinnertech.com>
+ *
+ * Copyright (C) 2014 Maxime Ripard
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "virt-dma.h"
+
+/*
+ * There's 16 physical channels that can work in parallel.
+ *
+ * However we have 30 different endpoints for our requests.
+ *
+ * Since the channels are able to handle only an unidirectional
+ * transfer, we need to allocate more virtual channels so that
+ * everyone can grab one channel.
+ *
+ * Some devices can't work in both direction (mostly because it
+ * wouldn't make sense), so we have a bit fewer virtual channels than
+ * 2 channels per endpoints.
+ */
+
+#define NR_MAX_CHANNELS		16
+#define NR_MAX_REQUESTS		30
+#define NR_MAX_VCHANS		53
+
+/*
+ * Common registers
+ */
+#define DMA_IRQ_EN(x)		((x) * 0x04)
+#define DMA_IRQ_HALF			BIT(0)
+#define DMA_IRQ_PKG			BIT(1)
+#define DMA_IRQ_QUEUE			BIT(2)
+
+#define DMA_IRQ_CHAN_NR			8
+#define DMA_IRQ_CHAN_WIDTH		4
+
+
+#define DMA_IRQ_STAT(x)		((x) * 0x04 + 0x10)
+
+#define DMA_STAT		0x30
+
+/*
+ * Channels specific registers
+ */
+#define DMA_CHAN_ENABLE		0x00
+#define DMA_CHAN_ENABLE_START		BIT(0)
+#define DMA_CHAN_ENABLE_STOP		0
+
+#define DMA_CHAN_PAUSE		0x04
+#define DMA_CHAN_PAUSE_PAUSE		BIT(1)
+#define DMA_CHAN_PAUSE_RESUME		0
+
+#define DMA_CHAN_LLI_ADDR	0x08
+
+#define DMA_CHAN_CUR_CFG	0x0c
+#define DMA_CHAN_CFG_SRC_DRQ(x)		((x) & 0x1f)
+#define DMA_CHAN_CFG_SRC_IO_MODE	BIT(5)
+#define DMA_CHAN_CFG_SRC_LINEAR_MODE	(0 << 5)
+#define DMA_CHAN_CFG_SRC_BURST(x)	(((x) & 0x3) << 7)
+#define DMA_CHAN_CFG_SRC_WIDTH(x)	(((x) & 0x3) << 9)
+
+#define DMA_CHAN_CFG_DST_DRQ(x)		(DMA_CHAN_CFG_SRC_DRQ(x) << 16)
+#define DMA_CHAN_CFG_DST_IO_MODE	(DMA_CHAN_CFG_SRC_IO_MODE << 16)
+#define DMA_CHAN_CFG_DST_LINEAR_MODE	(DMA_CHAN_CFG_SRC_LINEAR_MODE << 16)
+#define DMA_CHAN_CFG_DST_BURST(x)	(DMA_CHAN_CFG_SRC_BURST(x) << 16)
+#define DMA_CHAN_CFG_DST_WIDTH(x)	(DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
+
+#define DMA_CHAN_CUR_SRC	0x10
+
+#define DMA_CHAN_CUR_DST	0x14
+
+#define DMA_CHAN_CUR_CNT	0x18
+
+#define DMA_CHAN_CUR_PARA	0x1c
+
+
+/*
+ * Various hardware related defines
+ */
+#define LLI_LAST_ITEM	0xfffff800
+#define NORMAL_WAIT	8
+#define DRQ_SDRAM	1
+
+/*
+ * Hardware representation of the LLI
+ *
+ * The hardware will be fed the physical address of this structure,
+ * and read its content in order to start the transfer.
+ */
+struct sun6i_dma_lli {
+	u32			cfg;
+	u32			src;
+	u32			dst;
+	u32			len;
+	u32			para;
+	u32			p_lli_next;
+
+	/*
+	 * This field is not used by the DMA controller, but will be
+	 * used by the CPU to go through the list (mostly for dumping
+	 * or freeing it).
+	 */
+	struct sun6i_dma_lli	*v_lli_next;
+};
+
+
+struct sun6i_desc {
+	struct virt_dma_desc	vd;
+	dma_addr_t		p_lli;
+	struct sun6i_dma_lli	*v_lli;
+};
+
+struct sun6i_pchan {
+	u32			idx;
+	void __iomem		*base;
+	struct sun6i_vchan	*vchan;
+	struct sun6i_desc	*desc;
+	struct sun6i_desc	*done;
+};
+
+struct sun6i_vchan {
+	struct virt_dma_chan	vc;
+	struct list_head	node;
+	struct dma_slave_config	cfg;
+	struct sun6i_pchan	*phy;
+	u8			port;
+};
+
+struct sun6i_dma_dev {
+	struct dma_device	slave;
+	void __iomem		*base;
+	struct clk		*clk;
+	int			irq;
+	spinlock_t		lock;
+	struct reset_control	*rstc;
+	struct tasklet_struct	task;
+	atomic_t		tasklet_shutdown;
+	struct list_head	pending;
+	struct dma_pool		*pool;
+	struct sun6i_pchan	*pchans;
+	struct sun6i_vchan	*vchans;
+};
+
+static struct device *chan2dev(struct dma_chan *chan)
+{
+	return &chan->dev->device;
+}
+
+static inline struct sun6i_dma_dev *to_sun6i_dma_dev(struct dma_device *d)
+{
+	return container_of(d, struct sun6i_dma_dev, slave);
+}
+
+static inline struct sun6i_vchan *to_sun6i_vchan(struct dma_chan *chan)
+{
+	return container_of(chan, struct sun6i_vchan, vc.chan);
+}
+
+static inline struct sun6i_desc *
+to_sun6i_desc(struct dma_async_tx_descriptor *tx)
+{
+	return container_of(tx, struct sun6i_desc, vd.tx);
+}
+
+static inline void sun6i_dma_dump_com_regs(struct sun6i_dma_dev *sdev)
+{
+	dev_dbg(sdev->slave.dev, "Common register:\n"
+		"\tmask0(%04x): 0x%08x\n"
+		"\tmask1(%04x): 0x%08x\n"
+		"\tpend0(%04x): 0x%08x\n"
+		"\tpend1(%04x): 0x%08x\n"
+		"\tstats(%04x): 0x%08x\n",
+		DMA_IRQ_EN(0), readl(sdev->base + DMA_IRQ_EN(0)),
+		DMA_IRQ_EN(1), readl(sdev->base + DMA_IRQ_EN(1)),
+		DMA_IRQ_STAT(0), readl(sdev->base + DMA_IRQ_STAT(0)),
+		DMA_IRQ_STAT(1), readl(sdev->base + DMA_IRQ_STAT(1)),
+		DMA_STAT, readl(sdev->base + DMA_STAT));
+}
+
+static inline void sun6i_dma_dump_chan_regs(struct sun6i_dma_dev *sdev,
+					    struct sun6i_pchan *pchan)
+{
+	phys_addr_t reg = virt_to_phys(pchan->base);
+
+	dev_dbg(sdev->slave.dev, "Chan %d reg: %pa\n"
+		"\t___en(%04x): \t0x%08x\n"
+		"\tpause(%04x): \t0x%08x\n"
+		"\tstart(%04x): \t0x%08x\n"
+		"\t__cfg(%04x): \t0x%08x\n"
+		"\t__src(%04x): \t0x%08x\n"
+		"\t__dst(%04x): \t0x%08x\n"
+		"\tcount(%04x): \t0x%08x\n"
+		"\t_para(%04x): \t0x%08x\n\n",
+		pchan->idx, &reg,
+		DMA_CHAN_ENABLE,
+		readl(pchan->base + DMA_CHAN_ENABLE),
+		DMA_CHAN_PAUSE,
+		readl(pchan->base + DMA_CHAN_PAUSE),
+		DMA_CHAN_LLI_ADDR,
+		readl(pchan->base + DMA_CHAN_LLI_ADDR),
+		DMA_CHAN_CUR_CFG,
+		readl(pchan->base + DMA_CHAN_CUR_CFG),
+		DMA_CHAN_CUR_SRC,
+		readl(pchan->base + DMA_CHAN_CUR_SRC),
+		DMA_CHAN_CUR_DST,
+		readl(pchan->base + DMA_CHAN_CUR_DST),
+		DMA_CHAN_CUR_CNT,
+		readl(pchan->base + DMA_CHAN_CUR_CNT),
+		DMA_CHAN_CUR_PARA,
+		readl(pchan->base + DMA_CHAN_CUR_PARA));
+}
+
+static inline int convert_burst(u32 maxburst, u8 *burst)
+{
+	switch (maxburst) {
+	case 1:
+		*burst = 0;
+		break;
+	case 8:
+		*burst = 2;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static inline int convert_buswidth(enum dma_slave_buswidth addr_width, u8 *width)
+{
+	if ((addr_width < DMA_SLAVE_BUSWIDTH_1_BYTE) ||
+	    (addr_width > DMA_SLAVE_BUSWIDTH_4_BYTES))
+		return -EINVAL;
+
+	*width = addr_width >> 1;
+	return 0;
+}
+
+static void *sun6i_dma_lli_add(struct sun6i_dma_lli *prev,
+			       struct sun6i_dma_lli *next,
+			       dma_addr_t next_phy,
+			       struct sun6i_desc *txd)
+{
+	if ((!prev && !txd) || !next)
+		return NULL;
+
+	if (!prev) {
+		txd->p_lli = next_phy;
+		txd->v_lli = next;
+	} else {
+		prev->p_lli_next = next_phy;
+		prev->v_lli_next = next;
+	}
+
+	next->p_lli_next = LLI_LAST_ITEM;
+	next->v_lli_next = NULL;
+
+	return next;
+}
+
+static inline int sun6i_dma_cfg_lli(struct sun6i_dma_lli *lli,
+				    dma_addr_t src,
+				    dma_addr_t dst, u32 len,
+				    struct dma_slave_config *config)
+{
+	u8 src_width, dst_width, src_burst, dst_burst;
+	int ret;
+
+	if (!config)
+		return -EINVAL;
+
+	ret = convert_burst(config->src_maxburst, &src_burst);
+	if (ret)
+		return ret;
+
+	ret = convert_burst(config->dst_maxburst, &dst_burst);
+	if (ret)
+		return ret;
+
+	ret = convert_buswidth(config->src_addr_width, &src_width);
+	if (ret)
+		return ret;
+
+	ret = convert_buswidth(config->dst_addr_width, &dst_width);
+	if (ret)
+		return ret;
+
+	lli->cfg = DMA_CHAN_CFG_SRC_BURST(src_burst) |
+		DMA_CHAN_CFG_SRC_WIDTH(src_width) |
+		DMA_CHAN_CFG_DST_BURST(dst_burst) |
+		DMA_CHAN_CFG_DST_WIDTH(dst_width);
+
+	lli->src = src;
+	lli->dst = dst;
+	lli->len = len;
+	lli->para = NORMAL_WAIT;
+
+	return 0;
+}
+
+static inline void sun6i_dma_dump_lli(struct sun6i_vchan *vchan,
+				      struct sun6i_dma_lli *lli)
+{
+	phys_addr_t p_lli = virt_to_phys(lli);
+
+	dev_dbg(chan2dev(&vchan->vc.chan),
+		"\n\tdesc:   p - %pa v - 0x%p\n"
+		"\t\tc - 0x%08x s - 0x%08x d - 0x%08x\n"
+		"\t\tl - 0x%08x p - 0x%08x n - 0x%08x\n",
+		&p_lli, lli,
+		lli->cfg, lli->src, lli->dst,
+		lli->len, lli->para, lli->p_lli_next);
+}
+
+static void sun6i_dma_free_desc(struct virt_dma_desc *vd)
+{
+	struct sun6i_desc *txd = to_sun6i_desc(&vd->tx);
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(vd->tx.chan->device);
+	struct sun6i_dma_lli *v_lli, *v_next;
+	dma_addr_t p_lli, p_next;
+
+	if (unlikely(!txd))
+		return;
+
+	p_lli = txd->p_lli;
+	v_lli = txd->v_lli;
+
+	while (v_lli) {
+		v_next = v_lli->v_lli_next;
+		p_next = v_lli->p_lli_next;
+
+		dma_pool_free(sdev->pool, v_lli, p_lli);
+
+		v_lli = v_next;
+		p_lli = p_next;
+	}
+
+	kfree(txd);
+}
+
+static int sun6i_dma_terminate_all(struct sun6i_vchan *vchan)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(vchan->vc.chan.device);
+	struct sun6i_pchan *pchan = vchan->phy;
+	unsigned long flags;
+	LIST_HEAD(head);
+
+	spin_lock(&sdev->lock);
+	list_del_init(&vchan->node);
+	spin_unlock(&sdev->lock);
+
+	spin_lock_irqsave(&vchan->vc.lock, flags);
+
+	vchan_get_all_descriptors(&vchan->vc, &head);
+
+	if (pchan) {
+		writel(DMA_CHAN_ENABLE_STOP, pchan->base + DMA_CHAN_ENABLE);
+		writel(DMA_CHAN_PAUSE_RESUME, pchan->base + DMA_CHAN_PAUSE);
+
+		vchan->phy = NULL;
+		pchan->vchan = NULL;
+		pchan->desc = NULL;
+		pchan->done = NULL;
+	}
+
+	spin_unlock_irqrestore(&vchan->vc.lock, flags);
+
+	vchan_dma_desc_free_list(&vchan->vc, &head);
+
+	return 0;
+}
+
+static int sun6i_dma_start_desc(struct sun6i_vchan *vchan)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(vchan->vc.chan.device);
+	struct virt_dma_desc *desc = vchan_next_desc(&vchan->vc);
+	struct sun6i_pchan *pchan = vchan->phy;
+	u32 irq_val, irq_reg, irq_offset;
+
+	if (!pchan)
+		return -EAGAIN;
+
+	if (!desc) {
+		pchan->desc = NULL;
+		pchan->done = NULL;
+		return -EAGAIN;
+	}
+
+	list_del(&desc->node);
+
+	pchan->desc = to_sun6i_desc(&desc->tx);
+	pchan->done = NULL;
+
+	sun6i_dma_dump_lli(vchan, pchan->desc->v_lli);
+
+	irq_reg = pchan->idx / DMA_IRQ_CHAN_NR;
+	irq_offset = pchan->idx % DMA_IRQ_CHAN_NR;
+
+	irq_val = readl(sdev->base + DMA_IRQ_EN(irq_offset));
+	irq_val |= DMA_IRQ_QUEUE << (irq_offset * DMA_IRQ_CHAN_WIDTH);
+	writel(irq_val, sdev->base + DMA_IRQ_EN(irq_offset));
+
+	writel(pchan->desc->p_lli, pchan->base + DMA_CHAN_LLI_ADDR);
+	writel(DMA_CHAN_ENABLE_START, pchan->base + DMA_CHAN_ENABLE);
+
+	sun6i_dma_dump_com_regs(sdev);
+	sun6i_dma_dump_chan_regs(sdev, pchan);
+
+	return 0;
+}
+
+static void sun6i_dma_tasklet(unsigned long data)
+{
+	struct sun6i_dma_dev *sdev = (struct sun6i_dma_dev *)data;
+	struct sun6i_vchan *vchan;
+	struct sun6i_pchan *pchan;
+	unsigned int pchan_alloc = 0;
+	unsigned int pchan_idx;
+
+	list_for_each_entry(vchan, &sdev->slave.channels, vc.chan.device_node) {
+		spin_lock_irq(&vchan->vc.lock);
+
+		pchan = vchan->phy;
+
+		if (pchan && pchan->done) {
+			if (sun6i_dma_start_desc(vchan)) {
+				/*
+				 * No current txd associated with this channel
+				 */
+				dev_dbg(sdev->slave.dev, "pchan %u: free\n",
+					pchan->idx);
+
+				/* Mark this channel free */
+				vchan->phy = NULL;
+				pchan->vchan = NULL;
+			}
+		}
+		spin_unlock_irq(&vchan->vc.lock);
+	}
+
+	spin_lock_irq(&sdev->lock);
+	for (pchan_idx = 0; pchan_idx < NR_MAX_CHANNELS; pchan_idx++) {
+		pchan = &sdev->pchans[pchan_idx];
+
+		if (pchan->vchan || list_empty(&sdev->pending))
+			continue;
+
+		vchan = list_first_entry(&sdev->pending,
+					 struct sun6i_vchan, node);
+
+		/* Remove from pending channels */
+		list_del_init(&vchan->node);
+		pchan_alloc |= BIT(pchan_idx);
+
+		/* Mark this channel allocated */
+		pchan->vchan = vchan;
+		vchan->phy = pchan;
+		dev_dbg(sdev->slave.dev, "pchan %u: alloc vchan %p\n",
+			pchan->idx, &vchan->vc);
+	}
+	spin_unlock_irq(&sdev->lock);
+
+	for (pchan_idx = 0; pchan_idx < NR_MAX_CHANNELS; pchan_idx++) {
+		if (!(pchan_alloc & BIT(pchan_idx)))
+			continue;
+
+		pchan = sdev->pchans + pchan_idx;
+		vchan = pchan->vchan;
+		if (vchan) {
+			spin_lock_irq(&vchan->vc.lock);
+			sun6i_dma_start_desc(vchan);
+			spin_unlock_irq(&vchan->vc.lock);
+		}
+	}
+}
+
+static irqreturn_t sun6i_dma_interrupt(int irq, void *dev_id)
+{
+	struct sun6i_dma_dev *sdev = dev_id;
+	struct sun6i_vchan *vchan;
+	struct sun6i_pchan *pchan;
+	int i, j, ret = IRQ_NONE;
+	u32 status;
+
+	for (i = 0; i < 2; i++) {
+		status = readl(sdev->base + DMA_IRQ_STAT(i));
+		if (!status)
+			continue;
+
+		dev_dbg(sdev->slave.dev, "DMA irq status %s: 0x%x\n",
+			i ? "high" : "low", status);
+
+		writel(status, sdev->base + DMA_IRQ_STAT(i));
+
+		for (j = 0; (j < 8) && status; j++) {
+			if (status & DMA_IRQ_QUEUE) {
+				pchan = sdev->pchans + j;
+				vchan = pchan->vchan;
+
+				if (vchan) {
+					spin_lock(&vchan->vc.lock);
+					vchan_cookie_complete(&pchan->desc->vd);
+					pchan->done = pchan->desc;
+					spin_unlock(&vchan->vc.lock);
+				}
+			}
+
+			status = status >> 4;
+		}
+
+		if (!atomic_read(&sdev->tasklet_shutdown))
+			tasklet_schedule(&sdev->task);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy(
+		struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
+		size_t len, unsigned long flags)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	struct dma_slave_config *sconfig = &vchan->cfg;
+	struct sun6i_dma_lli *v_lli;
+	struct sun6i_desc *txd;
+	dma_addr_t p_lli;
+	int ret;
+
+	dev_dbg(chan2dev(chan),
+		"%s; chan: %d, dest: %pad, src: %pad, len: %zu. flags: 0x%08lx\n",
+		__func__, vchan->vc.chan.chan_id, &dest, &src, len, flags);
+
+	if (!len)
+		return NULL;
+
+	txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
+	if (!txd)
+		return NULL;
+
+	v_lli = dma_pool_alloc(sdev->pool, GFP_NOWAIT, &p_lli);
+	if (!v_lli) {
+		dev_err(sdev->slave.dev, "Failed to alloc lli memory\n");
+		goto err_txd_free;
+	}
+
+	ret = sun6i_dma_cfg_lli(v_lli, src, dest, len, sconfig);
+	if (ret)
+		goto err_dma_free;
+
+	v_lli->cfg |= DMA_CHAN_CFG_SRC_DRQ(DRQ_SDRAM) |
+		DMA_CHAN_CFG_DST_DRQ(DRQ_SDRAM) |
+		DMA_CHAN_CFG_DST_LINEAR_MODE |
+		DMA_CHAN_CFG_SRC_LINEAR_MODE;
+
+	sun6i_dma_lli_add(NULL, v_lli, p_lli, txd);
+
+	sun6i_dma_dump_lli(vchan, v_lli);
+
+	return vchan_tx_prep(&vchan->vc, &txd->vd, flags);
+
+err_dma_free:
+	dma_pool_free(sdev->pool, v_lli, p_lli);
+err_txd_free:
+	kfree(txd);
+	return NULL;
+}
+
+static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
+		struct dma_chan *chan, struct scatterlist *sgl,
+		unsigned int sg_len, enum dma_transfer_direction dir,
+		unsigned long flags, void *context)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	struct dma_slave_config *sconfig = &vchan->cfg;
+	struct sun6i_dma_lli *v_lli, *prev = NULL;
+	struct sun6i_desc *txd;
+	struct scatterlist *sg;
+	dma_addr_t p_lli;
+	int i, ret;
+
+	if (!sgl)
+		return NULL;
+
+	if (!is_slave_direction(dir)) {
+		dev_err(chan2dev(chan), "Invalid DMA direction\n");
+		return NULL;
+	}
+
+	txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
+	if (!txd)
+		return NULL;
+
+	for_each_sg(sgl, sg, sg_len, i) {
+		v_lli = dma_pool_alloc(sdev->pool, GFP_NOWAIT, &p_lli);
+		if (!v_lli)
+			goto err_lli_free;
+
+		if (dir == DMA_MEM_TO_DEV) {
+			ret = sun6i_dma_cfg_lli(v_lli, sg_dma_address(sg),
+						sconfig->dst_addr, sg_dma_len(sg),
+						sconfig);
+			if (ret)
+				goto err_cur_lli_free;
+
+			v_lli->cfg |= DMA_CHAN_CFG_DST_IO_MODE |
+				DMA_CHAN_CFG_SRC_LINEAR_MODE |
+				DMA_CHAN_CFG_SRC_DRQ(DRQ_SDRAM) |
+				DMA_CHAN_CFG_DST_DRQ(vchan->port);
+
+			dev_dbg(chan2dev(chan),
+				"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
+				__func__, vchan->vc.chan.chan_id,
+				&sconfig->dst_addr, &sg_dma_address(sg),
+				sg_dma_len(sg), flags);
+
+		} else {
+			ret = sun6i_dma_cfg_lli(v_lli, sconfig->src_addr,
+						sg_dma_address(sg), sg_dma_len(sg),
+						sconfig);
+			if (ret)
+				goto err_cur_lli_free;
+
+			v_lli->cfg |= DMA_CHAN_CFG_DST_LINEAR_MODE |
+				DMA_CHAN_CFG_SRC_IO_MODE |
+				DMA_CHAN_CFG_DST_DRQ(DRQ_SDRAM) |
+				DMA_CHAN_CFG_SRC_DRQ(vchan->port);
+
+			dev_dbg(chan2dev(chan),
+				"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
+				__func__, vchan->vc.chan.chan_id,
+				&sg_dma_address(sg), &sconfig->src_addr,
+				sg_dma_len(sg), flags);
+		}
+
+		prev = sun6i_dma_lli_add(prev, v_lli, p_lli, txd);
+	}
+
+	dev_dbg(chan2dev(chan), "First: %pad\n", &txd->p_lli);
+	for (prev = txd->v_lli; prev; prev = prev->v_lli_next)
+		sun6i_dma_dump_lli(vchan, prev);
+
+	return vchan_tx_prep(&vchan->vc, &txd->vd, flags);
+
+err_cur_lli_free:
+	dma_pool_free(sdev->pool, v_lli, p_lli);
+err_lli_free:
+	for (prev = txd->v_lli; prev; prev = prev->v_lli_next)
+		dma_pool_free(sdev->pool, prev, virt_to_phys(prev));
+	kfree(txd);
+	return NULL;
+}
+
+static int sun6i_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+		       unsigned long arg)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	struct sun6i_pchan *pchan = vchan->phy;
+	unsigned long flags;
+	int ret = 0;
+
+	switch (cmd) {
+	case DMA_RESUME:
+		dev_dbg(chan2dev(chan), "vchan %p: resume\n", &vchan->vc);
+
+		spin_lock_irqsave(&vchan->vc.lock, flags);
+
+		if (pchan) {
+			writel(DMA_CHAN_PAUSE_RESUME,
+			       pchan->base + DMA_CHAN_PAUSE);
+		} else if (!list_empty(&vchan->vc.desc_issued)) {
+			spin_lock(&sdev->lock);
+			list_add_tail(&vchan->node, &sdev->pending);
+			spin_unlock(&sdev->lock);
+		}
+
+		spin_unlock_irqrestore(&vchan->vc.lock, flags);
+		break;
+
+	case DMA_PAUSE:
+		dev_dbg(chan2dev(chan), "vchan %p: pause\n", &vchan->vc);
+
+		if (pchan) {
+			writel(DMA_CHAN_PAUSE_PAUSE,
+			       pchan->base + DMA_CHAN_PAUSE);
+		} else {
+			spin_lock(&sdev->lock);
+			list_del_init(&vchan->node);
+			spin_unlock(&sdev->lock);
+		}
+		break;
+
+	case DMA_TERMINATE_ALL:
+		ret = sun6i_dma_terminate_all(vchan);
+		break;
+	case DMA_SLAVE_CONFIG:
+		memcpy(&vchan->cfg, (void *)arg, sizeof(struct dma_slave_config));
+		break;
+	default:
+		ret = -ENXIO;
+		break;
+	}
+	return ret;
+}
+
+static enum dma_status sun6i_dma_tx_status(struct dma_chan *chan,
+					   dma_cookie_t cookie,
+					   struct dma_tx_state *state)
+{
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	struct sun6i_pchan *pchan = vchan->phy;
+	struct sun6i_dma_lli *lli;
+	struct virt_dma_desc *vd;
+	struct sun6i_desc *txd;
+	enum dma_status ret;
+	unsigned long flags;
+	size_t bytes = 0;
+
+	ret = dma_cookie_status(chan, cookie, state);
+	if (ret == DMA_COMPLETE)
+		return ret;
+
+	spin_lock_irqsave(&vchan->vc.lock, flags);
+
+	vd = vchan_find_desc(&vchan->vc, cookie);
+	txd = to_sun6i_desc(&vd->tx);
+
+	if (vd) {
+		for (lli = txd->v_lli; lli != NULL; lli = lli->v_lli_next)
+			bytes += lli->len;
+	} else if (!pchan || !pchan->desc) {
+		bytes = 0;
+	} else {
+		bytes = readl(pchan->base + DMA_CHAN_CUR_CNT);
+	}
+
+	spin_unlock_irqrestore(&vchan->vc.lock, flags);
+
+	dma_set_residue(state, bytes);
+
+	return ret;
+}
+
+static void sun6i_dma_issue_pending(struct dma_chan *chan)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	unsigned long flags;
+
+	spin_lock_irqsave(&vchan->vc.lock, flags);
+
+	if (vchan_issue_pending(&vchan->vc)) {
+		spin_lock(&sdev->lock);
+
+		if (!vchan->phy && list_empty(&vchan->node)) {
+			list_add_tail(&vchan->node, &sdev->pending);
+			tasklet_schedule(&sdev->task);
+			dev_dbg(chan2dev(chan), "vchan %p: issued\n",
+				&vchan->vc);
+		}
+
+		spin_unlock(&sdev->lock);
+	} else {
+		dev_dbg(chan2dev(chan), "vchan %p: nothing to issue\n",
+			&vchan->vc);
+	}
+
+	spin_unlock_irqrestore(&vchan->vc.lock, flags);
+}
+
+static int sun6i_dma_alloc_chan_resources(struct dma_chan *chan)
+{
+	return 0;
+}
+
+static void sun6i_dma_free_chan_resources(struct dma_chan *chan)
+{
+	struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
+	struct sun6i_vchan *vchan = to_sun6i_vchan(chan);
+	unsigned long flags;
+
+	spin_lock_irqsave(&sdev->lock, flags);
+	list_del_init(&vchan->node);
+	spin_unlock_irqrestore(&sdev->lock, flags);
+
+	vchan_free_chan_resources(&vchan->vc);
+}
+
+static struct dma_chan *sun6i_dma_of_xlate(struct of_phandle_args *dma_spec,
+					   struct of_dma *ofdma)
+{
+	struct sun6i_dma_dev *sdev = ofdma->of_dma_data;
+	struct sun6i_vchan *vchan;
+	struct dma_chan *chan;
+	u8 port = dma_spec->args[0];
+
+	if (port > NR_MAX_REQUESTS)
+		return NULL;
+
+	chan = dma_get_any_slave_channel(&sdev->slave);
+	if (!chan)
+		return NULL;
+
+	vchan = to_sun6i_vchan(chan);
+	vchan->port = port;
+
+	return chan;
+}
+
+static inline void sun6i_kill_tasklet(struct sun6i_dma_dev *sdev)
+{
+	/* Disable all interrupts from DMA */
+	writel(0, sdev->base + DMA_IRQ_EN(0));
+	writel(0, sdev->base + DMA_IRQ_EN(1));
+
+	/* Prevent spurious interrupts from scheduling the tasklet */
+	atomic_inc(&sdev->tasklet_shutdown);
+
+	/* Make sure we won't have any further interrupts */
+	devm_free_irq(sdev->slave.dev, sdev->irq, sdev);
+
+	/* Actually prevent the tasklet from being scheduled */
+	tasklet_kill(&sdev->task);
+}
+
+static inline void sun6i_dma_free(struct sun6i_dma_dev *sdev)
+{
+	int i;
+
+	for (i = 0; i < NR_MAX_VCHANS; i++) {
+		struct sun6i_vchan *vchan = &sdev->vchans[i];
+
+		list_del(&vchan->vc.chan.device_node);
+		tasklet_kill(&vchan->vc.task);
+	}
+}
+
+static int sun6i_dma_probe(struct platform_device *pdev)
+{
+	struct sun6i_dma_dev *sdc;
+	struct resource *res;
+	struct clk *mux, *pll6;
+	int ret, i;
+
+	sdc = devm_kzalloc(&pdev->dev, sizeof(*sdc), GFP_KERNEL);
+	if (!sdc)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	sdc->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(sdc->base))
+		return PTR_ERR(sdc->base);
+
+	sdc->irq = platform_get_irq(pdev, 0);
+	if (sdc->irq < 0) {
+		dev_err(&pdev->dev, "Cannot claim IRQ\n");
+		return sdc->irq;
+	}
+
+	sdc->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(sdc->clk)) {
+		dev_err(&pdev->dev, "No clock specified\n");
+		return PTR_ERR(sdc->clk);
+	}
+
+	mux = clk_get(NULL, "ahb1_mux");
+	if (IS_ERR(mux)) {
+		dev_err(&pdev->dev, "Couldn't get AHB1 Mux\n");
+		return PTR_ERR(mux);
+	}
+
+	pll6 = clk_get(NULL, "pll6");
+	if (IS_ERR(pll6)) {
+		dev_err(&pdev->dev, "Couldn't get PLL6\n");
+		clk_put(mux);
+		return PTR_ERR(pll6);
+	}
+
+	ret = clk_set_parent(mux, pll6);
+	clk_put(pll6);
+	clk_put(mux);
+
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't reparent AHB1 on PLL6\n");
+		return ret;
+	}
+
+	sdc->rstc = devm_reset_control_get(&pdev->dev, NULL);
+	if (IS_ERR(sdc->rstc)) {
+		dev_err(&pdev->dev, "No reset controller specified\n");
+		return PTR_ERR(sdc->rstc);
+	}
+
+	sdc->pool = dmam_pool_create(dev_name(&pdev->dev), &pdev->dev,
+				     sizeof(struct sun6i_dma_lli), 4, 0);
+	if (!sdc->pool) {
+		dev_err(&pdev->dev, "No memory for descriptors dma pool\n");
+		return -ENOMEM;
+	}
+
+	platform_set_drvdata(pdev, sdc);
+	INIT_LIST_HEAD(&sdc->pending);
+	spin_lock_init(&sdc->lock);
+
+	dma_cap_set(DMA_PRIVATE, sdc->slave.cap_mask);
+	dma_cap_set(DMA_MEMCPY, sdc->slave.cap_mask);
+	dma_cap_set(DMA_SLAVE, sdc->slave.cap_mask);
+
+	INIT_LIST_HEAD(&sdc->slave.channels);
+	sdc->slave.device_alloc_chan_resources	= sun6i_dma_alloc_chan_resources;
+	sdc->slave.device_free_chan_resources	= sun6i_dma_free_chan_resources;
+	sdc->slave.device_tx_status		= sun6i_dma_tx_status;
+	sdc->slave.device_issue_pending		= sun6i_dma_issue_pending;
+	sdc->slave.device_prep_slave_sg		= sun6i_dma_prep_slave_sg;
+	sdc->slave.device_prep_dma_memcpy	= sun6i_dma_prep_dma_memcpy;
+	sdc->slave.device_control		= sun6i_dma_control;
+	sdc->slave.chancnt			= NR_MAX_VCHANS;
+
+	sdc->slave.dev = &pdev->dev;
+
+	sdc->pchans = devm_kcalloc(&pdev->dev, NR_MAX_CHANNELS,
+				   sizeof(struct sun6i_pchan), GFP_KERNEL);
+	if (!sdc->pchans)
+		return -ENOMEM;
+
+	sdc->vchans = devm_kcalloc(&pdev->dev, NR_MAX_VCHANS,
+				   sizeof(struct sun6i_vchan), GFP_KERNEL);
+	if (!sdc->vchans)
+		return -ENOMEM;
+
+	tasklet_init(&sdc->task, sun6i_dma_tasklet, (unsigned long)sdc);
+
+	for (i = 0; i < NR_MAX_CHANNELS; i++) {
+		struct sun6i_pchan *pchan = &sdc->pchans[i];
+
+		pchan->idx = i;
+		pchan->base = sdc->base + 0x100 + i * 0x40;
+	}
+
+	for (i = 0; i < NR_MAX_VCHANS; i++) {
+		struct sun6i_vchan *vchan = &sdc->vchans[i];
+
+		INIT_LIST_HEAD(&vchan->node);
+		vchan->vc.desc_free = sun6i_dma_free_desc;
+		vchan_init(&vchan->vc, &sdc->slave);
+	}
+
+	ret = reset_control_deassert(sdc->rstc);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't deassert the device from reset\n");
+		goto err_chan_free;
+	}
+
+	ret = clk_prepare_enable(sdc->clk);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't enable the clock\n");
+		goto err_reset_assert;
+	}
+
+	ret = devm_request_irq(&pdev->dev, sdc->irq, sun6i_dma_interrupt, 0,
+			       dev_name(&pdev->dev), sdc);
+	if (ret) {
+		dev_err(&pdev->dev, "Cannot request IRQ\n");
+		goto err_clk_disable;
+	}
+
+	ret = dma_async_device_register(&sdc->slave);
+	if (ret) {
+		dev_warn(&pdev->dev, "Failed to register DMA engine device\n");
+		goto err_irq_disable;
+	}
+
+	ret = of_dma_controller_register(pdev->dev.of_node, sun6i_dma_of_xlate,
+					 sdc);
+	if (ret) {
+		dev_err(&pdev->dev, "of_dma_controller_register failed\n");
+		goto err_dma_unregister;
+	}
+
+	return 0;
+
+err_dma_unregister:
+	dma_async_device_unregister(&sdc->slave);
+err_irq_disable:
+	sun6i_kill_tasklet(sdc);
+err_clk_disable:
+	clk_disable_unprepare(sdc->clk);
+err_reset_assert:
+	reset_control_assert(sdc->rstc);
+err_chan_free:
+	sun6i_dma_free(sdc);
+	return ret;
+}
+
+static int sun6i_dma_remove(struct platform_device *pdev)
+{
+	struct sun6i_dma_dev *sdc = platform_get_drvdata(pdev);
+
+	of_dma_controller_free(pdev->dev.of_node);
+	dma_async_device_unregister(&sdc->slave);
+
+	sun6i_kill_tasklet(sdc);
+
+	clk_disable_unprepare(sdc->clk);
+	reset_control_assert(sdc->rstc);
+
+	sun6i_dma_free(sdc);
+
+	return 0;
+}
+
+static struct of_device_id sun6i_dma_match[] = {
+	{ .compatible = "allwinner,sun6i-a31-dma" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver sun6i_dma_driver = {
+	.probe		= sun6i_dma_probe,
+	.remove		= sun6i_dma_remove,
+	.driver = {
+		.name		= "sun6i-dma",
+		.of_match_table	= sun6i_dma_match,
+	},
+};
+module_platform_driver(sun6i_dma_driver);
+
+MODULE_DESCRIPTION("Allwinner A31 DMA Controller Driver");
+MODULE_AUTHOR("Sugar <shuge@allwinnertech.com>");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 03ad64e..16efa60 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -1055,7 +1055,7 @@
 static struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
 	struct dma_chan *dc, dma_addr_t buf_addr, size_t buf_len,
 	size_t period_len, enum dma_transfer_direction direction,
-	unsigned long flags, void *context)
+	unsigned long flags)
 {
 	struct tegra_dma_channel *tdc = to_tegra_dma_chan(dc);
 	struct tegra_dma_desc *dma_desc = NULL;
diff --git a/drivers/edac/cell_edac.c b/drivers/edac/cell_edac.c
index 374b57f..a12c855 100644
--- a/drivers/edac/cell_edac.c
+++ b/drivers/edac/cell_edac.c
@@ -134,8 +134,7 @@
 	int				j;
 	u32				nr_pages;
 
-	for (np = NULL;
-	     (np = of_find_node_by_name(np, "memory")) != NULL;) {
+	for_each_node_by_name(np, "memory") {
 		struct resource r;
 
 		/* We "know" that the Cell firmware only creates one entry
diff --git a/drivers/hwmon/adm1025.c b/drivers/hwmon/adm1025.c
index d3d0e8c..d6c767a 100644
--- a/drivers/hwmon/adm1025.c
+++ b/drivers/hwmon/adm1025.c
@@ -382,6 +382,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c
index ca8430f..e67b9a5 100644
--- a/drivers/hwmon/adm1026.c
+++ b/drivers/hwmon/adm1026.c
@@ -1085,6 +1085,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/ads1015.c b/drivers/hwmon/ads1015.c
index 22e0c92..1265164 100644
--- a/drivers/hwmon/ads1015.c
+++ b/drivers/hwmon/ads1015.c
@@ -212,6 +212,7 @@
 				dev_err(&client->dev,
 					"invalid gain on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}
 
@@ -222,6 +223,7 @@
 				dev_err(&client->dev,
 					"invalid data_rate on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}
 
diff --git a/drivers/hwmon/asb100.c b/drivers/hwmon/asb100.c
index f960636..272fcc8 100644
--- a/drivers/hwmon/asb100.c
+++ b/drivers/hwmon/asb100.c
@@ -510,6 +510,10 @@
 	err = kstrtoul(buf, 10, &val);
 	if (err)
 		return err;
+
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
index 4ae3fff..bea0a34 100644
--- a/drivers/hwmon/dme1737.c
+++ b/drivers/hwmon/dme1737.c
@@ -247,8 +247,8 @@
 	u8  pwm_acz[3];
 	u8  pwm_freq[6];
 	u8  pwm_rr[2];
-	u8  zone_low[3];
-	u8  zone_abs[3];
+	s8  zone_low[3];
+	s8  zone_abs[3];
 	u8  zone_hyst[2];
 	u32 alarms;
 };
@@ -277,7 +277,7 @@
 	return (reg * nominal + (3 << (res - 3))) / (3 << (res - 2));
 }
 
-static inline int IN_TO_REG(int val, int nominal)
+static inline int IN_TO_REG(long val, int nominal)
 {
 	return clamp_val((val * 192 + nominal / 2) / nominal, 0, 255);
 }
@@ -293,7 +293,7 @@
 	return (reg * 1000) >> (res - 8);
 }
 
-static inline int TEMP_TO_REG(int val)
+static inline int TEMP_TO_REG(long val)
 {
 	return clamp_val((val < 0 ? val - 500 : val + 500) / 1000, -128, 127);
 }
@@ -308,7 +308,7 @@
 	return TEMP_RANGE[(reg >> 4) & 0x0f];
 }
 
-static int TEMP_RANGE_TO_REG(int val, int reg)
+static int TEMP_RANGE_TO_REG(long val, int reg)
 {
 	int i;
 
@@ -331,7 +331,7 @@
 	return (((ix == 1) ? reg : reg >> 4) & 0x0f) * 1000;
 }
 
-static inline int TEMP_HYST_TO_REG(int val, int ix, int reg)
+static inline int TEMP_HYST_TO_REG(long val, int ix, int reg)
 {
 	int hyst = clamp_val((val + 500) / 1000, 0, 15);
 
@@ -347,7 +347,7 @@
 		return (reg == 0 || reg == 0xffff) ? 0 : 90000 * 60 / reg;
 }
 
-static inline int FAN_TO_REG(int val, int tpc)
+static inline int FAN_TO_REG(long val, int tpc)
 {
 	if (tpc) {
 		return clamp_val(val / tpc, 0, 0xffff);
@@ -379,7 +379,7 @@
 	return (edge > 0) ? 1 << (edge - 1) : 0;
 }
 
-static inline int FAN_TYPE_TO_REG(int val, int reg)
+static inline int FAN_TYPE_TO_REG(long val, int reg)
 {
 	int edge = (val == 4) ? 3 : val;
 
@@ -402,7 +402,7 @@
 	return 1000 + i * 500;
 }
 
-static int FAN_MAX_TO_REG(int val)
+static int FAN_MAX_TO_REG(long val)
 {
 	int i;
 
@@ -460,7 +460,7 @@
 	return acz[(reg >> 5) & 0x07];
 }
 
-static inline int PWM_ACZ_TO_REG(int val, int reg)
+static inline int PWM_ACZ_TO_REG(long val, int reg)
 {
 	int acz = (val == 4) ? 2 : val - 1;
 
@@ -476,7 +476,7 @@
 	return PWM_FREQ[reg & 0x0f];
 }
 
-static int PWM_FREQ_TO_REG(int val, int reg)
+static int PWM_FREQ_TO_REG(long val, int reg)
 {
 	int i;
 
@@ -510,7 +510,7 @@
 	return (rr & 0x08) ? PWM_RR[rr & 0x07] : 0;
 }
 
-static int PWM_RR_TO_REG(int val, int ix, int reg)
+static int PWM_RR_TO_REG(long val, int ix, int reg)
 {
 	int i;
 
@@ -528,7 +528,7 @@
 	return PWM_RR_FROM_REG(reg, ix) ? 1 : 0;
 }
 
-static inline int PWM_RR_EN_TO_REG(int val, int ix, int reg)
+static inline int PWM_RR_EN_TO_REG(long val, int ix, int reg)
 {
 	int en = (ix == 1) ? 0x80 : 0x08;
 
@@ -1481,13 +1481,16 @@
 		       const char *buf, size_t count)
 {
 	struct dme1737_data *data = dev_get_drvdata(dev);
-	long val;
+	unsigned long val;
 	int err;
 
-	err = kstrtol(buf, 10, &val);
+	err = kstrtoul(buf, 10, &val);
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c
index e87da90..ada9071 100644
--- a/drivers/hwmon/emc6w201.c
+++ b/drivers/hwmon/emc6w201.c
@@ -252,12 +252,12 @@
 	if (err < 0)
 		return err;
 
-	val /= 1000;
+	val = DIV_ROUND_CLOSEST(val, 1000);
 	reg = (sf == min) ? EMC6W201_REG_TEMP_LOW(nr)
 			  : EMC6W201_REG_TEMP_HIGH(nr);
 
 	mutex_lock(&data->update_lock);
-	data->temp[sf][nr] = clamp_val(val, -127, 128);
+	data->temp[sf][nr] = clamp_val(val, -127, 127);
 	err = emc6w201_write8(client, reg, data->temp[sf][nr]);
 	mutex_unlock(&data->update_lock);
 
diff --git a/drivers/hwmon/hih6130.c b/drivers/hwmon/hih6130.c
index 0e01c4e..7b73d20 100644
--- a/drivers/hwmon/hih6130.c
+++ b/drivers/hwmon/hih6130.c
@@ -238,6 +238,9 @@
 	hih6130->client = client;
 	mutex_init(&hih6130->lock);
 
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_QUICK))
+		hih6130->write_length = 1;
+
 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 							   hih6130,
 							   hih6130_groups);
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index ba1d83d..a5e2958 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -617,6 +617,10 @@
 	err = kstrtoul(buf, 10, &val);
 	if (err)
 		return err;
+
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
index d2060e2..cfaf70b 100644
--- a/drivers/hwmon/lm92.c
+++ b/drivers/hwmon/lm92.c
@@ -74,12 +74,9 @@
 	return reg / 8 * 625 / 10;
 }
 
-static inline s16 TEMP_TO_REG(int val)
+static inline s16 TEMP_TO_REG(long val)
 {
-	if (val <= -60000)
-		return -60000 * 10 / 625 * 8;
-	if (val >= 160000)
-		return 160000 * 10 / 625 * 8;
+	val = clamp_val(val, -60000, 160000);
 	return val * 10 / 625 * 8;
 }
 
@@ -206,10 +203,12 @@
 	if (err)
 		return err;
 
+	val = clamp_val(val, -120000, 220000);
 	mutex_lock(&data->update_lock);
-	data->temp[t_hyst] = TEMP_FROM_REG(data->temp[attr->index]) - val;
+	 data->temp[t_hyst] =
+		TEMP_TO_REG(TEMP_FROM_REG(data->temp[attr->index]) - val);
 	i2c_smbus_write_word_swapped(client, LM92_REG_TEMP_HYST,
-				     TEMP_TO_REG(data->temp[t_hyst]));
+				     data->temp[t_hyst]);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
diff --git a/drivers/hwmon/pc87360.c b/drivers/hwmon/pc87360.c
index 988181e..145f674 100644
--- a/drivers/hwmon/pc87360.c
+++ b/drivers/hwmon/pc87360.c
@@ -615,6 +615,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/tmp103.c b/drivers/hwmon/tmp103.c
index c74d2da..e42964f 100644
--- a/drivers/hwmon/tmp103.c
+++ b/drivers/hwmon/tmp103.c
@@ -131,13 +131,6 @@
 	struct regmap *regmap;
 	int ret;
 
-	if (!i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_BYTE_DATA)) {
-		dev_err(&client->dev,
-			"adapter doesn't support SMBus byte transactions\n");
-		return -ENODEV;
-	}
-
 	regmap = devm_regmap_init_i2c(client, &tmp103_regmap_config);
 	if (IS_ERR(regmap)) {
 		dev_err(dev, "failed to allocate register map\n");
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
index 344b22e..3ea57c3 100644
--- a/drivers/hwmon/vt1211.c
+++ b/drivers/hwmon/vt1211.c
@@ -879,6 +879,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 
 	return count;
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index c1726be..2f55973 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -820,6 +820,9 @@
 	err = kstrtoul(buf, 10, &val);
 	if (err)
 		return err;
+
+	if (val > 255)
+		return -EINVAL;
 	data->vrm = val;
 
 	return count;
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index cb3765f..001df85 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -1181,6 +1181,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 9d63d71..816aa6c 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -353,6 +353,9 @@
 	if (err)
 		return err;
 
+	if (val > 255)
+		return -EINVAL;
+
 	data->vrm = val;
 	return count;
 }
diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
index 70637d2..3612cb5 100644
--- a/drivers/hwspinlock/Kconfig
+++ b/drivers/hwspinlock/Kconfig
@@ -10,7 +10,7 @@
 
 config HWSPINLOCK_OMAP
 	tristate "OMAP Hardware Spinlock device"
-	depends on ARCH_OMAP4 || SOC_OMAP5
+	depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX || SOC_AM33XX || SOC_AM43XX
 	select HWSPINLOCK
 	help
 	  Say y here to support the OMAP Hardware Spinlock device (firstly
diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c
index 292869c..c1e2cd4 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -98,10 +98,29 @@
 	if (!io_base)
 		return -ENOMEM;
 
+	/*
+	 * make sure the module is enabled and clocked before reading
+	 * the module SYSSTATUS register
+	 */
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_get_sync(&pdev->dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(&pdev->dev);
+		goto iounmap_base;
+	}
+
 	/* Determine number of locks */
 	i = readl(io_base + SYSSTATUS_OFFSET);
 	i >>= SPINLOCK_NUMLOCKS_BIT_OFFSET;
 
+	/*
+	 * runtime PM will make sure the clock of this module is
+	 * enabled again iff at least one lock is requested
+	 */
+	ret = pm_runtime_put(&pdev->dev);
+	if (ret < 0)
+		goto iounmap_base;
+
 	/* one of the four lsb's must be set, and nothing else */
 	if (hweight_long(i & 0xf) != 1 || i > 8) {
 		ret = -EINVAL;
@@ -121,12 +140,6 @@
 	for (i = 0, hwlock = &bank->lock[0]; i < num_locks; i++, hwlock++)
 		hwlock->priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
 
-	/*
-	 * runtime PM will make sure the clock of this module is
-	 * enabled iff at least one lock is requested
-	 */
-	pm_runtime_enable(&pdev->dev);
-
 	ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
 						pdata->base_id, num_locks);
 	if (ret)
@@ -135,9 +148,9 @@
 	return 0;
 
 reg_fail:
-	pm_runtime_disable(&pdev->dev);
 	kfree(bank);
 iounmap_base:
+	pm_runtime_disable(&pdev->dev);
 	iounmap(io_base);
 	return ret;
 }
diff --git a/drivers/infiniband/core/agent.c b/drivers/infiniband/core/agent.c
index 2bc7f5a..f6d2961 100644
--- a/drivers/infiniband/core/agent.c
+++ b/drivers/infiniband/core/agent.c
@@ -94,14 +94,14 @@
 		port_priv = ib_get_agent_port(device, port_num);
 
 	if (!port_priv) {
-		printk(KERN_ERR SPFX "Unable to find port agent\n");
+		dev_err(&device->dev, "Unable to find port agent\n");
 		return;
 	}
 
 	agent = port_priv->agent[qpn];
 	ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
 	if (IS_ERR(ah)) {
-		printk(KERN_ERR SPFX "ib_create_ah_from_wc error %ld\n",
+		dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
 			PTR_ERR(ah));
 		return;
 	}
@@ -110,7 +110,7 @@
 				      IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
 				      GFP_KERNEL);
 	if (IS_ERR(send_buf)) {
-		printk(KERN_ERR SPFX "ib_create_send_mad error\n");
+		dev_err(&device->dev, "ib_create_send_mad error\n");
 		goto err1;
 	}
 
@@ -125,7 +125,7 @@
 	}
 
 	if (ib_post_send_mad(send_buf, NULL)) {
-		printk(KERN_ERR SPFX "ib_post_send_mad error\n");
+		dev_err(&device->dev, "ib_post_send_mad error\n");
 		goto err2;
 	}
 	return;
@@ -151,7 +151,7 @@
 	/* Create new device info */
 	port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
 	if (!port_priv) {
-		printk(KERN_ERR SPFX "No memory for ib_agent_port_private\n");
+		dev_err(&device->dev, "No memory for ib_agent_port_private\n");
 		ret = -ENOMEM;
 		goto error1;
 	}
@@ -161,7 +161,7 @@
 		port_priv->agent[0] = ib_register_mad_agent(device, port_num,
 							    IB_QPT_SMI, NULL, 0,
 							    &agent_send_handler,
-							    NULL, NULL);
+							    NULL, NULL, 0);
 		if (IS_ERR(port_priv->agent[0])) {
 			ret = PTR_ERR(port_priv->agent[0]);
 			goto error2;
@@ -172,7 +172,7 @@
 	port_priv->agent[1] = ib_register_mad_agent(device, port_num,
 						    IB_QPT_GSI, NULL, 0,
 						    &agent_send_handler,
-						    NULL, NULL);
+						    NULL, NULL, 0);
 	if (IS_ERR(port_priv->agent[1])) {
 		ret = PTR_ERR(port_priv->agent[1]);
 		goto error3;
@@ -202,7 +202,7 @@
 	port_priv = __ib_get_agent_port(device, port_num);
 	if (port_priv == NULL) {
 		spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
-		printk(KERN_ERR SPFX "Port %d not found\n", port_num);
+		dev_err(&device->dev, "Port %d not found\n", port_num);
 		return -ENODEV;
 	}
 	list_del(&port_priv->port_list);
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c323917..e28a494 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3753,7 +3753,7 @@
 	struct cm_port *port;
 	struct ib_mad_reg_req reg_req = {
 		.mgmt_class = IB_MGMT_CLASS_CM,
-		.mgmt_class_version = IB_CM_CLASS_VERSION
+		.mgmt_class_version = IB_CM_CLASS_VERSION,
 	};
 	struct ib_port_modify port_modify = {
 		.set_port_cap_mask = IB_PORT_CM_SUP
@@ -3801,7 +3801,8 @@
 							0,
 							cm_send_handler,
 							cm_recv_handler,
-							port);
+							port,
+							0);
 		if (IS_ERR(port->mad_agent))
 			goto error2;
 
diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
index 3d2e489..ff9163d 100644
--- a/drivers/infiniband/core/iwcm.c
+++ b/drivers/infiniband/core/iwcm.c
@@ -46,6 +46,7 @@
 #include <linux/completion.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/sysctl.h>
 
 #include <rdma/iw_cm.h>
 #include <rdma/ib_addr.h>
@@ -65,6 +66,20 @@
 	struct list_head free_list;
 };
 
+static unsigned int default_backlog = 256;
+
+static struct ctl_table_header *iwcm_ctl_table_hdr;
+static struct ctl_table iwcm_ctl_table[] = {
+	{
+		.procname	= "default_backlog",
+		.data		= &default_backlog,
+		.maxlen		= sizeof(default_backlog),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{ }
+};
+
 /*
  * The following services provide a mechanism for pre-allocating iwcm_work
  * elements.  The design pre-allocates them  based on the cm_id type:
@@ -425,6 +440,9 @@
 
 	cm_id_priv = container_of(cm_id, struct iwcm_id_private, id);
 
+	if (!backlog)
+		backlog = default_backlog;
+
 	ret = alloc_work_entries(cm_id_priv, backlog);
 	if (ret)
 		return ret;
@@ -1030,11 +1048,20 @@
 	if (!iwcm_wq)
 		return -ENOMEM;
 
+	iwcm_ctl_table_hdr = register_net_sysctl(&init_net, "net/iw_cm",
+						 iwcm_ctl_table);
+	if (!iwcm_ctl_table_hdr) {
+		pr_err("iw_cm: couldn't register sysctl paths\n");
+		destroy_workqueue(iwcm_wq);
+		return -ENOMEM;
+	}
+
 	return 0;
 }
 
 static void __exit iw_cm_cleanup(void)
 {
+	unregister_net_sysctl_table(iwcm_ctl_table_hdr);
 	destroy_workqueue(iwcm_wq);
 }
 
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index ab31f13..74c30f4 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -33,6 +33,9 @@
  * SOFTWARE.
  *
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
 #include <linux/module.h>
@@ -195,7 +198,8 @@
 					   u8 rmpp_version,
 					   ib_mad_send_handler send_handler,
 					   ib_mad_recv_handler recv_handler,
-					   void *context)
+					   void *context,
+					   u32 registration_flags)
 {
 	struct ib_mad_port_private *port_priv;
 	struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
@@ -211,68 +215,109 @@
 
 	/* Validate parameters */
 	qpn = get_spl_qp_index(qp_type);
-	if (qpn == -1)
+	if (qpn == -1) {
+		dev_notice(&device->dev,
+			   "ib_register_mad_agent: invalid QP Type %d\n",
+			   qp_type);
 		goto error1;
+	}
 
-	if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
+	if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) {
+		dev_notice(&device->dev,
+			   "ib_register_mad_agent: invalid RMPP Version %u\n",
+			   rmpp_version);
 		goto error1;
+	}
 
 	/* Validate MAD registration request if supplied */
 	if (mad_reg_req) {
-		if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION)
+		if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) {
+			dev_notice(&device->dev,
+				   "ib_register_mad_agent: invalid Class Version %u\n",
+				   mad_reg_req->mgmt_class_version);
 			goto error1;
-		if (!recv_handler)
+		}
+		if (!recv_handler) {
+			dev_notice(&device->dev,
+				   "ib_register_mad_agent: no recv_handler\n");
 			goto error1;
+		}
 		if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
 			/*
 			 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
 			 * one in this range currently allowed
 			 */
 			if (mad_reg_req->mgmt_class !=
-			    IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+			    IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+				dev_notice(&device->dev,
+					   "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n",
+					   mad_reg_req->mgmt_class);
 				goto error1;
+			}
 		} else if (mad_reg_req->mgmt_class == 0) {
 			/*
 			 * Class 0 is reserved in IBA and is used for
 			 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
 			 */
+			dev_notice(&device->dev,
+				   "ib_register_mad_agent: Invalid Mgmt Class 0\n");
 			goto error1;
 		} else if (is_vendor_class(mad_reg_req->mgmt_class)) {
 			/*
 			 * If class is in "new" vendor range,
 			 * ensure supplied OUI is not zero
 			 */
-			if (!is_vendor_oui(mad_reg_req->oui))
+			if (!is_vendor_oui(mad_reg_req->oui)) {
+				dev_notice(&device->dev,
+					   "ib_register_mad_agent: No OUI specified for class 0x%x\n",
+					   mad_reg_req->mgmt_class);
 				goto error1;
+			}
 		}
 		/* Make sure class supplied is consistent with RMPP */
 		if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
-			if (rmpp_version)
+			if (rmpp_version) {
+				dev_notice(&device->dev,
+					   "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n",
+					   mad_reg_req->mgmt_class);
 				goto error1;
+			}
 		}
+
 		/* Make sure class supplied is consistent with QP type */
 		if (qp_type == IB_QPT_SMI) {
 			if ((mad_reg_req->mgmt_class !=
 					IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
 			    (mad_reg_req->mgmt_class !=
-					IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
+					IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
+				dev_notice(&device->dev,
+					   "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n",
+					   mad_reg_req->mgmt_class);
 				goto error1;
+			}
 		} else {
 			if ((mad_reg_req->mgmt_class ==
 					IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
 			    (mad_reg_req->mgmt_class ==
-					IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
+					IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
+				dev_notice(&device->dev,
+					   "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n",
+					   mad_reg_req->mgmt_class);
 				goto error1;
+			}
 		}
 	} else {
 		/* No registration request supplied */
 		if (!send_handler)
 			goto error1;
+		if (registration_flags & IB_MAD_USER_RMPP)
+			goto error1;
 	}
 
 	/* Validate device and port */
 	port_priv = ib_get_mad_port(device, port_num);
 	if (!port_priv) {
+		dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n");
 		ret = ERR_PTR(-ENODEV);
 		goto error1;
 	}
@@ -280,6 +325,8 @@
 	/* Verify the QP requested is supported.  For example, Ethernet devices
 	 * will not have QP0 */
 	if (!port_priv->qp_info[qpn].qp) {
+		dev_notice(&device->dev,
+			   "ib_register_mad_agent: QP %d not supported\n", qpn);
 		ret = ERR_PTR(-EPROTONOSUPPORT);
 		goto error1;
 	}
@@ -316,6 +363,7 @@
 	mad_agent_priv->agent.context = context;
 	mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
 	mad_agent_priv->agent.port_num = port_num;
+	mad_agent_priv->agent.flags = registration_flags;
 	spin_lock_init(&mad_agent_priv->lock);
 	INIT_LIST_HEAD(&mad_agent_priv->send_list);
 	INIT_LIST_HEAD(&mad_agent_priv->wait_list);
@@ -706,7 +754,7 @@
 	     smi_handle_dr_smp_send(smp, device->node_type, port_num) ==
 	     IB_SMI_DISCARD) {
 		ret = -EINVAL;
-		printk(KERN_ERR PFX "Invalid directed route\n");
+		dev_err(&device->dev, "Invalid directed route\n");
 		goto out;
 	}
 
@@ -718,7 +766,7 @@
 	local = kmalloc(sizeof *local, GFP_ATOMIC);
 	if (!local) {
 		ret = -ENOMEM;
-		printk(KERN_ERR PFX "No memory for ib_mad_local_private\n");
+		dev_err(&device->dev, "No memory for ib_mad_local_private\n");
 		goto out;
 	}
 	local->mad_priv = NULL;
@@ -726,7 +774,7 @@
 	mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC);
 	if (!mad_priv) {
 		ret = -ENOMEM;
-		printk(KERN_ERR PFX "No memory for local response MAD\n");
+		dev_err(&device->dev, "No memory for local response MAD\n");
 		kfree(local);
 		goto out;
 	}
@@ -837,9 +885,9 @@
 	for (left = send_buf->data_len + pad; left > 0; left -= seg_size) {
 		seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask);
 		if (!seg) {
-			printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem "
-			       "alloc failed for len %zd, gfp %#x\n",
-			       sizeof (*seg) + seg_size, gfp_mask);
+			dev_err(&send_buf->mad_agent->device->dev,
+				"alloc_send_rmpp_segs: RMPP mem alloc failed for len %zd, gfp %#x\n",
+				sizeof (*seg) + seg_size, gfp_mask);
 			free_send_rmpp_list(send_wr);
 			return -ENOMEM;
 		}
@@ -862,6 +910,12 @@
 	return 0;
 }
 
+int ib_mad_kernel_rmpp_agent(struct ib_mad_agent *agent)
+{
+	return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP);
+}
+EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent);
+
 struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
 					    u32 remote_qpn, u16 pkey_index,
 					    int rmpp_active,
@@ -878,10 +932,12 @@
 	pad = get_pad_size(hdr_len, data_len);
 	message_size = hdr_len + data_len + pad;
 
-	if ((!mad_agent->rmpp_version &&
-	     (rmpp_active || message_size > sizeof(struct ib_mad))) ||
-	    (!rmpp_active && message_size > sizeof(struct ib_mad)))
-		return ERR_PTR(-EINVAL);
+	if (ib_mad_kernel_rmpp_agent(mad_agent)) {
+		if (!rmpp_active && message_size > sizeof(struct ib_mad))
+			return ERR_PTR(-EINVAL);
+	} else
+		if (rmpp_active || message_size > sizeof(struct ib_mad))
+			return ERR_PTR(-EINVAL);
 
 	size = rmpp_active ? hdr_len : sizeof(struct ib_mad);
 	buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
@@ -1135,7 +1191,7 @@
 			      &mad_agent_priv->send_list);
 		spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
 
-		if (mad_agent_priv->agent.rmpp_version) {
+		if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
 			ret = ib_send_rmpp_mad(mad_send_wr);
 			if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
 				ret = ib_send_mad(mad_send_wr);
@@ -1199,7 +1255,8 @@
 int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
 		      struct ib_wc *wc)
 {
-	printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n");
+	dev_err(&mad_agent->device->dev,
+		"ib_process_mad_wc() not implemented yet\n");
 	return 0;
 }
 EXPORT_SYMBOL(ib_process_mad_wc);
@@ -1211,7 +1268,7 @@
 
 	for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) {
 		if ((*method)->agent[i]) {
-			printk(KERN_ERR PFX "Method %d already in use\n", i);
+			pr_err("Method %d already in use\n", i);
 			return -EINVAL;
 		}
 	}
@@ -1223,8 +1280,7 @@
 	/* Allocate management method table */
 	*method = kzalloc(sizeof **method, GFP_ATOMIC);
 	if (!*method) {
-		printk(KERN_ERR PFX "No memory for "
-		       "ib_mad_mgmt_method_table\n");
+		pr_err("No memory for ib_mad_mgmt_method_table\n");
 		return -ENOMEM;
 	}
 
@@ -1319,8 +1375,8 @@
 		/* Allocate management class table for "new" class version */
 		*class = kzalloc(sizeof **class, GFP_ATOMIC);
 		if (!*class) {
-			printk(KERN_ERR PFX "No memory for "
-			       "ib_mad_mgmt_class_table\n");
+			dev_err(&agent_priv->agent.device->dev,
+				"No memory for ib_mad_mgmt_class_table\n");
 			ret = -ENOMEM;
 			goto error1;
 		}
@@ -1386,8 +1442,8 @@
 		/* Allocate mgmt vendor class table for "new" class version */
 		vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
 		if (!vendor) {
-			printk(KERN_ERR PFX "No memory for "
-			       "ib_mad_mgmt_vendor_class_table\n");
+			dev_err(&agent_priv->agent.device->dev,
+				"No memory for ib_mad_mgmt_vendor_class_table\n");
 			goto error1;
 		}
 
@@ -1397,8 +1453,8 @@
 		/* Allocate table for this management vendor class */
 		vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
 		if (!vendor_class) {
-			printk(KERN_ERR PFX "No memory for "
-			       "ib_mad_mgmt_vendor_class\n");
+			dev_err(&agent_priv->agent.device->dev,
+				"No memory for ib_mad_mgmt_vendor_class\n");
 			goto error2;
 		}
 
@@ -1429,7 +1485,7 @@
 			goto check_in_use;
 		}
 	}
-	printk(KERN_ERR PFX "All OUI slots in use\n");
+	dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n");
 	goto error3;
 
 check_in_use:
@@ -1640,9 +1696,9 @@
 		if (mad_agent->agent.recv_handler)
 			atomic_inc(&mad_agent->refcount);
 		else {
-			printk(KERN_NOTICE PFX "No receive handler for client "
-			       "%p on port %d\n",
-			       &mad_agent->agent, port_priv->port_num);
+			dev_notice(&port_priv->device->dev,
+				   "No receive handler for client %p on port %d\n",
+				   &mad_agent->agent, port_priv->port_num);
 			mad_agent = NULL;
 		}
 	}
@@ -1658,8 +1714,8 @@
 
 	/* Make sure MAD base version is understood */
 	if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) {
-		printk(KERN_ERR PFX "MAD received with unsupported base "
-		       "version %d\n", mad->mad_hdr.base_version);
+		pr_err("MAD received with unsupported base version %d\n",
+			mad->mad_hdr.base_version);
 		goto out;
 	}
 
@@ -1685,6 +1741,7 @@
 
 	rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
 	return !mad_agent_priv->agent.rmpp_version ||
+		!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) ||
 		!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
 				    IB_MGMT_RMPP_FLAG_ACTIVE) ||
 		(rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
@@ -1812,7 +1869,7 @@
 
 	INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
 	list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
-	if (mad_agent_priv->agent.rmpp_version) {
+	if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
 		mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
 						      mad_recv_wc);
 		if (!mad_recv_wc) {
@@ -1827,23 +1884,39 @@
 		mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
 		if (!mad_send_wr) {
 			spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
-			ib_free_recv_mad(mad_recv_wc);
-			deref_mad_agent(mad_agent_priv);
-			return;
+			if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)
+			   && ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class)
+			   && (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr)
+					& IB_MGMT_RMPP_FLAG_ACTIVE)) {
+				/* user rmpp is in effect
+				 * and this is an active RMPP MAD
+				 */
+				mad_recv_wc->wc->wr_id = 0;
+				mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
+								   mad_recv_wc);
+				atomic_dec(&mad_agent_priv->refcount);
+			} else {
+				/* not user rmpp, revert to normal behavior and
+				 * drop the mad */
+				ib_free_recv_mad(mad_recv_wc);
+				deref_mad_agent(mad_agent_priv);
+				return;
+			}
+		} else {
+			ib_mark_mad_done(mad_send_wr);
+			spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
+
+			/* Defined behavior is to complete response before request */
+			mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
+			mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
+							   mad_recv_wc);
+			atomic_dec(&mad_agent_priv->refcount);
+
+			mad_send_wc.status = IB_WC_SUCCESS;
+			mad_send_wc.vendor_err = 0;
+			mad_send_wc.send_buf = &mad_send_wr->send_buf;
+			ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
 		}
-		ib_mark_mad_done(mad_send_wr);
-		spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
-
-		/* Defined behavior is to complete response before request */
-		mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
-		mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
-						   mad_recv_wc);
-		atomic_dec(&mad_agent_priv->refcount);
-
-		mad_send_wc.status = IB_WC_SUCCESS;
-		mad_send_wc.vendor_err = 0;
-		mad_send_wc.send_buf = &mad_send_wr->send_buf;
-		ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
 	} else {
 		mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
 						   mad_recv_wc);
@@ -1911,8 +1984,8 @@
 
 	response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
 	if (!response) {
-		printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory "
-		       "for response buffer\n");
+		dev_err(&port_priv->device->dev,
+			"ib_mad_recv_done_handler no memory for response buffer\n");
 		goto out;
 	}
 
@@ -2083,7 +2156,7 @@
 
 	mad_agent_priv = mad_send_wr->mad_agent_priv;
 	spin_lock_irqsave(&mad_agent_priv->lock, flags);
-	if (mad_agent_priv->agent.rmpp_version) {
+	if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
 		ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
 		if (ret == IB_RMPP_RESULT_CONSUMED)
 			goto done;
@@ -2176,7 +2249,8 @@
 		ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr,
 				   &bad_send_wr);
 		if (ret) {
-			printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret);
+			dev_err(&port_priv->device->dev,
+				"ib_post_send failed: %d\n", ret);
 			mad_send_wr = queued_send_wr;
 			wc->status = IB_WC_LOC_QP_OP_ERR;
 			goto retry;
@@ -2248,8 +2322,9 @@
 					   IB_QP_STATE | IB_QP_CUR_STATE);
 			kfree(attr);
 			if (ret)
-				printk(KERN_ERR PFX "mad_error_handler - "
-				       "ib_modify_qp to RTS : %d\n", ret);
+				dev_err(&port_priv->device->dev,
+					"mad_error_handler - ib_modify_qp to RTS : %d\n",
+					ret);
 			else
 				mark_sends_for_retry(qp_info);
 		}
@@ -2408,7 +2483,8 @@
 		if (local->mad_priv) {
 			recv_mad_agent = local->recv_mad_agent;
 			if (!recv_mad_agent) {
-				printk(KERN_ERR PFX "No receive MAD agent for local completion\n");
+				dev_err(&mad_agent_priv->agent.device->dev,
+					"No receive MAD agent for local completion\n");
 				free_mad = 1;
 				goto local_send_completion;
 			}
@@ -2476,7 +2552,7 @@
 
 	mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
 
-	if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {
+	if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) {
 		ret = ib_retry_rmpp(mad_send_wr);
 		switch (ret) {
 		case IB_RMPP_RESULT_UNHANDLED:
@@ -2589,7 +2665,8 @@
 		} else {
 			mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
 			if (!mad_priv) {
-				printk(KERN_ERR PFX "No memory for receive buffer\n");
+				dev_err(&qp_info->port_priv->device->dev,
+					"No memory for receive buffer\n");
 				ret = -ENOMEM;
 				break;
 			}
@@ -2625,7 +2702,8 @@
 					      sizeof mad_priv->header,
 					    DMA_FROM_DEVICE);
 			kmem_cache_free(ib_mad_cache, mad_priv);
-			printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
+			dev_err(&qp_info->port_priv->device->dev,
+				"ib_post_recv failed: %d\n", ret);
 			break;
 		}
 	} while (post);
@@ -2681,7 +2759,8 @@
 
 	attr = kmalloc(sizeof *attr, GFP_KERNEL);
 	if (!attr) {
-		printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n");
+		dev_err(&port_priv->device->dev,
+			"Couldn't kmalloc ib_qp_attr\n");
 		return -ENOMEM;
 	}
 
@@ -2705,16 +2784,18 @@
 		ret = ib_modify_qp(qp, attr, IB_QP_STATE |
 					     IB_QP_PKEY_INDEX | IB_QP_QKEY);
 		if (ret) {
-			printk(KERN_ERR PFX "Couldn't change QP%d state to "
-			       "INIT: %d\n", i, ret);
+			dev_err(&port_priv->device->dev,
+				"Couldn't change QP%d state to INIT: %d\n",
+				i, ret);
 			goto out;
 		}
 
 		attr->qp_state = IB_QPS_RTR;
 		ret = ib_modify_qp(qp, attr, IB_QP_STATE);
 		if (ret) {
-			printk(KERN_ERR PFX "Couldn't change QP%d state to "
-			       "RTR: %d\n", i, ret);
+			dev_err(&port_priv->device->dev,
+				"Couldn't change QP%d state to RTR: %d\n",
+				i, ret);
 			goto out;
 		}
 
@@ -2722,16 +2803,18 @@
 		attr->sq_psn = IB_MAD_SEND_Q_PSN;
 		ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN);
 		if (ret) {
-			printk(KERN_ERR PFX "Couldn't change QP%d state to "
-			       "RTS: %d\n", i, ret);
+			dev_err(&port_priv->device->dev,
+				"Couldn't change QP%d state to RTS: %d\n",
+				i, ret);
 			goto out;
 		}
 	}
 
 	ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
 	if (ret) {
-		printk(KERN_ERR PFX "Failed to request completion "
-		       "notification: %d\n", ret);
+		dev_err(&port_priv->device->dev,
+			"Failed to request completion notification: %d\n",
+			ret);
 		goto out;
 	}
 
@@ -2741,7 +2824,8 @@
 
 		ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
 		if (ret) {
-			printk(KERN_ERR PFX "Couldn't post receive WRs\n");
+			dev_err(&port_priv->device->dev,
+				"Couldn't post receive WRs\n");
 			goto out;
 		}
 	}
@@ -2755,7 +2839,8 @@
 	struct ib_mad_qp_info	*qp_info = qp_context;
 
 	/* It's worse than that! He's dead, Jim! */
-	printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n",
+	dev_err(&qp_info->port_priv->device->dev,
+		"Fatal error (%d) on MAD QP (%d)\n",
 		event->event, qp_info->qp->qp_num);
 }
 
@@ -2801,8 +2886,9 @@
 	qp_init_attr.event_handler = qp_event_handler;
 	qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr);
 	if (IS_ERR(qp_info->qp)) {
-		printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n",
-		       get_spl_qp_index(qp_type));
+		dev_err(&qp_info->port_priv->device->dev,
+			"Couldn't create ib_mad QP%d\n",
+			get_spl_qp_index(qp_type));
 		ret = PTR_ERR(qp_info->qp);
 		goto error;
 	}
@@ -2840,7 +2926,7 @@
 	/* Create new device info */
 	port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
 	if (!port_priv) {
-		printk(KERN_ERR PFX "No memory for ib_mad_port_private\n");
+		dev_err(&device->dev, "No memory for ib_mad_port_private\n");
 		return -ENOMEM;
 	}
 
@@ -2860,21 +2946,21 @@
 				     ib_mad_thread_completion_handler,
 				     NULL, port_priv, cq_size, 0);
 	if (IS_ERR(port_priv->cq)) {
-		printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n");
+		dev_err(&device->dev, "Couldn't create ib_mad CQ\n");
 		ret = PTR_ERR(port_priv->cq);
 		goto error3;
 	}
 
 	port_priv->pd = ib_alloc_pd(device);
 	if (IS_ERR(port_priv->pd)) {
-		printk(KERN_ERR PFX "Couldn't create ib_mad PD\n");
+		dev_err(&device->dev, "Couldn't create ib_mad PD\n");
 		ret = PTR_ERR(port_priv->pd);
 		goto error4;
 	}
 
 	port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE);
 	if (IS_ERR(port_priv->mr)) {
-		printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n");
+		dev_err(&device->dev, "Couldn't get ib_mad DMA MR\n");
 		ret = PTR_ERR(port_priv->mr);
 		goto error5;
 	}
@@ -2902,7 +2988,7 @@
 
 	ret = ib_mad_port_start(port_priv);
 	if (ret) {
-		printk(KERN_ERR PFX "Couldn't start port\n");
+		dev_err(&device->dev, "Couldn't start port\n");
 		goto error9;
 	}
 
@@ -2946,7 +3032,7 @@
 	port_priv = __ib_get_mad_port(device, port_num);
 	if (port_priv == NULL) {
 		spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
-		printk(KERN_ERR PFX "Port %d not found\n", port_num);
+		dev_err(&device->dev, "Port %d not found\n", port_num);
 		return -ENODEV;
 	}
 	list_del_init(&port_priv->port_list);
@@ -2984,14 +3070,12 @@
 
 	for (i = start; i <= end; i++) {
 		if (ib_mad_port_open(device, i)) {
-			printk(KERN_ERR PFX "Couldn't open %s port %d\n",
-			       device->name, i);
+			dev_err(&device->dev, "Couldn't open port %d\n", i);
 			goto error;
 		}
 		if (ib_agent_port_open(device, i)) {
-			printk(KERN_ERR PFX "Couldn't open %s port %d "
-			       "for agents\n",
-			       device->name, i);
+			dev_err(&device->dev,
+				"Couldn't open port %d for agents\n", i);
 			goto error_agent;
 		}
 	}
@@ -2999,20 +3083,17 @@
 
 error_agent:
 	if (ib_mad_port_close(device, i))
-		printk(KERN_ERR PFX "Couldn't close %s port %d\n",
-		       device->name, i);
+		dev_err(&device->dev, "Couldn't close port %d\n", i);
 
 error:
 	i--;
 
 	while (i >= start) {
 		if (ib_agent_port_close(device, i))
-			printk(KERN_ERR PFX "Couldn't close %s port %d "
-			       "for agents\n",
-			       device->name, i);
+			dev_err(&device->dev,
+				"Couldn't close port %d for agents\n", i);
 		if (ib_mad_port_close(device, i))
-			printk(KERN_ERR PFX "Couldn't close %s port %d\n",
-			       device->name, i);
+			dev_err(&device->dev, "Couldn't close port %d\n", i);
 		i--;
 	}
 }
@@ -3033,12 +3114,12 @@
 	}
 	for (i = 0; i < num_ports; i++, cur_port++) {
 		if (ib_agent_port_close(device, cur_port))
-			printk(KERN_ERR PFX "Couldn't close %s port %d "
-			       "for agents\n",
-			       device->name, cur_port);
+			dev_err(&device->dev,
+				"Couldn't close port %d for agents\n",
+				cur_port);
 		if (ib_mad_port_close(device, cur_port))
-			printk(KERN_ERR PFX "Couldn't close %s port %d\n",
-			       device->name, cur_port);
+			dev_err(&device->dev, "Couldn't close port %d\n",
+				cur_port);
 	}
 }
 
@@ -3064,7 +3145,7 @@
 					 SLAB_HWCACHE_ALIGN,
 					 NULL);
 	if (!ib_mad_cache) {
-		printk(KERN_ERR PFX "Couldn't create ib_mad cache\n");
+		pr_err("Couldn't create ib_mad cache\n");
 		ret = -ENOMEM;
 		goto error1;
 	}
@@ -3072,7 +3153,7 @@
 	INIT_LIST_HEAD(&ib_mad_port_list);
 
 	if (ib_register_client(&mad_client)) {
-		printk(KERN_ERR PFX "Couldn't register ib_mad client\n");
+		pr_err("Couldn't register ib_mad client\n");
 		ret = -EINVAL;
 		goto error2;
 	}
diff --git a/drivers/infiniband/core/mad_priv.h b/drivers/infiniband/core/mad_priv.h
index 9430ab4..d1a0b0e 100644
--- a/drivers/infiniband/core/mad_priv.h
+++ b/drivers/infiniband/core/mad_priv.h
@@ -42,9 +42,6 @@
 #include <rdma/ib_mad.h>
 #include <rdma/ib_smi.h>
 
-
-#define PFX "ib_mad: "
-
 #define IB_MAD_QPS_CORE		2 /* Always QP0 and QP1 as a minimum */
 
 /* QP and CQ parameters */
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 233eaf5..c38f030 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -1184,7 +1184,7 @@
 		sa_dev->port[i].agent =
 			ib_register_mad_agent(device, i + s, IB_QPT_GSI,
 					      NULL, 0, send_handler,
-					      recv_handler, sa_dev);
+					      recv_handler, sa_dev, 0);
 		if (IS_ERR(sa_dev->port[i].agent))
 			goto err;
 
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 1acb991..928cdd2 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -33,6 +33,8 @@
  * SOFTWARE.
  */
 
+#define pr_fmt(fmt) "user_mad: " fmt
+
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
@@ -504,13 +506,15 @@
 
 	rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
 	hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class);
-	if (!ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)) {
-		copy_offset = IB_MGMT_MAD_HDR;
-		rmpp_active = 0;
-	} else {
+
+	if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
+	    && ib_mad_kernel_rmpp_agent(agent)) {
 		copy_offset = IB_MGMT_RMPP_HDR;
 		rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
-			      IB_MGMT_RMPP_FLAG_ACTIVE;
+						IB_MGMT_RMPP_FLAG_ACTIVE;
+	} else {
+		copy_offset = IB_MGMT_MAD_HDR;
+		rmpp_active = 0;
 	}
 
 	data_len = count - hdr_size(file) - hdr_len;
@@ -556,14 +560,22 @@
 		rmpp_mad->mad_hdr.tid = *tid;
 	}
 
-	spin_lock_irq(&file->send_lock);
-	ret = is_duplicate(file, packet);
-	if (!ret)
+	if (!ib_mad_kernel_rmpp_agent(agent)
+	   && ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
+	   && (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) {
+		spin_lock_irq(&file->send_lock);
 		list_add_tail(&packet->list, &file->send_list);
-	spin_unlock_irq(&file->send_lock);
-	if (ret) {
-		ret = -EINVAL;
-		goto err_msg;
+		spin_unlock_irq(&file->send_lock);
+	} else {
+		spin_lock_irq(&file->send_lock);
+		ret = is_duplicate(file, packet);
+		if (!ret)
+			list_add_tail(&packet->list, &file->send_list);
+		spin_unlock_irq(&file->send_lock);
+		if (ret) {
+			ret = -EINVAL;
+			goto err_msg;
+		}
 	}
 
 	ret = ib_post_send_mad(packet->msg, NULL);
@@ -614,6 +626,8 @@
 	mutex_lock(&file->mutex);
 
 	if (!file->port->ib_dev) {
+		dev_notice(file->port->dev,
+			   "ib_umad_reg_agent: invalid device\n");
 		ret = -EPIPE;
 		goto out;
 	}
@@ -624,6 +638,9 @@
 	}
 
 	if (ureq.qpn != 0 && ureq.qpn != 1) {
+		dev_notice(file->port->dev,
+			   "ib_umad_reg_agent: invalid QPN %d specified\n",
+			   ureq.qpn);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -632,11 +649,15 @@
 		if (!__get_agent(file, agent_id))
 			goto found;
 
+	dev_notice(file->port->dev,
+		   "ib_umad_reg_agent: Max Agents (%u) reached\n",
+		   IB_UMAD_MAX_AGENTS);
 	ret = -ENOMEM;
 	goto out;
 
 found:
 	if (ureq.mgmt_class) {
+		memset(&req, 0, sizeof(req));
 		req.mgmt_class         = ureq.mgmt_class;
 		req.mgmt_class_version = ureq.mgmt_class_version;
 		memcpy(req.oui, ureq.oui, sizeof req.oui);
@@ -657,7 +678,7 @@
 				      ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
 				      ureq.mgmt_class ? &req : NULL,
 				      ureq.rmpp_version,
-				      send_handler, recv_handler, file);
+				      send_handler, recv_handler, file, 0);
 	if (IS_ERR(agent)) {
 		ret = PTR_ERR(agent);
 		agent = NULL;
@@ -673,10 +694,11 @@
 	if (!file->already_used) {
 		file->already_used = 1;
 		if (!file->use_pkey_index) {
-			printk(KERN_WARNING "user_mad: process %s did not enable "
-			       "P_Key index support.\n", current->comm);
-			printk(KERN_WARNING "user_mad:   Documentation/infiniband/user_mad.txt "
-			       "has info on the new ABI.\n");
+			dev_warn(file->port->dev,
+				"process %s did not enable P_Key index support.\n",
+				current->comm);
+			dev_warn(file->port->dev,
+				"   Documentation/infiniband/user_mad.txt has info on the new ABI.\n");
 		}
 	}
 
@@ -694,6 +716,119 @@
 	return ret;
 }
 
+static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg)
+{
+	struct ib_user_mad_reg_req2 ureq;
+	struct ib_mad_reg_req req;
+	struct ib_mad_agent *agent = NULL;
+	int agent_id;
+	int ret;
+
+	mutex_lock(&file->port->file_mutex);
+	mutex_lock(&file->mutex);
+
+	if (!file->port->ib_dev) {
+		dev_notice(file->port->dev,
+			   "ib_umad_reg_agent2: invalid device\n");
+		ret = -EPIPE;
+		goto out;
+	}
+
+	if (copy_from_user(&ureq, arg, sizeof(ureq))) {
+		ret = -EFAULT;
+		goto out;
+	}
+
+	if (ureq.qpn != 0 && ureq.qpn != 1) {
+		dev_notice(file->port->dev,
+			   "ib_umad_reg_agent2: invalid QPN %d specified\n",
+			   ureq.qpn);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) {
+		dev_notice(file->port->dev,
+			   "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n",
+			   ureq.flags, IB_USER_MAD_REG_FLAGS_CAP);
+		ret = -EINVAL;
+
+		if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP,
+				(u32 __user *) (arg + offsetof(struct
+				ib_user_mad_reg_req2, flags))))
+			ret = -EFAULT;
+
+		goto out;
+	}
+
+	for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
+		if (!__get_agent(file, agent_id))
+			goto found;
+
+	dev_notice(file->port->dev,
+		   "ib_umad_reg_agent2: Max Agents (%u) reached\n",
+		   IB_UMAD_MAX_AGENTS);
+	ret = -ENOMEM;
+	goto out;
+
+found:
+	if (ureq.mgmt_class) {
+		memset(&req, 0, sizeof(req));
+		req.mgmt_class         = ureq.mgmt_class;
+		req.mgmt_class_version = ureq.mgmt_class_version;
+		if (ureq.oui & 0xff000000) {
+			dev_notice(file->port->dev,
+				   "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n",
+				   ureq.oui);
+			ret = -EINVAL;
+			goto out;
+		}
+		req.oui[2] =  ureq.oui & 0x0000ff;
+		req.oui[1] = (ureq.oui & 0x00ff00) >> 8;
+		req.oui[0] = (ureq.oui & 0xff0000) >> 16;
+		memcpy(req.method_mask, ureq.method_mask,
+			sizeof(req.method_mask));
+	}
+
+	agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
+				      ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
+				      ureq.mgmt_class ? &req : NULL,
+				      ureq.rmpp_version,
+				      send_handler, recv_handler, file,
+				      ureq.flags);
+	if (IS_ERR(agent)) {
+		ret = PTR_ERR(agent);
+		agent = NULL;
+		goto out;
+	}
+
+	if (put_user(agent_id,
+		     (u32 __user *)(arg +
+				offsetof(struct ib_user_mad_reg_req2, id)))) {
+		ret = -EFAULT;
+		goto out;
+	}
+
+	if (!file->already_used) {
+		file->already_used = 1;
+		file->use_pkey_index = 1;
+	}
+
+	file->agent[agent_id] = agent;
+	ret = 0;
+
+out:
+	mutex_unlock(&file->mutex);
+
+	if (ret && agent)
+		ib_unregister_mad_agent(agent);
+
+	mutex_unlock(&file->port->file_mutex);
+
+	return ret;
+}
+
+
 static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg)
 {
 	struct ib_mad_agent *agent = NULL;
@@ -749,6 +884,8 @@
 		return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg);
 	case IB_USER_MAD_ENABLE_PKEY:
 		return ib_umad_enable_pkey(filp->private_data);
+	case IB_USER_MAD_REGISTER_AGENT2:
+		return ib_umad_reg_agent2(filp->private_data, (void __user *) arg);
 	default:
 		return -ENOIOCTLCMD;
 	}
@@ -765,6 +902,8 @@
 		return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg));
 	case IB_USER_MAD_ENABLE_PKEY:
 		return ib_umad_enable_pkey(filp->private_data);
+	case IB_USER_MAD_REGISTER_AGENT2:
+		return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg));
 	default:
 		return -ENOIOCTLCMD;
 	}
@@ -983,7 +1122,7 @@
 
 static dev_t overflow_maj;
 static DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS);
-static int find_overflow_devnum(void)
+static int find_overflow_devnum(struct ib_device *device)
 {
 	int ret;
 
@@ -991,7 +1130,8 @@
 		ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2,
 					  "infiniband_mad");
 		if (ret) {
-			printk(KERN_ERR "user_mad: couldn't register dynamic device number\n");
+			dev_err(&device->dev,
+				"couldn't register dynamic device number\n");
 			return ret;
 		}
 	}
@@ -1014,7 +1154,7 @@
 	devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
 	if (devnum >= IB_UMAD_MAX_PORTS) {
 		spin_unlock(&port_lock);
-		devnum = find_overflow_devnum();
+		devnum = find_overflow_devnum(device);
 		if (devnum < 0)
 			return -1;
 
@@ -1200,14 +1340,14 @@
 	ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2,
 				     "infiniband_mad");
 	if (ret) {
-		printk(KERN_ERR "user_mad: couldn't register device number\n");
+		pr_err("couldn't register device number\n");
 		goto out;
 	}
 
 	umad_class = class_create(THIS_MODULE, "infiniband_mad");
 	if (IS_ERR(umad_class)) {
 		ret = PTR_ERR(umad_class);
-		printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n");
+		pr_err("couldn't create class infiniband_mad\n");
 		goto out_chrdev;
 	}
 
@@ -1215,13 +1355,13 @@
 
 	ret = class_create_file(umad_class, &class_attr_abi_version.attr);
 	if (ret) {
-		printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n");
+		pr_err("couldn't create abi_version attribute\n");
 		goto out_class;
 	}
 
 	ret = ib_register_client(&umad_client);
 	if (ret) {
-		printk(KERN_ERR "user_mad: couldn't register ib_umad client\n");
+		pr_err("couldn't register ib_umad client\n");
 		goto out_class;
 	}
 
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
index a283274..643c08a 100644
--- a/drivers/infiniband/core/uverbs.h
+++ b/drivers/infiniband/core/uverbs.h
@@ -221,6 +221,7 @@
 IB_UVERBS_DECLARE_CMD(alloc_pd);
 IB_UVERBS_DECLARE_CMD(dealloc_pd);
 IB_UVERBS_DECLARE_CMD(reg_mr);
+IB_UVERBS_DECLARE_CMD(rereg_mr);
 IB_UVERBS_DECLARE_CMD(dereg_mr);
 IB_UVERBS_DECLARE_CMD(alloc_mw);
 IB_UVERBS_DECLARE_CMD(dealloc_mw);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index ea6203e..0600c50 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1002,6 +1002,99 @@
 	return ret;
 }
 
+ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
+			   const char __user *buf, int in_len,
+			   int out_len)
+{
+	struct ib_uverbs_rereg_mr      cmd;
+	struct ib_uverbs_rereg_mr_resp resp;
+	struct ib_udata              udata;
+	struct ib_pd                *pd = NULL;
+	struct ib_mr                *mr;
+	struct ib_pd		    *old_pd;
+	int                          ret;
+	struct ib_uobject	    *uobj;
+
+	if (out_len < sizeof(resp))
+		return -ENOSPC;
+
+	if (copy_from_user(&cmd, buf, sizeof(cmd)))
+		return -EFAULT;
+
+	INIT_UDATA(&udata, buf + sizeof(cmd),
+		   (unsigned long) cmd.response + sizeof(resp),
+		   in_len - sizeof(cmd), out_len - sizeof(resp));
+
+	if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
+		return -EINVAL;
+
+	if ((cmd.flags & IB_MR_REREG_TRANS) &&
+	    (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
+	     (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
+			return -EINVAL;
+
+	uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
+			      file->ucontext);
+
+	if (!uobj)
+		return -EINVAL;
+
+	mr = uobj->object;
+
+	if (cmd.flags & IB_MR_REREG_ACCESS) {
+		ret = ib_check_mr_access(cmd.access_flags);
+		if (ret)
+			goto put_uobjs;
+	}
+
+	if (cmd.flags & IB_MR_REREG_PD) {
+		pd = idr_read_pd(cmd.pd_handle, file->ucontext);
+		if (!pd) {
+			ret = -EINVAL;
+			goto put_uobjs;
+		}
+	}
+
+	if (atomic_read(&mr->usecnt)) {
+		ret = -EBUSY;
+		goto put_uobj_pd;
+	}
+
+	old_pd = mr->pd;
+	ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
+					cmd.length, cmd.hca_va,
+					cmd.access_flags, pd, &udata);
+	if (!ret) {
+		if (cmd.flags & IB_MR_REREG_PD) {
+			atomic_inc(&pd->usecnt);
+			mr->pd = pd;
+			atomic_dec(&old_pd->usecnt);
+		}
+	} else {
+		goto put_uobj_pd;
+	}
+
+	memset(&resp, 0, sizeof(resp));
+	resp.lkey      = mr->lkey;
+	resp.rkey      = mr->rkey;
+
+	if (copy_to_user((void __user *)(unsigned long)cmd.response,
+			 &resp, sizeof(resp)))
+		ret = -EFAULT;
+	else
+		ret = in_len;
+
+put_uobj_pd:
+	if (cmd.flags & IB_MR_REREG_PD)
+		put_pd_read(pd);
+
+put_uobjs:
+
+	put_uobj_write(mr->uobject);
+
+	return ret;
+}
+
 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 			   const char __user *buf, int in_len,
 			   int out_len)
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 08219fb..c73b22a 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -87,6 +87,7 @@
 	[IB_USER_VERBS_CMD_ALLOC_PD]		= ib_uverbs_alloc_pd,
 	[IB_USER_VERBS_CMD_DEALLOC_PD]		= ib_uverbs_dealloc_pd,
 	[IB_USER_VERBS_CMD_REG_MR]		= ib_uverbs_reg_mr,
+	[IB_USER_VERBS_CMD_REREG_MR]		= ib_uverbs_rereg_mr,
 	[IB_USER_VERBS_CMD_DEREG_MR]		= ib_uverbs_dereg_mr,
 	[IB_USER_VERBS_CMD_ALLOC_MW]		= ib_uverbs_alloc_mw,
 	[IB_USER_VERBS_CMD_DEALLOC_MW]		= ib_uverbs_dealloc_mw,
diff --git a/drivers/infiniband/hw/amso1100/c2_cq.c b/drivers/infiniband/hw/amso1100/c2_cq.c
index 49e0e85..1b63185 100644
--- a/drivers/infiniband/hw/amso1100/c2_cq.c
+++ b/drivers/infiniband/hw/amso1100/c2_cq.c
@@ -260,11 +260,14 @@
 			  mq->msg_pool.host, dma_unmap_addr(mq, mapping));
 }
 
-static int c2_alloc_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq, int q_size,
-			   int msg_size)
+static int c2_alloc_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq,
+			   size_t q_size, size_t msg_size)
 {
 	u8 *pool_start;
 
+	if (q_size > SIZE_MAX / msg_size)
+		return -EINVAL;
+
 	pool_start = dma_alloc_coherent(&c2dev->pcidev->dev, q_size * msg_size,
 					&mq->host_dma, GFP_KERNEL);
 	if (!pool_start)
diff --git a/drivers/infiniband/hw/cxgb4/ev.c b/drivers/infiniband/hw/cxgb4/ev.c
index fbe6051..c9df054 100644
--- a/drivers/infiniband/hw/cxgb4/ev.c
+++ b/drivers/infiniband/hw/cxgb4/ev.c
@@ -227,6 +227,7 @@
 
 	chp = get_chp(dev, qid);
 	if (chp) {
+		t4_clear_cq_armed(&chp->cq);
 		spin_lock_irqsave(&chp->comp_handler_lock, flag);
 		(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
 		spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index c158fcc..41cd688 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -1105,7 +1105,7 @@
 		       struct c4iw_cq *schp)
 {
 	int count;
-	int flushed;
+	int rq_flushed, sq_flushed;
 	unsigned long flag;
 
 	PDBG("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
@@ -1123,27 +1123,40 @@
 
 	c4iw_flush_hw_cq(rchp);
 	c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count);
-	flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
+	rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count);
 	spin_unlock(&qhp->lock);
 	spin_unlock_irqrestore(&rchp->lock, flag);
-	if (flushed) {
-		spin_lock_irqsave(&rchp->comp_handler_lock, flag);
-		(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
-		spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
-	}
 
 	/* locking hierarchy: cq lock first, then qp lock. */
 	spin_lock_irqsave(&schp->lock, flag);
 	spin_lock(&qhp->lock);
 	if (schp != rchp)
 		c4iw_flush_hw_cq(schp);
-	flushed = c4iw_flush_sq(qhp);
+	sq_flushed = c4iw_flush_sq(qhp);
 	spin_unlock(&qhp->lock);
 	spin_unlock_irqrestore(&schp->lock, flag);
-	if (flushed) {
-		spin_lock_irqsave(&schp->comp_handler_lock, flag);
-		(*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
-		spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
+
+	if (schp == rchp) {
+		if (t4_clear_cq_armed(&rchp->cq) &&
+		    (rq_flushed || sq_flushed)) {
+			spin_lock_irqsave(&rchp->comp_handler_lock, flag);
+			(*rchp->ibcq.comp_handler)(&rchp->ibcq,
+						   rchp->ibcq.cq_context);
+			spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
+		}
+	} else {
+		if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) {
+			spin_lock_irqsave(&rchp->comp_handler_lock, flag);
+			(*rchp->ibcq.comp_handler)(&rchp->ibcq,
+						   rchp->ibcq.cq_context);
+			spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
+		}
+		if (t4_clear_cq_armed(&schp->cq) && sq_flushed) {
+			spin_lock_irqsave(&schp->comp_handler_lock, flag);
+			(*schp->ibcq.comp_handler)(&schp->ibcq,
+						   schp->ibcq.cq_context);
+			spin_unlock_irqrestore(&schp->comp_handler_lock, flag);
+		}
 	}
 }
 
diff --git a/drivers/infiniband/hw/cxgb4/t4.h b/drivers/infiniband/hw/cxgb4/t4.h
index df5edfa..c04e513 100644
--- a/drivers/infiniband/hw/cxgb4/t4.h
+++ b/drivers/infiniband/hw/cxgb4/t4.h
@@ -524,6 +524,10 @@
 	return !wq->rq.queue[wq->rq.size].status.db_off;
 }
 
+enum t4_cq_flags {
+	CQ_ARMED	= 1,
+};
+
 struct t4_cq {
 	struct t4_cqe *queue;
 	dma_addr_t dma_addr;
@@ -544,12 +548,19 @@
 	u16 cidx_inc;
 	u8 gen;
 	u8 error;
+	unsigned long flags;
 };
 
+static inline int t4_clear_cq_armed(struct t4_cq *cq)
+{
+	return test_and_clear_bit(CQ_ARMED, &cq->flags);
+}
+
 static inline int t4_arm_cq(struct t4_cq *cq, int se)
 {
 	u32 val;
 
+	set_bit(CQ_ARMED, &cq->flags);
 	while (cq->cidx_inc > CIDXINC_MASK) {
 		val = SEINTARM(0) | CIDXINC(CIDXINC_MASK) | TIMERREG(7) |
 		      INGRESSQID(cq->cqid);
diff --git a/drivers/infiniband/hw/ipath/ipath_mad.c b/drivers/infiniband/hw/ipath/ipath_mad.c
index 43f2d04..e890e5b 100644
--- a/drivers/infiniband/hw/ipath/ipath_mad.c
+++ b/drivers/infiniband/hw/ipath/ipath_mad.c
@@ -726,7 +726,7 @@
  * @dd: the infinipath device
  * @pkeys: the PKEY table
  */
-static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
+static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys, u8 port)
 {
 	struct ipath_portdata *pd;
 	int i;
@@ -759,6 +759,7 @@
 	}
 	if (changed) {
 		u64 pkey;
+		struct ib_event event;
 
 		pkey = (u64) dd->ipath_pkeys[0] |
 			((u64) dd->ipath_pkeys[1] << 16) |
@@ -768,12 +769,17 @@
 			   (unsigned long long) pkey);
 		ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
 				 pkey);
+
+		event.event = IB_EVENT_PKEY_CHANGE;
+		event.device = &dd->verbs_dev->ibdev;
+		event.element.port_num = port;
+		ib_dispatch_event(&event);
 	}
 	return 0;
 }
 
 static int recv_subn_set_pkeytable(struct ib_smp *smp,
-				   struct ib_device *ibdev)
+				   struct ib_device *ibdev, u8 port)
 {
 	u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
 	__be16 *p = (__be16 *) smp->data;
@@ -784,7 +790,7 @@
 	for (i = 0; i < n; i++)
 		q[i] = be16_to_cpu(p[i]);
 
-	if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
+	if (startpx != 0 || set_pkeys(dev->dd, q, port) != 0)
 		smp->status |= IB_SMP_INVALID_FIELD;
 
 	return recv_subn_get_pkeytable(smp, ibdev);
@@ -1342,7 +1348,7 @@
 			ret = recv_subn_set_portinfo(smp, ibdev, port_num);
 			goto bail;
 		case IB_SMP_ATTR_PKEY_TABLE:
-			ret = recv_subn_set_pkeytable(smp, ibdev);
+			ret = recv_subn_set_pkeytable(smp, ibdev, port_num);
 			goto bail;
 		case IB_SMP_ATTR_SM_INFO:
 			if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 287ad05..82a7dd8 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -891,7 +891,7 @@
 				agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
 							      q ? IB_QPT_GSI : IB_QPT_SMI,
 							      NULL, 0, send_handler,
-							      NULL, NULL);
+							      NULL, NULL, 0);
 				if (IS_ERR(agent)) {
 					ret = PTR_ERR(agent);
 					goto err;
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 0f7027e..e1e558a 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -910,8 +910,7 @@
 	const struct default_rules *pdefault_rules = default_table;
 	u8 link_layer = rdma_port_get_link_layer(qp->device, flow_attr->port);
 
-	for (i = 0; i < sizeof(default_table)/sizeof(default_table[0]); i++,
-	     pdefault_rules++) {
+	for (i = 0; i < ARRAY_SIZE(default_table); i++, pdefault_rules++) {
 		__u32 field_types[IB_FLOW_SPEC_SUPPORT_LAYERS];
 		memset(&field_types, 0, sizeof(field_types));
 
@@ -965,8 +964,7 @@
 	int size = 0;
 	int i;
 
-	for (i = 0; i < sizeof(pdefault_rules->rules_create_list)/
-			sizeof(pdefault_rules->rules_create_list[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(pdefault_rules->rules_create_list); i++) {
 		int ret;
 		union ib_flow_spec ib_spec;
 		switch (pdefault_rules->rules_create_list[i]) {
@@ -2007,6 +2005,7 @@
 		(1ull << IB_USER_VERBS_CMD_ALLOC_PD)		|
 		(1ull << IB_USER_VERBS_CMD_DEALLOC_PD)		|
 		(1ull << IB_USER_VERBS_CMD_REG_MR)		|
+		(1ull << IB_USER_VERBS_CMD_REREG_MR)		|
 		(1ull << IB_USER_VERBS_CMD_DEREG_MR)		|
 		(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)	|
 		(1ull << IB_USER_VERBS_CMD_CREATE_CQ)		|
@@ -2059,6 +2058,7 @@
 	ibdev->ib_dev.req_notify_cq	= mlx4_ib_arm_cq;
 	ibdev->ib_dev.get_dma_mr	= mlx4_ib_get_dma_mr;
 	ibdev->ib_dev.reg_user_mr	= mlx4_ib_reg_user_mr;
+	ibdev->ib_dev.rereg_user_mr	= mlx4_ib_rereg_user_mr;
 	ibdev->ib_dev.dereg_mr		= mlx4_ib_dereg_mr;
 	ibdev->ib_dev.alloc_fast_reg_mr = mlx4_ib_alloc_fast_reg_mr;
 	ibdev->ib_dev.alloc_fast_reg_page_list = mlx4_ib_alloc_fast_reg_page_list;
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 369da3c..e8cad39 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -788,5 +788,9 @@
 void mlx4_ib_steer_qp_free(struct mlx4_ib_dev *dev, u32 qpn, int count);
 int mlx4_ib_steer_qp_reg(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
 			 int is_attach);
+int mlx4_ib_rereg_user_mr(struct ib_mr *mr, int flags,
+			  u64 start, u64 length, u64 virt_addr,
+			  int mr_access_flags, struct ib_pd *pd,
+			  struct ib_udata *udata);
 
 #endif /* MLX4_IB_H */
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index cb2a872..9b0e80e 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -144,8 +144,10 @@
 	if (!mr)
 		return ERR_PTR(-ENOMEM);
 
+	/* Force registering the memory as writable. */
+	/* Used for memory re-registeration. HCA protects the access */
 	mr->umem = ib_umem_get(pd->uobject->context, start, length,
-			       access_flags, 0);
+			       access_flags | IB_ACCESS_LOCAL_WRITE, 0);
 	if (IS_ERR(mr->umem)) {
 		err = PTR_ERR(mr->umem);
 		goto err_free;
@@ -183,6 +185,90 @@
 	return ERR_PTR(err);
 }
 
+int mlx4_ib_rereg_user_mr(struct ib_mr *mr, int flags,
+			  u64 start, u64 length, u64 virt_addr,
+			  int mr_access_flags, struct ib_pd *pd,
+			  struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(mr->device);
+	struct mlx4_ib_mr *mmr = to_mmr(mr);
+	struct mlx4_mpt_entry *mpt_entry;
+	struct mlx4_mpt_entry **pmpt_entry = &mpt_entry;
+	int err;
+
+	/* Since we synchronize this call and mlx4_ib_dereg_mr via uverbs,
+	 * we assume that the calls can't run concurrently. Otherwise, a
+	 * race exists.
+	 */
+	err =  mlx4_mr_hw_get_mpt(dev->dev, &mmr->mmr, &pmpt_entry);
+
+	if (err)
+		return err;
+
+	if (flags & IB_MR_REREG_PD) {
+		err = mlx4_mr_hw_change_pd(dev->dev, *pmpt_entry,
+					   to_mpd(pd)->pdn);
+
+		if (err)
+			goto release_mpt_entry;
+	}
+
+	if (flags & IB_MR_REREG_ACCESS) {
+		err = mlx4_mr_hw_change_access(dev->dev, *pmpt_entry,
+					       convert_access(mr_access_flags));
+
+		if (err)
+			goto release_mpt_entry;
+	}
+
+	if (flags & IB_MR_REREG_TRANS) {
+		int shift;
+		int err;
+		int n;
+
+		mlx4_mr_rereg_mem_cleanup(dev->dev, &mmr->mmr);
+		ib_umem_release(mmr->umem);
+		mmr->umem = ib_umem_get(mr->uobject->context, start, length,
+					mr_access_flags |
+					IB_ACCESS_LOCAL_WRITE,
+					0);
+		if (IS_ERR(mmr->umem)) {
+			err = PTR_ERR(mmr->umem);
+			mmr->umem = NULL;
+			goto release_mpt_entry;
+		}
+		n = ib_umem_page_count(mmr->umem);
+		shift = ilog2(mmr->umem->page_size);
+
+		mmr->mmr.iova       = virt_addr;
+		mmr->mmr.size       = length;
+		err = mlx4_mr_rereg_mem_write(dev->dev, &mmr->mmr,
+					      virt_addr, length, n, shift,
+					      *pmpt_entry);
+		if (err) {
+			ib_umem_release(mmr->umem);
+			goto release_mpt_entry;
+		}
+
+		err = mlx4_ib_umem_write_mtt(dev, &mmr->mmr.mtt, mmr->umem);
+		if (err) {
+			mlx4_mr_rereg_mem_cleanup(dev->dev, &mmr->mmr);
+			ib_umem_release(mmr->umem);
+			goto release_mpt_entry;
+		}
+	}
+
+	/* If we couldn't transfer the MR to the HCA, just remember to
+	 * return a failure. But dereg_mr will free the resources.
+	 */
+	err = mlx4_mr_hw_write_mpt(dev->dev, &mmr->mmr, pmpt_entry);
+
+release_mpt_entry:
+	mlx4_mr_hw_put_mpt(dev->dev, pmpt_entry);
+
+	return err;
+}
+
 int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
 {
 	struct mlx4_ib_mr *mr = to_mmr(ibmr);
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 7efe6e3..8c574b6 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -2501,7 +2501,7 @@
 	spin_lock_irqsave(&qp->sq.lock, flags);
 
 	for (nreq = 0; wr; nreq++, wr = wr->next) {
-		if (unlikely(wr->opcode >= sizeof(mlx5_ib_opcode) / sizeof(mlx5_ib_opcode[0]))) {
+		if (unlikely(wr->opcode >= ARRAY_SIZE(mlx5_ib_opcode))) {
 			mlx5_ib_warn(dev, "\n");
 			err = -EINVAL;
 			*bad_wr = wr;
diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index b6f7f45..8881fa3 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -294,7 +294,7 @@
 			agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
 						      q ? IB_QPT_GSI : IB_QPT_SMI,
 						      NULL, 0, send_handler,
-						      NULL, NULL);
+						      NULL, NULL, 0);
 			if (IS_ERR(agent)) {
 				ret = PTR_ERR(agent);
 				goto err;
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h
index 19011db..b43456a 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma.h
@@ -40,7 +40,7 @@
 #include <be_roce.h>
 #include "ocrdma_sli.h"
 
-#define OCRDMA_ROCE_DRV_VERSION "10.2.145.0u"
+#define OCRDMA_ROCE_DRV_VERSION "10.2.287.0u"
 
 #define OCRDMA_ROCE_DRV_DESC "Emulex OneConnect RoCE Driver"
 #define OCRDMA_NODE_DESC "Emulex OneConnect RoCE HCA"
@@ -137,6 +137,7 @@
 	u16 cqe_status;
 	u16 ext_status;
 	bool cmd_done;
+	bool fw_error_state;
 };
 
 struct ocrdma_hw_mr {
@@ -235,7 +236,10 @@
 	struct list_head entry;
 	struct rcu_head rcu;
 	int id;
-	u64 stag_arr[OCRDMA_MAX_STAG];
+	u64 *stag_arr;
+	u8 sl; /* service level */
+	bool pfc_state;
+	atomic_t update_sl;
 	u16 pvid;
 	u32 asic_id;
 
@@ -518,4 +522,22 @@
 				OCRDMA_SLI_ASIC_GEN_NUM_SHIFT;
 }
 
+static inline u8 ocrdma_get_pfc_prio(u8 *pfc, u8 prio)
+{
+	return *(pfc + prio);
+}
+
+static inline u8 ocrdma_get_app_prio(u8 *app_prio, u8 prio)
+{
+	return *(app_prio + prio);
+}
+
+static inline u8 ocrdma_is_enabled_and_synced(u32 state)
+{	/* May also be used to interpret TC-state, QCN-state
+	 * Appl-state and Logical-link-state in future.
+	 */
+	return (state & OCRDMA_STATE_FLAG_ENABLED) &&
+		(state & OCRDMA_STATE_FLAG_SYNC);
+}
+
 #endif
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
index d4cc01f..40f8536 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
@@ -35,6 +35,8 @@
 #include "ocrdma_ah.h"
 #include "ocrdma_hw.h"
 
+#define OCRDMA_VID_PCP_SHIFT	0xD
+
 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
 				struct ib_ah_attr *attr, int pdid)
 {
@@ -55,7 +57,7 @@
 	if (vlan_tag && (vlan_tag < 0x1000)) {
 		eth.eth_type = cpu_to_be16(0x8100);
 		eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
-		vlan_tag |= (attr->sl & 7) << 13;
+		vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
 		eth.vlan_tag = cpu_to_be16(vlan_tag);
 		eth_sz = sizeof(struct ocrdma_eth_vlan);
 		vlan_enabled = true;
@@ -100,6 +102,8 @@
 	if (!(attr->ah_flags & IB_AH_GRH))
 		return ERR_PTR(-EINVAL);
 
+	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
+		ocrdma_init_service_level(dev);
 	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
 	if (!ah)
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index 3bbf201..dd35ae5 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -525,7 +525,7 @@
 
 	cmd->ev_cnt_flags = OCRDMA_CREATE_CQ_DEF_FLAGS;
 	cmd->eqn = eq->id;
-	cmd->cqe_count = cq->size / sizeof(struct ocrdma_mcqe);
+	cmd->pdid_cqecnt = cq->size / sizeof(struct ocrdma_mcqe);
 
 	ocrdma_build_q_pages(&cmd->pa[0], cq->size / OCRDMA_MIN_Q_PAGE_SIZE,
 			     cq->dma, PAGE_SIZE_4K);
@@ -661,7 +661,7 @@
 {
 	struct ocrdma_qp *qp = NULL;
 	struct ocrdma_cq *cq = NULL;
-	struct ib_event ib_evt = { 0 };
+	struct ib_event ib_evt;
 	int cq_event = 0;
 	int qp_event = 1;
 	int srq_event = 0;
@@ -674,6 +674,8 @@
 	if (cqe->cqvalid_cqid & OCRDMA_AE_MCQE_CQVALID)
 		cq = dev->cq_tbl[cqe->cqvalid_cqid & OCRDMA_AE_MCQE_CQID_MASK];
 
+	memset(&ib_evt, 0, sizeof(ib_evt));
+
 	ib_evt.device = &dev->ibdev;
 
 	switch (type) {
@@ -771,6 +773,10 @@
 					OCRDMA_AE_PVID_MCQE_TAG_MASK) >>
 					OCRDMA_AE_PVID_MCQE_TAG_SHIFT);
 		break;
+
+	case OCRDMA_ASYNC_EVENT_COS_VALUE:
+		atomic_set(&dev->update_sl, 1);
+		break;
 	default:
 		/* Not interested evts. */
 		break;
@@ -962,8 +968,12 @@
 				    msecs_to_jiffies(30000));
 	if (status)
 		return 0;
-	else
+	else {
+		dev->mqe_ctx.fw_error_state = true;
+		pr_err("%s(%d) mailbox timeout: fw not responding\n",
+		       __func__, dev->id);
 		return -1;
+	}
 }
 
 /* issue a mailbox command on the MQ */
@@ -975,6 +985,8 @@
 	struct ocrdma_mbx_rsp *rsp = NULL;
 
 	mutex_lock(&dev->mqe_ctx.lock);
+	if (dev->mqe_ctx.fw_error_state)
+		goto mbx_err;
 	ocrdma_post_mqe(dev, mqe);
 	status = ocrdma_wait_mqe_cmpl(dev);
 	if (status)
@@ -1078,7 +1090,8 @@
 	    OCRDMA_MBX_QUERY_CFG_CA_ACK_DELAY_SHIFT;
 	attr->max_mw = rsp->max_mw;
 	attr->max_mr = rsp->max_mr;
-	attr->max_mr_size = ~0ull;
+	attr->max_mr_size = ((u64)rsp->max_mr_size_hi << 32) |
+			      rsp->max_mr_size_lo;
 	attr->max_fmr = 0;
 	attr->max_pages_per_frmr = rsp->max_pages_per_frmr;
 	attr->max_num_mr_pbl = rsp->max_num_mr_pbl;
@@ -1252,7 +1265,9 @@
 		ctrl_attr_rsp = (struct ocrdma_get_ctrl_attribs_rsp *)dma.va;
 		hba_attribs = &ctrl_attr_rsp->ctrl_attribs.hba_attribs;
 
-		dev->hba_port_num = hba_attribs->phy_port;
+		dev->hba_port_num = (hba_attribs->ptpnum_maxdoms_hbast_cv &
+					OCRDMA_HBA_ATTRB_PTNUM_MASK)
+					>> OCRDMA_HBA_ATTRB_PTNUM_SHIFT;
 		strncpy(dev->model_number,
 			hba_attribs->controller_model_number, 31);
 	}
@@ -1302,7 +1317,8 @@
 		goto mbx_err;
 
 	rsp = (struct ocrdma_get_link_speed_rsp *)cmd;
-	*lnk_speed = rsp->phys_port_speed;
+	*lnk_speed = (rsp->pflt_pps_ld_pnum & OCRDMA_PHY_PS_MASK)
+			>> OCRDMA_PHY_PS_SHIFT;
 
 mbx_err:
 	kfree(cmd);
@@ -1328,11 +1344,16 @@
 		goto mbx_err;
 
 	rsp = (struct ocrdma_get_phy_info_rsp *)cmd;
-	dev->phy.phy_type = le16_to_cpu(rsp->phy_type);
+	dev->phy.phy_type =
+			(rsp->ityp_ptyp & OCRDMA_PHY_TYPE_MASK);
+	dev->phy.interface_type =
+			(rsp->ityp_ptyp & OCRDMA_IF_TYPE_MASK)
+				>> OCRDMA_IF_TYPE_SHIFT;
 	dev->phy.auto_speeds_supported  =
-			le16_to_cpu(rsp->auto_speeds_supported);
+			(rsp->fspeed_aspeed & OCRDMA_ASPEED_SUPP_MASK);
 	dev->phy.fixed_speeds_supported =
-			le16_to_cpu(rsp->fixed_speeds_supported);
+			(rsp->fspeed_aspeed & OCRDMA_FSPEED_SUPP_MASK)
+				>> OCRDMA_FSPEED_SUPP_SHIFT;
 mbx_err:
 	kfree(cmd);
 	return status;
@@ -1457,8 +1478,8 @@
 
 	pbes = (struct ocrdma_pbe *)dev->av_tbl.pbl.va;
 	for (i = 0; i < dev->av_tbl.size / OCRDMA_MIN_Q_PAGE_SIZE; i++) {
-		pbes[i].pa_lo = (u32) (pa & 0xffffffff);
-		pbes[i].pa_hi = (u32) upper_32_bits(pa);
+		pbes[i].pa_lo = (u32)cpu_to_le32(pa & 0xffffffff);
+		pbes[i].pa_hi = (u32)cpu_to_le32(upper_32_bits(pa));
 		pa += PAGE_SIZE;
 	}
 	cmd->tbl_addr[0].lo = (u32)(dev->av_tbl.pbl.pa & 0xFFFFFFFF);
@@ -1501,6 +1522,7 @@
 	ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
 	dma_free_coherent(&pdev->dev, dev->av_tbl.size, dev->av_tbl.va,
 			  dev->av_tbl.pa);
+	dev->av_tbl.va = NULL;
 	dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->av_tbl.pbl.va,
 			  dev->av_tbl.pbl.pa);
 	kfree(cmd);
@@ -1624,14 +1646,16 @@
 			cmd->cmd.pgsz_pgcnt |= OCRDMA_CREATE_CQ_DPP <<
 				OCRDMA_CREATE_CQ_TYPE_SHIFT;
 		cq->phase_change = false;
-		cmd->cmd.cqe_count = (cq->len / cqe_size);
+		cmd->cmd.pdid_cqecnt = (cq->len / cqe_size);
 	} else {
-		cmd->cmd.cqe_count = (cq->len / cqe_size) - 1;
+		cmd->cmd.pdid_cqecnt = (cq->len / cqe_size) - 1;
 		cmd->cmd.ev_cnt_flags |= OCRDMA_CREATE_CQ_FLAGS_AUTO_VALID;
 		cq->phase_change = true;
 	}
 
-	cmd->cmd.pd_id = pd_id; /* valid only for v3 */
+	/* pd_id valid only for v3 */
+	cmd->cmd.pdid_cqecnt |= (pd_id <<
+		OCRDMA_CREATE_CQ_CMD_PDID_SHIFT);
 	ocrdma_build_q_pages(&cmd->cmd.pa[0], hw_pages, cq->pa, page_size);
 	status = ocrdma_mbx_cmd(dev, (struct ocrdma_mqe *)cmd);
 	if (status)
@@ -2206,7 +2230,8 @@
 				OCRDMA_CREATE_QP_REQ_RQ_CQID_MASK;
 	qp->rq_cq = cq;
 
-	if (pd->dpp_enabled && pd->num_dpp_qp) {
+	if (pd->dpp_enabled && attrs->cap.max_inline_data && pd->num_dpp_qp &&
+	    (attrs->cap.max_inline_data <= dev->attr.max_inline_data)) {
 		ocrdma_set_create_qp_dpp_cmd(cmd, pd, qp, enable_dpp_cq,
 					     dpp_cq_id);
 	}
@@ -2264,6 +2289,8 @@
 
 	if ((ah_attr->ah_flags & IB_AH_GRH) == 0)
 		return -EINVAL;
+	if (atomic_cmpxchg(&qp->dev->update_sl, 1, 0))
+		ocrdma_init_service_level(qp->dev);
 	cmd->params.tclass_sq_psn |=
 	    (ah_attr->grh.traffic_class << OCRDMA_QP_PARAMS_TCLASS_SHIFT);
 	cmd->params.rnt_rc_sl_fl |=
@@ -2297,6 +2324,8 @@
 		cmd->params.vlan_dmac_b4_to_b5 |=
 		    vlan_id << OCRDMA_QP_PARAMS_VLAN_SHIFT;
 		cmd->flags |= OCRDMA_QP_PARA_VLAN_EN_VALID;
+		cmd->params.rnt_rc_sl_fl |=
+			(qp->dev->sl & 0x07) << OCRDMA_QP_PARAMS_SL_SHIFT;
 	}
 	return 0;
 }
@@ -2604,6 +2633,168 @@
 	return status;
 }
 
+static int ocrdma_mbx_get_dcbx_config(struct ocrdma_dev *dev, u32 ptype,
+				      struct ocrdma_dcbx_cfg *dcbxcfg)
+{
+	int status = 0;
+	dma_addr_t pa;
+	struct ocrdma_mqe cmd;
+
+	struct ocrdma_get_dcbx_cfg_req *req = NULL;
+	struct ocrdma_get_dcbx_cfg_rsp *rsp = NULL;
+	struct pci_dev *pdev = dev->nic_info.pdev;
+	struct ocrdma_mqe_sge *mqe_sge = cmd.u.nonemb_req.sge;
+
+	memset(&cmd, 0, sizeof(struct ocrdma_mqe));
+	cmd.hdr.pyld_len = max_t (u32, sizeof(struct ocrdma_get_dcbx_cfg_rsp),
+					sizeof(struct ocrdma_get_dcbx_cfg_req));
+	req = dma_alloc_coherent(&pdev->dev, cmd.hdr.pyld_len, &pa, GFP_KERNEL);
+	if (!req) {
+		status = -ENOMEM;
+		goto mem_err;
+	}
+
+	cmd.hdr.spcl_sge_cnt_emb |= (1 << OCRDMA_MQE_HDR_SGE_CNT_SHIFT) &
+					OCRDMA_MQE_HDR_SGE_CNT_MASK;
+	mqe_sge->pa_lo = (u32) (pa & 0xFFFFFFFFUL);
+	mqe_sge->pa_hi = (u32) upper_32_bits(pa);
+	mqe_sge->len = cmd.hdr.pyld_len;
+
+	memset(req, 0, sizeof(struct ocrdma_get_dcbx_cfg_req));
+	ocrdma_init_mch(&req->hdr, OCRDMA_CMD_GET_DCBX_CONFIG,
+			OCRDMA_SUBSYS_DCBX, cmd.hdr.pyld_len);
+	req->param_type = ptype;
+
+	status = ocrdma_mbx_cmd(dev, &cmd);
+	if (status)
+		goto mbx_err;
+
+	rsp = (struct ocrdma_get_dcbx_cfg_rsp *)req;
+	ocrdma_le32_to_cpu(rsp, sizeof(struct ocrdma_get_dcbx_cfg_rsp));
+	memcpy(dcbxcfg, &rsp->cfg, sizeof(struct ocrdma_dcbx_cfg));
+
+mbx_err:
+	dma_free_coherent(&pdev->dev, cmd.hdr.pyld_len, req, pa);
+mem_err:
+	return status;
+}
+
+#define OCRDMA_MAX_SERVICE_LEVEL_INDEX	0x08
+#define OCRDMA_DEFAULT_SERVICE_LEVEL	0x05
+
+static int ocrdma_parse_dcbxcfg_rsp(struct ocrdma_dev *dev, int ptype,
+				    struct ocrdma_dcbx_cfg *dcbxcfg,
+				    u8 *srvc_lvl)
+{
+	int status = -EINVAL, indx, slindx;
+	int ventry_cnt;
+	struct ocrdma_app_parameter *app_param;
+	u8 valid, proto_sel;
+	u8 app_prio, pfc_prio;
+	u16 proto;
+
+	if (!(dcbxcfg->tcv_aev_opv_st & OCRDMA_DCBX_STATE_MASK)) {
+		pr_info("%s ocrdma%d DCBX is disabled\n",
+			dev_name(&dev->nic_info.pdev->dev), dev->id);
+		goto out;
+	}
+
+	if (!ocrdma_is_enabled_and_synced(dcbxcfg->pfc_state)) {
+		pr_info("%s ocrdma%d priority flow control(%s) is %s%s\n",
+			dev_name(&dev->nic_info.pdev->dev), dev->id,
+			(ptype > 0 ? "operational" : "admin"),
+			(dcbxcfg->pfc_state & OCRDMA_STATE_FLAG_ENABLED) ?
+			"enabled" : "disabled",
+			(dcbxcfg->pfc_state & OCRDMA_STATE_FLAG_SYNC) ?
+			"" : ", not sync'ed");
+		goto out;
+	} else {
+		pr_info("%s ocrdma%d priority flow control is enabled and sync'ed\n",
+			dev_name(&dev->nic_info.pdev->dev), dev->id);
+	}
+
+	ventry_cnt = (dcbxcfg->tcv_aev_opv_st >>
+				OCRDMA_DCBX_APP_ENTRY_SHIFT)
+				& OCRDMA_DCBX_STATE_MASK;
+
+	for (indx = 0; indx < ventry_cnt; indx++) {
+		app_param = &dcbxcfg->app_param[indx];
+		valid = (app_param->valid_proto_app >>
+				OCRDMA_APP_PARAM_VALID_SHIFT)
+				& OCRDMA_APP_PARAM_VALID_MASK;
+		proto_sel = (app_param->valid_proto_app
+				>>  OCRDMA_APP_PARAM_PROTO_SEL_SHIFT)
+				& OCRDMA_APP_PARAM_PROTO_SEL_MASK;
+		proto = app_param->valid_proto_app &
+				OCRDMA_APP_PARAM_APP_PROTO_MASK;
+
+		if (
+			valid && proto == OCRDMA_APP_PROTO_ROCE &&
+			proto_sel == OCRDMA_PROTO_SELECT_L2) {
+			for (slindx = 0; slindx <
+				OCRDMA_MAX_SERVICE_LEVEL_INDEX; slindx++) {
+				app_prio = ocrdma_get_app_prio(
+						(u8 *)app_param->app_prio,
+						slindx);
+				pfc_prio = ocrdma_get_pfc_prio(
+						(u8 *)dcbxcfg->pfc_prio,
+						slindx);
+
+				if (app_prio && pfc_prio) {
+					*srvc_lvl = slindx;
+					status = 0;
+					goto out;
+				}
+			}
+			if (slindx == OCRDMA_MAX_SERVICE_LEVEL_INDEX) {
+				pr_info("%s ocrdma%d application priority not set for 0x%x protocol\n",
+					dev_name(&dev->nic_info.pdev->dev),
+					dev->id, proto);
+			}
+		}
+	}
+
+out:
+	return status;
+}
+
+void ocrdma_init_service_level(struct ocrdma_dev *dev)
+{
+	int status = 0, indx;
+	struct ocrdma_dcbx_cfg dcbxcfg;
+	u8 srvc_lvl = OCRDMA_DEFAULT_SERVICE_LEVEL;
+	int ptype = OCRDMA_PARAMETER_TYPE_OPER;
+
+	for (indx = 0; indx < 2; indx++) {
+		status = ocrdma_mbx_get_dcbx_config(dev, ptype, &dcbxcfg);
+		if (status) {
+			pr_err("%s(): status=%d\n", __func__, status);
+			ptype = OCRDMA_PARAMETER_TYPE_ADMIN;
+			continue;
+		}
+
+		status = ocrdma_parse_dcbxcfg_rsp(dev, ptype,
+						  &dcbxcfg, &srvc_lvl);
+		if (status) {
+			ptype = OCRDMA_PARAMETER_TYPE_ADMIN;
+			continue;
+		}
+
+		break;
+	}
+
+	if (status)
+		pr_info("%s ocrdma%d service level default\n",
+			dev_name(&dev->nic_info.pdev->dev), dev->id);
+	else
+		pr_info("%s ocrdma%d service level %d\n",
+			dev_name(&dev->nic_info.pdev->dev), dev->id,
+			srvc_lvl);
+
+	dev->pfc_state = ocrdma_is_enabled_and_synced(dcbxcfg.pfc_state);
+	dev->sl = srvc_lvl;
+}
+
 int ocrdma_alloc_av(struct ocrdma_dev *dev, struct ocrdma_ah *ah)
 {
 	int i;
@@ -2709,13 +2900,15 @@
 		goto conf_err;
 	status = ocrdma_mbx_get_phy_info(dev);
 	if (status)
-		goto conf_err;
+		goto info_attrb_err;
 	status = ocrdma_mbx_get_ctrl_attribs(dev);
 	if (status)
-		goto conf_err;
+		goto info_attrb_err;
 
 	return 0;
 
+info_attrb_err:
+	ocrdma_mbx_delete_ah_tbl(dev);
 conf_err:
 	ocrdma_destroy_mq(dev);
 mq_err:
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
index e513f72..6eed8f19 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
@@ -135,4 +135,6 @@
 
 int ocrdma_mbx_rdma_stats(struct ocrdma_dev *, bool reset);
 char *port_speed_string(struct ocrdma_dev *dev);
+void ocrdma_init_service_level(struct ocrdma_dev *);
+
 #endif				/* __OCRDMA_HW_H__ */
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index 7c504e0..256a06b 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -324,6 +324,11 @@
 		if (!dev->qp_tbl)
 			goto alloc_err;
 	}
+
+	dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL);
+	if (dev->stag_arr == NULL)
+		goto alloc_err;
+
 	spin_lock_init(&dev->av_tbl.lock);
 	spin_lock_init(&dev->flush_q_lock);
 	return 0;
@@ -334,6 +339,7 @@
 
 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 {
+	kfree(dev->stag_arr);
 	kfree(dev->qp_tbl);
 	kfree(dev->cq_tbl);
 	kfree(dev->sgid_tbl);
@@ -353,15 +359,25 @@
 {
 	struct ocrdma_dev *dev = dev_get_drvdata(device);
 
-	return scnprintf(buf, PAGE_SIZE, "%s", &dev->attr.fw_ver[0]);
+	return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->attr.fw_ver[0]);
+}
+
+static ssize_t show_hca_type(struct device *device,
+			     struct device_attribute *attr, char *buf)
+{
+	struct ocrdma_dev *dev = dev_get_drvdata(device);
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
 }
 
 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
+static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
 
 static struct device_attribute *ocrdma_attributes[] = {
 	&dev_attr_hw_rev,
-	&dev_attr_fw_ver
+	&dev_attr_fw_ver,
+	&dev_attr_hca_type
 };
 
 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
@@ -372,6 +388,58 @@
 		device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
 }
 
+static void ocrdma_init_ipv4_gids(struct ocrdma_dev *dev,
+				  struct net_device *net)
+{
+	struct in_device *in_dev;
+	union ib_gid gid;
+	in_dev = in_dev_get(net);
+	if (in_dev) {
+		for_ifa(in_dev) {
+			ipv6_addr_set_v4mapped(ifa->ifa_address,
+					       (struct in6_addr *)&gid);
+			ocrdma_add_sgid(dev, &gid);
+		}
+		endfor_ifa(in_dev);
+		in_dev_put(in_dev);
+	}
+}
+
+static void ocrdma_init_ipv6_gids(struct ocrdma_dev *dev,
+				  struct net_device *net)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	struct inet6_dev *in6_dev;
+	union ib_gid  *pgid;
+	struct inet6_ifaddr *ifp;
+	in6_dev = in6_dev_get(net);
+	if (in6_dev) {
+		read_lock_bh(&in6_dev->lock);
+		list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
+			pgid = (union ib_gid *)&ifp->addr;
+			ocrdma_add_sgid(dev, pgid);
+		}
+		read_unlock_bh(&in6_dev->lock);
+		in6_dev_put(in6_dev);
+	}
+#endif
+}
+
+static void ocrdma_init_gid_table(struct ocrdma_dev *dev)
+{
+	struct  net_device *net_dev;
+
+	for_each_netdev(&init_net, net_dev) {
+		struct net_device *real_dev = rdma_vlan_dev_real_dev(net_dev) ?
+				rdma_vlan_dev_real_dev(net_dev) : net_dev;
+
+		if (real_dev == dev->nic_info.netdev) {
+			ocrdma_init_ipv4_gids(dev, net_dev);
+			ocrdma_init_ipv6_gids(dev, net_dev);
+		}
+	}
+}
+
 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 {
 	int status = 0, i;
@@ -399,6 +467,8 @@
 	if (status)
 		goto alloc_err;
 
+	ocrdma_init_service_level(dev);
+	ocrdma_init_gid_table(dev);
 	status = ocrdma_register_device(dev);
 	if (status)
 		goto alloc_err;
@@ -508,6 +578,12 @@
 	return 0;
 }
 
+static void ocrdma_shutdown(struct ocrdma_dev *dev)
+{
+	ocrdma_close(dev);
+	ocrdma_remove(dev);
+}
+
 /* event handling via NIC driver ensures that all the NIC specific
  * initialization done before RoCE driver notifies
  * event to stack.
@@ -521,6 +597,9 @@
 	case BE_DEV_DOWN:
 		ocrdma_close(dev);
 		break;
+	case BE_DEV_SHUTDOWN:
+		ocrdma_shutdown(dev);
+		break;
 	}
 }
 
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
index 96c9ee6..904989e 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
@@ -44,35 +44,39 @@
 #define OCRDMA_SUBSYS_ROCE 10
 enum {
 	OCRDMA_CMD_QUERY_CONFIG = 1,
-	OCRDMA_CMD_ALLOC_PD,
-	OCRDMA_CMD_DEALLOC_PD,
+	OCRDMA_CMD_ALLOC_PD = 2,
+	OCRDMA_CMD_DEALLOC_PD = 3,
 
-	OCRDMA_CMD_CREATE_AH_TBL,
-	OCRDMA_CMD_DELETE_AH_TBL,
+	OCRDMA_CMD_CREATE_AH_TBL = 4,
+	OCRDMA_CMD_DELETE_AH_TBL = 5,
 
-	OCRDMA_CMD_CREATE_QP,
-	OCRDMA_CMD_QUERY_QP,
-	OCRDMA_CMD_MODIFY_QP,
-	OCRDMA_CMD_DELETE_QP,
+	OCRDMA_CMD_CREATE_QP = 6,
+	OCRDMA_CMD_QUERY_QP = 7,
+	OCRDMA_CMD_MODIFY_QP = 8 ,
+	OCRDMA_CMD_DELETE_QP = 9,
 
-	OCRDMA_CMD_RSVD1,
-	OCRDMA_CMD_ALLOC_LKEY,
-	OCRDMA_CMD_DEALLOC_LKEY,
-	OCRDMA_CMD_REGISTER_NSMR,
-	OCRDMA_CMD_REREGISTER_NSMR,
-	OCRDMA_CMD_REGISTER_NSMR_CONT,
-	OCRDMA_CMD_QUERY_NSMR,
-	OCRDMA_CMD_ALLOC_MW,
-	OCRDMA_CMD_QUERY_MW,
+	OCRDMA_CMD_RSVD1 = 10,
+	OCRDMA_CMD_ALLOC_LKEY = 11,
+	OCRDMA_CMD_DEALLOC_LKEY = 12,
+	OCRDMA_CMD_REGISTER_NSMR = 13,
+	OCRDMA_CMD_REREGISTER_NSMR = 14,
+	OCRDMA_CMD_REGISTER_NSMR_CONT = 15,
+	OCRDMA_CMD_QUERY_NSMR = 16,
+	OCRDMA_CMD_ALLOC_MW = 17,
+	OCRDMA_CMD_QUERY_MW = 18,
 
-	OCRDMA_CMD_CREATE_SRQ,
-	OCRDMA_CMD_QUERY_SRQ,
-	OCRDMA_CMD_MODIFY_SRQ,
-	OCRDMA_CMD_DELETE_SRQ,
+	OCRDMA_CMD_CREATE_SRQ = 19,
+	OCRDMA_CMD_QUERY_SRQ = 20,
+	OCRDMA_CMD_MODIFY_SRQ = 21,
+	OCRDMA_CMD_DELETE_SRQ = 22,
 
-	OCRDMA_CMD_ATTACH_MCAST,
-	OCRDMA_CMD_DETACH_MCAST,
-	OCRDMA_CMD_GET_RDMA_STATS,
+	OCRDMA_CMD_ATTACH_MCAST = 23,
+	OCRDMA_CMD_DETACH_MCAST = 24,
+
+	OCRDMA_CMD_CREATE_RBQ = 25,
+	OCRDMA_CMD_DESTROY_RBQ = 26,
+
+	OCRDMA_CMD_GET_RDMA_STATS = 27,
 
 	OCRDMA_CMD_MAX
 };
@@ -103,7 +107,7 @@
 
 #define OCRDMA_MAX_QP    2048
 #define OCRDMA_MAX_CQ    2048
-#define OCRDMA_MAX_STAG  8192
+#define OCRDMA_MAX_STAG 16384
 
 enum {
 	OCRDMA_DB_RQ_OFFSET		= 0xE0,
@@ -422,7 +426,12 @@
 
 #define OCRDMA_ASYNC_RDMA_EVE_CODE 0x14
 #define OCRDMA_ASYNC_GRP5_EVE_CODE 0x5
-#define OCRDMA_ASYNC_EVENT_PVID_STATE 0x3
+
+enum ocrdma_async_grp5_events {
+	OCRDMA_ASYNC_EVENT_QOS_VALUE	= 0x01,
+	OCRDMA_ASYNC_EVENT_COS_VALUE	= 0x02,
+	OCRDMA_ASYNC_EVENT_PVID_STATE	= 0x03
+};
 
 enum OCRDMA_ASYNC_EVENT_TYPE {
 	OCRDMA_CQ_ERROR			= 0x00,
@@ -525,8 +534,8 @@
 	u32 max_ird_ord_per_qp;
 	u32 max_shared_ird_ord;
 	u32 max_mr;
-	u32 max_mr_size_lo;
 	u32 max_mr_size_hi;
+	u32 max_mr_size_lo;
 	u32 max_num_mr_pbl;
 	u32 max_mw;
 	u32 max_fmr;
@@ -580,17 +589,26 @@
 	OCRDMA_FN_MODE_RDMA	= 0x4
 };
 
+enum {
+	OCRDMA_IF_TYPE_MASK		= 0xFFFF0000,
+	OCRDMA_IF_TYPE_SHIFT		= 0x10,
+	OCRDMA_PHY_TYPE_MASK		= 0x0000FFFF,
+	OCRDMA_FUTURE_DETAILS_MASK	= 0xFFFF0000,
+	OCRDMA_FUTURE_DETAILS_SHIFT	= 0x10,
+	OCRDMA_EX_PHY_DETAILS_MASK	= 0x0000FFFF,
+	OCRDMA_FSPEED_SUPP_MASK		= 0xFFFF0000,
+	OCRDMA_FSPEED_SUPP_SHIFT	= 0x10,
+	OCRDMA_ASPEED_SUPP_MASK		= 0x0000FFFF
+};
+
 struct ocrdma_get_phy_info_rsp {
 	struct ocrdma_mqe_hdr hdr;
 	struct ocrdma_mbx_rsp rsp;
 
-	u16 phy_type;
-	u16 interface_type;
+	u32 ityp_ptyp;
 	u32 misc_params;
-	u16 ext_phy_details;
-	u16 rsvd;
-	u16 auto_speeds_supported;
-	u16 fixed_speeds_supported;
+	u32 ftrdtl_exphydtl;
+	u32 fspeed_aspeed;
 	u32 future_use[2];
 };
 
@@ -603,19 +621,34 @@
 	OCRDMA_PHY_SPEED_40GBPS = 0x20
 };
 
+enum {
+	OCRDMA_PORT_NUM_MASK	= 0x3F,
+	OCRDMA_PT_MASK		= 0xC0,
+	OCRDMA_PT_SHIFT		= 0x6,
+	OCRDMA_LINK_DUP_MASK	= 0x0000FF00,
+	OCRDMA_LINK_DUP_SHIFT	= 0x8,
+	OCRDMA_PHY_PS_MASK	= 0x00FF0000,
+	OCRDMA_PHY_PS_SHIFT	= 0x10,
+	OCRDMA_PHY_PFLT_MASK	= 0xFF000000,
+	OCRDMA_PHY_PFLT_SHIFT	= 0x18,
+	OCRDMA_QOS_LNKSP_MASK	= 0xFFFF0000,
+	OCRDMA_QOS_LNKSP_SHIFT	= 0x10,
+	OCRDMA_LLST_MASK	= 0xFF,
+	OCRDMA_PLFC_MASK	= 0x00000400,
+	OCRDMA_PLFC_SHIFT	= 0x8,
+	OCRDMA_PLRFC_MASK	= 0x00000200,
+	OCRDMA_PLRFC_SHIFT	= 0x8,
+	OCRDMA_PLTFC_MASK	= 0x00000100,
+	OCRDMA_PLTFC_SHIFT	= 0x8
+};
 
 struct ocrdma_get_link_speed_rsp {
 	struct ocrdma_mqe_hdr hdr;
 	struct ocrdma_mbx_rsp rsp;
 
-	u8 pt_port_num;
-	u8 link_duplex;
-	u8 phys_port_speed;
-	u8 phys_port_fault;
-	u16 rsvd1;
-	u16 qos_lnk_speed;
-	u8 logical_lnk_status;
-	u8 rsvd2[3];
+	u32 pflt_pps_ld_pnum;
+	u32 qos_lsp;
+	u32 res_lls;
 };
 
 enum {
@@ -666,8 +699,7 @@
 	u32 pgsz_pgcnt;
 	u32 ev_cnt_flags;
 	u32 eqn;
-	u16 cqe_count;
-	u16 pd_id;
+	u32 pdid_cqecnt;
 	u32 rsvd6;
 	struct ocrdma_pa pa[OCRDMA_CREATE_CQ_MAX_PAGES];
 };
@@ -678,6 +710,10 @@
 };
 
 enum {
+	OCRDMA_CREATE_CQ_CMD_PDID_SHIFT	= 0x10
+};
+
+enum {
 	OCRDMA_CREATE_CQ_RSP_CQ_ID_MASK	= 0xFFFF
 };
 
@@ -1231,7 +1267,6 @@
 
 enum {
 	OCRDMA_ALLOC_PD_ENABLE_DPP	= BIT(16),
-	OCRDMA_PD_MAX_DPP_ENABLED_QP	= 8,
 	OCRDMA_DPP_PAGE_SIZE		= 4096
 };
 
@@ -1896,12 +1931,62 @@
 	struct ocrdma_rx_dbg_stats	rx_dbg_stats;
 } __packed;
 
+enum {
+	OCRDMA_HBA_ATTRB_EPROM_VER_LO_MASK	= 0xFF,
+	OCRDMA_HBA_ATTRB_EPROM_VER_HI_MASK	= 0xFF00,
+	OCRDMA_HBA_ATTRB_EPROM_VER_HI_SHIFT	= 0x08,
+	OCRDMA_HBA_ATTRB_CDBLEN_MASK		= 0xFFFF,
+	OCRDMA_HBA_ATTRB_ASIC_REV_MASK		= 0xFF0000,
+	OCRDMA_HBA_ATTRB_ASIC_REV_SHIFT		= 0x10,
+	OCRDMA_HBA_ATTRB_GUID0_MASK		= 0xFF000000,
+	OCRDMA_HBA_ATTRB_GUID0_SHIFT		= 0x18,
+	OCRDMA_HBA_ATTRB_GUID13_MASK		= 0xFF,
+	OCRDMA_HBA_ATTRB_GUID14_MASK		= 0xFF00,
+	OCRDMA_HBA_ATTRB_GUID14_SHIFT		= 0x08,
+	OCRDMA_HBA_ATTRB_GUID15_MASK		= 0xFF0000,
+	OCRDMA_HBA_ATTRB_GUID15_SHIFT		= 0x10,
+	OCRDMA_HBA_ATTRB_PCNT_MASK		= 0xFF000000,
+	OCRDMA_HBA_ATTRB_PCNT_SHIFT		= 0x18,
+	OCRDMA_HBA_ATTRB_LDTOUT_MASK		= 0xFFFF,
+	OCRDMA_HBA_ATTRB_ISCSI_VER_MASK		= 0xFF0000,
+	OCRDMA_HBA_ATTRB_ISCSI_VER_SHIFT	= 0x10,
+	OCRDMA_HBA_ATTRB_MFUNC_DEV_MASK		= 0xFF000000,
+	OCRDMA_HBA_ATTRB_MFUNC_DEV_SHIFT	= 0x18,
+	OCRDMA_HBA_ATTRB_CV_MASK		= 0xFF,
+	OCRDMA_HBA_ATTRB_HBA_ST_MASK		= 0xFF00,
+	OCRDMA_HBA_ATTRB_HBA_ST_SHIFT		= 0x08,
+	OCRDMA_HBA_ATTRB_MAX_DOMS_MASK		= 0xFF0000,
+	OCRDMA_HBA_ATTRB_MAX_DOMS_SHIFT		= 0x10,
+	OCRDMA_HBA_ATTRB_PTNUM_MASK		= 0x3F000000,
+	OCRDMA_HBA_ATTRB_PTNUM_SHIFT		= 0x18,
+	OCRDMA_HBA_ATTRB_PT_MASK		= 0xC0000000,
+	OCRDMA_HBA_ATTRB_PT_SHIFT		= 0x1E,
+	OCRDMA_HBA_ATTRB_ISCSI_FET_MASK		= 0xFF,
+	OCRDMA_HBA_ATTRB_ASIC_GEN_MASK		= 0xFF00,
+	OCRDMA_HBA_ATTRB_ASIC_GEN_SHIFT		= 0x08,
+	OCRDMA_HBA_ATTRB_PCI_VID_MASK		= 0xFFFF,
+	OCRDMA_HBA_ATTRB_PCI_DID_MASK		= 0xFFFF0000,
+	OCRDMA_HBA_ATTRB_PCI_DID_SHIFT		= 0x10,
+	OCRDMA_HBA_ATTRB_PCI_SVID_MASK		= 0xFFFF,
+	OCRDMA_HBA_ATTRB_PCI_SSID_MASK		= 0xFFFF0000,
+	OCRDMA_HBA_ATTRB_PCI_SSID_SHIFT		= 0x10,
+	OCRDMA_HBA_ATTRB_PCI_BUSNUM_MASK	= 0xFF,
+	OCRDMA_HBA_ATTRB_PCI_DEVNUM_MASK	= 0xFF00,
+	OCRDMA_HBA_ATTRB_PCI_DEVNUM_SHIFT	= 0x08,
+	OCRDMA_HBA_ATTRB_PCI_FUNCNUM_MASK	= 0xFF0000,
+	OCRDMA_HBA_ATTRB_PCI_FUNCNUM_SHIFT	= 0x10,
+	OCRDMA_HBA_ATTRB_IF_TYPE_MASK		= 0xFF000000,
+	OCRDMA_HBA_ATTRB_IF_TYPE_SHIFT		= 0x18,
+	OCRDMA_HBA_ATTRB_NETFIL_MASK		=0xFF
+};
 
 struct mgmt_hba_attribs {
 	u8 flashrom_version_string[32];
 	u8 manufacturer_name[32];
 	u32 supported_modes;
-	u32 rsvd0[3];
+	u32 rsvd_eprom_verhi_verlo;
+	u32 mbx_ds_ver;
+	u32 epfw_ds_ver;
 	u8 ncsi_ver_string[12];
 	u32 default_extended_timeout;
 	u8 controller_model_number[32];
@@ -1914,34 +1999,26 @@
 	u8 driver_version_string[32];
 	u8 fw_on_flash_version_string[32];
 	u32 functionalities_supported;
-	u16 max_cdblength;
-	u8 asic_revision;
-	u8 generational_guid[16];
-	u8 hba_port_count;
-	u16 default_link_down_timeout;
-	u8 iscsi_ver_min_max;
-	u8 multifunction_device;
-	u8 cache_valid;
-	u8 hba_status;
-	u8 max_domains_supported;
-	u8 phy_port;
+	u32 guid0_asicrev_cdblen;
+	u8 generational_guid[12];
+	u32 portcnt_guid15;
+	u32 mfuncdev_iscsi_ldtout;
+	u32 ptpnum_maxdoms_hbast_cv;
 	u32 firmware_post_status;
 	u32 hba_mtu[8];
-	u32 rsvd1[4];
+	u32 res_asicgen_iscsi_feaures;
+	u32 rsvd1[3];
 };
 
 struct mgmt_controller_attrib {
 	struct mgmt_hba_attribs hba_attribs;
-	u16 pci_vendor_id;
-	u16 pci_device_id;
-	u16 pci_sub_vendor_id;
-	u16 pci_sub_system_id;
-	u8 pci_bus_number;
-	u8 pci_device_number;
-	u8 pci_function_number;
-	u8 interface_type;
-	u64 unique_identifier;
-	u32 rsvd0[5];
+	u32 pci_did_vid;
+	u32 pci_ssid_svid;
+	u32 ityp_fnum_devnum_bnum;
+	u32 uid_hi;
+	u32 uid_lo;
+	u32 res_nnetfil;
+	u32 rsvd0[4];
 };
 
 struct ocrdma_get_ctrl_attribs_rsp {
@@ -1949,5 +2026,79 @@
 	struct mgmt_controller_attrib ctrl_attribs;
 };
 
+#define OCRDMA_SUBSYS_DCBX 0x10
+
+enum OCRDMA_DCBX_OPCODE {
+	OCRDMA_CMD_GET_DCBX_CONFIG = 0x01
+};
+
+enum OCRDMA_DCBX_PARAM_TYPE {
+	OCRDMA_PARAMETER_TYPE_ADMIN	= 0x00,
+	OCRDMA_PARAMETER_TYPE_OPER	= 0x01,
+	OCRDMA_PARAMETER_TYPE_PEER	= 0x02
+};
+
+enum OCRDMA_DCBX_APP_PROTO {
+	OCRDMA_APP_PROTO_ROCE	= 0x8915
+};
+
+enum OCRDMA_DCBX_PROTO {
+	OCRDMA_PROTO_SELECT_L2	= 0x00,
+	OCRDMA_PROTO_SELECT_L4	= 0x01
+};
+
+enum OCRDMA_DCBX_APP_PARAM {
+	OCRDMA_APP_PARAM_APP_PROTO_MASK = 0xFFFF,
+	OCRDMA_APP_PARAM_PROTO_SEL_MASK = 0xFF,
+	OCRDMA_APP_PARAM_PROTO_SEL_SHIFT = 0x10,
+	OCRDMA_APP_PARAM_VALID_MASK	= 0xFF,
+	OCRDMA_APP_PARAM_VALID_SHIFT	= 0x18
+};
+
+enum OCRDMA_DCBX_STATE_FLAGS {
+	OCRDMA_STATE_FLAG_ENABLED	= 0x01,
+	OCRDMA_STATE_FLAG_ADDVERTISED	= 0x02,
+	OCRDMA_STATE_FLAG_WILLING	= 0x04,
+	OCRDMA_STATE_FLAG_SYNC		= 0x08,
+	OCRDMA_STATE_FLAG_UNSUPPORTED	= 0x40000000,
+	OCRDMA_STATE_FLAG_NEG_FAILD	= 0x80000000
+};
+
+enum OCRDMA_TCV_AEV_OPV_ST {
+	OCRDMA_DCBX_TC_SUPPORT_MASK	= 0xFF,
+	OCRDMA_DCBX_TC_SUPPORT_SHIFT	= 0x18,
+	OCRDMA_DCBX_APP_ENTRY_SHIFT	= 0x10,
+	OCRDMA_DCBX_OP_PARAM_SHIFT	= 0x08,
+	OCRDMA_DCBX_STATE_MASK		= 0xFF
+};
+
+struct ocrdma_app_parameter {
+	u32 valid_proto_app;
+	u32 oui;
+	u32 app_prio[2];
+};
+
+struct ocrdma_dcbx_cfg {
+	u32 tcv_aev_opv_st;
+	u32 tc_state;
+	u32 pfc_state;
+	u32 qcn_state;
+	u32 appl_state;
+	u32 ll_state;
+	u32 tc_bw[2];
+	u32 tc_prio[8];
+	u32 pfc_prio[2];
+	struct ocrdma_app_parameter app_param[15];
+};
+
+struct ocrdma_get_dcbx_cfg_req {
+	struct ocrdma_mbx_hdr hdr;
+	u32 param_type;
+} __packed;
+
+struct ocrdma_get_dcbx_cfg_rsp {
+	struct ocrdma_mbx_rsp hdr;
+	struct ocrdma_dcbx_cfg cfg;
+} __packed;
 
 #endif				/* __OCRDMA_SLI_H__ */
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index edf6211..acb434d 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -69,11 +69,11 @@
 	memcpy(&attr->fw_ver, &dev->attr.fw_ver[0],
 	       min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver)));
 	ocrdma_get_guid(dev, (u8 *)&attr->sys_image_guid);
-	attr->max_mr_size = ~0ull;
+	attr->max_mr_size = dev->attr.max_mr_size;
 	attr->page_size_cap = 0xffff000;
 	attr->vendor_id = dev->nic_info.pdev->vendor;
 	attr->vendor_part_id = dev->nic_info.pdev->device;
-	attr->hw_ver = 0;
+	attr->hw_ver = dev->asic_id;
 	attr->max_qp = dev->attr.max_qp;
 	attr->max_ah = OCRDMA_MAX_AH;
 	attr->max_qp_wr = dev->attr.max_wqe;
@@ -268,7 +268,8 @@
 		pd->dpp_enabled =
 			ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
 		pd->num_dpp_qp =
-			pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0;
+			pd->dpp_enabled ? (dev->nic_info.db_page_size /
+					   dev->attr.wqe_size) : 0;
 	}
 
 retry:
@@ -328,7 +329,10 @@
 	struct ocrdma_pd *pd = uctx->cntxt_pd;
 	struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
 
-	BUG_ON(uctx->pd_in_use);
+	if (uctx->pd_in_use) {
+		pr_err("%s(%d) Freeing in use pdid=0x%x.\n",
+		       __func__, dev->id, pd->id);
+	}
 	uctx->cntxt_pd = NULL;
 	status = _ocrdma_dealloc_pd(dev, pd);
 	return status;
@@ -843,6 +847,13 @@
 	if (mr->umem)
 		ib_umem_release(mr->umem);
 	kfree(mr);
+
+	/* Don't stop cleanup, in case FW is unresponsive */
+	if (dev->mqe_ctx.fw_error_state) {
+		status = 0;
+		pr_err("%s(%d) fw not responding.\n",
+		       __func__, dev->id);
+	}
 	return status;
 }
 
@@ -2054,6 +2065,13 @@
 	}
 
 	while (wr) {
+		if (qp->qp_type == IB_QPT_UD &&
+		    (wr->opcode != IB_WR_SEND &&
+		     wr->opcode != IB_WR_SEND_WITH_IMM)) {
+			*bad_wr = wr;
+			status = -EINVAL;
+			break;
+		}
 		if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
 		    wr->num_sge > qp->sq.max_sges) {
 			*bad_wr = wr;
@@ -2488,6 +2506,11 @@
 			*stop = true;
 			expand = false;
 		}
+	} else if (is_hw_sq_empty(qp)) {
+		/* Do nothing */
+		expand = false;
+		*polled = false;
+		*stop = false;
 	} else {
 		*polled = true;
 		expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
@@ -2593,6 +2616,11 @@
 			*stop = true;
 			expand = false;
 		}
+	} else if (is_hw_rq_empty(qp)) {
+		/* Do nothing */
+		expand = false;
+		*polled = false;
+		*stop = false;
 	} else {
 		*polled = true;
 		expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
diff --git a/drivers/infiniband/hw/qib/qib_mad.c b/drivers/infiniband/hw/qib/qib_mad.c
index 22c720e..636be11 100644
--- a/drivers/infiniband/hw/qib/qib_mad.c
+++ b/drivers/infiniband/hw/qib/qib_mad.c
@@ -2476,7 +2476,7 @@
 		ibp = &dd->pport[p].ibport_data;
 		agent = ib_register_mad_agent(&dev->ibdev, p + 1, IB_QPT_SMI,
 					      NULL, 0, send_handler,
-					      NULL, NULL);
+					      NULL, NULL, 0);
 		if (IS_ERR(agent)) {
 			ret = PTR_ERR(agent);
 			goto err;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index c639f90..3edce61 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -86,7 +86,6 @@
 	IPOIB_FLAG_INITIALIZED	  = 1,
 	IPOIB_FLAG_ADMIN_UP	  = 2,
 	IPOIB_PKEY_ASSIGNED	  = 3,
-	IPOIB_PKEY_STOP		  = 4,
 	IPOIB_FLAG_SUBINTERFACE	  = 5,
 	IPOIB_MCAST_RUN		  = 6,
 	IPOIB_STOP_REAPER	  = 7,
@@ -312,7 +311,6 @@
 	struct list_head multicast_list;
 	struct rb_root multicast_tree;
 
-	struct delayed_work pkey_poll_task;
 	struct delayed_work mcast_task;
 	struct work_struct carrier_on_task;
 	struct work_struct flush_light;
@@ -473,10 +471,11 @@
 void ipoib_pkey_event(struct work_struct *work);
 void ipoib_ib_dev_cleanup(struct net_device *dev);
 
-int ipoib_ib_dev_open(struct net_device *dev);
+int ipoib_ib_dev_open(struct net_device *dev, int flush);
 int ipoib_ib_dev_up(struct net_device *dev);
 int ipoib_ib_dev_down(struct net_device *dev, int flush);
 int ipoib_ib_dev_stop(struct net_device *dev, int flush);
+void ipoib_pkey_dev_check_presence(struct net_device *dev);
 
 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
 void ipoib_dev_cleanup(struct net_device *dev);
@@ -532,8 +531,7 @@
 
 void ipoib_setup(struct net_device *dev);
 
-void ipoib_pkey_poll(struct work_struct *work);
-int ipoib_pkey_dev_delay_open(struct net_device *dev);
+void ipoib_pkey_open(struct ipoib_dev_priv *priv);
 void ipoib_drain_cq(struct net_device *dev);
 
 void ipoib_set_ethtool_ops(struct net_device *dev);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_fs.c b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
index 5006185..6bd5740 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_fs.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
@@ -281,10 +281,8 @@
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 
-	if (priv->mcg_dentry)
-		debugfs_remove(priv->mcg_dentry);
-	if (priv->path_dentry)
-		debugfs_remove(priv->path_dentry);
+	debugfs_remove(priv->mcg_dentry);
+	debugfs_remove(priv->path_dentry);
 }
 
 int ipoib_register_debugfs(void)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 6a7003d..72626c34 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -664,17 +664,18 @@
 	drain_tx_cq((struct net_device *)ctx);
 }
 
-int ipoib_ib_dev_open(struct net_device *dev)
+int ipoib_ib_dev_open(struct net_device *dev, int flush)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	int ret;
 
-	if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
-		ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
-		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+	ipoib_pkey_dev_check_presence(dev);
+
+	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
+		ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
+			   (!(priv->pkey & 0x7fff) ? "Invalid" : "not found"));
 		return -1;
 	}
-	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 
 	ret = ipoib_init_qp(dev);
 	if (ret) {
@@ -705,16 +706,17 @@
 dev_stop:
 	if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 		napi_enable(&priv->napi);
-	ipoib_ib_dev_stop(dev, 1);
+	ipoib_ib_dev_stop(dev, flush);
 	return -1;
 }
 
-static void ipoib_pkey_dev_check_presence(struct net_device *dev)
+void ipoib_pkey_dev_check_presence(struct net_device *dev)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
-	u16 pkey_index = 0;
 
-	if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
+	if (!(priv->pkey & 0x7fff) ||
+	    ib_find_pkey(priv->ca, priv->port, priv->pkey,
+			 &priv->pkey_index))
 		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 	else
 		set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
@@ -745,14 +747,6 @@
 	clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 	netif_carrier_off(dev);
 
-	/* Shutdown the P_Key thread if still active */
-	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
-		mutex_lock(&pkey_mutex);
-		set_bit(IPOIB_PKEY_STOP, &priv->flags);
-		cancel_delayed_work_sync(&priv->pkey_poll_task);
-		mutex_unlock(&pkey_mutex);
-	}
-
 	ipoib_mcast_stop_thread(dev, flush);
 	ipoib_mcast_dev_flush(dev);
 
@@ -924,7 +918,7 @@
 		    (unsigned long) dev);
 
 	if (dev->flags & IFF_UP) {
-		if (ipoib_ib_dev_open(dev)) {
+		if (ipoib_ib_dev_open(dev, 1)) {
 			ipoib_transport_dev_cleanup(dev);
 			return -ENODEV;
 		}
@@ -966,13 +960,27 @@
 
 	return 1;
 }
+/*
+ * returns 0 if pkey value was found in a different slot.
+ */
+static inline int update_child_pkey(struct ipoib_dev_priv *priv)
+{
+	u16 old_index = priv->pkey_index;
+
+	priv->pkey_index = 0;
+	ipoib_pkey_dev_check_presence(priv->dev);
+
+	if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
+	    (old_index == priv->pkey_index))
+		return 1;
+	return 0;
+}
 
 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
 				enum ipoib_flush_level level)
 {
 	struct ipoib_dev_priv *cpriv;
 	struct net_device *dev = priv->dev;
-	u16 new_index;
 	int result;
 
 	down_read(&priv->vlan_rwsem);
@@ -986,16 +994,20 @@
 
 	up_read(&priv->vlan_rwsem);
 
-	if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
-		/* for non-child devices must check/update the pkey value here */
-		if (level == IPOIB_FLUSH_HEAVY &&
-		    !test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
-			update_parent_pkey(priv);
+	if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
+	    level != IPOIB_FLUSH_HEAVY) {
 		ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
 		return;
 	}
 
 	if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
+		/* interface is down. update pkey and leave. */
+		if (level == IPOIB_FLUSH_HEAVY) {
+			if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
+				update_parent_pkey(priv);
+			else
+				update_child_pkey(priv);
+		}
 		ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
 		return;
 	}
@@ -1005,20 +1017,13 @@
 		 * (parent) devices should always takes what present in pkey index 0
 		 */
 		if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
-			if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
-				clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
-				ipoib_ib_dev_down(dev, 0);
-				ipoib_ib_dev_stop(dev, 0);
-				if (ipoib_pkey_dev_delay_open(dev))
-					return;
-			}
-			/* restart QP only if P_Key index is changed */
-			if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
-			    new_index == priv->pkey_index) {
+			result = update_child_pkey(priv);
+			if (result) {
+				/* restart QP only if P_Key index is changed */
 				ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
 				return;
 			}
-			priv->pkey_index = new_index;
+
 		} else {
 			result = update_parent_pkey(priv);
 			/* restart QP only if P_Key value changed */
@@ -1038,8 +1043,12 @@
 		ipoib_ib_dev_down(dev, 0);
 
 	if (level == IPOIB_FLUSH_HEAVY) {
-		ipoib_ib_dev_stop(dev, 0);
-		ipoib_ib_dev_open(dev);
+		if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
+			ipoib_ib_dev_stop(dev, 0);
+		if (ipoib_ib_dev_open(dev, 0) != 0)
+			return;
+		if (netif_queue_stopped(dev))
+			netif_start_queue(dev);
 	}
 
 	/*
@@ -1094,54 +1103,4 @@
 	ipoib_transport_dev_cleanup(dev);
 }
 
-/*
- * Delayed P_Key Assigment Interim Support
- *
- * The following is initial implementation of delayed P_Key assigment
- * mechanism. It is using the same approach implemented for the multicast
- * group join. The single goal of this implementation is to quickly address
- * Bug #2507. This implementation will probably be removed when the P_Key
- * change async notification is available.
- */
 
-void ipoib_pkey_poll(struct work_struct *work)
-{
-	struct ipoib_dev_priv *priv =
-		container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
-	struct net_device *dev = priv->dev;
-
-	ipoib_pkey_dev_check_presence(dev);
-
-	if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
-		ipoib_open(dev);
-	else {
-		mutex_lock(&pkey_mutex);
-		if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
-			queue_delayed_work(ipoib_workqueue,
-					   &priv->pkey_poll_task,
-					   HZ);
-		mutex_unlock(&pkey_mutex);
-	}
-}
-
-int ipoib_pkey_dev_delay_open(struct net_device *dev)
-{
-	struct ipoib_dev_priv *priv = netdev_priv(dev);
-
-	/* Look for the interface pkey value in the IB Port P_Key table and */
-	/* set the interface pkey assigment flag                            */
-	ipoib_pkey_dev_check_presence(dev);
-
-	/* P_Key value not assigned yet - start polling */
-	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
-		mutex_lock(&pkey_mutex);
-		clear_bit(IPOIB_PKEY_STOP, &priv->flags);
-		queue_delayed_work(ipoib_workqueue,
-				   &priv->pkey_poll_task,
-				   HZ);
-		mutex_unlock(&pkey_mutex);
-		return 1;
-	}
-
-	return 0;
-}
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 4e675f4..1310acf 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -108,11 +108,11 @@
 
 	set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 
-	if (ipoib_pkey_dev_delay_open(dev))
-		return 0;
-
-	if (ipoib_ib_dev_open(dev))
+	if (ipoib_ib_dev_open(dev, 1)) {
+		if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
+			return 0;
 		goto err_disable;
+	}
 
 	if (ipoib_ib_dev_up(dev))
 		goto err_stop;
@@ -1379,7 +1379,6 @@
 	INIT_LIST_HEAD(&priv->dead_ahs);
 	INIT_LIST_HEAD(&priv->multicast_list);
 
-	INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
 	INIT_DELAYED_WORK(&priv->mcast_task,   ipoib_mcast_join_task);
 	INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
 	INIT_WORK(&priv->flush_light,   ipoib_ib_dev_flush_light);
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index eb79739..61ee91d 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -596,20 +596,28 @@
 	struct iser_conn *ib_conn;
 	struct iscsi_endpoint *ep;
 
-	ep = iscsi_create_endpoint(sizeof(*ib_conn));
+	ep = iscsi_create_endpoint(0);
 	if (!ep)
 		return ERR_PTR(-ENOMEM);
 
-	ib_conn = ep->dd_data;
+	ib_conn = kzalloc(sizeof(*ib_conn), GFP_KERNEL);
+	if (!ib_conn) {
+		err = -ENOMEM;
+		goto failure;
+	}
+
+	ep->dd_data = ib_conn;
 	ib_conn->ep = ep;
 	iser_conn_init(ib_conn);
 
-	err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr,
-			   non_blocking);
+	err = iser_connect(ib_conn, NULL, dst_addr, non_blocking);
 	if (err)
-		return ERR_PTR(err);
+		goto failure;
 
 	return ep;
+failure:
+	iscsi_destroy_endpoint(ep);
+	return ERR_PTR(err);
 }
 
 static int
@@ -619,15 +627,16 @@
 	int rc;
 
 	ib_conn = ep->dd_data;
-	rc = wait_event_interruptible_timeout(ib_conn->wait,
-			     ib_conn->state == ISER_CONN_UP,
-			     msecs_to_jiffies(timeout_ms));
-
+	rc = wait_for_completion_interruptible_timeout(&ib_conn->up_completion,
+						       msecs_to_jiffies(timeout_ms));
 	/* if conn establishment failed, return error code to iscsi */
-	if (!rc &&
-	    (ib_conn->state == ISER_CONN_TERMINATING ||
-	     ib_conn->state == ISER_CONN_DOWN))
-		rc = -1;
+	if (rc == 0) {
+		mutex_lock(&ib_conn->state_mutex);
+		if (ib_conn->state == ISER_CONN_TERMINATING ||
+		    ib_conn->state == ISER_CONN_DOWN)
+			rc = -1;
+		mutex_unlock(&ib_conn->state_mutex);
+	}
 
 	iser_info("ib conn %p rc = %d\n", ib_conn, rc);
 
@@ -646,19 +655,25 @@
 
 	ib_conn = ep->dd_data;
 	iser_info("ep %p ib conn %p state %d\n", ep, ib_conn, ib_conn->state);
+	mutex_lock(&ib_conn->state_mutex);
 	iser_conn_terminate(ib_conn);
 
 	/*
-	 * if iser_conn and iscsi_conn are bound, we must wait iscsi_conn_stop
-	 * call and ISER_CONN_DOWN state before freeing the iser resources.
-	 * otherwise we are safe to free resources immediately.
+	 * if iser_conn and iscsi_conn are bound, we must wait for
+	 * iscsi_conn_stop and flush errors completion before freeing
+	 * the iser resources. Otherwise we are safe to free resources
+	 * immediately.
 	 */
 	if (ib_conn->iscsi_conn) {
 		INIT_WORK(&ib_conn->release_work, iser_release_work);
 		queue_work(release_wq, &ib_conn->release_work);
+		mutex_unlock(&ib_conn->state_mutex);
 	} else {
+		ib_conn->state = ISER_CONN_DOWN;
+		mutex_unlock(&ib_conn->state_mutex);
 		iser_conn_release(ib_conn);
 	}
+	iscsi_destroy_endpoint(ep);
 }
 
 static umode_t iser_attr_is_visible(int param_type, int param)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 97cd385..c877dad 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -326,7 +326,6 @@
 	struct iser_device           *device;       /* device context          */
 	struct rdma_cm_id            *cma_id;       /* CMA ID		       */
 	struct ib_qp	             *qp;           /* QP 		       */
-	wait_queue_head_t	     wait;          /* waitq for conn/disconn  */
 	unsigned		     qp_max_recv_dtos; /* num of rx buffers */
 	unsigned		     qp_max_recv_dtos_mask; /* above minus 1 */
 	unsigned		     min_posted_rx; /* qp_max_recv_dtos >> 2 */
@@ -335,6 +334,9 @@
 	char 			     name[ISER_OBJECT_NAME_SIZE];
 	struct work_struct	     release_work;
 	struct completion	     stop_completion;
+	struct mutex		     state_mutex;
+	struct completion	     flush_completion;
+	struct completion	     up_completion;
 	struct list_head	     conn_list;       /* entry in ig conn list */
 
 	char  			     *login_buf;
@@ -448,8 +450,8 @@
 			       enum iser_data_dir cmd_dir);
 
 int  iser_connect(struct iser_conn   *ib_conn,
-		  struct sockaddr_in *src_addr,
-		  struct sockaddr_in *dst_addr,
+		  struct sockaddr    *src_addr,
+		  struct sockaddr    *dst_addr,
 		  int                non_blocking);
 
 int  iser_reg_page_vec(struct iser_conn     *ib_conn,
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index ea01075..3ef167f 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -491,10 +491,9 @@
 }
 
 /**
- * releases the QP objects, returns 0 on success,
- * -1 on failure
+ * releases the QP object
  */
-static int iser_free_ib_conn_res(struct iser_conn *ib_conn)
+static void iser_free_ib_conn_res(struct iser_conn *ib_conn)
 {
 	int cq_index;
 	BUG_ON(ib_conn == NULL);
@@ -513,8 +512,6 @@
 	}
 
 	ib_conn->qp	  = NULL;
-
-	return 0;
 }
 
 /**
@@ -568,31 +565,40 @@
 	mutex_unlock(&ig.device_list_mutex);
 }
 
+/**
+ * Called with state mutex held
+ **/
 static int iser_conn_state_comp_exch(struct iser_conn *ib_conn,
 				     enum iser_ib_conn_state comp,
 				     enum iser_ib_conn_state exch)
 {
 	int ret;
 
-	spin_lock_bh(&ib_conn->lock);
 	if ((ret = (ib_conn->state == comp)))
 		ib_conn->state = exch;
-	spin_unlock_bh(&ib_conn->lock);
 	return ret;
 }
 
 void iser_release_work(struct work_struct *work)
 {
 	struct iser_conn *ib_conn;
+	int rc;
 
 	ib_conn = container_of(work, struct iser_conn, release_work);
 
 	/* wait for .conn_stop callback */
-	wait_for_completion(&ib_conn->stop_completion);
+	rc = wait_for_completion_timeout(&ib_conn->stop_completion, 30 * HZ);
+	WARN_ON(rc == 0);
 
 	/* wait for the qp`s post send and post receive buffers to empty */
-	wait_event_interruptible(ib_conn->wait,
-				 ib_conn->state == ISER_CONN_DOWN);
+	rc = wait_for_completion_timeout(&ib_conn->flush_completion, 30 * HZ);
+	WARN_ON(rc == 0);
+
+	ib_conn->state = ISER_CONN_DOWN;
+
+	mutex_lock(&ib_conn->state_mutex);
+	ib_conn->state = ISER_CONN_DOWN;
+	mutex_unlock(&ib_conn->state_mutex);
 
 	iser_conn_release(ib_conn);
 }
@@ -604,23 +610,27 @@
 {
 	struct iser_device  *device = ib_conn->device;
 
-	BUG_ON(ib_conn->state == ISER_CONN_UP);
-
 	mutex_lock(&ig.connlist_mutex);
 	list_del(&ib_conn->conn_list);
 	mutex_unlock(&ig.connlist_mutex);
+
+	mutex_lock(&ib_conn->state_mutex);
+	BUG_ON(ib_conn->state != ISER_CONN_DOWN);
+
 	iser_free_rx_descriptors(ib_conn);
 	iser_free_ib_conn_res(ib_conn);
 	ib_conn->device = NULL;
 	/* on EVENT_ADDR_ERROR there's no device yet for this conn */
 	if (device != NULL)
 		iser_device_try_release(device);
+	mutex_unlock(&ib_conn->state_mutex);
+
 	/* if cma handler context, the caller actually destroy the id */
 	if (ib_conn->cma_id != NULL) {
 		rdma_destroy_id(ib_conn->cma_id);
 		ib_conn->cma_id = NULL;
 	}
-	iscsi_destroy_endpoint(ib_conn->ep);
+	kfree(ib_conn);
 }
 
 /**
@@ -642,22 +652,31 @@
 			 ib_conn,err);
 }
 
+/**
+ * Called with state mutex held
+ **/
 static void iser_connect_error(struct rdma_cm_id *cma_id)
 {
 	struct iser_conn *ib_conn;
 
 	ib_conn = (struct iser_conn *)cma_id->context;
-
 	ib_conn->state = ISER_CONN_DOWN;
-	wake_up_interruptible(&ib_conn->wait);
 }
 
+/**
+ * Called with state mutex held
+ **/
 static void iser_addr_handler(struct rdma_cm_id *cma_id)
 {
 	struct iser_device *device;
 	struct iser_conn   *ib_conn;
 	int    ret;
 
+	ib_conn = (struct iser_conn *)cma_id->context;
+	if (ib_conn->state != ISER_CONN_PENDING)
+		/* bailout */
+		return;
+
 	device = iser_device_find_by_ib_device(cma_id);
 	if (!device) {
 		iser_err("device lookup/creation failed\n");
@@ -665,7 +684,6 @@
 		return;
 	}
 
-	ib_conn = (struct iser_conn *)cma_id->context;
 	ib_conn->device = device;
 
 	/* connection T10-PI support */
@@ -689,18 +707,27 @@
 	}
 }
 
+/**
+ * Called with state mutex held
+ **/
 static void iser_route_handler(struct rdma_cm_id *cma_id)
 {
 	struct rdma_conn_param conn_param;
 	int    ret;
 	struct iser_cm_hdr req_hdr;
+	struct iser_conn *ib_conn = (struct iser_conn *)cma_id->context;
+	struct iser_device *device = ib_conn->device;
+
+	if (ib_conn->state != ISER_CONN_PENDING)
+		/* bailout */
+		return;
 
 	ret = iser_create_ib_conn_res((struct iser_conn *)cma_id->context);
 	if (ret)
 		goto failure;
 
 	memset(&conn_param, 0, sizeof conn_param);
-	conn_param.responder_resources = 4;
+	conn_param.responder_resources = device->dev_attr.max_qp_rd_atom;
 	conn_param.initiator_depth     = 1;
 	conn_param.retry_count	       = 7;
 	conn_param.rnr_retry_count     = 6;
@@ -728,12 +755,16 @@
 	struct ib_qp_attr attr;
 	struct ib_qp_init_attr init_attr;
 
+	ib_conn = (struct iser_conn *)cma_id->context;
+	if (ib_conn->state != ISER_CONN_PENDING)
+		/* bailout */
+		return;
+
 	(void)ib_query_qp(cma_id->qp, &attr, ~0, &init_attr);
 	iser_info("remote qpn:%x my qpn:%x\n", attr.dest_qp_num, cma_id->qp->qp_num);
 
-	ib_conn = (struct iser_conn *)cma_id->context;
-	if (iser_conn_state_comp_exch(ib_conn, ISER_CONN_PENDING, ISER_CONN_UP))
-		wake_up_interruptible(&ib_conn->wait);
+	ib_conn->state = ISER_CONN_UP;
+	complete(&ib_conn->up_completion);
 }
 
 static void iser_disconnected_handler(struct rdma_cm_id *cma_id)
@@ -752,19 +783,25 @@
 			iser_err("iscsi_iser connection isn't bound\n");
 	}
 
-	/* Complete the termination process if no posts are pending */
+	/* Complete the termination process if no posts are pending. This code
+	 * block also exists in iser_handle_comp_error(), but it is needed here
+	 * for cases of no flushes at all, e.g. discovery over rdma.
+	 */
 	if (ib_conn->post_recv_buf_count == 0 &&
 	    (atomic_read(&ib_conn->post_send_buf_count) == 0)) {
-		ib_conn->state = ISER_CONN_DOWN;
-		wake_up_interruptible(&ib_conn->wait);
+		complete(&ib_conn->flush_completion);
 	}
 }
 
 static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 {
+	struct iser_conn *ib_conn;
+
+	ib_conn = (struct iser_conn *)cma_id->context;
 	iser_info("event %d status %d conn %p id %p\n",
 		  event->event, event->status, cma_id->context, cma_id);
 
+	mutex_lock(&ib_conn->state_mutex);
 	switch (event->event) {
 	case RDMA_CM_EVENT_ADDR_RESOLVED:
 		iser_addr_handler(cma_id);
@@ -785,24 +822,28 @@
 	case RDMA_CM_EVENT_DISCONNECTED:
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 	case RDMA_CM_EVENT_ADDR_CHANGE:
+	case RDMA_CM_EVENT_TIMEWAIT_EXIT:
 		iser_disconnected_handler(cma_id);
 		break;
 	default:
 		iser_err("Unexpected RDMA CM event (%d)\n", event->event);
 		break;
 	}
+	mutex_unlock(&ib_conn->state_mutex);
 	return 0;
 }
 
 void iser_conn_init(struct iser_conn *ib_conn)
 {
 	ib_conn->state = ISER_CONN_INIT;
-	init_waitqueue_head(&ib_conn->wait);
 	ib_conn->post_recv_buf_count = 0;
 	atomic_set(&ib_conn->post_send_buf_count, 0);
 	init_completion(&ib_conn->stop_completion);
+	init_completion(&ib_conn->flush_completion);
+	init_completion(&ib_conn->up_completion);
 	INIT_LIST_HEAD(&ib_conn->conn_list);
 	spin_lock_init(&ib_conn->lock);
+	mutex_init(&ib_conn->state_mutex);
 }
 
  /**
@@ -810,22 +851,21 @@
  * sleeps until the connection is established or rejected
  */
 int iser_connect(struct iser_conn   *ib_conn,
-		 struct sockaddr_in *src_addr,
-		 struct sockaddr_in *dst_addr,
+		 struct sockaddr    *src_addr,
+		 struct sockaddr    *dst_addr,
 		 int                 non_blocking)
 {
-	struct sockaddr *src, *dst;
 	int err = 0;
 
-	sprintf(ib_conn->name, "%pI4:%d",
-		&dst_addr->sin_addr.s_addr, dst_addr->sin_port);
+	mutex_lock(&ib_conn->state_mutex);
+
+	sprintf(ib_conn->name, "%pISp", dst_addr);
+
+	iser_info("connecting to: %s\n", ib_conn->name);
 
 	/* the device is known only --after-- address resolution */
 	ib_conn->device = NULL;
 
-	iser_info("connecting to: %pI4, port 0x%x\n",
-		  &dst_addr->sin_addr, dst_addr->sin_port);
-
 	ib_conn->state = ISER_CONN_PENDING;
 
 	ib_conn->cma_id = rdma_create_id(iser_cma_handler,
@@ -837,23 +877,21 @@
 		goto id_failure;
 	}
 
-	src = (struct sockaddr *)src_addr;
-	dst = (struct sockaddr *)dst_addr;
-	err = rdma_resolve_addr(ib_conn->cma_id, src, dst, 1000);
+	err = rdma_resolve_addr(ib_conn->cma_id, src_addr, dst_addr, 1000);
 	if (err) {
 		iser_err("rdma_resolve_addr failed: %d\n", err);
 		goto addr_failure;
 	}
 
 	if (!non_blocking) {
-		wait_event_interruptible(ib_conn->wait,
-					 (ib_conn->state != ISER_CONN_PENDING));
+		wait_for_completion_interruptible(&ib_conn->up_completion);
 
 		if (ib_conn->state != ISER_CONN_UP) {
 			err =  -EIO;
 			goto connect_failure;
 		}
 	}
+	mutex_unlock(&ib_conn->state_mutex);
 
 	mutex_lock(&ig.connlist_mutex);
 	list_add(&ib_conn->conn_list, &ig.connlist);
@@ -865,6 +903,7 @@
 addr_failure:
 	ib_conn->state = ISER_CONN_DOWN;
 connect_failure:
+	mutex_unlock(&ib_conn->state_mutex);
 	iser_conn_release(ib_conn);
 	return err;
 }
@@ -1049,18 +1088,19 @@
 
 	if (ib_conn->post_recv_buf_count == 0 &&
 	    atomic_read(&ib_conn->post_send_buf_count) == 0) {
-		/* getting here when the state is UP means that the conn is *
-		 * being terminated asynchronously from the iSCSI layer's   *
-		 * perspective.                                             */
-		if (iser_conn_state_comp_exch(ib_conn, ISER_CONN_UP,
-		    ISER_CONN_TERMINATING))
+		/**
+		 * getting here when the state is UP means that the conn is
+		 * being terminated asynchronously from the iSCSI layer's
+		 * perspective. It is safe to peek at the connection state
+		 * since iscsi_conn_failure is allowed to be called twice.
+		 **/
+		if (ib_conn->state == ISER_CONN_UP)
 			iscsi_conn_failure(ib_conn->iscsi_conn,
 					   ISCSI_ERR_CONN_FAILED);
 
 		/* no more non completed posts to the QP, complete the
 		 * termination process w.o worrying on disconnect event */
-		ib_conn->state = ISER_CONN_DOWN;
-		wake_up_interruptible(&ib_conn->wait);
+		complete(&ib_conn->flush_completion);
 	}
 }
 
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index e3c2c5b..62d2a18 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -130,6 +130,7 @@
 static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event);
 
 static struct scsi_transport_template *ib_srp_transport_template;
+static struct workqueue_struct *srp_remove_wq;
 
 static struct ib_client srp_client = {
 	.name   = "srp",
@@ -731,7 +732,7 @@
 	spin_unlock_irq(&target->lock);
 
 	if (changed)
-		queue_work(system_long_wq, &target->remove_work);
+		queue_work(srp_remove_wq, &target->remove_work);
 
 	return changed;
 }
@@ -1643,10 +1644,14 @@
 				     SCSI_SENSE_BUFFERSIZE));
 		}
 
-		if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER))
-			scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt));
-		else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER))
+		if (unlikely(rsp->flags & SRP_RSP_FLAG_DIUNDER))
 			scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt));
+		else if (unlikely(rsp->flags & SRP_RSP_FLAG_DIOVER))
+			scsi_set_resid(scmnd, -be32_to_cpu(rsp->data_in_res_cnt));
+		else if (unlikely(rsp->flags & SRP_RSP_FLAG_DOUNDER))
+			scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt));
+		else if (unlikely(rsp->flags & SRP_RSP_FLAG_DOOVER))
+			scsi_set_resid(scmnd, -be32_to_cpu(rsp->data_out_res_cnt));
 
 		srp_free_req(target, req, scmnd,
 			     be32_to_cpu(rsp->req_lim_delta));
@@ -3261,9 +3266,10 @@
 		spin_unlock(&host->target_lock);
 
 		/*
-		 * Wait for target port removal tasks.
+		 * Wait for tl_err and target port removal tasks.
 		 */
 		flush_workqueue(system_long_wq);
+		flush_workqueue(srp_remove_wq);
 
 		kfree(host);
 	}
@@ -3313,16 +3319,22 @@
 		indirect_sg_entries = cmd_sg_entries;
 	}
 
+	srp_remove_wq = create_workqueue("srp_remove");
+	if (!srp_remove_wq) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	ret = -ENOMEM;
 	ib_srp_transport_template =
 		srp_attach_transport(&ib_srp_transport_functions);
 	if (!ib_srp_transport_template)
-		return -ENOMEM;
+		goto destroy_wq;
 
 	ret = class_register(&srp_class);
 	if (ret) {
 		pr_err("couldn't register class infiniband_srp\n");
-		srp_release_transport(ib_srp_transport_template);
-		return ret;
+		goto release_tr;
 	}
 
 	ib_sa_register_client(&srp_sa_client);
@@ -3330,13 +3342,22 @@
 	ret = ib_register_client(&srp_client);
 	if (ret) {
 		pr_err("couldn't register IB client\n");
-		srp_release_transport(ib_srp_transport_template);
-		ib_sa_unregister_client(&srp_sa_client);
-		class_unregister(&srp_class);
-		return ret;
+		goto unreg_sa;
 	}
 
-	return 0;
+out:
+	return ret;
+
+unreg_sa:
+	ib_sa_unregister_client(&srp_sa_client);
+	class_unregister(&srp_class);
+
+release_tr:
+	srp_release_transport(ib_srp_transport_template);
+
+destroy_wq:
+	destroy_workqueue(srp_remove_wq);
+	goto out;
 }
 
 static void __exit srp_cleanup_module(void)
@@ -3345,6 +3366,7 @@
 	ib_sa_unregister_client(&srp_sa_client);
 	class_unregister(&srp_class);
 	srp_release_transport(ib_srp_transport_template);
+	destroy_workqueue(srp_remove_wq);
 }
 
 module_init(srp_init_module);
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index fe09f27..d28a8c2 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -198,6 +198,7 @@
 	case IB_EVENT_PKEY_CHANGE:
 	case IB_EVENT_SM_CHANGE:
 	case IB_EVENT_CLIENT_REREGISTER:
+	case IB_EVENT_GID_CHANGE:
 		/* Refresh port data asynchronously. */
 		if (event->element.port_num <= sdev->device->phys_port_cnt) {
 			sport = &sdev->port[event->element.port_num - 1];
@@ -563,7 +564,7 @@
 							 &reg_req, 0,
 							 srpt_mad_send_handler,
 							 srpt_mad_recv_handler,
-							 sport);
+							 sport, 0);
 		if (IS_ERR(sport->mad_agent)) {
 			ret = PTR_ERR(sport->mad_agent);
 			sport->mad_agent = NULL;
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index 443d03f..8eeab72 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -331,7 +331,7 @@
 				mutex_unlock(&ca->set->bucket_lock);
 				blkdev_issue_discard(ca->bdev,
 					bucket_to_sector(ca->set, bucket),
-					ca->sb.block_size, GFP_KERNEL, 0);
+					ca->sb.bucket_size, GFP_KERNEL, 0);
 				mutex_lock(&ca->set->bucket_lock);
 			}
 
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index d2ebcf3..04f7bc2 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -477,9 +477,13 @@
  * CACHE_SET_STOPPING always gets set first when we're closing down a cache set;
  * we'll continue to run normally for awhile with CACHE_SET_STOPPING set (i.e.
  * flushing dirty data).
+ *
+ * CACHE_SET_RUNNING means all cache devices have been registered and journal
+ * replay is complete.
  */
 #define CACHE_SET_UNREGISTERING		0
 #define	CACHE_SET_STOPPING		1
+#define	CACHE_SET_RUNNING		2
 
 struct cache_set {
 	struct closure		cl;
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 5454164..646fe85 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -1182,7 +1182,7 @@
 {
 	uint64_t start_time;
 	bool used_mempool = false;
-	struct bset *out = (void *) __get_free_pages(__GFP_NOWARN|GFP_NOIO,
+	struct bset *out = (void *) __get_free_pages(__GFP_NOWARN|GFP_NOWAIT,
 						     order);
 	if (!out) {
 		struct page *outp;
diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
index 5f6728d..ae96462 100644
--- a/drivers/md/bcache/bset.h
+++ b/drivers/md/bcache/bset.h
@@ -453,7 +453,7 @@
 {
 	return (KEY_DIRTY(l) == KEY_DIRTY(r) &&
 		KEY_PTRS(l) == KEY_PTRS(r) &&
-		KEY_CSUM(l) == KEY_CSUM(l));
+		KEY_CSUM(l) == KEY_CSUM(r));
 }
 
 /* Keylists */
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 7347b61..00cde40 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -117,9 +117,9 @@
 ({									\
 	int _r, l = (b)->level - 1;					\
 	bool _w = l <= (op)->lock;					\
-	struct btree *_child = bch_btree_node_get((b)->c, op, key, l, _w);\
+	struct btree *_child = bch_btree_node_get((b)->c, op, key, l,	\
+						  _w, b);		\
 	if (!IS_ERR(_child)) {						\
-		_child->parent = (b);					\
 		_r = bch_btree_ ## fn(_child, op, ##__VA_ARGS__);	\
 		rw_unlock(_w, _child);					\
 	} else								\
@@ -142,7 +142,6 @@
 		rw_lock(_w, _b, _b->level);				\
 		if (_b == (c)->root &&					\
 		    _w == insert_lock(op, _b)) {			\
-			_b->parent = NULL;				\
 			_r = bch_btree_ ## fn(_b, op, ##__VA_ARGS__);	\
 		}							\
 		rw_unlock(_w, _b);					\
@@ -202,7 +201,7 @@
 	struct bset *i = btree_bset_first(b);
 	struct btree_iter *iter;
 
-	iter = mempool_alloc(b->c->fill_iter, GFP_NOWAIT);
+	iter = mempool_alloc(b->c->fill_iter, GFP_NOIO);
 	iter->size = b->c->sb.bucket_size / b->c->sb.block_size;
 	iter->used = 0;
 
@@ -421,7 +420,7 @@
 	SET_PTR_OFFSET(&k.key, 0, PTR_OFFSET(&k.key, 0) +
 		       bset_sector_offset(&b->keys, i));
 
-	if (!bio_alloc_pages(b->bio, GFP_NOIO)) {
+	if (!bio_alloc_pages(b->bio, __GFP_NOWARN|GFP_NOWAIT)) {
 		int j;
 		struct bio_vec *bv;
 		void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1));
@@ -967,7 +966,8 @@
  * level and op->lock.
  */
 struct btree *bch_btree_node_get(struct cache_set *c, struct btree_op *op,
-				 struct bkey *k, int level, bool write)
+				 struct bkey *k, int level, bool write,
+				 struct btree *parent)
 {
 	int i = 0;
 	struct btree *b;
@@ -1002,6 +1002,7 @@
 		BUG_ON(b->level != level);
 	}
 
+	b->parent = parent;
 	b->accessed = 1;
 
 	for (; i <= b->keys.nsets && b->keys.set[i].size; i++) {
@@ -1022,15 +1023,16 @@
 	return b;
 }
 
-static void btree_node_prefetch(struct cache_set *c, struct bkey *k, int level)
+static void btree_node_prefetch(struct btree *parent, struct bkey *k)
 {
 	struct btree *b;
 
-	mutex_lock(&c->bucket_lock);
-	b = mca_alloc(c, NULL, k, level);
-	mutex_unlock(&c->bucket_lock);
+	mutex_lock(&parent->c->bucket_lock);
+	b = mca_alloc(parent->c, NULL, k, parent->level - 1);
+	mutex_unlock(&parent->c->bucket_lock);
 
 	if (!IS_ERR_OR_NULL(b)) {
+		b->parent = parent;
 		bch_btree_node_read(b);
 		rw_unlock(true, b);
 	}
@@ -1060,15 +1062,16 @@
 	mutex_unlock(&b->c->bucket_lock);
 }
 
-struct btree *bch_btree_node_alloc(struct cache_set *c, struct btree_op *op,
-				   int level)
+struct btree *__bch_btree_node_alloc(struct cache_set *c, struct btree_op *op,
+				     int level, bool wait,
+				     struct btree *parent)
 {
 	BKEY_PADDED(key) k;
 	struct btree *b = ERR_PTR(-EAGAIN);
 
 	mutex_lock(&c->bucket_lock);
 retry:
-	if (__bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, 1, op != NULL))
+	if (__bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, 1, wait))
 		goto err;
 
 	bkey_put(c, &k.key);
@@ -1085,6 +1088,7 @@
 	}
 
 	b->accessed = 1;
+	b->parent = parent;
 	bch_bset_init_next(&b->keys, b->keys.set->data, bset_magic(&b->c->sb));
 
 	mutex_unlock(&c->bucket_lock);
@@ -1096,14 +1100,21 @@
 err:
 	mutex_unlock(&c->bucket_lock);
 
-	trace_bcache_btree_node_alloc_fail(b);
+	trace_bcache_btree_node_alloc_fail(c);
 	return b;
 }
 
+static struct btree *bch_btree_node_alloc(struct cache_set *c,
+					  struct btree_op *op, int level,
+					  struct btree *parent)
+{
+	return __bch_btree_node_alloc(c, op, level, op != NULL, parent);
+}
+
 static struct btree *btree_node_alloc_replacement(struct btree *b,
 						  struct btree_op *op)
 {
-	struct btree *n = bch_btree_node_alloc(b->c, op, b->level);
+	struct btree *n = bch_btree_node_alloc(b->c, op, b->level, b->parent);
 	if (!IS_ERR_OR_NULL(n)) {
 		mutex_lock(&n->write_lock);
 		bch_btree_sort_into(&b->keys, &n->keys, &b->c->sort);
@@ -1403,6 +1414,7 @@
 	BUG_ON(btree_bset_first(new_nodes[0])->keys);
 	btree_node_free(new_nodes[0]);
 	rw_unlock(true, new_nodes[0]);
+	new_nodes[0] = NULL;
 
 	for (i = 0; i < nodes; i++) {
 		if (__bch_keylist_realloc(&keylist, bkey_u64s(&r[i].b->key)))
@@ -1516,7 +1528,7 @@
 		k = bch_btree_iter_next_filter(&iter, &b->keys, bch_ptr_bad);
 		if (k) {
 			r->b = bch_btree_node_get(b->c, op, k, b->level - 1,
-						  true);
+						  true, b);
 			if (IS_ERR(r->b)) {
 				ret = PTR_ERR(r->b);
 				break;
@@ -1811,7 +1823,7 @@
 			k = bch_btree_iter_next_filter(&iter, &b->keys,
 						       bch_ptr_bad);
 			if (k)
-				btree_node_prefetch(b->c, k, b->level - 1);
+				btree_node_prefetch(b, k);
 
 			if (p)
 				ret = btree(check_recurse, p, b, op);
@@ -1976,12 +1988,12 @@
 
 		trace_bcache_btree_node_split(b, btree_bset_first(n1)->keys);
 
-		n2 = bch_btree_node_alloc(b->c, op, b->level);
+		n2 = bch_btree_node_alloc(b->c, op, b->level, b->parent);
 		if (IS_ERR(n2))
 			goto err_free1;
 
 		if (!b->parent) {
-			n3 = bch_btree_node_alloc(b->c, op, b->level + 1);
+			n3 = bch_btree_node_alloc(b->c, op, b->level + 1, NULL);
 			if (IS_ERR(n3))
 				goto err_free2;
 		}
diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index 91dfa5e..5c391fa 100644
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -242,9 +242,10 @@
 void bch_btree_node_write(struct btree *, struct closure *);
 
 void bch_btree_set_root(struct btree *);
-struct btree *bch_btree_node_alloc(struct cache_set *, struct btree_op *, int);
+struct btree *__bch_btree_node_alloc(struct cache_set *, struct btree_op *,
+				     int, bool, struct btree *);
 struct btree *bch_btree_node_get(struct cache_set *, struct btree_op *,
-				 struct bkey *, int, bool);
+				 struct bkey *, int, bool, struct btree *);
 
 int bch_btree_insert_check_key(struct btree *, struct btree_op *,
 			       struct bkey *);
diff --git a/drivers/md/bcache/extents.c b/drivers/md/bcache/extents.c
index 3a0de4c..243de0bf 100644
--- a/drivers/md/bcache/extents.c
+++ b/drivers/md/bcache/extents.c
@@ -474,9 +474,8 @@
 	return false;
 }
 
-static bool bch_extent_invalid(struct btree_keys *bk, const struct bkey *k)
+bool __bch_extent_invalid(struct cache_set *c, const struct bkey *k)
 {
-	struct btree *b = container_of(bk, struct btree, keys);
 	char buf[80];
 
 	if (!KEY_SIZE(k))
@@ -485,16 +484,22 @@
 	if (KEY_SIZE(k) > KEY_OFFSET(k))
 		goto bad;
 
-	if (__ptr_invalid(b->c, k))
+	if (__ptr_invalid(c, k))
 		goto bad;
 
 	return false;
 bad:
 	bch_extent_to_text(buf, sizeof(buf), k);
-	cache_bug(b->c, "spotted extent %s: %s", buf, bch_ptr_status(b->c, k));
+	cache_bug(c, "spotted extent %s: %s", buf, bch_ptr_status(c, k));
 	return true;
 }
 
+static bool bch_extent_invalid(struct btree_keys *bk, const struct bkey *k)
+{
+	struct btree *b = container_of(bk, struct btree, keys);
+	return __bch_extent_invalid(b->c, k);
+}
+
 static bool bch_extent_bad_expensive(struct btree *b, const struct bkey *k,
 				     unsigned ptr)
 {
diff --git a/drivers/md/bcache/extents.h b/drivers/md/bcache/extents.h
index e4e2340..e2ed540 100644
--- a/drivers/md/bcache/extents.h
+++ b/drivers/md/bcache/extents.h
@@ -9,5 +9,6 @@
 
 void bch_extent_to_text(char *, size_t, const struct bkey *);
 bool __bch_btree_ptr_invalid(struct cache_set *, const struct bkey *);
+bool __bch_extent_invalid(struct cache_set *, const struct bkey *);
 
 #endif /* _BCACHE_EXTENTS_H */
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 59e8202..fe080ad 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -7,6 +7,7 @@
 #include "bcache.h"
 #include "btree.h"
 #include "debug.h"
+#include "extents.h"
 
 #include <trace/events/bcache.h>
 
@@ -189,11 +190,15 @@
 			if (read_bucket(l))
 				goto bsearch;
 
-		if (list_empty(list))
+		/* no journal entries on this device? */
+		if (l == ca->sb.njournal_buckets)
 			continue;
 bsearch:
+		BUG_ON(list_empty(list));
+
 		/* Binary search */
-		m = r = find_next_bit(bitmap, ca->sb.njournal_buckets, l + 1);
+		m = l;
+		r = find_next_bit(bitmap, ca->sb.njournal_buckets, l + 1);
 		pr_debug("starting binary search, l %u r %u", l, r);
 
 		while (l + 1 < r) {
@@ -291,15 +296,16 @@
 
 		for (k = i->j.start;
 		     k < bset_bkey_last(&i->j);
-		     k = bkey_next(k)) {
-			unsigned j;
+		     k = bkey_next(k))
+			if (!__bch_extent_invalid(c, k)) {
+				unsigned j;
 
-			for (j = 0; j < KEY_PTRS(k); j++)
-				if (ptr_available(c, k, j))
-					atomic_inc(&PTR_BUCKET(c, k, j)->pin);
+				for (j = 0; j < KEY_PTRS(k); j++)
+					if (ptr_available(c, k, j))
+						atomic_inc(&PTR_BUCKET(c, k, j)->pin);
 
-			bch_initial_mark_key(c, 0, k);
-		}
+				bch_initial_mark_key(c, 0, k);
+			}
 	}
 }
 
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 15fff4f..62e6e98 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -311,7 +311,8 @@
 {
 	struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
 
-	trace_bcache_write(op->bio, op->writeback, op->bypass);
+	trace_bcache_write(op->c, op->inode, op->bio,
+			   op->writeback, op->bypass);
 
 	bch_keylist_init(&op->insert_keys);
 	bio_get(op->bio);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 926ded8..d4713d0 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -733,8 +733,6 @@
 static void bcache_device_attach(struct bcache_device *d, struct cache_set *c,
 				 unsigned id)
 {
-	BUG_ON(test_bit(CACHE_SET_STOPPING, &c->flags));
-
 	d->id = id;
 	d->c = c;
 	c->devices[id] = d;
@@ -927,6 +925,7 @@
 	list_move(&dc->list, &uncached_devices);
 
 	clear_bit(BCACHE_DEV_DETACHING, &dc->disk.flags);
+	clear_bit(BCACHE_DEV_UNLINK_DONE, &dc->disk.flags);
 
 	mutex_unlock(&bch_register_lock);
 
@@ -1041,6 +1040,9 @@
 	 */
 	atomic_set(&dc->count, 1);
 
+	if (bch_cached_dev_writeback_start(dc))
+		return -ENOMEM;
+
 	if (BDEV_STATE(&dc->sb) == BDEV_STATE_DIRTY) {
 		bch_sectors_dirty_init(dc);
 		atomic_set(&dc->has_dirty, 1);
@@ -1070,7 +1072,8 @@
 	struct cached_dev *dc = container_of(cl, struct cached_dev, disk.cl);
 
 	cancel_delayed_work_sync(&dc->writeback_rate_update);
-	kthread_stop(dc->writeback_thread);
+	if (!IS_ERR_OR_NULL(dc->writeback_thread))
+		kthread_stop(dc->writeback_thread);
 
 	mutex_lock(&bch_register_lock);
 
@@ -1081,12 +1084,8 @@
 
 	mutex_unlock(&bch_register_lock);
 
-	if (!IS_ERR_OR_NULL(dc->bdev)) {
-		if (dc->bdev->bd_disk)
-			blk_sync_queue(bdev_get_queue(dc->bdev));
-
+	if (!IS_ERR_OR_NULL(dc->bdev))
 		blkdev_put(dc->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-	}
 
 	wake_up(&unregister_wait);
 
@@ -1213,7 +1212,9 @@
 static void flash_dev_free(struct closure *cl)
 {
 	struct bcache_device *d = container_of(cl, struct bcache_device, cl);
+	mutex_lock(&bch_register_lock);
 	bcache_device_free(d);
+	mutex_unlock(&bch_register_lock);
 	kobject_put(&d->kobj);
 }
 
@@ -1221,7 +1222,9 @@
 {
 	struct bcache_device *d = container_of(cl, struct bcache_device, cl);
 
+	mutex_lock(&bch_register_lock);
 	bcache_device_unlink(d);
+	mutex_unlock(&bch_register_lock);
 	kobject_del(&d->kobj);
 	continue_at(cl, flash_dev_free, system_wq);
 }
@@ -1277,6 +1280,9 @@
 	if (test_bit(CACHE_SET_STOPPING, &c->flags))
 		return -EINTR;
 
+	if (!test_bit(CACHE_SET_RUNNING, &c->flags))
+		return -EPERM;
+
 	u = uuid_find_empty(c);
 	if (!u) {
 		pr_err("Can't create volume, no room for UUID");
@@ -1346,8 +1352,11 @@
 	bch_journal_free(c);
 
 	for_each_cache(ca, c, i)
-		if (ca)
+		if (ca) {
+			ca->set = NULL;
+			c->cache[ca->sb.nr_this_dev] = NULL;
 			kobject_put(&ca->kobj);
+		}
 
 	bch_bset_sort_state_free(&c->sort);
 	free_pages((unsigned long) c->uuids, ilog2(bucket_pages(c)));
@@ -1405,9 +1414,11 @@
 		if (ca->alloc_thread)
 			kthread_stop(ca->alloc_thread);
 
-	cancel_delayed_work_sync(&c->journal.work);
-	/* flush last journal entry if needed */
-	c->journal.work.work.func(&c->journal.work.work);
+	if (c->journal.cur) {
+		cancel_delayed_work_sync(&c->journal.work);
+		/* flush last journal entry if needed */
+		c->journal.work.work.func(&c->journal.work.work);
+	}
 
 	closure_return(cl);
 }
@@ -1586,7 +1597,7 @@
 			goto err;
 
 		err = "error reading btree root";
-		c->root = bch_btree_node_get(c, NULL, k, j->btree_level, true);
+		c->root = bch_btree_node_get(c, NULL, k, j->btree_level, true, NULL);
 		if (IS_ERR_OR_NULL(c->root))
 			goto err;
 
@@ -1661,7 +1672,7 @@
 			goto err;
 
 		err = "cannot allocate new btree root";
-		c->root = bch_btree_node_alloc(c, NULL, 0);
+		c->root = __bch_btree_node_alloc(c, NULL, 0, true, NULL);
 		if (IS_ERR_OR_NULL(c->root))
 			goto err;
 
@@ -1697,6 +1708,7 @@
 
 	flash_devs_run(c);
 
+	set_bit(CACHE_SET_RUNNING, &c->flags);
 	return;
 err:
 	closure_sync(&cl);
@@ -1760,6 +1772,7 @@
 		pr_debug("set version = %llu", c->sb.version);
 	}
 
+	kobject_get(&ca->kobj);
 	ca->set = c;
 	ca->set->cache[ca->sb.nr_this_dev] = ca;
 	c->cache_by_alloc[c->caches_loaded++] = ca;
@@ -1780,8 +1793,10 @@
 	struct cache *ca = container_of(kobj, struct cache, kobj);
 	unsigned i;
 
-	if (ca->set)
+	if (ca->set) {
+		BUG_ON(ca->set->cache[ca->sb.nr_this_dev] != ca);
 		ca->set->cache[ca->sb.nr_this_dev] = NULL;
+	}
 
 	bio_split_pool_free(&ca->bio_split_hook);
 
@@ -1798,10 +1813,8 @@
 	if (ca->sb_bio.bi_inline_vecs[0].bv_page)
 		put_page(ca->sb_bio.bi_io_vec[0].bv_page);
 
-	if (!IS_ERR_OR_NULL(ca->bdev)) {
-		blk_sync_queue(bdev_get_queue(ca->bdev));
+	if (!IS_ERR_OR_NULL(ca->bdev))
 		blkdev_put(ca->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
-	}
 
 	kfree(ca);
 	module_put(THIS_MODULE);
@@ -1844,7 +1857,7 @@
 }
 
 static void register_cache(struct cache_sb *sb, struct page *sb_page,
-				  struct block_device *bdev, struct cache *ca)
+				struct block_device *bdev, struct cache *ca)
 {
 	char name[BDEVNAME_SIZE];
 	const char *err = "cannot allocate memory";
@@ -1877,10 +1890,12 @@
 		goto err;
 
 	pr_info("registered cache device %s", bdevname(bdev, name));
+out:
+	kobject_put(&ca->kobj);
 	return;
 err:
 	pr_notice("error opening %s: %s", bdevname(bdev, name), err);
-	kobject_put(&ca->kobj);
+	goto out;
 }
 
 /* Global interfaces/init */
@@ -1945,10 +1960,12 @@
 	if (IS_ERR(bdev)) {
 		if (bdev == ERR_PTR(-EBUSY)) {
 			bdev = lookup_bdev(strim(path));
+			mutex_lock(&bch_register_lock);
 			if (!IS_ERR(bdev) && bch_is_open(bdev))
 				err = "device already registered";
 			else
 				err = "device busy";
+			mutex_unlock(&bch_register_lock);
 		}
 		goto err;
 	}
diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
index ac7d0d1..98df757 100644
--- a/drivers/md/bcache/util.h
+++ b/drivers/md/bcache/util.h
@@ -416,8 +416,8 @@
 			  average_frequency,	frequency_units);	\
 	__print_time_stat(stats, name,					\
 			  average_duration,	duration_units);	\
-	__print_time_stat(stats, name,					\
-			  max_duration,		duration_units);	\
+	sysfs_print(name ## _ ##max_duration ## _ ## duration_units,	\
+			div_u64((stats)->max_duration, NSEC_PER_ ## duration_units));\
 									\
 	sysfs_print(name ## _last_ ## frequency_units, (stats)->last	\
 		    ? div_s64(local_clock() - (stats)->last,		\
diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index f4300e4..f1986bc 100644
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -239,7 +239,7 @@
 		if (KEY_START(&w->key) != dc->last_read ||
 		    jiffies_to_msecs(delay) > 50)
 			while (!kthread_should_stop() && delay)
-				delay = schedule_timeout_uninterruptible(delay);
+				delay = schedule_timeout_interruptible(delay);
 
 		dc->last_read	= KEY_OFFSET(&w->key);
 
@@ -436,7 +436,7 @@
 			while (delay &&
 			       !kthread_should_stop() &&
 			       !test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags))
-				delay = schedule_timeout_uninterruptible(delay);
+				delay = schedule_timeout_interruptible(delay);
 		}
 	}
 
@@ -478,7 +478,7 @@
 	dc->disk.sectors_dirty_last = bcache_dev_sectors_dirty(&dc->disk);
 }
 
-int bch_cached_dev_writeback_init(struct cached_dev *dc)
+void bch_cached_dev_writeback_init(struct cached_dev *dc)
 {
 	sema_init(&dc->in_flight, 64);
 	init_rwsem(&dc->writeback_lock);
@@ -494,14 +494,20 @@
 	dc->writeback_rate_d_term	= 30;
 	dc->writeback_rate_p_term_inverse = 6000;
 
+	INIT_DELAYED_WORK(&dc->writeback_rate_update, update_writeback_rate);
+}
+
+int bch_cached_dev_writeback_start(struct cached_dev *dc)
+{
 	dc->writeback_thread = kthread_create(bch_writeback_thread, dc,
 					      "bcache_writeback");
 	if (IS_ERR(dc->writeback_thread))
 		return PTR_ERR(dc->writeback_thread);
 
-	INIT_DELAYED_WORK(&dc->writeback_rate_update, update_writeback_rate);
 	schedule_delayed_work(&dc->writeback_rate_update,
 			      dc->writeback_rate_update_seconds * HZ);
 
+	bch_writeback_queue(dc);
+
 	return 0;
 }
diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h
index e2f8598..0a9dab1 100644
--- a/drivers/md/bcache/writeback.h
+++ b/drivers/md/bcache/writeback.h
@@ -85,6 +85,7 @@
 void bcache_dev_sectors_dirty_add(struct cache_set *, unsigned, uint64_t, int);
 
 void bch_sectors_dirty_init(struct cached_dev *dc);
-int bch_cached_dev_writeback_init(struct cached_dev *);
+void bch_cached_dev_writeback_init(struct cached_dev *);
+int bch_cached_dev_writeback_start(struct cached_dev *);
 
 #endif
diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
index d2899e7..0670925 100644
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -330,7 +330,7 @@
 	disk_super->discard_root = cpu_to_le64(cmd->discard_root);
 	disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size);
 	disk_super->discard_nr_blocks = cpu_to_le64(from_oblock(cmd->discard_nr_blocks));
-	disk_super->metadata_block_size = cpu_to_le32(DM_CACHE_METADATA_BLOCK_SIZE >> SECTOR_SHIFT);
+	disk_super->metadata_block_size = cpu_to_le32(DM_CACHE_METADATA_BLOCK_SIZE);
 	disk_super->data_block_size = cpu_to_le32(cmd->data_block_size);
 	disk_super->cache_blocks = cpu_to_le32(0);
 
@@ -478,7 +478,7 @@
 					    bool may_format_device)
 {
 	int r;
-	cmd->bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE,
+	cmd->bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT,
 					  CACHE_METADATA_CACHE_SIZE,
 					  CACHE_MAX_CONCURRENT_LOCKS);
 	if (IS_ERR(cmd->bm)) {
diff --git a/drivers/md/dm-cache-metadata.h b/drivers/md/dm-cache-metadata.h
index cd70a78..7383c90 100644
--- a/drivers/md/dm-cache-metadata.h
+++ b/drivers/md/dm-cache-metadata.h
@@ -9,19 +9,17 @@
 
 #include "dm-cache-block-types.h"
 #include "dm-cache-policy-internal.h"
+#include "persistent-data/dm-space-map-metadata.h"
 
 /*----------------------------------------------------------------*/
 
-#define DM_CACHE_METADATA_BLOCK_SIZE 4096
+#define DM_CACHE_METADATA_BLOCK_SIZE DM_SM_METADATA_BLOCK_SIZE
 
 /* FIXME: remove this restriction */
 /*
  * The metadata device is currently limited in size.
- *
- * We have one block of index, which can hold 255 index entries.  Each
- * index entry contains allocation info about 16k metadata blocks.
  */
-#define DM_CACHE_METADATA_MAX_SECTORS (255 * (1 << 14) * (DM_CACHE_METADATA_BLOCK_SIZE / (1 << SECTOR_SHIFT)))
+#define DM_CACHE_METADATA_MAX_SECTORS DM_SM_METADATA_MAX_SECTORS
 
 /*
  * A metadata device larger than 16GB triggers a warning.
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 2c63326..1af40ee 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -718,6 +718,22 @@
 	return bio->bi_rw & (REQ_FLUSH | REQ_FUA);
 }
 
+/*
+ * You must increment the deferred set whilst the prison cell is held.  To
+ * encourage this, we ask for 'cell' to be passed in.
+ */
+static void inc_ds(struct cache *cache, struct bio *bio,
+		   struct dm_bio_prison_cell *cell)
+{
+	size_t pb_data_size = get_per_bio_data_size(cache);
+	struct per_bio_data *pb = get_per_bio_data(bio, pb_data_size);
+
+	BUG_ON(!cell);
+	BUG_ON(pb->all_io_entry);
+
+	pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
+}
+
 static void issue(struct cache *cache, struct bio *bio)
 {
 	unsigned long flags;
@@ -737,6 +753,12 @@
 	spin_unlock_irqrestore(&cache->lock, flags);
 }
 
+static void inc_and_issue(struct cache *cache, struct bio *bio, struct dm_bio_prison_cell *cell)
+{
+	inc_ds(cache, bio, cell);
+	issue(cache, bio);
+}
+
 static void defer_writethrough_bio(struct cache *cache, struct bio *bio)
 {
 	unsigned long flags;
@@ -1015,6 +1037,11 @@
 
 	dm_hook_bio(&pb->hook_info, bio, overwrite_endio, mg);
 	remap_to_cache_dirty(mg->cache, bio, mg->new_oblock, mg->cblock);
+
+	/*
+	 * No need to inc_ds() here, since the cell will be held for the
+	 * duration of the io.
+	 */
 	generic_make_request(bio);
 }
 
@@ -1115,8 +1142,7 @@
 		return;
 
 	INIT_LIST_HEAD(&work);
-	if (pb->all_io_entry)
-		dm_deferred_entry_dec(pb->all_io_entry, &work);
+	dm_deferred_entry_dec(pb->all_io_entry, &work);
 
 	if (!list_empty(&work))
 		queue_quiesced_migrations(cache, &work);
@@ -1252,6 +1278,11 @@
 	else
 		remap_to_cache(cache, bio, 0);
 
+	/*
+	 * REQ_FLUSH is not directed at any particular block so we don't
+	 * need to inc_ds().  REQ_FUA's are split into a write + REQ_FLUSH
+	 * by dm-core.
+	 */
 	issue(cache, bio);
 }
 
@@ -1301,15 +1332,6 @@
 		   &cache->stats.read_miss : &cache->stats.write_miss);
 }
 
-static void issue_cache_bio(struct cache *cache, struct bio *bio,
-			    struct per_bio_data *pb,
-			    dm_oblock_t oblock, dm_cblock_t cblock)
-{
-	pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
-	remap_to_cache_dirty(cache, bio, oblock, cblock);
-	issue(cache, bio);
-}
-
 static void process_bio(struct cache *cache, struct prealloc *structs,
 			struct bio *bio)
 {
@@ -1318,8 +1340,6 @@
 	dm_oblock_t block = get_bio_block(cache, bio);
 	struct dm_bio_prison_cell *cell_prealloc, *old_ocell, *new_ocell;
 	struct policy_result lookup_result;
-	size_t pb_data_size = get_per_bio_data_size(cache);
-	struct per_bio_data *pb = get_per_bio_data(bio, pb_data_size);
 	bool discarded_block = is_discarded_oblock(cache, block);
 	bool passthrough = passthrough_mode(&cache->features);
 	bool can_migrate = !passthrough && (discarded_block || spare_migration_bandwidth(cache));
@@ -1359,9 +1379,8 @@
 
 			} else {
 				/* FIXME: factor out issue_origin() */
-				pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
 				remap_to_origin_clear_discard(cache, bio, block);
-				issue(cache, bio);
+				inc_and_issue(cache, bio, new_ocell);
 			}
 		} else {
 			inc_hit_counter(cache, bio);
@@ -1369,20 +1388,21 @@
 			if (bio_data_dir(bio) == WRITE &&
 			    writethrough_mode(&cache->features) &&
 			    !is_dirty(cache, lookup_result.cblock)) {
-				pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
 				remap_to_origin_then_cache(cache, bio, block, lookup_result.cblock);
-				issue(cache, bio);
-			} else
-				issue_cache_bio(cache, bio, pb, block, lookup_result.cblock);
+				inc_and_issue(cache, bio, new_ocell);
+
+			} else  {
+				remap_to_cache_dirty(cache, bio, block, lookup_result.cblock);
+				inc_and_issue(cache, bio, new_ocell);
+			}
 		}
 
 		break;
 
 	case POLICY_MISS:
 		inc_miss_counter(cache, bio);
-		pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
 		remap_to_origin_clear_discard(cache, bio, block);
-		issue(cache, bio);
+		inc_and_issue(cache, bio, new_ocell);
 		break;
 
 	case POLICY_NEW:
@@ -1501,6 +1521,9 @@
 	bio_list_init(&cache->deferred_flush_bios);
 	spin_unlock_irqrestore(&cache->lock, flags);
 
+	/*
+	 * These bios have already been through inc_ds()
+	 */
 	while ((bio = bio_list_pop(&bios)))
 		submit_bios ? generic_make_request(bio) : bio_io_error(bio);
 }
@@ -1518,6 +1541,9 @@
 	bio_list_init(&cache->deferred_writethrough_bios);
 	spin_unlock_irqrestore(&cache->lock, flags);
 
+	/*
+	 * These bios have already been through inc_ds()
+	 */
 	while ((bio = bio_list_pop(&bios)))
 		generic_make_request(bio);
 }
@@ -1694,6 +1720,7 @@
 
 		if (commit_if_needed(cache)) {
 			process_deferred_flush_bios(cache, false);
+			process_migrations(cache, &cache->need_commit_migrations, migration_failure);
 
 			/*
 			 * FIXME: rollback metadata or just go into a
@@ -2406,16 +2433,13 @@
 	return r;
 }
 
-static int cache_map(struct dm_target *ti, struct bio *bio)
+static int __cache_map(struct cache *cache, struct bio *bio, struct dm_bio_prison_cell **cell)
 {
-	struct cache *cache = ti->private;
-
 	int r;
 	dm_oblock_t block = get_bio_block(cache, bio);
 	size_t pb_data_size = get_per_bio_data_size(cache);
 	bool can_migrate = false;
 	bool discarded_block;
-	struct dm_bio_prison_cell *cell;
 	struct policy_result lookup_result;
 	struct per_bio_data *pb = init_per_bio_data(bio, pb_data_size);
 
@@ -2437,15 +2461,15 @@
 	/*
 	 * Check to see if that block is currently migrating.
 	 */
-	cell = alloc_prison_cell(cache);
-	if (!cell) {
+	*cell = alloc_prison_cell(cache);
+	if (!*cell) {
 		defer_bio(cache, bio);
 		return DM_MAPIO_SUBMITTED;
 	}
 
-	r = bio_detain(cache, block, bio, cell,
+	r = bio_detain(cache, block, bio, *cell,
 		       (cell_free_fn) free_prison_cell,
-		       cache, &cell);
+		       cache, cell);
 	if (r) {
 		if (r < 0)
 			defer_bio(cache, bio);
@@ -2458,11 +2482,12 @@
 	r = policy_map(cache->policy, block, false, can_migrate, discarded_block,
 		       bio, &lookup_result);
 	if (r == -EWOULDBLOCK) {
-		cell_defer(cache, cell, true);
+		cell_defer(cache, *cell, true);
 		return DM_MAPIO_SUBMITTED;
 
 	} else if (r) {
 		DMERR_LIMIT("Unexpected return from cache replacement policy: %d", r);
+		cell_defer(cache, *cell, false);
 		bio_io_error(bio);
 		return DM_MAPIO_SUBMITTED;
 	}
@@ -2476,52 +2501,44 @@
 				 * We need to invalidate this block, so
 				 * defer for the worker thread.
 				 */
-				cell_defer(cache, cell, true);
+				cell_defer(cache, *cell, true);
 				r = DM_MAPIO_SUBMITTED;
 
 			} else {
-				pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
 				inc_miss_counter(cache, bio);
 				remap_to_origin_clear_discard(cache, bio, block);
-
-				cell_defer(cache, cell, false);
 			}
 
 		} else {
 			inc_hit_counter(cache, bio);
-			pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
-
 			if (bio_data_dir(bio) == WRITE && writethrough_mode(&cache->features) &&
 			    !is_dirty(cache, lookup_result.cblock))
 				remap_to_origin_then_cache(cache, bio, block, lookup_result.cblock);
 			else
 				remap_to_cache_dirty(cache, bio, block, lookup_result.cblock);
-
-			cell_defer(cache, cell, false);
 		}
 		break;
 
 	case POLICY_MISS:
 		inc_miss_counter(cache, bio);
-		pb->all_io_entry = dm_deferred_entry_inc(cache->all_io_ds);
-
 		if (pb->req_nr != 0) {
 			/*
 			 * This is a duplicate writethrough io that is no
 			 * longer needed because the block has been demoted.
 			 */
 			bio_endio(bio, 0);
-			cell_defer(cache, cell, false);
-			return DM_MAPIO_SUBMITTED;
-		} else {
+			cell_defer(cache, *cell, false);
+			r = DM_MAPIO_SUBMITTED;
+
+		} else
 			remap_to_origin_clear_discard(cache, bio, block);
-			cell_defer(cache, cell, false);
-		}
+
 		break;
 
 	default:
 		DMERR_LIMIT("%s: erroring bio: unknown policy op: %u", __func__,
 			    (unsigned) lookup_result.op);
+		cell_defer(cache, *cell, false);
 		bio_io_error(bio);
 		r = DM_MAPIO_SUBMITTED;
 	}
@@ -2529,6 +2546,21 @@
 	return r;
 }
 
+static int cache_map(struct dm_target *ti, struct bio *bio)
+{
+	int r;
+	struct dm_bio_prison_cell *cell;
+	struct cache *cache = ti->private;
+
+	r = __cache_map(cache, bio, &cell);
+	if (r == DM_MAPIO_REMAPPED) {
+		inc_ds(cache, bio, cell);
+		cell_defer(cache, cell, false);
+	}
+
+	return r;
+}
+
 static int cache_end_io(struct dm_target *ti, struct bio *bio, int error)
 {
 	struct cache *cache = ti->private;
@@ -2808,7 +2840,7 @@
 		residency = policy_residency(cache->policy);
 
 		DMEMIT("%u %llu/%llu %u %llu/%llu %u %u %u %u %u %u %lu ",
-		       (unsigned)(DM_CACHE_METADATA_BLOCK_SIZE >> SECTOR_SHIFT),
+		       (unsigned)DM_CACHE_METADATA_BLOCK_SIZE,
 		       (unsigned long long)(nr_blocks_metadata - nr_free_blocks_metadata),
 		       (unsigned long long)nr_blocks_metadata,
 		       cache->sectors_per_block,
@@ -3062,7 +3094,7 @@
 	 */
 	if (io_opt_sectors < cache->sectors_per_block ||
 	    do_div(io_opt_sectors, cache->sectors_per_block)) {
-		blk_limits_io_min(limits, 0);
+		blk_limits_io_min(limits, cache->sectors_per_block << SECTOR_SHIFT);
 		blk_limits_io_opt(limits, cache->sectors_per_block << SECTOR_SHIFT);
 	}
 	set_discard_limits(cache, limits);
@@ -3072,7 +3104,7 @@
 
 static struct target_type cache_target = {
 	.name = "cache",
-	.version = {1, 4, 0},
+	.version = {1, 5, 0},
 	.module = THIS_MODULE,
 	.ctr = cache_ctr,
 	.dtr = cache_dtr,
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 4cba2d8..2785007 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -59,7 +59,7 @@
 	int error;
 	sector_t sector;
 	struct dm_crypt_io *base_io;
-};
+} CRYPTO_MINALIGN_ATTR;
 
 struct dm_crypt_request {
 	struct convert_context *ctx;
@@ -162,6 +162,8 @@
 	 */
 	unsigned int dmreq_start;
 
+	unsigned int per_bio_data_size;
+
 	unsigned long flags;
 	unsigned int key_size;
 	unsigned int key_parts;      /* independent parts in key buffer */
@@ -895,6 +897,15 @@
 	    kcryptd_async_done, dmreq_of_req(cc, ctx->req));
 }
 
+static void crypt_free_req(struct crypt_config *cc,
+			   struct ablkcipher_request *req, struct bio *base_bio)
+{
+	struct dm_crypt_io *io = dm_per_bio_data(base_bio, cc->per_bio_data_size);
+
+	if ((struct ablkcipher_request *)(io + 1) != req)
+		mempool_free(req, cc->req_pool);
+}
+
 /*
  * Encrypt / decrypt data from one bio to another one (can be the same one)
  */
@@ -1008,12 +1019,9 @@
 	}
 }
 
-static struct dm_crypt_io *crypt_io_alloc(struct crypt_config *cc,
-					  struct bio *bio, sector_t sector)
+static void crypt_io_init(struct dm_crypt_io *io, struct crypt_config *cc,
+			  struct bio *bio, sector_t sector)
 {
-	struct dm_crypt_io *io;
-
-	io = mempool_alloc(cc->io_pool, GFP_NOIO);
 	io->cc = cc;
 	io->base_bio = bio;
 	io->sector = sector;
@@ -1021,8 +1029,6 @@
 	io->base_io = NULL;
 	io->ctx.req = NULL;
 	atomic_set(&io->io_pending, 0);
-
-	return io;
 }
 
 static void crypt_inc_pending(struct dm_crypt_io *io)
@@ -1046,8 +1052,9 @@
 		return;
 
 	if (io->ctx.req)
-		mempool_free(io->ctx.req, cc->req_pool);
-	mempool_free(io, cc->io_pool);
+		crypt_free_req(cc, io->ctx.req, base_bio);
+	if (io != dm_per_bio_data(base_bio, cc->per_bio_data_size))
+		mempool_free(io, cc->io_pool);
 
 	if (likely(!base_io))
 		bio_endio(base_bio, error);
@@ -1255,8 +1262,8 @@
 		 * between fragments, so switch to a new dm_crypt_io structure.
 		 */
 		if (unlikely(!crypt_finished && remaining)) {
-			new_io = crypt_io_alloc(io->cc, io->base_bio,
-						sector);
+			new_io = mempool_alloc(cc->io_pool, GFP_NOIO);
+			crypt_io_init(new_io, io->cc, io->base_bio, sector);
 			crypt_inc_pending(new_io);
 			crypt_convert_init(cc, &new_io->ctx, NULL,
 					   io->base_bio, sector);
@@ -1325,7 +1332,7 @@
 	if (error < 0)
 		io->error = -EIO;
 
-	mempool_free(req_of_dmreq(cc, dmreq), cc->req_pool);
+	crypt_free_req(cc, req_of_dmreq(cc, dmreq), io->base_bio);
 
 	if (!atomic_dec_and_test(&ctx->cc_pending))
 		return;
@@ -1728,6 +1735,10 @@
 		goto bad;
 	}
 
+	cc->per_bio_data_size = ti->per_bio_data_size =
+				sizeof(struct dm_crypt_io) + cc->dmreq_start +
+				sizeof(struct dm_crypt_request) + cc->iv_size;
+
 	cc->page_pool = mempool_create_page_pool(MIN_POOL_PAGES, 0);
 	if (!cc->page_pool) {
 		ti->error = "Cannot allocate page mempool";
@@ -1824,7 +1835,9 @@
 		return DM_MAPIO_REMAPPED;
 	}
 
-	io = crypt_io_alloc(cc, bio, dm_target_offset(ti, bio->bi_iter.bi_sector));
+	io = dm_per_bio_data(bio, cc->per_bio_data_size);
+	crypt_io_init(io, cc, bio, dm_target_offset(ti, bio->bi_iter.bi_sector));
+	io->ctx.req = (struct ablkcipher_request *)(io + 1);
 
 	if (bio_data_dir(io->base_bio) == READ) {
 		if (kcryptd_io_read(io, GFP_NOWAIT))
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index db404a0..c09359d 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -33,7 +33,6 @@
 struct io {
 	unsigned long error_bits;
 	atomic_t count;
-	struct completion *wait;
 	struct dm_io_client *client;
 	io_notify_fn callback;
 	void *context;
@@ -112,28 +111,27 @@
  * We need an io object to keep track of the number of bios that
  * have been dispatched for a particular io.
  *---------------------------------------------------------------*/
+static void complete_io(struct io *io)
+{
+	unsigned long error_bits = io->error_bits;
+	io_notify_fn fn = io->callback;
+	void *context = io->context;
+
+	if (io->vma_invalidate_size)
+		invalidate_kernel_vmap_range(io->vma_invalidate_address,
+					     io->vma_invalidate_size);
+
+	mempool_free(io, io->client->pool);
+	fn(error_bits, context);
+}
+
 static void dec_count(struct io *io, unsigned int region, int error)
 {
 	if (error)
 		set_bit(region, &io->error_bits);
 
-	if (atomic_dec_and_test(&io->count)) {
-		if (io->vma_invalidate_size)
-			invalidate_kernel_vmap_range(io->vma_invalidate_address,
-						     io->vma_invalidate_size);
-
-		if (io->wait)
-			complete(io->wait);
-
-		else {
-			unsigned long r = io->error_bits;
-			io_notify_fn fn = io->callback;
-			void *context = io->context;
-
-			mempool_free(io, io->client->pool);
-			fn(r, context);
-		}
-	}
+	if (atomic_dec_and_test(&io->count))
+		complete_io(io);
 }
 
 static void endio(struct bio *bio, int error)
@@ -376,41 +374,51 @@
 	dec_count(io, 0, 0);
 }
 
+struct sync_io {
+	unsigned long error_bits;
+	struct completion wait;
+};
+
+static void sync_io_complete(unsigned long error, void *context)
+{
+	struct sync_io *sio = context;
+
+	sio->error_bits = error;
+	complete(&sio->wait);
+}
+
 static int sync_io(struct dm_io_client *client, unsigned int num_regions,
 		   struct dm_io_region *where, int rw, struct dpages *dp,
 		   unsigned long *error_bits)
 {
-	/*
-	 * gcc <= 4.3 can't do the alignment for stack variables, so we must
-	 * align it on our own.
-	 * volatile prevents the optimizer from removing or reusing
-	 * "io_" field from the stack frame (allowed in ANSI C).
-	 */
-	volatile char io_[sizeof(struct io) + __alignof__(struct io) - 1];
-	struct io *io = (struct io *)PTR_ALIGN(&io_, __alignof__(struct io));
-	DECLARE_COMPLETION_ONSTACK(wait);
+	struct io *io;
+	struct sync_io sio;
 
 	if (num_regions > 1 && (rw & RW_MASK) != WRITE) {
 		WARN_ON(1);
 		return -EIO;
 	}
 
+	init_completion(&sio.wait);
+
+	io = mempool_alloc(client->pool, GFP_NOIO);
 	io->error_bits = 0;
 	atomic_set(&io->count, 1); /* see dispatch_io() */
-	io->wait = &wait;
 	io->client = client;
+	io->callback = sync_io_complete;
+	io->context = &sio;
 
 	io->vma_invalidate_address = dp->vma_invalidate_address;
 	io->vma_invalidate_size = dp->vma_invalidate_size;
 
 	dispatch_io(rw, num_regions, where, dp, io, 1);
 
-	wait_for_completion_io(&wait);
+	wait_for_completion_io(&sio.wait);
 
 	if (error_bits)
-		*error_bits = io->error_bits;
+		*error_bits = sio.error_bits;
 
-	return io->error_bits ? -EIO : 0;
+	return sio.error_bits ? -EIO : 0;
 }
 
 static int async_io(struct dm_io_client *client, unsigned int num_regions,
@@ -428,7 +436,6 @@
 	io = mempool_alloc(client->pool, GFP_NOIO);
 	io->error_bits = 0;
 	atomic_set(&io->count, 1); /* see dispatch_io() */
-	io->wait = NULL;
 	io->client = client;
 	io->callback = fn;
 	io->context = context;
@@ -481,9 +488,9 @@
  * New collapsed (a)synchronous interface.
  *
  * If the IO is asynchronous (i.e. it has notify.fn), you must either unplug
- * the queue with blk_unplug() some time later or set REQ_SYNC in
-io_req->bi_rw. If you fail to do one of these, the IO will be submitted to
- * the disk after q->unplug_delay, which defaults to 3ms in blk-settings.c.
+ * the queue with blk_unplug() some time later or set REQ_SYNC in io_req->bi_rw.
+ * If you fail to do one of these, the IO will be submitted to the disk after
+ * q->unplug_delay, which defaults to 3ms in blk-settings.c.
  */
 int dm_io(struct dm_io_request *io_req, unsigned num_regions,
 	  struct dm_io_region *where, unsigned long *sync_error_bits)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index f4167b0..833d7e7 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -373,8 +373,6 @@
 		 dm_noflush_suspending(m->ti)));
 }
 
-#define pg_ready(m) (!(m)->queue_io && !(m)->pg_init_required)
-
 /*
  * Map cloned requests
  */
@@ -402,11 +400,11 @@
 		if (!__must_push_back(m))
 			r = -EIO;	/* Failed */
 		goto out_unlock;
-	}
-	if (!pg_ready(m)) {
+	} else if (m->queue_io || m->pg_init_required) {
 		__pg_init_all_paths(m);
 		goto out_unlock;
 	}
+
 	if (set_mapinfo(m, map_context) < 0)
 		/* ENOMEM, requeue */
 		goto out_unlock;
diff --git a/drivers/md/dm-switch.c b/drivers/md/dm-switch.c
index 09a688b..50fca46 100644
--- a/drivers/md/dm-switch.c
+++ b/drivers/md/dm-switch.c
@@ -137,13 +137,23 @@
 	*bit *= sctx->region_table_entry_bits;
 }
 
+static unsigned switch_region_table_read(struct switch_ctx *sctx, unsigned long region_nr)
+{
+	unsigned long region_index;
+	unsigned bit;
+
+	switch_get_position(sctx, region_nr, &region_index, &bit);
+
+	return (ACCESS_ONCE(sctx->region_table[region_index]) >> bit) &
+		((1 << sctx->region_table_entry_bits) - 1);
+}
+
 /*
  * Find which path to use at given offset.
  */
 static unsigned switch_get_path_nr(struct switch_ctx *sctx, sector_t offset)
 {
-	unsigned long region_index;
-	unsigned bit, path_nr;
+	unsigned path_nr;
 	sector_t p;
 
 	p = offset;
@@ -152,9 +162,7 @@
 	else
 		sector_div(p, sctx->region_size);
 
-	switch_get_position(sctx, p, &region_index, &bit);
-	path_nr = (ACCESS_ONCE(sctx->region_table[region_index]) >> bit) &
-	       ((1 << sctx->region_table_entry_bits) - 1);
+	path_nr = switch_region_table_read(sctx, p);
 
 	/* This can only happen if the processor uses non-atomic stores. */
 	if (unlikely(path_nr >= sctx->nr_paths))
@@ -363,7 +371,7 @@
 }
 
 static int process_set_region_mappings(struct switch_ctx *sctx,
-			     unsigned argc, char **argv)
+				       unsigned argc, char **argv)
 {
 	unsigned i;
 	unsigned long region_index = 0;
@@ -372,6 +380,51 @@
 		unsigned long path_nr;
 		const char *string = argv[i];
 
+		if ((*string & 0xdf) == 'R') {
+			unsigned long cycle_length, num_write;
+
+			string++;
+			if (unlikely(*string == ',')) {
+				DMWARN("invalid set_region_mappings argument: '%s'", argv[i]);
+				return -EINVAL;
+			}
+			cycle_length = parse_hex(&string);
+			if (unlikely(*string != ',')) {
+				DMWARN("invalid set_region_mappings argument: '%s'", argv[i]);
+				return -EINVAL;
+			}
+			string++;
+			if (unlikely(!*string)) {
+				DMWARN("invalid set_region_mappings argument: '%s'", argv[i]);
+				return -EINVAL;
+			}
+			num_write = parse_hex(&string);
+			if (unlikely(*string)) {
+				DMWARN("invalid set_region_mappings argument: '%s'", argv[i]);
+				return -EINVAL;
+			}
+
+			if (unlikely(!cycle_length) || unlikely(cycle_length - 1 > region_index)) {
+				DMWARN("invalid set_region_mappings cycle length: %lu > %lu",
+				       cycle_length - 1, region_index);
+				return -EINVAL;
+			}
+			if (unlikely(region_index + num_write < region_index) ||
+			    unlikely(region_index + num_write >= sctx->nr_regions)) {
+				DMWARN("invalid set_region_mappings region number: %lu + %lu >= %lu",
+				       region_index, num_write, sctx->nr_regions);
+				return -EINVAL;
+			}
+
+			while (num_write--) {
+				region_index++;
+				path_nr = switch_region_table_read(sctx, region_index - cycle_length);
+				switch_region_table_write(sctx, region_index, path_nr);
+			}
+
+			continue;
+		}
+
 		if (*string == ':')
 			region_index++;
 		else {
@@ -500,7 +553,7 @@
 
 static struct target_type switch_target = {
 	.name = "switch",
-	.version = {1, 0, 0},
+	.version = {1, 1, 0},
 	.module = THIS_MODULE,
 	.ctr = switch_ctr,
 	.dtr = switch_dtr,
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 5f59f1e..f9c6cb8 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1386,6 +1386,14 @@
 	return q && !blk_queue_add_random(q);
 }
 
+static int queue_supports_sg_merge(struct dm_target *ti, struct dm_dev *dev,
+				   sector_t start, sector_t len, void *data)
+{
+	struct request_queue *q = bdev_get_queue(dev->bdev);
+
+	return q && !test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags);
+}
+
 static bool dm_table_all_devices_attribute(struct dm_table *t,
 					   iterate_devices_callout_fn func)
 {
@@ -1430,6 +1438,43 @@
 	return true;
 }
 
+static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev,
+				  sector_t start, sector_t len, void *data)
+{
+	struct request_queue *q = bdev_get_queue(dev->bdev);
+
+	return q && blk_queue_discard(q);
+}
+
+static bool dm_table_supports_discards(struct dm_table *t)
+{
+	struct dm_target *ti;
+	unsigned i = 0;
+
+	/*
+	 * Unless any target used by the table set discards_supported,
+	 * require at least one underlying device to support discards.
+	 * t->devices includes internal dm devices such as mirror logs
+	 * so we need to use iterate_devices here, which targets
+	 * supporting discard selectively must provide.
+	 */
+	while (i < dm_table_get_num_targets(t)) {
+		ti = dm_table_get_target(t, i++);
+
+		if (!ti->num_discard_bios)
+			continue;
+
+		if (ti->discards_supported)
+			return 1;
+
+		if (ti->type->iterate_devices &&
+		    ti->type->iterate_devices(ti, device_discard_capable, NULL))
+			return 1;
+	}
+
+	return 0;
+}
+
 void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
 			       struct queue_limits *limits)
 {
@@ -1464,6 +1509,11 @@
 	if (!dm_table_supports_write_same(t))
 		q->limits.max_write_same_sectors = 0;
 
+	if (dm_table_all_devices_attribute(t, queue_supports_sg_merge))
+		queue_flag_clear_unlocked(QUEUE_FLAG_NO_SG_MERGE, q);
+	else
+		queue_flag_set_unlocked(QUEUE_FLAG_NO_SG_MERGE, q);
+
 	dm_table_set_integrity(t);
 
 	/*
@@ -1636,39 +1686,3 @@
 }
 EXPORT_SYMBOL(dm_table_run_md_queue_async);
 
-static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev,
-				  sector_t start, sector_t len, void *data)
-{
-	struct request_queue *q = bdev_get_queue(dev->bdev);
-
-	return q && blk_queue_discard(q);
-}
-
-bool dm_table_supports_discards(struct dm_table *t)
-{
-	struct dm_target *ti;
-	unsigned i = 0;
-
-	/*
-	 * Unless any target used by the table set discards_supported,
-	 * require at least one underlying device to support discards.
-	 * t->devices includes internal dm devices such as mirror logs
-	 * so we need to use iterate_devices here, which targets
-	 * supporting discard selectively must provide.
-	 */
-	while (i < dm_table_get_num_targets(t)) {
-		ti = dm_table_get_target(t, i++);
-
-		if (!ti->num_discard_bios)
-			continue;
-
-		if (ti->discards_supported)
-			return 1;
-
-		if (ti->type->iterate_devices &&
-		    ti->type->iterate_devices(ti, device_discard_capable, NULL))
-			return 1;
-	}
-
-	return 0;
-}
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index fc9c848..4843801 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -227,6 +227,7 @@
 	struct list_head list;
 	struct dm_dev *pool_dev;
 	struct dm_dev *origin_dev;
+	sector_t origin_size;
 	dm_thin_id dev_id;
 
 	struct pool *pool;
@@ -554,11 +555,16 @@
 struct dm_thin_new_mapping {
 	struct list_head list;
 
-	bool quiesced:1;
-	bool prepared:1;
 	bool pass_discard:1;
 	bool definitely_not_shared:1;
 
+	/*
+	 * Track quiescing, copying and zeroing preparation actions.  When this
+	 * counter hits zero the block is prepared and can be inserted into the
+	 * btree.
+	 */
+	atomic_t prepare_actions;
+
 	int err;
 	struct thin_c *tc;
 	dm_block_t virt_block;
@@ -575,43 +581,41 @@
 	bio_end_io_t *saved_bi_end_io;
 };
 
-static void __maybe_add_mapping(struct dm_thin_new_mapping *m)
+static void __complete_mapping_preparation(struct dm_thin_new_mapping *m)
 {
 	struct pool *pool = m->tc->pool;
 
-	if (m->quiesced && m->prepared) {
+	if (atomic_dec_and_test(&m->prepare_actions)) {
 		list_add_tail(&m->list, &pool->prepared_mappings);
 		wake_worker(pool);
 	}
 }
 
-static void copy_complete(int read_err, unsigned long write_err, void *context)
+static void complete_mapping_preparation(struct dm_thin_new_mapping *m)
 {
 	unsigned long flags;
-	struct dm_thin_new_mapping *m = context;
 	struct pool *pool = m->tc->pool;
 
-	m->err = read_err || write_err ? -EIO : 0;
-
 	spin_lock_irqsave(&pool->lock, flags);
-	m->prepared = true;
-	__maybe_add_mapping(m);
+	__complete_mapping_preparation(m);
 	spin_unlock_irqrestore(&pool->lock, flags);
 }
 
+static void copy_complete(int read_err, unsigned long write_err, void *context)
+{
+	struct dm_thin_new_mapping *m = context;
+
+	m->err = read_err || write_err ? -EIO : 0;
+	complete_mapping_preparation(m);
+}
+
 static void overwrite_endio(struct bio *bio, int err)
 {
-	unsigned long flags;
 	struct dm_thin_endio_hook *h = dm_per_bio_data(bio, sizeof(struct dm_thin_endio_hook));
 	struct dm_thin_new_mapping *m = h->overwrite_mapping;
-	struct pool *pool = m->tc->pool;
 
 	m->err = err;
-
-	spin_lock_irqsave(&pool->lock, flags);
-	m->prepared = true;
-	__maybe_add_mapping(m);
-	spin_unlock_irqrestore(&pool->lock, flags);
+	complete_mapping_preparation(m);
 }
 
 /*----------------------------------------------------------------*/
@@ -821,10 +825,31 @@
 	return m;
 }
 
+static void ll_zero(struct thin_c *tc, struct dm_thin_new_mapping *m,
+		    sector_t begin, sector_t end)
+{
+	int r;
+	struct dm_io_region to;
+
+	to.bdev = tc->pool_dev->bdev;
+	to.sector = begin;
+	to.count = end - begin;
+
+	r = dm_kcopyd_zero(tc->pool->copier, 1, &to, 0, copy_complete, m);
+	if (r < 0) {
+		DMERR_LIMIT("dm_kcopyd_zero() failed");
+		copy_complete(1, 1, m);
+	}
+}
+
+/*
+ * A partial copy also needs to zero the uncopied region.
+ */
 static void schedule_copy(struct thin_c *tc, dm_block_t virt_block,
 			  struct dm_dev *origin, dm_block_t data_origin,
 			  dm_block_t data_dest,
-			  struct dm_bio_prison_cell *cell, struct bio *bio)
+			  struct dm_bio_prison_cell *cell, struct bio *bio,
+			  sector_t len)
 {
 	int r;
 	struct pool *pool = tc->pool;
@@ -835,8 +860,15 @@
 	m->data_block = data_dest;
 	m->cell = cell;
 
+	/*
+	 * quiesce action + copy action + an extra reference held for the
+	 * duration of this function (we may need to inc later for a
+	 * partial zero).
+	 */
+	atomic_set(&m->prepare_actions, 3);
+
 	if (!dm_deferred_set_add_work(pool->shared_read_ds, &m->list))
-		m->quiesced = true;
+		complete_mapping_preparation(m); /* already quiesced */
 
 	/*
 	 * IO to pool_dev remaps to the pool target's data_dev.
@@ -857,20 +889,38 @@
 
 		from.bdev = origin->bdev;
 		from.sector = data_origin * pool->sectors_per_block;
-		from.count = pool->sectors_per_block;
+		from.count = len;
 
 		to.bdev = tc->pool_dev->bdev;
 		to.sector = data_dest * pool->sectors_per_block;
-		to.count = pool->sectors_per_block;
+		to.count = len;
 
 		r = dm_kcopyd_copy(pool->copier, &from, 1, &to,
 				   0, copy_complete, m);
 		if (r < 0) {
-			mempool_free(m, pool->mapping_pool);
 			DMERR_LIMIT("dm_kcopyd_copy() failed");
-			cell_error(pool, cell);
+			copy_complete(1, 1, m);
+
+			/*
+			 * We allow the zero to be issued, to simplify the
+			 * error path.  Otherwise we'd need to start
+			 * worrying about decrementing the prepare_actions
+			 * counter.
+			 */
+		}
+
+		/*
+		 * Do we need to zero a tail region?
+		 */
+		if (len < pool->sectors_per_block && pool->pf.zero_new_blocks) {
+			atomic_inc(&m->prepare_actions);
+			ll_zero(tc, m,
+				data_dest * pool->sectors_per_block + len,
+				(data_dest + 1) * pool->sectors_per_block);
 		}
 	}
+
+	complete_mapping_preparation(m); /* drop our ref */
 }
 
 static void schedule_internal_copy(struct thin_c *tc, dm_block_t virt_block,
@@ -878,15 +928,8 @@
 				   struct dm_bio_prison_cell *cell, struct bio *bio)
 {
 	schedule_copy(tc, virt_block, tc->pool_dev,
-		      data_origin, data_dest, cell, bio);
-}
-
-static void schedule_external_copy(struct thin_c *tc, dm_block_t virt_block,
-				   dm_block_t data_dest,
-				   struct dm_bio_prison_cell *cell, struct bio *bio)
-{
-	schedule_copy(tc, virt_block, tc->origin_dev,
-		      virt_block, data_dest, cell, bio);
+		      data_origin, data_dest, cell, bio,
+		      tc->pool->sectors_per_block);
 }
 
 static void schedule_zero(struct thin_c *tc, dm_block_t virt_block,
@@ -896,8 +939,7 @@
 	struct pool *pool = tc->pool;
 	struct dm_thin_new_mapping *m = get_next_mapping(pool);
 
-	m->quiesced = true;
-	m->prepared = false;
+	atomic_set(&m->prepare_actions, 1); /* no need to quiesce */
 	m->tc = tc;
 	m->virt_block = virt_block;
 	m->data_block = data_block;
@@ -919,21 +961,33 @@
 		save_and_set_endio(bio, &m->saved_bi_end_io, overwrite_endio);
 		inc_all_io_entry(pool, bio);
 		remap_and_issue(tc, bio, data_block);
-	} else {
-		int r;
-		struct dm_io_region to;
 
-		to.bdev = tc->pool_dev->bdev;
-		to.sector = data_block * pool->sectors_per_block;
-		to.count = pool->sectors_per_block;
+	} else
+		ll_zero(tc, m,
+			data_block * pool->sectors_per_block,
+			(data_block + 1) * pool->sectors_per_block);
+}
 
-		r = dm_kcopyd_zero(pool->copier, 1, &to, 0, copy_complete, m);
-		if (r < 0) {
-			mempool_free(m, pool->mapping_pool);
-			DMERR_LIMIT("dm_kcopyd_zero() failed");
-			cell_error(pool, cell);
-		}
-	}
+static void schedule_external_copy(struct thin_c *tc, dm_block_t virt_block,
+				   dm_block_t data_dest,
+				   struct dm_bio_prison_cell *cell, struct bio *bio)
+{
+	struct pool *pool = tc->pool;
+	sector_t virt_block_begin = virt_block * pool->sectors_per_block;
+	sector_t virt_block_end = (virt_block + 1) * pool->sectors_per_block;
+
+	if (virt_block_end <= tc->origin_size)
+		schedule_copy(tc, virt_block, tc->origin_dev,
+			      virt_block, data_dest, cell, bio,
+			      pool->sectors_per_block);
+
+	else if (virt_block_begin < tc->origin_size)
+		schedule_copy(tc, virt_block, tc->origin_dev,
+			      virt_block, data_dest, cell, bio,
+			      tc->origin_size - virt_block_begin);
+
+	else
+		schedule_zero(tc, virt_block, data_dest, cell, bio);
 }
 
 /*
@@ -1315,7 +1369,18 @@
 			inc_all_io_entry(pool, bio);
 			cell_defer_no_holder(tc, cell);
 
-			remap_to_origin_and_issue(tc, bio);
+			if (bio_end_sector(bio) <= tc->origin_size)
+				remap_to_origin_and_issue(tc, bio);
+
+			else if (bio->bi_iter.bi_sector < tc->origin_size) {
+				zero_fill_bio(bio);
+				bio->bi_iter.bi_size = (tc->origin_size - bio->bi_iter.bi_sector) << SECTOR_SHIFT;
+				remap_to_origin_and_issue(tc, bio);
+
+			} else {
+				zero_fill_bio(bio);
+				bio_endio(bio, 0);
+			}
 		} else
 			provision_block(tc, bio, block, cell);
 		break;
@@ -3112,7 +3177,7 @@
 	 */
 	if (io_opt_sectors < pool->sectors_per_block ||
 	    do_div(io_opt_sectors, pool->sectors_per_block)) {
-		blk_limits_io_min(limits, 0);
+		blk_limits_io_min(limits, pool->sectors_per_block << SECTOR_SHIFT);
 		blk_limits_io_opt(limits, pool->sectors_per_block << SECTOR_SHIFT);
 	}
 
@@ -3141,7 +3206,7 @@
 	.name = "thin-pool",
 	.features = DM_TARGET_SINGLETON | DM_TARGET_ALWAYS_WRITEABLE |
 		    DM_TARGET_IMMUTABLE,
-	.version = {1, 12, 0},
+	.version = {1, 13, 0},
 	.module = THIS_MODULE,
 	.ctr = pool_ctr,
 	.dtr = pool_dtr,
@@ -3361,8 +3426,7 @@
 		spin_lock_irqsave(&pool->lock, flags);
 		list_for_each_entry_safe(m, tmp, &work, list) {
 			list_del(&m->list);
-			m->quiesced = true;
-			__maybe_add_mapping(m);
+			__complete_mapping_preparation(m);
 		}
 		spin_unlock_irqrestore(&pool->lock, flags);
 	}
@@ -3401,6 +3465,16 @@
 	noflush_work(tc, do_noflush_stop);
 }
 
+static int thin_preresume(struct dm_target *ti)
+{
+	struct thin_c *tc = ti->private;
+
+	if (tc->origin_dev)
+		tc->origin_size = get_dev_size(tc->origin_dev->bdev);
+
+	return 0;
+}
+
 /*
  * <nr mapped sectors> <highest mapped sector>
  */
@@ -3483,12 +3557,13 @@
 
 static struct target_type thin_target = {
 	.name = "thin",
-	.version = {1, 12, 0},
+	.version = {1, 13, 0},
 	.module	= THIS_MODULE,
 	.ctr = thin_ctr,
 	.dtr = thin_dtr,
 	.map = thin_map,
 	.end_io = thin_endio,
+	.preresume = thin_preresume,
 	.presuspend = thin_presuspend,
 	.postsuspend = thin_postsuspend,
 	.status = thin_status,
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index ed76126..e81d215 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -72,7 +72,6 @@
 unsigned dm_table_get_type(struct dm_table *t);
 struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
 bool dm_table_request_based(struct dm_table *t);
-bool dm_table_supports_discards(struct dm_table *t);
 void dm_table_free_md_mempools(struct dm_table *t);
 struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t);
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 32fc19c..1294238 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5961,7 +5961,7 @@
 	int err = 0;
 
 	if (mddev->pers) {
-		if (!mddev->pers->quiesce)
+		if (!mddev->pers->quiesce || !mddev->thread)
 			return -EBUSY;
 		if (mddev->recovery || mddev->sync_thread)
 			return -EBUSY;
@@ -6263,7 +6263,7 @@
 		rv = update_raid_disks(mddev, info->raid_disks);
 
 	if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) {
-		if (mddev->pers->quiesce == NULL)
+		if (mddev->pers->quiesce == NULL || mddev->thread == NULL)
 			return -EINVAL;
 		if (mddev->recovery || mddev->sync_thread)
 			return -EBUSY;
@@ -7376,7 +7376,7 @@
 	struct mddev *mddev2;
 	unsigned int currspeed = 0,
 		 window;
-	sector_t max_sectors,j, io_sectors;
+	sector_t max_sectors,j, io_sectors, recovery_done;
 	unsigned long mark[SYNC_MARKS];
 	unsigned long update_time;
 	sector_t mark_cnt[SYNC_MARKS];
@@ -7652,7 +7652,8 @@
 		 */
 		cond_resched();
 
-		currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
+		recovery_done = io_sectors - atomic_read(&mddev->recovery_active);
+		currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2
 			/((jiffies-mddev->resync_mark)/HZ +1) +1;
 
 		if (currspeed > speed_min(mddev)) {
@@ -8592,7 +8593,7 @@
 		goto err_mdp;
 	mdp_major = ret;
 
-	blk_register_region(MKDEV(MD_MAJOR, 0), 1UL<<MINORBITS, THIS_MODULE,
+	blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE,
 			    md_probe, NULL, NULL);
 	blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE,
 			    md_probe, NULL, NULL);
@@ -8687,7 +8688,7 @@
 	struct list_head *tmp;
 	int delay = 1;
 
-	blk_unregister_region(MKDEV(MD_MAJOR,0), 1U << MINORBITS);
+	blk_unregister_region(MKDEV(MD_MAJOR,0), 512);
 	blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS);
 
 	unregister_blkdev(MD_MAJOR,"md");
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 407a99e..cf91f59 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -685,6 +685,12 @@
 	 *  raid10 - assuming we have all necessary active disks
 	 *  raid1 - with (N -1) mirror drives faulty
 	 */
+
+	if (mddev->bitmap) {
+		printk(KERN_ERR "md/raid0: %s: cannot takeover array with bitmap\n",
+		       mdname(mddev));
+		return ERR_PTR(-EBUSY);
+	}
 	if (mddev->level == 4)
 		return raid0_takeover_raid45(mddev);
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 56e24c0..d7690f8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1501,12 +1501,12 @@
 		mddev->degraded++;
 		set_bit(Faulty, &rdev->flags);
 		spin_unlock_irqrestore(&conf->device_lock, flags);
-		/*
-		 * if recovery is running, make sure it aborts.
-		 */
-		set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 	} else
 		set_bit(Faulty, &rdev->flags);
+	/*
+	 * if recovery is running, make sure it aborts.
+	 */
+	set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 	set_bit(MD_CHANGE_DEVS, &mddev->flags);
 	printk(KERN_ALERT
 	       "md/raid1:%s: Disk failure on %s, disabling device.\n"
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index cb882aa..b08c188 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1684,13 +1684,12 @@
 		spin_unlock_irqrestore(&conf->device_lock, flags);
 		return;
 	}
-	if (test_and_clear_bit(In_sync, &rdev->flags)) {
+	if (test_and_clear_bit(In_sync, &rdev->flags))
 		mddev->degraded++;
-			/*
-		 * if recovery is running, make sure it aborts.
-		 */
-		set_bit(MD_RECOVERY_INTR, &mddev->recovery);
-	}
+	/*
+	 * If recovery is running, make sure it aborts.
+	 */
+	set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 	set_bit(Blocked, &rdev->flags);
 	set_bit(Faulty, &rdev->flags);
 	set_bit(MD_CHANGE_DEVS, &mddev->flags);
diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c
index 6352bec..71f387c 100644
--- a/drivers/mfd/rtsx_usb.c
+++ b/drivers/mfd/rtsx_usb.c
@@ -744,6 +744,7 @@
 	{ USB_DEVICE(0x0BDA, 0x0140) },
 	{ }
 };
+MODULE_DEVICE_TABLE(usb, rtsx_usb_usb_ids);
 
 static struct usb_driver rtsx_usb_driver = {
 	.name			= "rtsx_usb",
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 452782b..ede41f0 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2028,8 +2028,7 @@
 		/* complete ongoing async transfer before issuing discard */
 		if (card->host->areq)
 			mmc_blk_issue_rw_rq(mq, NULL);
-		if (req->cmd_flags & REQ_SECURE &&
-			!(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
+		if (req->cmd_flags & REQ_SECURE)
 			ret = mmc_blk_issue_secdiscard_rq(mq, req);
 		else
 			ret = mmc_blk_issue_discard_rq(mq, req);
@@ -2432,6 +2431,8 @@
 	if (!(card->csd.cmdclass & CCC_BLOCK_READ))
 		return -ENODEV;
 
+	mmc_fixup_device(card, blk_fixups);
+
 	md = mmc_blk_alloc(card);
 	if (IS_ERR(md))
 		return PTR_ERR(md);
@@ -2446,7 +2447,6 @@
 		goto out;
 
 	mmc_set_drvdata(card, md);
-	mmc_fixup_device(card, blk_fixups);
 
 	if (mmc_add_disk(md))
 		goto out;
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index d2dbf02..8a1f124 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -180,7 +180,6 @@
 #endif
 
 #ifdef CONFIG_PM_RUNTIME
-
 static int mmc_runtime_suspend(struct device *dev)
 {
 	struct mmc_card *card = mmc_dev_to_card(dev);
@@ -196,17 +195,10 @@
 
 	return host->bus_ops->runtime_resume(host);
 }
-
-static int mmc_runtime_idle(struct device *dev)
-{
-	return 0;
-}
-
 #endif /* !CONFIG_PM_RUNTIME */
 
 static const struct dev_pm_ops mmc_bus_pm_ops = {
-	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
-			mmc_runtime_idle)
+	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
 	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
 };
 
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 7dc0c85..d03a080 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2102,7 +2102,8 @@
 
 int mmc_can_secure_erase_trim(struct mmc_card *card)
 {
-	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
+	if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) &&
+	    !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
 		return 1;
 	return 0;
 }
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 793c6f7..1eda8dd 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -324,13 +324,12 @@
 		}
 	}
 
+	/*
+	 * The EXT_CSD format is meant to be forward compatible. As long
+	 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
+	 * are authorized, see JEDEC JESD84-B50 section B.8.
+	 */
 	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
-	if (card->ext_csd.rev > 7) {
-		pr_err("%s: unrecognised EXT_CSD revision %d\n",
-			mmc_hostname(card->host), card->ext_csd.rev);
-		err = -EINVAL;
-		goto out;
-	}
 
 	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c
index 6c36fcc..dd1d1e0 100644
--- a/drivers/mmc/core/quirks.c
+++ b/drivers/mmc/core/quirks.c
@@ -91,7 +91,7 @@
 		    (f->cis_device == card->cis.device ||
 		     f->cis_device == (u16) SDIO_ANY_ID) &&
 		    rev >= f->rev_start && rev <= f->rev_end) {
-			dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
+			dev_dbg(&card->dev, "calling %pf\n", f->vendor_fixup);
 			f->vendor_fixup(card, f->data);
 		}
 	}
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 274ef00..48d0c93 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -184,6 +184,9 @@
 		mmc_delay(10);
 	}
 
+	if (!i)
+		pr_err("%s: card never left busy state\n", mmc_hostname(host));
+
 	if (rocr && !mmc_host_is_spi(host))
 		*rocr = cmd.resp[0];
 
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index a565254..4511358 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -290,6 +290,18 @@
 	  be found on some embedded hardware such as UC-7112-LX.
 	  If you have a controller with this interface, say Y here.
 
+config MMC_SDHCI_ST
+	tristate "SDHCI support on STMicroelectronics SoC"
+	depends on ARCH_STI
+	depends on MMC_SDHCI_PLTFM
+	select MMC_SDHCI_IO_ACCESSORS
+	help
+	  This selects the Secure Digital Host Controller Interface in
+	  STMicroelectronics SoCs.
+
+	  If you have a controller with this interface, say Y or M here.
+	  If unsure, say N.
+
 config MMC_OMAP
 	tristate "TI OMAP Multimedia Card Interface support"
 	depends on ARCH_OMAP
@@ -303,6 +315,7 @@
 
 config MMC_OMAP_HS
 	tristate "TI OMAP High Speed Multimedia Card Interface support"
+	depends on HAS_DMA
 	depends on ARCH_OMAP2PLUS || COMPILE_TEST
 	help
 	  This selects the TI OMAP High Speed Multimedia card Interface.
@@ -343,7 +356,7 @@
 
 config MMC_SDHCI_MSM
 	tristate "Qualcomm SDHCI Controller Support"
-	depends on ARCH_QCOM
+	depends on ARCH_QCOM || (ARM && COMPILE_TEST)
 	depends on MMC_SDHCI_PLTFM
 	help
 	  This selects the Secure Digital Host Controller Interface (SDHCI)
@@ -440,6 +453,7 @@
 config MMC_S3C
 	tristate "Samsung S3C SD/MMC Card Interface support"
 	depends on ARCH_S3C24XX
+	depends on S3C24XX_DMAC
 	help
 	  This selects a driver for the MCI interface found in
           Samsung's S3C2410, S3C2412, S3C2440, S3C2442 CPUs.
@@ -477,15 +491,6 @@
 	  working properly and needs to be debugged before this
 	  option is useful.
 
-config MMC_S3C_PIODMA
-	bool "Support for both PIO and DMA"
-	help
-	  Compile both the PIO and DMA transfer routines into the
-	  driver and let the platform select at run-time which one
-	  is best.
-
-	  See notes for the DMA option.
-
 endchoice
 
 config MMC_SDRICOH_CS
@@ -623,7 +628,7 @@
 
 config MMC_SH_MMCIF
 	tristate "SuperH Internal MMCIF support"
-	depends on MMC_BLOCK
+	depends on MMC_BLOCK && HAS_DMA
 	depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
 	help
 	  This selects the MMC Host Interface controller (MMCIF).
@@ -697,6 +702,7 @@
 
 config MMC_USDHI6ROL0
 	tristate "Renesas USDHI6ROL0 SD/SDIO Host Controller support"
+	depends on HAS_DMA
 	help
 	  This selects support for the Renesas USDHI6ROL0 SD/SDIO
 	  Host Controller
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 7f81ddf..f211eed 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -68,6 +68,7 @@
 obj-$(CONFIG_MMC_SDHCI_BCM_KONA)	+= sdhci-bcm-kona.o
 obj-$(CONFIG_MMC_SDHCI_BCM2835)		+= sdhci-bcm2835.o
 obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-msm.o
+obj-$(CONFIG_MMC_SDHCI_ST)		+= sdhci-st.o
 
 ifeq ($(CONFIG_CB710_DEBUG),y)
 	CFLAGS-cb710-mmc	+= -DDEBUG
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 1ac227c..8f216ed 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -111,8 +111,7 @@
 	0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
 };
 
-static inline bool dw_mci_fifo_reset(struct dw_mci *host);
-static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host);
+static bool dw_mci_reset(struct dw_mci *host);
 
 #if defined(CONFIG_DEBUG_FS)
 static int dw_mci_req_show(struct seq_file *s, void *v)
@@ -997,7 +996,8 @@
 	int gpio_ro = mmc_gpio_get_ro(mmc);
 
 	/* Use platform get_ro function, else try on board write protect */
-	if (slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT)
+	if ((slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT) ||
+			(slot->host->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT))
 		read_only = 0;
 	else if (!IS_ERR_VALUE(gpio_ro))
 		read_only = gpio_ro;
@@ -1235,7 +1235,7 @@
 		 * After an error, there may be data lingering
 		 * in the FIFO
 		 */
-		dw_mci_fifo_reset(host);
+		dw_mci_reset(host);
 	} else {
 		data->bytes_xfered = data->blocks * data->blksz;
 		data->error = 0;
@@ -1352,7 +1352,7 @@
 
 			/* CMD error in data command */
 			if (mrq->cmd->error && mrq->data)
-				dw_mci_fifo_reset(host);
+				dw_mci_reset(host);
 
 			host->cmd = NULL;
 			host->data = NULL;
@@ -1963,14 +1963,8 @@
 			}
 
 			/* Power down slot */
-			if (present == 0) {
-				/* Clear down the FIFO */
-				dw_mci_fifo_reset(host);
-#ifdef CONFIG_MMC_DW_IDMAC
-				dw_mci_idmac_reset(host);
-#endif
-
-			}
+			if (present == 0)
+				dw_mci_reset(host);
 
 			spin_unlock_bh(&host->lock);
 
@@ -2021,8 +2015,11 @@
 
 	/* get quirks */
 	for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++)
-		if (of_get_property(np, of_slot_quirks[idx].quirk, NULL))
+		if (of_get_property(np, of_slot_quirks[idx].quirk, NULL)) {
+			dev_warn(dev, "Slot quirk %s is deprecated\n",
+					of_slot_quirks[idx].quirk);
 			quirks |= of_slot_quirks[idx].id;
+		}
 
 	return quirks;
 }
@@ -2208,8 +2205,11 @@
 	return false;
 }
 
-static inline bool dw_mci_fifo_reset(struct dw_mci *host)
+static bool dw_mci_reset(struct dw_mci *host)
 {
+	u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET;
+	bool ret = false;
+
 	/*
 	 * Reseting generates a block interrupt, hence setting
 	 * the scatter-gather pointer to NULL.
@@ -2219,15 +2219,60 @@
 		host->sg = NULL;
 	}
 
-	return dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET);
-}
+	if (host->use_dma)
+		flags |= SDMMC_CTRL_DMA_RESET;
 
-static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host)
-{
-	return dw_mci_ctrl_reset(host,
-				 SDMMC_CTRL_FIFO_RESET |
-				 SDMMC_CTRL_RESET |
-				 SDMMC_CTRL_DMA_RESET);
+	if (dw_mci_ctrl_reset(host, flags)) {
+		/*
+		 * In all cases we clear the RAWINTS register to clear any
+		 * interrupts.
+		 */
+		mci_writel(host, RINTSTS, 0xFFFFFFFF);
+
+		/* if using dma we wait for dma_req to clear */
+		if (host->use_dma) {
+			unsigned long timeout = jiffies + msecs_to_jiffies(500);
+			u32 status;
+			do {
+				status = mci_readl(host, STATUS);
+				if (!(status & SDMMC_STATUS_DMA_REQ))
+					break;
+				cpu_relax();
+			} while (time_before(jiffies, timeout));
+
+			if (status & SDMMC_STATUS_DMA_REQ) {
+				dev_err(host->dev,
+					"%s: Timeout waiting for dma_req to "
+					"clear during reset\n", __func__);
+				goto ciu_out;
+			}
+
+			/* when using DMA next we reset the fifo again */
+			if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET))
+				goto ciu_out;
+		}
+	} else {
+		/* if the controller reset bit did clear, then set clock regs */
+		if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) {
+			dev_err(host->dev, "%s: fifo/dma reset bits didn't "
+				"clear but ciu was reset, doing clock update\n",
+				__func__);
+			goto ciu_out;
+		}
+	}
+
+#if IS_ENABLED(CONFIG_MMC_DW_IDMAC)
+	/* It is also recommended that we reset and reprogram idmac */
+	dw_mci_idmac_reset(host);
+#endif
+
+	ret = true;
+
+ciu_out:
+	/* After a CTRL reset we need to have CIU set clock registers  */
+	mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0);
+
+	return ret;
 }
 
 #ifdef CONFIG_OF
@@ -2238,6 +2283,9 @@
 	{
 		.quirk	= "broken-cd",
 		.id	= DW_MCI_QUIRK_BROKEN_CARD_DETECTION,
+	}, {
+		.quirk	= "disable-wp",
+		.id	= DW_MCI_QUIRK_NO_WRITE_PROTECT,
 	},
 };
 
@@ -2425,7 +2473,7 @@
 	}
 
 	/* Reset all blocks */
-	if (!dw_mci_ctrl_all_reset(host))
+	if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS))
 		return -ENODEV;
 
 	host->dma_ops = host->pdata->dma_ops;
@@ -2612,7 +2660,7 @@
 		}
 	}
 
-	if (!dw_mci_ctrl_all_reset(host)) {
+	if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) {
 		ret = -ENODEV;
 		return ret;
 	}
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 738fa24..08fd956 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -129,6 +129,7 @@
 #define SDMMC_CMD_INDX(n)		((n) & 0x1F)
 /* Status register defines */
 #define SDMMC_GET_FCNT(x)		(((x)>>17) & 0x1FFF)
+#define SDMMC_STATUS_DMA_REQ		BIT(31)
 /* FIFOTH register defines */
 #define SDMMC_SET_FIFOTH(m, r, t)	(((m) & 0x7) << 28 | \
 					 ((r) & 0xFFF) << 16 | \
@@ -150,6 +151,10 @@
 /* Card read threshold */
 #define SDMMC_SET_RD_THLD(v, x)		(((v) & 0x1FFF) << 16 | (x))
 
+/* All ctrl reset bits */
+#define SDMMC_CTRL_ALL_RESET_FLAGS \
+	(SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET)
+
 /* Register access macros */
 #define mci_readl(dev, reg)			\
 	__raw_readl((dev)->regs + SDMMC_##reg)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 7ad463e..e4d4707 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -52,34 +52,53 @@
  * struct variant_data - MMCI variant-specific quirks
  * @clkreg: default value for MCICLOCK register
  * @clkreg_enable: enable value for MMCICLOCK register
+ * @clkreg_8bit_bus_enable: enable value for 8 bit bus
+ * @clkreg_neg_edge_enable: enable value for inverted data/cmd output
  * @datalength_bits: number of bits in the MMCIDATALENGTH register
  * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY
  *	      is asserted (likewise for RX)
  * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY
  *		  is asserted (likewise for RX)
+ * @data_cmd_enable: enable value for data commands.
  * @sdio: variant supports SDIO
  * @st_clkdiv: true if using a ST-specific clock divider algorithm
+ * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
  * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
+ * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
+ *		     register
  * @pwrreg_powerup: power up value for MMCIPOWER register
+ * @f_max: maximum clk frequency supported by the controller.
  * @signal_direction: input/out direction of bus signals can be indicated
  * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock
  * @busy_detect: true if busy detection on dat0 is supported
  * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply
+ * @explicit_mclk_control: enable explicit mclk control in driver.
+ * @qcom_fifo: enables qcom specific fifo pio read logic.
+ * @reversed_irq_handling: handle data irq before cmd irq.
  */
 struct variant_data {
 	unsigned int		clkreg;
 	unsigned int		clkreg_enable;
+	unsigned int		clkreg_8bit_bus_enable;
+	unsigned int		clkreg_neg_edge_enable;
 	unsigned int		datalength_bits;
 	unsigned int		fifosize;
 	unsigned int		fifohalfsize;
+	unsigned int		data_cmd_enable;
+	unsigned int		datactrl_mask_ddrmode;
 	bool			sdio;
 	bool			st_clkdiv;
 	bool			blksz_datactrl16;
+	bool			blksz_datactrl4;
 	u32			pwrreg_powerup;
+	u32			f_max;
 	bool			signal_direction;
 	bool			pwrreg_clkgate;
 	bool			busy_detect;
 	bool			pwrreg_nopower;
+	bool			explicit_mclk_control;
+	bool			qcom_fifo;
+	bool			reversed_irq_handling;
 };
 
 static struct variant_data variant_arm = {
@@ -87,6 +106,8 @@
 	.fifohalfsize		= 8 * 4,
 	.datalength_bits	= 16,
 	.pwrreg_powerup		= MCI_PWR_UP,
+	.f_max			= 100000000,
+	.reversed_irq_handling	= true,
 };
 
 static struct variant_data variant_arm_extended_fifo = {
@@ -94,6 +115,7 @@
 	.fifohalfsize		= 64 * 4,
 	.datalength_bits	= 16,
 	.pwrreg_powerup		= MCI_PWR_UP,
+	.f_max			= 100000000,
 };
 
 static struct variant_data variant_arm_extended_fifo_hwfc = {
@@ -102,15 +124,18 @@
 	.clkreg_enable		= MCI_ARM_HWFCEN,
 	.datalength_bits	= 16,
 	.pwrreg_powerup		= MCI_PWR_UP,
+	.f_max			= 100000000,
 };
 
 static struct variant_data variant_u300 = {
 	.fifosize		= 16 * 4,
 	.fifohalfsize		= 8 * 4,
 	.clkreg_enable		= MCI_ST_U300_HWFCEN,
+	.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
 	.datalength_bits	= 16,
 	.sdio			= true,
 	.pwrreg_powerup		= MCI_PWR_ON,
+	.f_max			= 100000000,
 	.signal_direction	= true,
 	.pwrreg_clkgate		= true,
 	.pwrreg_nopower		= true,
@@ -124,6 +149,7 @@
 	.sdio			= true,
 	.st_clkdiv		= true,
 	.pwrreg_powerup		= MCI_PWR_ON,
+	.f_max			= 100000000,
 	.signal_direction	= true,
 	.pwrreg_clkgate		= true,
 	.pwrreg_nopower		= true,
@@ -134,10 +160,13 @@
 	.fifohalfsize		= 8 * 4,
 	.clkreg			= MCI_CLK_ENABLE,
 	.clkreg_enable		= MCI_ST_UX500_HWFCEN,
+	.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
+	.clkreg_neg_edge_enable	= MCI_ST_UX500_NEG_EDGE,
 	.datalength_bits	= 24,
 	.sdio			= true,
 	.st_clkdiv		= true,
 	.pwrreg_powerup		= MCI_PWR_ON,
+	.f_max			= 100000000,
 	.signal_direction	= true,
 	.pwrreg_clkgate		= true,
 	.busy_detect		= true,
@@ -149,17 +178,38 @@
 	.fifohalfsize		= 8 * 4,
 	.clkreg			= MCI_CLK_ENABLE,
 	.clkreg_enable		= MCI_ST_UX500_HWFCEN,
+	.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
+	.clkreg_neg_edge_enable	= MCI_ST_UX500_NEG_EDGE,
+	.datactrl_mask_ddrmode	= MCI_ST_DPSM_DDRMODE,
 	.datalength_bits	= 24,
 	.sdio			= true,
 	.st_clkdiv		= true,
 	.blksz_datactrl16	= true,
 	.pwrreg_powerup		= MCI_PWR_ON,
+	.f_max			= 100000000,
 	.signal_direction	= true,
 	.pwrreg_clkgate		= true,
 	.busy_detect		= true,
 	.pwrreg_nopower		= true,
 };
 
+static struct variant_data variant_qcom = {
+	.fifosize		= 16 * 4,
+	.fifohalfsize		= 8 * 4,
+	.clkreg			= MCI_CLK_ENABLE,
+	.clkreg_enable		= MCI_QCOM_CLK_FLOWENA |
+				  MCI_QCOM_CLK_SELECT_IN_FBCLK,
+	.clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,
+	.datactrl_mask_ddrmode	= MCI_QCOM_CLK_SELECT_IN_DDR_MODE,
+	.data_cmd_enable	= MCI_QCOM_CSPM_DATCMD,
+	.blksz_datactrl4	= true,
+	.datalength_bits	= 24,
+	.pwrreg_powerup		= MCI_PWR_UP,
+	.f_max			= 208000000,
+	.explicit_mclk_control	= true,
+	.qcom_fifo		= true,
+};
+
 static int mmci_card_busy(struct mmc_host *mmc)
 {
 	struct mmci_host *host = mmc_priv(mmc);
@@ -260,7 +310,9 @@
 	host->cclk = 0;
 
 	if (desired) {
-		if (desired >= host->mclk) {
+		if (variant->explicit_mclk_control) {
+			host->cclk = host->mclk;
+		} else if (desired >= host->mclk) {
 			clk = MCI_CLK_BYPASS;
 			if (variant->st_clkdiv)
 				clk |= MCI_ST_UX500_NEG_EDGE;
@@ -299,11 +351,11 @@
 	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
 		clk |= MCI_4BIT_BUS;
 	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
-		clk |= MCI_ST_8BIT_BUS;
+		clk |= variant->clkreg_8bit_bus_enable;
 
 	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 ||
 	    host->mmc->ios.timing == MMC_TIMING_MMC_DDR52)
-		clk |= MCI_ST_UX500_NEG_EDGE;
+		clk |= variant->clkreg_neg_edge_enable;
 
 	mmci_write_clkreg(host, clk);
 }
@@ -719,7 +771,7 @@
 	data->bytes_xfered = 0;
 
 	clks = (unsigned long long)data->timeout_ns * host->cclk;
-	do_div(clks, 1000000000UL);
+	do_div(clks, NSEC_PER_SEC);
 
 	timeout = data->timeout_clks + (unsigned int)clks;
 
@@ -732,6 +784,8 @@
 
 	if (variant->blksz_datactrl16)
 		datactrl = MCI_DPSM_ENABLE | (data->blksz << 16);
+	else if (variant->blksz_datactrl4)
+		datactrl = MCI_DPSM_ENABLE | (data->blksz << 4);
 	else
 		datactrl = MCI_DPSM_ENABLE | blksz_bits << 4;
 
@@ -767,7 +821,7 @@
 
 	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 ||
 	    host->mmc->ios.timing == MMC_TIMING_MMC_DDR52)
-		datactrl |= MCI_ST_DPSM_DDRMODE;
+		datactrl |= variant->datactrl_mask_ddrmode;
 
 	/*
 	 * Attempt to use DMA operation mode, if this
@@ -812,7 +866,7 @@
 
 	if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) {
 		writel(0, base + MMCICOMMAND);
-		udelay(1);
+		mmci_reg_delay(host);
 	}
 
 	c |= cmd->opcode | MCI_CPSM_ENABLE;
@@ -824,6 +878,9 @@
 	if (/*interrupt*/0)
 		c |= MCI_CPSM_INTERRUPT;
 
+	if (mmc_cmd_type(cmd) == MMC_CMD_ADTC)
+		c |= host->variant->data_cmd_enable;
+
 	host->cmd = cmd;
 
 	writel(cmd->arg, base + MMCIARGUMENT);
@@ -834,6 +891,10 @@
 mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
 	      unsigned int status)
 {
+	/* Make sure we have data to handle */
+	if (!data)
+		return;
+
 	/* First check for errors */
 	if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR|
 		      MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
@@ -902,9 +963,17 @@
 	     unsigned int status)
 {
 	void __iomem *base = host->base;
-	bool sbc = (cmd == host->mrq->sbc);
-	bool busy_resp = host->variant->busy_detect &&
-			(cmd->flags & MMC_RSP_BUSY);
+	bool sbc, busy_resp;
+
+	if (!cmd)
+		return;
+
+	sbc = (cmd == host->mrq->sbc);
+	busy_resp = host->variant->busy_detect && (cmd->flags & MMC_RSP_BUSY);
+
+	if (!((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|
+		MCI_CMDSENT|MCI_CMDRESPEND)))
+		return;
 
 	/* Check if we need to wait for busy completion. */
 	if (host->busy_status && (status & MCI_ST_CARDBUSY))
@@ -957,15 +1026,34 @@
 	}
 }
 
+static int mmci_get_rx_fifocnt(struct mmci_host *host, u32 status, int remain)
+{
+	return remain - (readl(host->base + MMCIFIFOCNT) << 2);
+}
+
+static int mmci_qcom_get_rx_fifocnt(struct mmci_host *host, u32 status, int r)
+{
+	/*
+	 * on qcom SDCC4 only 8 words are used in each burst so only 8 addresses
+	 * from the fifo range should be used
+	 */
+	if (status & MCI_RXFIFOHALFFULL)
+		return host->variant->fifohalfsize;
+	else if (status & MCI_RXDATAAVLBL)
+		return 4;
+
+	return 0;
+}
+
 static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
 {
 	void __iomem *base = host->base;
 	char *ptr = buffer;
-	u32 status;
+	u32 status = readl(host->base + MMCISTATUS);
 	int host_remain = host->size;
 
 	do {
-		int count = host_remain - (readl(base + MMCIFIFOCNT) << 2);
+		int count = host->get_rx_fifocnt(host, status, host_remain);
 
 		if (count > remain)
 			count = remain;
@@ -1132,9 +1220,6 @@
 	spin_lock(&host->lock);
 
 	do {
-		struct mmc_command *cmd;
-		struct mmc_data *data;
-
 		status = readl(host->base + MMCISTATUS);
 
 		if (host->singleirq) {
@@ -1154,16 +1239,13 @@
 
 		dev_dbg(mmc_dev(host->mmc), "irq0 (data+cmd) %08x\n", status);
 
-		cmd = host->cmd;
-		if ((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|
-			MCI_CMDSENT|MCI_CMDRESPEND) && cmd)
-			mmci_cmd_irq(host, cmd, status);
-
-		data = host->data;
-		if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR|
-			      MCI_TXUNDERRUN|MCI_RXOVERRUN|MCI_DATAEND|
-			      MCI_DATABLOCKEND) && data)
-			mmci_data_irq(host, data, status);
+		if (host->variant->reversed_irq_handling) {
+			mmci_data_irq(host, host->data, status);
+			mmci_cmd_irq(host, host->cmd, status);
+		} else {
+			mmci_cmd_irq(host, host->cmd, status);
+			mmci_data_irq(host, host->data, status);
+		}
 
 		/* Don't poll for busy completion in irq context. */
 		if (host->busy_status)
@@ -1296,6 +1378,17 @@
 	if (!ios->clock && variant->pwrreg_clkgate)
 		pwr &= ~MCI_PWR_ON;
 
+	if (host->variant->explicit_mclk_control &&
+	    ios->clock != host->clock_cache) {
+		ret = clk_set_rate(host->clk, ios->clock);
+		if (ret < 0)
+			dev_err(mmc_dev(host->mmc),
+				"Error setting clock rate (%d)\n", ret);
+		else
+			host->mclk = clk_get_rate(host->clk);
+	}
+	host->clock_cache = ios->clock;
+
 	spin_lock_irqsave(&host->lock, flags);
 
 	mmci_set_clkreg(host, ios->clock);
@@ -1443,6 +1536,11 @@
 	if (ret)
 		goto host_free;
 
+	if (variant->qcom_fifo)
+		host->get_rx_fifocnt = mmci_qcom_get_rx_fifocnt;
+	else
+		host->get_rx_fifocnt = mmci_get_rx_fifocnt;
+
 	host->plat = plat;
 	host->variant = variant;
 	host->mclk = clk_get_rate(host->clk);
@@ -1451,8 +1549,8 @@
 	 * so we try to adjust the clock down to this,
 	 * (if possible).
 	 */
-	if (host->mclk > 100000000) {
-		ret = clk_set_rate(host->clk, 100000000);
+	if (host->mclk > variant->f_max) {
+		ret = clk_set_rate(host->clk, variant->f_max);
 		if (ret < 0)
 			goto clk_disable;
 		host->mclk = clk_get_rate(host->clk);
@@ -1471,9 +1569,12 @@
 	 * The ARM and ST versions of the block have slightly different
 	 * clock divider equations which means that the minimum divider
 	 * differs too.
+	 * on Qualcomm like controllers get the nearest minimum clock to 100Khz
 	 */
 	if (variant->st_clkdiv)
 		mmc->f_min = DIV_ROUND_UP(host->mclk, 257);
+	else if (variant->explicit_mclk_control)
+		mmc->f_min = clk_round_rate(host->clk, 100000);
 	else
 		mmc->f_min = DIV_ROUND_UP(host->mclk, 512);
 	/*
@@ -1483,9 +1584,14 @@
 	 * the block, of course.
 	 */
 	if (mmc->f_max)
-		mmc->f_max = min(host->mclk, mmc->f_max);
+		mmc->f_max = variant->explicit_mclk_control ?
+				min(variant->f_max, mmc->f_max) :
+				min(host->mclk, mmc->f_max);
 	else
-		mmc->f_max = min(host->mclk, fmax);
+		mmc->f_max = variant->explicit_mclk_control ?
+				fmax : min(host->mclk, fmax);
+
+
 	dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max);
 
 	/* Get regulators and the supported OCR mask */
@@ -1752,6 +1858,12 @@
 		.mask   = 0xf0ffffff,
 		.data	= &variant_ux500v2,
 	},
+	/* Qualcomm variants */
+	{
+		.id     = 0x00051180,
+		.mask	= 0x000fffff,
+		.data	= &variant_qcom,
+	},
 	{ 0, 0 },
 };
 
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 347d942..a1f5e4f 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -41,6 +41,15 @@
 /* Modified PL180 on Versatile Express platform */
 #define MCI_ARM_HWFCEN		(1 << 12)
 
+/* Modified on Qualcomm Integrations */
+#define MCI_QCOM_CLK_WIDEBUS_8	(BIT(10) | BIT(11))
+#define MCI_QCOM_CLK_FLOWENA	BIT(12)
+#define MCI_QCOM_CLK_INVERTOUT	BIT(13)
+
+/* select in latch data and command in */
+#define MCI_QCOM_CLK_SELECT_IN_FBCLK	BIT(15)
+#define MCI_QCOM_CLK_SELECT_IN_DDR_MODE	(BIT(14) | BIT(15))
+
 #define MMCIARGUMENT		0x008
 #define MMCICOMMAND		0x00c
 #define MCI_CPSM_RESPONSE	(1 << 6)
@@ -54,6 +63,14 @@
 #define MCI_ST_NIEN		(1 << 13)
 #define MCI_ST_CE_ATACMD	(1 << 14)
 
+/* Modified on Qualcomm Integrations */
+#define MCI_QCOM_CSPM_DATCMD		BIT(12)
+#define MCI_QCOM_CSPM_MCIABORT		BIT(13)
+#define MCI_QCOM_CSPM_CCSENABLE		BIT(14)
+#define MCI_QCOM_CSPM_CCSDISABLE	BIT(15)
+#define MCI_QCOM_CSPM_AUTO_CMD19	BIT(16)
+#define MCI_QCOM_CSPM_AUTO_CMD21	BIT(21)
+
 #define MMCIRESPCMD		0x010
 #define MMCIRESPONSE0		0x014
 #define MMCIRESPONSE1		0x018
@@ -191,6 +208,8 @@
 	spinlock_t		lock;
 
 	unsigned int		mclk;
+	/* cached value of requested clk in set_ios */
+	unsigned int		clock_cache;
 	unsigned int		cclk;
 	u32			pwr_reg;
 	u32			pwr_reg_add;
@@ -210,6 +229,7 @@
 	/* pio stuff */
 	struct sg_mapping_iter	sg_miter;
 	unsigned int		size;
+	int (*get_rx_fifocnt)(struct mmci_host *h, u32 status, int remain);
 
 #ifdef CONFIG_DMA_ENGINE
 	/* DMA stuff */
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
index 74924a0..b4b1efb 100644
--- a/drivers/mmc/host/moxart-mmc.c
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -13,7 +13,6 @@
  * warranty of any kind, whether express or implied.
  */
 
-#include <linux/version.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index babfea0..140885a 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -86,7 +86,8 @@
 	if (ret >= 0)
 		return ret;
 
-	present = !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
+	present = mmc->caps & MMC_CAP_NEEDS_POLL ||
+		!(readl(ssp->base + HW_SSP_STATUS(ssp)) &
 			BM_SSP_STATUS_CARD_DETECT);
 
 	if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 6b7b755..9656726 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -29,6 +29,7 @@
 #include <linux/timer.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 #include <linux/of_gpio.h>
 #include <linux/of_device.h>
 #include <linux/omap-dmaengine.h>
@@ -36,6 +37,7 @@
 #include <linux/mmc/core.h>
 #include <linux/mmc/mmc.h>
 #include <linux/io.h>
+#include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pinctrl/consumer.h>
@@ -54,6 +56,7 @@
 #define OMAP_HSMMC_RSP54	0x0118
 #define OMAP_HSMMC_RSP76	0x011C
 #define OMAP_HSMMC_DATA		0x0120
+#define OMAP_HSMMC_PSTATE	0x0124
 #define OMAP_HSMMC_HCTL		0x0128
 #define OMAP_HSMMC_SYSCTL	0x012C
 #define OMAP_HSMMC_STAT		0x0130
@@ -91,7 +94,10 @@
 #define BCE			(1 << 1)
 #define FOUR_BIT		(1 << 1)
 #define HSPE			(1 << 2)
+#define IWE			(1 << 24)
 #define DDR			(1 << 19)
+#define CLKEXTFREE		(1 << 16)
+#define CTPL			(1 << 11)
 #define DW8			(1 << 5)
 #define OD			0x1
 #define STAT_CLEAR		0xFFFFFFFF
@@ -101,11 +107,15 @@
 #define SRD			(1 << 26)
 #define SOFTRESET		(1 << 1)
 
+/* PSTATE */
+#define DLEV_DAT(x)		(1 << (20 + (x)))
+
 /* Interrupt masks for IE and ISE register */
 #define CC_EN			(1 << 0)
 #define TC_EN			(1 << 1)
 #define BWR_EN			(1 << 4)
 #define BRR_EN			(1 << 5)
+#define CIRQ_EN			(1 << 8)
 #define ERR_EN			(1 << 15)
 #define CTO_EN			(1 << 16)
 #define CCRC_EN			(1 << 17)
@@ -140,7 +150,6 @@
 #define VDD_3V0			3000000		/* 300000 uV */
 #define VDD_165_195		(ffs(MMC_VDD_165_195) - 1)
 
-#define AUTO_CMD23		(1 << 1)	/* Auto CMD23 support */
 /*
  * One controller can have multiple slots, like on some omap boards using
  * omap.c controller driver. Luckily this is not currently done on any known
@@ -194,6 +203,7 @@
 	u32			sysctl;
 	u32			capa;
 	int			irq;
+	int			wake_irq;
 	int			use_dma, dma_ch;
 	struct dma_chan		*tx_chan;
 	struct dma_chan		*rx_chan;
@@ -206,6 +216,9 @@
 	int			req_in_progress;
 	unsigned long		clk_rate;
 	unsigned int		flags;
+#define AUTO_CMD23		(1 << 0)        /* Auto CMD23 support */
+#define HSMMC_SDIO_IRQ_ENABLED	(1 << 1)        /* SDIO irq enabled */
+#define HSMMC_WAKE_IRQ_ENABLED	(1 << 2)
 	struct omap_hsmmc_next	next_data;
 	struct	omap_mmc_platform_data	*pdata;
 };
@@ -510,27 +523,40 @@
 static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host,
 				  struct mmc_command *cmd)
 {
-	unsigned int irq_mask;
+	u32 irq_mask = INT_EN_MASK;
+	unsigned long flags;
 
 	if (host->use_dma)
-		irq_mask = INT_EN_MASK & ~(BRR_EN | BWR_EN);
-	else
-		irq_mask = INT_EN_MASK;
+		irq_mask &= ~(BRR_EN | BWR_EN);
 
 	/* Disable timeout for erases */
 	if (cmd->opcode == MMC_ERASE)
 		irq_mask &= ~DTO_EN;
 
+	spin_lock_irqsave(&host->irq_lock, flags);
 	OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
 	OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
+
+	/* latch pending CIRQ, but don't signal MMC core */
+	if (host->flags & HSMMC_SDIO_IRQ_ENABLED)
+		irq_mask |= CIRQ_EN;
 	OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
+	spin_unlock_irqrestore(&host->irq_lock, flags);
 }
 
 static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
 {
-	OMAP_HSMMC_WRITE(host->base, ISE, 0);
-	OMAP_HSMMC_WRITE(host->base, IE, 0);
+	u32 irq_mask = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->irq_lock, flags);
+	/* no transfer running but need to keep cirq if enabled */
+	if (host->flags & HSMMC_SDIO_IRQ_ENABLED)
+		irq_mask |= CIRQ_EN;
+	OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
+	OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
 	OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
+	spin_unlock_irqrestore(&host->irq_lock, flags);
 }
 
 /* Calculate divisor for the given clock frequency */
@@ -667,6 +693,9 @@
 		capa = VS18;
 	}
 
+	if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
+		hctl |= IWE;
+
 	OMAP_HSMMC_WRITE(host->base, HCTL,
 			OMAP_HSMMC_READ(host->base, HCTL) | hctl);
 
@@ -681,7 +710,9 @@
 		&& time_before(jiffies, timeout))
 		;
 
-	omap_hsmmc_disable_irq(host);
+	OMAP_HSMMC_WRITE(host->base, ISE, 0);
+	OMAP_HSMMC_WRITE(host->base, IE, 0);
+	OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
 
 	/* Do not initialize card-specific things if the power is off */
 	if (host->power_mode == MMC_POWER_OFF)
@@ -1118,8 +1149,12 @@
 	int status;
 
 	status = OMAP_HSMMC_READ(host->base, STAT);
-	while (status & INT_EN_MASK && host->req_in_progress) {
-		omap_hsmmc_do_irq(host, status);
+	while (status & (INT_EN_MASK | CIRQ_EN)) {
+		if (host->req_in_progress)
+			omap_hsmmc_do_irq(host, status);
+
+		if (status & CIRQ_EN)
+			mmc_signal_sdio_irq(host->mmc);
 
 		/* Flush posted write */
 		status = OMAP_HSMMC_READ(host->base, STAT);
@@ -1128,6 +1163,22 @@
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t omap_hsmmc_wake_irq(int irq, void *dev_id)
+{
+	struct omap_hsmmc_host *host = dev_id;
+
+	/* cirq is level triggered, disable to avoid infinite loop */
+	spin_lock(&host->irq_lock);
+	if (host->flags & HSMMC_WAKE_IRQ_ENABLED) {
+		disable_irq_nosync(host->wake_irq);
+		host->flags &= ~HSMMC_WAKE_IRQ_ENABLED;
+	}
+	spin_unlock(&host->irq_lock);
+	pm_request_resume(host->dev); /* no use counter */
+
+	return IRQ_HANDLED;
+}
+
 static void set_sd_bus_power(struct omap_hsmmc_host *host)
 {
 	unsigned long i;
@@ -1639,6 +1690,103 @@
 		mmc_slot(host).init_card(card);
 }
 
+static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+	struct omap_hsmmc_host *host = mmc_priv(mmc);
+	u32 irq_mask, con;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->irq_lock, flags);
+
+	con = OMAP_HSMMC_READ(host->base, CON);
+	irq_mask = OMAP_HSMMC_READ(host->base, ISE);
+	if (enable) {
+		host->flags |= HSMMC_SDIO_IRQ_ENABLED;
+		irq_mask |= CIRQ_EN;
+		con |= CTPL | CLKEXTFREE;
+	} else {
+		host->flags &= ~HSMMC_SDIO_IRQ_ENABLED;
+		irq_mask &= ~CIRQ_EN;
+		con &= ~(CTPL | CLKEXTFREE);
+	}
+	OMAP_HSMMC_WRITE(host->base, CON, con);
+	OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
+
+	/*
+	 * if enable, piggy back detection on current request
+	 * but always disable immediately
+	 */
+	if (!host->req_in_progress || !enable)
+		OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
+
+	/* flush posted write */
+	OMAP_HSMMC_READ(host->base, IE);
+
+	spin_unlock_irqrestore(&host->irq_lock, flags);
+}
+
+static int omap_hsmmc_configure_wake_irq(struct omap_hsmmc_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+	int ret;
+
+	/*
+	 * For omaps with wake-up path, wakeirq will be irq from pinctrl and
+	 * for other omaps, wakeirq will be from GPIO (dat line remuxed to
+	 * gpio). wakeirq is needed to detect sdio irq in runtime suspend state
+	 * with functional clock disabled.
+	 */
+	if (!host->dev->of_node || !host->wake_irq)
+		return -ENODEV;
+
+	/* Prevent auto-enabling of IRQ */
+	irq_set_status_flags(host->wake_irq, IRQ_NOAUTOEN);
+	ret = devm_request_irq(host->dev, host->wake_irq, omap_hsmmc_wake_irq,
+			       IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+			       mmc_hostname(mmc), host);
+	if (ret) {
+		dev_err(mmc_dev(host->mmc), "Unable to request wake IRQ\n");
+		goto err;
+	}
+
+	/*
+	 * Some omaps don't have wake-up path from deeper idle states
+	 * and need to remux SDIO DAT1 to GPIO for wake-up from idle.
+	 */
+	if (host->pdata->controller_flags & OMAP_HSMMC_SWAKEUP_MISSING) {
+		struct pinctrl *p = devm_pinctrl_get(host->dev);
+		if (!p) {
+			ret = -ENODEV;
+			goto err_free_irq;
+		}
+		if (IS_ERR(pinctrl_lookup_state(p, PINCTRL_STATE_DEFAULT))) {
+			dev_info(host->dev, "missing default pinctrl state\n");
+			devm_pinctrl_put(p);
+			ret = -EINVAL;
+			goto err_free_irq;
+		}
+
+		if (IS_ERR(pinctrl_lookup_state(p, PINCTRL_STATE_IDLE))) {
+			dev_info(host->dev, "missing idle pinctrl state\n");
+			devm_pinctrl_put(p);
+			ret = -EINVAL;
+			goto err_free_irq;
+		}
+		devm_pinctrl_put(p);
+	}
+
+	OMAP_HSMMC_WRITE(host->base, HCTL,
+			 OMAP_HSMMC_READ(host->base, HCTL) | IWE);
+	return 0;
+
+err_free_irq:
+	devm_free_irq(host->dev, host->wake_irq, host);
+err:
+	dev_warn(host->dev, "no SDIO IRQ support, falling back to polling\n");
+	host->wake_irq = 0;
+	return ret;
+}
+
 static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
 {
 	u32 hctl, capa, value;
@@ -1691,7 +1839,7 @@
 	.get_cd = omap_hsmmc_get_cd,
 	.get_ro = omap_hsmmc_get_ro,
 	.init_card = omap_hsmmc_init_card,
-	/* NYET -- enable_sdio_irq */
+	.enable_sdio_irq = omap_hsmmc_enable_sdio_irq,
 };
 
 #ifdef CONFIG_DEBUG_FS
@@ -1701,13 +1849,23 @@
 	struct mmc_host *mmc = s->private;
 	struct omap_hsmmc_host *host = mmc_priv(mmc);
 
-	seq_printf(s, "mmc%d:\n ctx_loss:\t%d\n\nregs:\n",
-			mmc->index, host->context_loss);
+	seq_printf(s, "mmc%d:\n", mmc->index);
+	seq_printf(s, "sdio irq mode\t%s\n",
+		   (mmc->caps & MMC_CAP_SDIO_IRQ) ? "interrupt" : "polling");
+
+	if (mmc->caps & MMC_CAP_SDIO_IRQ) {
+		seq_printf(s, "sdio irq \t%s\n",
+			   (host->flags & HSMMC_SDIO_IRQ_ENABLED) ?  "enabled"
+			   : "disabled");
+	}
+	seq_printf(s, "ctx_loss:\t%d\n", host->context_loss);
 
 	pm_runtime_get_sync(host->dev);
-
+	seq_puts(s, "\nregs:\n");
 	seq_printf(s, "CON:\t\t0x%08x\n",
 			OMAP_HSMMC_READ(host->base, CON));
+	seq_printf(s, "PSTATE:\t\t0x%08x\n",
+		   OMAP_HSMMC_READ(host->base, PSTATE));
 	seq_printf(s, "HCTL:\t\t0x%08x\n",
 			OMAP_HSMMC_READ(host->base, HCTL));
 	seq_printf(s, "SYSCTL:\t\t0x%08x\n",
@@ -1761,6 +1919,10 @@
 static const struct omap_mmc_of_data omap4_mmc_of_data = {
 	.reg_offset = 0x100,
 };
+static const struct omap_mmc_of_data am33xx_mmc_of_data = {
+	.reg_offset = 0x100,
+	.controller_flags = OMAP_HSMMC_SWAKEUP_MISSING,
+};
 
 static const struct of_device_id omap_mmc_of_match[] = {
 	{
@@ -1777,6 +1939,10 @@
 		.compatible = "ti,omap4-hsmmc",
 		.data = &omap4_mmc_of_data,
 	},
+	{
+		.compatible = "ti,am33xx-hsmmc",
+		.data = &am33xx_mmc_of_data,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, omap_mmc_of_match);
@@ -1850,7 +2016,6 @@
 	const struct of_device_id *match;
 	dma_cap_mask_t mask;
 	unsigned tx_req, rx_req;
-	struct pinctrl *pinctrl;
 	const struct omap_mmc_of_data *data;
 	void __iomem *base;
 
@@ -1913,6 +2078,9 @@
 
 	platform_set_drvdata(pdev, host);
 
+	if (pdev->dev.of_node)
+		host->wake_irq = irq_of_parse_and_map(pdev->dev.of_node, 1);
+
 	mmc->ops	= &omap_hsmmc_ops;
 
 	mmc->f_min = OMAP_MMC_MIN_CLOCK;
@@ -2061,10 +2229,17 @@
 
 	omap_hsmmc_disable_irq(host);
 
-	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
-	if (IS_ERR(pinctrl))
-		dev_warn(&pdev->dev,
-			"pins are not configured from the driver\n");
+	/*
+	 * For now, only support SDIO interrupt if we have a separate
+	 * wake-up interrupt configured from device tree. This is because
+	 * the wake-up interrupt is needed for idle state and some
+	 * platforms need special quirks. And we don't want to add new
+	 * legacy mux platform init code callbacks any longer as we
+	 * are moving to DT based booting anyways.
+	 */
+	ret = omap_hsmmc_configure_wake_irq(host);
+	if (!ret)
+		mmc->caps |= MMC_CAP_SDIO_IRQ;
 
 	omap_hsmmc_protect_card(host);
 
@@ -2170,11 +2345,18 @@
 	pm_runtime_get_sync(host->dev);
 
 	if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) {
-		omap_hsmmc_disable_irq(host);
+		OMAP_HSMMC_WRITE(host->base, ISE, 0);
+		OMAP_HSMMC_WRITE(host->base, IE, 0);
+		OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
 		OMAP_HSMMC_WRITE(host->base, HCTL,
 				OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
 	}
 
+	/* do not wake up due to sdio irq */
+	if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) &&
+	    !(host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ))
+		disable_irq(host->wake_irq);
+
 	if (host->dbclk)
 		clk_disable_unprepare(host->dbclk);
 
@@ -2200,6 +2382,10 @@
 
 	omap_hsmmc_protect_card(host);
 
+	if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) &&
+	    !(host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ))
+		enable_irq(host->wake_irq);
+
 	pm_runtime_mark_last_busy(host->dev);
 	pm_runtime_put_autosuspend(host->dev);
 	return 0;
@@ -2215,22 +2401,77 @@
 static int omap_hsmmc_runtime_suspend(struct device *dev)
 {
 	struct omap_hsmmc_host *host;
+	unsigned long flags;
+	int ret = 0;
 
 	host = platform_get_drvdata(to_platform_device(dev));
 	omap_hsmmc_context_save(host);
 	dev_dbg(dev, "disabled\n");
 
-	return 0;
+	spin_lock_irqsave(&host->irq_lock, flags);
+	if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) &&
+	    (host->flags & HSMMC_SDIO_IRQ_ENABLED)) {
+		/* disable sdio irq handling to prevent race */
+		OMAP_HSMMC_WRITE(host->base, ISE, 0);
+		OMAP_HSMMC_WRITE(host->base, IE, 0);
+
+		if (!(OMAP_HSMMC_READ(host->base, PSTATE) & DLEV_DAT(1))) {
+			/*
+			 * dat1 line low, pending sdio irq
+			 * race condition: possible irq handler running on
+			 * multi-core, abort
+			 */
+			dev_dbg(dev, "pending sdio irq, abort suspend\n");
+			OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
+			OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN);
+			OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN);
+			pm_runtime_mark_last_busy(dev);
+			ret = -EBUSY;
+			goto abort;
+		}
+
+		pinctrl_pm_select_idle_state(dev);
+
+		WARN_ON(host->flags & HSMMC_WAKE_IRQ_ENABLED);
+		enable_irq(host->wake_irq);
+		host->flags |= HSMMC_WAKE_IRQ_ENABLED;
+	} else {
+		pinctrl_pm_select_idle_state(dev);
+	}
+
+abort:
+	spin_unlock_irqrestore(&host->irq_lock, flags);
+	return ret;
 }
 
 static int omap_hsmmc_runtime_resume(struct device *dev)
 {
 	struct omap_hsmmc_host *host;
+	unsigned long flags;
 
 	host = platform_get_drvdata(to_platform_device(dev));
 	omap_hsmmc_context_restore(host);
 	dev_dbg(dev, "enabled\n");
 
+	spin_lock_irqsave(&host->irq_lock, flags);
+	if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) &&
+	    (host->flags & HSMMC_SDIO_IRQ_ENABLED)) {
+		/* sdio irq flag can't change while in runtime suspend */
+		if (host->flags & HSMMC_WAKE_IRQ_ENABLED) {
+			disable_irq_nosync(host->wake_irq);
+			host->flags &= ~HSMMC_WAKE_IRQ_ENABLED;
+		}
+
+		pinctrl_pm_select_default_state(host->dev);
+
+		/* irq lost, if pinmux incorrect */
+		OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
+		OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN);
+		OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN);
+	} else {
+		pinctrl_pm_select_default_state(host->dev);
+	}
+	spin_unlock_irqrestore(&host->irq_lock, flags);
 	return 0;
 }
 
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index f237826..e5516a2 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
 #include <linux/mmc/host.h>
@@ -27,6 +28,7 @@
 #include <mach/dma.h>
 #include <mach/gpio-samsung.h>
 
+#include <linux/platform_data/dma-s3c24xx.h>
 #include <linux/platform_data/mmc-s3cmci.h>
 
 #include "s3cmci.h"
@@ -140,10 +142,6 @@
 		dev_dbg(&host->pdev->dev, args);  \
 	} while (0)
 
-static struct s3c2410_dma_client s3cmci_dma_client = {
-	.name		= "s3c-mci",
-};
-
 static void finalize_request(struct s3cmci_host *host);
 static void s3cmci_send_request(struct mmc_host *mmc);
 static void s3cmci_reset(struct s3cmci_host *host);
@@ -256,25 +254,8 @@
 {
 #ifdef CONFIG_MMC_S3C_PIO
 	return false;
-#elif defined(CONFIG_MMC_S3C_DMA)
+#else /* CONFIG_MMC_S3C_DMA */
 	return true;
-#else
-	return host->dodma;
-#endif
-}
-
-/**
- * s3cmci_host_canpio - return true if host has pio code available
- *
- * Return true if the driver has been compiled with the PIO support code
- * available.
- */
-static inline bool s3cmci_host_canpio(void)
-{
-#ifdef CONFIG_MMC_S3C_PIO
-	return true;
-#else
-	return false;
 #endif
 }
 
@@ -841,60 +822,24 @@
 	return IRQ_HANDLED;
 }
 
-static void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch,
-				     void *buf_id, int size,
-				     enum s3c2410_dma_buffresult result)
+static void s3cmci_dma_done_callback(void *arg)
 {
-	struct s3cmci_host *host = buf_id;
+	struct s3cmci_host *host = arg;
 	unsigned long iflags;
-	u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt;
-
-	mci_csta = readl(host->base + S3C2410_SDICMDSTAT);
-	mci_dsta = readl(host->base + S3C2410_SDIDSTA);
-	mci_fsta = readl(host->base + S3C2410_SDIFSTA);
-	mci_dcnt = readl(host->base + S3C2410_SDIDCNT);
 
 	BUG_ON(!host->mrq);
 	BUG_ON(!host->mrq->data);
-	BUG_ON(!host->dmatogo);
 
 	spin_lock_irqsave(&host->complete_lock, iflags);
 
-	if (result != S3C2410_RES_OK) {
-		dbg(host, dbg_fail, "DMA FAILED: csta=0x%08x dsta=0x%08x "
-			"fsta=0x%08x dcnt:0x%08x result:0x%08x toGo:%u\n",
-			mci_csta, mci_dsta, mci_fsta,
-			mci_dcnt, result, host->dmatogo);
-
-		goto fail_request;
-	}
-
-	host->dmatogo--;
-	if (host->dmatogo) {
-		dbg(host, dbg_dma, "DMA DONE  Size:%i DSTA:[%08x] "
-			"DCNT:[%08x] toGo:%u\n",
-			size, mci_dsta, mci_dcnt, host->dmatogo);
-
-		goto out;
-	}
-
-	dbg(host, dbg_dma, "DMA FINISHED Size:%i DSTA:%08x DCNT:%08x\n",
-		size, mci_dsta, mci_dcnt);
+	dbg(host, dbg_dma, "DMA FINISHED\n");
 
 	host->dma_complete = 1;
 	host->complete_what = COMPLETION_FINALIZE;
 
-out:
 	tasklet_schedule(&host->pio_tasklet);
 	spin_unlock_irqrestore(&host->complete_lock, iflags);
-	return;
 
-fail_request:
-	host->mrq->data->error = -EINVAL;
-	host->complete_what = COMPLETION_FINALIZE;
-	clear_imask(host);
-
-	goto out;
 }
 
 static void finalize_request(struct s3cmci_host *host)
@@ -966,7 +911,7 @@
 	 * DMA channel and the fifo to clear out any garbage. */
 	if (mrq->data->error != 0) {
 		if (s3cmci_host_usedma(host))
-			s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
+			dmaengine_terminate_all(host->dma);
 
 		if (host->is2440) {
 			/* Clear failure register and reset fifo. */
@@ -992,29 +937,6 @@
 	mmc_request_done(host->mmc, mrq);
 }
 
-static void s3cmci_dma_setup(struct s3cmci_host *host,
-			     enum dma_data_direction source)
-{
-	static enum dma_data_direction last_source = -1;
-	static int setup_ok;
-
-	if (last_source == source)
-		return;
-
-	last_source = source;
-
-	s3c2410_dma_devconfig(host->dma, source,
-			      host->mem->start + host->sdidata);
-
-	if (!setup_ok) {
-		s3c2410_dma_config(host->dma, 4);
-		s3c2410_dma_set_buffdone_fn(host->dma,
-					    s3cmci_dma_done_callback);
-		s3c2410_dma_setflags(host->dma, S3C2410_DMAF_AUTOSTART);
-		setup_ok = 1;
-	}
-}
-
 static void s3cmci_send_command(struct s3cmci_host *host,
 					struct mmc_command *cmd)
 {
@@ -1162,43 +1084,45 @@
 
 static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
 {
-	int dma_len, i;
 	int rw = data->flags & MMC_DATA_WRITE;
+	struct dma_async_tx_descriptor *desc;
+	struct dma_slave_config conf = {
+		.src_addr = host->mem->start + host->sdidata,
+		.dst_addr = host->mem->start + host->sdidata,
+		.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+		.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+	};
 
 	BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
 
-	s3cmci_dma_setup(host, rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-	s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
+	/* Restore prescaler value */
+	writel(host->prescaler, host->base + S3C2410_SDIPRE);
 
-	dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+	if (!rw)
+		conf.direction = DMA_DEV_TO_MEM;
+	else
+		conf.direction = DMA_MEM_TO_DEV;
+
+	dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
 			     rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
-	if (dma_len == 0)
-		return -ENOMEM;
-
-	host->dma_complete = 0;
-	host->dmatogo = dma_len;
-
-	for (i = 0; i < dma_len; i++) {
-		int res;
-
-		dbg(host, dbg_dma, "enqueue %i: %08x@%u\n", i,
-		    sg_dma_address(&data->sg[i]),
-		    sg_dma_len(&data->sg[i]));
-
-		res = s3c2410_dma_enqueue(host->dma, host,
-					  sg_dma_address(&data->sg[i]),
-					  sg_dma_len(&data->sg[i]));
-
-		if (res) {
-			s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
-			return -EBUSY;
-		}
-	}
-
-	s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_START);
+	dmaengine_slave_config(host->dma, &conf);
+	desc = dmaengine_prep_slave_sg(host->dma, data->sg, data->sg_len,
+		conf.direction,
+		DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
+	if (!desc)
+		goto unmap_exit;
+	desc->callback = s3cmci_dma_done_callback;
+	desc->callback_param = host;
+	dmaengine_submit(desc);
+	dma_async_issue_pending(host->dma);
 
 	return 0;
+
+unmap_exit:
+	dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+			     rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+	return -ENOMEM;
 }
 
 static void s3cmci_send_request(struct mmc_host *mmc)
@@ -1676,10 +1600,6 @@
 	host->complete_what 	= COMPLETION_NONE;
 	host->pio_active 	= XFER_NONE;
 
-#ifdef CONFIG_MMC_S3C_PIODMA
-	host->dodma		= host->pdata->use_dma;
-#endif
-
 	host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!host->mem) {
 		dev_err(&pdev->dev,
@@ -1765,17 +1685,17 @@
 	/* depending on the dma state, get a dma channel to use. */
 
 	if (s3cmci_host_usedma(host)) {
-		host->dma = s3c2410_dma_request(DMACH_SDI, &s3cmci_dma_client,
-						host);
-		if (host->dma < 0) {
+		dma_cap_mask_t mask;
+
+		dma_cap_zero(mask);
+		dma_cap_set(DMA_SLAVE, mask);
+
+		host->dma = dma_request_slave_channel_compat(mask,
+			s3c24xx_dma_filter, (void *)DMACH_SDI, &pdev->dev, "rx-tx");
+		if (!host->dma) {
 			dev_err(&pdev->dev, "cannot get DMA channel.\n");
-			if (!s3cmci_host_canpio()) {
-				ret = -EBUSY;
-				goto probe_free_gpio_wp;
-			} else {
-				dev_warn(&pdev->dev, "falling back to PIO.\n");
-				host->dodma = 0;
-			}
+			ret = -EBUSY;
+			goto probe_free_gpio_wp;
 		}
 	}
 
@@ -1787,7 +1707,7 @@
 		goto probe_free_dma;
 	}
 
-	ret = clk_enable(host->clk);
+	ret = clk_prepare_enable(host->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to enable clock source.\n");
 		goto clk_free;
@@ -1816,7 +1736,7 @@
 	mmc->max_segs		= 128;
 
 	dbg(host, dbg_debug,
-	    "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%u.\n",
+	    "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%p.\n",
 	    (host->is2440?"2440":""),
 	    host->base, host->irq, host->irq_cd, host->dma);
 
@@ -1845,14 +1765,14 @@
 	s3cmci_cpufreq_deregister(host);
 
  free_dmabuf:
-	clk_disable(host->clk);
+	clk_disable_unprepare(host->clk);
 
  clk_free:
 	clk_put(host->clk);
 
  probe_free_dma:
 	if (s3cmci_host_usedma(host))
-		s3c2410_dma_free(host->dma, &s3cmci_dma_client);
+		dma_release_channel(host->dma);
 
  probe_free_gpio_wp:
 	if (!host->pdata->no_wprotect)
@@ -1897,7 +1817,7 @@
 	s3cmci_debugfs_remove(host);
 	s3cmci_cpufreq_deregister(host);
 	mmc_remove_host(mmc);
-	clk_disable(host->clk);
+	clk_disable_unprepare(host->clk);
 }
 
 static int s3cmci_remove(struct platform_device *pdev)
@@ -1914,7 +1834,7 @@
 	tasklet_disable(&host->pio_tasklet);
 
 	if (s3cmci_host_usedma(host))
-		s3c2410_dma_free(host->dma, &s3cmci_dma_client);
+		dma_release_channel(host->dma);
 
 	free_irq(host->irq, host);
 
diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h
index c76b53d..cc2e46c 100644
--- a/drivers/mmc/host/s3cmci.h
+++ b/drivers/mmc/host/s3cmci.h
@@ -26,7 +26,7 @@
 	void __iomem		*base;
 	int			irq;
 	int			irq_cd;
-	int			dma;
+	struct dma_chan		*dma;
 
 	unsigned long		clk_rate;
 	unsigned long		clk_div;
@@ -36,8 +36,6 @@
 	int			is2440;
 	unsigned		sdiimsk;
 	unsigned		sdidata;
-	int			dodma;
-	int			dmatogo;
 
 	bool			irq_disabled;
 	bool			irq_enabled;
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 8ce3c28..8c53370 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -124,9 +124,11 @@
 
 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 	.chip    = &sdhci_acpi_chip_int,
-	.caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | MMC_CAP_HW_RESET,
+	.caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
+		   MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR,
 	.caps2   = MMC_CAP2_HC_ERASE_SZ,
 	.flags   = SDHCI_ACPI_RUNTIME_PM,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
 };
 
 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 40573a5..1a6661e 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -16,7 +16,6 @@
 
 #include <linux/module.h>
 #include <linux/of_device.h>
-#include <linux/regulator/consumer.h>
 #include <linux/delay.h>
 #include <linux/mmc/mmc.h>
 #include <linux/slab.h>
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 52c42fc..c3a1deb 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -103,6 +103,10 @@
 			  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
 };
 
+static const struct sdhci_pci_fixes sdhci_intel_qrk = {
+	.quirks		= SDHCI_QUIRK_NO_HISPD_BIT,
+};
+
 static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
 {
 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
@@ -264,7 +268,7 @@
 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
 {
 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
-				 MMC_CAP_HW_RESET;
+				 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR;
 	slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
 	slot->hw_reset = sdhci_pci_int_hw_reset;
 	return 0;
@@ -279,6 +283,7 @@
 static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
 	.allow_runtime_pm = true,
 	.probe_slot	= byt_emmc_probe_slot,
+	.quirks2	= SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
 };
 
 static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
@@ -753,6 +758,14 @@
 
 	{
 		.vendor		= PCI_VENDOR_ID_INTEL,
+		.device		= PCI_DEVICE_ID_INTEL_QRK_SD,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.driver_data	= (kernel_ulong_t)&sdhci_intel_qrk,
+	},
+
+	{
+		.vendor		= PCI_VENDOR_ID_INTEL,
 		.device		= PCI_DEVICE_ID_INTEL_MRST_SD0,
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
@@ -1130,18 +1143,13 @@
 			goto err_pci_suspend;
 	}
 
-	pci_save_state(pdev);
 	if (pm_flags & MMC_PM_KEEP_POWER) {
-		if (pm_flags & MMC_PM_WAKE_SDIO_IRQ) {
-			pci_pme_active(pdev, true);
-			pci_enable_wake(pdev, PCI_D3hot, 1);
-		}
-		pci_set_power_state(pdev, PCI_D3hot);
-	} else {
-		pci_enable_wake(pdev, PCI_D3hot, 0);
-		pci_disable_device(pdev);
-		pci_set_power_state(pdev, PCI_D3hot);
-	}
+		if (pm_flags & MMC_PM_WAKE_SDIO_IRQ)
+			device_init_wakeup(dev, true);
+		else
+			device_init_wakeup(dev, false);
+	} else
+		device_init_wakeup(dev, false);
 
 	return 0;
 
@@ -1162,12 +1170,6 @@
 	if (!chip)
 		return 0;
 
-	pci_set_power_state(pdev, PCI_D0);
-	pci_restore_state(pdev);
-	ret = pci_enable_device(pdev);
-	if (ret)
-		return ret;
-
 	if (chip->fixes && chip->fixes->resume) {
 		ret = chip->fixes->resume(chip);
 		if (ret)
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 6d71871..c101477 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -17,6 +17,7 @@
 #define PCI_DEVICE_ID_INTEL_CLV_SDIO2	0x08fb
 #define PCI_DEVICE_ID_INTEL_CLV_EMMC0	0x08e5
 #define PCI_DEVICE_ID_INTEL_CLV_EMMC1	0x08e6
+#define PCI_DEVICE_ID_INTEL_QRK_SD	0x08A7
 
 /*
  * PCI registers
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index f4f1289..6f842fb 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -288,15 +288,13 @@
 	int ret;
 	struct clk *clk;
 
-	pxa = kzalloc(sizeof(struct sdhci_pxa), GFP_KERNEL);
+	pxa = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_pxa), GFP_KERNEL);
 	if (!pxa)
 		return -ENOMEM;
 
 	host = sdhci_pltfm_init(pdev, &sdhci_pxav3_pdata, 0);
-	if (IS_ERR(host)) {
-		kfree(pxa);
+	if (IS_ERR(host))
 		return PTR_ERR(host);
-	}
 
 	if (of_device_is_compatible(np, "marvell,armada-380-sdhci")) {
 		ret = mv_conf_mbus_windows(pdev, mv_mbus_dram_info());
@@ -308,7 +306,7 @@
 	pltfm_host = sdhci_priv(host);
 	pltfm_host->priv = pxa;
 
-	clk = clk_get(dev, NULL);
+	clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(dev, "failed to get io clock\n");
 		ret = PTR_ERR(clk);
@@ -389,11 +387,9 @@
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	clk_disable_unprepare(clk);
-	clk_put(clk);
 err_clk_get:
 err_mbus_win:
 	sdhci_pltfm_free(pdev);
-	kfree(pxa);
 	return ret;
 }
 
@@ -401,17 +397,14 @@
 {
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct sdhci_pxa *pxa = pltfm_host->priv;
 
 	pm_runtime_get_sync(&pdev->dev);
 	sdhci_remove_host(host, 1);
 	pm_runtime_disable(&pdev->dev);
 
 	clk_disable_unprepare(pltfm_host->clk);
-	clk_put(pltfm_host->clk);
 
 	sdhci_pltfm_free(pdev);
-	kfree(pxa);
 
 	return 0;
 }
diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c
new file mode 100644
index 0000000..328f348
--- /dev/null
+++ b/drivers/mmc/host/sdhci-st.c
@@ -0,0 +1,176 @@
+/*
+ * Support for SDHCI on STMicroelectronics SoCs
+ *
+ * Copyright (C) 2014 STMicroelectronics Ltd
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+ * Contributors: Peter Griffin <peter.griffin@linaro.org>
+ *
+ * Based on sdhci-cns3xxx.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/mmc/host.h>
+
+#include "sdhci-pltfm.h"
+
+static u32 sdhci_st_readl(struct sdhci_host *host, int reg)
+{
+	u32 ret;
+
+	switch (reg) {
+	case SDHCI_CAPABILITIES:
+		ret = readl_relaxed(host->ioaddr + reg);
+		/* Support 3.3V and 1.8V */
+		ret &= ~SDHCI_CAN_VDD_300;
+		break;
+	default:
+		ret = readl_relaxed(host->ioaddr + reg);
+	}
+	return ret;
+}
+
+static const struct sdhci_ops sdhci_st_ops = {
+	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+	.set_clock = sdhci_set_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.read_l = sdhci_st_readl,
+	.reset = sdhci_reset,
+};
+
+static const struct sdhci_pltfm_data sdhci_st_pdata = {
+	.ops = &sdhci_st_ops,
+	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+	    SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+};
+
+
+static int sdhci_st_probe(struct platform_device *pdev)
+{
+	struct sdhci_host *host;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct clk *clk;
+	int ret = 0;
+	u16 host_version;
+
+	clk =  devm_clk_get(&pdev->dev, "mmc");
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "Peripheral clk not found\n");
+		return PTR_ERR(clk);
+	}
+
+	host = sdhci_pltfm_init(pdev, &sdhci_st_pdata, 0);
+	if (IS_ERR(host)) {
+		dev_err(&pdev->dev, "Failed sdhci_pltfm_init\n");
+		return PTR_ERR(host);
+	}
+
+	ret = mmc_of_parse(host->mmc);
+
+	if (ret) {
+		dev_err(&pdev->dev, "Failed mmc_of_parse\n");
+		return ret;
+	}
+
+	clk_prepare_enable(clk);
+
+	pltfm_host = sdhci_priv(host);
+	pltfm_host->clk = clk;
+
+	ret = sdhci_add_host(host);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed sdhci_add_host\n");
+		goto err_out;
+	}
+
+	platform_set_drvdata(pdev, host);
+
+	host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION));
+
+	dev_info(&pdev->dev, "SDHCI ST Initialised: Host Version: 0x%x Vendor Version 0x%x\n",
+		((host_version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT),
+		((host_version & SDHCI_VENDOR_VER_MASK) >>
+		SDHCI_VENDOR_VER_SHIFT));
+
+	return 0;
+
+err_out:
+	clk_disable_unprepare(clk);
+	sdhci_pltfm_free(pdev);
+
+	return ret;
+}
+
+static int sdhci_st_remove(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+	clk_disable_unprepare(pltfm_host->clk);
+
+	return sdhci_pltfm_unregister(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sdhci_st_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	int ret = sdhci_suspend_host(host);
+
+	if (ret)
+		goto out;
+
+	clk_disable_unprepare(pltfm_host->clk);
+out:
+	return ret;
+}
+
+static int sdhci_st_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+	clk_prepare_enable(pltfm_host->clk);
+
+	return sdhci_resume_host(host);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sdhci_st_pmops, sdhci_st_suspend, sdhci_st_resume);
+
+static const struct of_device_id st_sdhci_match[] = {
+	{ .compatible = "st,sdhci" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, st_sdhci_match);
+
+static struct platform_driver sdhci_st_driver = {
+	.probe = sdhci_st_probe,
+	.remove = sdhci_st_remove,
+	.driver = {
+		   .name = "sdhci-st",
+		   .pm = &sdhci_st_pmops,
+		   .of_match_table = of_match_ptr(st_sdhci_match),
+		  },
+};
+
+module_platform_driver(sdhci_st_driver);
+
+MODULE_DESCRIPTION("SDHCI driver for STMicroelectronics SoCs");
+MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:st-sdhci");
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index d93a063..33100d1 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -26,8 +26,6 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/slot-gpio.h>
 
-#include <asm/gpio.h>
-
 #include "sdhci-pltfm.h"
 
 /* Tegra SDHOST controller vendor register definitions */
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 47055f3..37b2a9a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1223,8 +1223,16 @@
 static void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
 			    unsigned short vdd)
 {
+	struct mmc_host *mmc = host->mmc;
 	u8 pwr = 0;
 
+	if (!IS_ERR(mmc->supply.vmmc)) {
+		spin_unlock_irq(&host->lock);
+		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
+		spin_lock_irq(&host->lock);
+		return;
+	}
+
 	if (mode != MMC_POWER_OFF) {
 		switch (1 << vdd) {
 		case MMC_VDD_165_195:
@@ -1283,12 +1291,6 @@
 		if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
 			mdelay(10);
 	}
-
-	if (host->vmmc) {
-		spin_unlock_irq(&host->lock);
-		mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd);
-		spin_lock_irq(&host->lock);
-	}
 }
 
 /*****************************************************************************\
@@ -1440,13 +1442,15 @@
 {
 	unsigned long flags;
 	u8 ctrl;
+	struct mmc_host *mmc = host->mmc;
 
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (host->flags & SDHCI_DEVICE_DEAD) {
 		spin_unlock_irqrestore(&host->lock, flags);
-		if (host->vmmc && ios->power_mode == MMC_POWER_OFF)
-			mmc_regulator_set_ocr(host->mmc, host->vmmc, 0);
+		if (!IS_ERR(mmc->supply.vmmc) &&
+		    ios->power_mode == MMC_POWER_OFF)
+			mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
 		return;
 	}
 
@@ -1530,7 +1534,6 @@
 			host->ops->set_clock(host, host->clock);
 		}
 
-
 		/* Reset SD Clock Enable */
 		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
 		clk &= ~SDHCI_CLOCK_CARD_EN;
@@ -1707,6 +1710,7 @@
 static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
 						struct mmc_ios *ios)
 {
+	struct mmc_host *mmc = host->mmc;
 	u16 ctrl;
 	int ret;
 
@@ -1725,11 +1729,12 @@
 		ctrl &= ~SDHCI_CTRL_VDD_180;
 		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
-		if (host->vqmmc) {
-			ret = regulator_set_voltage(host->vqmmc, 2700000, 3600000);
+		if (!IS_ERR(mmc->supply.vqmmc)) {
+			ret = regulator_set_voltage(mmc->supply.vqmmc, 2700000,
+						    3600000);
 			if (ret) {
 				pr_warning("%s: Switching to 3.3V signalling voltage "
-						" failed\n", mmc_hostname(host->mmc));
+						" failed\n", mmc_hostname(mmc));
 				return -EIO;
 			}
 		}
@@ -1742,16 +1747,16 @@
 			return 0;
 
 		pr_warning("%s: 3.3V regulator output did not became stable\n",
-				mmc_hostname(host->mmc));
+				mmc_hostname(mmc));
 
 		return -EAGAIN;
 	case MMC_SIGNAL_VOLTAGE_180:
-		if (host->vqmmc) {
-			ret = regulator_set_voltage(host->vqmmc,
+		if (!IS_ERR(mmc->supply.vqmmc)) {
+			ret = regulator_set_voltage(mmc->supply.vqmmc,
 					1700000, 1950000);
 			if (ret) {
 				pr_warning("%s: Switching to 1.8V signalling voltage "
-						" failed\n", mmc_hostname(host->mmc));
+						" failed\n", mmc_hostname(mmc));
 				return -EIO;
 			}
 		}
@@ -1763,24 +1768,22 @@
 		ctrl |= SDHCI_CTRL_VDD_180;
 		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
-		/* Wait for 5ms */
-		usleep_range(5000, 5500);
-
 		/* 1.8V regulator output should be stable within 5 ms */
 		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 		if (ctrl & SDHCI_CTRL_VDD_180)
 			return 0;
 
 		pr_warning("%s: 1.8V regulator output did not became stable\n",
-				mmc_hostname(host->mmc));
+				mmc_hostname(mmc));
 
 		return -EAGAIN;
 	case MMC_SIGNAL_VOLTAGE_120:
-		if (host->vqmmc) {
-			ret = regulator_set_voltage(host->vqmmc, 1100000, 1300000);
+		if (!IS_ERR(mmc->supply.vqmmc)) {
+			ret = regulator_set_voltage(mmc->supply.vqmmc, 1100000,
+						    1300000);
 			if (ret) {
 				pr_warning("%s: Switching to 1.2V signalling voltage "
-						" failed\n", mmc_hostname(host->mmc));
+						" failed\n", mmc_hostname(mmc));
 				return -EIO;
 			}
 		}
@@ -2643,7 +2646,6 @@
 int sdhci_runtime_suspend_host(struct sdhci_host *host)
 {
 	unsigned long flags;
-	int ret = 0;
 
 	/* Disable tuning since we are suspending */
 	if (host->flags & SDHCI_USING_RETUNING_TIMER) {
@@ -2663,14 +2665,14 @@
 	host->runtime_suspended = true;
 	spin_unlock_irqrestore(&host->lock, flags);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
 
 int sdhci_runtime_resume_host(struct sdhci_host *host)
 {
 	unsigned long flags;
-	int ret = 0, host_flags = host->flags;
+	int host_flags = host->flags;
 
 	if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
 		if (host->ops->enable_dma)
@@ -2709,7 +2711,7 @@
 
 	spin_unlock_irqrestore(&host->lock, flags);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
 
@@ -2820,12 +2822,12 @@
 		 * (128) and potentially one alignment transfer for
 		 * each of those entries.
 		 */
-		host->adma_desc = dma_alloc_coherent(mmc_dev(host->mmc),
+		host->adma_desc = dma_alloc_coherent(mmc_dev(mmc),
 						     ADMA_SIZE, &host->adma_addr,
 						     GFP_KERNEL);
 		host->align_buffer = kmalloc(128 * 4, GFP_KERNEL);
 		if (!host->adma_desc || !host->align_buffer) {
-			dma_free_coherent(mmc_dev(host->mmc), ADMA_SIZE,
+			dma_free_coherent(mmc_dev(mmc), ADMA_SIZE,
 					  host->adma_desc, host->adma_addr);
 			kfree(host->align_buffer);
 			pr_warning("%s: Unable to allocate ADMA "
@@ -2838,7 +2840,7 @@
 			pr_warning("%s: unable to allocate aligned ADMA descriptor\n",
 				   mmc_hostname(mmc));
 			host->flags &= ~SDHCI_USE_ADMA;
-			dma_free_coherent(mmc_dev(host->mmc), ADMA_SIZE,
+			dma_free_coherent(mmc_dev(mmc), ADMA_SIZE,
 					  host->adma_desc, host->adma_addr);
 			kfree(host->align_buffer);
 			host->adma_desc = NULL;
@@ -2853,7 +2855,7 @@
 	 */
 	if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
 		host->dma_mask = DMA_BIT_MASK(64);
-		mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
+		mmc_dev(mmc)->dma_mask = &host->dma_mask;
 	}
 
 	if (host->version >= SDHCI_SPEC_300)
@@ -2959,28 +2961,25 @@
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
 
 	if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
-	    !(host->mmc->caps & MMC_CAP_NONREMOVABLE))
+	    !(mmc->caps & MMC_CAP_NONREMOVABLE))
 		mmc->caps |= MMC_CAP_NEEDS_POLL;
 
+	/* If there are external regulators, get them */
+	if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
 	/* If vqmmc regulator and no 1.8V signalling, then there's no UHS */
-	host->vqmmc = regulator_get_optional(mmc_dev(mmc), "vqmmc");
-	if (IS_ERR_OR_NULL(host->vqmmc)) {
-		if (PTR_ERR(host->vqmmc) < 0) {
-			pr_info("%s: no vqmmc regulator found\n",
-				mmc_hostname(mmc));
-			host->vqmmc = NULL;
-		}
-	} else {
-		ret = regulator_enable(host->vqmmc);
-		if (!regulator_is_supported_voltage(host->vqmmc, 1700000,
-			1950000))
+	if (!IS_ERR(mmc->supply.vqmmc)) {
+		ret = regulator_enable(mmc->supply.vqmmc);
+		if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
+						    1950000))
 			caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
 					SDHCI_SUPPORT_SDR50 |
 					SDHCI_SUPPORT_DDR50);
 		if (ret) {
 			pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
 				mmc_hostname(mmc), ret);
-			host->vqmmc = NULL;
+			mmc->supply.vqmmc = NULL;
 		}
 	}
 
@@ -3041,34 +3040,6 @@
 
 	ocr_avail = 0;
 
-	host->vmmc = regulator_get_optional(mmc_dev(mmc), "vmmc");
-	if (IS_ERR_OR_NULL(host->vmmc)) {
-		if (PTR_ERR(host->vmmc) < 0) {
-			pr_info("%s: no vmmc regulator found\n",
-				mmc_hostname(mmc));
-			host->vmmc = NULL;
-		}
-	}
-
-#ifdef CONFIG_REGULATOR
-	/*
-	 * Voltage range check makes sense only if regulator reports
-	 * any voltage value.
-	 */
-	if (host->vmmc && regulator_get_voltage(host->vmmc) > 0) {
-		ret = regulator_is_supported_voltage(host->vmmc, 2700000,
-			3600000);
-		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330)))
-			caps[0] &= ~SDHCI_CAN_VDD_330;
-		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300)))
-			caps[0] &= ~SDHCI_CAN_VDD_300;
-		ret = regulator_is_supported_voltage(host->vmmc, 1700000,
-			1950000);
-		if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180)))
-			caps[0] &= ~SDHCI_CAN_VDD_180;
-	}
-#endif /* CONFIG_REGULATOR */
-
 	/*
 	 * According to SD Host Controller spec v3.00, if the Host System
 	 * can afford more than 150mA, Host Driver should set XPC to 1. Also
@@ -3077,8 +3048,8 @@
 	 * value.
 	 */
 	max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
-	if (!max_current_caps && host->vmmc) {
-		u32 curr = regulator_get_current_limit(host->vmmc);
+	if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) {
+		u32 curr = regulator_get_current_limit(mmc->supply.vmmc);
 		if (curr > 0) {
 
 			/* convert to SDHCI_MAX_CURRENT format */
@@ -3118,8 +3089,12 @@
 				   SDHCI_MAX_CURRENT_MULTIPLIER;
 	}
 
+	/* If OCR set by external regulators, use it instead */
+	if (mmc->ocr_avail)
+		ocr_avail = mmc->ocr_avail;
+
 	if (host->ocr_mask)
-		ocr_avail = host->ocr_mask;
+		ocr_avail &= host->ocr_mask;
 
 	mmc->ocr_avail = ocr_avail;
 	mmc->ocr_avail_sdio = ocr_avail;
@@ -3273,6 +3248,7 @@
 
 void sdhci_remove_host(struct sdhci_host *host, int dead)
 {
+	struct mmc_host *mmc = host->mmc;
 	unsigned long flags;
 
 	if (dead) {
@@ -3282,7 +3258,7 @@
 
 		if (host->mrq) {
 			pr_err("%s: Controller removed during "
-				" transfer!\n", mmc_hostname(host->mmc));
+				" transfer!\n", mmc_hostname(mmc));
 
 			host->mrq->cmd->error = -ENOMEDIUM;
 			tasklet_schedule(&host->finish_tasklet);
@@ -3293,7 +3269,7 @@
 
 	sdhci_disable_card_detection(host);
 
-	mmc_remove_host(host->mmc);
+	mmc_remove_host(mmc);
 
 #ifdef SDHCI_USE_LEDS_CLASS
 	led_classdev_unregister(&host->led);
@@ -3310,18 +3286,14 @@
 
 	tasklet_kill(&host->finish_tasklet);
 
-	if (host->vmmc) {
-		regulator_disable(host->vmmc);
-		regulator_put(host->vmmc);
-	}
+	if (!IS_ERR(mmc->supply.vmmc))
+		regulator_disable(mmc->supply.vmmc);
 
-	if (host->vqmmc) {
-		regulator_disable(host->vqmmc);
-		regulator_put(host->vqmmc);
-	}
+	if (!IS_ERR(mmc->supply.vqmmc))
+		regulator_disable(mmc->supply.vqmmc);
 
 	if (host->adma_desc)
-		dma_free_coherent(mmc_dev(host->mmc), ADMA_SIZE,
+		dma_free_coherent(mmc_dev(mmc), ADMA_SIZE,
 				  host->adma_desc, host->adma_addr);
 	kfree(host->align_buffer);
 
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 656fbba..d11708c 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -386,7 +386,7 @@
 			 struct sh_mmcif_plat_data *pdata,
 			 enum dma_transfer_direction direction)
 {
-	struct dma_slave_config cfg;
+	struct dma_slave_config cfg = { 0, };
 	struct dma_chan *chan;
 	unsigned int slave_id;
 	struct resource *res;
@@ -417,8 +417,15 @@
 	/* In the OF case the driver will get the slave ID from the DT */
 	cfg.slave_id = slave_id;
 	cfg.direction = direction;
-	cfg.dst_addr = res->start + MMCIF_CE_DATA;
-	cfg.src_addr = 0;
+
+	if (direction == DMA_DEV_TO_MEM) {
+		cfg.src_addr = res->start + MMCIF_CE_DATA;
+		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	} else {
+		cfg.dst_addr = res->start + MMCIF_CE_DATA;
+		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	}
+
 	ret = dmaengine_slave_config(chan, &cfg);
 	if (ret < 0) {
 		dma_release_channel(chan);
@@ -1378,26 +1385,19 @@
 		dev_err(&pdev->dev, "Get irq error\n");
 		return -ENXIO;
 	}
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "platform_get_resource error.\n");
-		return -ENXIO;
-	}
-	reg = ioremap(res->start, resource_size(res));
-	if (!reg) {
-		dev_err(&pdev->dev, "ioremap error.\n");
-		return -ENOMEM;
-	}
+	reg = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
 	mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
-	if (!mmc) {
-		ret = -ENOMEM;
-		goto ealloch;
-	}
+	if (!mmc)
+		return -ENOMEM;
 
 	ret = mmc_of_parse(mmc);
 	if (ret < 0)
-		goto eofparse;
+		goto err_host;
 
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
@@ -1427,19 +1427,19 @@
 	pm_runtime_enable(&pdev->dev);
 	host->power = false;
 
-	host->hclk = clk_get(&pdev->dev, NULL);
+	host->hclk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(host->hclk)) {
 		ret = PTR_ERR(host->hclk);
 		dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
-		goto eclkget;
+		goto err_pm;
 	}
 	ret = sh_mmcif_clk_update(host);
 	if (ret < 0)
-		goto eclkupdate;
+		goto err_pm;
 
 	ret = pm_runtime_resume(&pdev->dev);
 	if (ret < 0)
-		goto eresume;
+		goto err_clk;
 
 	INIT_DELAYED_WORK(&host->timeout_work, mmcif_timeout_work);
 
@@ -1447,65 +1447,55 @@
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 
 	name = irq[1] < 0 ? dev_name(&pdev->dev) : "sh_mmc:error";
-	ret = request_threaded_irq(irq[0], sh_mmcif_intr, sh_mmcif_irqt, 0, name, host);
+	ret = devm_request_threaded_irq(&pdev->dev, irq[0], sh_mmcif_intr,
+					sh_mmcif_irqt, 0, name, host);
 	if (ret) {
 		dev_err(&pdev->dev, "request_irq error (%s)\n", name);
-		goto ereqirq0;
+		goto err_clk;
 	}
 	if (irq[1] >= 0) {
-		ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt,
-					   0, "sh_mmc:int", host);
+		ret = devm_request_threaded_irq(&pdev->dev, irq[1],
+						sh_mmcif_intr, sh_mmcif_irqt,
+						0, "sh_mmc:int", host);
 		if (ret) {
 			dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
-			goto ereqirq1;
+			goto err_clk;
 		}
 	}
 
 	if (pd && pd->use_cd_gpio) {
 		ret = mmc_gpio_request_cd(mmc, pd->cd_gpio, 0);
 		if (ret < 0)
-			goto erqcd;
+			goto err_clk;
 	}
 
 	mutex_init(&host->thread_lock);
 
-	clk_disable_unprepare(host->hclk);
 	ret = mmc_add_host(mmc);
 	if (ret < 0)
-		goto emmcaddh;
+		goto err_clk;
 
 	dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
 
-	dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
-	dev_dbg(&pdev->dev, "chip ver H'%04x\n",
-		sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
+	dev_info(&pdev->dev, "Chip version 0x%04x, clock rate %luMHz\n",
+		 sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0xffff,
+		 clk_get_rate(host->hclk) / 1000000UL);
+
+	clk_disable_unprepare(host->hclk);
 	return ret;
 
-emmcaddh:
-erqcd:
-	if (irq[1] >= 0)
-		free_irq(irq[1], host);
-ereqirq1:
-	free_irq(irq[0], host);
-ereqirq0:
-	pm_runtime_suspend(&pdev->dev);
-eresume:
+err_clk:
 	clk_disable_unprepare(host->hclk);
-eclkupdate:
-	clk_put(host->hclk);
-eclkget:
+err_pm:
 	pm_runtime_disable(&pdev->dev);
-eofparse:
+err_host:
 	mmc_free_host(mmc);
-ealloch:
-	iounmap(reg);
 	return ret;
 }
 
 static int sh_mmcif_remove(struct platform_device *pdev)
 {
 	struct sh_mmcif_host *host = platform_get_drvdata(pdev);
-	int irq[2];
 
 	host->dying = true;
 	clk_prepare_enable(host->hclk);
@@ -1523,16 +1513,6 @@
 	 */
 	cancel_delayed_work_sync(&host->timeout_work);
 
-	if (host->addr)
-		iounmap(host->addr);
-
-	irq[0] = platform_get_irq(pdev, 0);
-	irq[1] = platform_get_irq(pdev, 1);
-
-	free_irq(irq[0], host);
-	if (irq[1] >= 0)
-		free_irq(irq[1], host);
-
 	clk_disable_unprepare(host->hclk);
 	mmc_free_host(host->mmc);
 	pm_runtime_put_sync(&pdev->dev);
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index 03e7b28..eb8f1d5 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -294,6 +294,7 @@
 			cfg.slave_id = pdata->dma->slave_id_tx;
 		cfg.direction = DMA_MEM_TO_DEV;
 		cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->pdata->bus_shift);
+		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 		cfg.src_addr = 0;
 		ret = dmaengine_slave_config(host->chan_tx, &cfg);
 		if (ret < 0)
@@ -312,6 +313,7 @@
 			cfg.slave_id = pdata->dma->slave_id_rx;
 		cfg.direction = DMA_DEV_TO_MEM;
 		cfg.src_addr = cfg.dst_addr;
+		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 		cfg.dst_addr = 0;
 		ret = dmaengine_slave_config(host->chan_rx, &cfg);
 		if (ret < 0)
diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index 282891a..54181b4 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -72,7 +72,6 @@
 #define BM_SPI_CS			0x20
 #define BM_SD_POWER			0x40
 #define BM_SOFT_RESET			0x80
-#define BM_ONEBIT_MASK			0xFD
 
 /* SDMMC_BLKLEN bit fields */
 #define BLKL_CRCERR_ABORT		0x0800
@@ -120,6 +119,8 @@
 #define STS2_DATARSP_BUSY		0x20
 #define STS2_DIS_FORCECLK		0x80
 
+/* SDMMC_EXTCTRL bit fields */
+#define EXT_EIGHTBIT			0x04
 
 /* MMC/SD DMA Controller Registers */
 #define SDDMA_GCR			0x100
@@ -672,7 +673,7 @@
 static void wmt_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct wmt_mci_priv *priv;
-	u32 reg_tmp;
+	u32 busmode, extctrl;
 
 	priv = mmc_priv(mmc);
 
@@ -687,28 +688,26 @@
 	if (ios->clock != 0)
 		clk_set_rate(priv->clk_sdmmc, ios->clock);
 
+	busmode = readb(priv->sdmmc_base + SDMMC_BUSMODE);
+	extctrl = readb(priv->sdmmc_base + SDMMC_EXTCTRL);
+
+	busmode &= ~(BM_EIGHTBIT_MODE | BM_FOURBIT_MODE);
+	extctrl &= ~EXT_EIGHTBIT;
+
 	switch (ios->bus_width) {
 	case MMC_BUS_WIDTH_8:
-		reg_tmp = readb(priv->sdmmc_base + SDMMC_EXTCTRL);
-		writeb(reg_tmp | 0x04, priv->sdmmc_base + SDMMC_EXTCTRL);
+		busmode |= BM_EIGHTBIT_MODE;
+		extctrl |= EXT_EIGHTBIT;
 		break;
 	case MMC_BUS_WIDTH_4:
-		reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE);
-		writeb(reg_tmp | BM_FOURBIT_MODE, priv->sdmmc_base +
-		       SDMMC_BUSMODE);
-
-		reg_tmp = readb(priv->sdmmc_base + SDMMC_EXTCTRL);
-		writeb(reg_tmp & 0xFB, priv->sdmmc_base + SDMMC_EXTCTRL);
+		busmode |= BM_FOURBIT_MODE;
 		break;
 	case MMC_BUS_WIDTH_1:
-		reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE);
-		writeb(reg_tmp & BM_ONEBIT_MASK, priv->sdmmc_base +
-		       SDMMC_BUSMODE);
-
-		reg_tmp = readb(priv->sdmmc_base + SDMMC_EXTCTRL);
-		writeb(reg_tmp & 0xFB, priv->sdmmc_base + SDMMC_EXTCTRL);
 		break;
 	}
+
+	writeb(busmode, priv->sdmmc_base + SDMMC_BUSMODE);
+	writeb(extctrl, priv->sdmmc_base + SDMMC_EXTCTRL);
 }
 
 static int wmt_mci_get_ro(struct mmc_host *mmc)
@@ -830,7 +829,7 @@
 		goto fail3;
 	}
 
-	ret = request_irq(dma_irq, wmt_mci_dma_isr, 32, "sdmmc", priv);
+	ret = request_irq(dma_irq, wmt_mci_dma_isr, 0, "sdmmc", priv);
 	if (ret) {
 		dev_err(&pdev->dev, "Register DMA IRQ fail\n");
 		goto fail4;
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 8457df7..33c6495 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -378,9 +378,11 @@
 {
 	struct ubiblock *dev;
 	struct gendisk *gd;
-	int disk_capacity;
+	u64 disk_capacity = ((u64)vi->size * vi->usable_leb_size) >> 9;
 	int ret;
 
+	if ((sector_t)disk_capacity != disk_capacity)
+		return -EFBIG;
 	/* Check that the volume isn't already handled */
 	mutex_lock(&devices_mutex);
 	if (find_dev_nolock(vi->ubi_num, vi->vol_id)) {
@@ -412,7 +414,6 @@
 	gd->first_minor = dev->ubi_num * UBI_MAX_VOLUMES + dev->vol_id;
 	gd->private_data = dev;
 	sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
-	disk_capacity = (vi->size * vi->usable_leb_size) >> 9;
 	set_capacity(gd, disk_capacity);
 	dev->gd = gd;
 
@@ -498,11 +499,16 @@
 	return 0;
 }
 
-static void ubiblock_resize(struct ubi_volume_info *vi)
+static int ubiblock_resize(struct ubi_volume_info *vi)
 {
 	struct ubiblock *dev;
-	int disk_capacity;
+	u64 disk_capacity = ((u64)vi->size * vi->usable_leb_size) >> 9;
 
+	if ((sector_t)disk_capacity != disk_capacity) {
+		ubi_warn("%s: the volume is too big, cannot resize (%d LEBs)",
+			 dev->gd->disk_name, vi->size);
+		return -EFBIG;
+	}
 	/*
 	 * Need to lock the device list until we stop using the device,
 	 * otherwise the device struct might get released in
@@ -512,15 +518,15 @@
 	dev = find_dev_nolock(vi->ubi_num, vi->vol_id);
 	if (!dev) {
 		mutex_unlock(&devices_mutex);
-		return;
+		return -ENODEV;
 	}
 
 	mutex_lock(&dev->dev_mutex);
-	disk_capacity = (vi->size * vi->usable_leb_size) >> 9;
 	set_capacity(dev->gd, disk_capacity);
 	ubi_msg("%s resized to %d LEBs", dev->gd->disk_name, vi->size);
 	mutex_unlock(&dev->dev_mutex);
 	mutex_unlock(&devices_mutex);
+	return 0;
 }
 
 static int ubiblock_notify(struct notifier_block *nb,
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index d77b1c1..07cac5f 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -591,7 +591,7 @@
 
 		/* Static volumes only */
 		av = ubi_find_av(ai, i);
-		if (!av) {
+		if (!av || !av->leb_count) {
 			/*
 			 * No eraseblocks belonging to this volume found. We
 			 * don't actually know whether this static volume is
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 0f3425d..20f4917 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1718,12 +1718,12 @@
 	       vol_id, lnum, ubi->works_count);
 
 	while (found) {
-		struct ubi_work *wrk;
+		struct ubi_work *wrk, *tmp;
 		found = 0;
 
 		down_read(&ubi->work_sem);
 		spin_lock(&ubi->wl_lock);
-		list_for_each_entry(wrk, &ubi->works, list) {
+		list_for_each_entry_safe(wrk, tmp, &ubi->works, list) {
 			if ((vol_id == UBI_ALL || wrk->vol_id == vol_id) &&
 			    (lnum == UBI_ALL || wrk->lnum == lnum)) {
 				list_del(&wrk->list);
diff --git a/drivers/net/arcnet/com20020_cs.c b/drivers/net/arcnet/com20020_cs.c
index 326a612..1a790a2 100644
--- a/drivers/net/arcnet/com20020_cs.c
+++ b/drivers/net/arcnet/com20020_cs.c
@@ -112,20 +112,20 @@
 
 /*====================================================================*/
 
-typedef struct com20020_dev_t {
+struct com20020_dev {
     struct net_device       *dev;
-} com20020_dev_t;
+};
 
 static int com20020_probe(struct pcmcia_device *p_dev)
 {
-    com20020_dev_t *info;
+    struct com20020_dev *info;
     struct net_device *dev;
     struct arcnet_local *lp;
 
     dev_dbg(&p_dev->dev, "com20020_attach()\n");
 
     /* Create new network device */
-    info = kzalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
+    info = kzalloc(sizeof(*info), GFP_KERNEL);
     if (!info)
 	goto fail_alloc_info;
 
@@ -160,7 +160,7 @@
 
 static void com20020_detach(struct pcmcia_device *link)
 {
-    struct com20020_dev_t *info = link->priv;
+    struct com20020_dev *info = link->priv;
     struct net_device *dev = info->dev;
 
     dev_dbg(&link->dev, "detach...\n");
@@ -199,7 +199,7 @@
 static int com20020_config(struct pcmcia_device *link)
 {
     struct arcnet_local *lp;
-    com20020_dev_t *info;
+    struct com20020_dev *info;
     struct net_device *dev;
     int i, ret;
     int ioaddr;
@@ -291,7 +291,7 @@
 
 static int com20020_suspend(struct pcmcia_device *link)
 {
-	com20020_dev_t *info = link->priv;
+	struct com20020_dev *info = link->priv;
 	struct net_device *dev = info->dev;
 
 	if (link->open)
@@ -302,7 +302,7 @@
 
 static int com20020_resume(struct pcmcia_device *link)
 {
-	com20020_dev_t *info = link->priv;
+	struct com20020_dev *info = link->priv;
 	struct net_device *dev = info->dev;
 
 	if (link->open) {
diff --git a/drivers/net/ethernet/8390/Kconfig b/drivers/net/ethernet/8390/Kconfig
index 0988811..2d89bd0 100644
--- a/drivers/net/ethernet/8390/Kconfig
+++ b/drivers/net/ethernet/8390/Kconfig
@@ -91,7 +91,8 @@
 
 config NE2000
 	tristate "NE2000/NE1000 support"
-	depends on (ISA || (Q40 && m) || M32R || MACH_TX49XX)
+	depends on (ISA || (Q40 && m) || M32R || MACH_TX49XX || \
+		    ATARI_ETHERNEC)
 	select CRC32
 	---help---
 	  If you have a network (Ethernet) card of this type, say Y and read
diff --git a/drivers/net/ethernet/8390/axnet_cs.c b/drivers/net/ethernet/8390/axnet_cs.c
index 73c57a4..7769c05 100644
--- a/drivers/net/ethernet/8390/axnet_cs.c
+++ b/drivers/net/ethernet/8390/axnet_cs.c
@@ -108,7 +108,7 @@
 
 /*====================================================================*/
 
-typedef struct axnet_dev_t {
+struct axnet_dev {
 	struct pcmcia_device	*p_dev;
 	caddr_t	base;
 	struct timer_list	watchdog;
@@ -118,9 +118,9 @@
 	int	phy_id;
 	int	flags;
 	int	active_low;
-} axnet_dev_t;
+};
 
-static inline axnet_dev_t *PRIV(struct net_device *dev)
+static inline struct axnet_dev *PRIV(struct net_device *dev)
 {
 	void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
 	return p;
@@ -141,13 +141,13 @@
 
 static int axnet_probe(struct pcmcia_device *link)
 {
-    axnet_dev_t *info;
+    struct axnet_dev *info;
     struct net_device *dev;
     struct ei_device *ei_local;
 
     dev_dbg(&link->dev, "axnet_attach()\n");
 
-    dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
+    dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev));
     if (!dev)
 	return -ENOMEM;
 
@@ -274,7 +274,7 @@
 static int axnet_config(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
-    axnet_dev_t *info = PRIV(dev);
+    struct axnet_dev *info = PRIV(dev);
     int i, j, j2, ret;
 
     dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
@@ -389,7 +389,7 @@
 static int axnet_resume(struct pcmcia_device *link)
 {
 	struct net_device *dev = link->priv;
-	axnet_dev_t *info = PRIV(dev);
+	struct axnet_dev *info = PRIV(dev);
 
 	if (link->open) {
 		if (info->active_low == 1)
@@ -467,7 +467,7 @@
 static int axnet_open(struct net_device *dev)
 {
     int ret;
-    axnet_dev_t *info = PRIV(dev);
+    struct axnet_dev *info = PRIV(dev);
     struct pcmcia_device *link = info->p_dev;
     unsigned int nic_base = dev->base_addr;
     
@@ -497,7 +497,7 @@
 
 static int axnet_close(struct net_device *dev)
 {
-    axnet_dev_t *info = PRIV(dev);
+    struct axnet_dev *info = PRIV(dev);
     struct pcmcia_device *link = info->p_dev;
 
     dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
@@ -554,7 +554,7 @@
 static void ei_watchdog(u_long arg)
 {
     struct net_device *dev = (struct net_device *)(arg);
-    axnet_dev_t *info = PRIV(dev);
+    struct axnet_dev *info = PRIV(dev);
     unsigned int nic_base = dev->base_addr;
     unsigned int mii_addr = nic_base + AXNET_MII_EEP;
     u_short link;
@@ -610,7 +610,7 @@
 
 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
-    axnet_dev_t *info = PRIV(dev);
+    struct axnet_dev *info = PRIV(dev);
     struct mii_ioctl_data *data = if_mii(rq);
     unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
     switch (cmd) {
@@ -1452,7 +1452,7 @@
 
 static void ei_rx_overrun(struct net_device *dev)
 {
-	axnet_dev_t *info = PRIV(dev);
+	struct axnet_dev *info = PRIV(dev);
 	long e8390_base = dev->base_addr;
 	unsigned char was_txing, must_resend = 0;
 	struct ei_device *ei_local = netdev_priv(dev);
@@ -1624,7 +1624,7 @@
 
 static void AX88190_init(struct net_device *dev, int startp)
 {
-	axnet_dev_t *info = PRIV(dev);
+	struct axnet_dev *info = PRIV(dev);
 	long e8390_base = dev->base_addr;
 	struct ei_device *ei_local = netdev_priv(dev);
 	int i;
diff --git a/drivers/net/ethernet/8390/ne.c b/drivers/net/ethernet/8390/ne.c
index 58eaa8f..de566fb 100644
--- a/drivers/net/ethernet/8390/ne.c
+++ b/drivers/net/ethernet/8390/ne.c
@@ -169,6 +169,8 @@
 #elif defined(CONFIG_PLAT_OAKS32R)  || \
    defined(CONFIG_MACH_TX49XX)
 #  define DCR_VAL 0x48		/* 8-bit mode */
+#elif defined(CONFIG_ATARI)	/* 8-bit mode on Atari, normal on Q40 */
+#  define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
 #else
 #  define DCR_VAL 0x49
 #endif
diff --git a/drivers/net/ethernet/8390/pcnet_cs.c b/drivers/net/ethernet/8390/pcnet_cs.c
index ca3c2b9..9fb7b9d 100644
--- a/drivers/net/ethernet/8390/pcnet_cs.c
+++ b/drivers/net/ethernet/8390/pcnet_cs.c
@@ -111,11 +111,11 @@
 
 /*====================================================================*/
 
-typedef struct hw_info_t {
+struct hw_info {
     u_int	offset;
     u_char	a0, a1, a2;
     u_int	flags;
-} hw_info_t;
+};
 
 #define DELAY_OUTPUT	0x01
 #define HAS_MISC_REG	0x02
@@ -132,7 +132,7 @@
 #define MII_PHYID_REG1		0x02
 #define MII_PHYID_REG2		0x03
 
-static hw_info_t hw_info[] = {
+static struct hw_info hw_info[] = {
     { /* Accton EN2212 */ 0x0ff0, 0x00, 0x00, 0xe8, DELAY_OUTPUT },
     { /* Allied Telesis LA-PCM */ 0x0ff0, 0x00, 0x00, 0xf4, 0 },
     { /* APEX MultiCard */ 0x03f4, 0x00, 0x20, 0xe5, 0 },
@@ -196,11 +196,11 @@
 
 #define NR_INFO		ARRAY_SIZE(hw_info)
 
-static hw_info_t default_info = { 0, 0, 0, 0, 0 };
-static hw_info_t dl10019_info = { 0, 0, 0, 0, IS_DL10019|HAS_MII };
-static hw_info_t dl10022_info = { 0, 0, 0, 0, IS_DL10022|HAS_MII };
+static struct hw_info default_info = { 0, 0, 0, 0, 0 };
+static struct hw_info dl10019_info = { 0, 0, 0, 0, IS_DL10019|HAS_MII };
+static struct hw_info dl10022_info = { 0, 0, 0, 0, IS_DL10022|HAS_MII };
 
-typedef struct pcnet_dev_t {
+struct pcnet_dev {
 	struct pcmcia_device	*p_dev;
     u_int		flags;
     void		__iomem *base;
@@ -210,12 +210,12 @@
     u_char		eth_phy, pna_phy;
     u_short		link_status;
     u_long		mii_reset;
-} pcnet_dev_t;
+};
 
-static inline pcnet_dev_t *PRIV(struct net_device *dev)
+static inline struct pcnet_dev *PRIV(struct net_device *dev)
 {
 	char *p = netdev_priv(dev);
-	return (pcnet_dev_t *)(p + sizeof(struct ei_device));
+	return (struct pcnet_dev *)(p + sizeof(struct ei_device));
 }
 
 static const struct net_device_ops pcnet_netdev_ops = {
@@ -237,13 +237,13 @@
 
 static int pcnet_probe(struct pcmcia_device *link)
 {
-    pcnet_dev_t *info;
+    struct pcnet_dev *info;
     struct net_device *dev;
 
     dev_dbg(&link->dev, "pcnet_attach()\n");
 
     /* Create new ethernet device */
-    dev = __alloc_ei_netdev(sizeof(pcnet_dev_t));
+    dev = __alloc_ei_netdev(sizeof(struct pcnet_dev));
     if (!dev) return -ENOMEM;
     info = PRIV(dev);
     info->p_dev = link;
@@ -276,7 +276,7 @@
 
 ======================================================================*/
 
-static hw_info_t *get_hwinfo(struct pcmcia_device *link)
+static struct hw_info *get_hwinfo(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
     u_char __iomem *base, *virt;
@@ -317,7 +317,7 @@
 
 ======================================================================*/
 
-static hw_info_t *get_prom(struct pcmcia_device *link)
+static struct hw_info *get_prom(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
     unsigned int ioaddr = dev->base_addr;
@@ -371,7 +371,7 @@
 
 ======================================================================*/
 
-static hw_info_t *get_dl10019(struct pcmcia_device *link)
+static struct hw_info *get_dl10019(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
     int i;
@@ -393,7 +393,7 @@
 
 ======================================================================*/
 
-static hw_info_t *get_ax88190(struct pcmcia_device *link)
+static struct hw_info *get_ax88190(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
     unsigned int ioaddr = dev->base_addr;
@@ -424,7 +424,7 @@
 
 ======================================================================*/
 
-static hw_info_t *get_hwired(struct pcmcia_device *link)
+static struct hw_info *get_hwired(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
     int i;
@@ -489,12 +489,12 @@
 	return try_io_port(p_dev);
 }
 
-static hw_info_t *pcnet_try_config(struct pcmcia_device *link,
-				   int *has_shmem, int try)
+static struct hw_info *pcnet_try_config(struct pcmcia_device *link,
+					int *has_shmem, int try)
 {
 	struct net_device *dev = link->priv;
-	hw_info_t *local_hw_info;
-	pcnet_dev_t *info = PRIV(dev);
+	struct hw_info *local_hw_info;
+	struct pcnet_dev *info = PRIV(dev);
 	int priv = try;
 	int ret;
 
@@ -553,10 +553,10 @@
 static int pcnet_config(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     int start_pg, stop_pg, cm_offset;
     int has_shmem = 0;
-    hw_info_t *local_hw_info;
+    struct hw_info *local_hw_info;
     struct ei_device *ei_local;
 
     dev_dbg(&link->dev, "pcnet_config\n");
@@ -639,7 +639,7 @@
 
 static void pcnet_release(struct pcmcia_device *link)
 {
-	pcnet_dev_t *info = PRIV(link->priv);
+	struct pcnet_dev *info = PRIV(link->priv);
 
 	dev_dbg(&link->dev, "pcnet_release\n");
 
@@ -836,7 +836,7 @@
 static void set_misc_reg(struct net_device *dev)
 {
     unsigned int nic_base = dev->base_addr;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     u_char tmp;
 
     if (info->flags & HAS_MISC_REG) {
@@ -873,7 +873,7 @@
 
 static void mii_phy_probe(struct net_device *dev)
 {
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     unsigned int mii_addr = dev->base_addr + DLINK_GPIO;
     int i;
     u_int tmp, phyid;
@@ -898,7 +898,7 @@
 static int pcnet_open(struct net_device *dev)
 {
     int ret;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     struct pcmcia_device *link = info->p_dev;
     unsigned int nic_base = dev->base_addr;
 
@@ -931,7 +931,7 @@
 
 static int pcnet_close(struct net_device *dev)
 {
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     struct pcmcia_device *link = info->p_dev;
 
     dev_dbg(&link->dev, "pcnet_close('%s')\n", dev->name);
@@ -982,7 +982,7 @@
 
 static int set_config(struct net_device *dev, struct ifmap *map)
 {
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
 	if (!(info->flags & HAS_MISC_REG))
 	    return -EOPNOTSUPP;
@@ -1000,7 +1000,7 @@
 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
 {
     struct net_device *dev = dev_id;
-    pcnet_dev_t *info;
+    struct pcnet_dev *info;
     irqreturn_t ret = ei_interrupt(irq, dev_id);
 
     if (ret == IRQ_HANDLED) {
@@ -1013,7 +1013,7 @@
 static void ei_watchdog(u_long arg)
 {
     struct net_device *dev = (struct net_device *)arg;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     unsigned int nic_base = dev->base_addr;
     unsigned int mii_addr = nic_base + DLINK_GPIO;
     u_short link;
@@ -1101,7 +1101,7 @@
 
 static int ei_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     struct mii_ioctl_data *data = if_mii(rq);
     unsigned int mii_addr = dev->base_addr + DLINK_GPIO;
 
@@ -1214,7 +1214,7 @@
 			     const u_char *buf, const int start_page)
 {
     unsigned int nic_base = dev->base_addr;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
 #ifdef PCMCIA_DEBUG
     int retries = 0;
     struct ei_device *ei_local = netdev_priv(dev);
@@ -1403,7 +1403,7 @@
 			      int stop_pg, int cm_offset)
 {
     struct net_device *dev = link->priv;
-    pcnet_dev_t *info = PRIV(dev);
+    struct pcnet_dev *info = PRIV(dev);
     int i, window_size, offset, ret;
 
     window_size = (stop_pg - start_pg) << 8;
diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index edb7186..dc7406c 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -24,6 +24,7 @@
 source "drivers/net/ethernet/alteon/Kconfig"
 source "drivers/net/ethernet/altera/Kconfig"
 source "drivers/net/ethernet/amd/Kconfig"
+source "drivers/net/ethernet/apm/Kconfig"
 source "drivers/net/ethernet/apple/Kconfig"
 source "drivers/net/ethernet/arc/Kconfig"
 source "drivers/net/ethernet/atheros/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 58de333..224a018 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -10,6 +10,7 @@
 obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/
 obj-$(CONFIG_ALTERA_TSE) += altera/
 obj-$(CONFIG_NET_VENDOR_AMD) += amd/
+obj-$(CONFIG_NET_XGENE) += apm/
 obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
 obj-$(CONFIG_NET_VENDOR_ARC) += arc/
 obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 1f5487f..dc84f71 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -117,7 +117,6 @@
 #include <linux/spinlock.h>
 #include <linux/tcp.h>
 #include <linux/if_vlan.h>
-#include <linux/phy.h>
 #include <net/busy_poll.h>
 #include <linux/clk.h>
 #include <linux/if_ether.h>
diff --git a/drivers/net/ethernet/apm/Kconfig b/drivers/net/ethernet/apm/Kconfig
new file mode 100644
index 0000000..ec63d70
--- /dev/null
+++ b/drivers/net/ethernet/apm/Kconfig
@@ -0,0 +1 @@
+source "drivers/net/ethernet/apm/xgene/Kconfig"
diff --git a/drivers/net/ethernet/apm/Makefile b/drivers/net/ethernet/apm/Makefile
new file mode 100644
index 0000000..65ce32a
--- /dev/null
+++ b/drivers/net/ethernet/apm/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for APM X-GENE Ethernet driver.
+#
+
+obj-$(CONFIG_NET_XGENE) += xgene/
diff --git a/drivers/net/ethernet/apm/xgene/Kconfig b/drivers/net/ethernet/apm/xgene/Kconfig
new file mode 100644
index 0000000..616dff6
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/Kconfig
@@ -0,0 +1,9 @@
+config NET_XGENE
+	tristate "APM X-Gene SoC Ethernet Driver"
+	select PHYLIB
+	help
+	  This is the Ethernet driver for the on-chip ethernet interface on the
+	  APM X-Gene SoC.
+
+	  To compile this driver as a module, choose M here. This module will
+	  be called xgene_enet.
diff --git a/drivers/net/ethernet/apm/xgene/Makefile b/drivers/net/ethernet/apm/xgene/Makefile
new file mode 100644
index 0000000..c643e8a
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for APM X-Gene Ethernet Driver.
+#
+
+xgene-enet-objs := xgene_enet_hw.o xgene_enet_main.o xgene_enet_ethtool.o
+obj-$(CONFIG_NET_XGENE) += xgene-enet.o
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
new file mode 100644
index 0000000..63f2aa5
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
@@ -0,0 +1,125 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/ethtool.h>
+#include "xgene_enet_main.h"
+
+struct xgene_gstrings_stats {
+	char name[ETH_GSTRING_LEN];
+	int offset;
+};
+
+#define XGENE_STAT(m) { #m, offsetof(struct xgene_enet_pdata, stats.m) }
+
+static const struct xgene_gstrings_stats gstrings_stats[] = {
+	XGENE_STAT(rx_packets),
+	XGENE_STAT(tx_packets),
+	XGENE_STAT(rx_bytes),
+	XGENE_STAT(tx_bytes),
+	XGENE_STAT(rx_errors),
+	XGENE_STAT(tx_errors),
+	XGENE_STAT(rx_length_errors),
+	XGENE_STAT(rx_crc_errors),
+	XGENE_STAT(rx_frame_errors),
+	XGENE_STAT(rx_fifo_errors)
+};
+
+#define XGENE_STATS_LEN		ARRAY_SIZE(gstrings_stats)
+
+static void xgene_get_drvinfo(struct net_device *ndev,
+			      struct ethtool_drvinfo *info)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct platform_device *pdev = pdata->pdev;
+
+	strcpy(info->driver, "xgene_enet");
+	strcpy(info->version, XGENE_DRV_VERSION);
+	snprintf(info->fw_version, ETHTOOL_FWVERS_LEN, "N/A");
+	sprintf(info->bus_info, "%s", pdev->name);
+}
+
+static int xgene_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct phy_device *phydev = pdata->phy_dev;
+
+	if (phydev == NULL)
+		return -ENODEV;
+
+	return phy_ethtool_gset(phydev, cmd);
+}
+
+static int xgene_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct phy_device *phydev = pdata->phy_dev;
+
+	if (phydev == NULL)
+		return -ENODEV;
+
+	return phy_ethtool_sset(phydev, cmd);
+}
+
+static void xgene_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+	int i;
+	u8 *p = data;
+
+	if (stringset != ETH_SS_STATS)
+		return;
+
+	for (i = 0; i < XGENE_STATS_LEN; i++) {
+		memcpy(p, gstrings_stats[i].name, ETH_GSTRING_LEN);
+		p += ETH_GSTRING_LEN;
+	}
+}
+
+static int xgene_get_sset_count(struct net_device *ndev, int sset)
+{
+	if (sset != ETH_SS_STATS)
+		return -EINVAL;
+
+	return XGENE_STATS_LEN;
+}
+
+static void xgene_get_ethtool_stats(struct net_device *ndev,
+				    struct ethtool_stats *dummy,
+				    u64 *data)
+{
+	void *pdata = netdev_priv(ndev);
+	int i;
+
+	for (i = 0; i < XGENE_STATS_LEN; i++)
+		*data++ = *(u64 *)(pdata + gstrings_stats[i].offset);
+}
+
+static const struct ethtool_ops xgene_ethtool_ops = {
+	.get_drvinfo = xgene_get_drvinfo,
+	.get_settings = xgene_get_settings,
+	.set_settings = xgene_set_settings,
+	.get_link = ethtool_op_get_link,
+	.get_strings = xgene_get_strings,
+	.get_sset_count = xgene_get_sset_count,
+	.get_ethtool_stats = xgene_get_ethtool_stats
+};
+
+void xgene_enet_set_ethtool_ops(struct net_device *ndev)
+{
+	ndev->ethtool_ops = &xgene_ethtool_ops;
+}
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
new file mode 100644
index 0000000..812d8d6
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -0,0 +1,728 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Ravi Patel <rapatel@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "xgene_enet_main.h"
+#include "xgene_enet_hw.h"
+
+static void xgene_enet_ring_init(struct xgene_enet_desc_ring *ring)
+{
+	u32 *ring_cfg = ring->state;
+	u64 addr = ring->dma;
+	enum xgene_enet_ring_cfgsize cfgsize = ring->cfgsize;
+
+	ring_cfg[4] |= (1 << SELTHRSH_POS) &
+			CREATE_MASK(SELTHRSH_POS, SELTHRSH_LEN);
+	ring_cfg[3] |= ACCEPTLERR;
+	ring_cfg[2] |= QCOHERENT;
+
+	addr >>= 8;
+	ring_cfg[2] |= (addr << RINGADDRL_POS) &
+			CREATE_MASK_ULL(RINGADDRL_POS, RINGADDRL_LEN);
+	addr >>= RINGADDRL_LEN;
+	ring_cfg[3] |= addr & CREATE_MASK_ULL(RINGADDRH_POS, RINGADDRH_LEN);
+	ring_cfg[3] |= ((u32)cfgsize << RINGSIZE_POS) &
+			CREATE_MASK(RINGSIZE_POS, RINGSIZE_LEN);
+}
+
+static void xgene_enet_ring_set_type(struct xgene_enet_desc_ring *ring)
+{
+	u32 *ring_cfg = ring->state;
+	bool is_bufpool;
+	u32 val;
+
+	is_bufpool = xgene_enet_is_bufpool(ring->id);
+	val = (is_bufpool) ? RING_BUFPOOL : RING_REGULAR;
+	ring_cfg[4] |= (val << RINGTYPE_POS) &
+			CREATE_MASK(RINGTYPE_POS, RINGTYPE_LEN);
+
+	if (is_bufpool) {
+		ring_cfg[3] |= (BUFPOOL_MODE << RINGMODE_POS) &
+				CREATE_MASK(RINGMODE_POS, RINGMODE_LEN);
+	}
+}
+
+static void xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring *ring)
+{
+	u32 *ring_cfg = ring->state;
+
+	ring_cfg[3] |= RECOMBBUF;
+	ring_cfg[3] |= (0xf << RECOMTIMEOUTL_POS) &
+			CREATE_MASK(RECOMTIMEOUTL_POS, RECOMTIMEOUTL_LEN);
+	ring_cfg[4] |= 0x7 & CREATE_MASK(RECOMTIMEOUTH_POS, RECOMTIMEOUTH_LEN);
+}
+
+static void xgene_enet_ring_wr32(struct xgene_enet_desc_ring *ring,
+				 u32 offset, u32 data)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
+
+	iowrite32(data, pdata->ring_csr_addr + offset);
+}
+
+static void xgene_enet_ring_rd32(struct xgene_enet_desc_ring *ring,
+				 u32 offset, u32 *data)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
+
+	*data = ioread32(pdata->ring_csr_addr + offset);
+}
+
+static void xgene_enet_write_ring_state(struct xgene_enet_desc_ring *ring)
+{
+	int i;
+
+	xgene_enet_ring_wr32(ring, CSR_RING_CONFIG, ring->num);
+	for (i = 0; i < NUM_RING_CONFIG; i++) {
+		xgene_enet_ring_wr32(ring, CSR_RING_WR_BASE + (i * 4),
+				     ring->state[i]);
+	}
+}
+
+static void xgene_enet_clr_ring_state(struct xgene_enet_desc_ring *ring)
+{
+	memset(ring->state, 0, sizeof(u32) * NUM_RING_CONFIG);
+	xgene_enet_write_ring_state(ring);
+}
+
+static void xgene_enet_set_ring_state(struct xgene_enet_desc_ring *ring)
+{
+	xgene_enet_ring_set_type(ring);
+
+	if (xgene_enet_ring_owner(ring->id) == RING_OWNER_ETH0)
+		xgene_enet_ring_set_recombbuf(ring);
+
+	xgene_enet_ring_init(ring);
+	xgene_enet_write_ring_state(ring);
+}
+
+static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring)
+{
+	u32 ring_id_val, ring_id_buf;
+	bool is_bufpool;
+
+	is_bufpool = xgene_enet_is_bufpool(ring->id);
+
+	ring_id_val = ring->id & GENMASK(9, 0);
+	ring_id_val |= OVERWRITE;
+
+	ring_id_buf = (ring->num << 9) & GENMASK(18, 9);
+	ring_id_buf |= PREFETCH_BUF_EN;
+	if (is_bufpool)
+		ring_id_buf |= IS_BUFFER_POOL;
+
+	xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id_val);
+	xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, ring_id_buf);
+}
+
+static void xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring *ring)
+{
+	u32 ring_id;
+
+	ring_id = ring->id | OVERWRITE;
+	xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id);
+	xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, 0);
+}
+
+struct xgene_enet_desc_ring *xgene_enet_setup_ring(
+					struct xgene_enet_desc_ring *ring)
+{
+	u32 size = ring->size;
+	u32 i, data;
+	bool is_bufpool;
+
+	xgene_enet_clr_ring_state(ring);
+	xgene_enet_set_ring_state(ring);
+	xgene_enet_set_ring_id(ring);
+
+	ring->slots = xgene_enet_get_numslots(ring->id, size);
+
+	is_bufpool = xgene_enet_is_bufpool(ring->id);
+	if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
+		return ring;
+
+	for (i = 0; i < ring->slots; i++)
+		xgene_enet_mark_desc_slot_empty(&ring->raw_desc[i]);
+
+	xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
+	data |= BIT(31 - xgene_enet_ring_bufnum(ring->id));
+	xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
+
+	return ring;
+}
+
+void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring)
+{
+	u32 data;
+	bool is_bufpool;
+
+	is_bufpool = xgene_enet_is_bufpool(ring->id);
+	if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
+		goto out;
+
+	xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
+	data &= ~BIT(31 - xgene_enet_ring_bufnum(ring->id));
+	xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
+
+out:
+	xgene_enet_clr_desc_ring_id(ring);
+	xgene_enet_clr_ring_state(ring);
+}
+
+void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
+			    struct xgene_enet_pdata *pdata,
+			    enum xgene_enet_err_code status)
+{
+	struct rtnl_link_stats64 *stats = &pdata->stats;
+
+	switch (status) {
+	case INGRESS_CRC:
+		stats->rx_crc_errors++;
+		break;
+	case INGRESS_CHECKSUM:
+	case INGRESS_CHECKSUM_COMPUTE:
+		stats->rx_errors++;
+		break;
+	case INGRESS_TRUNC_FRAME:
+		stats->rx_frame_errors++;
+		break;
+	case INGRESS_PKT_LEN:
+		stats->rx_length_errors++;
+		break;
+	case INGRESS_PKT_UNDER:
+		stats->rx_frame_errors++;
+		break;
+	case INGRESS_FIFO_OVERRUN:
+		stats->rx_fifo_errors++;
+		break;
+	default:
+		break;
+	}
+}
+
+static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata,
+			      u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_csr_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata,
+				  u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_ring_if_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata,
+				   u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_diag_csr_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
+				  u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
+				   void __iomem *cmd, void __iomem *cmd_done,
+				   u32 wr_addr, u32 wr_data)
+{
+	u32 done;
+	u8 wait = 10;
+
+	iowrite32(wr_addr, addr);
+	iowrite32(wr_data, wr);
+	iowrite32(XGENE_ENET_WR_CMD, cmd);
+
+	/* wait for write command to complete */
+	while (!(done = ioread32(cmd_done)) && wait--)
+		udelay(1);
+
+	if (!done)
+		return false;
+
+	iowrite32(0, cmd);
+
+	return true;
+}
+
+static void xgene_enet_wr_mcx_mac(struct xgene_enet_pdata *pdata,
+				  u32 wr_addr, u32 wr_data)
+{
+	void __iomem *addr, *wr, *cmd, *cmd_done;
+
+	addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+	wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
+	cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+	cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+	if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
+		netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
+			   wr_addr);
+}
+
+static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
+			      u32 offset, u32 *val)
+{
+	void __iomem *addr = pdata->eth_csr_addr + offset;
+
+	*val = ioread32(addr);
+}
+
+static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata,
+				   u32 offset, u32 *val)
+{
+	void __iomem *addr = pdata->eth_diag_csr_addr + offset;
+
+	*val = ioread32(addr);
+}
+
+static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata,
+				  u32 offset, u32 *val)
+{
+	void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
+
+	*val = ioread32(addr);
+}
+
+static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
+				   void __iomem *cmd, void __iomem *cmd_done,
+				   u32 rd_addr, u32 *rd_data)
+{
+	u32 done;
+	u8 wait = 10;
+
+	iowrite32(rd_addr, addr);
+	iowrite32(XGENE_ENET_RD_CMD, cmd);
+
+	/* wait for read command to complete */
+	while (!(done = ioread32(cmd_done)) && wait--)
+		udelay(1);
+
+	if (!done)
+		return false;
+
+	*rd_data = ioread32(rd);
+	iowrite32(0, cmd);
+
+	return true;
+}
+
+static void xgene_enet_rd_mcx_mac(struct xgene_enet_pdata *pdata,
+				  u32 rd_addr, u32 *rd_data)
+{
+	void __iomem *addr, *rd, *cmd, *cmd_done;
+
+	addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+	rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
+	cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+	cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+	if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
+		netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
+			   rd_addr);
+}
+
+static int xgene_mii_phy_write(struct xgene_enet_pdata *pdata, int phy_id,
+			       u32 reg, u16 data)
+{
+	u32 addr = 0, wr_data = 0;
+	u32 done;
+	u8 wait = 10;
+
+	PHY_ADDR_SET(&addr, phy_id);
+	REG_ADDR_SET(&addr, reg);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr);
+
+	PHY_CONTROL_SET(&wr_data, data);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONTROL_ADDR, wr_data);
+	do {
+		usleep_range(5, 10);
+		xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
+	} while ((done & BUSY_MASK) && wait--);
+
+	if (done & BUSY_MASK) {
+		netdev_err(pdata->ndev, "MII_MGMT write failed\n");
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int xgene_mii_phy_read(struct xgene_enet_pdata *pdata,
+			      u8 phy_id, u32 reg)
+{
+	u32 addr = 0;
+	u32 data, done;
+	u8 wait = 10;
+
+	PHY_ADDR_SET(&addr, phy_id);
+	REG_ADDR_SET(&addr, reg);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
+	do {
+		usleep_range(5, 10);
+		xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
+	} while ((done & BUSY_MASK) && wait--);
+
+	if (done & BUSY_MASK) {
+		netdev_err(pdata->ndev, "MII_MGMT read failed\n");
+		return -EBUSY;
+	}
+
+	xgene_enet_rd_mcx_mac(pdata, MII_MGMT_STATUS_ADDR, &data);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, 0);
+
+	return data;
+}
+
+void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
+{
+	u32 addr0, addr1;
+	u8 *dev_addr = pdata->ndev->dev_addr;
+
+	addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
+		(dev_addr[1] << 8) | dev_addr[0];
+	addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
+	addr1 |= pdata->phy_addr & 0xFFFF;
+
+	xgene_enet_wr_mcx_mac(pdata, STATION_ADDR0_ADDR, addr0);
+	xgene_enet_wr_mcx_mac(pdata, STATION_ADDR1_ADDR, addr1);
+}
+
+static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
+{
+	struct net_device *ndev = pdata->ndev;
+	u32 data;
+	u8 wait = 10;
+
+	xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
+	do {
+		usleep_range(100, 110);
+		xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data);
+	} while ((data != 0xffffffff) && wait--);
+
+	if (data != 0xffffffff) {
+		netdev_err(ndev, "Failed to release memory from shutdown\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
+{
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
+}
+
+void xgene_gmac_init(struct xgene_enet_pdata *pdata, int speed)
+{
+	u32 value, mc2;
+	u32 intf_ctl, rgmii;
+	u32 icm0, icm2;
+
+	xgene_gmac_reset(pdata);
+
+	xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0);
+	xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2);
+	xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_2_ADDR, &mc2);
+	xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl);
+	xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
+
+	switch (speed) {
+	case SPEED_10:
+		ENET_INTERFACE_MODE2_SET(&mc2, 1);
+		CFG_MACMODE_SET(&icm0, 0);
+		CFG_WAITASYNCRD_SET(&icm2, 500);
+		rgmii &= ~CFG_SPEED_1250;
+		break;
+	case SPEED_100:
+		ENET_INTERFACE_MODE2_SET(&mc2, 1);
+		intf_ctl |= ENET_LHD_MODE;
+		CFG_MACMODE_SET(&icm0, 1);
+		CFG_WAITASYNCRD_SET(&icm2, 80);
+		rgmii &= ~CFG_SPEED_1250;
+		break;
+	default:
+		ENET_INTERFACE_MODE2_SET(&mc2, 2);
+		intf_ctl |= ENET_GHD_MODE;
+		CFG_TXCLK_MUXSEL0_SET(&rgmii, 4);
+		xgene_enet_rd_csr(pdata, DEBUG_REG_ADDR, &value);
+		value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
+		xgene_enet_wr_csr(pdata, DEBUG_REG_ADDR, value);
+		break;
+	}
+
+	mc2 |= FULL_DUPLEX2;
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
+	xgene_enet_wr_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
+
+	xgene_gmac_set_mac_addr(pdata);
+
+	/* Adjust MDC clock frequency */
+	xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &value);
+	MGMT_CLOCK_SEL_SET(&value, 7);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
+
+	/* Enable drop if bufpool not available */
+	xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value);
+	value |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
+	xgene_enet_wr_csr(pdata, RSIF_CONFIG_REG_ADDR, value);
+
+	/* Rtype should be copied from FP */
+	xgene_enet_wr_csr(pdata, RSIF_RAM_DBG_REG0_ADDR, 0);
+	xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii);
+
+	/* Rx-Tx traffic resume */
+	xgene_enet_wr_csr(pdata, CFG_LINK_AGGR_RESUME_0_ADDR, TX_PORT0);
+
+	xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, icm0);
+	xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, icm2);
+
+	xgene_enet_rd_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, &value);
+	value &= ~TX_DV_GATE_EN0;
+	value &= ~RX_DV_GATE_EN0;
+	value |= RESUME_RX0;
+	xgene_enet_wr_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, value);
+
+	xgene_enet_wr_csr(pdata, CFG_BYPASS_ADDR, RESUME_TX);
+}
+
+static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
+{
+	u32 val = 0xffffffff;
+
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, val);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, val);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, val);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, val);
+}
+
+void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
+			   u32 dst_ring_num, u16 bufpool_id)
+{
+	u32 cb;
+	u32 fpsel;
+
+	fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
+
+	xgene_enet_rd_csr(pdata, CLE_BYPASS_REG0_0_ADDR, &cb);
+	cb |= CFG_CLE_BYPASS_EN0;
+	CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
+	xgene_enet_wr_csr(pdata, CLE_BYPASS_REG0_0_ADDR, cb);
+
+	xgene_enet_rd_csr(pdata, CLE_BYPASS_REG1_0_ADDR, &cb);
+	CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
+	CFG_CLE_FPSEL0_SET(&cb, fpsel);
+	xgene_enet_wr_csr(pdata, CLE_BYPASS_REG1_0_ADDR, cb);
+}
+
+void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
+}
+
+void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
+}
+
+void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
+}
+
+void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
+	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
+}
+
+void xgene_enet_reset(struct xgene_enet_pdata *pdata)
+{
+	u32 val;
+
+	clk_prepare_enable(pdata->clk);
+	clk_disable_unprepare(pdata->clk);
+	clk_prepare_enable(pdata->clk);
+	xgene_enet_ecc_init(pdata);
+	xgene_enet_config_ring_if_assoc(pdata);
+
+	/* Enable auto-incr for scanning */
+	xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &val);
+	val |= SCAN_AUTO_INCR;
+	MGMT_CLOCK_SEL_SET(&val, 1);
+	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, val);
+}
+
+void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
+{
+	clk_disable_unprepare(pdata->clk);
+}
+
+static int xgene_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+	struct xgene_enet_pdata *pdata = bus->priv;
+	u32 val;
+
+	val = xgene_mii_phy_read(pdata, mii_id, regnum);
+	netdev_dbg(pdata->ndev, "mdio_rd: bus=%d reg=%d val=%x\n",
+		   mii_id, regnum, val);
+
+	return val;
+}
+
+static int xgene_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+				 u16 val)
+{
+	struct xgene_enet_pdata *pdata = bus->priv;
+
+	netdev_dbg(pdata->ndev, "mdio_wr: bus=%d reg=%d val=%x\n",
+		   mii_id, regnum, val);
+	return xgene_mii_phy_write(pdata, mii_id, regnum, val);
+}
+
+static void xgene_enet_adjust_link(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct phy_device *phydev = pdata->phy_dev;
+
+	if (phydev->link) {
+		if (pdata->phy_speed != phydev->speed) {
+			xgene_gmac_init(pdata, phydev->speed);
+			xgene_gmac_rx_enable(pdata);
+			xgene_gmac_tx_enable(pdata);
+			pdata->phy_speed = phydev->speed;
+			phy_print_status(phydev);
+		}
+	} else {
+		xgene_gmac_rx_disable(pdata);
+		xgene_gmac_tx_disable(pdata);
+		pdata->phy_speed = SPEED_UNKNOWN;
+		phy_print_status(phydev);
+	}
+}
+
+static int xgene_enet_phy_connect(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct device_node *phy_np;
+	struct phy_device *phy_dev;
+	struct device *dev = &pdata->pdev->dev;
+
+	phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0);
+	if (!phy_np) {
+		netdev_dbg(ndev, "No phy-handle found\n");
+		return -ENODEV;
+	}
+
+	phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link,
+				 0, pdata->phy_mode);
+	if (!phy_dev) {
+		netdev_err(ndev, "Could not connect to PHY\n");
+		return  -ENODEV;
+	}
+
+	pdata->phy_speed = SPEED_UNKNOWN;
+	phy_dev->supported &= ~SUPPORTED_10baseT_Half &
+			      ~SUPPORTED_100baseT_Half &
+			      ~SUPPORTED_1000baseT_Half;
+	phy_dev->advertising = phy_dev->supported;
+	pdata->phy_dev = phy_dev;
+
+	return 0;
+}
+
+int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
+{
+	struct net_device *ndev = pdata->ndev;
+	struct device *dev = &pdata->pdev->dev;
+	struct device_node *child_np;
+	struct device_node *mdio_np = NULL;
+	struct mii_bus *mdio_bus;
+	int ret;
+
+	for_each_child_of_node(dev->of_node, child_np) {
+		if (of_device_is_compatible(child_np, "apm,xgene-mdio")) {
+			mdio_np = child_np;
+			break;
+		}
+	}
+
+	if (!mdio_np) {
+		netdev_dbg(ndev, "No mdio node in the dts\n");
+		return -ENXIO;
+	}
+
+	mdio_bus = mdiobus_alloc();
+	if (!mdio_bus)
+		return -ENOMEM;
+
+	mdio_bus->name = "APM X-Gene MDIO bus";
+	mdio_bus->read = xgene_enet_mdio_read;
+	mdio_bus->write = xgene_enet_mdio_write;
+	snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-%s", "xgene-mii",
+		 ndev->name);
+
+	mdio_bus->priv = pdata;
+	mdio_bus->parent = &ndev->dev;
+
+	ret = of_mdiobus_register(mdio_bus, mdio_np);
+	if (ret) {
+		netdev_err(ndev, "Failed to register MDIO bus\n");
+		mdiobus_free(mdio_bus);
+		return ret;
+	}
+	pdata->mdio_bus = mdio_bus;
+
+	ret = xgene_enet_phy_connect(ndev);
+	if (ret)
+		xgene_enet_mdio_remove(pdata);
+
+	return ret;
+}
+
+void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata)
+{
+	mdiobus_unregister(pdata->mdio_bus);
+	mdiobus_free(pdata->mdio_bus);
+	pdata->mdio_bus = NULL;
+}
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
new file mode 100644
index 0000000..371e7a5
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
@@ -0,0 +1,337 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Ravi Patel <rapatel@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_HW_H__
+#define __XGENE_ENET_HW_H__
+
+#include "xgene_enet_main.h"
+
+struct xgene_enet_pdata;
+struct xgene_enet_stats;
+
+/* clears and then set bits */
+static inline void xgene_set_bits(u32 *dst, u32 val, u32 start, u32 len)
+{
+	u32 end = start + len - 1;
+	u32 mask = GENMASK(end, start);
+
+	*dst &= ~mask;
+	*dst |= (val << start) & mask;
+}
+
+static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
+{
+	return (val & GENMASK(end, start)) >> start;
+}
+
+#define CSR_RING_ID		0x0008
+#define OVERWRITE		BIT(31)
+#define IS_BUFFER_POOL		BIT(20)
+#define PREFETCH_BUF_EN		BIT(21)
+#define CSR_RING_ID_BUF		0x000c
+#define CSR_RING_NE_INT_MODE	0x017c
+#define CSR_RING_CONFIG		0x006c
+#define CSR_RING_WR_BASE	0x0070
+#define NUM_RING_CONFIG		5
+#define BUFPOOL_MODE		3
+#define RM3			3
+#define INC_DEC_CMD_ADDR	0x002c
+#define UDP_HDR_SIZE		2
+#define BUF_LEN_CODE_2K		0x5000
+
+#define CREATE_MASK(pos, len)		GENMASK((pos)+(len)-1, (pos))
+#define CREATE_MASK_ULL(pos, len)	GENMASK_ULL((pos)+(len)-1, (pos))
+
+/* Empty slot soft signature */
+#define EMPTY_SLOT_INDEX	1
+#define EMPTY_SLOT		~0ULL
+
+#define WORK_DESC_SIZE		32
+#define BUFPOOL_DESC_SIZE	16
+
+#define RING_OWNER_MASK		GENMASK(9, 6)
+#define RING_BUFNUM_MASK	GENMASK(5, 0)
+
+#define SELTHRSH_POS		3
+#define SELTHRSH_LEN		3
+#define RINGADDRL_POS		5
+#define RINGADDRL_LEN		27
+#define RINGADDRH_POS		0
+#define RINGADDRH_LEN		6
+#define RINGSIZE_POS		23
+#define RINGSIZE_LEN		3
+#define RINGTYPE_POS		19
+#define RINGTYPE_LEN		2
+#define RINGMODE_POS		20
+#define RINGMODE_LEN		3
+#define RECOMTIMEOUTL_POS	28
+#define RECOMTIMEOUTL_LEN	3
+#define RECOMTIMEOUTH_POS	0
+#define RECOMTIMEOUTH_LEN	2
+#define NUMMSGSINQ_POS		1
+#define NUMMSGSINQ_LEN		16
+#define ACCEPTLERR		BIT(19)
+#define QCOHERENT		BIT(4)
+#define RECOMBBUF		BIT(27)
+
+#define BLOCK_ETH_CSR_OFFSET		0x2000
+#define BLOCK_ETH_RING_IF_OFFSET	0x9000
+#define BLOCK_ETH_CLKRST_CSR_OFFSET	0xC000
+#define BLOCK_ETH_DIAG_CSR_OFFSET	0xD000
+
+#define BLOCK_ETH_MAC_OFFSET		0x0000
+#define BLOCK_ETH_STATS_OFFSET		0x0014
+#define BLOCK_ETH_MAC_CSR_OFFSET	0x2800
+
+#define MAC_ADDR_REG_OFFSET		0x00
+#define MAC_COMMAND_REG_OFFSET		0x04
+#define MAC_WRITE_REG_OFFSET		0x08
+#define MAC_READ_REG_OFFSET		0x0c
+#define MAC_COMMAND_DONE_REG_OFFSET	0x10
+
+#define STAT_ADDR_REG_OFFSET		0x00
+#define STAT_COMMAND_REG_OFFSET		0x04
+#define STAT_WRITE_REG_OFFSET		0x08
+#define STAT_READ_REG_OFFSET		0x0c
+#define STAT_COMMAND_DONE_REG_OFFSET	0x10
+
+#define MII_MGMT_CONFIG_ADDR		0x20
+#define MII_MGMT_COMMAND_ADDR		0x24
+#define MII_MGMT_ADDRESS_ADDR		0x28
+#define MII_MGMT_CONTROL_ADDR		0x2c
+#define MII_MGMT_STATUS_ADDR		0x30
+#define MII_MGMT_INDICATORS_ADDR	0x34
+
+#define BUSY_MASK			BIT(0)
+#define READ_CYCLE_MASK			BIT(0)
+#define PHY_CONTROL_SET(dst, val)	xgene_set_bits(dst, val, 0, 16)
+
+#define ENET_SPARE_CFG_REG_ADDR		0x0750
+#define RSIF_CONFIG_REG_ADDR		0x0010
+#define RSIF_RAM_DBG_REG0_ADDR		0x0048
+#define RGMII_REG_0_ADDR		0x07e0
+#define CFG_LINK_AGGR_RESUME_0_ADDR	0x07c8
+#define DEBUG_REG_ADDR			0x0700
+#define CFG_BYPASS_ADDR			0x0294
+#define CLE_BYPASS_REG0_0_ADDR		0x0490
+#define CLE_BYPASS_REG1_0_ADDR		0x0494
+#define CFG_RSIF_FPBUFF_TIMEOUT_EN	BIT(31)
+#define RESUME_TX			BIT(0)
+#define CFG_SPEED_1250			BIT(24)
+#define TX_PORT0			BIT(0)
+#define CFG_BYPASS_UNISEC_TX		BIT(2)
+#define CFG_BYPASS_UNISEC_RX		BIT(1)
+#define CFG_CLE_BYPASS_EN0		BIT(31)
+#define CFG_TXCLK_MUXSEL0_SET(dst, val)	xgene_set_bits(dst, val, 29, 3)
+
+#define CFG_CLE_IP_PROTOCOL0_SET(dst, val)	xgene_set_bits(dst, val, 16, 2)
+#define CFG_CLE_DSTQID0_SET(dst, val)		xgene_set_bits(dst, val, 0, 12)
+#define CFG_CLE_FPSEL0_SET(dst, val)		xgene_set_bits(dst, val, 16, 4)
+#define CFG_MACMODE_SET(dst, val)		xgene_set_bits(dst, val, 18, 2)
+#define CFG_WAITASYNCRD_SET(dst, val)		xgene_set_bits(dst, val, 0, 16)
+#define ICM_CONFIG0_REG_0_ADDR		0x0400
+#define ICM_CONFIG2_REG_0_ADDR		0x0410
+#define RX_DV_GATE_REG_0_ADDR		0x05fc
+#define TX_DV_GATE_EN0			BIT(2)
+#define RX_DV_GATE_EN0			BIT(1)
+#define RESUME_RX0			BIT(0)
+#define ENET_CFGSSQMIWQASSOC_ADDR		0xe0
+#define ENET_CFGSSQMIFPQASSOC_ADDR		0xdc
+#define ENET_CFGSSQMIQMLITEFPQASSOC_ADDR	0xf0
+#define ENET_CFGSSQMIQMLITEWQASSOC_ADDR		0xf4
+#define ENET_CFG_MEM_RAM_SHUTDOWN_ADDR		0x70
+#define ENET_BLOCK_MEM_RDY_ADDR			0x74
+#define MAC_CONFIG_1_ADDR			0x00
+#define MAC_CONFIG_2_ADDR			0x04
+#define MAX_FRAME_LEN_ADDR			0x10
+#define INTERFACE_CONTROL_ADDR			0x38
+#define STATION_ADDR0_ADDR			0x40
+#define STATION_ADDR1_ADDR			0x44
+#define PHY_ADDR_SET(dst, val)			xgene_set_bits(dst, val, 8, 5)
+#define REG_ADDR_SET(dst, val)			xgene_set_bits(dst, val, 0, 5)
+#define ENET_INTERFACE_MODE2_SET(dst, val)	xgene_set_bits(dst, val, 8, 2)
+#define MGMT_CLOCK_SEL_SET(dst, val)		xgene_set_bits(dst, val, 0, 3)
+#define SOFT_RESET1			BIT(31)
+#define TX_EN				BIT(0)
+#define RX_EN				BIT(2)
+#define ENET_LHD_MODE			BIT(25)
+#define ENET_GHD_MODE			BIT(26)
+#define FULL_DUPLEX2			BIT(0)
+#define SCAN_AUTO_INCR			BIT(5)
+#define TBYT_ADDR			0x38
+#define TPKT_ADDR			0x39
+#define TDRP_ADDR			0x45
+#define TFCS_ADDR			0x47
+#define TUND_ADDR			0x4a
+
+#define TSO_IPPROTO_TCP			1
+#define	FULL_DUPLEX			2
+
+#define USERINFO_POS			0
+#define USERINFO_LEN			32
+#define FPQNUM_POS			32
+#define FPQNUM_LEN			12
+#define LERR_POS			60
+#define LERR_LEN			3
+#define STASH_POS			52
+#define STASH_LEN			2
+#define BUFDATALEN_POS			48
+#define BUFDATALEN_LEN			12
+#define DATAADDR_POS			0
+#define DATAADDR_LEN			42
+#define COHERENT_POS			63
+#define HENQNUM_POS			48
+#define HENQNUM_LEN			12
+#define TYPESEL_POS			44
+#define TYPESEL_LEN			4
+#define ETHHDR_POS			12
+#define ETHHDR_LEN			8
+#define IC_POS				35	/* Insert CRC */
+#define TCPHDR_POS			0
+#define TCPHDR_LEN			6
+#define IPHDR_POS			6
+#define IPHDR_LEN			6
+#define EC_POS				22	/* Enable checksum */
+#define EC_LEN				1
+#define IS_POS				24	/* IP protocol select */
+#define IS_LEN				1
+#define TYPE_ETH_WORK_MESSAGE_POS	44
+
+struct xgene_enet_raw_desc {
+	__le64 m0;
+	__le64 m1;
+	__le64 m2;
+	__le64 m3;
+};
+
+struct xgene_enet_raw_desc16 {
+	__le64 m0;
+	__le64 m1;
+};
+
+static inline void xgene_enet_mark_desc_slot_empty(void *desc_slot_ptr)
+{
+	__le64 *desc_slot = desc_slot_ptr;
+
+	desc_slot[EMPTY_SLOT_INDEX] = cpu_to_le64(EMPTY_SLOT);
+}
+
+static inline bool xgene_enet_is_desc_slot_empty(void *desc_slot_ptr)
+{
+	__le64 *desc_slot = desc_slot_ptr;
+
+	return (desc_slot[EMPTY_SLOT_INDEX] == cpu_to_le64(EMPTY_SLOT));
+}
+
+enum xgene_enet_ring_cfgsize {
+	RING_CFGSIZE_512B,
+	RING_CFGSIZE_2KB,
+	RING_CFGSIZE_16KB,
+	RING_CFGSIZE_64KB,
+	RING_CFGSIZE_512KB,
+	RING_CFGSIZE_INVALID
+};
+
+enum xgene_enet_ring_type {
+	RING_DISABLED,
+	RING_REGULAR,
+	RING_BUFPOOL
+};
+
+enum xgene_ring_owner {
+	RING_OWNER_ETH0,
+	RING_OWNER_CPU = 15,
+	RING_OWNER_INVALID
+};
+
+enum xgene_enet_ring_bufnum {
+	RING_BUFNUM_REGULAR = 0x0,
+	RING_BUFNUM_BUFPOOL = 0x20,
+	RING_BUFNUM_INVALID
+};
+
+enum xgene_enet_cmd {
+	XGENE_ENET_WR_CMD = BIT(31),
+	XGENE_ENET_RD_CMD = BIT(30)
+};
+
+enum xgene_enet_err_code {
+	HBF_READ_DATA = 3,
+	HBF_LL_READ = 4,
+	BAD_WORK_MSG = 6,
+	BUFPOOL_TIMEOUT = 15,
+	INGRESS_CRC = 16,
+	INGRESS_CHECKSUM = 17,
+	INGRESS_TRUNC_FRAME = 18,
+	INGRESS_PKT_LEN = 19,
+	INGRESS_PKT_UNDER = 20,
+	INGRESS_FIFO_OVERRUN = 21,
+	INGRESS_CHECKSUM_COMPUTE = 26,
+	ERR_CODE_INVALID
+};
+
+static inline enum xgene_ring_owner xgene_enet_ring_owner(u16 id)
+{
+	return (id & RING_OWNER_MASK) >> 6;
+}
+
+static inline u8 xgene_enet_ring_bufnum(u16 id)
+{
+	return id & RING_BUFNUM_MASK;
+}
+
+static inline bool xgene_enet_is_bufpool(u16 id)
+{
+	return ((id & RING_BUFNUM_MASK) >= 0x20) ? true : false;
+}
+
+static inline u16 xgene_enet_get_numslots(u16 id, u32 size)
+{
+	bool is_bufpool = xgene_enet_is_bufpool(id);
+
+	return (is_bufpool) ? size / BUFPOOL_DESC_SIZE :
+		      size / WORK_DESC_SIZE;
+}
+
+struct xgene_enet_desc_ring *xgene_enet_setup_ring(
+		struct xgene_enet_desc_ring *ring);
+void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring);
+void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
+			    struct xgene_enet_pdata *pdata,
+			    enum xgene_enet_err_code status);
+
+void xgene_enet_reset(struct xgene_enet_pdata *priv);
+void xgene_gmac_reset(struct xgene_enet_pdata *priv);
+void xgene_gmac_init(struct xgene_enet_pdata *priv, int speed);
+void xgene_gmac_tx_enable(struct xgene_enet_pdata *priv);
+void xgene_gmac_rx_enable(struct xgene_enet_pdata *priv);
+void xgene_gmac_tx_disable(struct xgene_enet_pdata *priv);
+void xgene_gmac_rx_disable(struct xgene_enet_pdata *priv);
+void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata);
+void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
+			   u32 dst_ring_num, u16 bufpool_id);
+void xgene_gport_shutdown(struct xgene_enet_pdata *priv);
+void xgene_gmac_get_tx_stats(struct xgene_enet_pdata *pdata);
+
+int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata);
+void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
+
+#endif /* __XGENE_ENET_HW_H__ */
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
new file mode 100644
index 0000000..e1a8f4e
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -0,0 +1,954 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Ravi Patel <rapatel@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "xgene_enet_main.h"
+#include "xgene_enet_hw.h"
+
+static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool)
+{
+	struct xgene_enet_raw_desc16 *raw_desc;
+	int i;
+
+	for (i = 0; i < buf_pool->slots; i++) {
+		raw_desc = &buf_pool->raw_desc16[i];
+
+		/* Hardware expects descriptor in little endian format */
+		raw_desc->m0 = cpu_to_le64(i |
+				SET_VAL(FPQNUM, buf_pool->dst_ring_num) |
+				SET_VAL(STASH, 3));
+	}
+}
+
+static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool,
+				     u32 nbuf)
+{
+	struct sk_buff *skb;
+	struct xgene_enet_raw_desc16 *raw_desc;
+	struct net_device *ndev;
+	struct device *dev;
+	dma_addr_t dma_addr;
+	u32 tail = buf_pool->tail;
+	u32 slots = buf_pool->slots - 1;
+	u16 bufdatalen, len;
+	int i;
+
+	ndev = buf_pool->ndev;
+	dev = ndev_to_dev(buf_pool->ndev);
+	bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0));
+	len = XGENE_ENET_MAX_MTU;
+
+	for (i = 0; i < nbuf; i++) {
+		raw_desc = &buf_pool->raw_desc16[tail];
+
+		skb = netdev_alloc_skb_ip_align(ndev, len);
+		if (unlikely(!skb))
+			return -ENOMEM;
+		buf_pool->rx_skb[tail] = skb;
+
+		dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE);
+		if (dma_mapping_error(dev, dma_addr)) {
+			netdev_err(ndev, "DMA mapping error\n");
+			dev_kfree_skb_any(skb);
+			return -EINVAL;
+		}
+
+		raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
+					   SET_VAL(BUFDATALEN, bufdatalen) |
+					   SET_BIT(COHERENT));
+		tail = (tail + 1) & slots;
+	}
+
+	iowrite32(nbuf, buf_pool->cmd);
+	buf_pool->tail = tail;
+
+	return 0;
+}
+
+static u16 xgene_enet_dst_ring_num(struct xgene_enet_desc_ring *ring)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
+
+	return ((u16)pdata->rm << 10) | ring->num;
+}
+
+static u8 xgene_enet_hdr_len(const void *data)
+{
+	const struct ethhdr *eth = data;
+
+	return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN;
+}
+
+static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring)
+{
+	u32 __iomem *cmd_base = ring->cmd_base;
+	u32 ring_state, num_msgs;
+
+	ring_state = ioread32(&cmd_base[1]);
+	num_msgs = ring_state & CREATE_MASK(NUMMSGSINQ_POS, NUMMSGSINQ_LEN);
+
+	return num_msgs >> NUMMSGSINQ_POS;
+}
+
+static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool)
+{
+	struct xgene_enet_raw_desc16 *raw_desc;
+	u32 slots = buf_pool->slots - 1;
+	u32 tail = buf_pool->tail;
+	u32 userinfo;
+	int i, len;
+
+	len = xgene_enet_ring_len(buf_pool);
+	for (i = 0; i < len; i++) {
+		tail = (tail - 1) & slots;
+		raw_desc = &buf_pool->raw_desc16[tail];
+
+		/* Hardware stores descriptor in little endian format */
+		userinfo = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
+		dev_kfree_skb_any(buf_pool->rx_skb[userinfo]);
+	}
+
+	iowrite32(-len, buf_pool->cmd);
+	buf_pool->tail = tail;
+}
+
+static irqreturn_t xgene_enet_rx_irq(const int irq, void *data)
+{
+	struct xgene_enet_desc_ring *rx_ring = data;
+
+	if (napi_schedule_prep(&rx_ring->napi)) {
+		disable_irq_nosync(irq);
+		__napi_schedule(&rx_ring->napi);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
+				    struct xgene_enet_raw_desc *raw_desc)
+{
+	struct sk_buff *skb;
+	struct device *dev;
+	u16 skb_index;
+	u8 status;
+	int ret = 0;
+
+	skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
+	skb = cp_ring->cp_skb[skb_index];
+
+	dev = ndev_to_dev(cp_ring->ndev);
+	dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
+			 GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)),
+			 DMA_TO_DEVICE);
+
+	/* Checking for error */
+	status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
+	if (unlikely(status > 2)) {
+		xgene_enet_parse_error(cp_ring, netdev_priv(cp_ring->ndev),
+				       status);
+		ret = -EIO;
+	}
+
+	if (likely(skb)) {
+		dev_kfree_skb_any(skb);
+	} else {
+		netdev_err(cp_ring->ndev, "completion skb is NULL\n");
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+static u64 xgene_enet_work_msg(struct sk_buff *skb)
+{
+	struct iphdr *iph;
+	u8 l3hlen, l4hlen = 0;
+	u8 csum_enable = 0;
+	u8 proto = 0;
+	u8 ethhdr;
+	u64 hopinfo;
+
+	if (unlikely(skb->protocol != htons(ETH_P_IP)) &&
+	    unlikely(skb->protocol != htons(ETH_P_8021Q)))
+		goto out;
+
+	if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM)))
+		goto out;
+
+	iph = ip_hdr(skb);
+	if (unlikely(ip_is_fragment(iph)))
+		goto out;
+
+	if (likely(iph->protocol == IPPROTO_TCP)) {
+		l4hlen = tcp_hdrlen(skb) >> 2;
+		csum_enable = 1;
+		proto = TSO_IPPROTO_TCP;
+	} else if (iph->protocol == IPPROTO_UDP) {
+		l4hlen = UDP_HDR_SIZE;
+		csum_enable = 1;
+	}
+out:
+	l3hlen = ip_hdrlen(skb) >> 2;
+	ethhdr = xgene_enet_hdr_len(skb->data);
+	hopinfo = SET_VAL(TCPHDR, l4hlen) |
+		  SET_VAL(IPHDR, l3hlen) |
+		  SET_VAL(ETHHDR, ethhdr) |
+		  SET_VAL(EC, csum_enable) |
+		  SET_VAL(IS, proto) |
+		  SET_BIT(IC) |
+		  SET_BIT(TYPE_ETH_WORK_MESSAGE);
+
+	return hopinfo;
+}
+
+static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring,
+				    struct sk_buff *skb)
+{
+	struct device *dev = ndev_to_dev(tx_ring->ndev);
+	struct xgene_enet_raw_desc *raw_desc;
+	dma_addr_t dma_addr;
+	u16 tail = tx_ring->tail;
+	u64 hopinfo;
+
+	raw_desc = &tx_ring->raw_desc[tail];
+	memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc));
+
+	dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, dma_addr)) {
+		netdev_err(tx_ring->ndev, "DMA mapping error\n");
+		return -EINVAL;
+	}
+
+	/* Hardware expects descriptor in little endian format */
+	raw_desc->m0 = cpu_to_le64(tail);
+	raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
+				   SET_VAL(BUFDATALEN, skb->len) |
+				   SET_BIT(COHERENT));
+	hopinfo = xgene_enet_work_msg(skb);
+	raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
+				   hopinfo);
+	tx_ring->cp_ring->cp_skb[tail] = skb;
+
+	return 0;
+}
+
+static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
+					 struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring;
+	struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring;
+	u32 tx_level, cq_level;
+
+	tx_level = xgene_enet_ring_len(tx_ring);
+	cq_level = xgene_enet_ring_len(cp_ring);
+	if (unlikely(tx_level > pdata->tx_qcnt_hi ||
+		     cq_level > pdata->cp_qcnt_hi)) {
+		netif_stop_queue(ndev);
+		return NETDEV_TX_BUSY;
+	}
+
+	if (xgene_enet_setup_tx_desc(tx_ring, skb)) {
+		dev_kfree_skb_any(skb);
+		return NETDEV_TX_OK;
+	}
+
+	iowrite32(1, tx_ring->cmd);
+	skb_tx_timestamp(skb);
+	tx_ring->tail = (tx_ring->tail + 1) & (tx_ring->slots - 1);
+
+	pdata->stats.tx_packets++;
+	pdata->stats.tx_bytes += skb->len;
+
+	return NETDEV_TX_OK;
+}
+
+static void xgene_enet_skip_csum(struct sk_buff *skb)
+{
+	struct iphdr *iph = ip_hdr(skb);
+
+	if (!ip_is_fragment(iph) ||
+	    (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP)) {
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+	}
+}
+
+static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring,
+			       struct xgene_enet_raw_desc *raw_desc)
+{
+	struct net_device *ndev;
+	struct xgene_enet_pdata *pdata;
+	struct device *dev;
+	struct xgene_enet_desc_ring *buf_pool;
+	u32 datalen, skb_index;
+	struct sk_buff *skb;
+	u8 status;
+	int ret = 0;
+
+	ndev = rx_ring->ndev;
+	pdata = netdev_priv(ndev);
+	dev = ndev_to_dev(rx_ring->ndev);
+	buf_pool = rx_ring->buf_pool;
+
+	dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
+			 XGENE_ENET_MAX_MTU, DMA_FROM_DEVICE);
+	skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
+	skb = buf_pool->rx_skb[skb_index];
+
+	/* checking for error */
+	status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
+	if (unlikely(status > 2)) {
+		dev_kfree_skb_any(skb);
+		xgene_enet_parse_error(rx_ring, netdev_priv(rx_ring->ndev),
+				       status);
+		pdata->stats.rx_dropped++;
+		ret = -EIO;
+		goto out;
+	}
+
+	/* strip off CRC as HW isn't doing this */
+	datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1));
+	datalen -= 4;
+	prefetch(skb->data - NET_IP_ALIGN);
+	skb_put(skb, datalen);
+
+	skb_checksum_none_assert(skb);
+	skb->protocol = eth_type_trans(skb, ndev);
+	if (likely((ndev->features & NETIF_F_IP_CSUM) &&
+		   skb->protocol == htons(ETH_P_IP))) {
+		xgene_enet_skip_csum(skb);
+	}
+
+	pdata->stats.rx_packets++;
+	pdata->stats.rx_bytes += datalen;
+	napi_gro_receive(&rx_ring->napi, skb);
+out:
+	if (--rx_ring->nbufpool == 0) {
+		ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL);
+		rx_ring->nbufpool = NUM_BUFPOOL;
+	}
+
+	return ret;
+}
+
+static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc)
+{
+	return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false;
+}
+
+static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
+				   int budget)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
+	struct xgene_enet_raw_desc *raw_desc;
+	u16 head = ring->head;
+	u16 slots = ring->slots - 1;
+	int ret, count = 0;
+
+	do {
+		raw_desc = &ring->raw_desc[head];
+		if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc)))
+			break;
+
+		if (is_rx_desc(raw_desc))
+			ret = xgene_enet_rx_frame(ring, raw_desc);
+		else
+			ret = xgene_enet_tx_completion(ring, raw_desc);
+		xgene_enet_mark_desc_slot_empty(raw_desc);
+
+		head = (head + 1) & slots;
+		count++;
+
+		if (ret)
+			break;
+	} while (--budget);
+
+	if (likely(count)) {
+		iowrite32(-count, ring->cmd);
+		ring->head = head;
+
+		if (netif_queue_stopped(ring->ndev)) {
+			if (xgene_enet_ring_len(ring) < pdata->cp_qcnt_low)
+				netif_wake_queue(ring->ndev);
+		}
+	}
+
+	return budget;
+}
+
+static int xgene_enet_napi(struct napi_struct *napi, const int budget)
+{
+	struct xgene_enet_desc_ring *ring;
+	int processed;
+
+	ring = container_of(napi, struct xgene_enet_desc_ring, napi);
+	processed = xgene_enet_process_ring(ring, budget);
+
+	if (processed != budget) {
+		napi_complete(napi);
+		enable_irq(ring->irq);
+	}
+
+	return processed;
+}
+
+static void xgene_enet_timeout(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+
+	xgene_gmac_reset(pdata);
+}
+
+static int xgene_enet_register_irq(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct device *dev = ndev_to_dev(ndev);
+	int ret;
+
+	ret = devm_request_irq(dev, pdata->rx_ring->irq, xgene_enet_rx_irq,
+			       IRQF_SHARED, ndev->name, pdata->rx_ring);
+	if (ret) {
+		netdev_err(ndev, "rx%d interrupt request failed\n",
+			   pdata->rx_ring->irq);
+	}
+
+	return ret;
+}
+
+static void xgene_enet_free_irq(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata;
+	struct device *dev;
+
+	pdata = netdev_priv(ndev);
+	dev = ndev_to_dev(ndev);
+	devm_free_irq(dev, pdata->rx_ring->irq, pdata->rx_ring);
+}
+
+static int xgene_enet_open(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	int ret;
+
+	xgene_gmac_tx_enable(pdata);
+	xgene_gmac_rx_enable(pdata);
+
+	ret = xgene_enet_register_irq(ndev);
+	if (ret)
+		return ret;
+	napi_enable(&pdata->rx_ring->napi);
+
+	if (pdata->phy_dev)
+		phy_start(pdata->phy_dev);
+
+	netif_start_queue(ndev);
+
+	return ret;
+}
+
+static int xgene_enet_close(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+
+	netif_stop_queue(ndev);
+
+	if (pdata->phy_dev)
+		phy_stop(pdata->phy_dev);
+
+	napi_disable(&pdata->rx_ring->napi);
+	xgene_enet_free_irq(ndev);
+	xgene_enet_process_ring(pdata->rx_ring, -1);
+
+	xgene_gmac_tx_disable(pdata);
+	xgene_gmac_rx_disable(pdata);
+
+	return 0;
+}
+
+static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring)
+{
+	struct xgene_enet_pdata *pdata;
+	struct device *dev;
+
+	pdata = netdev_priv(ring->ndev);
+	dev = ndev_to_dev(ring->ndev);
+
+	xgene_enet_clear_ring(ring);
+	dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma);
+}
+
+static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata)
+{
+	struct xgene_enet_desc_ring *buf_pool;
+
+	if (pdata->tx_ring) {
+		xgene_enet_delete_ring(pdata->tx_ring);
+		pdata->tx_ring = NULL;
+	}
+
+	if (pdata->rx_ring) {
+		buf_pool = pdata->rx_ring->buf_pool;
+		xgene_enet_delete_bufpool(buf_pool);
+		xgene_enet_delete_ring(buf_pool);
+		xgene_enet_delete_ring(pdata->rx_ring);
+		pdata->rx_ring = NULL;
+	}
+}
+
+static int xgene_enet_get_ring_size(struct device *dev,
+				    enum xgene_enet_ring_cfgsize cfgsize)
+{
+	int size = -EINVAL;
+
+	switch (cfgsize) {
+	case RING_CFGSIZE_512B:
+		size = 0x200;
+		break;
+	case RING_CFGSIZE_2KB:
+		size = 0x800;
+		break;
+	case RING_CFGSIZE_16KB:
+		size = 0x4000;
+		break;
+	case RING_CFGSIZE_64KB:
+		size = 0x10000;
+		break;
+	case RING_CFGSIZE_512KB:
+		size = 0x80000;
+		break;
+	default:
+		dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize);
+		break;
+	}
+
+	return size;
+}
+
+static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring)
+{
+	struct device *dev;
+
+	if (!ring)
+		return;
+
+	dev = ndev_to_dev(ring->ndev);
+
+	if (ring->desc_addr) {
+		xgene_enet_clear_ring(ring);
+		dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma);
+	}
+	devm_kfree(dev, ring);
+}
+
+static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata)
+{
+	struct device *dev = &pdata->pdev->dev;
+	struct xgene_enet_desc_ring *ring;
+
+	ring = pdata->tx_ring;
+	if (ring && ring->cp_ring && ring->cp_ring->cp_skb)
+		devm_kfree(dev, ring->cp_ring->cp_skb);
+	xgene_enet_free_desc_ring(ring);
+
+	ring = pdata->rx_ring;
+	if (ring && ring->buf_pool && ring->buf_pool->rx_skb)
+		devm_kfree(dev, ring->buf_pool->rx_skb);
+	xgene_enet_free_desc_ring(ring->buf_pool);
+	xgene_enet_free_desc_ring(ring);
+}
+
+static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring(
+			struct net_device *ndev, u32 ring_num,
+			enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id)
+{
+	struct xgene_enet_desc_ring *ring;
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct device *dev = ndev_to_dev(ndev);
+	int size;
+
+	size = xgene_enet_get_ring_size(dev, cfgsize);
+	if (size < 0)
+		return NULL;
+
+	ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring),
+			    GFP_KERNEL);
+	if (!ring)
+		return NULL;
+
+	ring->ndev = ndev;
+	ring->num = ring_num;
+	ring->cfgsize = cfgsize;
+	ring->id = ring_id;
+
+	ring->desc_addr = dma_zalloc_coherent(dev, size, &ring->dma,
+					      GFP_KERNEL);
+	if (!ring->desc_addr) {
+		devm_kfree(dev, ring);
+		return NULL;
+	}
+	ring->size = size;
+
+	ring->cmd_base = pdata->ring_cmd_addr + (ring->num << 6);
+	ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR;
+	pdata->rm = RM3;
+	ring = xgene_enet_setup_ring(ring);
+	netdev_dbg(ndev, "ring info: num=%d  size=%d  id=%d  slots=%d\n",
+		   ring->num, ring->size, ring->id, ring->slots);
+
+	return ring;
+}
+
+static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum)
+{
+	return (owner << 6) | (bufnum & GENMASK(5, 0));
+}
+
+static int xgene_enet_create_desc_rings(struct net_device *ndev)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct device *dev = ndev_to_dev(ndev);
+	struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring;
+	struct xgene_enet_desc_ring *buf_pool = NULL;
+	u8 cpu_bufnum = 0, eth_bufnum = 0;
+	u8 bp_bufnum = 0x20;
+	u16 ring_id, ring_num = 0;
+	int ret;
+
+	/* allocate rx descriptor ring */
+	ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++);
+	rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
+					      RING_CFGSIZE_16KB, ring_id);
+	if (!rx_ring) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	/* allocate buffer pool for receiving packets */
+	ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, bp_bufnum++);
+	buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++,
+					       RING_CFGSIZE_2KB, ring_id);
+	if (!buf_pool) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	rx_ring->nbufpool = NUM_BUFPOOL;
+	rx_ring->buf_pool = buf_pool;
+	rx_ring->irq = pdata->rx_irq;
+	buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots,
+					sizeof(struct sk_buff *), GFP_KERNEL);
+	if (!buf_pool->rx_skb) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool);
+	rx_ring->buf_pool = buf_pool;
+	pdata->rx_ring = rx_ring;
+
+	/* allocate tx descriptor ring */
+	ring_id = xgene_enet_get_ring_id(RING_OWNER_ETH0, eth_bufnum++);
+	tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++,
+					      RING_CFGSIZE_16KB, ring_id);
+	if (!tx_ring) {
+		ret = -ENOMEM;
+		goto err;
+	}
+	pdata->tx_ring = tx_ring;
+
+	cp_ring = pdata->rx_ring;
+	cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots,
+				       sizeof(struct sk_buff *), GFP_KERNEL);
+	if (!cp_ring->cp_skb) {
+		ret = -ENOMEM;
+		goto err;
+	}
+	pdata->tx_ring->cp_ring = cp_ring;
+	pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring);
+
+	pdata->tx_qcnt_hi = pdata->tx_ring->slots / 2;
+	pdata->cp_qcnt_hi = pdata->rx_ring->slots / 2;
+	pdata->cp_qcnt_low = pdata->cp_qcnt_hi / 2;
+
+	return 0;
+
+err:
+	xgene_enet_free_desc_rings(pdata);
+	return ret;
+}
+
+static struct rtnl_link_stats64 *xgene_enet_get_stats64(
+			struct net_device *ndev,
+			struct rtnl_link_stats64 *storage)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct rtnl_link_stats64 *stats = &pdata->stats;
+
+	stats->rx_errors += stats->rx_length_errors +
+			    stats->rx_crc_errors +
+			    stats->rx_frame_errors +
+			    stats->rx_fifo_errors;
+	memcpy(storage, &pdata->stats, sizeof(struct rtnl_link_stats64));
+
+	return storage;
+}
+
+static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr)
+{
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	int ret;
+
+	ret = eth_mac_addr(ndev, addr);
+	if (ret)
+		return ret;
+	xgene_gmac_set_mac_addr(pdata);
+
+	return ret;
+}
+
+static const struct net_device_ops xgene_ndev_ops = {
+	.ndo_open = xgene_enet_open,
+	.ndo_stop = xgene_enet_close,
+	.ndo_start_xmit = xgene_enet_start_xmit,
+	.ndo_tx_timeout = xgene_enet_timeout,
+	.ndo_get_stats64 = xgene_enet_get_stats64,
+	.ndo_change_mtu = eth_change_mtu,
+	.ndo_set_mac_address = xgene_enet_set_mac_address,
+};
+
+static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
+{
+	struct platform_device *pdev;
+	struct net_device *ndev;
+	struct device *dev;
+	struct resource *res;
+	void __iomem *base_addr;
+	const char *mac;
+	int ret;
+
+	pdev = pdata->pdev;
+	dev = &pdev->dev;
+	ndev = pdata->ndev;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "enet_csr");
+	if (!res) {
+		dev_err(dev, "Resource enet_csr not defined\n");
+		return -ENODEV;
+	}
+	pdata->base_addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(pdata->base_addr)) {
+		dev_err(dev, "Unable to retrieve ENET Port CSR region\n");
+		return PTR_ERR(pdata->base_addr);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_csr");
+	if (!res) {
+		dev_err(dev, "Resource ring_csr not defined\n");
+		return -ENODEV;
+	}
+	pdata->ring_csr_addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(pdata->ring_csr_addr)) {
+		dev_err(dev, "Unable to retrieve ENET Ring CSR region\n");
+		return PTR_ERR(pdata->ring_csr_addr);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_cmd");
+	if (!res) {
+		dev_err(dev, "Resource ring_cmd not defined\n");
+		return -ENODEV;
+	}
+	pdata->ring_cmd_addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(pdata->ring_cmd_addr)) {
+		dev_err(dev, "Unable to retrieve ENET Ring command region\n");
+		return PTR_ERR(pdata->ring_cmd_addr);
+	}
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret <= 0) {
+		dev_err(dev, "Unable to get ENET Rx IRQ\n");
+		ret = ret ? : -ENXIO;
+		return ret;
+	}
+	pdata->rx_irq = ret;
+
+	mac = of_get_mac_address(dev->of_node);
+	if (mac)
+		memcpy(ndev->dev_addr, mac, ndev->addr_len);
+	else
+		eth_hw_addr_random(ndev);
+	memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
+
+	pdata->phy_mode = of_get_phy_mode(pdev->dev.of_node);
+	if (pdata->phy_mode < 0) {
+		dev_err(dev, "Incorrect phy-connection-type in DTS\n");
+		return -EINVAL;
+	}
+
+	pdata->clk = devm_clk_get(&pdev->dev, NULL);
+	ret = IS_ERR(pdata->clk);
+	if (IS_ERR(pdata->clk)) {
+		dev_err(&pdev->dev, "can't get clock\n");
+		ret = PTR_ERR(pdata->clk);
+		return ret;
+	}
+
+	base_addr = pdata->base_addr;
+	pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET;
+	pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET;
+	pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET;
+	pdata->mcx_mac_addr = base_addr + BLOCK_ETH_MAC_OFFSET;
+	pdata->mcx_stats_addr = base_addr + BLOCK_ETH_STATS_OFFSET;
+	pdata->mcx_mac_csr_addr = base_addr + BLOCK_ETH_MAC_CSR_OFFSET;
+	pdata->rx_buff_cnt = NUM_PKT_BUF;
+
+	return ret;
+}
+
+static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
+{
+	struct net_device *ndev = pdata->ndev;
+	struct xgene_enet_desc_ring *buf_pool;
+	u16 dst_ring_num;
+	int ret;
+
+	xgene_gmac_tx_disable(pdata);
+	xgene_gmac_rx_disable(pdata);
+
+	ret = xgene_enet_create_desc_rings(ndev);
+	if (ret) {
+		netdev_err(ndev, "Error in ring configuration\n");
+		return ret;
+	}
+
+	/* setup buffer pool */
+	buf_pool = pdata->rx_ring->buf_pool;
+	xgene_enet_init_bufpool(buf_pool);
+	ret = xgene_enet_refill_bufpool(buf_pool, pdata->rx_buff_cnt);
+	if (ret) {
+		xgene_enet_delete_desc_rings(pdata);
+		return ret;
+	}
+
+	dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring);
+	xgene_enet_cle_bypass(pdata, dst_ring_num, buf_pool->id);
+
+	return ret;
+}
+
+static int xgene_enet_probe(struct platform_device *pdev)
+{
+	struct net_device *ndev;
+	struct xgene_enet_pdata *pdata;
+	struct device *dev = &pdev->dev;
+	struct napi_struct *napi;
+	int ret;
+
+	ndev = alloc_etherdev(sizeof(struct xgene_enet_pdata));
+	if (!ndev)
+		return -ENOMEM;
+
+	pdata = netdev_priv(ndev);
+
+	pdata->pdev = pdev;
+	pdata->ndev = ndev;
+	SET_NETDEV_DEV(ndev, dev);
+	platform_set_drvdata(pdev, pdata);
+	ndev->netdev_ops = &xgene_ndev_ops;
+	xgene_enet_set_ethtool_ops(ndev);
+	ndev->features |= NETIF_F_IP_CSUM |
+			  NETIF_F_GSO |
+			  NETIF_F_GRO;
+
+	ret = xgene_enet_get_resources(pdata);
+	if (ret)
+		goto err;
+
+	xgene_enet_reset(pdata);
+	xgene_gmac_init(pdata, SPEED_1000);
+
+	ret = register_netdev(ndev);
+	if (ret) {
+		netdev_err(ndev, "Failed to register netdev\n");
+		goto err;
+	}
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	if (ret) {
+		netdev_err(ndev, "No usable DMA configuration\n");
+		goto err;
+	}
+
+	ret = xgene_enet_init_hw(pdata);
+	if (ret)
+		goto err;
+
+	napi = &pdata->rx_ring->napi;
+	netif_napi_add(ndev, napi, xgene_enet_napi, NAPI_POLL_WEIGHT);
+	ret = xgene_enet_mdio_config(pdata);
+
+	return ret;
+err:
+	free_netdev(ndev);
+	return ret;
+}
+
+static int xgene_enet_remove(struct platform_device *pdev)
+{
+	struct xgene_enet_pdata *pdata;
+	struct net_device *ndev;
+
+	pdata = platform_get_drvdata(pdev);
+	ndev = pdata->ndev;
+
+	xgene_gmac_rx_disable(pdata);
+	xgene_gmac_tx_disable(pdata);
+
+	netif_napi_del(&pdata->rx_ring->napi);
+	xgene_enet_mdio_remove(pdata);
+	xgene_enet_delete_desc_rings(pdata);
+	unregister_netdev(ndev);
+	xgene_gport_shutdown(pdata);
+	free_netdev(ndev);
+
+	return 0;
+}
+
+static struct of_device_id xgene_enet_match[] = {
+	{.compatible = "apm,xgene-enet",},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, xgene_enet_match);
+
+static struct platform_driver xgene_enet_driver = {
+	.driver = {
+		   .name = "xgene-enet",
+		   .of_match_table = xgene_enet_match,
+	},
+	.probe = xgene_enet_probe,
+	.remove = xgene_enet_remove,
+};
+
+module_platform_driver(xgene_enet_driver);
+
+MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver");
+MODULE_VERSION(XGENE_DRV_VERSION);
+MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
new file mode 100644
index 0000000..0815866
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -0,0 +1,135 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Ravi Patel <rapatel@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_MAIN_H__
+#define __XGENE_ENET_MAIN_H__
+
+#include <linux/clk.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/module.h>
+#include <net/ip.h>
+#include <linux/prefetch.h>
+#include <linux/if_vlan.h>
+#include <linux/phy.h>
+#include "xgene_enet_hw.h"
+
+#define XGENE_DRV_VERSION	"v1.0"
+#define XGENE_ENET_MAX_MTU	1536
+#define SKB_BUFFER_SIZE		(XGENE_ENET_MAX_MTU - NET_IP_ALIGN)
+#define NUM_PKT_BUF	64
+#define NUM_BUFPOOL	32
+
+/* software context of a descriptor ring */
+struct xgene_enet_desc_ring {
+	struct net_device *ndev;
+	u16 id;
+	u16 num;
+	u16 head;
+	u16 tail;
+	u16 slots;
+	u16 irq;
+	u32 size;
+	u32 state[NUM_RING_CONFIG];
+	void __iomem *cmd_base;
+	void __iomem *cmd;
+	dma_addr_t dma;
+	u16 dst_ring_num;
+	u8 nbufpool;
+	struct sk_buff *(*rx_skb);
+	struct sk_buff *(*cp_skb);
+	enum xgene_enet_ring_cfgsize cfgsize;
+	struct xgene_enet_desc_ring *cp_ring;
+	struct xgene_enet_desc_ring *buf_pool;
+	struct napi_struct napi;
+	union {
+		void *desc_addr;
+		struct xgene_enet_raw_desc *raw_desc;
+		struct xgene_enet_raw_desc16 *raw_desc16;
+	};
+};
+
+/* ethernet private data */
+struct xgene_enet_pdata {
+	struct net_device *ndev;
+	struct mii_bus *mdio_bus;
+	struct phy_device *phy_dev;
+	int phy_speed;
+	struct clk *clk;
+	struct platform_device *pdev;
+	struct xgene_enet_desc_ring *tx_ring;
+	struct xgene_enet_desc_ring *rx_ring;
+	char *dev_name;
+	u32 rx_buff_cnt;
+	u32 tx_qcnt_hi;
+	u32 cp_qcnt_hi;
+	u32 cp_qcnt_low;
+	u32 rx_irq;
+	void __iomem *eth_csr_addr;
+	void __iomem *eth_ring_if_addr;
+	void __iomem *eth_diag_csr_addr;
+	void __iomem *mcx_mac_addr;
+	void __iomem *mcx_stats_addr;
+	void __iomem *mcx_mac_csr_addr;
+	void __iomem *base_addr;
+	void __iomem *ring_csr_addr;
+	void __iomem *ring_cmd_addr;
+	u32 phy_addr;
+	int phy_mode;
+	u32 speed;
+	u16 rm;
+	struct rtnl_link_stats64 stats;
+};
+
+/* Set the specified value into a bit-field defined by its starting position
+ * and length within a single u64.
+ */
+static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
+{
+	return (val & ((1ULL << len) - 1)) << pos;
+}
+
+#define SET_VAL(field, val) \
+		xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
+
+#define SET_BIT(field) \
+		xgene_enet_set_field_value(field ## _POS, 1, 1)
+
+/* Get the value from a bit-field defined by its starting position
+ * and length within the specified u64.
+ */
+static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
+{
+	return (src >> pos) & ((1ULL << len) - 1);
+}
+
+#define GET_VAL(field, src) \
+		xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
+
+static inline struct device *ndev_to_dev(struct net_device *ndev)
+{
+	return ndev->dev.parent;
+}
+
+void xgene_enet_set_ethtool_ops(struct net_device *netdev);
+
+#endif /* __XGENE_ENET_MAIN_H__ */
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index ce455ae..3f9d4de 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -739,7 +739,6 @@
 
 	case GENET_POWER_PASSIVE:
 		/* Power down LED */
-		bcmgenet_mii_reset(priv->dev);
 		if (priv->hw_params->flags & GENET_HAS_EXT) {
 			reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
 			reg |= (EXT_PWR_DOWN_PHY |
@@ -779,7 +778,9 @@
 	}
 
 	bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
-	bcmgenet_mii_reset(priv->dev);
+
+	if (mode == GENET_POWER_PASSIVE)
+		bcmgenet_mii_reset(priv->dev);
 }
 
 /* ioctl handle special commands that are not present in ethtool. */
@@ -1961,7 +1962,8 @@
 static int bcmgenet_wol_resume(struct bcmgenet_priv *priv)
 {
 	/* From WOL-enabled suspend, switch to regular clock */
-	clk_disable_unprepare(priv->clk_wol);
+	if (priv->wolopts)
+		clk_disable_unprepare(priv->clk_wol);
 
 	phy_init_hw(priv->phydev);
 	/* Speed settings must be restored */
@@ -2164,6 +2166,10 @@
 	 * disabled no new work will be scheduled.
 	 */
 	cancel_work_sync(&priv->bcmgenet_irq_work);
+
+	priv->old_pause = -1;
+	priv->old_link = -1;
+	priv->old_duplex = -1;
 }
 
 static int bcmgenet_close(struct net_device *dev)
@@ -2533,6 +2539,13 @@
 	priv->pdev = pdev;
 	priv->version = (enum bcmgenet_version)of_id->data;
 
+	priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
+	if (IS_ERR(priv->clk))
+		dev_warn(&priv->pdev->dev, "failed to get enet clock\n");
+
+	if (!IS_ERR(priv->clk))
+		clk_prepare_enable(priv->clk);
+
 	bcmgenet_set_hw_params(priv);
 
 	/* Mii wait queue */
@@ -2541,17 +2554,10 @@
 	priv->rx_buf_len = RX_BUF_LENGTH;
 	INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
 
-	priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
-	if (IS_ERR(priv->clk))
-		dev_warn(&priv->pdev->dev, "failed to get enet clock\n");
-
 	priv->clk_wol = devm_clk_get(&priv->pdev->dev, "enet-wol");
 	if (IS_ERR(priv->clk_wol))
 		dev_warn(&priv->pdev->dev, "failed to get enet-wol clock\n");
 
-	if (!IS_ERR(priv->clk))
-		clk_prepare_enable(priv->clk);
-
 	err = reset_umac(priv);
 	if (err)
 		goto err_clk_disable;
@@ -2611,6 +2617,8 @@
 
 	bcmgenet_netif_stop(dev);
 
+	phy_suspend(priv->phydev);
+
 	netif_device_detach(dev);
 
 	/* Disable MAC receive */
@@ -2661,9 +2669,7 @@
 	if (ret)
 		goto out_clk_disable;
 
-	if (priv->wolopts)
-		ret = bcmgenet_wol_resume(priv);
-
+	ret = bcmgenet_wol_resume(priv);
 	if (ret)
 		goto out_clk_disable;
 
@@ -2678,6 +2684,9 @@
 		bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
 	}
 
+	if (priv->wolopts)
+		bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
+
 	/* Disable RX/TX DMA and flush TX queues */
 	dma_ctrl = bcmgenet_dma_disable(priv);
 
@@ -2693,6 +2702,8 @@
 
 	netif_device_attach(dev);
 
+	phy_resume(priv->phydev);
+
 	bcmgenet_netif_start(dev);
 
 	return 0;
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 1896161..c88f7ae 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -129,7 +129,10 @@
 			cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
 	}
 
-	if (status_changed) {
+	if (!status_changed)
+		return;
+
+	if (phydev->link) {
 		reg = bcmgenet_umac_readl(priv, UMAC_CMD);
 		reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
 			       CMD_HD_EN |
@@ -137,8 +140,9 @@
 		reg |= cmd_bits;
 		bcmgenet_umac_writel(priv, reg, UMAC_CMD);
 
-		phy_print_status(phydev);
 	}
+
+	phy_print_status(phydev);
 }
 
 void bcmgenet_mii_reset(struct net_device *dev)
@@ -303,12 +307,12 @@
 	/* In the case of a fixed PHY, the DT node associated
 	 * to the PHY is the Ethernet MAC DT node.
 	 */
-	if (of_phy_is_fixed_link(dn)) {
+	if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
 		ret = of_phy_register_fixed_link(dn);
 		if (ret)
 			return ret;
 
-		priv->phy_dn = dn;
+		priv->phy_dn = of_node_get(dn);
 	}
 
 	phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup, 0,
@@ -444,6 +448,7 @@
 	return 0;
 
 out:
+	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 out_free:
 	kfree(priv->mii_bus->irq);
@@ -455,6 +460,7 @@
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
 
+	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 	kfree(priv->mii_bus->irq);
 	mdiobus_free(priv->mii_bus);
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ba3cead..3ac5d23 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -14093,8 +14093,9 @@
 
 	spin_lock_bh(&tp->lock);
 	if (!tp->hw_stats) {
+		*stats = tp->net_stats_prev;
 		spin_unlock_bh(&tp->lock);
-		return &tp->net_stats_prev;
+		return stats;
 	}
 
 	tg3_get_nstats(tp, stats);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index c9b922c..d572821 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -50,13 +50,13 @@
 #include "cxgb4_uld.h"
 
 #define T4FW_VERSION_MAJOR 0x01
-#define T4FW_VERSION_MINOR 0x09
-#define T4FW_VERSION_MICRO 0x17
+#define T4FW_VERSION_MINOR 0x0B
+#define T4FW_VERSION_MICRO 0x1B
 #define T4FW_VERSION_BUILD 0x00
 
 #define T5FW_VERSION_MAJOR 0x01
-#define T5FW_VERSION_MINOR 0x09
-#define T5FW_VERSION_MICRO 0x17
+#define T5FW_VERSION_MINOR 0x0B
+#define T5FW_VERSION_MICRO 0x1B
 #define T5FW_VERSION_BUILD 0x00
 
 #define CH_WARN(adap, fmt, ...) dev_warn(adap->pdev_dev, fmt, ## __VA_ARGS__)
@@ -522,6 +522,9 @@
 struct sge_eth_txq {                /* state for an SGE Ethernet Tx queue */
 	struct sge_txq q;
 	struct netdev_queue *txq;   /* associated netdev TX queue */
+#ifdef CONFIG_CHELSIO_T4_DCB
+	u8 dcb_prio;		    /* DCB Priority bound to queue */
+#endif
 	unsigned long tso;          /* # of TSO requests */
 	unsigned long tx_cso;       /* # of Tx checksum offloads */
 	unsigned long vlan_ins;     /* # of Tx VLAN insertions */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
index 0d3a9df..8edf0f5 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
@@ -20,6 +20,17 @@
 
 #include "cxgb4.h"
 
+/* DCBx version control
+ */
+char *dcb_ver_array[] = {
+	"Unknown",
+	"DCBx-CIN",
+	"DCBx-CEE 1.01",
+	"DCBx-IEEE",
+	"", "", "",
+	"Auto Negotiated"
+};
+
 /* Initialize a port's Data Center Bridging state.  Typically used after a
  * Link Down event.
  */
@@ -27,25 +38,45 @@
 {
 	struct port_info *pi = netdev2pinfo(dev);
 	struct port_dcb_info *dcb = &pi->dcb;
+	int version_temp = dcb->dcb_version;
 
 	memset(dcb, 0, sizeof(struct port_dcb_info));
 	dcb->state = CXGB4_DCB_STATE_START;
+	if (version_temp)
+		dcb->dcb_version = version_temp;
+
+	netdev_dbg(dev, "%s: Initializing DCB state for port[%d]\n",
+		    __func__, pi->port_id);
+}
+
+void cxgb4_dcb_version_init(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+
+	/* Any writes here are only done on kernels that exlicitly need
+	 * a specific version, say < 2.6.38 which only support CEE
+	 */
+	dcb->dcb_version = FW_PORT_DCB_VER_AUTO;
 }
 
 /* Finite State machine for Data Center Bridging.
  */
 void cxgb4_dcb_state_fsm(struct net_device *dev,
-			 enum cxgb4_dcb_state_input input)
+			 enum cxgb4_dcb_state_input transition_to)
 {
 	struct port_info *pi = netdev2pinfo(dev);
 	struct port_dcb_info *dcb = &pi->dcb;
 	struct adapter *adap = pi->adapter;
+	enum cxgb4_dcb_state current_state = dcb->state;
 
-	switch (input) {
-	case CXGB4_DCB_INPUT_FW_DISABLED: {
-		/* Firmware tells us it's not doing DCB */
-		switch (dcb->state) {
-		case CXGB4_DCB_STATE_START: {
+	netdev_dbg(dev, "%s: State change from %d to %d for %s\n",
+		    __func__, dcb->state, transition_to, dev->name);
+
+	switch (current_state) {
+	case CXGB4_DCB_STATE_START: {
+		switch (transition_to) {
+		case CXGB4_DCB_INPUT_FW_DISABLED: {
 			/* we're going to use Host DCB */
 			dcb->state = CXGB4_DCB_STATE_HOST;
 			dcb->supported = CXGB4_DCBX_HOST_SUPPORT;
@@ -53,48 +84,62 @@
 			break;
 		}
 
-		case CXGB4_DCB_STATE_HOST: {
-			/* we're alreaady in Host DCB mode */
-			break;
-		}
-
-		default:
-			goto bad_state_transition;
-		}
-		break;
-	}
-
-	case CXGB4_DCB_INPUT_FW_ENABLED: {
-		/* Firmware tells us that it is doing DCB */
-		switch (dcb->state) {
-		case CXGB4_DCB_STATE_START: {
+		case CXGB4_DCB_INPUT_FW_ENABLED: {
 			/* we're going to use Firmware DCB */
 			dcb->state = CXGB4_DCB_STATE_FW_INCOMPLETE;
 			dcb->supported = CXGB4_DCBX_FW_SUPPORT;
 			break;
 		}
 
-		case CXGB4_DCB_STATE_FW_INCOMPLETE:
-		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
-			/* we're alreaady in firmware DCB mode */
+		case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
+			/* expected transition */
+			break;
+		}
+
+		case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
+			dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
 			break;
 		}
 
 		default:
-			goto bad_state_transition;
+			goto bad_state_input;
 		}
 		break;
 	}
 
-	case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
-		/* Firmware tells us that its DCB state is incomplete */
-		switch (dcb->state) {
-		case CXGB4_DCB_STATE_FW_INCOMPLETE: {
+	case CXGB4_DCB_STATE_FW_INCOMPLETE: {
+		switch (transition_to) {
+		case CXGB4_DCB_INPUT_FW_ENABLED: {
+			/* we're alreaady in firmware DCB mode */
+			break;
+		}
+
+		case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
 			/* we're already incomplete */
 			break;
 		}
 
-		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
+		case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
+			dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
+			dcb->enabled = 1;
+			linkwatch_fire_event(dev);
+			break;
+		}
+
+		default:
+			goto bad_state_input;
+		}
+		break;
+	}
+
+	case CXGB4_DCB_STATE_FW_ALLSYNCED: {
+		switch (transition_to) {
+		case CXGB4_DCB_INPUT_FW_ENABLED: {
+			/* we're alreaady in firmware DCB mode */
+			break;
+		}
+
+		case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
 			/* We were successfully running with firmware DCB but
 			 * now it's telling us that it's in an "incomplete
 			 * state.  We need to reset back to a ground state
@@ -107,46 +152,48 @@
 			break;
 		}
 
-		default:
-			goto bad_state_transition;
-		}
-		break;
-	}
-
-	case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
-		/* Firmware tells us that its DCB state is complete */
-		switch (dcb->state) {
-		case CXGB4_DCB_STATE_FW_INCOMPLETE: {
-			dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
+		case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
+			/* we're already all sync'ed
+			 * this is only applicable for IEEE or
+			 * when another VI already completed negotiaton
+			 */
 			dcb->enabled = 1;
 			linkwatch_fire_event(dev);
 			break;
 		}
 
-		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
-			/* we're already all sync'ed */
+		default:
+			goto bad_state_input;
+		}
+		break;
+	}
+
+	case CXGB4_DCB_STATE_HOST: {
+		switch (transition_to) {
+		case CXGB4_DCB_INPUT_FW_DISABLED: {
+			/* we're alreaady in Host DCB mode */
 			break;
 		}
 
 		default:
-			goto bad_state_transition;
+			goto bad_state_input;
 		}
 		break;
 	}
 
 	default:
-		goto  bad_state_input;
+		goto bad_state_transition;
 	}
 	return;
 
 bad_state_input:
 	dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: illegal input symbol %d\n",
-		input);
+		transition_to);
 	return;
 
 bad_state_transition:
 	dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: bad state transition, state = %d, input = %d\n",
-		dcb->state, input);
+		current_state, transition_to);
 }
 
 /* Handle a DCB/DCBX update message from the firmware.
@@ -160,6 +207,7 @@
 	struct port_info *pi = netdev_priv(dev);
 	struct port_dcb_info *dcb = &pi->dcb;
 	int dcb_type = pcmd->u.dcb.pgid.type;
+	int dcb_running_version;
 
 	/* Handle Firmware DCB Control messages separately since they drive
 	 * our state machine.
@@ -171,6 +219,25 @@
 			 ? CXGB4_DCB_STATE_FW_ALLSYNCED
 			 : CXGB4_DCB_STATE_FW_INCOMPLETE);
 
+		if (dcb->dcb_version != FW_PORT_DCB_VER_UNKNOWN) {
+			dcb_running_version = FW_PORT_CMD_DCB_VERSION_GET(
+				be16_to_cpu(
+				pcmd->u.dcb.control.dcb_version_to_app_state));
+			if (dcb_running_version == FW_PORT_DCB_VER_CEE1D01 ||
+			    dcb_running_version == FW_PORT_DCB_VER_IEEE) {
+				dcb->dcb_version = dcb_running_version;
+				dev_warn(adap->pdev_dev, "Interface %s is running %s\n",
+					 dev->name,
+					 dcb_ver_array[dcb->dcb_version]);
+			} else {
+				dev_warn(adap->pdev_dev,
+					 "Something screwed up, requested firmware for %s, but firmware returned %s instead\n",
+					 dcb_ver_array[dcb->dcb_version],
+					 dcb_ver_array[dcb_running_version]);
+				dcb->dcb_version = FW_PORT_DCB_VER_UNKNOWN;
+			}
+		}
+
 		cxgb4_dcb_state_fsm(dev, input);
 		return;
 	}
@@ -199,7 +266,11 @@
 		dcb->pg_num_tcs_supported = fwdcb->pgrate.num_tcs_supported;
 		memcpy(dcb->pgrate, &fwdcb->pgrate.pgrate,
 		       sizeof(dcb->pgrate));
+		memcpy(dcb->tsa, &fwdcb->pgrate.tsa,
+		       sizeof(dcb->tsa));
 		dcb->msgs |= CXGB4_DCB_FW_PGRATE;
+		if (dcb->msgs & CXGB4_DCB_FW_PGID)
+			IEEE_FAUX_SYNC(dev, dcb);
 		break;
 
 	case FW_PORT_DCB_TYPE_PRIORATE:
@@ -212,6 +283,7 @@
 		dcb->pfcen = fwdcb->pfc.pfcen;
 		dcb->pfc_num_tcs_supported = fwdcb->pfc.max_pfc_tcs;
 		dcb->msgs |= CXGB4_DCB_FW_PFC;
+		IEEE_FAUX_SYNC(dev, dcb);
 		break;
 
 	case FW_PORT_DCB_TYPE_APP_ID: {
@@ -220,13 +292,25 @@
 		struct app_priority *ap = &dcb->app_priority[idx];
 
 		struct dcb_app app = {
-			.selector = fwap->sel_field,
 			.protocol = be16_to_cpu(fwap->protocolid),
-			.priority = fwap->user_prio_map,
 		};
 		int err;
 
-		err = dcb_setapp(dev, &app);
+		/* Convert from firmware format to relevant format
+		 * when using app selector
+		 */
+		if (dcb->dcb_version == FW_PORT_DCB_VER_IEEE) {
+			app.selector = (fwap->sel_field + 1);
+			app.priority = ffs(fwap->user_prio_map) - 1;
+			err = dcb_ieee_setapp(dev, &app);
+			IEEE_FAUX_SYNC(dev, dcb);
+		} else {
+			/* Default is CEE */
+			app.selector = !!(fwap->sel_field);
+			app.priority = fwap->user_prio_map;
+			err = dcb_setapp(dev, &app);
+		}
+
 		if (err)
 			dev_err(adap->pdev_dev,
 				"Failed DCB Set Application Priority: sel=%d, prot=%d, prio=%d, err=%d\n",
@@ -408,9 +492,10 @@
 	if (err != FW_PORT_DCB_CFG_SUCCESS) {
 		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
 			-err);
-	} else {
-		*bw_per = pcmd.u.dcb.pgrate.pgrate[pgid];
+		return;
 	}
+
+	*bw_per = pcmd.u.dcb.pgrate.pgrate[pgid];
 }
 
 static void cxgb4_getpgbwgcfg_tx(struct net_device *dev, int pgid, u8 *bw_per)
@@ -637,7 +722,8 @@
 			return err;
 		}
 		if (be16_to_cpu(pcmd.u.dcb.app_priority.protocolid) == app_id)
-			return pcmd.u.dcb.app_priority.user_prio_map;
+			if (pcmd.u.dcb.app_priority.sel_field == app_idtype)
+				return pcmd.u.dcb.app_priority.user_prio_map;
 
 		/* exhausted app list */
 		if (!pcmd.u.dcb.app_priority.protocolid)
@@ -657,8 +743,8 @@
 
 /* Write a new Application User Priority Map for the specified Application ID
  */
-static int cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
-			u8 app_prio)
+static int __cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
+			  u8 app_prio)
 {
 	struct fw_port_cmd pcmd;
 	struct port_info *pi = netdev2pinfo(dev);
@@ -673,10 +759,6 @@
 	if (!netif_carrier_ok(dev))
 		return -ENOLINK;
 
-	if (app_idtype != DCB_APP_IDTYPE_ETHTYPE &&
-	    app_idtype != DCB_APP_IDTYPE_PORTNUM)
-		return -EINVAL;
-
 	for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
 		INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
 		pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
@@ -725,6 +807,30 @@
 	return 0;
 }
 
+/* Priority for CEE inside dcb_app is bitmask, with 0 being an invalid value */
+static int cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
+			u8 app_prio)
+{
+	int ret;
+	struct dcb_app app = {
+		.selector = app_idtype,
+		.protocol = app_id,
+		.priority = app_prio,
+	};
+
+	if (app_idtype != DCB_APP_IDTYPE_ETHTYPE &&
+	    app_idtype != DCB_APP_IDTYPE_PORTNUM)
+		return -EINVAL;
+
+	/* Convert app_idtype to a format that firmware understands */
+	ret = __cxgb4_setapp(dev, app_idtype == DCB_APP_IDTYPE_ETHTYPE ?
+			      app_idtype : 3, app_id, app_prio);
+	if (ret)
+		return ret;
+
+	return dcb_setapp(dev, &app);
+}
+
 /* Return whether IEEE Data Center Bridging has been negotiated.
  */
 static inline int cxgb4_ieee_negotiation_complete(struct net_device *dev)
@@ -738,6 +844,7 @@
 
 /* Fill in the Application User Priority Map associated with the
  * specified Application.
+ * Priority for IEEE dcb_app is an integer, with 0 being a valid value
  */
 static int cxgb4_ieee_getapp(struct net_device *dev, struct dcb_app *app)
 {
@@ -748,28 +855,39 @@
 	if (!(app->selector && app->protocol))
 		return -EINVAL;
 
-	prio = dcb_getapp(dev, app);
-	if (prio == 0) {
-		/* If app doesn't exist in dcb_app table, try firmware
-		 * directly.
-		 */
-		prio = __cxgb4_getapp(dev, app->selector, app->protocol, 0);
-	}
+	/* Try querying firmware first, use firmware format */
+	prio = __cxgb4_getapp(dev, app->selector - 1, app->protocol, 0);
 
-	app->priority = prio;
+	if (prio < 0)
+		prio = dcb_ieee_getapp_mask(dev, app);
+
+	app->priority = ffs(prio) - 1;
 	return 0;
 }
 
-/* Write a new Application User Priority Map for the specified App id. */
+/* Write a new Application User Priority Map for the specified Application ID.
+ * Priority for IEEE dcb_app is an integer, with 0 being a valid value
+ */
 static int cxgb4_ieee_setapp(struct net_device *dev, struct dcb_app *app)
 {
+	int ret;
+
 	if (!cxgb4_ieee_negotiation_complete(dev))
 		return -EINVAL;
-	if (!(app->selector && app->protocol && app->priority))
+	if (!(app->selector && app->protocol))
 		return -EINVAL;
 
-	cxgb4_setapp(dev, app->selector, app->protocol, app->priority);
-	return dcb_setapp(dev, app);
+	if (!(app->selector > IEEE_8021QAZ_APP_SEL_ETHERTYPE  &&
+	      app->selector < IEEE_8021QAZ_APP_SEL_ANY))
+		return -EINVAL;
+
+	/* change selector to a format that firmware understands */
+	ret = __cxgb4_setapp(dev, app->selector - 1, app->protocol,
+			     (1 << app->priority));
+	if (ret)
+		return ret;
+
+	return dcb_ieee_setapp(dev, app);
 }
 
 /* Return our DCBX parameters.
@@ -794,8 +912,9 @@
 	    != dcb_request)
 		return 1;
 
-	/* Can't set DCBX capabilities if DCBX isn't enabled. */
-	if (!pi->dcb.state)
+	/* Can't enable DCB if we haven't successfully negotiated it.
+	 */
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
 		return 1;
 
 	/* There's currently no mechanism to allow for the firmware DCBX
@@ -874,7 +993,8 @@
 		table[i].selector = pcmd.u.dcb.app_priority.sel_field;
 		table[i].protocol =
 			be16_to_cpu(pcmd.u.dcb.app_priority.protocolid);
-		table[i].priority = pcmd.u.dcb.app_priority.user_prio_map;
+		table[i].priority =
+			ffs(pcmd.u.dcb.app_priority.user_prio_map) - 1;
 	}
 	return err;
 }
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.h
index 1ec1d83..2a6aa889 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.h
@@ -63,6 +63,13 @@
 #define INIT_PORT_DCB_WRITE_CMD(__pcmd, __port) \
 	INIT_PORT_DCB_CMD(__pcmd, __port, EXEC, FW_PORT_ACTION_L2_DCB_CFG)
 
+#define IEEE_FAUX_SYNC(__dev, __dcb) \
+	do { \
+		if ((__dcb)->dcb_version == FW_PORT_DCB_VER_IEEE) \
+			cxgb4_dcb_state_fsm((__dev), \
+					    CXGB4_DCB_STATE_FW_ALLSYNCED); \
+	} while (0)
+
 /* States we can be in for a port's Data Center Bridging.
  */
 enum cxgb4_dcb_state {
@@ -108,11 +115,13 @@
 	 * Native Endian format).
 	 */
 	u32	pgid;			/* Priority Group[0..7] */
+	u8	dcb_version;		/* Running DCBx version */
 	u8	pfcen;			/* Priority Flow Control[0..7] */
 	u8	pg_num_tcs_supported;	/* max PG Traffic Classes */
 	u8	pfc_num_tcs_supported;	/* max PFC Traffic Classes */
 	u8	pgrate[8];		/* Priority Group Rate[0..7] */
 	u8	priorate[8];		/* Priority Rate[0..7] */
+	u8	tsa[8];			/* TSA Algorithm[0..7] */
 	struct app_priority { /* Application Information */
 		u8	user_prio_map;	/* Priority Map bitfield */
 		u8	sel_field;	/* Protocol ID interpretation */
@@ -121,6 +130,7 @@
 };
 
 void cxgb4_dcb_state_init(struct net_device *);
+void cxgb4_dcb_version_init(struct net_device *);
 void cxgb4_dcb_state_fsm(struct net_device *, enum cxgb4_dcb_state_input);
 void cxgb4_dcb_handle_fw_update(struct adapter *, const struct fw_port_cmd *);
 void cxgb4_dcb_set_caps(struct adapter *, const struct fw_port_cmd *);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 8903e68..1afee70 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -522,6 +522,8 @@
 			dev_err(adap->pdev_dev,
 				"Can't %s DCB Priority on port %d, TX Queue %d: err=%d\n",
 				enable ? "set" : "unset", pi->port_id, i, -err);
+		else
+			txq->dcb_prio = value;
 	}
 }
 #endif /* CONFIG_CHELSIO_T4_DCB */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index ff709e3..0549170 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -1629,6 +1629,14 @@
 	FW_PORT_L2_CTLBF_TXIPG	= 0x20
 };
 
+enum fw_port_dcb_versions {
+	FW_PORT_DCB_VER_UNKNOWN,
+	FW_PORT_DCB_VER_CEE1D0,
+	FW_PORT_DCB_VER_CEE1D01,
+	FW_PORT_DCB_VER_IEEE,
+	FW_PORT_DCB_VER_AUTO = 7
+};
+
 enum fw_port_dcb_cfg {
 	FW_PORT_DCB_CFG_PG	= 0x01,
 	FW_PORT_DCB_CFG_PFC	= 0x02,
@@ -1709,6 +1717,7 @@
 				__u8   r10_lo[5];
 				__u8   num_tcs_supported;
 				__u8   pgrate[8];
+				__u8   tsa[8];
 			} pgrate;
 			struct fw_port_dcb_priorate {
 				__u8   type;
@@ -1735,7 +1744,7 @@
 			struct fw_port_dcb_control {
 				__u8   type;
 				__u8   all_syncd_pkd;
-				__be16 pfc_state_to_app_state;
+				__be16 dcb_version_to_app_state;
 				__be32 r11;
 				__be64 r12;
 			} control;
@@ -1778,6 +1787,7 @@
 #define FW_PORT_CMD_DCBXDIS (1U << 7)
 #define FW_PORT_CMD_APPLY (1U <<  7)
 #define FW_PORT_CMD_ALL_SYNCD (1U << 7)
+#define FW_PORT_CMD_DCB_VERSION_GET(x) (((x) >> 8) & 0xf)
 
 #define FW_PORT_CMD_PPPEN(x) ((x) << 31)
 #define FW_PORT_CMD_TPSRC(x) ((x) << 28)
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index 23084fb..9b33057 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -93,7 +93,7 @@
 };
 
 /* Structure/enum declaration ------------------------------- */
-typedef struct board_info {
+struct board_info {
 
 	void __iomem	*io_addr;	/* Register I/O base address */
 	void __iomem	*io_data;	/* Data I/O address */
@@ -141,7 +141,7 @@
 	u32		wake_state;
 
 	int		ip_summed;
-} board_info_t;
+};
 
 /* debug code */
 
@@ -151,7 +151,7 @@
 	}						\
 } while (0)
 
-static inline board_info_t *to_dm9000_board(struct net_device *dev)
+static inline struct board_info *to_dm9000_board(struct net_device *dev)
 {
 	return netdev_priv(dev);
 }
@@ -162,7 +162,7 @@
  *   Read a byte from I/O port
  */
 static u8
-ior(board_info_t *db, int reg)
+ior(struct board_info *db, int reg)
 {
 	writeb(reg, db->io_addr);
 	return readb(db->io_data);
@@ -173,14 +173,14 @@
  */
 
 static void
-iow(board_info_t *db, int reg, int value)
+iow(struct board_info *db, int reg, int value)
 {
 	writeb(reg, db->io_addr);
 	writeb(value, db->io_data);
 }
 
 static void
-dm9000_reset(board_info_t *db)
+dm9000_reset(struct board_info *db)
 {
 	dev_dbg(db->dev, "resetting device\n");
 
@@ -272,7 +272,7 @@
  * Sleep, either by using msleep() or if we are suspending, then
  * use mdelay() to sleep.
  */
-static void dm9000_msleep(board_info_t *db, unsigned int ms)
+static void dm9000_msleep(struct board_info *db, unsigned int ms)
 {
 	if (db->in_suspend || db->in_timeout)
 		mdelay(ms);
@@ -284,7 +284,7 @@
 static int
 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned long flags;
 	unsigned int reg_save;
 	int ret;
@@ -330,7 +330,7 @@
 dm9000_phy_write(struct net_device *dev,
 		 int phyaddr_unused, int reg, int value)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned long flags;
 	unsigned long reg_save;
 
@@ -408,7 +408,7 @@
 	}
 }
 
-static void dm9000_schedule_poll(board_info_t *db)
+static void dm9000_schedule_poll(struct board_info *db)
 {
 	if (db->type == TYPE_DM9000E)
 		schedule_delayed_work(&db->phy_poll, HZ * 2);
@@ -416,7 +416,7 @@
 
 static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	if (!netif_running(dev))
 		return -EINVAL;
@@ -425,7 +425,7 @@
 }
 
 static unsigned int
-dm9000_read_locked(board_info_t *db, int reg)
+dm9000_read_locked(struct board_info *db, int reg)
 {
 	unsigned long flags;
 	unsigned int ret;
@@ -437,7 +437,7 @@
 	return ret;
 }
 
-static int dm9000_wait_eeprom(board_info_t *db)
+static int dm9000_wait_eeprom(struct board_info *db)
 {
 	unsigned int status;
 	int timeout = 8;	/* wait max 8msec */
@@ -474,7 +474,7 @@
  *  Read a word data from EEPROM
  */
 static void
-dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
+dm9000_read_eeprom(struct board_info *db, int offset, u8 *to)
 {
 	unsigned long flags;
 
@@ -514,7 +514,7 @@
  * Write a word data to SROM
  */
 static void
-dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
+dm9000_write_eeprom(struct board_info *db, int offset, u8 *data)
 {
 	unsigned long flags;
 
@@ -546,7 +546,7 @@
 static void dm9000_get_drvinfo(struct net_device *dev,
 			       struct ethtool_drvinfo *info)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	strlcpy(info->driver, CARDNAME, sizeof(info->driver));
 	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
@@ -556,21 +556,21 @@
 
 static u32 dm9000_get_msglevel(struct net_device *dev)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	return dm->msg_enable;
 }
 
 static void dm9000_set_msglevel(struct net_device *dev, u32 value)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	dm->msg_enable = value;
 }
 
 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	mii_ethtool_gset(&dm->mii, cmd);
 	return 0;
@@ -578,21 +578,21 @@
 
 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	return mii_ethtool_sset(&dm->mii, cmd);
 }
 
 static int dm9000_nway_reset(struct net_device *dev)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	return mii_nway_restart(&dm->mii);
 }
 
 static int dm9000_set_features(struct net_device *dev,
 	netdev_features_t features)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	netdev_features_t changed = dev->features ^ features;
 	unsigned long flags;
 
@@ -608,7 +608,7 @@
 
 static u32 dm9000_get_link(struct net_device *dev)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	u32 ret;
 
 	if (dm->flags & DM9000_PLATF_EXT_PHY)
@@ -629,7 +629,7 @@
 static int dm9000_get_eeprom(struct net_device *dev,
 			     struct ethtool_eeprom *ee, u8 *data)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	int offset = ee->offset;
 	int len = ee->len;
 	int i;
@@ -653,7 +653,7 @@
 static int dm9000_set_eeprom(struct net_device *dev,
 			     struct ethtool_eeprom *ee, u8 *data)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	int offset = ee->offset;
 	int len = ee->len;
 	int done;
@@ -691,7 +691,7 @@
 
 static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	memset(w, 0, sizeof(struct ethtool_wolinfo));
 
@@ -702,7 +702,7 @@
 
 static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 	unsigned long flags;
 	u32 opts = w->wolopts;
 	u32 wcr = 0;
@@ -752,7 +752,7 @@
 	.set_eeprom		= dm9000_set_eeprom,
 };
 
-static void dm9000_show_carrier(board_info_t *db,
+static void dm9000_show_carrier(struct board_info *db,
 				unsigned carrier, unsigned nsr)
 {
 	int lpa;
@@ -775,7 +775,7 @@
 dm9000_poll_work(struct work_struct *w)
 {
 	struct delayed_work *dw = to_delayed_work(w);
-	board_info_t *db = container_of(dw, board_info_t, phy_poll);
+	struct board_info *db = container_of(dw, struct board_info, phy_poll);
 	struct net_device *ndev = db->ndev;
 
 	if (db->flags & DM9000_PLATF_SIMPLE_PHY &&
@@ -843,7 +843,7 @@
 static void
 dm9000_hash_table_unlocked(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	struct netdev_hw_addr *ha;
 	int i, oft;
 	u32 hash_val;
@@ -879,7 +879,7 @@
 static void
 dm9000_hash_table(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned long flags;
 
 	spin_lock_irqsave(&db->lock, flags);
@@ -888,13 +888,13 @@
 }
 
 static void
-dm9000_mask_interrupts(board_info_t *db)
+dm9000_mask_interrupts(struct board_info *db)
 {
 	iow(db, DM9000_IMR, IMR_PAR);
 }
 
 static void
-dm9000_unmask_interrupts(board_info_t *db)
+dm9000_unmask_interrupts(struct board_info *db)
 {
 	iow(db, DM9000_IMR, db->imr_all);
 }
@@ -905,7 +905,7 @@
 static void
 dm9000_init_dm9000(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned int imr;
 	unsigned int ncr;
 
@@ -970,7 +970,7 @@
 /* Our watchdog timed out. Called by the networking layer */
 static void dm9000_timeout(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	u8 reg_save;
 	unsigned long flags;
 
@@ -996,7 +996,7 @@
 			       int ip_summed,
 			       u16 pkt_len)
 {
-	board_info_t *dm = to_dm9000_board(dev);
+	struct board_info *dm = to_dm9000_board(dev);
 
 	/* The DM9000 is not smart enough to leave fragmented packets alone. */
 	if (dm->ip_summed != ip_summed) {
@@ -1023,7 +1023,7 @@
 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	unsigned long flags;
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 
 	dm9000_dbg(db, 3, "%s:\n", __func__);
 
@@ -1062,7 +1062,7 @@
  * receive the packet to upper layer, free the transmitted packet
  */
 
-static void dm9000_tx_done(struct net_device *dev, board_info_t *db)
+static void dm9000_tx_done(struct net_device *dev, struct board_info *db)
 {
 	int tx_status = ior(db, DM9000_NSR);	/* Got TX status */
 
@@ -1094,7 +1094,7 @@
 static void
 dm9000_rx(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	struct dm9000_rxhdr rxhdr;
 	struct sk_buff *skb;
 	u8 rxbyte, *rdptr;
@@ -1196,7 +1196,7 @@
 static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = dev_id;
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	int int_status;
 	unsigned long flags;
 	u8 reg_save;
@@ -1246,7 +1246,7 @@
 static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = dev_id;
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned long flags;
 	unsigned nsr, wcr;
 
@@ -1296,7 +1296,7 @@
 static int
 dm9000_open(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 	unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
 
 	if (netif_msg_ifup(db))
@@ -1342,7 +1342,7 @@
 static void
 dm9000_shutdown(struct net_device *dev)
 {
-	board_info_t *db = netdev_priv(dev);
+	struct board_info *db = netdev_priv(dev);
 
 	/* RESET device */
 	dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);	/* PHY RESET */
@@ -1358,7 +1358,7 @@
 static int
 dm9000_stop(struct net_device *ndev)
 {
-	board_info_t *db = netdev_priv(ndev);
+	struct board_info *db = netdev_priv(ndev);
 
 	if (netif_msg_ifdown(db))
 		dev_dbg(db->dev, "shutting down %s\n", ndev->name);
@@ -1681,7 +1681,7 @@
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct net_device *ndev = platform_get_drvdata(pdev);
-	board_info_t *db;
+	struct board_info *db;
 
 	if (ndev) {
 		db = netdev_priv(ndev);
@@ -1704,7 +1704,7 @@
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct net_device *ndev = platform_get_drvdata(pdev);
-	board_info_t *db = netdev_priv(ndev);
+	struct board_info *db = netdev_priv(ndev);
 
 	if (ndev) {
 		if (netif_running(ndev)) {
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 811f135..43e08d0 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -897,5 +897,6 @@
  */
 void be_roce_dev_open(struct be_adapter *);
 void be_roce_dev_close(struct be_adapter *);
+void be_roce_dev_shutdown(struct be_adapter *);
 
 #endif				/* BE_H */
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index b06e540..93ff8ef 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -5014,6 +5014,7 @@
 	if (!adapter)
 		return;
 
+	be_roce_dev_shutdown(adapter);
 	cancel_delayed_work_sync(&adapter->work);
 	cancel_delayed_work_sync(&adapter->func_recovery_work);
 
diff --git a/drivers/net/ethernet/emulex/benet/be_roce.c b/drivers/net/ethernet/emulex/benet/be_roce.c
index 5bf1660..ef4672d 100644
--- a/drivers/net/ethernet/emulex/benet/be_roce.c
+++ b/drivers/net/ethernet/emulex/benet/be_roce.c
@@ -120,7 +120,8 @@
 {
 	if (ocrdma_drv && adapter->ocrdma_dev &&
 	    ocrdma_drv->state_change_handler)
-		ocrdma_drv->state_change_handler(adapter->ocrdma_dev, 0);
+		ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+						 BE_DEV_UP);
 }
 
 void be_roce_dev_open(struct be_adapter *adapter)
@@ -136,7 +137,8 @@
 {
 	if (ocrdma_drv && adapter->ocrdma_dev &&
 	    ocrdma_drv->state_change_handler)
-		ocrdma_drv->state_change_handler(adapter->ocrdma_dev, 1);
+		ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+						 BE_DEV_DOWN);
 }
 
 void be_roce_dev_close(struct be_adapter *adapter)
@@ -148,6 +150,18 @@
 	}
 }
 
+void be_roce_dev_shutdown(struct be_adapter *adapter)
+{
+	if (be_roce_supported(adapter)) {
+		mutex_lock(&be_adapter_list_lock);
+		if (ocrdma_drv && adapter->ocrdma_dev &&
+		    ocrdma_drv->state_change_handler)
+			ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+							 BE_DEV_SHUTDOWN);
+		mutex_unlock(&be_adapter_list_lock);
+	}
+}
+
 int be_roce_register_driver(struct ocrdma_driver *drv)
 {
 	struct be_adapter *dev;
diff --git a/drivers/net/ethernet/emulex/benet/be_roce.h b/drivers/net/ethernet/emulex/benet/be_roce.h
index a3d9e96..e6f7eb1 100644
--- a/drivers/net/ethernet/emulex/benet/be_roce.h
+++ b/drivers/net/ethernet/emulex/benet/be_roce.h
@@ -62,7 +62,8 @@
 
 enum {
 	BE_DEV_UP	= 0,
-	BE_DEV_DOWN	= 1
+	BE_DEV_DOWN	= 1,
+	BE_DEV_SHUTDOWN = 2
 };
 
 /* APIs for RoCE driver to register callback handlers,
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index bd53caf..9f7fa64 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -310,6 +310,7 @@
 	int	mii_timeout;
 	uint	phy_speed;
 	phy_interface_t	phy_interface;
+	struct device_node *phy_node;
 	int	link;
 	int	full_duplex;
 	int	speed;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 66fe1f6..4f87dff 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -52,6 +52,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
+#include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/regulator/consumer.h>
 #include <linux/if_vlan.h>
@@ -1648,29 +1649,37 @@
 
 	fep->phy_dev = NULL;
 
-	/* check for attached phy */
-	for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
-		if ((fep->mii_bus->phy_mask & (1 << phy_id)))
-			continue;
-		if (fep->mii_bus->phy_map[phy_id] == NULL)
-			continue;
-		if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
-			continue;
-		if (dev_id--)
-			continue;
-		strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
-		break;
+	if (fep->phy_node) {
+		phy_dev = of_phy_connect(ndev, fep->phy_node,
+					 &fec_enet_adjust_link, 0,
+					 fep->phy_interface);
+	} else {
+		/* check for attached phy */
+		for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
+			if ((fep->mii_bus->phy_mask & (1 << phy_id)))
+				continue;
+			if (fep->mii_bus->phy_map[phy_id] == NULL)
+				continue;
+			if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
+				continue;
+			if (dev_id--)
+				continue;
+			strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
+			break;
+		}
+
+		if (phy_id >= PHY_MAX_ADDR) {
+			netdev_info(ndev, "no PHY, assuming direct connection to switch\n");
+			strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
+			phy_id = 0;
+		}
+
+		snprintf(phy_name, sizeof(phy_name),
+			 PHY_ID_FMT, mdio_bus_id, phy_id);
+		phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link,
+				      fep->phy_interface);
 	}
 
-	if (phy_id >= PHY_MAX_ADDR) {
-		netdev_info(ndev, "no PHY, assuming direct connection to switch\n");
-		strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
-		phy_id = 0;
-	}
-
-	snprintf(phy_name, sizeof(phy_name), PHY_ID_FMT, mdio_bus_id, phy_id);
-	phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link,
-			      fep->phy_interface);
 	if (IS_ERR(phy_dev)) {
 		netdev_err(ndev, "could not attach to PHY\n");
 		return PTR_ERR(phy_dev);
@@ -1707,6 +1716,7 @@
 	struct fec_enet_private *fep = netdev_priv(ndev);
 	const struct platform_device_id *id_entry =
 				platform_get_device_id(fep->pdev);
+	struct device_node *node;
 	int err = -ENXIO, i;
 
 	/*
@@ -1774,7 +1784,15 @@
 	for (i = 0; i < PHY_MAX_ADDR; i++)
 		fep->mii_bus->irq[i] = PHY_POLL;
 
-	if (mdiobus_register(fep->mii_bus))
+	node = of_get_child_by_name(pdev->dev.of_node, "mdio");
+	if (node) {
+		err = of_mdiobus_register(fep->mii_bus, node);
+		of_node_put(node);
+	} else {
+		err = mdiobus_register(fep->mii_bus);
+	}
+
+	if (err)
 		goto err_out_free_mdio_irq;
 
 	mii_cnt++;
@@ -2527,6 +2545,7 @@
 	struct resource *r;
 	const struct of_device_id *of_id;
 	static int dev_id;
+	struct device_node *np = pdev->dev.of_node, *phy_node;
 
 	of_id = of_match_device(fec_dt_ids, &pdev->dev);
 	if (of_id)
@@ -2566,6 +2585,18 @@
 
 	platform_set_drvdata(pdev, ndev);
 
+	phy_node = of_parse_phandle(np, "phy-handle", 0);
+	if (!phy_node && of_phy_is_fixed_link(np)) {
+		ret = of_phy_register_fixed_link(np);
+		if (ret < 0) {
+			dev_err(&pdev->dev,
+				"broken fixed-link specification\n");
+			goto failed_phy;
+		}
+		phy_node = of_node_get(np);
+	}
+	fep->phy_node = phy_node;
+
 	ret = of_get_phy_mode(pdev->dev.of_node);
 	if (ret < 0) {
 		pdata = dev_get_platdata(&pdev->dev);
@@ -2670,6 +2701,8 @@
 failed_regulator:
 	fec_enet_clk_enable(ndev, false);
 failed_clk:
+failed_phy:
+	of_node_put(phy_node);
 failed_ioremap:
 	free_netdev(ndev);
 
@@ -2691,6 +2724,7 @@
 	if (fep->ptp_clock)
 		ptp_clock_unregister(fep->ptp_clock);
 	fec_enet_clk_enable(ndev, false);
+	of_node_put(fep->phy_node);
 	free_netdev(ndev);
 
 	return 0;
diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx.c b/drivers/net/ethernet/freescale/fec_mpc52xx.c
index 9947765..ff55fbb 100644
--- a/drivers/net/ethernet/freescale/fec_mpc52xx.c
+++ b/drivers/net/ethernet/freescale/fec_mpc52xx.c
@@ -1015,8 +1015,7 @@
 
 	unregister_netdev(ndev);
 
-	if (priv->phy_node)
-		of_node_put(priv->phy_node);
+	of_node_put(priv->phy_node);
 	priv->phy_node = NULL;
 
 	irq_dispose_mapping(ndev->irq);
diff --git a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
index cfaf17b..748fd24 100644
--- a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
+++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c
@@ -1033,7 +1033,7 @@
 		/* In the case of a fixed PHY, the DT node associated
 		 * to the PHY is the Ethernet MAC DT node.
 		 */
-		fpi->phy_node = ofdev->dev.of_node;
+		fpi->phy_node = of_node_get(ofdev->dev.of_node);
 	}
 
 	if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) {
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index a6cf40e..fb29d04 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -892,12 +892,12 @@
 	/* In the case of a fixed PHY, the DT node associated
 	 * to the PHY is the Ethernet MAC DT node.
 	 */
-	if (of_phy_is_fixed_link(np)) {
+	if (!priv->phy_node && of_phy_is_fixed_link(np)) {
 		err = of_phy_register_fixed_link(np);
 		if (err)
 			goto err_grp_init;
 
-		priv->phy_node = np;
+		priv->phy_node = of_node_get(np);
 	}
 
 	/* Find the TBI PHY.  If it's not there, we don't support SGMII */
@@ -1435,10 +1435,8 @@
 	unmap_group_regs(priv);
 	gfar_free_rx_queues(priv);
 	gfar_free_tx_queues(priv);
-	if (priv->phy_node)
-		of_node_put(priv->phy_node);
-	if (priv->tbi_node)
-		of_node_put(priv->tbi_node);
+	of_node_put(priv->phy_node);
+	of_node_put(priv->tbi_node);
 	free_gfar_dev(priv);
 	return err;
 }
@@ -1447,10 +1445,8 @@
 {
 	struct gfar_private *priv = platform_get_drvdata(ofdev);
 
-	if (priv->phy_node)
-		of_node_put(priv->phy_node);
-	if (priv->tbi_node)
-		of_node_put(priv->tbi_node);
+	of_node_put(priv->phy_node);
+	of_node_put(priv->tbi_node);
 
 	unregister_netdev(priv->ndev);
 	unmap_group_regs(priv);
diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index 8ceaf7a..3cf0478 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -3785,16 +3785,15 @@
 	ug_info->uf_info.irq = irq_of_parse_and_map(np, 0);
 
 	ug_info->phy_node = of_parse_phandle(np, "phy-handle", 0);
-	if (!ug_info->phy_node) {
-		/* In the case of a fixed PHY, the DT node associated
+	if (!ug_info->phy_node && of_phy_is_fixed_link(np)) {
+		/*
+		 * In the case of a fixed PHY, the DT node associated
 		 * to the PHY is the Ethernet MAC DT node.
 		 */
-		if (of_phy_is_fixed_link(np)) {
-			err = of_phy_register_fixed_link(np);
-			if (err)
-				return err;
-		}
-		ug_info->phy_node = np;
+		err = of_phy_register_fixed_link(np);
+		if (err)
+			return err;
+		ug_info->phy_node = of_node_get(np);
 	}
 
 	/* Find the TBI PHY node.  If it's not there, we don't support SGMII */
@@ -3862,8 +3861,11 @@
 	/* Create an ethernet device instance */
 	dev = alloc_etherdev(sizeof(*ugeth));
 
-	if (dev == NULL)
+	if (dev == NULL) {
+		of_node_put(ug_info->tbi_node);
+		of_node_put(ug_info->phy_node);
 		return -ENOMEM;
+	}
 
 	ugeth = netdev_priv(dev);
 	spin_lock_init(&ugeth->lock);
@@ -3897,6 +3899,8 @@
 			pr_err("%s: Cannot register net device, aborting\n",
 			       dev->name);
 		free_netdev(dev);
+		of_node_put(ug_info->tbi_node);
+		of_node_put(ug_info->phy_node);
 		return err;
 	}
 
@@ -3920,6 +3924,8 @@
 	unregister_netdev(dev);
 	free_netdev(dev);
 	ucc_geth_memclean(ugeth);
+	of_node_put(ugeth->ug_info->tbi_node);
+	of_node_put(ugeth->ug_info->phy_node);
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c
index cfe7a74..a7139f5 100644
--- a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c
+++ b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c
@@ -99,23 +99,23 @@
 /*
     card type
  */
-typedef enum { MBH10302, MBH10304, TDK, CONTEC, LA501, UNGERMANN, 
+enum cardtype { MBH10302, MBH10304, TDK, CONTEC, LA501, UNGERMANN,
 	       XXX10304, NEC, KME
-} cardtype_t;
+};
 
 /*
     driver specific data structure
 */
-typedef struct local_info_t {
+struct local_info {
 	struct pcmcia_device	*p_dev;
     long open_time;
     uint tx_started:1;
     uint tx_queue;
     u_short tx_queue_len;
-    cardtype_t cardtype;
+    enum cardtype cardtype;
     u_short sent;
     u_char __iomem *base;
-} local_info_t;
+};
 
 #define MC_FILTERBREAK 64
 
@@ -232,13 +232,13 @@
 
 static int fmvj18x_probe(struct pcmcia_device *link)
 {
-    local_info_t *lp;
+    struct local_info *lp;
     struct net_device *dev;
 
     dev_dbg(&link->dev, "fmvj18x_attach()\n");
 
     /* Make up a FMVJ18x specific data structure */
-    dev = alloc_etherdev(sizeof(local_info_t));
+    dev = alloc_etherdev(sizeof(struct local_info));
     if (!dev)
 	return -ENOMEM;
     lp = netdev_priv(dev);
@@ -327,10 +327,10 @@
 static int fmvj18x_config(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     int i, ret;
     unsigned int ioaddr;
-    cardtype_t cardtype;
+    enum cardtype cardtype;
     char *card_name = "unknown";
     u8 *buf;
     size_t len;
@@ -584,7 +584,7 @@
     int i;
     struct net_device *dev = link->priv;
     unsigned int ioaddr;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
 
     /* Allocate a small memory window */
     link->resource[3]->flags = WIN_DATA_WIDTH_8|WIN_MEMORY_TYPE_AM|WIN_ENABLE;
@@ -626,7 +626,7 @@
 {
 
     struct net_device *dev = link->priv;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     u_char __iomem *tmp;
 
     dev_dbg(&link->dev, "fmvj18x_release\n");
@@ -711,7 +711,7 @@
 static irqreturn_t fjn_interrupt(int dummy, void *dev_id)
 {
     struct net_device *dev = dev_id;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr;
     unsigned short tx_stat, rx_stat;
 
@@ -772,7 +772,7 @@
 
 static void fjn_tx_timeout(struct net_device *dev)
 {
-    struct local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
 
     netdev_notice(dev, "transmit timed out with status %04x, %s?\n",
@@ -802,7 +802,7 @@
 static netdev_tx_t fjn_start_xmit(struct sk_buff *skb,
 					struct net_device *dev)
 {
-    struct local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     short length = skb->len;
     
@@ -874,7 +874,7 @@
 
 static void fjn_reset(struct net_device *dev)
 {
-    struct local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     int i;
 
@@ -1058,7 +1058,7 @@
 
 static int fjn_open(struct net_device *dev)
 {
-    struct local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     struct pcmcia_device *link = lp->p_dev;
 
     pr_debug("fjn_open('%s').\n", dev->name);
@@ -1083,7 +1083,7 @@
 
 static int fjn_close(struct net_device *dev)
 {
-    struct local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     struct pcmcia_device *link = lp->p_dev;
     unsigned int ioaddr = dev->base_addr;
 
diff --git a/drivers/net/ethernet/ibm/ehea/Makefile b/drivers/net/ethernet/ibm/ehea/Makefile
index 775d996..cd473e2 100644
--- a/drivers/net/ethernet/ibm/ehea/Makefile
+++ b/drivers/net/ethernet/ibm/ehea/Makefile
@@ -1,6 +1,6 @@
 #
 # Makefile for the eHEA ethernet device driver for IBM eServer System p
 #
-ehea-y = ehea_main.o ehea_phyp.o ehea_qmr.o ehea_ethtool.o ehea_phyp.o
+ehea-y = ehea_main.o ehea_phyp.o ehea_qmr.o ehea_ethtool.o
 obj-$(CONFIG_EHEA) += ehea.o
 
diff --git a/drivers/net/ethernet/intel/e1000e/manage.c b/drivers/net/ethernet/intel/e1000e/manage.c
index 5885603..06edfca 100644
--- a/drivers/net/ethernet/intel/e1000e/manage.c
+++ b/drivers/net/ethernet/intel/e1000e/manage.c
@@ -47,7 +47,7 @@
  *  e1000_mng_enable_host_if - Checks host interface is enabled
  *  @hw: pointer to the HW structure
  *
- *  Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND
+ *  Returns 0 upon success, else -E1000_ERR_HOST_INTERFACE_COMMAND
  *
  *  This function checks whether the HOST IF is enabled for command operation
  *  and also checks whether the previous command is completed.  It busy waits
@@ -78,7 +78,7 @@
 	}
 
 	if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) {
-		e_dbg("Previous command timeout failed .\n");
+		e_dbg("Previous command timeout failed.\n");
 		return -E1000_ERR_HOST_INTERFACE_COMMAND;
 	}
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_fcoe.c b/drivers/net/ethernet/intel/i40e/i40e_fcoe.c
index 6938fc1..5d01db1 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_fcoe.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_fcoe.c
@@ -33,6 +33,7 @@
 #include <scsi/fc/fc_fcoe.h>
 #include <scsi/libfc.h>
 #include <scsi/libfcoe.h>
+#include <uapi/linux/dcbnl.h>
 
 #include "i40e.h"
 #include "i40e_fcoe.h"
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d9f4972..eddec6b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -4415,13 +4415,13 @@
 
 	switch (vsi->back->hw.phy.link_info.link_speed) {
 	case I40E_LINK_SPEED_40GB:
-		strncpy(speed, "40 Gbps", SPEED_SIZE);
+		strlcpy(speed, "40 Gbps", SPEED_SIZE);
 		break;
 	case I40E_LINK_SPEED_10GB:
-		strncpy(speed, "10 Gbps", SPEED_SIZE);
+		strlcpy(speed, "10 Gbps", SPEED_SIZE);
 		break;
 	case I40E_LINK_SPEED_1GB:
-		strncpy(speed, "1000 Mbps", SPEED_SIZE);
+		strlcpy(speed, "1000 Mbps", SPEED_SIZE);
 		break;
 	default:
 		break;
@@ -4429,16 +4429,16 @@
 
 	switch (vsi->back->hw.fc.current_mode) {
 	case I40E_FC_FULL:
-		strncpy(fc, "RX/TX", FC_SIZE);
+		strlcpy(fc, "RX/TX", FC_SIZE);
 		break;
 	case I40E_FC_TX_PAUSE:
-		strncpy(fc, "TX", FC_SIZE);
+		strlcpy(fc, "TX", FC_SIZE);
 		break;
 	case I40E_FC_RX_PAUSE:
-		strncpy(fc, "RX", FC_SIZE);
+		strlcpy(fc, "RX", FC_SIZE);
 		break;
 	default:
-		strncpy(fc, "None", FC_SIZE);
+		strlcpy(fc, "None", FC_SIZE);
 		break;
 	}
 
@@ -5839,7 +5839,7 @@
 	dv.minor_version = DRV_VERSION_MINOR;
 	dv.build_version = DRV_VERSION_BUILD;
 	dv.subbuild_version = 0;
-	strncpy(dv.driver_string, DRV_VERSION, sizeof(dv.driver_string));
+	strlcpy(dv.driver_string, DRV_VERSION, sizeof(dv.driver_string));
 	i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
 }
 
@@ -6293,7 +6293,7 @@
 
 	if (alloc_qvectors) {
 		/* allocate memory for q_vector pointers */
-		size = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
+		size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
 		vsi->q_vectors = kzalloc(size, GFP_KERNEL);
 		if (!vsi->q_vectors) {
 			ret = -ENOMEM;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 97bda3d..25c4f9a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -251,9 +251,9 @@
  *
  * Writes a 16 bit words buffer to the Shadow RAM using the admin command.
  **/
-i40e_status i40e_write_nvm_aq(struct i40e_hw *hw, u8 module_pointer,
-			      u32 offset, u16 words, void *data,
-			      bool last_command)
+static i40e_status i40e_write_nvm_aq(struct i40e_hw *hw, u8 module_pointer,
+				     u32 offset, u16 words, void *data,
+				     bool last_command)
 {
 	i40e_status ret_code = I40E_ERR_NVM;
 
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index dadd9a5..c9f1d1b 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2969,14 +2969,14 @@
 		/* In the case of a fixed PHY, the DT node associated
 		 * to the PHY is the Ethernet MAC DT node.
 		 */
-		phy_node = dn;
+		phy_node = of_node_get(dn);
 	}
 
 	phy_mode = of_get_phy_mode(dn);
 	if (phy_mode < 0) {
 		dev_err(&pdev->dev, "incorrect phy-mode\n");
 		err = -EINVAL;
-		goto err_free_irq;
+		goto err_put_phy_node;
 	}
 
 	dev->tx_queue_len = MVNETA_MAX_TXD;
@@ -2992,7 +2992,7 @@
 	pp->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(pp->clk)) {
 		err = PTR_ERR(pp->clk);
-		goto err_free_irq;
+		goto err_put_phy_node;
 	}
 
 	clk_prepare_enable(pp->clk);
@@ -3071,6 +3071,8 @@
 	free_percpu(pp->stats);
 err_clk:
 	clk_disable_unprepare(pp->clk);
+err_put_phy_node:
+	of_node_put(phy_node);
 err_free_irq:
 	irq_dispose_mapping(dev->irq);
 err_free_netdev:
@@ -3088,6 +3090,7 @@
 	clk_disable_unprepare(pp->clk);
 	free_percpu(pp->stats);
 	irq_dispose_mapping(dev->irq);
+	of_node_put(pp->phy_node);
 	free_netdev(dev);
 
 	return 0;
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 5d940a2..65a4a0f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -1311,6 +1311,15 @@
 		.wrapper = mlx4_MAD_IFC_wrapper
 	},
 	{
+		.opcode = MLX4_CMD_MAD_DEMUX,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_CMD_EPERM_wrapper
+	},
+	{
 		.opcode = MLX4_CMD_QUERY_IF_STAT,
 		.has_inbox = false,
 		.has_outbox = true,
diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 688e1ea..494753e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -136,7 +136,8 @@
 		[7] = "FSM (MAC anti-spoofing) support",
 		[8] = "Dynamic QP updates support",
 		[9] = "Device managed flow steering IPoIB support",
-		[10] = "TCP/IP offloads/flow-steering for VXLAN support"
+		[10] = "TCP/IP offloads/flow-steering for VXLAN support",
+		[11] = "MAD DEMUX (Secure-Host) support"
 	};
 	int i;
 
@@ -571,6 +572,7 @@
 #define QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET		0xa0
 #define QUERY_DEV_CAP_FW_REASSIGN_MAC		0x9d
 #define QUERY_DEV_CAP_VXLAN			0x9e
+#define QUERY_DEV_CAP_MAD_DEMUX_OFFSET		0xb0
 
 	dev_cap->flags2 = 0;
 	mailbox = mlx4_alloc_cmd_mailbox(dev);
@@ -748,6 +750,11 @@
 		MLX4_GET(dev_cap->max_counters, outbox,
 			 QUERY_DEV_CAP_MAX_COUNTERS_OFFSET);
 
+	MLX4_GET(field32, outbox,
+		 QUERY_DEV_CAP_MAD_DEMUX_OFFSET);
+	if (field32 & (1 << 0))
+		dev_cap->flags2 |= MLX4_DEV_CAP_FLAG2_MAD_DEMUX;
+
 	MLX4_GET(field32, outbox, QUERY_DEV_CAP_EXT_2_FLAGS_OFFSET);
 	if (field32 & (1 << 16))
 		dev_cap->flags2 |= MLX4_DEV_CAP_FLAG2_UPDATE_QP;
@@ -2016,3 +2023,85 @@
 out:
 	mlx4_free_cmd_mailbox(dev, mailbox);
 }
+
+static int mlx4_check_smp_firewall_active(struct mlx4_dev *dev,
+					  struct mlx4_cmd_mailbox *mailbox)
+{
+#define MLX4_CMD_MAD_DEMUX_SET_ATTR_OFFSET		0x10
+#define MLX4_CMD_MAD_DEMUX_GETRESP_ATTR_OFFSET		0x20
+#define MLX4_CMD_MAD_DEMUX_TRAP_ATTR_OFFSET		0x40
+#define MLX4_CMD_MAD_DEMUX_TRAP_REPRESS_ATTR_OFFSET	0x70
+
+	u32 set_attr_mask, getresp_attr_mask;
+	u32 trap_attr_mask, traprepress_attr_mask;
+
+	MLX4_GET(set_attr_mask, mailbox->buf,
+		 MLX4_CMD_MAD_DEMUX_SET_ATTR_OFFSET);
+	mlx4_dbg(dev, "SMP firewall set_attribute_mask = 0x%x\n",
+		 set_attr_mask);
+
+	MLX4_GET(getresp_attr_mask, mailbox->buf,
+		 MLX4_CMD_MAD_DEMUX_GETRESP_ATTR_OFFSET);
+	mlx4_dbg(dev, "SMP firewall getresp_attribute_mask = 0x%x\n",
+		 getresp_attr_mask);
+
+	MLX4_GET(trap_attr_mask, mailbox->buf,
+		 MLX4_CMD_MAD_DEMUX_TRAP_ATTR_OFFSET);
+	mlx4_dbg(dev, "SMP firewall trap_attribute_mask = 0x%x\n",
+		 trap_attr_mask);
+
+	MLX4_GET(traprepress_attr_mask, mailbox->buf,
+		 MLX4_CMD_MAD_DEMUX_TRAP_REPRESS_ATTR_OFFSET);
+	mlx4_dbg(dev, "SMP firewall traprepress_attribute_mask = 0x%x\n",
+		 traprepress_attr_mask);
+
+	if (set_attr_mask && getresp_attr_mask && trap_attr_mask &&
+	    traprepress_attr_mask)
+		return 1;
+
+	return 0;
+}
+
+int mlx4_config_mad_demux(struct mlx4_dev *dev)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	int secure_host_active;
+	int err;
+
+	/* Check if mad_demux is supported */
+	if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_MAD_DEMUX))
+		return 0;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox)) {
+		mlx4_warn(dev, "Failed to allocate mailbox for cmd MAD_DEMUX");
+		return -ENOMEM;
+	}
+
+	/* Query mad_demux to find out which MADs are handled by internal sma */
+	err = mlx4_cmd_box(dev, 0, mailbox->dma, 0x01 /* subn mgmt class */,
+			   MLX4_CMD_MAD_DEMUX_QUERY_RESTR, MLX4_CMD_MAD_DEMUX,
+			   MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
+	if (err) {
+		mlx4_warn(dev, "MLX4_CMD_MAD_DEMUX: query restrictions failed (%d)\n",
+			  err);
+		goto out;
+	}
+
+	secure_host_active = mlx4_check_smp_firewall_active(dev, mailbox);
+
+	/* Config mad_demux to handle all MADs returned by the query above */
+	err = mlx4_cmd(dev, mailbox->dma, 0x01 /* subn mgmt class */,
+		       MLX4_CMD_MAD_DEMUX_CONFIG, MLX4_CMD_MAD_DEMUX,
+		       MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
+	if (err) {
+		mlx4_warn(dev, "MLX4_CMD_MAD_DEMUX: configure failed (%d)\n", err);
+		goto out;
+	}
+
+	if (secure_host_active)
+		mlx4_warn(dev, "HCA operating in secure-host mode. SMP firewall activated.\n");
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 110e020..7e2d5d5 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1853,6 +1853,11 @@
 			mlx4_err(dev, "Failed to initialize multicast group table, aborting\n");
 			goto err_mr_table_free;
 		}
+		err = mlx4_config_mad_demux(dev);
+		if (err) {
+			mlx4_err(dev, "Failed in config_mad_demux, aborting\n");
+			goto err_mcg_table_free;
+		}
 	}
 
 	err = mlx4_init_eq_table(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 13fbcd0..b508c78 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -274,6 +274,8 @@
 #define MLX4_MPT_FLAG_PHYSICAL	    (1 <<  9)
 #define MLX4_MPT_FLAG_REGION	    (1 <<  8)
 
+#define MLX4_MPT_PD_MASK	    (0x1FFFFUL)
+#define MLX4_MPT_PD_VF_MASK	    (0xFE0000UL)
 #define MLX4_MPT_PD_FLAG_FAST_REG   (1 << 27)
 #define MLX4_MPT_PD_FLAG_RAE	    (1 << 28)
 #define MLX4_MPT_PD_FLAG_EN_INV	    (3 << 24)
@@ -1306,5 +1308,6 @@
 int mlx4_get_slave_num_gids(struct mlx4_dev *dev, int slave, int port);
 /* Returns the VF index of slave */
 int mlx4_get_vf_indx(struct mlx4_dev *dev, int slave);
+int mlx4_config_mad_demux(struct mlx4_dev *dev);
 
 #endif /* MLX4_H */
diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index 2839abb..7d717ec 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -298,6 +298,131 @@
 			    MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
 }
 
+int mlx4_mr_hw_get_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+		       struct mlx4_mpt_entry ***mpt_entry)
+{
+	int err;
+	int key = key_to_hw_index(mmr->key) & (dev->caps.num_mpts - 1);
+	struct mlx4_cmd_mailbox *mailbox = NULL;
+
+	/* Make sure that at this point we have single-threaded access only */
+
+	if (mmr->enabled != MLX4_MPT_EN_HW)
+		return -EINVAL;
+
+	err = mlx4_HW2SW_MPT(dev, NULL, key);
+
+	if (err) {
+		mlx4_warn(dev, "HW2SW_MPT failed (%d).", err);
+		mlx4_warn(dev, "Most likely the MR has MWs bound to it.\n");
+		return err;
+	}
+
+	mmr->enabled = MLX4_MPT_EN_SW;
+
+	if (!mlx4_is_mfunc(dev)) {
+		**mpt_entry = mlx4_table_find(
+				&mlx4_priv(dev)->mr_table.dmpt_table,
+				key, NULL);
+	} else {
+		mailbox = mlx4_alloc_cmd_mailbox(dev);
+		if (IS_ERR_OR_NULL(mailbox))
+			return PTR_ERR(mailbox);
+
+		err = mlx4_cmd_box(dev, 0, mailbox->dma, key,
+				   0, MLX4_CMD_QUERY_MPT,
+				   MLX4_CMD_TIME_CLASS_B,
+				   MLX4_CMD_WRAPPED);
+
+		if (err)
+			goto free_mailbox;
+
+		*mpt_entry = (struct mlx4_mpt_entry **)&mailbox->buf;
+	}
+
+	if (!(*mpt_entry) || !(**mpt_entry)) {
+		err = -ENOMEM;
+		goto free_mailbox;
+	}
+
+	return 0;
+
+free_mailbox:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_get_mpt);
+
+int mlx4_mr_hw_write_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+			 struct mlx4_mpt_entry **mpt_entry)
+{
+	int err;
+
+	if (!mlx4_is_mfunc(dev)) {
+		/* Make sure any changes to this entry are flushed */
+		wmb();
+
+		*(u8 *)(*mpt_entry) = MLX4_MPT_STATUS_HW;
+
+		/* Make sure the new status is written */
+		wmb();
+
+		err = mlx4_SYNC_TPT(dev);
+	} else {
+		int key = key_to_hw_index(mmr->key) & (dev->caps.num_mpts - 1);
+
+		struct mlx4_cmd_mailbox *mailbox =
+			container_of((void *)mpt_entry, struct mlx4_cmd_mailbox,
+				     buf);
+
+		err = mlx4_SW2HW_MPT(dev, mailbox, key);
+	}
+
+	mmr->pd = be32_to_cpu((*mpt_entry)->pd_flags) & MLX4_MPT_PD_MASK;
+	if (!err)
+		mmr->enabled = MLX4_MPT_EN_HW;
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_write_mpt);
+
+void mlx4_mr_hw_put_mpt(struct mlx4_dev *dev,
+			struct mlx4_mpt_entry **mpt_entry)
+{
+	if (mlx4_is_mfunc(dev)) {
+		struct mlx4_cmd_mailbox *mailbox =
+			container_of((void *)mpt_entry, struct mlx4_cmd_mailbox,
+				     buf);
+		mlx4_free_cmd_mailbox(dev, mailbox);
+	}
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_put_mpt);
+
+int mlx4_mr_hw_change_pd(struct mlx4_dev *dev, struct mlx4_mpt_entry *mpt_entry,
+			 u32 pdn)
+{
+	u32 pd_flags = be32_to_cpu(mpt_entry->pd_flags);
+	/* The wrapper function will put the slave's id here */
+	if (mlx4_is_mfunc(dev))
+		pd_flags &= ~MLX4_MPT_PD_VF_MASK;
+	mpt_entry->pd_flags = cpu_to_be32((pd_flags &  ~MLX4_MPT_PD_MASK) |
+					  (pdn & MLX4_MPT_PD_MASK)
+					  | MLX4_MPT_PD_FLAG_EN_INV);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_change_pd);
+
+int mlx4_mr_hw_change_access(struct mlx4_dev *dev,
+			     struct mlx4_mpt_entry *mpt_entry,
+			     u32 access)
+{
+	u32 flags = (be32_to_cpu(mpt_entry->flags) & ~MLX4_PERM_MASK) |
+		    (access & MLX4_PERM_MASK);
+
+	mpt_entry->flags = cpu_to_be32(flags);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_change_access);
+
 static int mlx4_mr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd,
 			   u64 iova, u64 size, u32 access, int npages,
 			   int page_shift, struct mlx4_mr *mr)
@@ -463,6 +588,41 @@
 }
 EXPORT_SYMBOL_GPL(mlx4_mr_free);
 
+void mlx4_mr_rereg_mem_cleanup(struct mlx4_dev *dev, struct mlx4_mr *mr)
+{
+	mlx4_mtt_cleanup(dev, &mr->mtt);
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_rereg_mem_cleanup);
+
+int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
+			    u64 iova, u64 size, int npages,
+			    int page_shift, struct mlx4_mpt_entry *mpt_entry)
+{
+	int err;
+
+	mpt_entry->start       = cpu_to_be64(mr->iova);
+	mpt_entry->length      = cpu_to_be64(mr->size);
+	mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift);
+
+	err = mlx4_mtt_init(dev, npages, page_shift, &mr->mtt);
+	if (err)
+		return err;
+
+	if (mr->mtt.order < 0) {
+		mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL);
+		mpt_entry->mtt_addr = 0;
+	} else {
+		mpt_entry->mtt_addr = cpu_to_be64(mlx4_mtt_addr(dev,
+						  &mr->mtt));
+		if (mr->mtt.page_shift == 0)
+			mpt_entry->mtt_sz    = cpu_to_be32(1 << mr->mtt.order);
+	}
+	mr->enabled = MLX4_MPT_EN_SW;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_rereg_mem_write);
+
 int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr)
 {
 	struct mlx4_cmd_mailbox *mailbox;
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 0efc136..1089367 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -2613,12 +2613,34 @@
 	if (err)
 		return err;
 
-	if (mpt->com.from_state != RES_MPT_HW) {
+	if (mpt->com.from_state == RES_MPT_MAPPED) {
+		/* In order to allow rereg in SRIOV, we need to alter the MPT entry. To do
+		 * that, the VF must read the MPT. But since the MPT entry memory is not
+		 * in the VF's virtual memory space, it must use QUERY_MPT to obtain the
+		 * entry contents. To guarantee that the MPT cannot be changed, the driver
+		 * must perform HW2SW_MPT before this query and return the MPT entry to HW
+		 * ownership fofollowing the change. The change here allows the VF to
+		 * perform QUERY_MPT also when the entry is in SW ownership.
+		 */
+		struct mlx4_mpt_entry *mpt_entry = mlx4_table_find(
+					&mlx4_priv(dev)->mr_table.dmpt_table,
+					mpt->key, NULL);
+
+		if (NULL == mpt_entry || NULL == outbox->buf) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		memcpy(outbox->buf, mpt_entry, sizeof(*mpt_entry));
+
+		err = 0;
+	} else if (mpt->com.from_state == RES_MPT_HW) {
+		err = mlx4_DMA_wrapper(dev, slave, vhcr, inbox, outbox, cmd);
+	} else {
 		err = -EBUSY;
 		goto out;
 	}
 
-	err = mlx4_DMA_wrapper(dev, slave, vhcr, inbox, outbox, cmd);
 
 out:
 	put_res(dev, slave, id, RES_MPT);
diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index 4421004..9e7e3f1 100644
--- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
+++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
@@ -574,6 +574,7 @@
 
 	/* save firmware version for ethtool */
 	strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
+	mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
 
 	sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 	       &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
@@ -872,6 +873,10 @@
 		return -ENOMEM;
 	dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 				   DMA_BIDIRECTIONAL);
+	if (unlikely(pci_dma_mapping_error(mgp->pdev, dmatest_bus))) {
+		__free_page(dmatest_page);
+		return -ENOMEM;
+	}
 
 	/* Run a small DMA test.
 	 * The magic multipliers to the length tell the firmware
@@ -1293,6 +1298,7 @@
 			int bytes, int watchdog)
 {
 	struct page *page;
+	dma_addr_t bus;
 	int idx;
 #if MYRI10GE_ALLOC_SIZE > 4096
 	int end_offset;
@@ -1317,11 +1323,21 @@
 					rx->watchdog_needed = 1;
 				return;
 			}
+
+			bus = pci_map_page(mgp->pdev, page, 0,
+					   MYRI10GE_ALLOC_SIZE,
+					   PCI_DMA_FROMDEVICE);
+			if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
+				__free_pages(page, MYRI10GE_ALLOC_ORDER);
+				if (rx->fill_cnt - rx->cnt < 16)
+					rx->watchdog_needed = 1;
+				return;
+			}
+
 			rx->page = page;
 			rx->page_offset = 0;
-			rx->bus = pci_map_page(mgp->pdev, page, 0,
-					       MYRI10GE_ALLOC_SIZE,
-					       PCI_DMA_FROMDEVICE);
+			rx->bus = bus;
+
 		}
 		rx->info[idx].page = rx->page;
 		rx->info[idx].page_offset = rx->page_offset;
@@ -2763,6 +2779,35 @@
 	mb();
 }
 
+static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
+				  struct myri10ge_tx_buf *tx, int idx)
+{
+	unsigned int len;
+	int last_idx;
+
+	/* Free any DMA resources we've alloced and clear out the skb slot */
+	last_idx = (idx + 1) & tx->mask;
+	idx = tx->req & tx->mask;
+	do {
+		len = dma_unmap_len(&tx->info[idx], len);
+		if (len) {
+			if (tx->info[idx].skb != NULL)
+				pci_unmap_single(mgp->pdev,
+						 dma_unmap_addr(&tx->info[idx],
+								bus), len,
+						 PCI_DMA_TODEVICE);
+			else
+				pci_unmap_page(mgp->pdev,
+					       dma_unmap_addr(&tx->info[idx],
+							      bus), len,
+					       PCI_DMA_TODEVICE);
+			dma_unmap_len_set(&tx->info[idx], len, 0);
+			tx->info[idx].skb = NULL;
+		}
+		idx = (idx + 1) & tx->mask;
+	} while (idx != last_idx);
+}
+
 /*
  * Transmit a packet.  We need to split the packet so that a single
  * segment does not cross myri10ge->tx_boundary, so this makes segment
@@ -2786,7 +2831,7 @@
 	u32 low;
 	__be32 high_swapped;
 	unsigned int len;
-	int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
+	int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
 	u16 pseudo_hdr_offset, cksum_offset, queue;
 	int cum_len, seglen, boundary, rdma_count;
 	u8 flags, odd_flag;
@@ -2883,9 +2928,12 @@
 
 	/* map the skb for DMA */
 	len = skb_headlen(skb);
+	bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
+	if (unlikely(pci_dma_mapping_error(mgp->pdev, bus)))
+		goto drop;
+
 	idx = tx->req & tx->mask;
 	tx->info[idx].skb = skb;
-	bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
 	dma_unmap_addr_set(&tx->info[idx], bus, bus);
 	dma_unmap_len_set(&tx->info[idx], len, len);
 
@@ -2984,12 +3032,16 @@
 			break;
 
 		/* map next fragment for DMA */
-		idx = (count + tx->req) & tx->mask;
 		frag = &skb_shinfo(skb)->frags[frag_idx];
 		frag_idx++;
 		len = skb_frag_size(frag);
 		bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
 				       DMA_TO_DEVICE);
+		if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
+			myri10ge_unmap_tx_dma(mgp, tx, idx);
+			goto drop;
+		}
+		idx = (count + tx->req) & tx->mask;
 		dma_unmap_addr_set(&tx->info[idx], bus, bus);
 		dma_unmap_len_set(&tx->info[idx], len, len);
 	}
@@ -3020,31 +3072,8 @@
 	return NETDEV_TX_OK;
 
 abort_linearize:
-	/* Free any DMA resources we've alloced and clear out the skb
-	 * slot so as to not trip up assertions, and to avoid a
-	 * double-free if linearizing fails */
+	myri10ge_unmap_tx_dma(mgp, tx, idx);
 
-	last_idx = (idx + 1) & tx->mask;
-	idx = tx->req & tx->mask;
-	tx->info[idx].skb = NULL;
-	do {
-		len = dma_unmap_len(&tx->info[idx], len);
-		if (len) {
-			if (tx->info[idx].skb != NULL)
-				pci_unmap_single(mgp->pdev,
-						 dma_unmap_addr(&tx->info[idx],
-								bus), len,
-						 PCI_DMA_TODEVICE);
-			else
-				pci_unmap_page(mgp->pdev,
-					       dma_unmap_addr(&tx->info[idx],
-							      bus), len,
-					       PCI_DMA_TODEVICE);
-			dma_unmap_len_set(&tx->info[idx], len, 0);
-			tx->info[idx].skb = NULL;
-		}
-		idx = (idx + 1) & tx->mask;
-	} while (idx != last_idx);
 	if (skb_is_gso(skb)) {
 		netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
 		goto drop;
diff --git a/drivers/net/ethernet/qlogic/qlcnic/Makefile b/drivers/net/ethernet/qlogic/qlcnic/Makefile
index a848d29..3c2c2c7 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/Makefile
+++ b/drivers/net/ethernet/qlogic/qlcnic/Makefile
@@ -8,7 +8,7 @@
 	qlcnic_ethtool.o qlcnic_ctx.o qlcnic_io.o \
 	qlcnic_sysfs.o qlcnic_minidump.o qlcnic_83xx_hw.o \
 	qlcnic_83xx_init.o qlcnic_83xx_vnic.o \
-	qlcnic_minidump.o qlcnic_sriov_common.o
+	qlcnic_sriov_common.o
 
 qlcnic-$(CONFIG_QLCNIC_SRIOV) += qlcnic_sriov_pf.o
 
diff --git a/drivers/net/ethernet/smsc/smsc911x.h b/drivers/net/ethernet/smsc/smsc911x.h
index 2395395..54d6489 100644
--- a/drivers/net/ethernet/smsc/smsc911x.h
+++ b/drivers/net/ethernet/smsc/smsc911x.h
@@ -51,7 +51,7 @@
 
 #ifdef CONFIG_DEBUG_SPINLOCK
 #define SMSC_ASSERT_MAC_LOCK(pdata) \
-		WARN_ON(!spin_is_locked(&pdata->mac_lock))
+		WARN_ON_SMP(!spin_is_locked(&pdata->mac_lock))
 #else
 #define SMSC_ASSERT_MAC_LOCK(pdata) do {} while (0)
 #endif				/* CONFIG_DEBUG_SPINLOCK */
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index d813bfb..23c89ab 100644
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -32,6 +32,11 @@
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_MODULE_VERSION);
 
+/* Heuristic for the number of times to exponentially backoff and
+ * retry sending an LDC trigger when EAGAIN is encountered
+ */
+#define	VNET_MAX_RETRIES	10
+
 /* Ordered from largest major to lowest */
 static struct vio_version vnet_versions[] = {
 	{ .major = 1, .minor = 0 },
@@ -260,6 +265,7 @@
 		.state			= vio_dring_state,
 	};
 	int err, delay;
+	int retries = 0;
 
 	hdr.seq = dr->snd_nxt;
 	delay = 1;
@@ -272,6 +278,13 @@
 		udelay(delay);
 		if ((delay <<= 1) > 128)
 			delay = 128;
+		if (retries++ > VNET_MAX_RETRIES) {
+			pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n",
+				port->raddr[0], port->raddr[1],
+				port->raddr[2], port->raddr[3],
+				port->raddr[4], port->raddr[5]);
+			err = -ECONNRESET;
+		}
 	} while (err == -EAGAIN);
 
 	return err;
@@ -475,8 +488,9 @@
 	return 0;
 }
 
-static void maybe_tx_wakeup(struct vnet *vp)
+static void maybe_tx_wakeup(unsigned long param)
 {
+	struct vnet *vp = (struct vnet *)param;
 	struct net_device *dev = vp->dev;
 
 	netif_tx_lock(dev);
@@ -573,8 +587,13 @@
 			break;
 	}
 	spin_unlock(&vio->lock);
+	/* Kick off a tasklet to wake the queue.  We cannot call
+	 * maybe_tx_wakeup directly here because we could deadlock on
+	 * netif_tx_lock() with dev_watchdog()
+	 */
 	if (unlikely(tx_wakeup && err != -ECONNRESET))
-		maybe_tx_wakeup(port->vp);
+		tasklet_schedule(&port->vp->vnet_tx_wakeup);
+
 	local_irq_restore(flags);
 }
 
@@ -593,6 +612,7 @@
 		.end_idx		= (u32) -1,
 	};
 	int err, delay;
+	int retries = 0;
 
 	hdr.seq = dr->snd_nxt;
 	delay = 1;
@@ -605,6 +625,8 @@
 		udelay(delay);
 		if ((delay <<= 1) > 128)
 			delay = 128;
+		if (retries++ > VNET_MAX_RETRIES)
+			break;
 	} while (err == -EAGAIN);
 
 	return err;
@@ -691,7 +713,15 @@
 		memset(tx_buf+VNET_PACKET_SKIP+skb->len, 0, len - skb->len);
 	}
 
-	d->hdr.ack = VIO_ACK_ENABLE;
+	/* We don't rely on the ACKs to free the skb in vnet_start_xmit(),
+	 * thus it is safe to not set VIO_ACK_ENABLE for each transmission:
+	 * the protocol itself does not require it as long as the peer
+	 * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED.
+	 *
+	 * An ACK for every packet in the ring is expensive as the
+	 * sending of LDC messages is slow and affects performance.
+	 */
+	d->hdr.ack = VIO_ACK_DISABLE;
 	d->size = len;
 	d->ncookies = port->tx_bufs[dr->prod].ncookies;
 	for (i = 0; i < d->ncookies; i++)
@@ -1046,6 +1076,7 @@
 	vp = netdev_priv(dev);
 
 	spin_lock_init(&vp->lock);
+	tasklet_init(&vp->vnet_tx_wakeup, maybe_tx_wakeup, (unsigned long)vp);
 	vp->dev = dev;
 
 	INIT_LIST_HEAD(&vp->port_list);
@@ -1105,6 +1136,7 @@
 		vp = list_first_entry(&vnet_list, struct vnet, list);
 		list_del(&vp->list);
 		dev = vp->dev;
+		tasklet_kill(&vp->vnet_tx_wakeup);
 		/* vio_unregister_driver() should have cleaned up port_list */
 		BUG_ON(!list_empty(&vp->port_list));
 		unregister_netdev(dev);
diff --git a/drivers/net/ethernet/sun/sunvnet.h b/drivers/net/ethernet/sun/sunvnet.h
index d347a5b..de5c2c6 100644
--- a/drivers/net/ethernet/sun/sunvnet.h
+++ b/drivers/net/ethernet/sun/sunvnet.h
@@ -1,6 +1,8 @@
 #ifndef _SUNVNET_H
 #define _SUNVNET_H
 
+#include <linux/interrupt.h>
+
 #define DESC_NCOOKIES(entry_size)	\
 	((entry_size) - sizeof(struct vio_net_desc))
 
@@ -78,6 +80,8 @@
 
 	struct list_head	list;
 	u64			local_mac;
+
+	struct tasklet_struct	vnet_tx_wakeup;
 };
 
 #endif /* _SUNVNET_H */
diff --git a/drivers/net/ethernet/ti/cpmac.c b/drivers/net/ethernet/ti/cpmac.c
index 3809f4e..f9bcf7a 100644
--- a/drivers/net/ethernet/ti/cpmac.c
+++ b/drivers/net/ethernet/ti/cpmac.c
@@ -1130,6 +1130,7 @@
 		strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */
 		phy_id = pdev->id;
 	}
+	mdio_bus_id[sizeof(mdio_bus_id) - 1] = '\0';
 
 	dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES);
 	if (!dev)
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 8a6e5c2..fda5891 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -1148,8 +1148,7 @@
 	temac_mdio_teardown(lp);
 	unregister_netdev(ndev);
 	sysfs_remove_group(&lp->dev->kobj, &temac_attr_group);
-	if (lp->phy_node)
-		of_node_put(lp->phy_node);
+	of_node_put(lp->phy_node);
 	lp->phy_node = NULL;
 	iounmap(lp->regs);
 	if (lp->sdma_regs)
@@ -1171,7 +1170,6 @@
 	.probe = temac_of_probe,
 	.remove = temac_of_remove,
 	.driver = {
-		.owner = THIS_MODULE,
 		.name = "xilinx_temac",
 		.of_match_table = temac_of_match,
 	},
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 7b0a735..c8fd941 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -1630,8 +1630,7 @@
 	axienet_mdio_teardown(lp);
 	unregister_netdev(ndev);
 
-	if (lp->phy_node)
-		of_node_put(lp->phy_node);
+	of_node_put(lp->phy_node);
 	lp->phy_node = NULL;
 
 	iounmap(lp->regs);
@@ -1646,7 +1645,6 @@
 	.probe = axienet_of_probe,
 	.remove = axienet_of_remove,
 	.driver = {
-		 .owner = THIS_MODULE,
 		 .name = "xilinx_axienet",
 		 .of_match_table = axienet_of_match,
 	},
diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index 782bb93..28dbbdc 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -1245,7 +1245,6 @@
 static struct platform_driver xemaclite_of_driver = {
 	.driver = {
 		.name = DRIVER_NAME,
-		.owner = THIS_MODULE,
 		.of_match_table = xemaclite_of_match,
 	},
 	.probe		= xemaclite_of_probe,
diff --git a/drivers/net/ethernet/xircom/xirc2ps_cs.c b/drivers/net/ethernet/xircom/xirc2ps_cs.c
index 7c81ffb..d56f869 100644
--- a/drivers/net/ethernet/xircom/xirc2ps_cs.c
+++ b/drivers/net/ethernet/xircom/xirc2ps_cs.c
@@ -266,7 +266,7 @@
 
 static irqreturn_t xirc2ps_interrupt(int irq, void *dev_id);
 
-typedef struct local_info_t {
+struct local_info {
 	struct net_device	*dev;
 	struct pcmcia_device	*p_dev;
 
@@ -281,7 +281,7 @@
     unsigned last_ptr_value; /* last packets transmitted value */
     const char *manf_str;
     struct work_struct tx_timeout_task;
-} local_info_t;
+};
 
 /****************
  * Some more prototypes
@@ -475,12 +475,12 @@
 xirc2ps_probe(struct pcmcia_device *link)
 {
     struct net_device *dev;
-    local_info_t *local;
+    struct local_info *local;
 
     dev_dbg(&link->dev, "attach()\n");
 
     /* Allocate the device structure */
-    dev = alloc_etherdev(sizeof(local_info_t));
+    dev = alloc_etherdev(sizeof(struct local_info));
     if (!dev)
 	    return -ENOMEM;
     local = netdev_priv(dev);
@@ -536,7 +536,7 @@
 set_card_type(struct pcmcia_device *link)
 {
     struct net_device *dev = link->priv;
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     u8 *buf;
     unsigned int cisrev, mediaid, prodid;
     size_t len;
@@ -690,7 +690,7 @@
 xirc2ps_config(struct pcmcia_device * link)
 {
     struct net_device *dev = link->priv;
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     unsigned int ioaddr;
     int err;
     u8 *buf;
@@ -931,7 +931,7 @@
 
 	if (link->resource[2]->end) {
 		struct net_device *dev = link->priv;
-		local_info_t *local = netdev_priv(dev);
+		struct local_info *local = netdev_priv(dev);
 		if (local->dingo)
 			iounmap(local->dingo_ccr - 0x0800);
 	}
@@ -975,7 +975,7 @@
 xirc2ps_interrupt(int irq, void *dev_id)
 {
     struct net_device *dev = (struct net_device *)dev_id;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr;
     u_char saved_page;
     unsigned bytes_rcvd;
@@ -1194,8 +1194,8 @@
 static void
 xirc2ps_tx_timeout_task(struct work_struct *work)
 {
-	local_info_t *local =
-		container_of(work, local_info_t, tx_timeout_task);
+	struct local_info *local =
+		container_of(work, struct local_info, tx_timeout_task);
 	struct net_device *dev = local->dev;
     /* reset the card */
     do_reset(dev,1);
@@ -1206,7 +1206,7 @@
 static void
 xirc_tx_timeout(struct net_device *dev)
 {
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     dev->stats.tx_errors++;
     netdev_notice(dev, "transmit timed out\n");
     schedule_work(&lp->tx_timeout_task);
@@ -1215,7 +1215,7 @@
 static netdev_tx_t
 do_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     int okay;
     unsigned freespace;
@@ -1300,7 +1300,7 @@
 static void set_addresses(struct net_device *dev)
 {
 	unsigned int ioaddr = dev->base_addr;
-	local_info_t *lp = netdev_priv(dev);
+	struct local_info *lp = netdev_priv(dev);
 	struct netdev_hw_addr *ha;
 	struct set_address_info sa_info;
 	int i;
@@ -1362,7 +1362,7 @@
 static int
 do_config(struct net_device *dev, struct ifmap *map)
 {
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
 
     pr_debug("do_config(%p)\n", dev);
     if (map->port != 255 && map->port != dev->if_port) {
@@ -1387,7 +1387,7 @@
 static int
 do_open(struct net_device *dev)
 {
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     struct pcmcia_device *link = lp->p_dev;
 
     dev_dbg(&link->dev, "do_open(%p)\n", dev);
@@ -1421,7 +1421,7 @@
 static int
 do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     struct mii_ioctl_data *data = if_mii(rq);
 
@@ -1453,7 +1453,7 @@
 static void
 hardreset(struct net_device *dev)
 {
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
 
     SelectPage(4);
@@ -1470,7 +1470,7 @@
 static void
 do_reset(struct net_device *dev, int full)
 {
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     unsigned value;
 
@@ -1631,7 +1631,7 @@
 static int
 init_mii(struct net_device *dev)
 {
-    local_info_t *local = netdev_priv(dev);
+    struct local_info *local = netdev_priv(dev);
     unsigned int ioaddr = dev->base_addr;
     unsigned control, status, linkpartner;
     int i;
@@ -1715,7 +1715,7 @@
 do_stop(struct net_device *dev)
 {
     unsigned int ioaddr = dev->base_addr;
-    local_info_t *lp = netdev_priv(dev);
+    struct local_info *lp = netdev_priv(dev);
     struct pcmcia_device *link = lp->p_dev;
 
     dev_dbg(&link->dev, "do_stop(%p)\n", dev);
diff --git a/drivers/net/irda/donauboe.c b/drivers/net/irda/donauboe.c
index 9fd0c20..a87a82c 100644
--- a/drivers/net/irda/donauboe.c
+++ b/drivers/net/irda/donauboe.c
@@ -1755,17 +1755,4 @@
 	.resume		= toshoboe_wakeup 
 };
 
-static int __init
-donauboe_init (void)
-{
-  return pci_register_driver(&donauboe_pci_driver);
-}
-
-static void __exit
-donauboe_cleanup (void)
-{
-  pci_unregister_driver(&donauboe_pci_driver);
-}
-
-module_init(donauboe_init);
-module_exit(donauboe_cleanup);
+module_pci_driver(donauboe_pci_driver);
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index ef8a5c2..60e4ca0 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -45,10 +45,9 @@
 	struct sk_buff_head	bc_queue;
 	struct work_struct	bc_work;
 	bool 			passthru;
+	int			count;
 };
 
-#define MACVLAN_PORT_IS_EMPTY(port)    list_empty(&port->vlans)
-
 struct macvlan_skb_cb {
 	const struct macvlan_dev *src;
 };
@@ -667,7 +666,8 @@
 
 	free_percpu(vlan->pcpu_stats);
 
-	if (MACVLAN_PORT_IS_EMPTY(port))
+	port->count -= 1;
+	if (!port->count)
 		macvlan_port_destroy(port->dev);
 }
 
@@ -1020,12 +1020,13 @@
 		vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
 
 	if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
-		if (!MACVLAN_PORT_IS_EMPTY(port))
+		if (port->count)
 			return -EINVAL;
 		port->passthru = true;
 		eth_hw_addr_inherit(dev, lowerdev);
 	}
 
+	port->count += 1;
 	err = register_netdevice(dev);
 	if (err < 0)
 		goto destroy_port;
@@ -1043,7 +1044,8 @@
 unregister_netdev:
 	unregister_netdevice(dev);
 destroy_port:
-	if (MACVLAN_PORT_IS_EMPTY(port))
+	port->count -= 1;
+	if (!port->count)
 		macvlan_port_destroy(lowerdev);
 
 	return err;
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
index 7cc64ea..e5c7e61 100644
--- a/drivers/net/wan/hdlc_fr.c
+++ b/drivers/net/wan/hdlc_fr.c
@@ -90,7 +90,7 @@
 #define LMI_ANSI_LENGTH		  14
 
 
-typedef struct {
+struct fr_hdr {
 #if defined(__LITTLE_ENDIAN_BITFIELD)
 	unsigned ea1:	1;
 	unsigned cr:	1;
@@ -112,14 +112,14 @@
 	unsigned de:	1;
 	unsigned ea2:	1;
 #endif
-}__packed fr_hdr;
+} __packed;
 
 
-typedef struct pvc_device_struct {
+struct pvc_device {
 	struct net_device *frad;
 	struct net_device *main;
 	struct net_device *ether;	/* bridged Ethernet interface	*/
-	struct pvc_device_struct *next;	/* Sorted in ascending DLCI order */
+	struct pvc_device *next;	/* Sorted in ascending DLCI order */
 	int dlci;
 	int open_count;
 
@@ -132,11 +132,11 @@
 		unsigned int becn: 1;
 		unsigned int bandwidth;	/* Cisco LMI reporting only */
 	}state;
-}pvc_device;
+};
 
 struct frad_state {
 	fr_proto settings;
-	pvc_device *first_pvc;
+	struct pvc_device *first_pvc;
 	int dce_pvc_count;
 
 	struct timer_list timer;
@@ -174,9 +174,9 @@
 }
 
 
-static inline pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci)
+static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
 {
-	pvc_device *pvc = state(hdlc)->first_pvc;
+	struct pvc_device *pvc = state(hdlc)->first_pvc;
 
 	while (pvc) {
 		if (pvc->dlci == dlci)
@@ -190,10 +190,10 @@
 }
 
 
-static pvc_device* add_pvc(struct net_device *dev, u16 dlci)
+static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci)
 {
 	hdlc_device *hdlc = dev_to_hdlc(dev);
-	pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
+	struct pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
 
 	while (*pvc_p) {
 		if ((*pvc_p)->dlci == dlci)
@@ -203,7 +203,7 @@
 		pvc_p = &(*pvc_p)->next;
 	}
 
-	pvc = kzalloc(sizeof(pvc_device), GFP_ATOMIC);
+	pvc = kzalloc(sizeof(*pvc), GFP_ATOMIC);
 #ifdef DEBUG_PVC
 	printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev);
 #endif
@@ -218,13 +218,13 @@
 }
 
 
-static inline int pvc_is_used(pvc_device *pvc)
+static inline int pvc_is_used(struct pvc_device *pvc)
 {
 	return pvc->main || pvc->ether;
 }
 
 
-static inline void pvc_carrier(int on, pvc_device *pvc)
+static inline void pvc_carrier(int on, struct pvc_device *pvc)
 {
 	if (on) {
 		if (pvc->main)
@@ -246,11 +246,11 @@
 
 static inline void delete_unused_pvcs(hdlc_device *hdlc)
 {
-	pvc_device **pvc_p = &state(hdlc)->first_pvc;
+	struct pvc_device **pvc_p = &state(hdlc)->first_pvc;
 
 	while (*pvc_p) {
 		if (!pvc_is_used(*pvc_p)) {
-			pvc_device *pvc = *pvc_p;
+			struct pvc_device *pvc = *pvc_p;
 #ifdef DEBUG_PVC
 			printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc);
 #endif
@@ -263,7 +263,8 @@
 }
 
 
-static inline struct net_device** get_dev_p(pvc_device *pvc, int type)
+static inline struct net_device **get_dev_p(struct pvc_device *pvc,
+					    int type)
 {
 	if (type == ARPHRD_ETHER)
 		return &pvc->ether;
@@ -342,7 +343,7 @@
 
 static int pvc_open(struct net_device *dev)
 {
-	pvc_device *pvc = dev->ml_priv;
+	struct pvc_device *pvc = dev->ml_priv;
 
 	if ((pvc->frad->flags & IFF_UP) == 0)
 		return -EIO;  /* Frad must be UP in order to activate PVC */
@@ -362,7 +363,7 @@
 
 static int pvc_close(struct net_device *dev)
 {
-	pvc_device *pvc = dev->ml_priv;
+	struct pvc_device *pvc = dev->ml_priv;
 
 	if (--pvc->open_count == 0) {
 		hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
@@ -381,7 +382,7 @@
 
 static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
-	pvc_device *pvc = dev->ml_priv;
+	struct pvc_device *pvc = dev->ml_priv;
 	fr_proto_pvc_info info;
 
 	if (ifr->ifr_settings.type == IF_GET_PROTO) {
@@ -409,7 +410,7 @@
 
 static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-	pvc_device *pvc = dev->ml_priv;
+	struct pvc_device *pvc = dev->ml_priv;
 
 	if (pvc->state.active) {
 		if (dev->type == ARPHRD_ETHER) {
@@ -444,7 +445,7 @@
 	return NETDEV_TX_OK;
 }
 
-static inline void fr_log_dlci_active(pvc_device *pvc)
+static inline void fr_log_dlci_active(struct pvc_device *pvc)
 {
 	netdev_info(pvc->frad, "DLCI %d [%s%s%s]%s %s\n",
 		    pvc->dlci,
@@ -469,7 +470,7 @@
 {
 	hdlc_device *hdlc = dev_to_hdlc(dev);
 	struct sk_buff *skb;
-	pvc_device *pvc = state(hdlc)->first_pvc;
+	struct pvc_device *pvc = state(hdlc)->first_pvc;
 	int lmi = state(hdlc)->settings.lmi;
 	int dce = state(hdlc)->settings.dce;
 	int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
@@ -566,7 +567,7 @@
 static void fr_set_link_state(int reliable, struct net_device *dev)
 {
 	hdlc_device *hdlc = dev_to_hdlc(dev);
-	pvc_device *pvc = state(hdlc)->first_pvc;
+	struct pvc_device *pvc = state(hdlc)->first_pvc;
 
 	state(hdlc)->reliable = reliable;
 	if (reliable) {
@@ -652,7 +653,7 @@
 static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
 {
 	hdlc_device *hdlc = dev_to_hdlc(dev);
-	pvc_device *pvc;
+	struct pvc_device *pvc;
 	u8 rxseq, txseq;
 	int lmi = state(hdlc)->settings.lmi;
 	int dce = state(hdlc)->settings.dce;
@@ -869,10 +870,10 @@
 {
 	struct net_device *frad = skb->dev;
 	hdlc_device *hdlc = dev_to_hdlc(frad);
-	fr_hdr *fh = (fr_hdr*)skb->data;
+	struct fr_hdr *fh = (struct fr_hdr *)skb->data;
 	u8 *data = skb->data;
 	u16 dlci;
-	pvc_device *pvc;
+	struct pvc_device *pvc;
 	struct net_device *dev = NULL;
 
 	if (skb->len <= 4 || fh->ea1 || data[2] != FR_UI)
@@ -1028,7 +1029,7 @@
 static void fr_close(struct net_device *dev)
 {
 	hdlc_device *hdlc = dev_to_hdlc(dev);
-	pvc_device *pvc = state(hdlc)->first_pvc;
+	struct pvc_device *pvc = state(hdlc)->first_pvc;
 
 	while (pvc) {		/* Shutdown all PVCs for this FRAD */
 		if (pvc->main)
@@ -1060,7 +1061,7 @@
 static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
 {
 	hdlc_device *hdlc = dev_to_hdlc(frad);
-	pvc_device *pvc;
+	struct pvc_device *pvc;
 	struct net_device *dev;
 	int used;
 
@@ -1117,7 +1118,7 @@
 
 static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
 {
-	pvc_device *pvc;
+	struct pvc_device *pvc;
 	struct net_device *dev;
 
 	if ((pvc = find_pvc(hdlc, dlci)) == NULL)
@@ -1145,13 +1146,13 @@
 static void fr_destroy(struct net_device *frad)
 {
 	hdlc_device *hdlc = dev_to_hdlc(frad);
-	pvc_device *pvc = state(hdlc)->first_pvc;
+	struct pvc_device *pvc = state(hdlc)->first_pvc;
 	state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
 	state(hdlc)->dce_pvc_count = 0;
 	state(hdlc)->dce_changed = 1;
 
 	while (pvc) {
-		pvc_device *next = pvc->next;
+		struct pvc_device *next = pvc->next;
 		/* destructors will free_netdev() main and ether */
 		if (pvc->main)
 			unregister_netdevice(pvc->main);
diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
index dc2fc23..e73f138 100644
--- a/drivers/net/wan/wanxl.c
+++ b/drivers/net/wan/wanxl.c
@@ -54,24 +54,24 @@
 #define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
 
 
-typedef struct {
+struct port {
 	struct net_device *dev;
-	struct card_t *card;
+	struct card *card;
 	spinlock_t lock;	/* for wanxl_xmit */
         int node;		/* physical port #0 - 3 */
 	unsigned int clock_type;
 	int tx_in, tx_out;
 	struct sk_buff *tx_skbs[TX_BUFFERS];
-}port_t;
+};
 
 
-typedef struct {
+struct card_status {
 	desc_t rx_descs[RX_QUEUE_LENGTH];
 	port_status_t port_status[4];
-}card_status_t;
+};
 
 
-typedef struct card_t {
+struct card {
 	int n_ports;		/* 1, 2 or 4 ports */
 	u8 irq;
 
@@ -79,20 +79,20 @@
 	struct pci_dev *pdev;	/* for pci_name(pdev) */
 	int rx_in;
 	struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
-	card_status_t *status;	/* shared between host and card */
+	struct card_status *status;	/* shared between host and card */
 	dma_addr_t status_address;
-	port_t ports[0];	/* 1 - 4 port_t structures follow */
-}card_t;
+	struct port ports[0];	/* 1 - 4 port structures follow */
+};
 
 
 
-static inline port_t* dev_to_port(struct net_device *dev)
+static inline struct port *dev_to_port(struct net_device *dev)
 {
-        return (port_t *)dev_to_hdlc(dev)->priv;
+	return (struct port *)dev_to_hdlc(dev)->priv;
 }
 
 
-static inline port_status_t* get_status(port_t *port)
+static inline port_status_t *get_status(struct port *port)
 {
 	return &port->card->status->port_status[port->node];
 }
@@ -115,7 +115,7 @@
 
 
 /* Cable and/or personality module change interrupt service */
-static inline void wanxl_cable_intr(port_t *port)
+static inline void wanxl_cable_intr(struct port *port)
 {
 	u32 value = get_status(port)->cable;
 	int valid = 1;
@@ -160,7 +160,7 @@
 
 
 /* Transmit complete interrupt service */
-static inline void wanxl_tx_intr(port_t *port)
+static inline void wanxl_tx_intr(struct port *port)
 {
 	struct net_device *dev = port->dev;
 	while (1) {
@@ -193,7 +193,7 @@
 
 
 /* Receive complete interrupt service */
-static inline void wanxl_rx_intr(card_t *card)
+static inline void wanxl_rx_intr(struct card *card)
 {
 	desc_t *desc;
 	while (desc = &card->status->rx_descs[card->rx_in],
@@ -203,7 +203,7 @@
 				pci_name(card->pdev));
 		else {
 			struct sk_buff *skb = card->rx_skbs[card->rx_in];
-			port_t *port = &card->ports[desc->stat &
+			struct port *port = &card->ports[desc->stat &
 						    PACKET_PORT_MASK];
 			struct net_device *dev = port->dev;
 
@@ -245,7 +245,7 @@
 
 static irqreturn_t wanxl_intr(int irq, void* dev_id)
 {
-        card_t *card = dev_id;
+	struct card *card = dev_id;
         int i;
         u32 stat;
         int handled = 0;
@@ -272,7 +272,7 @@
 
 static netdev_tx_t wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-        port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 	desc_t *desc;
 
         spin_lock(&port->lock);
@@ -319,7 +319,7 @@
 static int wanxl_attach(struct net_device *dev, unsigned short encoding,
 			unsigned short parity)
 {
-	port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 
 	if (encoding != ENCODING_NRZ &&
 	    encoding != ENCODING_NRZI)
@@ -343,7 +343,7 @@
 {
 	const size_t size = sizeof(sync_serial_settings);
 	sync_serial_settings line;
-	port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 
 	if (cmd != SIOCWANDEV)
 		return hdlc_ioctl(dev, ifr, cmd);
@@ -393,7 +393,7 @@
 
 static int wanxl_open(struct net_device *dev)
 {
-	port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 	u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
 	unsigned long timeout;
 	int i;
@@ -429,7 +429,7 @@
 
 static int wanxl_close(struct net_device *dev)
 {
-	port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 	unsigned long timeout;
 	int i;
 
@@ -467,7 +467,7 @@
 
 static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
 {
-	port_t *port = dev_to_port(dev);
+	struct port *port = dev_to_port(dev);
 
 	dev->stats.rx_over_errors = get_status(port)->rx_overruns;
 	dev->stats.rx_frame_errors = get_status(port)->rx_frame_errors;
@@ -478,7 +478,7 @@
 
 
 
-static int wanxl_puts_command(card_t *card, u32 cmd)
+static int wanxl_puts_command(struct card *card, u32 cmd)
 {
 	unsigned long timeout = jiffies + 5 * HZ;
 
@@ -495,7 +495,7 @@
 
 
 
-static void wanxl_reset(card_t *card)
+static void wanxl_reset(struct card *card)
 {
 	u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
 
@@ -511,7 +511,7 @@
 
 static void wanxl_pci_remove_one(struct pci_dev *pdev)
 {
-	card_t *card = pci_get_drvdata(pdev);
+	struct card *card = pci_get_drvdata(pdev);
 	int i;
 
 	for (i = 0; i < card->n_ports; i++) {
@@ -537,7 +537,7 @@
 		iounmap(card->plx);
 
 	if (card->status)
-		pci_free_consistent(pdev, sizeof(card_status_t),
+		pci_free_consistent(pdev, sizeof(struct card_status),
 				    card->status, card->status_address);
 
 	pci_release_regions(pdev);
@@ -560,7 +560,7 @@
 static int wanxl_pci_init_one(struct pci_dev *pdev,
 			      const struct pci_device_id *ent)
 {
-	card_t *card;
+	struct card *card;
 	u32 ramsize, stat;
 	unsigned long timeout;
 	u32 plx_phy;		/* PLX PCI base address */
@@ -601,7 +601,7 @@
 	default: ports = 4;
 	}
 
-	alloc_size = sizeof(card_t) + ports * sizeof(port_t);
+	alloc_size = sizeof(struct card) + ports * sizeof(struct port);
 	card = kzalloc(alloc_size, GFP_KERNEL);
 	if (card == NULL) {
 		pci_release_regions(pdev);
@@ -612,7 +612,8 @@
 	pci_set_drvdata(pdev, card);
 	card->pdev = pdev;
 
-	card->status = pci_alloc_consistent(pdev, sizeof(card_status_t),
+	card->status = pci_alloc_consistent(pdev,
+					    sizeof(struct card_status),
 					    &card->status_address);
 	if (card->status == NULL) {
 		wanxl_pci_remove_one(pdev);
@@ -766,7 +767,7 @@
 
 	for (i = 0; i < ports; i++) {
 		hdlc_device *hdlc;
-		port_t *port = &card->ports[i];
+		struct port *port = &card->ports[i];
 		struct net_device *dev = alloc_hdlcdev(port);
 		if (!dev) {
 			pr_err("%s: unable to allocate memory\n",
diff --git a/drivers/net/wireless/airo_cs.c b/drivers/net/wireless/airo_cs.c
index 7e9ede6..d9ed22b 100644
--- a/drivers/net/wireless/airo_cs.c
+++ b/drivers/net/wireless/airo_cs.c
@@ -56,18 +56,18 @@
 
 static void airo_detach(struct pcmcia_device *p_dev);
 
-typedef struct local_info_t {
+struct local_info {
 	struct net_device *eth_dev;
-} local_info_t;
+};
 
 static int airo_probe(struct pcmcia_device *p_dev)
 {
-	local_info_t *local;
+	struct local_info *local;
 
 	dev_dbg(&p_dev->dev, "airo_attach()\n");
 
 	/* Allocate space for private device-specific data */
-	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
+	local = kzalloc(sizeof(*local), GFP_KERNEL);
 	if (!local)
 		return -ENOMEM;
 
@@ -82,10 +82,11 @@
 
 	airo_release(link);
 
-	if (((local_info_t *)link->priv)->eth_dev) {
-		stop_airo_card(((local_info_t *)link->priv)->eth_dev, 0);
+	if (((struct local_info *)link->priv)->eth_dev) {
+		stop_airo_card(((struct local_info *)link->priv)->eth_dev,
+			       0);
 	}
-	((local_info_t *)link->priv)->eth_dev = NULL;
+	((struct local_info *)link->priv)->eth_dev = NULL;
 
 	kfree(link->priv);
 } /* airo_detach */
@@ -101,7 +102,7 @@
 
 static int airo_config(struct pcmcia_device *link)
 {
-	local_info_t *dev;
+	struct local_info *dev;
 	int ret;
 
 	dev = link->priv;
@@ -121,10 +122,10 @@
 	ret = pcmcia_enable_device(link);
 	if (ret)
 		goto failed;
-	((local_info_t *)link->priv)->eth_dev =
+	((struct local_info *)link->priv)->eth_dev =
 		init_airo_card(link->irq,
 			       link->resource[0]->start, 1, &link->dev);
-	if (!((local_info_t *)link->priv)->eth_dev)
+	if (!((struct local_info *)link->priv)->eth_dev)
 		goto failed;
 
 	return 0;
@@ -142,7 +143,7 @@
 
 static int airo_suspend(struct pcmcia_device *link)
 {
-	local_info_t *local = link->priv;
+	struct local_info *local = link->priv;
 
 	netif_device_detach(local->eth_dev);
 
@@ -151,7 +152,7 @@
 
 static int airo_resume(struct pcmcia_device *link)
 {
-	local_info_t *local = link->priv;
+	struct local_info *local = link->priv;
 
 	if (link->open) {
 		reset_airo_card(local->eth_dev);
diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h
index 8596aba..237d0cd 100644
--- a/drivers/net/wireless/ath/carl9170/carl9170.h
+++ b/drivers/net/wireless/ath/carl9170/carl9170.h
@@ -256,6 +256,7 @@
 	atomic_t rx_work_urbs;
 	atomic_t rx_pool_urbs;
 	kernel_ulong_t features;
+	bool usb_ep_cmd_is_bulk;
 
 	/* firmware settings */
 	struct completion fw_load_wait;
diff --git a/drivers/net/wireless/ath/carl9170/usb.c b/drivers/net/wireless/ath/carl9170/usb.c
index f35c7f3..c9f9331 100644
--- a/drivers/net/wireless/ath/carl9170/usb.c
+++ b/drivers/net/wireless/ath/carl9170/usb.c
@@ -621,9 +621,16 @@
 		goto err_free;
 	}
 
-	usb_fill_int_urb(urb, ar->udev, usb_sndintpipe(ar->udev,
-		AR9170_USB_EP_CMD), cmd, cmd->hdr.len + 4,
-		carl9170_usb_cmd_complete, ar, 1);
+	if (ar->usb_ep_cmd_is_bulk)
+		usb_fill_bulk_urb(urb, ar->udev,
+				  usb_sndbulkpipe(ar->udev, AR9170_USB_EP_CMD),
+				  cmd, cmd->hdr.len + 4,
+				  carl9170_usb_cmd_complete, ar);
+	else
+		usb_fill_int_urb(urb, ar->udev,
+				 usb_sndintpipe(ar->udev, AR9170_USB_EP_CMD),
+				 cmd, cmd->hdr.len + 4,
+				 carl9170_usb_cmd_complete, ar, 1);
 
 	if (free_buf)
 		urb->transfer_flags |= URB_FREE_BUFFER;
@@ -1032,9 +1039,10 @@
 static int carl9170_usb_probe(struct usb_interface *intf,
 			      const struct usb_device_id *id)
 {
+	struct usb_endpoint_descriptor *ep;
 	struct ar9170 *ar;
 	struct usb_device *udev;
-	int err;
+	int i, err;
 
 	err = usb_reset_device(interface_to_usbdev(intf));
 	if (err)
@@ -1050,6 +1058,21 @@
 	ar->intf = intf;
 	ar->features = id->driver_info;
 
+	/* We need to remember the type of endpoint 4 because it differs
+	 * between high- and full-speed configuration. The high-speed
+	 * configuration specifies it as interrupt and the full-speed
+	 * configuration as bulk endpoint. This information is required
+	 * later when sending urbs to that endpoint.
+	 */
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; ++i) {
+		ep = &intf->cur_altsetting->endpoint[i].desc;
+
+		if (usb_endpoint_num(ep) == AR9170_USB_EP_CMD &&
+		    usb_endpoint_dir_out(ep) &&
+		    usb_endpoint_type(ep) == USB_ENDPOINT_XFER_BULK)
+			ar->usb_ep_cmd_is_bulk = true;
+	}
+
 	usb_set_intfdata(intf, ar);
 	SET_IEEE80211_DEV(ar->hw, &intf->dev);
 
diff --git a/drivers/net/wireless/atmel.c b/drivers/net/wireless/atmel.c
index 1fe41af..9183f1c 100644
--- a/drivers/net/wireless/atmel.c
+++ b/drivers/net/wireless/atmel.c
@@ -2598,11 +2598,11 @@
 	NULL,				/* SIOCIWFIRSTPRIV */
 };
 
-typedef struct atmel_priv_ioctl {
+struct atmel_priv_ioctl {
 	char id[32];
 	unsigned char __user *data;
 	unsigned short len;
-} atmel_priv_ioctl;
+};
 
 #define ATMELFWL	SIOCIWFIRSTPRIV
 #define ATMELIDIFC	ATMELFWL + 1
@@ -2615,7 +2615,7 @@
 		.cmd = ATMELFWL,
 		.set_args = IW_PRIV_TYPE_BYTE
 				| IW_PRIV_SIZE_FIXED
-				| sizeof (atmel_priv_ioctl),
+				| sizeof(struct atmel_priv_ioctl),
 		.get_args = IW_PRIV_TYPE_NONE,
 		.name = "atmelfwl"
 	}, {
@@ -2645,7 +2645,7 @@
 {
 	int i, rc = 0;
 	struct atmel_private *priv = netdev_priv(dev);
-	atmel_priv_ioctl com;
+	struct atmel_priv_ioctl com;
 	struct iwreq *wrq = (struct iwreq *) rq;
 	unsigned char *new_firmware;
 	char domain[REGDOMAINSZ + 1];
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
index 535c7eb..8f8b937 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
@@ -1318,6 +1318,8 @@
 	msgbuf->nrof_flowrings = if_msgbuf->nrof_flowrings;
 	msgbuf->flowring_dma_handle = kzalloc(msgbuf->nrof_flowrings *
 		sizeof(*msgbuf->flowring_dma_handle), GFP_ATOMIC);
+	if (!msgbuf->flowring_dma_handle)
+		goto fail;
 
 	msgbuf->rx_dataoffset = if_msgbuf->rx_dataoffset;
 	msgbuf->max_rxbufpost = if_msgbuf->max_rxbufpost;
@@ -1362,6 +1364,7 @@
 		kfree(msgbuf->flow_map);
 		kfree(msgbuf->txstatus_done_map);
 		brcmf_msgbuf_release_pktids(msgbuf);
+		kfree(msgbuf->flowring_dma_handle);
 		if (msgbuf->ioctbuf)
 			dma_free_coherent(drvr->bus_if->dev,
 					  BRCMF_TX_IOCTL_MAX_MSG_SIZE,
@@ -1391,6 +1394,7 @@
 				  BRCMF_TX_IOCTL_MAX_MSG_SIZE,
 				  msgbuf->ioctbuf, msgbuf->ioctbuf_handle);
 		brcmf_msgbuf_release_pktids(msgbuf);
+		kfree(msgbuf->flowring_dma_handle);
 		kfree(msgbuf);
 		drvr->proto->pd = NULL;
 	}
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/brcm80211/brcmfmac/pcie.c
index bc972c0..e5101b2 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/pcie.c
@@ -591,12 +591,13 @@
 	}
 	if (dtoh_mb_data & BRCMF_D2H_DEV_DS_EXIT_NOTE)
 		brcmf_dbg(PCIE, "D2H_MB_DATA: DEEP SLEEP EXIT\n");
-	if (dtoh_mb_data & BRCMF_D2H_DEV_D3_ACK)
+	if (dtoh_mb_data & BRCMF_D2H_DEV_D3_ACK) {
 		brcmf_dbg(PCIE, "D2H_MB_DATA: D3 ACK\n");
 		if (waitqueue_active(&devinfo->mbdata_resp_wait)) {
 			devinfo->mbdata_completed = true;
 			wake_up(&devinfo->mbdata_resp_wait);
 		}
+	}
 }
 
 
diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c
index 800b62b..a42f9c3 100644
--- a/drivers/net/wireless/ipw2x00/ipw2200.c
+++ b/drivers/net/wireless/ipw2x00/ipw2200.c
@@ -9853,6 +9853,7 @@
 		strncpy(extra, "unknown", MAX_WX_STRING);
 		break;
 	}
+	extra[MAX_WX_STRING - 1] = '\0';
 
 	IPW_DEBUG_WX("PRIV GET MODE: %s\n", extra);
 
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 0d6a8b7..7c87965 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -396,7 +396,8 @@
 	else
 		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 
-	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+	/* TODO: enable that only for firmwares that don't crash */
+	/* hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; */
 	hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 	hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 	/* we create the 802.11 header and zero length SSID IE. */
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index ef3026f..d4eb8d2 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -165,6 +165,7 @@
 	u16 dealloc_ring[MAX_PENDING_REQS];
 	struct task_struct *dealloc_task;
 	wait_queue_head_t dealloc_wq;
+	atomic_t inflight_packets;
 
 	/* Use kthread for guest RX */
 	struct task_struct *task;
@@ -329,4 +330,8 @@
 extern struct dentry *xen_netback_dbg_root;
 #endif
 
+void xenvif_skb_zerocopy_prepare(struct xenvif_queue *queue,
+				 struct sk_buff *skb);
+void xenvif_skb_zerocopy_complete(struct xenvif_queue *queue);
+
 #endif /* __XEN_NETBACK__COMMON_H__ */
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index 48a55cd..e29e15d 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -43,6 +43,23 @@
 #define XENVIF_QUEUE_LENGTH 32
 #define XENVIF_NAPI_WEIGHT  64
 
+/* This function is used to set SKBTX_DEV_ZEROCOPY as well as
+ * increasing the inflight counter. We need to increase the inflight
+ * counter because core driver calls into xenvif_zerocopy_callback
+ * which calls xenvif_skb_zerocopy_complete.
+ */
+void xenvif_skb_zerocopy_prepare(struct xenvif_queue *queue,
+				 struct sk_buff *skb)
+{
+	skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+	atomic_inc(&queue->inflight_packets);
+}
+
+void xenvif_skb_zerocopy_complete(struct xenvif_queue *queue)
+{
+	atomic_dec(&queue->inflight_packets);
+}
+
 static inline void xenvif_stop_queue(struct xenvif_queue *queue)
 {
 	struct net_device *dev = queue->vif->dev;
@@ -78,12 +95,8 @@
 	/* This vif is rogue, we pretend we've there is nothing to do
 	 * for this vif to deschedule it from NAPI. But this interface
 	 * will be turned off in thread context later.
-	 * Also, if a guest doesn't post enough slots to receive data on one of
-	 * its queues, the carrier goes down and NAPI is descheduled here so
-	 * the guest can't send more packets until it's ready to receive.
 	 */
-	if (unlikely(queue->vif->disabled ||
-		     !netif_carrier_ok(queue->vif->dev))) {
+	if (unlikely(queue->vif->disabled)) {
 		napi_complete(napi);
 		return 0;
 	}
@@ -528,9 +541,6 @@
 
 	init_timer(&queue->rx_stalled);
 
-	netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll,
-			XENVIF_NAPI_WEIGHT);
-
 	return 0;
 }
 
@@ -564,6 +574,7 @@
 
 	init_waitqueue_head(&queue->wq);
 	init_waitqueue_head(&queue->dealloc_wq);
+	atomic_set(&queue->inflight_packets, 0);
 
 	if (tx_evtchn == rx_evtchn) {
 		/* feature-split-event-channels == 0 */
@@ -618,6 +629,9 @@
 	wake_up_process(queue->task);
 	wake_up_process(queue->dealloc_task);
 
+	netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll,
+			XENVIF_NAPI_WEIGHT);
+
 	return 0;
 
 err_rx_unbind:
@@ -646,25 +660,6 @@
 	rtnl_unlock();
 }
 
-static void xenvif_wait_unmap_timeout(struct xenvif_queue *queue,
-				      unsigned int worst_case_skb_lifetime)
-{
-	int i, unmap_timeout = 0;
-
-	for (i = 0; i < MAX_PENDING_REQS; ++i) {
-		if (queue->grant_tx_handle[i] != NETBACK_INVALID_HANDLE) {
-			unmap_timeout++;
-			schedule_timeout(msecs_to_jiffies(1000));
-			if (unmap_timeout > worst_case_skb_lifetime &&
-			    net_ratelimit())
-				netdev_err(queue->vif->dev,
-					   "Page still granted! Index: %x\n",
-					   i);
-			i = -1;
-		}
-	}
-}
-
 void xenvif_disconnect(struct xenvif *vif)
 {
 	struct xenvif_queue *queue = NULL;
@@ -676,6 +671,8 @@
 	for (queue_index = 0; queue_index < num_queues; ++queue_index) {
 		queue = &vif->queues[queue_index];
 
+		netif_napi_del(&queue->napi);
+
 		if (queue->task) {
 			del_timer_sync(&queue->rx_stalled);
 			kthread_stop(queue->task);
@@ -708,7 +705,6 @@
 void xenvif_deinit_queue(struct xenvif_queue *queue)
 {
 	free_xenballooned_pages(MAX_PENDING_REQS, queue->mmap_pages);
-	netif_napi_del(&queue->napi);
 }
 
 void xenvif_free(struct xenvif *vif)
@@ -716,21 +712,11 @@
 	struct xenvif_queue *queue = NULL;
 	unsigned int num_queues = vif->num_queues;
 	unsigned int queue_index;
-	/* Here we want to avoid timeout messages if an skb can be legitimately
-	 * stuck somewhere else. Realistically this could be an another vif's
-	 * internal or QDisc queue. That another vif also has this
-	 * rx_drain_timeout_msecs timeout, so give it time to drain out.
-	 * Although if that other guest wakes up just before its timeout happens
-	 * and takes only one skb from QDisc, it can hold onto other skbs for a
-	 * longer period.
-	 */
-	unsigned int worst_case_skb_lifetime = (rx_drain_timeout_msecs/1000);
 
 	unregister_netdev(vif->dev);
 
 	for (queue_index = 0; queue_index < num_queues; ++queue_index) {
 		queue = &vif->queues[queue_index];
-		xenvif_wait_unmap_timeout(queue, worst_case_skb_lifetime);
 		xenvif_deinit_queue(queue);
 	}
 
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index aa20933..08f6599 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1525,10 +1525,12 @@
 	/* remove traces of mapped pages and frag_list */
 	skb_frag_list_init(skb);
 	uarg = skb_shinfo(skb)->destructor_arg;
+	/* increase inflight counter to offset decrement in callback */
+	atomic_inc(&queue->inflight_packets);
 	uarg->callback(uarg, true);
 	skb_shinfo(skb)->destructor_arg = NULL;
 
-	skb_shinfo(nskb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+	xenvif_skb_zerocopy_prepare(queue, nskb);
 	kfree_skb(nskb);
 
 	return 0;
@@ -1589,7 +1591,7 @@
 				if (net_ratelimit())
 					netdev_err(queue->vif->dev,
 						   "Not enough memory to consolidate frag_list!\n");
-				skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+				xenvif_skb_zerocopy_prepare(queue, skb);
 				kfree_skb(skb);
 				continue;
 			}
@@ -1609,7 +1611,7 @@
 				   "Can't setup checksum in net_tx_action\n");
 			/* We have to set this flag to trigger the callback */
 			if (skb_shinfo(skb)->destructor_arg)
-				skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+				xenvif_skb_zerocopy_prepare(queue, skb);
 			kfree_skb(skb);
 			continue;
 		}
@@ -1641,7 +1643,7 @@
 		 * skb. E.g. the __pskb_pull_tail earlier can do such thing.
 		 */
 		if (skb_shinfo(skb)->destructor_arg) {
-			skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+			xenvif_skb_zerocopy_prepare(queue, skb);
 			queue->stats.tx_zerocopy_sent++;
 		}
 
@@ -1681,6 +1683,7 @@
 		queue->stats.tx_zerocopy_success++;
 	else
 		queue->stats.tx_zerocopy_fail++;
+	xenvif_skb_zerocopy_complete(queue);
 }
 
 static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)
@@ -2025,9 +2028,15 @@
 		 * context so we defer it here, if this thread is
 		 * associated with queue 0.
 		 */
-		if (unlikely(queue->vif->disabled && queue->id == 0))
+		if (unlikely(queue->vif->disabled && queue->id == 0)) {
 			xenvif_carrier_off(queue->vif);
-		else if (unlikely(test_and_clear_bit(QUEUE_STATUS_RX_PURGE_EVENT,
+		} else if (unlikely(queue->vif->disabled)) {
+			/* kthread_stop() would be called upon this thread soon,
+			 * be a bit proactive
+			 */
+			skb_queue_purge(&queue->rx_queue);
+			queue->rx_last_skb_slots = 0;
+		} else if (unlikely(test_and_clear_bit(QUEUE_STATUS_RX_PURGE_EVENT,
 						     &queue->status))) {
 			xenvif_rx_purge_event(queue);
 		} else if (!netif_carrier_ok(queue->vif->dev)) {
@@ -2052,15 +2061,24 @@
 	return 0;
 }
 
+static bool xenvif_dealloc_kthread_should_stop(struct xenvif_queue *queue)
+{
+	/* Dealloc thread must remain running until all inflight
+	 * packets complete.
+	 */
+	return kthread_should_stop() &&
+		!atomic_read(&queue->inflight_packets);
+}
+
 int xenvif_dealloc_kthread(void *data)
 {
 	struct xenvif_queue *queue = data;
 
-	while (!kthread_should_stop()) {
+	for (;;) {
 		wait_event_interruptible(queue->dealloc_wq,
 					 tx_dealloc_work_todo(queue) ||
-					 kthread_should_stop());
-		if (kthread_should_stop())
+					 xenvif_dealloc_kthread_should_stop(queue));
+		if (xenvif_dealloc_kthread_should_stop(queue))
 			break;
 
 		xenvif_tx_dealloc_action(queue);
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 580517d..9c47b89 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -116,6 +116,7 @@
 }
 
 #define XENVIF_KICK_STR "kick"
+#define BUFFER_SIZE     32
 
 static ssize_t
 xenvif_write_io_ring(struct file *filp, const char __user *buf, size_t count,
@@ -124,22 +125,24 @@
 	struct xenvif_queue *queue =
 		((struct seq_file *)filp->private_data)->private;
 	int len;
-	char write[sizeof(XENVIF_KICK_STR)];
+	char write[BUFFER_SIZE];
 
 	/* don't allow partial writes and check the length */
 	if (*ppos != 0)
 		return 0;
-	if (count < sizeof(XENVIF_KICK_STR) - 1)
+	if (count >= sizeof(write))
 		return -ENOSPC;
 
 	len = simple_write_to_buffer(write,
-				     sizeof(write),
+				     sizeof(write) - 1,
 				     ppos,
 				     buf,
 				     count);
 	if (len < 0)
 		return len;
 
+	write[len] = '\0';
+
 	if (!strncmp(write, XENVIF_KICK_STR, sizeof(XENVIF_KICK_STR) - 1))
 		xenvif_interrupt(0, (void *)queue);
 	else {
@@ -171,10 +174,9 @@
 	.write = xenvif_write_io_ring,
 };
 
-static void xenvif_debugfs_addif(struct xenvif_queue *queue)
+static void xenvif_debugfs_addif(struct xenvif *vif)
 {
 	struct dentry *pfile;
-	struct xenvif *vif = queue->vif;
 	int i;
 
 	if (IS_ERR_OR_NULL(xen_netback_dbg_root))
@@ -733,11 +735,12 @@
 			be->vif->num_queues = queue_index;
 			goto err;
 		}
-#ifdef CONFIG_DEBUG_FS
-		xenvif_debugfs_addif(queue);
-#endif /* CONFIG_DEBUG_FS */
 	}
 
+#ifdef CONFIG_DEBUG_FS
+	xenvif_debugfs_addif(be->vif);
+#endif /* CONFIG_DEBUG_FS */
+
 	/* Initialisation completed, tell core driver the number of
 	 * active queues.
 	 */
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 28204bc..ca82f54 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -628,9 +628,10 @@
 	slots = DIV_ROUND_UP(offset + len, PAGE_SIZE) +
 		xennet_count_skb_frag_slots(skb);
 	if (unlikely(slots > MAX_SKB_FRAGS + 1)) {
-		net_alert_ratelimited(
-			"xennet: skb rides the rocket: %d slots\n", slots);
-		goto drop;
+		net_dbg_ratelimited("xennet: skb rides the rocket: %d slots, %d bytes\n",
+				    slots, skb->len);
+		if (skb_linearize(skb))
+			goto drop;
 	}
 
 	spin_lock_irqsave(&queue->tx_lock, flags);
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 2dcb054..5160c4e 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -9,7 +9,8 @@
 
 config OF_SELFTEST
 	bool "Device Tree Runtime self tests"
-	depends on OF_IRQ
+	depends on OF_IRQ && OF_EARLY_FLATTREE
+	select OF_DYNAMIC
 	help
 	  This option builds in test cases for the device tree infrastructure
 	  that are executed once at boot time, and the results dumped to the
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 099b1fb..2b6a7b1 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,11 +1,13 @@
 obj-y = base.o device.o platform.o
+obj-$(CONFIG_OF_DYNAMIC) += dynamic.o
 obj-$(CONFIG_OF_FLATTREE) += fdt.o
 obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o
 obj-$(CONFIG_OF_PROMTREE) += pdt.o
 obj-$(CONFIG_OF_ADDRESS)  += address.o
 obj-$(CONFIG_OF_IRQ)    += irq.o
 obj-$(CONFIG_OF_NET)	+= of_net.o
-obj-$(CONFIG_OF_SELFTEST) += selftest.o
+obj-$(CONFIG_OF_SELFTEST) += of_selftest.o
+of_selftest-objs := selftest.o testcase-data/testcases.dtb.o
 obj-$(CONFIG_OF_MDIO)	+= of_mdio.o
 obj-$(CONFIG_OF_PCI)	+= of_pci.o
 obj-$(CONFIG_OF_PCI_IRQ)  += of_pci_irq.o
diff --git a/drivers/of/base.c b/drivers/of/base.c
index b986480..d8574ad 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,6 +17,7 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  */
+#include <linux/console.h>
 #include <linux/ctype.h>
 #include <linux/cpu.h>
 #include <linux/module.h>
@@ -35,15 +36,17 @@
 EXPORT_SYMBOL(of_allnodes);
 struct device_node *of_chosen;
 struct device_node *of_aliases;
-static struct device_node *of_stdout;
+struct device_node *of_stdout;
 
-static struct kset *of_kset;
+struct kset *of_kset;
 
 /*
- * Used to protect the of_aliases; but also overloaded to hold off addition of
- * nodes to sysfs
+ * Used to protect the of_aliases, to hold off addition of nodes to sysfs.
+ * This mutex must be held whenever modifications are being made to the
+ * device tree. The of_{attach,detach}_node() and
+ * of_{add,remove,update}_property() helpers make sure this happens.
  */
-DEFINE_MUTEX(of_aliases_mutex);
+DEFINE_MUTEX(of_mutex);
 
 /* use when traversing tree through the allnext, child, sibling,
  * or parent members of struct device_node.
@@ -89,79 +92,7 @@
 }
 #endif
 
-#if defined(CONFIG_OF_DYNAMIC)
-/**
- *	of_node_get - Increment refcount of a node
- *	@node:	Node to inc refcount, NULL is supported to
- *		simplify writing of callers
- *
- *	Returns node.
- */
-struct device_node *of_node_get(struct device_node *node)
-{
-	if (node)
-		kobject_get(&node->kobj);
-	return node;
-}
-EXPORT_SYMBOL(of_node_get);
-
-static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
-{
-	return container_of(kobj, struct device_node, kobj);
-}
-
-/**
- *	of_node_release - release a dynamically allocated node
- *	@kref:  kref element of the node to be released
- *
- *	In of_node_put() this function is passed to kref_put()
- *	as the destructor.
- */
-static void of_node_release(struct kobject *kobj)
-{
-	struct device_node *node = kobj_to_device_node(kobj);
-	struct property *prop = node->properties;
-
-	/* We should never be releasing nodes that haven't been detached. */
-	if (!of_node_check_flag(node, OF_DETACHED)) {
-		pr_err("ERROR: Bad of_node_put() on %s\n", node->full_name);
-		dump_stack();
-		return;
-	}
-
-	if (!of_node_check_flag(node, OF_DYNAMIC))
-		return;
-
-	while (prop) {
-		struct property *next = prop->next;
-		kfree(prop->name);
-		kfree(prop->value);
-		kfree(prop);
-		prop = next;
-
-		if (!prop) {
-			prop = node->deadprops;
-			node->deadprops = NULL;
-		}
-	}
-	kfree(node->full_name);
-	kfree(node->data);
-	kfree(node);
-}
-
-/**
- *	of_node_put - Decrement refcount of a node
- *	@node:	Node to dec refcount, NULL is supported to
- *		simplify writing of callers
- *
- */
-void of_node_put(struct device_node *node)
-{
-	if (node)
-		kobject_put(&node->kobj);
-}
-EXPORT_SYMBOL(of_node_put);
-#else
+#ifndef CONFIG_OF_DYNAMIC
 static void of_node_release(struct kobject *kobj)
 {
 	/* Without CONFIG_OF_DYNAMIC, no nodes gets freed */
@@ -200,13 +131,16 @@
 	return name;
 }
 
-static int __of_add_property_sysfs(struct device_node *np, struct property *pp)
+int __of_add_property_sysfs(struct device_node *np, struct property *pp)
 {
 	int rc;
 
 	/* Important: Don't leak passwords */
 	bool secure = strncmp(pp->name, "security-", 9) == 0;
 
+	if (!of_kset || !of_node_is_attached(np))
+		return 0;
+
 	sysfs_bin_attr_init(&pp->attr);
 	pp->attr.attr.name = safe_name(&np->kobj, pp->name);
 	pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO;
@@ -218,12 +152,15 @@
 	return rc;
 }
 
-static int __of_node_add(struct device_node *np)
+int __of_attach_node_sysfs(struct device_node *np)
 {
 	const char *name;
 	struct property *pp;
 	int rc;
 
+	if (!of_kset)
+		return 0;
+
 	np->kobj.kset = of_kset;
 	if (!np->parent) {
 		/* Nodes without parents are new top level trees */
@@ -245,59 +182,20 @@
 	return 0;
 }
 
-int of_node_add(struct device_node *np)
-{
-	int rc = 0;
-
-	BUG_ON(!of_node_is_initialized(np));
-
-	/*
-	 * Grab the mutex here so that in a race condition between of_init() and
-	 * of_node_add(), node addition will still be consistent.
-	 */
-	mutex_lock(&of_aliases_mutex);
-	if (of_kset)
-		rc = __of_node_add(np);
-	else
-		/* This scenario may be perfectly valid, but report it anyway */
-		pr_info("of_node_add(%s) before of_init()\n", np->full_name);
-	mutex_unlock(&of_aliases_mutex);
-	return rc;
-}
-
-#if defined(CONFIG_OF_DYNAMIC)
-static void of_node_remove(struct device_node *np)
-{
-	struct property *pp;
-
-	BUG_ON(!of_node_is_initialized(np));
-
-	/* only remove properties if on sysfs */
-	if (of_node_is_attached(np)) {
-		for_each_property_of_node(np, pp)
-			sysfs_remove_bin_file(&np->kobj, &pp->attr);
-		kobject_del(&np->kobj);
-	}
-
-	/* finally remove the kobj_init ref */
-	of_node_put(np);
-}
-#endif
-
 static int __init of_init(void)
 {
 	struct device_node *np;
 
 	/* Create the kset, and register existing nodes */
-	mutex_lock(&of_aliases_mutex);
+	mutex_lock(&of_mutex);
 	of_kset = kset_create_and_add("devicetree", NULL, firmware_kobj);
 	if (!of_kset) {
-		mutex_unlock(&of_aliases_mutex);
+		mutex_unlock(&of_mutex);
 		return -ENOMEM;
 	}
 	for_each_of_allnodes(np)
-		__of_node_add(np);
-	mutex_unlock(&of_aliases_mutex);
+		__of_attach_node_sysfs(np);
+	mutex_unlock(&of_mutex);
 
 	/* Symlink in /proc as required by userspace ABI */
 	if (of_allnodes)
@@ -369,8 +267,8 @@
  * Find a property with a given name for a given node
  * and return the value.
  */
-static const void *__of_get_property(const struct device_node *np,
-				     const char *name, int *lenp)
+const void *__of_get_property(const struct device_node *np,
+			      const char *name, int *lenp)
 {
 	struct property *pp = __of_find_property(np, name, lenp);
 
@@ -1748,32 +1646,10 @@
 }
 EXPORT_SYMBOL(of_count_phandle_with_args);
 
-#if defined(CONFIG_OF_DYNAMIC)
-static int of_property_notify(int action, struct device_node *np,
-			      struct property *prop)
-{
-	struct of_prop_reconfig pr;
-
-	/* only call notifiers if the node is attached */
-	if (!of_node_is_attached(np))
-		return 0;
-
-	pr.dn = np;
-	pr.prop = prop;
-	return of_reconfig_notify(action, &pr);
-}
-#else
-static int of_property_notify(int action, struct device_node *np,
-			      struct property *prop)
-{
-	return 0;
-}
-#endif
-
 /**
  * __of_add_property - Add a property to a node without lock operations
  */
-static int __of_add_property(struct device_node *np, struct property *prop)
+int __of_add_property(struct device_node *np, struct property *prop)
 {
 	struct property **next;
 
@@ -1799,22 +1675,49 @@
 	unsigned long flags;
 	int rc;
 
-	rc = of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop);
-	if (rc)
-		return rc;
+	mutex_lock(&of_mutex);
 
 	raw_spin_lock_irqsave(&devtree_lock, flags);
 	rc = __of_add_property(np, prop);
 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
-	if (rc)
-		return rc;
 
-	if (of_node_is_attached(np))
+	if (!rc)
 		__of_add_property_sysfs(np, prop);
 
+	mutex_unlock(&of_mutex);
+
+	if (!rc)
+		of_property_notify(OF_RECONFIG_ADD_PROPERTY, np, prop, NULL);
+
 	return rc;
 }
 
+int __of_remove_property(struct device_node *np, struct property *prop)
+{
+	struct property **next;
+
+	for (next = &np->properties; *next; next = &(*next)->next) {
+		if (*next == prop)
+			break;
+	}
+	if (*next == NULL)
+		return -ENODEV;
+
+	/* found the node */
+	*next = prop->next;
+	prop->next = np->deadprops;
+	np->deadprops = prop;
+
+	return 0;
+}
+
+void __of_remove_property_sysfs(struct device_node *np, struct property *prop)
+{
+	/* at early boot, bail here and defer setup to of_init() */
+	if (of_kset && of_node_is_attached(np))
+		sysfs_remove_bin_file(&np->kobj, &prop->attr);
+}
+
 /**
  * of_remove_property - Remove a property from a node.
  *
@@ -1825,42 +1728,64 @@
  */
 int of_remove_property(struct device_node *np, struct property *prop)
 {
-	struct property **next;
 	unsigned long flags;
-	int found = 0;
 	int rc;
 
-	rc = of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop);
-	if (rc)
-		return rc;
+	mutex_lock(&of_mutex);
 
 	raw_spin_lock_irqsave(&devtree_lock, flags);
-	next = &np->properties;
-	while (*next) {
-		if (*next == prop) {
-			/* found the node */
-			*next = prop->next;
-			prop->next = np->deadprops;
-			np->deadprops = prop;
-			found = 1;
-			break;
-		}
-		next = &(*next)->next;
-	}
+	rc = __of_remove_property(np, prop);
 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
 
-	if (!found)
-		return -ENODEV;
+	if (!rc)
+		__of_remove_property_sysfs(np, prop);
 
-	/* at early boot, bail hear and defer setup to of_init() */
-	if (!of_kset)
-		return 0;
+	mutex_unlock(&of_mutex);
 
-	sysfs_remove_bin_file(&np->kobj, &prop->attr);
+	if (!rc)
+		of_property_notify(OF_RECONFIG_REMOVE_PROPERTY, np, prop, NULL);
+
+	return rc;
+}
+
+int __of_update_property(struct device_node *np, struct property *newprop,
+		struct property **oldpropp)
+{
+	struct property **next, *oldprop;
+
+	for (next = &np->properties; *next; next = &(*next)->next) {
+		if (of_prop_cmp((*next)->name, newprop->name) == 0)
+			break;
+	}
+	*oldpropp = oldprop = *next;
+
+	if (oldprop) {
+		/* replace the node */
+		newprop->next = oldprop->next;
+		*next = newprop;
+		oldprop->next = np->deadprops;
+		np->deadprops = oldprop;
+	} else {
+		/* new node */
+		newprop->next = NULL;
+		*next = newprop;
+	}
 
 	return 0;
 }
 
+void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
+		struct property *oldprop)
+{
+	/* At early boot, bail out and defer setup to of_init() */
+	if (!of_kset)
+		return;
+
+	if (oldprop)
+		sysfs_remove_bin_file(&np->kobj, &oldprop->attr);
+	__of_add_property_sysfs(np, newprop);
+}
+
 /*
  * of_update_property - Update a property in a node, if the property does
  * not exist, add it.
@@ -1872,164 +1797,29 @@
  */
 int of_update_property(struct device_node *np, struct property *newprop)
 {
-	struct property **next, *oldprop;
+	struct property *oldprop;
 	unsigned long flags;
 	int rc;
 
-	rc = of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop);
-	if (rc)
-		return rc;
-
 	if (!newprop->name)
 		return -EINVAL;
 
-	raw_spin_lock_irqsave(&devtree_lock, flags);
-	next = &np->properties;
-	oldprop = __of_find_property(np, newprop->name, NULL);
-	if (!oldprop) {
-		/* add the new node */
-		rc = __of_add_property(np, newprop);
-	} else while (*next) {
-		/* replace the node */
-		if (*next == oldprop) {
-			newprop->next = oldprop->next;
-			*next = newprop;
-			oldprop->next = np->deadprops;
-			np->deadprops = oldprop;
-			break;
-		}
-		next = &(*next)->next;
-	}
-	raw_spin_unlock_irqrestore(&devtree_lock, flags);
-	if (rc)
-		return rc;
-
-	/* At early boot, bail out and defer setup to of_init() */
-	if (!of_kset)
-		return 0;
-
-	/* Update the sysfs attribute */
-	if (oldprop)
-		sysfs_remove_bin_file(&np->kobj, &oldprop->attr);
-	__of_add_property_sysfs(np, newprop);
-
-	return 0;
-}
-
-#if defined(CONFIG_OF_DYNAMIC)
-/*
- * Support for dynamic device trees.
- *
- * On some platforms, the device tree can be manipulated at runtime.
- * The routines in this section support adding, removing and changing
- * device tree nodes.
- */
-
-static BLOCKING_NOTIFIER_HEAD(of_reconfig_chain);
-
-int of_reconfig_notifier_register(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_register(&of_reconfig_chain, nb);
-}
-EXPORT_SYMBOL_GPL(of_reconfig_notifier_register);
-
-int of_reconfig_notifier_unregister(struct notifier_block *nb)
-{
-	return blocking_notifier_chain_unregister(&of_reconfig_chain, nb);
-}
-EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
-
-int of_reconfig_notify(unsigned long action, void *p)
-{
-	int rc;
-
-	rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p);
-	return notifier_to_errno(rc);
-}
-
-/**
- * of_attach_node - Plug a device node into the tree and global list.
- */
-int of_attach_node(struct device_node *np)
-{
-	unsigned long flags;
-	int rc;
-
-	rc = of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np);
-	if (rc)
-		return rc;
+	mutex_lock(&of_mutex);
 
 	raw_spin_lock_irqsave(&devtree_lock, flags);
-	np->sibling = np->parent->child;
-	np->allnext = np->parent->allnext;
-	np->parent->allnext = np;
-	np->parent->child = np;
-	of_node_clear_flag(np, OF_DETACHED);
+	rc = __of_update_property(np, newprop, &oldprop);
 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
 
-	of_node_add(np);
-	return 0;
-}
+	if (!rc)
+		__of_update_property_sysfs(np, newprop, oldprop);
 
-/**
- * of_detach_node - "Unplug" a node from the device tree.
- *
- * The caller must hold a reference to the node.  The memory associated with
- * the node is not freed until its refcount goes to zero.
- */
-int of_detach_node(struct device_node *np)
-{
-	struct device_node *parent;
-	unsigned long flags;
-	int rc = 0;
+	mutex_unlock(&of_mutex);
 
-	rc = of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np);
-	if (rc)
-		return rc;
+	if (!rc)
+		of_property_notify(OF_RECONFIG_UPDATE_PROPERTY, np, newprop, oldprop);
 
-	raw_spin_lock_irqsave(&devtree_lock, flags);
-
-	if (of_node_check_flag(np, OF_DETACHED)) {
-		/* someone already detached it */
-		raw_spin_unlock_irqrestore(&devtree_lock, flags);
-		return rc;
-	}
-
-	parent = np->parent;
-	if (!parent) {
-		raw_spin_unlock_irqrestore(&devtree_lock, flags);
-		return rc;
-	}
-
-	if (of_allnodes == np)
-		of_allnodes = np->allnext;
-	else {
-		struct device_node *prev;
-		for (prev = of_allnodes;
-		     prev->allnext != np;
-		     prev = prev->allnext)
-			;
-		prev->allnext = np->allnext;
-	}
-
-	if (parent->child == np)
-		parent->child = np->sibling;
-	else {
-		struct device_node *prevsib;
-		for (prevsib = np->parent->child;
-		     prevsib->sibling != np;
-		     prevsib = prevsib->sibling)
-			;
-		prevsib->sibling = np->sibling;
-	}
-
-	of_node_set_flag(np, OF_DETACHED);
-	raw_spin_unlock_irqrestore(&devtree_lock, flags);
-
-	of_node_remove(np);
 	return rc;
 }
-#endif /* defined(CONFIG_OF_DYNAMIC) */
 
 static void of_alias_add(struct alias_prop *ap, struct device_node *np,
 			 int id, const char *stem, int stem_len)
@@ -2062,9 +1852,12 @@
 		of_chosen = of_find_node_by_path("/chosen@0");
 
 	if (of_chosen) {
+		/* linux,stdout-path and /aliases/stdout are for legacy compatibility */
 		const char *name = of_get_property(of_chosen, "stdout-path", NULL);
 		if (!name)
 			name = of_get_property(of_chosen, "linux,stdout-path", NULL);
+		if (IS_ENABLED(CONFIG_PPC) && !name)
+			name = of_get_property(of_aliases, "stdout", NULL);
 		if (name)
 			of_stdout = of_find_node_by_path(name);
 	}
@@ -2122,7 +1915,7 @@
 	struct alias_prop *app;
 	int id = -ENODEV;
 
-	mutex_lock(&of_aliases_mutex);
+	mutex_lock(&of_mutex);
 	list_for_each_entry(app, &aliases_lookup, link) {
 		if (strcmp(app->stem, stem) != 0)
 			continue;
@@ -2132,7 +1925,7 @@
 			break;
 		}
 	}
-	mutex_unlock(&of_aliases_mutex);
+	mutex_unlock(&of_mutex);
 
 	return id;
 }
@@ -2180,20 +1973,22 @@
 EXPORT_SYMBOL_GPL(of_prop_next_string);
 
 /**
- * of_device_is_stdout_path - check if a device node matches the
- *                            linux,stdout-path property
+ * of_console_check() - Test and setup console for DT setup
+ * @dn - Pointer to device node
+ * @name - Name to use for preferred console without index. ex. "ttyS"
+ * @index - Index to use for preferred console.
  *
- * Check if this device node matches the linux,stdout-path property
- * in the chosen node. return true if yes, false otherwise.
+ * Check if the given device node matches the stdout-path property in the
+ * /chosen node. If it does then register it as the preferred console and return
+ * TRUE. Otherwise return FALSE.
  */
-int of_device_is_stdout_path(struct device_node *dn)
+bool of_console_check(struct device_node *dn, char *name, int index)
 {
-	if (!of_stdout)
+	if (!dn || dn != of_stdout || console_set_on_cmdline)
 		return false;
-
-	return of_stdout == dn;
+	return add_preferred_console(name, index, NULL);
 }
-EXPORT_SYMBOL_GPL(of_device_is_stdout_path);
+EXPORT_SYMBOL_GPL(of_console_check);
 
 /**
  *	of_find_next_cache_node - Find a node's subsidiary cache
diff --git a/drivers/of/device.c b/drivers/of/device.c
index dafb973..46d6c75c 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -160,7 +160,7 @@
 	add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
 
 	seen = 0;
-	mutex_lock(&of_aliases_mutex);
+	mutex_lock(&of_mutex);
 	list_for_each_entry(app, &aliases_lookup, link) {
 		if (dev->of_node == app->np) {
 			add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
@@ -168,7 +168,7 @@
 			seen++;
 		}
 	}
-	mutex_unlock(&of_aliases_mutex);
+	mutex_unlock(&of_mutex);
 }
 
 int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
new file mode 100644
index 0000000..54fecc4
--- /dev/null
+++ b/drivers/of/dynamic.c
@@ -0,0 +1,660 @@
+/*
+ * Support for dynamic device trees.
+ *
+ * On some platforms, the device tree can be manipulated at runtime.
+ * The routines in this section support adding, removing and changing
+ * device tree nodes.
+ */
+
+#include <linux/of.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/proc_fs.h>
+
+#include "of_private.h"
+
+/**
+ * of_node_get() - Increment refcount of a node
+ * @node:	Node to inc refcount, NULL is supported to simplify writing of
+ *		callers
+ *
+ * Returns node.
+ */
+struct device_node *of_node_get(struct device_node *node)
+{
+	if (node)
+		kobject_get(&node->kobj);
+	return node;
+}
+EXPORT_SYMBOL(of_node_get);
+
+/**
+ * of_node_put() - Decrement refcount of a node
+ * @node:	Node to dec refcount, NULL is supported to simplify writing of
+ *		callers
+ */
+void of_node_put(struct device_node *node)
+{
+	if (node)
+		kobject_put(&node->kobj);
+}
+EXPORT_SYMBOL(of_node_put);
+
+void __of_detach_node_sysfs(struct device_node *np)
+{
+	struct property *pp;
+
+	BUG_ON(!of_node_is_initialized(np));
+	if (!of_kset)
+		return;
+
+	/* only remove properties if on sysfs */
+	if (of_node_is_attached(np)) {
+		for_each_property_of_node(np, pp)
+			sysfs_remove_bin_file(&np->kobj, &pp->attr);
+		kobject_del(&np->kobj);
+	}
+
+	/* finally remove the kobj_init ref */
+	of_node_put(np);
+}
+
+static BLOCKING_NOTIFIER_HEAD(of_reconfig_chain);
+
+int of_reconfig_notifier_register(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&of_reconfig_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_reconfig_notifier_register);
+
+int of_reconfig_notifier_unregister(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&of_reconfig_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
+
+int of_reconfig_notify(unsigned long action, void *p)
+{
+	int rc;
+
+	rc = blocking_notifier_call_chain(&of_reconfig_chain, action, p);
+	return notifier_to_errno(rc);
+}
+
+int of_property_notify(int action, struct device_node *np,
+		       struct property *prop, struct property *oldprop)
+{
+	struct of_prop_reconfig pr;
+
+	/* only call notifiers if the node is attached */
+	if (!of_node_is_attached(np))
+		return 0;
+
+	pr.dn = np;
+	pr.prop = prop;
+	pr.old_prop = oldprop;
+	return of_reconfig_notify(action, &pr);
+}
+
+void __of_attach_node(struct device_node *np)
+{
+	const __be32 *phandle;
+	int sz;
+
+	np->name = __of_get_property(np, "name", NULL) ? : "<NULL>";
+	np->type = __of_get_property(np, "device_type", NULL) ? : "<NULL>";
+
+	phandle = __of_get_property(np, "phandle", &sz);
+	if (!phandle)
+		phandle = __of_get_property(np, "linux,phandle", &sz);
+	if (IS_ENABLED(PPC_PSERIES) && !phandle)
+		phandle = __of_get_property(np, "ibm,phandle", &sz);
+	np->phandle = (phandle && (sz >= 4)) ? be32_to_cpup(phandle) : 0;
+
+	np->child = NULL;
+	np->sibling = np->parent->child;
+	np->allnext = np->parent->allnext;
+	np->parent->allnext = np;
+	np->parent->child = np;
+	of_node_clear_flag(np, OF_DETACHED);
+}
+
+/**
+ * of_attach_node() - Plug a device node into the tree and global list.
+ */
+int of_attach_node(struct device_node *np)
+{
+	unsigned long flags;
+
+	mutex_lock(&of_mutex);
+	raw_spin_lock_irqsave(&devtree_lock, flags);
+	__of_attach_node(np);
+	raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+	__of_attach_node_sysfs(np);
+	mutex_unlock(&of_mutex);
+
+	of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, np);
+
+	return 0;
+}
+
+void __of_detach_node(struct device_node *np)
+{
+	struct device_node *parent;
+
+	if (WARN_ON(of_node_check_flag(np, OF_DETACHED)))
+		return;
+
+	parent = np->parent;
+	if (WARN_ON(!parent))
+		return;
+
+	if (of_allnodes == np)
+		of_allnodes = np->allnext;
+	else {
+		struct device_node *prev;
+		for (prev = of_allnodes;
+		     prev->allnext != np;
+		     prev = prev->allnext)
+			;
+		prev->allnext = np->allnext;
+	}
+
+	if (parent->child == np)
+		parent->child = np->sibling;
+	else {
+		struct device_node *prevsib;
+		for (prevsib = np->parent->child;
+		     prevsib->sibling != np;
+		     prevsib = prevsib->sibling)
+			;
+		prevsib->sibling = np->sibling;
+	}
+
+	of_node_set_flag(np, OF_DETACHED);
+}
+
+/**
+ * of_detach_node() - "Unplug" a node from the device tree.
+ *
+ * The caller must hold a reference to the node.  The memory associated with
+ * the node is not freed until its refcount goes to zero.
+ */
+int of_detach_node(struct device_node *np)
+{
+	unsigned long flags;
+	int rc = 0;
+
+	mutex_lock(&of_mutex);
+	raw_spin_lock_irqsave(&devtree_lock, flags);
+	__of_detach_node(np);
+	raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+	__of_detach_node_sysfs(np);
+	mutex_unlock(&of_mutex);
+
+	of_reconfig_notify(OF_RECONFIG_DETACH_NODE, np);
+
+	return rc;
+}
+
+/**
+ * of_node_release() - release a dynamically allocated node
+ * @kref: kref element of the node to be released
+ *
+ * In of_node_put() this function is passed to kref_put() as the destructor.
+ */
+void of_node_release(struct kobject *kobj)
+{
+	struct device_node *node = kobj_to_device_node(kobj);
+	struct property *prop = node->properties;
+
+	/* We should never be releasing nodes that haven't been detached. */
+	if (!of_node_check_flag(node, OF_DETACHED)) {
+		pr_err("ERROR: Bad of_node_put() on %s\n", node->full_name);
+		dump_stack();
+		return;
+	}
+
+	if (!of_node_check_flag(node, OF_DYNAMIC))
+		return;
+
+	while (prop) {
+		struct property *next = prop->next;
+		kfree(prop->name);
+		kfree(prop->value);
+		kfree(prop);
+		prop = next;
+
+		if (!prop) {
+			prop = node->deadprops;
+			node->deadprops = NULL;
+		}
+	}
+	kfree(node->full_name);
+	kfree(node->data);
+	kfree(node);
+}
+
+/**
+ * __of_prop_dup - Copy a property dynamically.
+ * @prop:	Property to copy
+ * @allocflags:	Allocation flags (typically pass GFP_KERNEL)
+ *
+ * Copy a property by dynamically allocating the memory of both the
+ * property stucture and the property name & contents. The property's
+ * flags have the OF_DYNAMIC bit set so that we can differentiate between
+ * dynamically allocated properties and not.
+ * Returns the newly allocated property or NULL on out of memory error.
+ */
+struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
+{
+	struct property *new;
+
+	new = kzalloc(sizeof(*new), allocflags);
+	if (!new)
+		return NULL;
+
+	/*
+	 * NOTE: There is no check for zero length value.
+	 * In case of a boolean property, this will allocate a value
+	 * of zero bytes. We do this to work around the use
+	 * of of_get_property() calls on boolean values.
+	 */
+	new->name = kstrdup(prop->name, allocflags);
+	new->value = kmemdup(prop->value, prop->length, allocflags);
+	new->length = prop->length;
+	if (!new->name || !new->value)
+		goto err_free;
+
+	/* mark the property as dynamic */
+	of_property_set_flag(new, OF_DYNAMIC);
+
+	return new;
+
+ err_free:
+	kfree(new->name);
+	kfree(new->value);
+	kfree(new);
+	return NULL;
+}
+
+/**
+ * __of_node_alloc() - Create an empty device node dynamically.
+ * @full_name:	Full name of the new device node
+ * @allocflags:	Allocation flags (typically pass GFP_KERNEL)
+ *
+ * Create an empty device tree node, suitable for further modification.
+ * The node data are dynamically allocated and all the node flags
+ * have the OF_DYNAMIC & OF_DETACHED bits set.
+ * Returns the newly allocated node or NULL on out of memory error.
+ */
+struct device_node *__of_node_alloc(const char *full_name, gfp_t allocflags)
+{
+	struct device_node *node;
+
+	node = kzalloc(sizeof(*node), allocflags);
+	if (!node)
+		return NULL;
+
+	node->full_name = kstrdup(full_name, allocflags);
+	of_node_set_flag(node, OF_DYNAMIC);
+	of_node_set_flag(node, OF_DETACHED);
+	if (!node->full_name)
+		goto err_free;
+
+	of_node_init(node);
+
+	return node;
+
+ err_free:
+	kfree(node->full_name);
+	kfree(node);
+	return NULL;
+}
+
+static void __of_changeset_entry_destroy(struct of_changeset_entry *ce)
+{
+	of_node_put(ce->np);
+	list_del(&ce->node);
+	kfree(ce);
+}
+
+#ifdef DEBUG
+static void __of_changeset_entry_dump(struct of_changeset_entry *ce)
+{
+	switch (ce->action) {
+	case OF_RECONFIG_ADD_PROPERTY:
+		pr_debug("%p: %s %s/%s\n",
+			ce, "ADD_PROPERTY   ", ce->np->full_name,
+			ce->prop->name);
+		break;
+	case OF_RECONFIG_REMOVE_PROPERTY:
+		pr_debug("%p: %s %s/%s\n",
+			ce, "REMOVE_PROPERTY", ce->np->full_name,
+			ce->prop->name);
+		break;
+	case OF_RECONFIG_UPDATE_PROPERTY:
+		pr_debug("%p: %s %s/%s\n",
+			ce, "UPDATE_PROPERTY", ce->np->full_name,
+			ce->prop->name);
+		break;
+	case OF_RECONFIG_ATTACH_NODE:
+		pr_debug("%p: %s %s\n",
+			ce, "ATTACH_NODE    ", ce->np->full_name);
+		break;
+	case OF_RECONFIG_DETACH_NODE:
+		pr_debug("%p: %s %s\n",
+			ce, "DETACH_NODE    ", ce->np->full_name);
+		break;
+	}
+}
+#else
+static inline void __of_changeset_entry_dump(struct of_changeset_entry *ce)
+{
+	/* empty */
+}
+#endif
+
+static void __of_changeset_entry_invert(struct of_changeset_entry *ce,
+					  struct of_changeset_entry *rce)
+{
+	memcpy(rce, ce, sizeof(*rce));
+
+	switch (ce->action) {
+	case OF_RECONFIG_ATTACH_NODE:
+		rce->action = OF_RECONFIG_DETACH_NODE;
+		break;
+	case OF_RECONFIG_DETACH_NODE:
+		rce->action = OF_RECONFIG_ATTACH_NODE;
+		break;
+	case OF_RECONFIG_ADD_PROPERTY:
+		rce->action = OF_RECONFIG_REMOVE_PROPERTY;
+		break;
+	case OF_RECONFIG_REMOVE_PROPERTY:
+		rce->action = OF_RECONFIG_ADD_PROPERTY;
+		break;
+	case OF_RECONFIG_UPDATE_PROPERTY:
+		rce->old_prop = ce->prop;
+		rce->prop = ce->old_prop;
+		break;
+	}
+}
+
+static void __of_changeset_entry_notify(struct of_changeset_entry *ce, bool revert)
+{
+	struct of_changeset_entry ce_inverted;
+	int ret;
+
+	if (revert) {
+		__of_changeset_entry_invert(ce, &ce_inverted);
+		ce = &ce_inverted;
+	}
+
+	switch (ce->action) {
+	case OF_RECONFIG_ATTACH_NODE:
+	case OF_RECONFIG_DETACH_NODE:
+		ret = of_reconfig_notify(ce->action, ce->np);
+		break;
+	case OF_RECONFIG_ADD_PROPERTY:
+	case OF_RECONFIG_REMOVE_PROPERTY:
+	case OF_RECONFIG_UPDATE_PROPERTY:
+		ret = of_property_notify(ce->action, ce->np, ce->prop, ce->old_prop);
+		break;
+	default:
+		pr_err("%s: invalid devicetree changeset action: %i\n", __func__,
+			(int)ce->action);
+		return;
+	}
+
+	if (ret)
+		pr_err("%s: notifier error @%s\n", __func__, ce->np->full_name);
+}
+
+static int __of_changeset_entry_apply(struct of_changeset_entry *ce)
+{
+	struct property *old_prop, **propp;
+	unsigned long flags;
+	int ret = 0;
+
+	__of_changeset_entry_dump(ce);
+
+	raw_spin_lock_irqsave(&devtree_lock, flags);
+	switch (ce->action) {
+	case OF_RECONFIG_ATTACH_NODE:
+		__of_attach_node(ce->np);
+		break;
+	case OF_RECONFIG_DETACH_NODE:
+		__of_detach_node(ce->np);
+		break;
+	case OF_RECONFIG_ADD_PROPERTY:
+		/* If the property is in deadprops then it must be removed */
+		for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) {
+			if (*propp == ce->prop) {
+				*propp = ce->prop->next;
+				ce->prop->next = NULL;
+				break;
+			}
+		}
+
+		ret = __of_add_property(ce->np, ce->prop);
+		if (ret) {
+			pr_err("%s: add_property failed @%s/%s\n",
+				__func__, ce->np->full_name,
+				ce->prop->name);
+			break;
+		}
+		break;
+	case OF_RECONFIG_REMOVE_PROPERTY:
+		ret = __of_remove_property(ce->np, ce->prop);
+		if (ret) {
+			pr_err("%s: remove_property failed @%s/%s\n",
+				__func__, ce->np->full_name,
+				ce->prop->name);
+			break;
+		}
+		break;
+
+	case OF_RECONFIG_UPDATE_PROPERTY:
+		/* If the property is in deadprops then it must be removed */
+		for (propp = &ce->np->deadprops; *propp; propp = &(*propp)->next) {
+			if (*propp == ce->prop) {
+				*propp = ce->prop->next;
+				ce->prop->next = NULL;
+				break;
+			}
+		}
+
+		ret = __of_update_property(ce->np, ce->prop, &old_prop);
+		if (ret) {
+			pr_err("%s: update_property failed @%s/%s\n",
+				__func__, ce->np->full_name,
+				ce->prop->name);
+			break;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	raw_spin_unlock_irqrestore(&devtree_lock, flags);
+
+	if (ret)
+		return ret;
+
+	switch (ce->action) {
+	case OF_RECONFIG_ATTACH_NODE:
+		__of_attach_node_sysfs(ce->np);
+		break;
+	case OF_RECONFIG_DETACH_NODE:
+		__of_detach_node_sysfs(ce->np);
+		break;
+	case OF_RECONFIG_ADD_PROPERTY:
+		/* ignore duplicate names */
+		__of_add_property_sysfs(ce->np, ce->prop);
+		break;
+	case OF_RECONFIG_REMOVE_PROPERTY:
+		__of_remove_property_sysfs(ce->np, ce->prop);
+		break;
+	case OF_RECONFIG_UPDATE_PROPERTY:
+		__of_update_property_sysfs(ce->np, ce->prop, ce->old_prop);
+		break;
+	}
+
+	return 0;
+}
+
+static inline int __of_changeset_entry_revert(struct of_changeset_entry *ce)
+{
+	struct of_changeset_entry ce_inverted;
+
+	__of_changeset_entry_invert(ce, &ce_inverted);
+	return __of_changeset_entry_apply(&ce_inverted);
+}
+
+/**
+ * of_changeset_init - Initialize a changeset for use
+ *
+ * @ocs:	changeset pointer
+ *
+ * Initialize a changeset structure
+ */
+void of_changeset_init(struct of_changeset *ocs)
+{
+	memset(ocs, 0, sizeof(*ocs));
+	INIT_LIST_HEAD(&ocs->entries);
+}
+
+/**
+ * of_changeset_destroy - Destroy a changeset
+ *
+ * @ocs:	changeset pointer
+ *
+ * Destroys a changeset. Note that if a changeset is applied,
+ * its changes to the tree cannot be reverted.
+ */
+void of_changeset_destroy(struct of_changeset *ocs)
+{
+	struct of_changeset_entry *ce, *cen;
+
+	list_for_each_entry_safe_reverse(ce, cen, &ocs->entries, node)
+		__of_changeset_entry_destroy(ce);
+}
+
+/**
+ * of_changeset_apply - Applies a changeset
+ *
+ * @ocs:	changeset pointer
+ *
+ * Applies a changeset to the live tree.
+ * Any side-effects of live tree state changes are applied here on
+ * sucess, like creation/destruction of devices and side-effects
+ * like creation of sysfs properties and directories.
+ * Returns 0 on success, a negative error value in case of an error.
+ * On error the partially applied effects are reverted.
+ */
+int of_changeset_apply(struct of_changeset *ocs)
+{
+	struct of_changeset_entry *ce;
+	int ret;
+
+	/* perform the rest of the work */
+	pr_debug("of_changeset: applying...\n");
+	list_for_each_entry(ce, &ocs->entries, node) {
+		ret = __of_changeset_entry_apply(ce);
+		if (ret) {
+			pr_err("%s: Error applying changeset (%d)\n", __func__, ret);
+			list_for_each_entry_continue_reverse(ce, &ocs->entries, node)
+				__of_changeset_entry_revert(ce);
+			return ret;
+		}
+	}
+	pr_debug("of_changeset: applied, emitting notifiers.\n");
+
+	/* drop the global lock while emitting notifiers */
+	mutex_unlock(&of_mutex);
+	list_for_each_entry(ce, &ocs->entries, node)
+		__of_changeset_entry_notify(ce, 0);
+	mutex_lock(&of_mutex);
+	pr_debug("of_changeset: notifiers sent.\n");
+
+	return 0;
+}
+
+/**
+ * of_changeset_revert - Reverts an applied changeset
+ *
+ * @ocs:	changeset pointer
+ *
+ * Reverts a changeset returning the state of the tree to what it
+ * was before the application.
+ * Any side-effects like creation/destruction of devices and
+ * removal of sysfs properties and directories are applied.
+ * Returns 0 on success, a negative error value in case of an error.
+ */
+int of_changeset_revert(struct of_changeset *ocs)
+{
+	struct of_changeset_entry *ce;
+	int ret;
+
+	pr_debug("of_changeset: reverting...\n");
+	list_for_each_entry_reverse(ce, &ocs->entries, node) {
+		ret = __of_changeset_entry_revert(ce);
+		if (ret) {
+			pr_err("%s: Error reverting changeset (%d)\n", __func__, ret);
+			list_for_each_entry_continue(ce, &ocs->entries, node)
+				__of_changeset_entry_apply(ce);
+			return ret;
+		}
+	}
+	pr_debug("of_changeset: reverted, emitting notifiers.\n");
+
+	/* drop the global lock while emitting notifiers */
+	mutex_unlock(&of_mutex);
+	list_for_each_entry_reverse(ce, &ocs->entries, node)
+		__of_changeset_entry_notify(ce, 1);
+	mutex_lock(&of_mutex);
+	pr_debug("of_changeset: notifiers sent.\n");
+
+	return 0;
+}
+
+/**
+ * of_changeset_action - Perform a changeset action
+ *
+ * @ocs:	changeset pointer
+ * @action:	action to perform
+ * @np:		Pointer to device node
+ * @prop:	Pointer to property
+ *
+ * On action being one of:
+ * + OF_RECONFIG_ATTACH_NODE
+ * + OF_RECONFIG_DETACH_NODE,
+ * + OF_RECONFIG_ADD_PROPERTY
+ * + OF_RECONFIG_REMOVE_PROPERTY,
+ * + OF_RECONFIG_UPDATE_PROPERTY
+ * Returns 0 on success, a negative error value in case of an error.
+ */
+int of_changeset_action(struct of_changeset *ocs, unsigned long action,
+		struct device_node *np, struct property *prop)
+{
+	struct of_changeset_entry *ce;
+
+	ce = kzalloc(sizeof(*ce), GFP_KERNEL);
+	if (!ce) {
+		pr_err("%s: Failed to allocate\n", __func__);
+		return -ENOMEM;
+	}
+	/* get a reference to the node */
+	ce->action = action;
+	ce->np = of_node_get(np);
+	ce->prop = prop;
+
+	if (action == OF_RECONFIG_UPDATE_PROPERTY && prop)
+		ce->old_prop = of_find_property(np, prop->name, NULL);
+
+	/* add it to the list */
+	list_add_tail(&ce->node, &ocs->entries);
+	return 0;
+}
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 9aa012e..f46a24f 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -923,24 +923,24 @@
 }
 
 #ifdef CONFIG_HAVE_MEMBLOCK
+#define MAX_PHYS_ADDR	((phys_addr_t)~0)
+
 void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
 {
 	const u64 phys_offset = __pa(PAGE_OFFSET);
 	base &= PAGE_MASK;
 	size &= PAGE_MASK;
 
-	if (sizeof(phys_addr_t) < sizeof(u64)) {
-		if (base > ULONG_MAX) {
-			pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
-					base, base + size);
-			return;
-		}
+	if (base > MAX_PHYS_ADDR) {
+		pr_warning("Ignoring memory block 0x%llx - 0x%llx\n",
+				base, base + size);
+		return;
+	}
 
-		if (base + size > ULONG_MAX) {
-			pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
-					ULONG_MAX, base + size);
-			size = ULONG_MAX - base;
-		}
+	if (base + size > MAX_PHYS_ADDR) {
+		pr_warning("Ignoring memory range 0x%lx - 0x%llx\n",
+				ULONG_MAX, base + size);
+		size = MAX_PHYS_ADDR - base;
 	}
 
 	if (base + size < phys_offset) {
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index ff350c8..858e0a5 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -31,6 +31,63 @@
 	char stem[0];
 };
 
-extern struct mutex of_aliases_mutex;
+extern struct mutex of_mutex;
 extern struct list_head aliases_lookup;
+extern struct kset *of_kset;
+
+
+static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
+{
+	return container_of(kobj, struct device_node, kobj);
+}
+
+#if defined(CONFIG_OF_DYNAMIC)
+extern int of_property_notify(int action, struct device_node *np,
+			      struct property *prop, struct property *old_prop);
+extern void of_node_release(struct kobject *kobj);
+#else /* CONFIG_OF_DYNAMIC */
+static inline int of_property_notify(int action, struct device_node *np,
+				     struct property *prop, struct property *old_prop)
+{
+	return 0;
+}
+#endif /* CONFIG_OF_DYNAMIC */
+
+/**
+ * General utilities for working with live trees.
+ *
+ * All functions with two leading underscores operate
+ * without taking node references, so you either have to
+ * own the devtree lock or work on detached trees only.
+ */
+struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
+struct device_node *__of_node_alloc(const char *full_name, gfp_t allocflags);
+
+extern const void *__of_get_property(const struct device_node *np,
+				     const char *name, int *lenp);
+extern int __of_add_property(struct device_node *np, struct property *prop);
+extern int __of_add_property_sysfs(struct device_node *np,
+		struct property *prop);
+extern int __of_remove_property(struct device_node *np, struct property *prop);
+extern void __of_remove_property_sysfs(struct device_node *np,
+		struct property *prop);
+extern int __of_update_property(struct device_node *np,
+		struct property *newprop, struct property **oldprop);
+extern void __of_update_property_sysfs(struct device_node *np,
+		struct property *newprop, struct property *oldprop);
+
+extern void __of_attach_node(struct device_node *np);
+extern int __of_attach_node_sysfs(struct device_node *np);
+extern void __of_detach_node(struct device_node *np);
+extern void __of_detach_node_sysfs(struct device_node *np);
+
+/* iterators for transactions, used for overlays */
+/* forward iterator */
+#define for_each_transaction_entry(_oft, _te) \
+	list_for_each_entry(_te, &(_oft)->te_list, node)
+
+/* reverse iterator */
+#define for_each_transaction_entry_reverse(_oft, _te) \
+	list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
+
 #endif /* _LINUX_OF_PRIVATE_H */
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 632aae8..59fb12e 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -206,8 +206,16 @@
 	for (i = 0; i < reserved_mem_count; i++) {
 		struct reserved_mem *rmem = &reserved_mem[i];
 		unsigned long node = rmem->fdt_node;
+		int len;
+		const __be32 *prop;
 		int err = 0;
 
+		prop = of_get_flat_dt_prop(node, "phandle", &len);
+		if (!prop)
+			prop = of_get_flat_dt_prop(node, "linux,phandle", &len);
+		if (prop)
+			rmem->phandle = of_read_number(prop, len/4);
+
 		if (rmem->size == 0)
 			err = __reserved_mem_alloc_size(node, rmem->name,
 						 &rmem->base, &rmem->size);
@@ -215,3 +223,65 @@
 			__reserved_mem_init_node(rmem);
 	}
 }
+
+static inline struct reserved_mem *__find_rmem(struct device_node *node)
+{
+	unsigned int i;
+
+	if (!node->phandle)
+		return NULL;
+
+	for (i = 0; i < reserved_mem_count; i++)
+		if (reserved_mem[i].phandle == node->phandle)
+			return &reserved_mem[i];
+	return NULL;
+}
+
+/**
+ * of_reserved_mem_device_init() - assign reserved memory region to given device
+ *
+ * This function assign memory region pointed by "memory-region" device tree
+ * property to the given device.
+ */
+void of_reserved_mem_device_init(struct device *dev)
+{
+	struct reserved_mem *rmem;
+	struct device_node *np;
+
+	np = of_parse_phandle(dev->of_node, "memory-region", 0);
+	if (!np)
+		return;
+
+	rmem = __find_rmem(np);
+	of_node_put(np);
+
+	if (!rmem || !rmem->ops || !rmem->ops->device_init)
+		return;
+
+	rmem->ops->device_init(rmem, dev);
+	dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
+}
+
+/**
+ * of_reserved_mem_device_release() - release reserved memory device structures
+ *
+ * This function releases structures allocated for memory region handling for
+ * the given device.
+ */
+void of_reserved_mem_device_release(struct device *dev)
+{
+	struct reserved_mem *rmem;
+	struct device_node *np;
+
+	np = of_parse_phandle(dev->of_node, "memory-region", 0);
+	if (!np)
+		return;
+
+	rmem = __find_rmem(np);
+	of_node_put(np);
+
+	if (!rmem || !rmem->ops || !rmem->ops->device_release)
+		return;
+
+	rmem->ops->device_release(rmem, dev);
+}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 500436f..0197725 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -422,6 +422,7 @@
 			break;
 		}
 	}
+	of_node_set_flag(bus, OF_POPULATED_BUS);
 	return rc;
 }
 
@@ -508,19 +509,13 @@
 
 static int of_platform_device_destroy(struct device *dev, void *data)
 {
-	bool *children_left = data;
-
 	/* Do not touch devices not populated from the device tree */
-	if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED)) {
-		*children_left = true;
+	if (!dev->of_node || !of_node_check_flag(dev->of_node, OF_POPULATED))
 		return 0;
-	}
 
-	/* Recurse, but don't touch this device if it has any children left */
-	if (of_platform_depopulate(dev) != 0) {
-		*children_left = true;
-		return 0;
-	}
+	/* Recurse for any nodes that were treated as busses */
+	if (of_node_check_flag(dev->of_node, OF_POPULATED_BUS))
+		device_for_each_child(dev, NULL, of_platform_device_destroy);
 
 	if (dev->bus == &platform_bus_type)
 		platform_device_unregister(to_platform_device(dev));
@@ -528,19 +523,15 @@
 	else if (dev->bus == &amba_bustype)
 		amba_device_unregister(to_amba_device(dev));
 #endif
-	else {
-		*children_left = true;
-		return 0;
-	}
 
 	of_node_clear_flag(dev->of_node, OF_POPULATED);
-
+	of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);
 	return 0;
 }
 
 /**
  * of_platform_depopulate() - Remove devices populated from device tree
- * @parent: device which childred will be removed
+ * @parent: device which children will be removed
  *
  * Complementary to of_platform_populate(), this function removes children
  * of the given device (and, recurrently, their children) that have been
@@ -550,14 +541,9 @@
  * Returns 0 when all children devices have been removed or
  * -EBUSY when some children remained.
  */
-int of_platform_depopulate(struct device *parent)
+void of_platform_depopulate(struct device *parent)
 {
-	bool children_left = false;
-
-	device_for_each_child(parent, &children_left,
-			      of_platform_device_destroy);
-
-	return children_left ? -EBUSY : 0;
+	device_for_each_child(parent, NULL, of_platform_device_destroy);
 }
 EXPORT_SYMBOL_GPL(of_platform_depopulate);
 
diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 077314e..d410026 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -9,6 +9,7 @@
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_fdt.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/list.h>
@@ -16,11 +17,17 @@
 #include <linux/slab.h>
 #include <linux/device.h>
 
+#include "of_private.h"
+
 static struct selftest_results {
 	int passed;
 	int failed;
 } selftest_results;
 
+#define NO_OF_NODES 2
+static struct device_node *nodes[NO_OF_NODES];
+static int last_node_index;
+
 #define selftest(result, fmt, ...) { \
 	if (!(result)) { \
 		selftest_results.failed++; \
@@ -266,6 +273,81 @@
 	selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
 }
 
+#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
+			(p1)->value && (p2)->value && \
+			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
+			!strcmp((p1)->name, (p2)->name))
+static void __init of_selftest_property_copy(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property p1 = { .name = "p1", .length = 0, .value = "" };
+	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
+	struct property *new;
+
+	new = __of_prop_dup(&p1, GFP_KERNEL);
+	selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+
+	new = __of_prop_dup(&p2, GFP_KERNEL);
+	selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
+	kfree(new->value);
+	kfree(new->name);
+	kfree(new);
+#endif
+}
+
+static void __init of_selftest_changeset(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
+	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
+	struct property *ppremove;
+	struct device_node *n1, *n2, *n21, *nremove, *parent;
+	struct of_changeset chgset;
+
+	of_changeset_init(&chgset);
+	n1 = __of_node_alloc("/testcase-data/changeset/n1", GFP_KERNEL);
+	selftest(n1, "testcase setup failure\n");
+	n2 = __of_node_alloc("/testcase-data/changeset/n2", GFP_KERNEL);
+	selftest(n2, "testcase setup failure\n");
+	n21 = __of_node_alloc("/testcase-data/changeset/n2/n21", GFP_KERNEL);
+	selftest(n21, "testcase setup failure %p\n", n21);
+	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
+	selftest(nremove, "testcase setup failure\n");
+	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
+	selftest(ppadd, "testcase setup failure\n");
+	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
+	selftest(ppupdate, "testcase setup failure\n");
+	parent = nremove->parent;
+	n1->parent = parent;
+	n2->parent = parent;
+	n21->parent = n2;
+	n2->child = n21;
+	ppremove = of_find_property(parent, "prop-remove", NULL);
+	selftest(ppremove, "failed to find removal prop");
+
+	of_changeset_init(&chgset);
+	selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
+	selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
+	selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
+	selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
+	selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
+	selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+	selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_apply(&chgset), "apply failed\n");
+	mutex_unlock(&of_mutex);
+
+	mutex_lock(&of_mutex);
+	selftest(!of_changeset_revert(&chgset), "revert failed\n");
+	mutex_unlock(&of_mutex);
+
+	of_changeset_destroy(&chgset);
+#endif
+}
+
 static void __init of_selftest_parse_interrupts(void)
 {
 	struct device_node *np;
@@ -517,9 +599,156 @@
 	}
 }
 
+/**
+ *	update_node_properties - adds the properties
+ *	of np into dup node (present in live tree) and
+ *	updates parent of children of np to dup.
+ *
+ *	@np:	node already present in live tree
+ *	@dup:	node present in live tree to be updated
+ */
+static void update_node_properties(struct device_node *np,
+					struct device_node *dup)
+{
+	struct property *prop;
+	struct device_node *child;
+
+	for_each_property_of_node(np, prop)
+		of_add_property(dup, prop);
+
+	for_each_child_of_node(np, child)
+		child->parent = dup;
+}
+
+/**
+ *	attach_node_and_children - attaches nodes
+ *	and its children to live tree
+ *
+ *	@np:	Node to attach to live tree
+ */
+static int attach_node_and_children(struct device_node *np)
+{
+	struct device_node *next, *root = np, *dup;
+
+	if (!np) {
+		pr_warn("%s: No tree to attach; not running tests\n",
+			__func__);
+		return -ENODATA;
+	}
+
+
+	/* skip root node */
+	np = np->child;
+	/* storing a copy in temporary node */
+	dup = np;
+
+	while (dup) {
+		nodes[last_node_index++] = dup;
+		dup = dup->sibling;
+	}
+	dup = NULL;
+
+	while (np) {
+		next = np->allnext;
+		dup = of_find_node_by_path(np->full_name);
+		if (dup)
+			update_node_properties(np, dup);
+		else {
+			np->child = NULL;
+			if (np->parent == root)
+				np->parent = of_allnodes;
+			of_attach_node(np);
+		}
+		np = next;
+	}
+
+	return 0;
+}
+
+/**
+ *	selftest_data_add - Reads, copies data from
+ *	linked tree and attaches it to the live tree
+ */
+static int __init selftest_data_add(void)
+{
+	void *selftest_data;
+	struct device_node *selftest_data_node;
+	extern uint8_t __dtb_testcases_begin[];
+	extern uint8_t __dtb_testcases_end[];
+	const int size = __dtb_testcases_end - __dtb_testcases_begin;
+
+	if (!size || !of_allnodes) {
+		pr_warn("%s: No testcase data to attach; not running tests\n",
+			__func__);
+		return -ENODATA;
+	}
+
+	/* creating copy */
+	selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
+
+	if (!selftest_data) {
+		pr_warn("%s: Failed to allocate memory for selftest_data; "
+			"not running tests\n", __func__);
+		return -ENOMEM;
+	}
+	of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
+
+	/* attach the sub-tree to live tree */
+	return attach_node_and_children(selftest_data_node);
+}
+
+/**
+ *	detach_node_and_children - detaches node
+ *	and its children from live tree
+ *
+ *	@np:	Node to detach from live tree
+ */
+static void detach_node_and_children(struct device_node *np)
+{
+	while (np->child)
+		detach_node_and_children(np->child);
+
+	while (np->sibling)
+		detach_node_and_children(np->sibling);
+
+	of_detach_node(np);
+}
+
+/**
+ *	selftest_data_remove - removes the selftest data
+ *	nodes from the live tree
+ */
+static void selftest_data_remove(void)
+{
+	struct device_node *np;
+	struct property *prop;
+
+	while (last_node_index >= 0) {
+		if (nodes[last_node_index]) {
+			np = of_find_node_by_path(nodes[last_node_index]->full_name);
+			if (strcmp(np->full_name, "/aliases") != 0) {
+				detach_node_and_children(np->child);
+				of_detach_node(np);
+			} else {
+				for_each_property_of_node(np, prop) {
+					if (strcmp(prop->name, "testcase-alias") == 0)
+						of_remove_property(np, prop);
+				}
+			}
+		}
+		last_node_index--;
+	}
+}
+
 static int __init of_selftest(void)
 {
 	struct device_node *np;
+	int res;
+
+	/* adding data for selftest */
+	res = selftest_data_add();
+	if (res)
+		return res;
 
 	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
 	if (!np) {
@@ -533,12 +762,18 @@
 	of_selftest_dynamic();
 	of_selftest_parse_phandle_with_args();
 	of_selftest_property_match_string();
+	of_selftest_property_copy();
+	of_selftest_changeset();
 	of_selftest_parse_interrupts();
 	of_selftest_parse_interrupts_extended();
 	of_selftest_match_node();
 	of_selftest_platform_populate();
 	pr_info("end of selftest - %i passed, %i failed\n",
 		selftest_results.passed, selftest_results.failed);
+
+	/* removing selftest data from live tree */
+	selftest_data_remove();
+
 	return 0;
 }
 late_initcall(of_selftest);
diff --git a/drivers/of/testcase-data/testcases.dts b/drivers/of/testcase-data/testcases.dts
new file mode 100644
index 0000000..219ef93
--- /dev/null
+++ b/drivers/of/testcase-data/testcases.dts
@@ -0,0 +1,15 @@
+/dts-v1/;
+/ {
+	testcase-data {
+		changeset {
+			prop-update = "hello";
+			prop-remove = "world";
+			node-remove {
+			};
+		};
+	};
+};
+#include "tests-phandle.dtsi"
+#include "tests-interrupts.dtsi"
+#include "tests-match.dtsi"
+#include "tests-platform.dtsi"
diff --git a/drivers/of/testcase-data/testcases.dtsi b/drivers/of/testcase-data/testcases.dtsi
deleted file mode 100644
index 6d8d980a..0000000
--- a/drivers/of/testcase-data/testcases.dtsi
+++ /dev/null
@@ -1,4 +0,0 @@
-#include "tests-phandle.dtsi"
-#include "tests-interrupts.dtsi"
-#include "tests-match.dtsi"
-#include "tests-platform.dtsi"
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index 93aa29f..f2945fa 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -375,11 +375,11 @@
 
 static int __init rpaphp_init(void)
 {
-	struct device_node *dn = NULL;
+	struct device_node *dn;
 
 	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
 
-	while ((dn = of_find_node_by_name(dn, "pci")))
+	for_each_node_by_name(dn, "pci")
 		rpaphp_add_slot(dn);
 
 	return 0;
diff --git a/drivers/scsi/cxgbi/cxgb3i/Kconfig b/drivers/scsi/cxgbi/cxgb3i/Kconfig
index 6bbc36f..e460398 100644
--- a/drivers/scsi/cxgbi/cxgb3i/Kconfig
+++ b/drivers/scsi/cxgbi/cxgb3i/Kconfig
@@ -1,6 +1,6 @@
 config SCSI_CXGB3_ISCSI
 	tristate "Chelsio T3 iSCSI support"
-	depends on PCI && INET
+	depends on PCI && INET && (IPV6 || IPV6=n)
 	select NETDEVICES
 	select ETHERNET
 	select NET_VENDOR_CHELSIO
diff --git a/drivers/scsi/cxgbi/cxgb4i/Kconfig b/drivers/scsi/cxgbi/cxgb4i/Kconfig
index 16b2c7d..8c4e423 100644
--- a/drivers/scsi/cxgbi/cxgb4i/Kconfig
+++ b/drivers/scsi/cxgbi/cxgb4i/Kconfig
@@ -1,6 +1,6 @@
 config SCSI_CXGB4_ISCSI
 	tristate "Chelsio T4 iSCSI support"
-	depends on PCI && INET
+	depends on PCI && INET && (IPV6 || IPV6=n)
 	select NETDEVICES
 	select ETHERNET
 	select NET_VENDOR_CHELSIO
diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c
index 43fea22..ae45bd9 100644
--- a/drivers/scsi/scsi_transport_srp.c
+++ b/drivers/scsi/scsi_transport_srp.c
@@ -472,7 +472,8 @@
 	if (delay > 0)
 		queue_delayed_work(system_long_wq, &rport->reconnect_work,
 				   1UL * delay * HZ);
-	if (srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) {
+	if ((fast_io_fail_tmo >= 0 || dev_loss_tmo >= 0) &&
+	    srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) {
 		pr_debug("%s new state: %d\n", dev_name(&shost->shost_gendev),
 			 rport->state);
 		scsi_target_block(&shost->shost_gendev);
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index f9a1386..693208e 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -151,7 +151,7 @@
 
 config DOVE_THERMAL
 	tristate "Temperature sensor on Marvell Dove SoCs"
-	depends on ARCH_DOVE
+	depends on ARCH_DOVE || MACH_DOVE
 	depends on OF
 	help
 	  Support for the Dove thermal sensor driver in the Linux thermal
@@ -243,4 +243,9 @@
 source "drivers/thermal/samsung/Kconfig"
 endmenu
 
+menu "STMicroelectronics thermal drivers"
+depends on ARCH_STI && OF
+source "drivers/thermal/st/Kconfig"
+endmenu
+
 endif
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index de0636a..31e232f 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -32,3 +32,4 @@
 obj-$(CONFIG_INTEL_SOC_DTS_THERMAL)	+= intel_soc_dts_thermal.o
 obj-$(CONFIG_TI_SOC_THERMAL)	+= ti-soc-thermal/
 obj-$(CONFIG_ACPI_INT3403_THERMAL)	+= int3403_thermal.o
+obj-$(CONFIG_ST_THERMAL)	+= st/
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 84a75f8..1ab0018 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -305,7 +305,7 @@
  * @event: value showing cpufreq event for which this function invoked.
  * @data: callback-specific data
  *
- * Callback to highjack the notification on cpufreq policy transition.
+ * Callback to hijack the notification on cpufreq policy transition.
  * Every time there is a change in policy, we will intercept and
  * update the cpufreq policy with thermal constraints.
  *
diff --git a/drivers/thermal/int3403_thermal.c b/drivers/thermal/int3403_thermal.c
index e93f025..17554ee 100644
--- a/drivers/thermal/int3403_thermal.c
+++ b/drivers/thermal/int3403_thermal.c
@@ -33,6 +33,10 @@
 struct int3403_sensor {
 	struct thermal_zone_device *tzone;
 	unsigned long *thresholds;
+	unsigned long	crit_temp;
+	int		crit_trip_id;
+	unsigned long	psv_temp;
+	int		psv_trip_id;
 };
 
 static int sys_get_curr_temp(struct thermal_zone_device *tzone,
@@ -79,12 +83,18 @@
 	struct acpi_device *device = tzone->devdata;
 	struct int3403_sensor *obj = acpi_driver_data(device);
 
-	/*
-	 * get_trip_temp is a mandatory callback but
-	 * PATx method doesn't return any value, so return
-	 * cached value, which was last set from user space.
-	 */
-	*temp = obj->thresholds[trip];
+	if (trip == obj->crit_trip_id)
+		*temp = obj->crit_temp;
+	else if (trip == obj->psv_trip_id)
+		*temp = obj->psv_temp;
+	else {
+		/*
+		 * get_trip_temp is a mandatory callback but
+		 * PATx method doesn't return any value, so return
+		 * cached value, which was last set from user space.
+		 */
+		*temp = obj->thresholds[trip];
+	}
 
 	return 0;
 }
@@ -92,8 +102,14 @@
 static int sys_get_trip_type(struct thermal_zone_device *thermal,
 		int trip, enum thermal_trip_type *type)
 {
+	struct acpi_device *device = thermal->devdata;
+	struct int3403_sensor *obj = acpi_driver_data(device);
+
 	/* Mandatory callback, may not mean much here */
-	*type = THERMAL_TRIP_PASSIVE;
+	if (trip == obj->crit_trip_id)
+		*type = THERMAL_TRIP_CRITICAL;
+	else
+		*type = THERMAL_TRIP_PASSIVE;
 
 	return 0;
 }
@@ -155,6 +171,34 @@
 	}
 }
 
+static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long crt;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
+
+	return 0;
+}
+
+static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long psv;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
+
+	return 0;
+}
+
 static int acpi_int3403_add(struct acpi_device *device)
 {
 	int result = 0;
@@ -194,6 +238,15 @@
 			return -ENOMEM;
 		trip_mask = BIT(trip_cnt) - 1;
 	}
+
+	obj->psv_trip_id = -1;
+	if (!sys_get_trip_psv(device, &obj->psv_temp))
+		obj->psv_trip_id = trip_cnt++;
+
+	obj->crit_trip_id = -1;
+	if (!sys_get_trip_crt(device, &obj->crit_temp))
+		obj->crit_trip_id = trip_cnt++;
+
 	obj->tzone = thermal_zone_device_register(acpi_device_bid(device),
 				trip_cnt, trip_mask, device, &tzone_ops,
 				NULL, 0, 0);
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index d7ca9f4..acbff14 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -505,6 +505,10 @@
 
 static const struct of_device_id exynos_tmu_match[] = {
 	{
+		.compatible = "samsung,exynos3250-tmu",
+		.data = (void *)EXYNOS3250_TMU_DRV_DATA,
+	},
+	{
 		.compatible = "samsung,exynos4210-tmu",
 		.data = (void *)EXYNOS4210_TMU_DRV_DATA,
 	},
@@ -677,7 +681,8 @@
 		goto err_clk_sec;
 	}
 
-	if (pdata->type == SOC_ARCH_EXYNOS4210 ||
+	if (pdata->type == SOC_ARCH_EXYNOS3250 ||
+	    pdata->type == SOC_ARCH_EXYNOS4210 ||
 	    pdata->type == SOC_ARCH_EXYNOS4412 ||
 	    pdata->type == SOC_ARCH_EXYNOS5250 ||
 	    pdata->type == SOC_ARCH_EXYNOS5260 ||
@@ -759,10 +764,10 @@
 {
 	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 
-	exynos_tmu_control(pdev, false);
-
 	exynos_unregister_thermal(data->reg_conf);
 
+	exynos_tmu_control(pdev, false);
+
 	clk_unprepare(data->clk);
 	if (!IS_ERR(data->clk_sec))
 		clk_unprepare(data->clk_sec);
diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
index edd08cf..1b4a644 100644
--- a/drivers/thermal/samsung/exynos_tmu.h
+++ b/drivers/thermal/samsung/exynos_tmu.h
@@ -40,7 +40,8 @@
 };
 
 enum soc_type {
-	SOC_ARCH_EXYNOS4210 = 1,
+	SOC_ARCH_EXYNOS3250 = 1,
+	SOC_ARCH_EXYNOS4210,
 	SOC_ARCH_EXYNOS4412,
 	SOC_ARCH_EXYNOS5250,
 	SOC_ARCH_EXYNOS5260,
diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
index c1d81dc..aa8e0de 100644
--- a/drivers/thermal/samsung/exynos_tmu_data.c
+++ b/drivers/thermal/samsung/exynos_tmu_data.c
@@ -90,6 +90,95 @@
 };
 #endif
 
+#if defined(CONFIG_SOC_EXYNOS3250)
+static const struct exynos_tmu_registers exynos3250_tmu_registers = {
+	.triminfo_data = EXYNOS_TMU_REG_TRIMINFO,
+	.triminfo_25_shift = EXYNOS_TRIMINFO_25_SHIFT,
+	.triminfo_85_shift = EXYNOS_TRIMINFO_85_SHIFT,
+	.tmu_ctrl = EXYNOS_TMU_REG_CONTROL,
+	.test_mux_addr_shift = EXYNOS4412_MUX_ADDR_SHIFT,
+	.buf_vref_sel_shift = EXYNOS_TMU_REF_VOLTAGE_SHIFT,
+	.buf_vref_sel_mask = EXYNOS_TMU_REF_VOLTAGE_MASK,
+	.therm_trip_mode_shift = EXYNOS_TMU_TRIP_MODE_SHIFT,
+	.therm_trip_mode_mask = EXYNOS_TMU_TRIP_MODE_MASK,
+	.therm_trip_en_shift = EXYNOS_TMU_THERM_TRIP_EN_SHIFT,
+	.buf_slope_sel_shift = EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT,
+	.buf_slope_sel_mask = EXYNOS_TMU_BUF_SLOPE_SEL_MASK,
+	.core_en_shift = EXYNOS_TMU_CORE_EN_SHIFT,
+	.tmu_status = EXYNOS_TMU_REG_STATUS,
+	.tmu_cur_temp = EXYNOS_TMU_REG_CURRENT_TEMP,
+	.threshold_th0 = EXYNOS_THD_TEMP_RISE,
+	.threshold_th1 = EXYNOS_THD_TEMP_FALL,
+	.tmu_inten = EXYNOS_TMU_REG_INTEN,
+	.inten_rise0_shift = EXYNOS_TMU_INTEN_RISE0_SHIFT,
+	.inten_rise1_shift = EXYNOS_TMU_INTEN_RISE1_SHIFT,
+	.inten_rise2_shift = EXYNOS_TMU_INTEN_RISE2_SHIFT,
+	.inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
+	.tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
+	.tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
+	.intclr_fall_shift = EXYNOS_TMU_CLEAR_FALL_INT_SHIFT,
+	.intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
+	.intclr_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
+	.intclr_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
+	.emul_con = EXYNOS_EMUL_CON,
+	.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
+	.emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
+	.emul_time_mask = EXYNOS_EMUL_TIME_MASK,
+};
+
+#define EXYNOS3250_TMU_DATA \
+	.threshold_falling = 10, \
+	.trigger_levels[0] = 70, \
+	.trigger_levels[1] = 95, \
+	.trigger_levels[2] = 110, \
+	.trigger_levels[3] = 120, \
+	.trigger_enable[0] = true, \
+	.trigger_enable[1] = true, \
+	.trigger_enable[2] = true, \
+	.trigger_enable[3] = false, \
+	.trigger_type[0] = THROTTLE_ACTIVE, \
+	.trigger_type[1] = THROTTLE_ACTIVE, \
+	.trigger_type[2] = SW_TRIP, \
+	.trigger_type[3] = HW_TRIP, \
+	.max_trigger_level = 4, \
+	.gain = 8, \
+	.reference_voltage = 16, \
+	.noise_cancel_mode = 4, \
+	.cal_type = TYPE_TWO_POINT_TRIMMING, \
+	.efuse_value = 55, \
+	.min_efuse_value = 40, \
+	.max_efuse_value = 100, \
+	.first_point_trim = 25, \
+	.second_point_trim = 85, \
+	.default_temp_offset = 50, \
+	.freq_tab[0] = { \
+		.freq_clip_max = 800 * 1000, \
+		.temp_level = 70, \
+	}, \
+	.freq_tab[1] = { \
+		.freq_clip_max = 400 * 1000, \
+		.temp_level = 95, \
+	}, \
+	.freq_tab_count = 2, \
+	.registers = &exynos3250_tmu_registers, \
+	.features = (TMU_SUPPORT_EMULATION | \
+			TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
+			TMU_SUPPORT_EMUL_TIME)
+#endif
+
+#if defined(CONFIG_SOC_EXYNOS3250)
+struct exynos_tmu_init_data const exynos3250_default_tmu_data = {
+	.tmu_data = {
+		{
+			EXYNOS3250_TMU_DATA,
+			.type = SOC_ARCH_EXYNOS3250,
+			.test_mux = EXYNOS4412_MUX_ADDR_VALUE,
+		},
+	},
+	.tmu_count = 1,
+};
+#endif
+
 #if defined(CONFIG_SOC_EXYNOS4412) || defined(CONFIG_SOC_EXYNOS5250)
 static const struct exynos_tmu_registers exynos4412_tmu_registers = {
 	.triminfo_data = EXYNOS_TMU_REG_TRIMINFO,
diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
index d268981..f0979e5 100644
--- a/drivers/thermal/samsung/exynos_tmu_data.h
+++ b/drivers/thermal/samsung/exynos_tmu_data.h
@@ -148,6 +148,13 @@
 #define EXYNOS5440_TMU_TH_RISE4_SHIFT		24
 #define EXYNOS5440_EFUSE_SWAP_OFFSET		8
 
+#if defined(CONFIG_SOC_EXYNOS3250)
+extern struct exynos_tmu_init_data const exynos3250_default_tmu_data;
+#define EXYNOS3250_TMU_DRV_DATA (&exynos3250_default_tmu_data)
+#else
+#define EXYNOS3250_TMU_DRV_DATA (NULL)
+#endif
+
 #if defined(CONFIG_CPU_EXYNOS4210)
 extern struct exynos_tmu_init_data const exynos4210_default_tmu_data;
 #define EXYNOS4210_TMU_DRV_DATA (&exynos4210_default_tmu_data)
diff --git a/drivers/thermal/st/Kconfig b/drivers/thermal/st/Kconfig
new file mode 100644
index 0000000..490fdbe
--- /dev/null
+++ b/drivers/thermal/st/Kconfig
@@ -0,0 +1,12 @@
+config ST_THERMAL
+       tristate "Thermal sensors on STMicroelectronics STi series of SoCs"
+       help
+         Support for thermal sensors on STMicroelectronics STi series of SoCs.
+
+config ST_THERMAL_SYSCFG
+	select ST_THERMAL
+	tristate "STi series syscfg register access based thermal sensors"
+
+config ST_THERMAL_MEMMAP
+	select ST_THERMAL
+	tristate "STi series memory mapped access based thermal sensors"
diff --git a/drivers/thermal/st/Makefile b/drivers/thermal/st/Makefile
new file mode 100644
index 0000000..b388789
--- /dev/null
+++ b/drivers/thermal/st/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_ST_THERMAL)		:= st_thermal.o
+obj-$(CONFIG_ST_THERMAL_SYSCFG)		+= st_thermal_syscfg.o
+obj-$(CONFIG_ST_THERMAL_MEMMAP)		+= st_thermal_memmap.o
diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c
new file mode 100644
index 0000000..90163b3
--- /dev/null
+++ b/drivers/thermal/st/st_thermal.c
@@ -0,0 +1,313 @@
+/*
+ * ST Thermal Sensor Driver core routines
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include "st_thermal.h"
+
+/* The Thermal Framework expects millidegrees */
+#define mcelsius(temp)			((temp) * 1000)
+
+/*
+ * Function to allocate regfields which are common
+ * between syscfg and memory mapped based sensors
+ */
+int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct regmap *regmap = sensor->regmap;
+	const struct reg_field *reg_fields = sensor->cdata->reg_fields;
+
+	sensor->dcorrect = devm_regmap_field_alloc(dev, regmap,
+						   reg_fields[DCORRECT]);
+
+	sensor->overflow = devm_regmap_field_alloc(dev, regmap,
+						   reg_fields[OVERFLOW]);
+
+	sensor->temp_data = devm_regmap_field_alloc(dev, regmap,
+						    reg_fields[DATA]);
+
+	if (IS_ERR(sensor->dcorrect) ||
+	    IS_ERR(sensor->overflow) ||
+	    IS_ERR(sensor->temp_data)) {
+		dev_err(dev, "failed to allocate common regfields\n");
+		return -EINVAL;
+	}
+
+	return sensor->ops->alloc_regfields(sensor);
+}
+
+static int st_thermal_sensor_on(struct st_thermal_sensor *sensor)
+{
+	int ret;
+	struct device *dev = sensor->dev;
+
+	ret = clk_prepare_enable(sensor->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable clk\n");
+		return ret;
+	}
+
+	ret = sensor->ops->power_ctrl(sensor, POWER_ON);
+	if (ret) {
+		dev_err(dev, "failed to power on sensor\n");
+		clk_disable_unprepare(sensor->clk);
+	}
+
+	return ret;
+}
+
+static int st_thermal_sensor_off(struct st_thermal_sensor *sensor)
+{
+	int ret;
+
+	ret = sensor->ops->power_ctrl(sensor, POWER_OFF);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(sensor->clk);
+
+	return 0;
+}
+
+static int st_thermal_calibration(struct st_thermal_sensor *sensor)
+{
+	int ret;
+	unsigned int val;
+	struct device *dev = sensor->dev;
+
+	/* Check if sensor calibration data is already written */
+	ret = regmap_field_read(sensor->dcorrect, &val);
+	if (ret) {
+		dev_err(dev, "failed to read calibration data\n");
+		return ret;
+	}
+
+	if (!val) {
+		/*
+		 * Sensor calibration value not set by bootloader,
+		 * default calibration data to be used
+		 */
+		ret = regmap_field_write(sensor->dcorrect,
+					 sensor->cdata->calibration_val);
+		if (ret)
+			dev_err(dev, "failed to set calibration data\n");
+	}
+
+	return ret;
+}
+
+/* Callback to get temperature from HW*/
+static int st_thermal_get_temp(struct thermal_zone_device *th,
+		unsigned long *temperature)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+	unsigned int temp;
+	unsigned int overflow;
+	int ret;
+
+	ret = regmap_field_read(sensor->overflow, &overflow);
+	if (ret)
+		return ret;
+	if (overflow)
+		return -EIO;
+
+	ret = regmap_field_read(sensor->temp_data, &temp);
+	if (ret)
+		return ret;
+
+	temp += sensor->cdata->temp_adjust_val;
+	temp = mcelsius(temp);
+
+	dev_dbg(dev, "temperature: %d\n", temp);
+
+	*temperature = temp;
+
+	return 0;
+}
+
+static int st_thermal_get_trip_type(struct thermal_zone_device *th,
+				int trip, enum thermal_trip_type *type)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+
+	switch (trip) {
+	case 0:
+		*type = THERMAL_TRIP_CRITICAL;
+		break;
+	default:
+		dev_err(dev, "invalid trip point\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int st_thermal_get_trip_temp(struct thermal_zone_device *th,
+				    int trip, unsigned long *temp)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+
+	switch (trip) {
+	case 0:
+		*temp = mcelsius(sensor->cdata->crit_temp);
+		break;
+	default:
+		dev_err(dev, "Invalid trip point\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct thermal_zone_device_ops st_tz_ops = {
+	.get_temp	= st_thermal_get_temp,
+	.get_trip_type	= st_thermal_get_trip_type,
+	.get_trip_temp	= st_thermal_get_trip_temp,
+};
+
+int st_thermal_register(struct platform_device *pdev,
+			const struct of_device_id *st_thermal_of_match)
+{
+	struct st_thermal_sensor *sensor;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	const struct of_device_id *match;
+
+	int polling_delay;
+	int ret;
+
+	if (!np) {
+		dev_err(dev, "device tree node not found\n");
+		return -EINVAL;
+	}
+
+	sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return -ENOMEM;
+
+	sensor->dev = dev;
+
+	match = of_match_device(st_thermal_of_match, dev);
+	if (!(match && match->data))
+		return -EINVAL;
+
+	sensor->cdata = match->data;
+	if (!sensor->cdata->ops)
+		return -EINVAL;
+
+	sensor->ops = sensor->cdata->ops;
+
+	ret = sensor->ops->regmap_init(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_alloc_regfields(sensor);
+	if (ret)
+		return ret;
+
+	sensor->clk = devm_clk_get(dev, "thermal");
+	if (IS_ERR(sensor->clk)) {
+		dev_err(dev, "failed to fetch clock\n");
+		return PTR_ERR(sensor->clk);
+	}
+
+	if (sensor->ops->register_enable_irq) {
+		ret = sensor->ops->register_enable_irq(sensor);
+		if (ret)
+			return ret;
+	}
+
+	ret = st_thermal_sensor_on(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_calibration(sensor);
+	if (ret)
+		goto sensor_off;
+
+	polling_delay = sensor->ops->register_enable_irq ? 0 : 1000;
+
+	sensor->thermal_dev =
+		thermal_zone_device_register(dev_name(dev), 1, 0, sensor,
+					     &st_tz_ops, NULL, 0, polling_delay);
+	if (IS_ERR(sensor->thermal_dev)) {
+		dev_err(dev, "failed to register thermal zone device\n");
+		ret = PTR_ERR(sensor->thermal_dev);
+		goto sensor_off;
+	}
+
+	platform_set_drvdata(pdev, sensor);
+
+	return 0;
+
+sensor_off:
+	st_thermal_sensor_off(sensor);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(st_thermal_register);
+
+int st_thermal_unregister(struct platform_device *pdev)
+{
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	st_thermal_sensor_off(sensor);
+	thermal_zone_device_unregister(sensor->thermal_dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(st_thermal_unregister);
+
+static int st_thermal_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	return st_thermal_sensor_off(sensor);
+}
+
+static int st_thermal_resume(struct device *dev)
+{
+	int ret;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	ret = st_thermal_sensor_on(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_calibration(sensor);
+	if (ret)
+		return ret;
+
+	if (sensor->ops->enable_irq) {
+		ret = sensor->ops->enable_irq(sensor);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+SIMPLE_DEV_PM_OPS(st_thermal_pm_ops, st_thermal_suspend, st_thermal_resume);
+EXPORT_SYMBOL_GPL(st_thermal_pm_ops);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/thermal/st/st_thermal.h b/drivers/thermal/st/st_thermal.h
new file mode 100644
index 0000000..fecafbe
--- /dev/null
+++ b/drivers/thermal/st/st_thermal.h
@@ -0,0 +1,104 @@
+/*
+ * ST Thermal Sensor Driver for STi series of SoCs
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __STI_THERMAL_SYSCFG_H
+#define __STI_THERMAL_SYSCFG_H
+
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/thermal.h>
+
+enum st_thermal_regfield_ids {
+	INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */
+	TEMP_PWR = 0,
+	DCORRECT,
+	OVERFLOW,
+	DATA,
+	INT_ENABLE,
+
+	MAX_REGFIELDS
+};
+
+/* Thermal sensor power states */
+enum st_thermal_power_state {
+	POWER_OFF = 0,
+	POWER_ON
+};
+
+struct st_thermal_sensor;
+
+/**
+ * Description of private thermal sensor ops.
+ *
+ * @power_ctrl:		Function for powering on/off a sensor. Clock to the
+ *			sensor is also controlled from this function.
+ * @alloc_regfields: 	Allocate regmap register fields, specific to a sensor.
+ * @do_memmap_regmap: 	Memory map the thermal register space and init regmap
+ *			instance or find regmap instance.
+ * @register_irq: 	Register an interrupt handler for a sensor.
+ */
+struct st_thermal_sensor_ops {
+	int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state);
+	int (*alloc_regfields)(struct st_thermal_sensor *);
+	int (*regmap_init)(struct st_thermal_sensor *);
+	int (*register_enable_irq)(struct st_thermal_sensor *);
+	int (*enable_irq)(struct st_thermal_sensor *);
+};
+
+/**
+ * Description of thermal driver compatible data.
+ *
+ * @reg_fields:		Pointer to the regfields array for a sensor.
+ * @sys_compat:		Pointer to the syscon node compatible string.
+ * @ops: 		Pointer to private thermal ops for a sensor.
+ * @calibration_val: 	Default calibration value to be written to the DCORRECT
+ *			register field for a sensor.
+ * @temp_adjust_val: 	Value to be added/subtracted from the data read from
+ *			the sensor. If value needs to be added please provide a
+ *			positive value and if it is to be subtracted please
+ * 			provide a negative value.
+ * @crit_temp: 		The temperature beyond which the SoC should be shutdown
+ * 			to prevent damage.
+ */
+struct st_thermal_compat_data {
+	char *sys_compat;
+	const struct reg_field *reg_fields;
+	const struct st_thermal_sensor_ops *ops;
+	unsigned int calibration_val;
+	int temp_adjust_val;
+	int crit_temp;
+};
+
+struct st_thermal_sensor {
+	struct device *dev;
+	struct thermal_zone_device *thermal_dev;
+	const struct st_thermal_sensor_ops *ops;
+	const struct st_thermal_compat_data *cdata;
+	struct clk *clk;
+	struct regmap *regmap;
+	struct regmap_field *pwr;
+	struct regmap_field *dcorrect;
+	struct regmap_field *overflow;
+	struct regmap_field *temp_data;
+	struct regmap_field *int_thresh_hi;
+	struct regmap_field *int_enable;
+	int irq;
+	void __iomem *mmio_base;
+};
+
+extern int st_thermal_register(struct platform_device *pdev,
+			       const struct of_device_id *st_thermal_of_match);
+extern int st_thermal_unregister(struct platform_device *pdev);
+extern const struct dev_pm_ops st_thermal_pm_ops;
+
+#endif /* __STI_RESET_SYSCFG_H */
diff --git a/drivers/thermal/st/st_thermal_memmap.c b/drivers/thermal/st/st_thermal_memmap.c
new file mode 100644
index 0000000..39896ce
--- /dev/null
+++ b/drivers/thermal/st/st_thermal_memmap.c
@@ -0,0 +1,209 @@
+/*
+ * ST Thermal Sensor Driver for memory mapped sensors.
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+
+#include "st_thermal.h"
+
+#define STIH416_MPE_CONF			0x0
+#define STIH416_MPE_STATUS			0x4
+#define STIH416_MPE_INT_THRESH			0x8
+#define STIH416_MPE_INT_EN			0xC
+
+/* Power control bits for the memory mapped thermal sensor */
+#define THERMAL_PDN				BIT(4)
+#define THERMAL_SRSTN				BIT(10)
+
+static const struct reg_field st_mmap_thermal_regfields[MAX_REGFIELDS] = {
+	/*
+	 * According to the STIH416 MPE temp sensor data sheet -
+	 * the PDN (Power Down Bit) and SRSTN (Soft Reset Bit) need to be
+	 * written simultaneously for powering on and off the temperature
+	 * sensor. regmap_update_bits() will be used to update the register.
+	 */
+	[INT_THRESH_HI]	= REG_FIELD(STIH416_MPE_INT_THRESH, 	0,  7),
+	[DCORRECT]	= REG_FIELD(STIH416_MPE_CONF,		5,  9),
+	[OVERFLOW]	= REG_FIELD(STIH416_MPE_STATUS,		9,  9),
+	[DATA]		= REG_FIELD(STIH416_MPE_STATUS,		11, 18),
+	[INT_ENABLE]	= REG_FIELD(STIH416_MPE_INT_EN,		0,  0),
+};
+
+static irqreturn_t st_mmap_thermal_trip_handler(int irq, void *sdata)
+{
+	struct st_thermal_sensor *sensor = sdata;
+
+	thermal_zone_device_update(sensor->thermal_dev);
+
+	return IRQ_HANDLED;
+}
+
+/* Private ops for the Memory Mapped based thermal sensors */
+static int st_mmap_power_ctrl(struct st_thermal_sensor *sensor,
+			      enum st_thermal_power_state power_state)
+{
+	const unsigned int mask = (THERMAL_PDN | THERMAL_SRSTN);
+	const unsigned int val = power_state ? mask : 0;
+
+	return regmap_update_bits(sensor->regmap, STIH416_MPE_CONF, mask, val);
+}
+
+static int st_mmap_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct regmap *regmap = sensor->regmap;
+	const struct reg_field *reg_fields = sensor->cdata->reg_fields;
+
+	sensor->int_thresh_hi = devm_regmap_field_alloc(dev, regmap,
+						reg_fields[INT_THRESH_HI]);
+	sensor->int_enable = devm_regmap_field_alloc(dev, regmap,
+						reg_fields[INT_ENABLE]);
+
+	if (IS_ERR(sensor->int_thresh_hi) || IS_ERR(sensor->int_enable)) {
+		dev_err(dev, "failed to alloc mmap regfields\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int st_mmap_enable_irq(struct st_thermal_sensor *sensor)
+{
+	int ret;
+
+	/* Set upper critical threshold */
+	ret = regmap_field_write(sensor->int_thresh_hi,
+				 sensor->cdata->crit_temp -
+				 sensor->cdata->temp_adjust_val);
+	if (ret)
+		return ret;
+
+	return regmap_field_write(sensor->int_enable, 1);
+}
+
+static int st_mmap_register_enable_irq(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	int ret;
+
+	sensor->irq = platform_get_irq(pdev, 0);
+	if (sensor->irq < 0) {
+		dev_err(dev, "failed to register IRQ\n");
+		return sensor->irq;
+	}
+
+	ret = devm_request_threaded_irq(dev, sensor->irq,
+					NULL, st_mmap_thermal_trip_handler,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					dev->driver->name, sensor);
+	if (ret) {
+		dev_err(dev, "failed to register IRQ %d\n", sensor->irq);
+		return ret;
+	}
+
+	return st_mmap_enable_irq(sensor);
+}
+
+static const struct regmap_config st_416mpe_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static int st_mmap_regmap_init(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "no memory resources defined\n");
+		return -ENODEV;
+	}
+
+	sensor->mmio_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(sensor->mmio_base)) {
+		dev_err(dev, "failed to remap IO\n");
+		return PTR_ERR(sensor->mmio_base);
+	}
+
+	sensor->regmap = devm_regmap_init_mmio(dev, sensor->mmio_base,
+				&st_416mpe_regmap_config);
+	if (IS_ERR(sensor->regmap)) {
+		dev_err(dev, "failed to initialise regmap\n");
+		return PTR_ERR(sensor->regmap);
+	}
+
+	return 0;
+}
+
+static const struct st_thermal_sensor_ops st_mmap_sensor_ops = {
+	.power_ctrl		= st_mmap_power_ctrl,
+	.alloc_regfields	= st_mmap_alloc_regfields,
+	.regmap_init		= st_mmap_regmap_init,
+	.register_enable_irq	= st_mmap_register_enable_irq,
+	.enable_irq		= st_mmap_enable_irq,
+};
+
+/* Compatible device data stih416 mpe thermal sensor */
+const struct st_thermal_compat_data st_416mpe_cdata = {
+	.reg_fields		= st_mmap_thermal_regfields,
+	.ops			= &st_mmap_sensor_ops,
+	.calibration_val	= 14,
+	.temp_adjust_val	= -95,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data stih407 thermal sensor */
+const struct st_thermal_compat_data st_407_cdata = {
+	.reg_fields		= st_mmap_thermal_regfields,
+	.ops			= &st_mmap_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= -95,
+	.crit_temp		= 120,
+};
+
+static struct of_device_id st_mmap_thermal_of_match[] = {
+	{ .compatible = "st,stih416-mpe-thermal", .data = &st_416mpe_cdata },
+	{ .compatible = "st,stih407-thermal",     .data = &st_407_cdata },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, st_mmap_thermal_of_match);
+
+int st_mmap_probe(struct platform_device *pdev)
+{
+	return st_thermal_register(pdev,  st_mmap_thermal_of_match);
+}
+
+int st_mmap_remove(struct platform_device *pdev)
+{
+	return st_thermal_unregister(pdev);
+}
+
+static struct platform_driver st_mmap_thermal_driver = {
+	.driver = {
+		.name	= "st_thermal_mmap",
+		.owner  = THIS_MODULE,
+		.pm     = &st_thermal_pm_ops,
+		.of_match_table = st_mmap_thermal_of_match,
+	},
+	.probe		= st_mmap_probe,
+	.remove		= st_mmap_remove,
+};
+
+module_platform_driver(st_mmap_thermal_driver);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/thermal/st/st_thermal_syscfg.c b/drivers/thermal/st/st_thermal_syscfg.c
new file mode 100644
index 0000000..888b58e
--- /dev/null
+++ b/drivers/thermal/st/st_thermal_syscfg.c
@@ -0,0 +1,179 @@
+/*
+ * ST Thermal Sensor Driver for syscfg based sensors.
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+
+#include "st_thermal.h"
+
+/* STiH415 */
+#define STIH415_SYSCFG_FRONT(num)		((num - 100) * 4)
+#define STIH415_SAS_THSENS_CONF			STIH415_SYSCFG_FRONT(178)
+#define STIH415_SAS_THSENS_STATUS		STIH415_SYSCFG_FRONT(198)
+#define STIH415_SYSCFG_MPE(num)			((num - 600) * 4)
+#define STIH415_MPE_THSENS_CONF			STIH415_SYSCFG_MPE(607)
+#define STIH415_MPE_THSENS_STATUS		STIH415_SYSCFG_MPE(667)
+
+/* STiH416 */
+#define STIH416_SYSCFG_FRONT(num)		((num - 1000) * 4)
+#define STIH416_SAS_THSENS_CONF			STIH416_SYSCFG_FRONT(1552)
+#define STIH416_SAS_THSENS_STATUS1		STIH416_SYSCFG_FRONT(1554)
+#define STIH416_SAS_THSENS_STATUS2		STIH416_SYSCFG_FRONT(1594)
+
+/* STiD127 */
+#define STID127_SYSCFG_CPU(num)			((num - 700) * 4)
+#define STID127_THSENS_CONF			STID127_SYSCFG_CPU(743)
+#define STID127_THSENS_STATUS			STID127_SYSCFG_CPU(767)
+
+static const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF,   9,  9),
+	[DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF,   4,  8),
+	[OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8,  8),
+	[DATA] 	   = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16),
+};
+
+static const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF,   8,  8),
+	[DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF,   3,  7),
+	[OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9,  9),
+	[DATA]     = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18),
+};
+
+static const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF,    9,  9),
+	[DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF,    4,  8),
+	[OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8,  8),
+	[DATA]     = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16),
+};
+
+static const struct reg_field st_127_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF,   7,  7),
+	[DCORRECT] = REG_FIELD(STID127_THSENS_CONF,   2,  6),
+	[OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9,  9),
+	[DATA]     = REG_FIELD(STID127_THSENS_STATUS, 11, 18),
+};
+
+/* Private OPs for System Configuration Register based thermal sensors */
+static int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor,
+				enum st_thermal_power_state power_state)
+{
+	return regmap_field_write(sensor->pwr, power_state);
+}
+
+static int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+
+	sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap,
+					sensor->cdata->reg_fields[TEMP_PWR]);
+
+	if (IS_ERR(sensor->pwr)) {
+		dev_err(dev, "failed to alloc syscfg regfields\n");
+		return PTR_ERR(sensor->pwr);
+	}
+
+	return 0;
+}
+
+static int st_syscfg_regmap_init(struct st_thermal_sensor *sensor)
+{
+	sensor->regmap =
+		syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat);
+	if (IS_ERR(sensor->regmap)) {
+		dev_err(sensor->dev, "failed to find syscfg regmap\n");
+		return PTR_ERR(sensor->regmap);
+	}
+
+	return 0;
+}
+
+static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = {
+	.power_ctrl		= st_syscfg_power_ctrl,
+	.alloc_regfields	= st_syscfg_alloc_regfields,
+	.regmap_init		= st_syscfg_regmap_init,
+};
+
+/* Compatible device data for stih415 sas thermal sensor */
+const struct st_thermal_compat_data st_415sas_cdata = {
+	.sys_compat		= "st,stih415-front-syscfg",
+	.reg_fields		= st_415sas_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= 20,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stih415 mpe thermal sensor */
+const struct st_thermal_compat_data st_415mpe_cdata = {
+	.sys_compat		= "st,stih415-system-syscfg",
+	.reg_fields		= st_415mpe_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= -103,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stih416 sas thermal sensor */
+const struct st_thermal_compat_data st_416sas_cdata = {
+	.sys_compat		= "st,stih416-front-syscfg",
+	.reg_fields		= st_416sas_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= 20,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stid127 thermal sensor */
+const struct st_thermal_compat_data st_127_cdata = {
+	.sys_compat		= "st,stid127-cpu-syscfg",
+	.reg_fields		= st_127_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 8,
+	.temp_adjust_val	= -103,
+	.crit_temp		= 120,
+};
+
+static struct of_device_id st_syscfg_thermal_of_match[] = {
+	{ .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata },
+	{ .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata },
+	{ .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata },
+	{ .compatible = "st,stid127-thermal",     .data = &st_127_cdata },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match);
+
+int st_syscfg_probe(struct platform_device *pdev)
+{
+	return st_thermal_register(pdev, st_syscfg_thermal_of_match);
+}
+
+int st_syscfg_remove(struct platform_device *pdev)
+{
+	return st_thermal_unregister(pdev);
+}
+
+static struct platform_driver st_syscfg_thermal_driver = {
+	.driver = {
+		.name	= "st_syscfg_thermal",
+		.owner  = THIS_MODULE,
+		.pm     = &st_thermal_pm_ops,
+		.of_match_table =  st_syscfg_thermal_of_match,
+	},
+	.probe		= st_syscfg_probe,
+	.remove		= st_syscfg_remove,
+};
+module_platform_driver(st_syscfg_thermal_driver);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <ajitpal.singh@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index 0419b69..4f485e8 100644
--- a/drivers/tty/ehv_bytechan.c
+++ b/drivers/tty/ehv_bytechan.c
@@ -108,55 +108,23 @@
  *
  * The byte channel to be used for the console is specified via a "stdout"
  * property in the /chosen node.
- *
- * For compatible with legacy device trees, we also look for a "stdout" alias.
  */
 static int find_console_handle(void)
 {
-	struct device_node *np, *np2;
+	struct device_node *np = of_stdout;
 	const char *sprop = NULL;
 	const uint32_t *iprop;
 
-	np = of_find_node_by_path("/chosen");
-	if (np)
-		sprop = of_get_property(np, "stdout-path", NULL);
-
-	if (!np || !sprop) {
-		of_node_put(np);
-		np = of_find_node_by_name(NULL, "aliases");
-		if (np)
-			sprop = of_get_property(np, "stdout", NULL);
-	}
-
-	if (!sprop) {
-		of_node_put(np);
-		return 0;
-	}
-
 	/* We don't care what the aliased node is actually called.  We only
 	 * care if it's compatible with "epapr,hv-byte-channel", because that
-	 * indicates that it's a byte channel node.  We use a temporary
-	 * variable, 'np2', because we can't release 'np' until we're done with
-	 * 'sprop'.
+	 * indicates that it's a byte channel node.
 	 */
-	np2 = of_find_node_by_path(sprop);
-	of_node_put(np);
-	np = np2;
-	if (!np) {
-		pr_warning("ehv-bc: stdout node '%s' does not exist\n", sprop);
+	if (!np || !of_device_is_compatible(np, "epapr,hv-byte-channel"))
 		return 0;
-	}
-
-	/* Is it a byte channel? */
-	if (!of_device_is_compatible(np, "epapr,hv-byte-channel")) {
-		of_node_put(np);
-		return 0;
-	}
 
 	stdout_irq = irq_of_parse_and_map(np, 0);
 	if (stdout_irq == NO_IRQ) {
-		pr_err("ehv-bc: no 'interrupts' property in %s node\n", sprop);
-		of_node_put(np);
+		pr_err("ehv-bc: no 'interrupts' property in %s node\n", np->full_name);
 		return 0;
 	}
 
@@ -167,12 +135,9 @@
 	if (!iprop) {
 		pr_err("ehv-bc: no 'hv-handle' property in %s node\n",
 		       np->name);
-		of_node_put(np);
 		return 0;
 	}
 	stdout_bc = be32_to_cpu(*iprop);
-
-	of_node_put(np);
 	return 1;
 }
 
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index a585079..a2cc5f8 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -342,22 +342,13 @@
 
 void __init hvc_opal_init_early(void)
 {
-	struct device_node *stdout_node = NULL;
+	struct device_node *stdout_node = of_node_get(of_stdout);
 	const __be32 *termno;
-	const char *name = NULL;
 	const struct hv_ops *ops;
 	u32 index;
 
-	/* find the boot console from /chosen/stdout */
-	if (of_chosen)
-		name = of_get_property(of_chosen, "linux,stdout-path", NULL);
-	if (name) {
-		stdout_node = of_find_node_by_path(name);
-		if (!stdout_node) {
-			pr_err("hvc_opal: Failed to locate default console!\n");
-			return;
-		}
-	} else {
+	/* If the console wasn't in /chosen, try /ibm,opal */
+	if (!stdout_node) {
 		struct device_node *opal, *np;
 
 		/* Current OPAL takeover doesn't provide the stdout
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index b594abf..5618b5f 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -404,42 +404,35 @@
 
 void __init hvc_vio_init_early(void)
 {
-	struct device_node *stdout_node;
 	const __be32 *termno;
 	const char *name;
 	const struct hv_ops *ops;
 
 	/* find the boot console from /chosen/stdout */
-	if (!of_chosen)
+	if (!of_stdout)
 		return;
-	name = of_get_property(of_chosen, "linux,stdout-path", NULL);
-	if (name == NULL)
-		return;
-	stdout_node = of_find_node_by_path(name);
-	if (!stdout_node)
-		return;
-	name = of_get_property(stdout_node, "name", NULL);
+	name = of_get_property(of_stdout, "name", NULL);
 	if (!name) {
 		printk(KERN_WARNING "stdout node missing 'name' property!\n");
-		goto out;
+		return;
 	}
 
 	/* Check if it's a virtual terminal */
 	if (strncmp(name, "vty", 3) != 0)
-		goto out;
-	termno = of_get_property(stdout_node, "reg", NULL);
+		return;
+	termno = of_get_property(of_stdout, "reg", NULL);
 	if (termno == NULL)
-		goto out;
+		return;
 	hvterm_priv0.termno = of_read_number(termno, 1);
 	spin_lock_init(&hvterm_priv0.buf_lock);
 	hvterm_privs[0] = &hvterm_priv0;
 
 	/* Check the protocol */
-	if (of_device_is_compatible(stdout_node, "hvterm1")) {
+	if (of_device_is_compatible(of_stdout, "hvterm1")) {
 		hvterm_priv0.proto = HV_PROTOCOL_RAW;
 		ops = &hvterm_raw_ops;
 	}
-	else if (of_device_is_compatible(stdout_node, "hvterm-protocol")) {
+	else if (of_device_is_compatible(of_stdout, "hvterm-protocol")) {
 		hvterm_priv0.proto = HV_PROTOCOL_HVSI;
 		ops = &hvterm_hvsi_ops;
 		hvsilib_init(&hvterm_priv0.hvsi, hvc_get_chars, hvc_put_chars,
@@ -447,7 +440,7 @@
 		/* HVSI, perform the handshake now */
 		hvsilib_establish(&hvterm_priv0.hvsi);
 	} else
-		goto out;
+		return;
 	udbg_putc = udbg_hvc_putc;
 	udbg_getc = udbg_hvc_getc;
 	udbg_getc_poll = udbg_hvc_getc_poll;
@@ -456,14 +449,12 @@
 	 * backend for HVSI, only do udbg
 	 */
 	if (hvterm_priv0.proto == HV_PROTOCOL_HVSI)
-		goto out;
+		return;
 #endif
 	/* Check whether the user has requested a different console. */
 	if (!strstr(cmd_line, "console="))
 		add_preferred_console("hvc", 0, NULL);
 	hvc_instantiate(0, 0, ops);
-out:
-	of_node_put(stdout_node);
 }
 
 /* call this from early_init() for a working debug console on
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index f7ad5b9..abbfedb 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1653,8 +1653,7 @@
 	/*
 	 * Find all escc chips in the system
 	 */
-	node_p = of_find_node_by_name(NULL, "escc");
-	while (node_p) {
+	for_each_node_by_name(node_p, "escc") {
 		/*
 		 * First get channel A/B node pointers
 		 * 
@@ -1672,7 +1671,7 @@
 			of_node_put(node_b);
 			printk(KERN_ERR "pmac_zilog: missing node %c for escc %s\n",
 				(!node_a) ? 'a' : 'b', node_p->full_name);
-			goto next;
+			continue;
 		}
 
 		/*
@@ -1699,11 +1698,9 @@
 			of_node_put(node_b);
 			memset(&pmz_ports[count], 0, sizeof(struct uart_pmac_port));
 			memset(&pmz_ports[count+1], 0, sizeof(struct uart_pmac_port));
-			goto next;
+			continue;
 		}
 		count += 2;
-next:
-		node_p = of_find_node_by_name(node_p, "escc");
 	}
 	pmz_ports_count = count;
 
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 8bb19da..29a7be4 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -26,6 +26,7 @@
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/console.h>
+#include <linux/of.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/device.h>
@@ -2611,6 +2612,8 @@
 		spin_lock_init(&uport->lock);
 		lockdep_set_class(&uport->lock, &port_lock_key);
 	}
+	if (uport->cons && uport->dev)
+		of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
 
 	uart_configure_port(drv, state, uport);
 
diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index af7b204..d8c5763 100644
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -8,11 +8,17 @@
 	depends on VFIO && SPAPR_TCE_IOMMU
 	default n
 
+config VFIO_SPAPR_EEH
+	tristate
+	depends on EEH && VFIO_IOMMU_SPAPR_TCE
+	default n
+
 menuconfig VFIO
 	tristate "VFIO Non-Privileged userspace driver framework"
 	depends on IOMMU_API
 	select VFIO_IOMMU_TYPE1 if X86
 	select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
+	select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)
 	select ANON_INODES
 	help
 	  VFIO provides a framework for secure userspace device drivers.
diff --git a/drivers/vfio/Makefile b/drivers/vfio/Makefile
index 50e30bc..0b035b1 100644
--- a/drivers/vfio/Makefile
+++ b/drivers/vfio/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_VFIO) += vfio.o
 obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o
 obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o
-obj-$(CONFIG_EEH) += vfio_spapr_eeh.o
+obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spapr_eeh.o
 obj-$(CONFIG_VFIO_PCI) += pci/
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index e2ee80f..f782533 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -37,6 +37,10 @@
 MODULE_PARM_DESC(nointxmask,
 		  "Disable support for PCI 2.3 style INTx masking.  If this resolves problems for specific devices, report lspci -vvvxxx to linux-pci@vger.kernel.org so the device can be fixed automatically via the broken_intx_masking flag.");
 
+static DEFINE_MUTEX(driver_lock);
+
+static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev);
+
 static int vfio_pci_enable(struct vfio_pci_device *vdev)
 {
 	struct pci_dev *pdev = vdev->pdev;
@@ -44,6 +48,9 @@
 	u16 cmd;
 	u8 msix_pos;
 
+	/* Don't allow our initial saved state to include busmaster */
+	pci_clear_master(pdev);
+
 	ret = pci_enable_device(pdev);
 	if (ret)
 		return ret;
@@ -99,7 +106,8 @@
 	struct pci_dev *pdev = vdev->pdev;
 	int bar;
 
-	pci_disable_device(pdev);
+	/* Stop the device from further DMA */
+	pci_clear_master(pdev);
 
 	vfio_pci_set_irqs_ioctl(vdev, VFIO_IRQ_SET_DATA_NONE |
 				VFIO_IRQ_SET_ACTION_TRIGGER,
@@ -117,6 +125,8 @@
 		vdev->barmap[bar] = NULL;
 	}
 
+	vdev->needs_reset = true;
+
 	/*
 	 * If we have saved state, restore it.  If we can reset the device,
 	 * even better.  Resetting with current state seems better than
@@ -128,7 +138,7 @@
 			__func__, dev_name(&pdev->dev));
 
 		if (!vdev->reset_works)
-			return;
+			goto out;
 
 		pci_save_state(pdev);
 	}
@@ -148,46 +158,55 @@
 		if (ret)
 			pr_warn("%s: Failed to reset device %s (%d)\n",
 				__func__, dev_name(&pdev->dev), ret);
+		else
+			vdev->needs_reset = false;
 	}
 
 	pci_restore_state(pdev);
+out:
+	pci_disable_device(pdev);
+
+	vfio_pci_try_bus_reset(vdev);
 }
 
 static void vfio_pci_release(void *device_data)
 {
 	struct vfio_pci_device *vdev = device_data;
 
-	if (atomic_dec_and_test(&vdev->refcnt)) {
+	mutex_lock(&driver_lock);
+
+	if (!(--vdev->refcnt)) {
 		vfio_spapr_pci_eeh_release(vdev->pdev);
 		vfio_pci_disable(vdev);
 	}
 
+	mutex_unlock(&driver_lock);
+
 	module_put(THIS_MODULE);
 }
 
 static int vfio_pci_open(void *device_data)
 {
 	struct vfio_pci_device *vdev = device_data;
-	int ret;
+	int ret = 0;
 
 	if (!try_module_get(THIS_MODULE))
 		return -ENODEV;
 
-	if (atomic_inc_return(&vdev->refcnt) == 1) {
+	mutex_lock(&driver_lock);
+
+	if (!vdev->refcnt) {
 		ret = vfio_pci_enable(vdev);
 		if (ret)
 			goto error;
 
-		ret = vfio_spapr_pci_eeh_open(vdev->pdev);
-		if (ret) {
-			vfio_pci_disable(vdev);
-			goto error;
-		}
+		vfio_spapr_pci_eeh_open(vdev->pdev);
 	}
-
-	return 0;
+	vdev->refcnt++;
 error:
-	module_put(THIS_MODULE);
+	mutex_unlock(&driver_lock);
+	if (ret)
+		module_put(THIS_MODULE);
 	return ret;
 }
 
@@ -843,7 +862,6 @@
 	vdev->irq_type = VFIO_PCI_NUM_IRQS;
 	mutex_init(&vdev->igate);
 	spin_lock_init(&vdev->irqlock);
-	atomic_set(&vdev->refcnt, 0);
 
 	ret = vfio_add_group_dev(&pdev->dev, &vfio_pci_ops, vdev);
 	if (ret) {
@@ -858,12 +876,15 @@
 {
 	struct vfio_pci_device *vdev;
 
-	vdev = vfio_del_group_dev(&pdev->dev);
-	if (!vdev)
-		return;
+	mutex_lock(&driver_lock);
 
-	iommu_group_put(pdev->dev.iommu_group);
-	kfree(vdev);
+	vdev = vfio_del_group_dev(&pdev->dev);
+	if (vdev) {
+		iommu_group_put(pdev->dev.iommu_group);
+		kfree(vdev);
+	}
+
+	mutex_unlock(&driver_lock);
 }
 
 static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
@@ -906,6 +927,110 @@
 	.err_handler	= &vfio_err_handlers,
 };
 
+/*
+ * Test whether a reset is necessary and possible.  We mark devices as
+ * needs_reset when they are released, but don't have a function-local reset
+ * available.  If any of these exist in the affected devices, we want to do
+ * a bus/slot reset.  We also need all of the affected devices to be unused,
+ * so we abort if any device has a non-zero refcnt.  driver_lock prevents a
+ * device from being opened during the scan or unbound from vfio-pci.
+ */
+static int vfio_pci_test_bus_reset(struct pci_dev *pdev, void *data)
+{
+	bool *needs_reset = data;
+	struct pci_driver *pci_drv = ACCESS_ONCE(pdev->driver);
+	int ret = -EBUSY;
+
+	if (pci_drv == &vfio_pci_driver) {
+		struct vfio_device *device;
+		struct vfio_pci_device *vdev;
+
+		device = vfio_device_get_from_dev(&pdev->dev);
+		if (!device)
+			return ret;
+
+		vdev = vfio_device_data(device);
+		if (vdev) {
+			if (vdev->needs_reset)
+				*needs_reset = true;
+
+			if (!vdev->refcnt)
+				ret = 0;
+		}
+
+		vfio_device_put(device);
+	}
+
+	/*
+	 * TODO: vfio-core considers groups to be viable even if some devices
+	 * are attached to known drivers, like pci-stub or pcieport.  We can't
+	 * freeze devices from being unbound to those drivers like we can
+	 * here though, so it would be racy to test for them.  We also can't
+	 * use device_lock() to prevent changes as that would interfere with
+	 * PCI-core taking device_lock during bus reset.  For now, we require
+	 * devices to be bound to vfio-pci to get a bus/slot reset on release.
+	 */
+
+	return ret;
+}
+
+/* Clear needs_reset on all affected devices after successful bus/slot reset */
+static int vfio_pci_clear_needs_reset(struct pci_dev *pdev, void *data)
+{
+	struct pci_driver *pci_drv = ACCESS_ONCE(pdev->driver);
+
+	if (pci_drv == &vfio_pci_driver) {
+		struct vfio_device *device;
+		struct vfio_pci_device *vdev;
+
+		device = vfio_device_get_from_dev(&pdev->dev);
+		if (!device)
+			return 0;
+
+		vdev = vfio_device_data(device);
+		if (vdev)
+			vdev->needs_reset = false;
+
+		vfio_device_put(device);
+	}
+
+	return 0;
+}
+
+/*
+ * Attempt to do a bus/slot reset if there are devices affected by a reset for
+ * this device that are needs_reset and all of the affected devices are unused
+ * (!refcnt).  Callers of this function are required to hold driver_lock such
+ * that devices can not be unbound from vfio-pci or opened by a user while we
+ * test for and perform a bus/slot reset.
+ */
+static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev)
+{
+	bool needs_reset = false, slot = false;
+	int ret;
+
+	if (!pci_probe_reset_slot(vdev->pdev->slot))
+		slot = true;
+	else if (pci_probe_reset_bus(vdev->pdev->bus))
+		return;
+
+	if (vfio_pci_for_each_slot_or_bus(vdev->pdev,
+					  vfio_pci_test_bus_reset,
+					  &needs_reset, slot) || !needs_reset)
+		return;
+
+	if (slot)
+		ret = pci_try_reset_slot(vdev->pdev->slot);
+	else
+		ret = pci_try_reset_bus(vdev->pdev->bus);
+
+	if (ret)
+		return;
+
+	vfio_pci_for_each_slot_or_bus(vdev->pdev,
+				      vfio_pci_clear_needs_reset, NULL, slot);
+}
+
 static void __exit vfio_pci_cleanup(void)
 {
 	pci_unregister_driver(&vfio_pci_driver);
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index 9c6d5d0..671c17a 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -54,8 +54,9 @@
 	bool			extended_caps;
 	bool			bardirty;
 	bool			has_vga;
+	bool			needs_reset;
 	struct pci_saved_state	*pci_saved_state;
-	atomic_t		refcnt;
+	int			refcnt;
 	struct eventfd_ctx	*err_trigger;
 };
 
diff --git a/drivers/vfio/vfio_spapr_eeh.c b/drivers/vfio/vfio_spapr_eeh.c
index f834b4c..86dfceb 100644
--- a/drivers/vfio/vfio_spapr_eeh.c
+++ b/drivers/vfio/vfio_spapr_eeh.c
@@ -9,20 +9,27 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/module.h>
 #include <linux/uaccess.h>
 #include <linux/vfio.h>
 #include <asm/eeh.h>
 
+#define DRIVER_VERSION	"0.1"
+#define DRIVER_AUTHOR	"Gavin Shan, IBM Corporation"
+#define DRIVER_DESC	"VFIO IOMMU SPAPR EEH"
+
 /* We might build address mapping here for "fast" path later */
-int vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
+void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
 {
-	return eeh_dev_open(pdev);
+	eeh_dev_open(pdev);
 }
+EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);
 
 void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
 {
 	eeh_dev_release(pdev);
 }
+EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_release);
 
 long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
 				unsigned int cmd, unsigned long arg)
@@ -85,3 +92,9 @@
 
 	return ret;
 }
+EXPORT_SYMBOL(vfio_spapr_iommu_eeh_ioctl);
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/fs/Makefile b/fs/Makefile
index 4030cbf..90c8852 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -11,7 +11,7 @@
 		attr.o bad_inode.o file.o filesystems.o namespace.o \
 		seq_file.o xattr.o libfs.o fs-writeback.o \
 		pnode.o splice.o sync.o utimes.o \
-		stack.o fs_struct.o statfs.o
+		stack.o fs_struct.o statfs.o fs_pin.o
 
 ifeq ($(CONFIG_BLOCK),y)
 obj-y +=	buffer.o block_dev.o direct-io.o mpage.o
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 7c93953..afd2b44 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -218,8 +218,9 @@
 	return -EIO;
 }
 
-static int bad_inode_rename (struct inode *old_dir, struct dentry *old_dentry,
-		struct inode *new_dir, struct dentry *new_dentry)
+static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
+			     struct inode *new_dir, struct dentry *new_dentry,
+			     unsigned int flags)
 {
 	return -EIO;
 }
@@ -279,7 +280,7 @@
 	.mkdir		= bad_inode_mkdir,
 	.rmdir		= bad_inode_rmdir,
 	.mknod		= bad_inode_mknod,
-	.rename		= bad_inode_rename,
+	.rename2	= bad_inode_rename2,
 	.readlink	= bad_inode_readlink,
 	/* follow_link must be no-op, otherwise unmounting this inode
 	   won't work */
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3668048..3183742 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8476,6 +8476,16 @@
 	return ret;
 }
 
+static int btrfs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+			 struct inode *new_dir, struct dentry *new_dentry,
+			 unsigned int flags)
+{
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
+
+	return btrfs_rename(old_dir, old_dentry, new_dir, new_dentry);
+}
+
 static void btrfs_run_delalloc_work(struct btrfs_work *work)
 {
 	struct btrfs_delalloc_work *delalloc_work;
@@ -9019,7 +9029,7 @@
 	.link		= btrfs_link,
 	.mkdir		= btrfs_mkdir,
 	.rmdir		= btrfs_rmdir,
-	.rename		= btrfs_rename,
+	.rename2	= btrfs_rename2,
 	.symlink	= btrfs_symlink,
 	.setattr	= btrfs_setattr,
 	.mknod		= btrfs_mknod,
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8e16bca..67b48b9 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -851,7 +851,6 @@
 	struct btrfs_path *path;
 	struct btrfs_key location;
 	struct inode *inode;
-	struct dentry *dentry;
 	u64 dir_id;
 	int new = 0;
 
@@ -922,13 +921,7 @@
 		return dget(sb->s_root);
 	}
 
-	dentry = d_obtain_alias(inode);
-	if (!IS_ERR(dentry)) {
-		spin_lock(&dentry->d_lock);
-		dentry->d_flags &= ~DCACHE_DISCONNECTED;
-		spin_unlock(&dentry->d_lock);
-	}
-	return dentry;
+	return d_obtain_root(inode);
 }
 
 static int btrfs_fill_super(struct super_block *sb,
diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index 469f2e8..cebf2eb 100644
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -172,14 +172,24 @@
 int ceph_init_acl(struct dentry *dentry, struct inode *inode, struct inode *dir)
 {
 	struct posix_acl *default_acl, *acl;
+	umode_t new_mode = inode->i_mode;
 	int error;
 
-	error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
+	error = posix_acl_create(dir, &new_mode, &default_acl, &acl);
 	if (error)
 		return error;
 
-	if (!default_acl && !acl)
+	if (!default_acl && !acl) {
 		cache_no_acl(inode);
+		if (new_mode != inode->i_mode) {
+			struct iattr newattrs = {
+				.ia_mode = new_mode,
+				.ia_valid = ATTR_MODE,
+			};
+			error = ceph_setattr(dentry, &newattrs);
+		}
+		return error;
+	}
 
 	if (default_acl) {
 		error = ceph_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 1fde164..6d1cd45 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3277,7 +3277,7 @@
 			rel->ino = cpu_to_le64(ceph_ino(inode));
 			rel->cap_id = cpu_to_le64(cap->cap_id);
 			rel->seq = cpu_to_le32(cap->seq);
-			rel->issue_seq = cpu_to_le32(cap->issue_seq),
+			rel->issue_seq = cpu_to_le32(cap->issue_seq);
 			rel->mseq = cpu_to_le32(cap->mseq);
 			rel->caps = cpu_to_le32(cap->implemented);
 			rel->wanted = cpu_to_le32(cap->mds_wanted);
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 3020851..2eb02f8 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -423,6 +423,9 @@
 	dout("sync_read on file %p %llu~%u %s\n", file, off,
 	     (unsigned)len,
 	     (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
+
+	if (!len)
+		return 0;
 	/*
 	 * flush any page cache pages in this range.  this
 	 * will make concurrent normal and sync io slow,
@@ -470,8 +473,11 @@
 			size_t left = ret;
 
 			while (left) {
-				int copy = min_t(size_t, PAGE_SIZE, left);
-				l = copy_page_to_iter(pages[k++], 0, copy, i);
+				size_t page_off = off & ~PAGE_MASK;
+				size_t copy = min_t(size_t,
+						    PAGE_SIZE - page_off, left);
+				l = copy_page_to_iter(pages[k++], page_off,
+						      copy, i);
 				off += l;
 				left -= l;
 				if (l < copy)
@@ -531,7 +537,7 @@
  * objects, rollback on failure, etc.)
  */
 static ssize_t
-ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from)
+ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
@@ -547,7 +553,6 @@
 	int check_caps = 0;
 	int ret;
 	struct timespec mtime = CURRENT_TIME;
-	loff_t pos = iocb->ki_pos;
 	size_t count = iov_iter_count(from);
 
 	if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
@@ -646,7 +651,8 @@
  * correct atomic write, we should e.g. take write locks on all
  * objects, rollback on failure, etc.)
  */
-static ssize_t ceph_sync_write(struct kiocb *iocb, struct iov_iter *from)
+static ssize_t
+ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
@@ -663,7 +669,6 @@
 	int check_caps = 0;
 	int ret;
 	struct timespec mtime = CURRENT_TIME;
-	loff_t pos = iocb->ki_pos;
 	size_t count = iov_iter_count(from);
 
 	if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
@@ -918,9 +923,9 @@
 		/* we might need to revert back to that point */
 		data = *from;
 		if (file->f_flags & O_DIRECT)
-			written = ceph_sync_direct_write(iocb, &data);
+			written = ceph_sync_direct_write(iocb, &data, pos);
 		else
-			written = ceph_sync_write(iocb, &data);
+			written = ceph_sync_write(iocb, &data, pos);
 		if (written == -EOLDSNAPC) {
 			dout("aio_write %p %llx.%llx %llu~%u"
 				"got EOLDSNAPC, retrying\n",
@@ -1177,6 +1182,9 @@
 	loff_t endoff = 0;
 	loff_t size;
 
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+		return -EOPNOTSUPP;
+
 	if (!S_ISREG(inode->i_mode))
 		return -EOPNOTSUPP;
 
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 92a2548..bad07c0 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1904,6 +1904,7 @@
 	     req->r_tid, ceph_mds_op_name(req->r_op), req->r_attempts);
 
 	if (req->r_got_unsafe) {
+		void *p;
 		/*
 		 * Replay.  Do not regenerate message (and rebuild
 		 * paths, etc.); just use the original message.
@@ -1924,8 +1925,13 @@
 
 		/* remove cap/dentry releases from message */
 		rhead->num_releases = 0;
-		msg->hdr.front_len = cpu_to_le32(req->r_request_release_offset);
-		msg->front.iov_len = req->r_request_release_offset;
+
+		/* time stamp */
+		p = msg->front.iov_base + req->r_request_release_offset;
+		ceph_encode_copy(&p, &req->r_stamp, sizeof(req->r_stamp));
+
+		msg->front.iov_len = p - msg->front.iov_base;
+		msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
 		return 0;
 	}
 
@@ -2061,11 +2067,12 @@
 static void kick_requests(struct ceph_mds_client *mdsc, int mds)
 {
 	struct ceph_mds_request *req;
-	struct rb_node *p;
+	struct rb_node *p = rb_first(&mdsc->request_tree);
 
 	dout("kick_requests mds%d\n", mds);
-	for (p = rb_first(&mdsc->request_tree); p; p = rb_next(p)) {
+	while (p) {
 		req = rb_entry(p, struct ceph_mds_request, r_node);
+		p = rb_next(p);
 		if (req->r_got_unsafe)
 			continue;
 		if (req->r_session &&
@@ -2248,6 +2255,7 @@
 	 */
 	if (result == -ESTALE) {
 		dout("got ESTALE on request %llu", req->r_tid);
+		req->r_resend_mds = -1;
 		if (req->r_direct_mode != USE_AUTH_MDS) {
 			dout("not using auth, setting for that now");
 			req->r_direct_mode = USE_AUTH_MDS;
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 06150fd..f6e1237 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -755,7 +755,7 @@
 				goto out;
 			}
 		} else {
-			root = d_obtain_alias(inode);
+			root = d_obtain_root(inode);
 		}
 		ceph_init_dentry(root);
 		dout("open_root_inode success, root dentry is %p\n", root);
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index c9c2b88..12f58d2 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -592,12 +592,12 @@
 		xattr_version = ci->i_xattrs.version;
 		spin_unlock(&ci->i_ceph_lock);
 
-		xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
+		xattrs = kcalloc(numattr, sizeof(struct ceph_inode_xattr *),
 				 GFP_NOFS);
 		err = -ENOMEM;
 		if (!xattrs)
 			goto bad_lock;
-		memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *));
+
 		for (i = 0; i < numattr; i++) {
 			xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr),
 					    GFP_NOFS);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 8883980..ac4f260 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -848,7 +848,7 @@
 	.link = cifs_hardlink,
 	.mkdir = cifs_mkdir,
 	.rmdir = cifs_rmdir,
-	.rename = cifs_rename,
+	.rename2 = cifs_rename2,
 	.permission = cifs_permission,
 /*	revalidate:cifs_revalidate,   */
 	.setattr = cifs_setattr,
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 5604802..b0fafa4 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -68,8 +68,8 @@
 extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
 extern int cifs_mkdir(struct inode *, struct dentry *, umode_t);
 extern int cifs_rmdir(struct inode *, struct dentry *);
-extern int cifs_rename(struct inode *, struct dentry *, struct inode *,
-		       struct dentry *);
+extern int cifs_rename2(struct inode *, struct dentry *, struct inode *,
+			struct dentry *, unsigned int);
 extern int cifs_revalidate_file_attr(struct file *filp);
 extern int cifs_revalidate_dentry_attr(struct dentry *);
 extern int cifs_revalidate_file(struct file *filp);
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 41de393..426d6c6 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1627,8 +1627,9 @@
 }
 
 int
-cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
-	    struct inode *target_dir, struct dentry *target_dentry)
+cifs_rename2(struct inode *source_dir, struct dentry *source_dentry,
+	     struct inode *target_dir, struct dentry *target_dentry,
+	     unsigned int flags)
 {
 	char *from_name = NULL;
 	char *to_name = NULL;
@@ -1640,6 +1641,9 @@
 	unsigned int xid;
 	int rc, tmprc;
 
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
+
 	cifs_sb = CIFS_SB(source_dir->i_sb);
 	tlink = cifs_sb_tlink(cifs_sb);
 	if (IS_ERR(tlink))
@@ -1667,6 +1671,12 @@
 	rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
 			    to_name);
 
+	/*
+	 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
+	 */
+	if (flags & RENAME_NOREPLACE)
+		goto cifs_rename_exit;
+
 	if (rc == -EEXIST && tcon->unix_ext) {
 		/*
 		 * Are src and dst hardlinks of same inode? We can only tell
diff --git a/fs/dcache.c b/fs/dcache.c
index 06f6585..d30ce69 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -731,8 +731,6 @@
 /**
  * d_find_alias - grab a hashed alias of inode
  * @inode: inode in question
- * @want_discon:  flag, used by d_splice_alias, to request
- *          that only a DISCONNECTED alias be returned.
  *
  * If inode has a hashed alias, or is a directory and has any alias,
  * acquire the reference to alias and return it. Otherwise return NULL.
@@ -741,10 +739,9 @@
  * of a filesystem.
  *
  * If the inode has an IS_ROOT, DCACHE_DISCONNECTED alias, then prefer
- * any other hashed alias over that one unless @want_discon is set,
- * in which case only return an IS_ROOT, DCACHE_DISCONNECTED alias.
+ * any other hashed alias over that one.
  */
-static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
+static struct dentry *__d_find_alias(struct inode *inode)
 {
 	struct dentry *alias, *discon_alias;
 
@@ -756,7 +753,7 @@
 			if (IS_ROOT(alias) &&
 			    (alias->d_flags & DCACHE_DISCONNECTED)) {
 				discon_alias = alias;
-			} else if (!want_discon) {
+			} else {
 				__dget_dlock(alias);
 				spin_unlock(&alias->d_lock);
 				return alias;
@@ -768,12 +765,9 @@
 		alias = discon_alias;
 		spin_lock(&alias->d_lock);
 		if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
-			if (IS_ROOT(alias) &&
-			    (alias->d_flags & DCACHE_DISCONNECTED)) {
-				__dget_dlock(alias);
-				spin_unlock(&alias->d_lock);
-				return alias;
-			}
+			__dget_dlock(alias);
+			spin_unlock(&alias->d_lock);
+			return alias;
 		}
 		spin_unlock(&alias->d_lock);
 		goto again;
@@ -787,7 +781,7 @@
 
 	if (!hlist_empty(&inode->i_dentry)) {
 		spin_lock(&inode->i_lock);
-		de = __d_find_alias(inode, 0);
+		de = __d_find_alias(inode);
 		spin_unlock(&inode->i_lock);
 	}
 	return de;
@@ -1781,25 +1775,7 @@
 }
 EXPORT_SYMBOL(d_find_any_alias);
 
-/**
- * d_obtain_alias - find or allocate a dentry for a given inode
- * @inode: inode to allocate the dentry for
- *
- * Obtain a dentry for an inode resulting from NFS filehandle conversion or
- * similar open by handle operations.  The returned dentry may be anonymous,
- * or may have a full name (if the inode was already in the cache).
- *
- * When called on a directory inode, we must ensure that the inode only ever
- * has one dentry.  If a dentry is found, that is returned instead of
- * allocating a new one.
- *
- * On successful return, the reference to the inode has been transferred
- * to the dentry.  In case of an error the reference on the inode is released.
- * To make it easier to use in export operations a %NULL or IS_ERR inode may
- * be passed in and will be the error will be propagate to the return value,
- * with a %NULL @inode replaced by ERR_PTR(-ESTALE).
- */
-struct dentry *d_obtain_alias(struct inode *inode)
+static struct dentry *__d_obtain_alias(struct inode *inode, int disconnected)
 {
 	static const struct qstr anonstring = QSTR_INIT("/", 1);
 	struct dentry *tmp;
@@ -1830,7 +1806,10 @@
 	}
 
 	/* attach a disconnected dentry */
-	add_flags = d_flags_for_inode(inode) | DCACHE_DISCONNECTED;
+	add_flags = d_flags_for_inode(inode);
+
+	if (disconnected)
+		add_flags |= DCACHE_DISCONNECTED;
 
 	spin_lock(&tmp->d_lock);
 	tmp->d_inode = inode;
@@ -1851,59 +1830,51 @@
 	iput(inode);
 	return res;
 }
+
+/**
+ * d_obtain_alias - find or allocate a DISCONNECTED dentry for a given inode
+ * @inode: inode to allocate the dentry for
+ *
+ * Obtain a dentry for an inode resulting from NFS filehandle conversion or
+ * similar open by handle operations.  The returned dentry may be anonymous,
+ * or may have a full name (if the inode was already in the cache).
+ *
+ * When called on a directory inode, we must ensure that the inode only ever
+ * has one dentry.  If a dentry is found, that is returned instead of
+ * allocating a new one.
+ *
+ * On successful return, the reference to the inode has been transferred
+ * to the dentry.  In case of an error the reference on the inode is released.
+ * To make it easier to use in export operations a %NULL or IS_ERR inode may
+ * be passed in and the error will be propagated to the return value,
+ * with a %NULL @inode replaced by ERR_PTR(-ESTALE).
+ */
+struct dentry *d_obtain_alias(struct inode *inode)
+{
+	return __d_obtain_alias(inode, 1);
+}
 EXPORT_SYMBOL(d_obtain_alias);
 
 /**
- * d_splice_alias - splice a disconnected dentry into the tree if one exists
- * @inode:  the inode which may have a disconnected dentry
- * @dentry: a negative dentry which we want to point to the inode.
+ * d_obtain_root - find or allocate a dentry for a given inode
+ * @inode: inode to allocate the dentry for
  *
- * If inode is a directory and has a 'disconnected' dentry (i.e. IS_ROOT and
- * DCACHE_DISCONNECTED), then d_move that in place of the given dentry
- * and return it, else simply d_add the inode to the dentry and return NULL.
+ * Obtain an IS_ROOT dentry for the root of a filesystem.
  *
- * This is needed in the lookup routine of any filesystem that is exportable
- * (via knfsd) so that we can build dcache paths to directories effectively.
+ * We must ensure that directory inodes only ever have one dentry.  If a
+ * dentry is found, that is returned instead of allocating a new one.
  *
- * If a dentry was found and moved, then it is returned.  Otherwise NULL
- * is returned.  This matches the expected return value of ->lookup.
- *
- * Cluster filesystems may call this function with a negative, hashed dentry.
- * In that case, we know that the inode will be a regular file, and also this
- * will only occur during atomic_open. So we need to check for the dentry
- * being already hashed only in the final case.
+ * On successful return, the reference to the inode has been transferred
+ * to the dentry.  In case of an error the reference on the inode is
+ * released.  A %NULL or IS_ERR inode may be passed in and will be the
+ * error will be propagate to the return value, with a %NULL @inode
+ * replaced by ERR_PTR(-ESTALE).
  */
-struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
+struct dentry *d_obtain_root(struct inode *inode)
 {
-	struct dentry *new = NULL;
-
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-
-	if (inode && S_ISDIR(inode->i_mode)) {
-		spin_lock(&inode->i_lock);
-		new = __d_find_alias(inode, 1);
-		if (new) {
-			BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED));
-			spin_unlock(&inode->i_lock);
-			security_d_instantiate(new, inode);
-			d_move(new, dentry);
-			iput(inode);
-		} else {
-			/* already taking inode->i_lock, so d_add() by hand */
-			__d_instantiate(dentry, inode);
-			spin_unlock(&inode->i_lock);
-			security_d_instantiate(dentry, inode);
-			d_rehash(dentry);
-		}
-	} else {
-		d_instantiate(dentry, inode);
-		if (d_unhashed(dentry))
-			d_rehash(dentry);
-	}
-	return new;
+	return __d_obtain_alias(inode, 0);
 }
-EXPORT_SYMBOL(d_splice_alias);
+EXPORT_SYMBOL(d_obtain_root);
 
 /**
  * d_add_ci - lookup or allocate new dentry with case-exact name
@@ -2697,6 +2668,75 @@
 }
 
 /**
+ * d_splice_alias - splice a disconnected dentry into the tree if one exists
+ * @inode:  the inode which may have a disconnected dentry
+ * @dentry: a negative dentry which we want to point to the inode.
+ *
+ * If inode is a directory and has an IS_ROOT alias, then d_move that in
+ * place of the given dentry and return it, else simply d_add the inode
+ * to the dentry and return NULL.
+ *
+ * If a non-IS_ROOT directory is found, the filesystem is corrupt, and
+ * we should error out: directories can't have multiple aliases.
+ *
+ * This is needed in the lookup routine of any filesystem that is exportable
+ * (via knfsd) so that we can build dcache paths to directories effectively.
+ *
+ * If a dentry was found and moved, then it is returned.  Otherwise NULL
+ * is returned.  This matches the expected return value of ->lookup.
+ *
+ * Cluster filesystems may call this function with a negative, hashed dentry.
+ * In that case, we know that the inode will be a regular file, and also this
+ * will only occur during atomic_open. So we need to check for the dentry
+ * being already hashed only in the final case.
+ */
+struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
+{
+	struct dentry *new = NULL;
+
+	if (IS_ERR(inode))
+		return ERR_CAST(inode);
+
+	if (inode && S_ISDIR(inode->i_mode)) {
+		spin_lock(&inode->i_lock);
+		new = __d_find_any_alias(inode);
+		if (new) {
+			if (!IS_ROOT(new)) {
+				spin_unlock(&inode->i_lock);
+				dput(new);
+				return ERR_PTR(-EIO);
+			}
+			if (d_ancestor(new, dentry)) {
+				spin_unlock(&inode->i_lock);
+				dput(new);
+				return ERR_PTR(-EIO);
+			}
+			write_seqlock(&rename_lock);
+			__d_materialise_dentry(dentry, new);
+			write_sequnlock(&rename_lock);
+			__d_drop(new);
+			_d_rehash(new);
+			spin_unlock(&new->d_lock);
+			spin_unlock(&inode->i_lock);
+			security_d_instantiate(new, inode);
+			iput(inode);
+		} else {
+			/* already taking inode->i_lock, so d_add() by hand */
+			__d_instantiate(dentry, inode);
+			spin_unlock(&inode->i_lock);
+			security_d_instantiate(dentry, inode);
+			d_rehash(dentry);
+		}
+	} else {
+		d_instantiate(dentry, inode);
+		if (d_unhashed(dentry))
+			d_rehash(dentry);
+	}
+	return new;
+}
+EXPORT_SYMBOL(d_splice_alias);
+
+/**
  * d_materialise_unique - introduce an inode into the tree
  * @dentry: candidate dentry
  * @inode: inode to bind to the dentry, to which aliases may be attached
@@ -2724,7 +2764,7 @@
 		struct dentry *alias;
 
 		/* Does an aliased dentry already exist? */
-		alias = __d_find_alias(inode, 0);
+		alias = __d_find_alias(inode);
 		if (alias) {
 			actual = alias;
 			write_seqlock(&rename_lock);
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 17e39b0..c311640 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -158,7 +158,7 @@
 {
 	ssize_t ret;
 
-	ret = iov_iter_get_pages(sdio->iter, dio->pages, DIO_PAGES * PAGE_SIZE,
+	ret = iov_iter_get_pages(sdio->iter, dio->pages, DIO_PAGES,
 				&sdio->from);
 
 	if (ret < 0 && sdio->blocks_available && (dio->rw & WRITE)) {
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 3750031..b88edc0 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -161,7 +161,7 @@
 static struct inode *ext2_alloc_inode(struct super_block *sb)
 {
 	struct ext2_inode_info *ei;
-	ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL);
+	ei = kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL);
 	if (!ei)
 		return NULL;
 	ei->i_block_alloc_info = NULL;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 3520ab8..b147a67 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3455,7 +3455,6 @@
 	.rmdir		= ext4_rmdir,
 	.mknod		= ext4_mknod,
 	.tmpfile	= ext4_tmpfile,
-	.rename		= ext4_rename,
 	.rename2	= ext4_rename2,
 	.setattr	= ext4_setattr,
 	.setxattr	= generic_setxattr,
diff --git a/fs/fs_pin.c b/fs/fs_pin.c
new file mode 100644
index 0000000..9368236
--- /dev/null
+++ b/fs/fs_pin.c
@@ -0,0 +1,78 @@
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/fs_pin.h>
+#include "internal.h"
+#include "mount.h"
+
+static void pin_free_rcu(struct rcu_head *head)
+{
+	kfree(container_of(head, struct fs_pin, rcu));
+}
+
+static DEFINE_SPINLOCK(pin_lock);
+
+void pin_put(struct fs_pin *p)
+{
+	if (atomic_long_dec_and_test(&p->count))
+		call_rcu(&p->rcu, pin_free_rcu);
+}
+
+void pin_remove(struct fs_pin *pin)
+{
+	spin_lock(&pin_lock);
+	hlist_del(&pin->m_list);
+	hlist_del(&pin->s_list);
+	spin_unlock(&pin_lock);
+}
+
+void pin_insert(struct fs_pin *pin, struct vfsmount *m)
+{
+	spin_lock(&pin_lock);
+	hlist_add_head(&pin->s_list, &m->mnt_sb->s_pins);
+	hlist_add_head(&pin->m_list, &real_mount(m)->mnt_pins);
+	spin_unlock(&pin_lock);
+}
+
+void mnt_pin_kill(struct mount *m)
+{
+	while (1) {
+		struct hlist_node *p;
+		struct fs_pin *pin;
+		rcu_read_lock();
+		p = ACCESS_ONCE(m->mnt_pins.first);
+		if (!p) {
+			rcu_read_unlock();
+			break;
+		}
+		pin = hlist_entry(p, struct fs_pin, m_list);
+		if (!atomic_long_inc_not_zero(&pin->count)) {
+			rcu_read_unlock();
+			cpu_relax();
+			continue;
+		}
+		rcu_read_unlock();
+		pin->kill(pin);
+	}
+}
+
+void sb_pin_kill(struct super_block *sb)
+{
+	while (1) {
+		struct hlist_node *p;
+		struct fs_pin *pin;
+		rcu_read_lock();
+		p = ACCESS_ONCE(sb->s_pins.first);
+		if (!p) {
+			rcu_read_unlock();
+			break;
+		}
+		pin = hlist_entry(p, struct fs_pin, s_list);
+		if (!atomic_long_inc_not_zero(&pin->count)) {
+			rcu_read_unlock();
+			cpu_relax();
+			continue;
+		}
+		rcu_read_unlock();
+		pin->kill(pin);
+	}
+}
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 0c60482..de1d84a 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -845,12 +845,6 @@
 	return err;
 }
 
-static int fuse_rename(struct inode *olddir, struct dentry *oldent,
-		       struct inode *newdir, struct dentry *newent)
-{
-	return fuse_rename2(olddir, oldent, newdir, newent, 0);
-}
-
 static int fuse_link(struct dentry *entry, struct inode *newdir,
 		     struct dentry *newent)
 {
@@ -2024,7 +2018,6 @@
 	.symlink	= fuse_symlink,
 	.unlink		= fuse_unlink,
 	.rmdir		= fuse_rmdir,
-	.rename		= fuse_rename,
 	.rename2	= fuse_rename2,
 	.link		= fuse_link,
 	.setattr	= fuse_setattr,
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 40ac262..912061a 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1303,10 +1303,10 @@
 	while (nbytes < *nbytesp && req->num_pages < req->max_pages) {
 		unsigned npages;
 		size_t start;
-		unsigned n = req->max_pages - req->num_pages;
 		ssize_t ret = iov_iter_get_pages(ii,
 					&req->pages[req->num_pages],
-					n * PAGE_SIZE, &start);
+					req->max_pages - req->num_pages,
+					&start);
 		if (ret < 0)
 			return ret;
 
diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 9c88da0..4fcd40d 100644
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -89,6 +89,7 @@
 extern int link_file(const char *from, const char *to);
 extern int hostfs_do_readlink(char *file, char *buf, int size);
 extern int rename_file(char *from, char *to);
+extern int rename2_file(char *from, char *to, unsigned int flags);
 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 		     long long *bfree_out, long long *bavail_out,
 		     long long *files_out, long long *ffree_out,
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index bb529f3..fd62cae 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -741,21 +741,31 @@
 	return err;
 }
 
-static int hostfs_rename(struct inode *from_ino, struct dentry *from,
-			 struct inode *to_ino, struct dentry *to)
+static int hostfs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+			  struct inode *new_dir, struct dentry *new_dentry,
+			  unsigned int flags)
 {
-	char *from_name, *to_name;
+	char *old_name, *new_name;
 	int err;
 
-	if ((from_name = dentry_name(from)) == NULL)
+	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+		return -EINVAL;
+
+	old_name = dentry_name(old_dentry);
+	if (old_name == NULL)
 		return -ENOMEM;
-	if ((to_name = dentry_name(to)) == NULL) {
-		__putname(from_name);
+	new_name = dentry_name(new_dentry);
+	if (new_name == NULL) {
+		__putname(old_name);
 		return -ENOMEM;
 	}
-	err = rename_file(from_name, to_name);
-	__putname(from_name);
-	__putname(to_name);
+	if (!flags)
+		err = rename_file(old_name, new_name);
+	else
+		err = rename2_file(old_name, new_name, flags);
+
+	__putname(old_name);
+	__putname(new_name);
 	return err;
 }
 
@@ -867,7 +877,7 @@
 	.mkdir		= hostfs_mkdir,
 	.rmdir		= hostfs_rmdir,
 	.mknod		= hostfs_mknod,
-	.rename		= hostfs_rename,
+	.rename2	= hostfs_rename2,
 	.permission	= hostfs_permission,
 	.setattr	= hostfs_setattr,
 };
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index 67838f3..9765dab 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -14,6 +14,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/vfs.h>
+#include <sys/syscall.h>
 #include "hostfs.h"
 #include <utime.h>
 
@@ -360,6 +361,33 @@
 	return 0;
 }
 
+int rename2_file(char *from, char *to, unsigned int flags)
+{
+	int err;
+
+#ifndef SYS_renameat2
+#  ifdef __x86_64__
+#    define SYS_renameat2 316
+#  endif
+#  ifdef __i386__
+#    define SYS_renameat2 353
+#  endif
+#endif
+
+#ifdef SYS_renameat2
+	err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags);
+	if (err < 0) {
+		if (errno != ENOSYS)
+			return -errno;
+		else
+			return -EINVAL;
+	}
+	return 0;
+#else
+	return -EINVAL;
+#endif
+}
+
 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 	      long long *bfree_out, long long *bavail_out,
 	      long long *files_out, long long *ffree_out,
diff --git a/fs/internal.h b/fs/internal.h
index 4657424..e325b4f 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -131,7 +131,6 @@
 /*
  * read_write.c
  */
-extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 
 /*
@@ -144,3 +143,9 @@
  * pipe.c
  */
 extern const struct file_operations pipefifo_fops;
+
+/*
+ * fs_pin.c
+ */
+extern void sb_pin_kill(struct super_block *sb);
+extern void mnt_pin_kill(struct mount *m);
diff --git a/fs/mount.h b/fs/mount.h
index d55297f..6740a62 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -55,7 +55,7 @@
 	int mnt_id;			/* mount identifier */
 	int mnt_group_id;		/* peer group identifier */
 	int mnt_expiry_mark;		/* true if marked for expiry */
-	int mnt_pinned;
+	struct hlist_head mnt_pins;
 	struct path mnt_ex_mountpoint;
 };
 
diff --git a/fs/namei.c b/fs/namei.c
index 9eb787e..a996bb4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1091,10 +1091,10 @@
 }
 EXPORT_SYMBOL(follow_down_one);
 
-static inline bool managed_dentry_might_block(struct dentry *dentry)
+static inline int managed_dentry_rcu(struct dentry *dentry)
 {
-	return (dentry->d_flags & DCACHE_MANAGE_TRANSIT &&
-		dentry->d_op->d_manage(dentry, true) < 0);
+	return (dentry->d_flags & DCACHE_MANAGE_TRANSIT) ?
+		dentry->d_op->d_manage(dentry, true) : 0;
 }
 
 /*
@@ -1110,11 +1110,18 @@
 		 * Don't forget we might have a non-mountpoint managed dentry
 		 * that wants to block transit.
 		 */
-		if (unlikely(managed_dentry_might_block(path->dentry)))
+		switch (managed_dentry_rcu(path->dentry)) {
+		case -ECHILD:
+		default:
 			return false;
+		case -EISDIR:
+			return true;
+		case 0:
+			break;
+		}
 
 		if (!d_mountpoint(path->dentry))
-			return true;
+			return !(path->dentry->d_flags & DCACHE_NEED_AUTOMOUNT);
 
 		mounted = __lookup_mnt(path->mnt, path->dentry);
 		if (!mounted)
@@ -1130,7 +1137,8 @@
 		 */
 		*inode = path->dentry->d_inode;
 	}
-	return read_seqretry(&mount_lock, nd->m_seq);
+	return read_seqretry(&mount_lock, nd->m_seq) &&
+		!(path->dentry->d_flags & DCACHE_NEED_AUTOMOUNT);
 }
 
 static int follow_dotdot_rcu(struct nameidata *nd)
@@ -1402,11 +1410,8 @@
 		}
 		path->mnt = mnt;
 		path->dentry = dentry;
-		if (unlikely(!__follow_mount_rcu(nd, path, inode)))
-			goto unlazy;
-		if (unlikely(path->dentry->d_flags & DCACHE_NEED_AUTOMOUNT))
-			goto unlazy;
-		return 0;
+		if (likely(__follow_mount_rcu(nd, path, inode)))
+			return 0;
 unlazy:
 		if (unlazy_walk(nd, dentry))
 			return -ECHILD;
@@ -4019,7 +4024,7 @@
  * The worst of all namespace operations - renaming directory. "Perverted"
  * doesn't even start to describe it. Somebody in UCB had a heck of a trip...
  * Problems:
- *	a) we can get into loop creation. Check is done in is_subdir().
+ *	a) we can get into loop creation.
  *	b) race potential - two innocent renames can create a loop together.
  *	   That's where 4.4 screws up. Current fix: serialization on
  *	   sb->s_vfs_rename_mutex. We might be more accurate, but that's another
@@ -4075,7 +4080,7 @@
 	if (error)
 		return error;
 
-	if (!old_dir->i_op->rename)
+	if (!old_dir->i_op->rename && !old_dir->i_op->rename2)
 		return -EPERM;
 
 	if (flags && !old_dir->i_op->rename2)
@@ -4134,10 +4139,11 @@
 		if (error)
 			goto out;
 	}
-	if (!flags) {
+	if (!old_dir->i_op->rename2) {
 		error = old_dir->i_op->rename(old_dir, old_dentry,
 					      new_dir, new_dentry);
 	} else {
+		WARN_ON(old_dir->i_op->rename != NULL);
 		error = old_dir->i_op->rename2(old_dir, old_dentry,
 					       new_dir, new_dentry, flags);
 	}
diff --git a/fs/namespace.c b/fs/namespace.c
index 0acabea..a01c773 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -16,7 +16,6 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 #include <linux/idr.h>
-#include <linux/acct.h>		/* acct_auto_close_mnt */
 #include <linux/init.h>		/* init_rootfs */
 #include <linux/fs_struct.h>	/* get_fs_root et.al. */
 #include <linux/fsnotify.h>	/* fsnotify_vfsmount_delete */
@@ -779,6 +778,20 @@
 	list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
 }
 
+static void attach_shadowed(struct mount *mnt,
+			struct mount *parent,
+			struct mount *shadows)
+{
+	if (shadows) {
+		hlist_add_behind_rcu(&mnt->mnt_hash, &shadows->mnt_hash);
+		list_add(&mnt->mnt_child, &shadows->mnt_child);
+	} else {
+		hlist_add_head_rcu(&mnt->mnt_hash,
+				m_hash(&parent->mnt, mnt->mnt_mountpoint));
+		list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
+	}
+}
+
 /*
  * vfsmount lock must be held for write
  */
@@ -797,12 +810,7 @@
 
 	list_splice(&head, n->list.prev);
 
-	if (shadows)
-		hlist_add_behind_rcu(&mnt->mnt_hash, &shadows->mnt_hash);
-	else
-		hlist_add_head_rcu(&mnt->mnt_hash,
-				m_hash(&parent->mnt, mnt->mnt_mountpoint));
-	list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
+	attach_shadowed(mnt, parent, shadows);
 	touch_mnt_namespace(n);
 }
 
@@ -951,7 +959,6 @@
 
 static void mntput_no_expire(struct mount *mnt)
 {
-put_again:
 	rcu_read_lock();
 	mnt_add_count(mnt, -1);
 	if (likely(mnt->mnt_ns)) { /* shouldn't be the last one */
@@ -964,14 +971,6 @@
 		unlock_mount_hash();
 		return;
 	}
-	if (unlikely(mnt->mnt_pinned)) {
-		mnt_add_count(mnt, mnt->mnt_pinned + 1);
-		mnt->mnt_pinned = 0;
-		rcu_read_unlock();
-		unlock_mount_hash();
-		acct_auto_close_mnt(&mnt->mnt);
-		goto put_again;
-	}
 	if (unlikely(mnt->mnt.mnt_flags & MNT_DOOMED)) {
 		rcu_read_unlock();
 		unlock_mount_hash();
@@ -994,6 +993,8 @@
 	 * so mnt_get_writers() below is safe.
 	 */
 	WARN_ON(mnt_get_writers(mnt));
+	if (unlikely(mnt->mnt_pins.first))
+		mnt_pin_kill(mnt);
 	fsnotify_vfsmount_delete(&mnt->mnt);
 	dput(mnt->mnt.mnt_root);
 	deactivate_super(mnt->mnt.mnt_sb);
@@ -1021,25 +1022,15 @@
 }
 EXPORT_SYMBOL(mntget);
 
-void mnt_pin(struct vfsmount *mnt)
+struct vfsmount *mnt_clone_internal(struct path *path)
 {
-	lock_mount_hash();
-	real_mount(mnt)->mnt_pinned++;
-	unlock_mount_hash();
+	struct mount *p;
+	p = clone_mnt(real_mount(path->mnt), path->dentry, CL_PRIVATE);
+	if (IS_ERR(p))
+		return ERR_CAST(p);
+	p->mnt.mnt_flags |= MNT_INTERNAL;
+	return &p->mnt;
 }
-EXPORT_SYMBOL(mnt_pin);
-
-void mnt_unpin(struct vfsmount *m)
-{
-	struct mount *mnt = real_mount(m);
-	lock_mount_hash();
-	if (mnt->mnt_pinned) {
-		mnt_add_count(mnt, 1);
-		mnt->mnt_pinned--;
-	}
-	unlock_mount_hash();
-}
-EXPORT_SYMBOL(mnt_unpin);
 
 static inline void mangle(struct seq_file *m, const char *s)
 {
@@ -1505,6 +1496,7 @@
 			continue;
 
 		for (s = r; s; s = next_mnt(s, r)) {
+			struct mount *t = NULL;
 			if (!(flag & CL_COPY_UNBINDABLE) &&
 			    IS_MNT_UNBINDABLE(s)) {
 				s = skip_mnt_tree(s);
@@ -1526,7 +1518,14 @@
 				goto out;
 			lock_mount_hash();
 			list_add_tail(&q->mnt_list, &res->mnt_list);
-			attach_mnt(q, parent, p->mnt_mp);
+			mnt_set_mountpoint(parent, p->mnt_mp, q);
+			if (!list_empty(&parent->mnt_mounts)) {
+				t = list_last_entry(&parent->mnt_mounts,
+					struct mount, mnt_child);
+				if (t->mnt_mp != p->mnt_mp)
+					t = NULL;
+			}
+			attach_shadowed(q, parent, t);
 			unlock_mount_hash();
 		}
 	}
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 9b431f4..cbb1797 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -210,8 +210,7 @@
 			SetPageUptodate(bvec->bv_page);
 
 	if (err) {
-		struct nfs_pgio_data *rdata = par->data;
-		struct nfs_pgio_header *header = rdata->header;
+		struct nfs_pgio_header *header = par->data;
 
 		if (!header->pnfs_error)
 			header->pnfs_error = -EIO;
@@ -224,43 +223,44 @@
 static void bl_read_cleanup(struct work_struct *work)
 {
 	struct rpc_task *task;
-	struct nfs_pgio_data *rdata;
+	struct nfs_pgio_header *hdr;
 	dprintk("%s enter\n", __func__);
 	task = container_of(work, struct rpc_task, u.tk_work);
-	rdata = container_of(task, struct nfs_pgio_data, task);
-	pnfs_ld_read_done(rdata);
+	hdr = container_of(task, struct nfs_pgio_header, task);
+	pnfs_ld_read_done(hdr);
 }
 
 static void
 bl_end_par_io_read(void *data, int unused)
 {
-	struct nfs_pgio_data *rdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	rdata->task.tk_status = rdata->header->pnfs_error;
-	INIT_WORK(&rdata->task.u.tk_work, bl_read_cleanup);
-	schedule_work(&rdata->task.u.tk_work);
+	hdr->task.tk_status = hdr->pnfs_error;
+	INIT_WORK(&hdr->task.u.tk_work, bl_read_cleanup);
+	schedule_work(&hdr->task.u.tk_work);
 }
 
 static enum pnfs_try_status
-bl_read_pagelist(struct nfs_pgio_data *rdata)
+bl_read_pagelist(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *header = rdata->header;
+	struct nfs_pgio_header *header = hdr;
 	int i, hole;
 	struct bio *bio = NULL;
 	struct pnfs_block_extent *be = NULL, *cow_read = NULL;
 	sector_t isect, extent_length = 0;
 	struct parallel_io *par;
-	loff_t f_offset = rdata->args.offset;
-	size_t bytes_left = rdata->args.count;
+	loff_t f_offset = hdr->args.offset;
+	size_t bytes_left = hdr->args.count;
 	unsigned int pg_offset, pg_len;
-	struct page **pages = rdata->args.pages;
-	int pg_index = rdata->args.pgbase >> PAGE_CACHE_SHIFT;
+	struct page **pages = hdr->args.pages;
+	int pg_index = hdr->args.pgbase >> PAGE_CACHE_SHIFT;
 	const bool is_dio = (header->dreq != NULL);
 
 	dprintk("%s enter nr_pages %u offset %lld count %u\n", __func__,
-	       rdata->pages.npages, f_offset, (unsigned int)rdata->args.count);
+		hdr->page_array.npages, f_offset,
+		(unsigned int)hdr->args.count);
 
-	par = alloc_parallel(rdata);
+	par = alloc_parallel(hdr);
 	if (!par)
 		goto use_mds;
 	par->pnfs_callback = bl_end_par_io_read;
@@ -268,7 +268,7 @@
 
 	isect = (sector_t) (f_offset >> SECTOR_SHIFT);
 	/* Code assumes extents are page-aligned */
-	for (i = pg_index; i < rdata->pages.npages; i++) {
+	for (i = pg_index; i < hdr->page_array.npages; i++) {
 		if (!extent_length) {
 			/* We've used up the previous extent */
 			bl_put_extent(be);
@@ -317,7 +317,8 @@
 			struct pnfs_block_extent *be_read;
 
 			be_read = (hole && cow_read) ? cow_read : be;
-			bio = do_add_page_to_bio(bio, rdata->pages.npages - i,
+			bio = do_add_page_to_bio(bio,
+						 hdr->page_array.npages - i,
 						 READ,
 						 isect, pages[i], be_read,
 						 bl_end_io_read, par,
@@ -332,10 +333,10 @@
 		extent_length -= PAGE_CACHE_SECTORS;
 	}
 	if ((isect << SECTOR_SHIFT) >= header->inode->i_size) {
-		rdata->res.eof = 1;
-		rdata->res.count = header->inode->i_size - rdata->args.offset;
+		hdr->res.eof = 1;
+		hdr->res.count = header->inode->i_size - hdr->args.offset;
 	} else {
-		rdata->res.count = (isect << SECTOR_SHIFT) - rdata->args.offset;
+		hdr->res.count = (isect << SECTOR_SHIFT) - hdr->args.offset;
 	}
 out:
 	bl_put_extent(be);
@@ -390,8 +391,7 @@
 	}
 
 	if (unlikely(err)) {
-		struct nfs_pgio_data *data = par->data;
-		struct nfs_pgio_header *header = data->header;
+		struct nfs_pgio_header *header = par->data;
 
 		if (!header->pnfs_error)
 			header->pnfs_error = -EIO;
@@ -405,8 +405,7 @@
 {
 	struct parallel_io *par = bio->bi_private;
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
-	struct nfs_pgio_data *data = par->data;
-	struct nfs_pgio_header *header = data->header;
+	struct nfs_pgio_header *header = par->data;
 
 	if (!uptodate) {
 		if (!header->pnfs_error)
@@ -423,32 +422,32 @@
 static void bl_write_cleanup(struct work_struct *work)
 {
 	struct rpc_task *task;
-	struct nfs_pgio_data *wdata;
+	struct nfs_pgio_header *hdr;
 	dprintk("%s enter\n", __func__);
 	task = container_of(work, struct rpc_task, u.tk_work);
-	wdata = container_of(task, struct nfs_pgio_data, task);
-	if (likely(!wdata->header->pnfs_error)) {
+	hdr = container_of(task, struct nfs_pgio_header, task);
+	if (likely(!hdr->pnfs_error)) {
 		/* Marks for LAYOUTCOMMIT */
-		mark_extents_written(BLK_LSEG2EXT(wdata->header->lseg),
-				     wdata->args.offset, wdata->args.count);
+		mark_extents_written(BLK_LSEG2EXT(hdr->lseg),
+				     hdr->args.offset, hdr->args.count);
 	}
-	pnfs_ld_write_done(wdata);
+	pnfs_ld_write_done(hdr);
 }
 
 /* Called when last of bios associated with a bl_write_pagelist call finishes */
 static void bl_end_par_io_write(void *data, int num_se)
 {
-	struct nfs_pgio_data *wdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	if (unlikely(wdata->header->pnfs_error)) {
-		bl_free_short_extents(&BLK_LSEG2EXT(wdata->header->lseg)->bl_inval,
+	if (unlikely(hdr->pnfs_error)) {
+		bl_free_short_extents(&BLK_LSEG2EXT(hdr->lseg)->bl_inval,
 					num_se);
 	}
 
-	wdata->task.tk_status = wdata->header->pnfs_error;
-	wdata->verf.committed = NFS_FILE_SYNC;
-	INIT_WORK(&wdata->task.u.tk_work, bl_write_cleanup);
-	schedule_work(&wdata->task.u.tk_work);
+	hdr->task.tk_status = hdr->pnfs_error;
+	hdr->verf.committed = NFS_FILE_SYNC;
+	INIT_WORK(&hdr->task.u.tk_work, bl_write_cleanup);
+	schedule_work(&hdr->task.u.tk_work);
 }
 
 /* FIXME STUB - mark intersection of layout and page as bad, so is not
@@ -673,18 +672,17 @@
 }
 
 static enum pnfs_try_status
-bl_write_pagelist(struct nfs_pgio_data *wdata, int sync)
+bl_write_pagelist(struct nfs_pgio_header *header, int sync)
 {
-	struct nfs_pgio_header *header = wdata->header;
 	int i, ret, npg_zero, pg_index, last = 0;
 	struct bio *bio = NULL;
 	struct pnfs_block_extent *be = NULL, *cow_read = NULL;
 	sector_t isect, last_isect = 0, extent_length = 0;
 	struct parallel_io *par = NULL;
-	loff_t offset = wdata->args.offset;
-	size_t count = wdata->args.count;
+	loff_t offset = header->args.offset;
+	size_t count = header->args.count;
 	unsigned int pg_offset, pg_len, saved_len;
-	struct page **pages = wdata->args.pages;
+	struct page **pages = header->args.pages;
 	struct page *page;
 	pgoff_t index;
 	u64 temp;
@@ -699,11 +697,11 @@
 		dprintk("pnfsblock nonblock aligned DIO writes. Resend MDS\n");
 		goto out_mds;
 	}
-	/* At this point, wdata->pages is a (sequential) list of nfs_pages.
+	/* At this point, header->page_aray is a (sequential) list of nfs_pages.
 	 * We want to write each, and if there is an error set pnfs_error
 	 * to have it redone using nfs.
 	 */
-	par = alloc_parallel(wdata);
+	par = alloc_parallel(header);
 	if (!par)
 		goto out_mds;
 	par->pnfs_callback = bl_end_par_io_write;
@@ -790,8 +788,8 @@
 	bio = bl_submit_bio(WRITE, bio);
 
 	/* Middle pages */
-	pg_index = wdata->args.pgbase >> PAGE_CACHE_SHIFT;
-	for (i = pg_index; i < wdata->pages.npages; i++) {
+	pg_index = header->args.pgbase >> PAGE_CACHE_SHIFT;
+	for (i = pg_index; i < header->page_array.npages; i++) {
 		if (!extent_length) {
 			/* We've used up the previous extent */
 			bl_put_extent(be);
@@ -862,7 +860,8 @@
 		}
 
 
-		bio = do_add_page_to_bio(bio, wdata->pages.npages - i, WRITE,
+		bio = do_add_page_to_bio(bio, header->page_array.npages - i,
+					 WRITE,
 					 isect, pages[i], be,
 					 bl_end_io_write, par,
 					 pg_offset, pg_len);
@@ -890,7 +889,7 @@
 	}
 
 write_done:
-	wdata->res.count = wdata->args.count;
+	header->res.count = header->args.count;
 out:
 	bl_put_extent(be);
 	bl_put_extent(cow_read);
@@ -1063,7 +1062,7 @@
 		return ERR_PTR(-ENOMEM);
 	}
 
-	pages = kzalloc(max_pages * sizeof(struct page *), GFP_NOFS);
+	pages = kcalloc(max_pages, sizeof(struct page *), GFP_NOFS);
 	if (pages == NULL) {
 		kfree(dev);
 		return ERR_PTR(-ENOMEM);
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 073b4cf..54de482 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -428,6 +428,18 @@
 	if (p == NULL)
 		return 0;
 
+	/*
+	 * Did we get the acceptor from userland during the SETCLIENID
+	 * negotiation?
+	 */
+	if (clp->cl_acceptor)
+		return !strcmp(p, clp->cl_acceptor);
+
+	/*
+	 * Otherwise try to verify it using the cl_hostname. Note that this
+	 * doesn't work if a non-canonical hostname was used in the devname.
+	 */
+
 	/* Expect a GSS_C_NT_HOSTBASED_NAME like "nfs@serverhostname" */
 
 	if (memcmp(p, "nfs@", 4) != 0)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 180d1ec..1c5ff6d 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -110,8 +110,8 @@
 		mutex_unlock(&nfs_version_mutex);
 	}
 
-	if (!IS_ERR(nfs))
-		try_module_get(nfs->owner);
+	if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
+		return ERR_PTR(-EAGAIN);
 	return nfs;
 }
 
@@ -158,7 +158,8 @@
 		goto error_0;
 
 	clp->cl_nfs_mod = cl_init->nfs_mod;
-	try_module_get(clp->cl_nfs_mod->owner);
+	if (!try_module_get(clp->cl_nfs_mod->owner))
+		goto error_dealloc;
 
 	clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
 
@@ -190,6 +191,7 @@
 
 error_cleanup:
 	put_nfs_version(clp->cl_nfs_mod);
+error_dealloc:
 	kfree(clp);
 error_0:
 	return ERR_PTR(err);
@@ -252,6 +254,7 @@
 	put_net(clp->cl_net);
 	put_nfs_version(clp->cl_nfs_mod);
 	kfree(clp->cl_hostname);
+	kfree(clp->cl_acceptor);
 	kfree(clp);
 
 	dprintk("<-- nfs_free_client()\n");
@@ -482,8 +485,13 @@
 	struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
 	const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
 
+	if (cl_init->hostname == NULL) {
+		WARN_ON(1);
+		return NULL;
+	}
+
 	dprintk("--> nfs_get_client(%s,v%u)\n",
-		cl_init->hostname ?: "", rpc_ops->version);
+		cl_init->hostname, rpc_ops->version);
 
 	/* see if the client already exists */
 	do {
@@ -510,7 +518,7 @@
 	} while (!IS_ERR(new));
 
 	dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
-		cl_init->hostname ?: "", PTR_ERR(new));
+		cl_init->hostname, PTR_ERR(new));
 	return new;
 }
 EXPORT_SYMBOL_GPL(nfs_get_client);
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 5d8ccec..5853f53 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -41,14 +41,8 @@
 	set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags);
 }
 
-/**
- * nfs_have_delegation - check if inode has a delegation
- * @inode: inode to check
- * @flags: delegation types to check for
- *
- * Returns one if inode has the indicated delegation, otherwise zero.
- */
-int nfs4_have_delegation(struct inode *inode, fmode_t flags)
+static int
+nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark)
 {
 	struct nfs_delegation *delegation;
 	int ret = 0;
@@ -58,12 +52,34 @@
 	delegation = rcu_dereference(NFS_I(inode)->delegation);
 	if (delegation != NULL && (delegation->type & flags) == flags &&
 	    !test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {
-		nfs_mark_delegation_referenced(delegation);
+		if (mark)
+			nfs_mark_delegation_referenced(delegation);
 		ret = 1;
 	}
 	rcu_read_unlock();
 	return ret;
 }
+/**
+ * nfs_have_delegation - check if inode has a delegation, mark it
+ * NFS_DELEGATION_REFERENCED if there is one.
+ * @inode: inode to check
+ * @flags: delegation types to check for
+ *
+ * Returns one if inode has the indicated delegation, otherwise zero.
+ */
+int nfs4_have_delegation(struct inode *inode, fmode_t flags)
+{
+	return nfs4_do_check_delegation(inode, flags, true);
+}
+
+/*
+ * nfs4_check_delegation - check if inode has a delegation, do not mark
+ * NFS_DELEGATION_REFERENCED if it has one.
+ */
+int nfs4_check_delegation(struct inode *inode, fmode_t flags)
+{
+	return nfs4_do_check_delegation(inode, flags, false);
+}
 
 static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
 {
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 9a79c7a..5c1cce3 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -59,6 +59,7 @@
 
 void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
 int nfs4_have_delegation(struct inode *inode, fmode_t flags);
+int nfs4_check_delegation(struct inode *inode, fmode_t flags);
 
 #endif
 
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 4a3d4ef..36d921f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -988,9 +988,13 @@
  * A check for whether or not the parent directory has changed.
  * In the case it has, we assume that the dentries are untrustworthy
  * and may need to be looked up again.
+ * If rcu_walk prevents us from performing a full check, return 0.
  */
-static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
+static int nfs_check_verifier(struct inode *dir, struct dentry *dentry,
+			      int rcu_walk)
 {
+	int ret;
+
 	if (IS_ROOT(dentry))
 		return 1;
 	if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONE)
@@ -998,7 +1002,11 @@
 	if (!nfs_verify_change_attribute(dir, dentry->d_time))
 		return 0;
 	/* Revalidate nfsi->cache_change_attribute before we declare a match */
-	if (nfs_revalidate_inode(NFS_SERVER(dir), dir) < 0)
+	if (rcu_walk)
+		ret = nfs_revalidate_inode_rcu(NFS_SERVER(dir), dir);
+	else
+		ret = nfs_revalidate_inode(NFS_SERVER(dir), dir);
+	if (ret < 0)
 		return 0;
 	if (!nfs_verify_change_attribute(dir, dentry->d_time))
 		return 0;
@@ -1042,6 +1050,8 @@
 out:
 	return (inode->i_nlink == 0) ? -ENOENT : 0;
 out_force:
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
 	ret = __nfs_revalidate_inode(server, inode);
 	if (ret != 0)
 		return ret;
@@ -1054,6 +1064,9 @@
  *
  * If parent mtime has changed, we revalidate, else we wait for a
  * period corresponding to the parent's attribute cache timeout value.
+ *
+ * If LOOKUP_RCU prevents us from performing a full check, return 1
+ * suggesting a reval is needed.
  */
 static inline
 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
@@ -1064,7 +1077,7 @@
 		return 0;
 	if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
 		return 1;
-	return !nfs_check_verifier(dir, dentry);
+	return !nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU);
 }
 
 /*
@@ -1088,21 +1101,30 @@
 	struct nfs4_label *label = NULL;
 	int error;
 
-	if (flags & LOOKUP_RCU)
-		return -ECHILD;
-
-	parent = dget_parent(dentry);
-	dir = parent->d_inode;
+	if (flags & LOOKUP_RCU) {
+		parent = ACCESS_ONCE(dentry->d_parent);
+		dir = ACCESS_ONCE(parent->d_inode);
+		if (!dir)
+			return -ECHILD;
+	} else {
+		parent = dget_parent(dentry);
+		dir = parent->d_inode;
+	}
 	nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
 	inode = dentry->d_inode;
 
 	if (!inode) {
-		if (nfs_neg_need_reval(dir, dentry, flags))
+		if (nfs_neg_need_reval(dir, dentry, flags)) {
+			if (flags & LOOKUP_RCU)
+				return -ECHILD;
 			goto out_bad;
+		}
 		goto out_valid_noent;
 	}
 
 	if (is_bad_inode(inode)) {
+		if (flags & LOOKUP_RCU)
+			return -ECHILD;
 		dfprintk(LOOKUPCACHE, "%s: %pd2 has dud inode\n",
 				__func__, dentry);
 		goto out_bad;
@@ -1112,12 +1134,20 @@
 		goto out_set_verifier;
 
 	/* Force a full look up iff the parent directory has changed */
-	if (!nfs_is_exclusive_create(dir, flags) && nfs_check_verifier(dir, dentry)) {
-		if (nfs_lookup_verify_inode(inode, flags))
+	if (!nfs_is_exclusive_create(dir, flags) &&
+	    nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU)) {
+
+		if (nfs_lookup_verify_inode(inode, flags)) {
+			if (flags & LOOKUP_RCU)
+				return -ECHILD;
 			goto out_zap_parent;
+		}
 		goto out_valid;
 	}
 
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
+
 	if (NFS_STALE(inode))
 		goto out_bad;
 
@@ -1153,13 +1183,18 @@
 	/* Success: notify readdir to use READDIRPLUS */
 	nfs_advise_use_readdirplus(dir);
  out_valid_noent:
-	dput(parent);
+	if (flags & LOOKUP_RCU) {
+		if (parent != ACCESS_ONCE(dentry->d_parent))
+			return -ECHILD;
+	} else
+		dput(parent);
 	dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is valid\n",
 			__func__, dentry);
 	return 1;
 out_zap_parent:
 	nfs_zap_caches(dir);
  out_bad:
+	WARN_ON(flags & LOOKUP_RCU);
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
 	nfs4_label_free(label);
@@ -1185,6 +1220,7 @@
 			__func__, dentry);
 	return 0;
 out_error:
+	WARN_ON(flags & LOOKUP_RCU);
 	nfs_free_fattr(fattr);
 	nfs_free_fhandle(fhandle);
 	nfs4_label_free(label);
@@ -1529,14 +1565,9 @@
 
 static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 {
-	struct dentry *parent = NULL;
 	struct inode *inode;
-	struct inode *dir;
 	int ret = 0;
 
-	if (flags & LOOKUP_RCU)
-		return -ECHILD;
-
 	if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY))
 		goto no_open;
 	if (d_mountpoint(dentry))
@@ -1545,34 +1576,47 @@
 		goto no_open;
 
 	inode = dentry->d_inode;
-	parent = dget_parent(dentry);
-	dir = parent->d_inode;
 
 	/* We can't create new files in nfs_open_revalidate(), so we
 	 * optimize away revalidation of negative dentries.
 	 */
 	if (inode == NULL) {
+		struct dentry *parent;
+		struct inode *dir;
+
+		if (flags & LOOKUP_RCU) {
+			parent = ACCESS_ONCE(dentry->d_parent);
+			dir = ACCESS_ONCE(parent->d_inode);
+			if (!dir)
+				return -ECHILD;
+		} else {
+			parent = dget_parent(dentry);
+			dir = parent->d_inode;
+		}
 		if (!nfs_neg_need_reval(dir, dentry, flags))
 			ret = 1;
+		else if (flags & LOOKUP_RCU)
+			ret = -ECHILD;
+		if (!(flags & LOOKUP_RCU))
+			dput(parent);
+		else if (parent != ACCESS_ONCE(dentry->d_parent))
+			return -ECHILD;
 		goto out;
 	}
 
 	/* NFS only supports OPEN on regular files */
 	if (!S_ISREG(inode->i_mode))
-		goto no_open_dput;
+		goto no_open;
 	/* We cannot do exclusive creation on a positive dentry */
 	if (flags & LOOKUP_EXCL)
-		goto no_open_dput;
+		goto no_open;
 
 	/* Let f_op->open() actually open (and revalidate) the file */
 	ret = 1;
 
 out:
-	dput(parent);
 	return ret;
 
-no_open_dput:
-	dput(parent);
 no_open:
 	return nfs_lookup_revalidate(dentry, flags);
 }
@@ -2028,10 +2072,14 @@
 static LIST_HEAD(nfs_access_lru_list);
 static atomic_long_t nfs_access_nr_entries;
 
+static unsigned long nfs_access_max_cachesize = ULONG_MAX;
+module_param(nfs_access_max_cachesize, ulong, 0644);
+MODULE_PARM_DESC(nfs_access_max_cachesize, "NFS access maximum total cache length");
+
 static void nfs_access_free_entry(struct nfs_access_entry *entry)
 {
 	put_rpccred(entry->cred);
-	kfree(entry);
+	kfree_rcu(entry, rcu_head);
 	smp_mb__before_atomic();
 	atomic_long_dec(&nfs_access_nr_entries);
 	smp_mb__after_atomic();
@@ -2048,19 +2096,14 @@
 	}
 }
 
-unsigned long
-nfs_access_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
+static unsigned long
+nfs_do_access_cache_scan(unsigned int nr_to_scan)
 {
 	LIST_HEAD(head);
 	struct nfs_inode *nfsi, *next;
 	struct nfs_access_entry *cache;
-	int nr_to_scan = sc->nr_to_scan;
-	gfp_t gfp_mask = sc->gfp_mask;
 	long freed = 0;
 
-	if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
-		return SHRINK_STOP;
-
 	spin_lock(&nfs_access_lru_lock);
 	list_for_each_entry_safe(nfsi, next, &nfs_access_lru_list, access_cache_inode_lru) {
 		struct inode *inode;
@@ -2094,11 +2137,39 @@
 }
 
 unsigned long
+nfs_access_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+	int nr_to_scan = sc->nr_to_scan;
+	gfp_t gfp_mask = sc->gfp_mask;
+
+	if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
+		return SHRINK_STOP;
+	return nfs_do_access_cache_scan(nr_to_scan);
+}
+
+
+unsigned long
 nfs_access_cache_count(struct shrinker *shrink, struct shrink_control *sc)
 {
 	return vfs_pressure_ratio(atomic_long_read(&nfs_access_nr_entries));
 }
 
+static void
+nfs_access_cache_enforce_limit(void)
+{
+	long nr_entries = atomic_long_read(&nfs_access_nr_entries);
+	unsigned long diff;
+	unsigned int nr_to_scan;
+
+	if (nr_entries < 0 || nr_entries <= nfs_access_max_cachesize)
+		return;
+	nr_to_scan = 100;
+	diff = nr_entries - nfs_access_max_cachesize;
+	if (diff < nr_to_scan)
+		nr_to_scan = diff;
+	nfs_do_access_cache_scan(nr_to_scan);
+}
+
 static void __nfs_access_zap_cache(struct nfs_inode *nfsi, struct list_head *head)
 {
 	struct rb_root *root_node = &nfsi->access_cache;
@@ -2186,6 +2257,38 @@
 	return -ENOENT;
 }
 
+static int nfs_access_get_cached_rcu(struct inode *inode, struct rpc_cred *cred, struct nfs_access_entry *res)
+{
+	/* Only check the most recently returned cache entry,
+	 * but do it without locking.
+	 */
+	struct nfs_inode *nfsi = NFS_I(inode);
+	struct nfs_access_entry *cache;
+	int err = -ECHILD;
+	struct list_head *lh;
+
+	rcu_read_lock();
+	if (nfsi->cache_validity & NFS_INO_INVALID_ACCESS)
+		goto out;
+	lh = rcu_dereference(nfsi->access_cache_entry_lru.prev);
+	cache = list_entry(lh, struct nfs_access_entry, lru);
+	if (lh == &nfsi->access_cache_entry_lru ||
+	    cred != cache->cred)
+		cache = NULL;
+	if (cache == NULL)
+		goto out;
+	if (!nfs_have_delegated_attributes(inode) &&
+	    !time_in_range_open(jiffies, cache->jiffies, cache->jiffies + nfsi->attrtimeo))
+		goto out;
+	res->jiffies = cache->jiffies;
+	res->cred = cache->cred;
+	res->mask = cache->mask;
+	err = 0;
+out:
+	rcu_read_unlock();
+	return err;
+}
+
 static void nfs_access_add_rbtree(struct inode *inode, struct nfs_access_entry *set)
 {
 	struct nfs_inode *nfsi = NFS_I(inode);
@@ -2229,6 +2332,11 @@
 	cache->cred = get_rpccred(set->cred);
 	cache->mask = set->mask;
 
+	/* The above field assignments must be visible
+	 * before this item appears on the lru.  We cannot easily
+	 * use rcu_assign_pointer, so just force the memory barrier.
+	 */
+	smp_wmb();
 	nfs_access_add_rbtree(inode, cache);
 
 	/* Update accounting */
@@ -2244,6 +2352,7 @@
 					&nfs_access_lru_list);
 		spin_unlock(&nfs_access_lru_lock);
 	}
+	nfs_access_cache_enforce_limit();
 }
 EXPORT_SYMBOL_GPL(nfs_access_add_cache);
 
@@ -2267,10 +2376,16 @@
 
 	trace_nfs_access_enter(inode);
 
-	status = nfs_access_get_cached(inode, cred, &cache);
+	status = nfs_access_get_cached_rcu(inode, cred, &cache);
+	if (status != 0)
+		status = nfs_access_get_cached(inode, cred, &cache);
 	if (status == 0)
 		goto out_cached;
 
+	status = -ECHILD;
+	if (mask & MAY_NOT_BLOCK)
+		goto out;
+
 	/* Be clever: ask server to check for all possible rights */
 	cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
 	cache.cred = cred;
@@ -2321,9 +2436,6 @@
 	struct rpc_cred *cred;
 	int res = 0;
 
-	if (mask & MAY_NOT_BLOCK)
-		return -ECHILD;
-
 	nfs_inc_stats(inode, NFSIOS_VFSACCESS);
 
 	if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
@@ -2350,12 +2462,23 @@
 	if (!NFS_PROTO(inode)->access)
 		goto out_notsup;
 
-	cred = rpc_lookup_cred();
-	if (!IS_ERR(cred)) {
-		res = nfs_do_access(inode, cred, mask);
-		put_rpccred(cred);
-	} else
+	/* Always try fast lookups first */
+	rcu_read_lock();
+	cred = rpc_lookup_cred_nonblock();
+	if (!IS_ERR(cred))
+		res = nfs_do_access(inode, cred, mask|MAY_NOT_BLOCK);
+	else
 		res = PTR_ERR(cred);
+	rcu_read_unlock();
+	if (res == -ECHILD && !(mask & MAY_NOT_BLOCK)) {
+		/* Fast lookup failed, try the slow way */
+		cred = rpc_lookup_cred();
+		if (!IS_ERR(cred)) {
+			res = nfs_do_access(inode, cred, mask);
+			put_rpccred(cred);
+		} else
+			res = PTR_ERR(cred);
+	}
 out:
 	if (!res && (mask & MAY_EXEC) && !execute_ok(inode))
 		res = -EACCES;
@@ -2364,6 +2487,9 @@
 		inode->i_sb->s_id, inode->i_ino, mask, res);
 	return res;
 out_notsup:
+	if (mask & MAY_NOT_BLOCK)
+		return -ECHILD;
+
 	res = nfs_revalidate_inode(NFS_SERVER(inode), inode);
 	if (res == 0)
 		res = generic_permission(inode, mask);
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index f11b9ee..65ef6e0 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -148,8 +148,8 @@
 {
 	struct nfs_writeverf *verfp;
 
-	verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
-				      hdr->data->ds_idx);
+	verfp = nfs_direct_select_verf(dreq, hdr->ds_clp,
+				      hdr->ds_idx);
 	WARN_ON_ONCE(verfp->committed >= 0);
 	memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf));
 	WARN_ON_ONCE(verfp->committed < 0);
@@ -169,8 +169,8 @@
 {
 	struct nfs_writeverf *verfp;
 
-	verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
-					 hdr->data->ds_idx);
+	verfp = nfs_direct_select_verf(dreq, hdr->ds_clp,
+					 hdr->ds_idx);
 	if (verfp->committed < 0) {
 		nfs_direct_set_hdr_verf(dreq, hdr);
 		return 0;
@@ -715,7 +715,7 @@
 {
 	struct nfs_direct_req *dreq = hdr->dreq;
 	struct nfs_commit_info cinfo;
-	int bit = -1;
+	bool request_commit = false;
 	struct nfs_page *req = nfs_list_entry(hdr->pages.next);
 
 	if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
@@ -729,27 +729,20 @@
 		dreq->flags = 0;
 		dreq->error = hdr->error;
 	}
-	if (dreq->error != 0)
-		bit = NFS_IOHDR_ERROR;
-	else {
+	if (dreq->error == 0) {
 		dreq->count += hdr->good_bytes;
-		if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) {
-			dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
-			bit = NFS_IOHDR_NEED_RESCHED;
-		} else if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) {
+		if (nfs_write_need_commit(hdr)) {
 			if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES)
-				bit = NFS_IOHDR_NEED_RESCHED;
+				request_commit = true;
 			else if (dreq->flags == 0) {
 				nfs_direct_set_hdr_verf(dreq, hdr);
-				bit = NFS_IOHDR_NEED_COMMIT;
+				request_commit = true;
 				dreq->flags = NFS_ODIRECT_DO_COMMIT;
 			} else if (dreq->flags == NFS_ODIRECT_DO_COMMIT) {
-				if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr)) {
+				request_commit = true;
+				if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr))
 					dreq->flags =
 						NFS_ODIRECT_RESCHED_WRITES;
-					bit = NFS_IOHDR_NEED_RESCHED;
-				} else
-					bit = NFS_IOHDR_NEED_COMMIT;
 			}
 		}
 	}
@@ -759,9 +752,7 @@
 
 		req = nfs_list_entry(hdr->pages.next);
 		nfs_list_remove_request(req);
-		switch (bit) {
-		case NFS_IOHDR_NEED_RESCHED:
-		case NFS_IOHDR_NEED_COMMIT:
+		if (request_commit) {
 			kref_get(&req->wb_kref);
 			nfs_mark_request_commit(req, hdr->lseg, &cinfo);
 		}
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index d2eba1c..1359c4a 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -84,45 +84,37 @@
 	BUG();
 }
 
-static void filelayout_reset_write(struct nfs_pgio_data *data)
+static void filelayout_reset_write(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-	struct rpc_task *task = &data->task;
+	struct rpc_task *task = &hdr->task;
 
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
 		dprintk("%s Reset task %5u for i/o through MDS "
 			"(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
-			data->task.tk_pid,
+			hdr->task.tk_pid,
 			hdr->inode->i_sb->s_id,
 			(unsigned long long)NFS_FILEID(hdr->inode),
-			data->args.count,
-			(unsigned long long)data->args.offset);
+			hdr->args.count,
+			(unsigned long long)hdr->args.offset);
 
-		task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
-							&hdr->pages,
-							hdr->completion_ops,
-							hdr->dreq);
+		task->tk_status = pnfs_write_done_resend_to_mds(hdr);
 	}
 }
 
-static void filelayout_reset_read(struct nfs_pgio_data *data)
+static void filelayout_reset_read(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-	struct rpc_task *task = &data->task;
+	struct rpc_task *task = &hdr->task;
 
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
 		dprintk("%s Reset task %5u for i/o through MDS "
 			"(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
-			data->task.tk_pid,
+			hdr->task.tk_pid,
 			hdr->inode->i_sb->s_id,
 			(unsigned long long)NFS_FILEID(hdr->inode),
-			data->args.count,
-			(unsigned long long)data->args.offset);
+			hdr->args.count,
+			(unsigned long long)hdr->args.offset);
 
-		task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
-							&hdr->pages,
-							hdr->completion_ops,
-							hdr->dreq);
+		task->tk_status = pnfs_read_done_resend_to_mds(hdr);
 	}
 }
 
@@ -243,18 +235,17 @@
 /* NFS_PROTO call done callback routines */
 
 static int filelayout_read_done_cb(struct rpc_task *task,
-				struct nfs_pgio_data *data)
+				struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
 	int err;
 
-	trace_nfs4_pnfs_read(data, task->tk_status);
-	err = filelayout_async_handle_error(task, data->args.context->state,
-					    data->ds_clp, hdr->lseg);
+	trace_nfs4_pnfs_read(hdr, task->tk_status);
+	err = filelayout_async_handle_error(task, hdr->args.context->state,
+					    hdr->ds_clp, hdr->lseg);
 
 	switch (err) {
 	case -NFS4ERR_RESET_TO_MDS:
-		filelayout_reset_read(data);
+		filelayout_reset_read(hdr);
 		return task->tk_status;
 	case -EAGAIN:
 		rpc_restart_call_prepare(task);
@@ -270,15 +261,14 @@
  * rfc5661 is not clear about which credential should be used.
  */
 static void
-filelayout_set_layoutcommit(struct nfs_pgio_data *wdata)
+filelayout_set_layoutcommit(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = wdata->header;
 
 	if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds ||
-	    wdata->res.verf->committed == NFS_FILE_SYNC)
+	    hdr->res.verf->committed == NFS_FILE_SYNC)
 		return;
 
-	pnfs_set_layoutcommit(wdata);
+	pnfs_set_layoutcommit(hdr);
 	dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
 		(unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
 }
@@ -305,83 +295,82 @@
  */
 static void filelayout_read_prepare(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *rdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	if (unlikely(test_bit(NFS_CONTEXT_BAD, &rdata->args.context->flags))) {
+	if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
 		rpc_exit(task, -EIO);
 		return;
 	}
-	if (filelayout_reset_to_mds(rdata->header->lseg)) {
+	if (filelayout_reset_to_mds(hdr->lseg)) {
 		dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
-		filelayout_reset_read(rdata);
+		filelayout_reset_read(hdr);
 		rpc_exit(task, 0);
 		return;
 	}
-	rdata->pgio_done_cb = filelayout_read_done_cb;
+	hdr->pgio_done_cb = filelayout_read_done_cb;
 
-	if (nfs41_setup_sequence(rdata->ds_clp->cl_session,
-			&rdata->args.seq_args,
-			&rdata->res.seq_res,
+	if (nfs41_setup_sequence(hdr->ds_clp->cl_session,
+			&hdr->args.seq_args,
+			&hdr->res.seq_res,
 			task))
 		return;
-	if (nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context,
-			rdata->args.lock_context, FMODE_READ) == -EIO)
+	if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
+			hdr->args.lock_context, FMODE_READ) == -EIO)
 		rpc_exit(task, -EIO); /* lost lock, terminate I/O */
 }
 
 static void filelayout_read_call_done(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *rdata = data;
+	struct nfs_pgio_header *hdr = data;
 
 	dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
 
-	if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) &&
+	if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
 	    task->tk_status == 0) {
-		nfs41_sequence_done(task, &rdata->res.seq_res);
+		nfs41_sequence_done(task, &hdr->res.seq_res);
 		return;
 	}
 
 	/* Note this may cause RPC to be resent */
-	rdata->header->mds_ops->rpc_call_done(task, data);
+	hdr->mds_ops->rpc_call_done(task, data);
 }
 
 static void filelayout_read_count_stats(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *rdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	rpc_count_iostats(task, NFS_SERVER(rdata->header->inode)->client->cl_metrics);
+	rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
 }
 
 static void filelayout_read_release(void *data)
 {
-	struct nfs_pgio_data *rdata = data;
-	struct pnfs_layout_hdr *lo = rdata->header->lseg->pls_layout;
+	struct nfs_pgio_header *hdr = data;
+	struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
 
 	filelayout_fenceme(lo->plh_inode, lo);
-	nfs_put_client(rdata->ds_clp);
-	rdata->header->mds_ops->rpc_release(data);
+	nfs_put_client(hdr->ds_clp);
+	hdr->mds_ops->rpc_release(data);
 }
 
 static int filelayout_write_done_cb(struct rpc_task *task,
-				struct nfs_pgio_data *data)
+				struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
 	int err;
 
-	trace_nfs4_pnfs_write(data, task->tk_status);
-	err = filelayout_async_handle_error(task, data->args.context->state,
-					    data->ds_clp, hdr->lseg);
+	trace_nfs4_pnfs_write(hdr, task->tk_status);
+	err = filelayout_async_handle_error(task, hdr->args.context->state,
+					    hdr->ds_clp, hdr->lseg);
 
 	switch (err) {
 	case -NFS4ERR_RESET_TO_MDS:
-		filelayout_reset_write(data);
+		filelayout_reset_write(hdr);
 		return task->tk_status;
 	case -EAGAIN:
 		rpc_restart_call_prepare(task);
 		return -EAGAIN;
 	}
 
-	filelayout_set_layoutcommit(data);
+	filelayout_set_layoutcommit(hdr);
 	return 0;
 }
 
@@ -419,57 +408,57 @@
 
 static void filelayout_write_prepare(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *wdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	if (unlikely(test_bit(NFS_CONTEXT_BAD, &wdata->args.context->flags))) {
+	if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
 		rpc_exit(task, -EIO);
 		return;
 	}
-	if (filelayout_reset_to_mds(wdata->header->lseg)) {
+	if (filelayout_reset_to_mds(hdr->lseg)) {
 		dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
-		filelayout_reset_write(wdata);
+		filelayout_reset_write(hdr);
 		rpc_exit(task, 0);
 		return;
 	}
-	if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
-			&wdata->args.seq_args,
-			&wdata->res.seq_res,
+	if (nfs41_setup_sequence(hdr->ds_clp->cl_session,
+			&hdr->args.seq_args,
+			&hdr->res.seq_res,
 			task))
 		return;
-	if (nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context,
-			wdata->args.lock_context, FMODE_WRITE) == -EIO)
+	if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
+			hdr->args.lock_context, FMODE_WRITE) == -EIO)
 		rpc_exit(task, -EIO); /* lost lock, terminate I/O */
 }
 
 static void filelayout_write_call_done(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *wdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) &&
+	if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
 	    task->tk_status == 0) {
-		nfs41_sequence_done(task, &wdata->res.seq_res);
+		nfs41_sequence_done(task, &hdr->res.seq_res);
 		return;
 	}
 
 	/* Note this may cause RPC to be resent */
-	wdata->header->mds_ops->rpc_call_done(task, data);
+	hdr->mds_ops->rpc_call_done(task, data);
 }
 
 static void filelayout_write_count_stats(struct rpc_task *task, void *data)
 {
-	struct nfs_pgio_data *wdata = data;
+	struct nfs_pgio_header *hdr = data;
 
-	rpc_count_iostats(task, NFS_SERVER(wdata->header->inode)->client->cl_metrics);
+	rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
 }
 
 static void filelayout_write_release(void *data)
 {
-	struct nfs_pgio_data *wdata = data;
-	struct pnfs_layout_hdr *lo = wdata->header->lseg->pls_layout;
+	struct nfs_pgio_header *hdr = data;
+	struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
 
 	filelayout_fenceme(lo->plh_inode, lo);
-	nfs_put_client(wdata->ds_clp);
-	wdata->header->mds_ops->rpc_release(data);
+	nfs_put_client(hdr->ds_clp);
+	hdr->mds_ops->rpc_release(data);
 }
 
 static void filelayout_commit_prepare(struct rpc_task *task, void *data)
@@ -529,19 +518,18 @@
 };
 
 static enum pnfs_try_status
-filelayout_read_pagelist(struct nfs_pgio_data *data)
+filelayout_read_pagelist(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
 	struct pnfs_layout_segment *lseg = hdr->lseg;
 	struct nfs4_pnfs_ds *ds;
 	struct rpc_clnt *ds_clnt;
-	loff_t offset = data->args.offset;
+	loff_t offset = hdr->args.offset;
 	u32 j, idx;
 	struct nfs_fh *fh;
 
 	dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
 		__func__, hdr->inode->i_ino,
-		data->args.pgbase, (size_t)data->args.count, offset);
+		hdr->args.pgbase, (size_t)hdr->args.count, offset);
 
 	/* Retrieve the correct rpc_client for the byte range */
 	j = nfs4_fl_calc_j_index(lseg, offset);
@@ -559,30 +547,29 @@
 
 	/* No multipath support. Use first DS */
 	atomic_inc(&ds->ds_clp->cl_count);
-	data->ds_clp = ds->ds_clp;
-	data->ds_idx = idx;
+	hdr->ds_clp = ds->ds_clp;
+	hdr->ds_idx = idx;
 	fh = nfs4_fl_select_ds_fh(lseg, j);
 	if (fh)
-		data->args.fh = fh;
+		hdr->args.fh = fh;
 
-	data->args.offset = filelayout_get_dserver_offset(lseg, offset);
-	data->mds_offset = offset;
+	hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
+	hdr->mds_offset = offset;
 
 	/* Perform an asynchronous read to ds */
-	nfs_initiate_pgio(ds_clnt, data,
+	nfs_initiate_pgio(ds_clnt, hdr,
 			    &filelayout_read_call_ops, 0, RPC_TASK_SOFTCONN);
 	return PNFS_ATTEMPTED;
 }
 
 /* Perform async writes. */
 static enum pnfs_try_status
-filelayout_write_pagelist(struct nfs_pgio_data *data, int sync)
+filelayout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
 {
-	struct nfs_pgio_header *hdr = data->header;
 	struct pnfs_layout_segment *lseg = hdr->lseg;
 	struct nfs4_pnfs_ds *ds;
 	struct rpc_clnt *ds_clnt;
-	loff_t offset = data->args.offset;
+	loff_t offset = hdr->args.offset;
 	u32 j, idx;
 	struct nfs_fh *fh;
 
@@ -598,21 +585,20 @@
 		return PNFS_NOT_ATTEMPTED;
 
 	dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n",
-		__func__, hdr->inode->i_ino, sync, (size_t) data->args.count,
+		__func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
 		offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count));
 
-	data->pgio_done_cb = filelayout_write_done_cb;
+	hdr->pgio_done_cb = filelayout_write_done_cb;
 	atomic_inc(&ds->ds_clp->cl_count);
-	data->ds_clp = ds->ds_clp;
-	data->ds_idx = idx;
+	hdr->ds_clp = ds->ds_clp;
+	hdr->ds_idx = idx;
 	fh = nfs4_fl_select_ds_fh(lseg, j);
 	if (fh)
-		data->args.fh = fh;
-
-	data->args.offset = filelayout_get_dserver_offset(lseg, offset);
+		hdr->args.fh = fh;
+	hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
 
 	/* Perform an asynchronous write */
-	nfs_initiate_pgio(ds_clnt, data,
+	nfs_initiate_pgio(ds_clnt, hdr,
 				    &filelayout_write_call_ops, sync,
 				    RPC_TASK_SOFTCONN);
 	return PNFS_ATTEMPTED;
@@ -1023,6 +1009,7 @@
 
 /* The generic layer is about to remove the req from the commit list.
  * If this will make the bucket empty, it will need to put the lseg reference.
+ * Note this is must be called holding the inode (/cinfo) lock
  */
 static void
 filelayout_clear_request_commit(struct nfs_page *req,
@@ -1030,7 +1017,6 @@
 {
 	struct pnfs_layout_segment *freeme = NULL;
 
-	spin_lock(cinfo->lock);
 	if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
 		goto out;
 	cinfo->ds->nwritten--;
@@ -1045,22 +1031,25 @@
 	}
 out:
 	nfs_request_remove_commit_list(req, cinfo);
-	spin_unlock(cinfo->lock);
-	pnfs_put_lseg(freeme);
+	pnfs_put_lseg_async(freeme);
 }
 
-static struct list_head *
-filelayout_choose_commit_list(struct nfs_page *req,
-			      struct pnfs_layout_segment *lseg,
-			      struct nfs_commit_info *cinfo)
+static void
+filelayout_mark_request_commit(struct nfs_page *req,
+			       struct pnfs_layout_segment *lseg,
+			       struct nfs_commit_info *cinfo)
+
 {
 	struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
 	u32 i, j;
 	struct list_head *list;
 	struct pnfs_commit_bucket *buckets;
 
-	if (fl->commit_through_mds)
-		return &cinfo->mds->list;
+	if (fl->commit_through_mds) {
+		list = &cinfo->mds->list;
+		spin_lock(cinfo->lock);
+		goto mds_commit;
+	}
 
 	/* Note that we are calling nfs4_fl_calc_j_index on each page
 	 * that ends up being committed to a data server.  An attractive
@@ -1084,19 +1073,22 @@
 	}
 	set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
 	cinfo->ds->nwritten++;
+
+mds_commit:
+	/* nfs_request_add_commit_list(). We need to add req to list without
+	 * dropping cinfo lock.
+	 */
+	set_bit(PG_CLEAN, &(req)->wb_flags);
+	nfs_list_add_request(req, list);
+	cinfo->mds->ncommit++;
 	spin_unlock(cinfo->lock);
-	return list;
-}
-
-static void
-filelayout_mark_request_commit(struct nfs_page *req,
-			       struct pnfs_layout_segment *lseg,
-			       struct nfs_commit_info *cinfo)
-{
-	struct list_head *list;
-
-	list = filelayout_choose_commit_list(req, lseg, cinfo);
-	nfs_request_add_commit_list(req, list, cinfo);
+	if (!cinfo->dreq) {
+		inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+		inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+			     BDI_RECLAIMABLE);
+		__mark_inode_dirty(req->wb_context->dentry->d_inode,
+				   I_DIRTY_DATASYNC);
+	}
 }
 
 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
@@ -1244,15 +1236,63 @@
 	spin_unlock(cinfo->lock);
 }
 
+/* filelayout_search_commit_reqs - Search lists in @cinfo for the head reqest
+ *				   for @page
+ * @cinfo - commit info for current inode
+ * @page - page to search for matching head request
+ *
+ * Returns a the head request if one is found, otherwise returns NULL.
+ */
+static struct nfs_page *
+filelayout_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page)
+{
+	struct nfs_page *freq, *t;
+	struct pnfs_commit_bucket *b;
+	int i;
+
+	/* Linearly search the commit lists for each bucket until a matching
+	 * request is found */
+	for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
+		list_for_each_entry_safe(freq, t, &b->written, wb_list) {
+			if (freq->wb_page == page)
+				return freq->wb_head;
+		}
+		list_for_each_entry_safe(freq, t, &b->committing, wb_list) {
+			if (freq->wb_page == page)
+				return freq->wb_head;
+		}
+	}
+
+	return NULL;
+}
+
+static void filelayout_retry_commit(struct nfs_commit_info *cinfo, int idx)
+{
+	struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
+	struct pnfs_commit_bucket *bucket = fl_cinfo->buckets;
+	struct pnfs_layout_segment *freeme;
+	int i;
+
+	for (i = idx; i < fl_cinfo->nbuckets; i++, bucket++) {
+		if (list_empty(&bucket->committing))
+			continue;
+		nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo);
+		spin_lock(cinfo->lock);
+		freeme = bucket->clseg;
+		bucket->clseg = NULL;
+		spin_unlock(cinfo->lock);
+		pnfs_put_lseg(freeme);
+	}
+}
+
 static unsigned int
 alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list)
 {
 	struct pnfs_ds_commit_info *fl_cinfo;
 	struct pnfs_commit_bucket *bucket;
 	struct nfs_commit_data *data;
-	int i, j;
+	int i;
 	unsigned int nreq = 0;
-	struct pnfs_layout_segment *freeme;
 
 	fl_cinfo = cinfo->ds;
 	bucket = fl_cinfo->buckets;
@@ -1272,16 +1312,7 @@
 	}
 
 	/* Clean up on error */
-	for (j = i; j < fl_cinfo->nbuckets; j++, bucket++) {
-		if (list_empty(&bucket->committing))
-			continue;
-		nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo);
-		spin_lock(cinfo->lock);
-		freeme = bucket->clseg;
-		bucket->clseg = NULL;
-		spin_unlock(cinfo->lock);
-		pnfs_put_lseg(freeme);
-	}
+	filelayout_retry_commit(cinfo, i);
 	/* Caller will clean up entries put on list */
 	return nreq;
 }
@@ -1301,8 +1332,12 @@
 			data->lseg = NULL;
 			list_add(&data->pages, &list);
 			nreq++;
-		} else
+		} else {
 			nfs_retry_commit(mds_pages, NULL, cinfo);
+			filelayout_retry_commit(cinfo, 0);
+			cinfo->completion_ops->error_cleanup(NFS_I(inode));
+			return -ENOMEM;
+		}
 	}
 
 	nreq += alloc_ds_commits(cinfo, &list);
@@ -1380,6 +1415,7 @@
 	.clear_request_commit	= filelayout_clear_request_commit,
 	.scan_commit_lists	= filelayout_scan_commit_lists,
 	.recover_commit_reqs	= filelayout_recover_commit_reqs,
+	.search_commit_reqs	= filelayout_search_commit_reqs,
 	.commit_pagelist	= filelayout_commit_pagelist,
 	.read_pagelist		= filelayout_read_pagelist,
 	.write_pagelist		= filelayout_write_pagelist,
diff --git a/fs/nfs/filelayout/filelayoutdev.c b/fs/nfs/filelayout/filelayoutdev.c
index e2a0361..8540516 100644
--- a/fs/nfs/filelayout/filelayoutdev.c
+++ b/fs/nfs/filelayout/filelayoutdev.c
@@ -695,7 +695,7 @@
 	if (pdev == NULL)
 		return NULL;
 
-	pages = kzalloc(max_pages * sizeof(struct page *), gfp_flags);
+	pages = kcalloc(max_pages, sizeof(struct page *), gfp_flags);
 	if (pages == NULL) {
 		kfree(pdev);
 		return NULL;
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index b94f804..880618a 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -112,7 +112,7 @@
 	 * if the dentry tree reaches them; however if the dentry already
 	 * exists, we'll pick it up at this point and use it as the root
 	 */
-	ret = d_obtain_alias(inode);
+	ret = d_obtain_root(inode);
 	if (IS_ERR(ret)) {
 		dprintk("nfs_get_root: get root dentry failed\n");
 		goto out;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 68921b0..577a36f 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1002,6 +1002,15 @@
 }
 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
 
+int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode)
+{
+	if (!(NFS_I(inode)->cache_validity &
+			(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
+			&& !nfs_attribute_cache_expired(inode))
+		return NFS_STALE(inode) ? -ESTALE : 0;
+	return -ECHILD;
+}
+
 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
 {
 	struct nfs_inode *nfsi = NFS_I(inode);
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index e2a45ae..9056622 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -247,11 +247,11 @@
 int nfs_iocounter_wait(struct nfs_io_counter *c);
 
 extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
-struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *);
-void nfs_rw_header_free(struct nfs_pgio_header *);
-void nfs_pgio_data_release(struct nfs_pgio_data *);
+struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
+void nfs_pgio_header_free(struct nfs_pgio_header *);
+void nfs_pgio_data_destroy(struct nfs_pgio_header *);
 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
-int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *,
+int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *,
 		      const struct rpc_call_ops *, int, int);
 void nfs_free_request(struct nfs_page *req);
 
@@ -451,6 +451,7 @@
 void nfs_mark_request_commit(struct nfs_page *req,
 			     struct pnfs_layout_segment *lseg,
 			     struct nfs_commit_info *cinfo);
+int nfs_write_need_commit(struct nfs_pgio_header *);
 int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
 			    int how, struct nfs_commit_info *cinfo);
 void nfs_retry_commit(struct list_head *page_list,
@@ -491,7 +492,7 @@
 extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
 
 /* nfs4proc.c */
-extern void __nfs4_read_done_cb(struct nfs_pgio_data *);
+extern void __nfs4_read_done_cb(struct nfs_pgio_header *);
 extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
 			    const struct rpc_timeout *timeparms,
 			    const char *ip_addr);
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 8f854dd..d0fec26 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -256,7 +256,7 @@
 	char *p = data + *result;
 
 	acl = get_acl(inode, type);
-	if (!acl)
+	if (IS_ERR_OR_NULL(acl))
 		return 0;
 
 	posix_acl_release(acl);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index f0afa29..809670e 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -795,41 +795,44 @@
 	return status;
 }
 
-static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 
 	if (nfs3_async_handle_jukebox(task, inode))
 		return -EAGAIN;
 
 	nfs_invalidate_atime(inode);
-	nfs_refresh_inode(inode, &data->fattr);
+	nfs_refresh_inode(inode, &hdr->fattr);
 	return 0;
 }
 
-static void nfs3_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
+				 struct rpc_message *msg)
 {
 	msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 }
 
-static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
+				      struct nfs_pgio_header *hdr)
 {
 	rpc_call_start(task);
 	return 0;
 }
 
-static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 
 	if (nfs3_async_handle_jukebox(task, inode))
 		return -EAGAIN;
 	if (task->tk_status >= 0)
-		nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
+		nfs_post_op_update_inode_force_wcc(inode, hdr->res.fattr);
 	return 0;
 }
 
-static void nfs3_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
+				  struct rpc_message *msg)
 {
 	msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 }
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index ba2affa..92193ed 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -54,7 +54,7 @@
 			const nfs4_stateid *);
 	int	(*find_root_sec)(struct nfs_server *, struct nfs_fh *,
 			struct nfs_fsinfo *);
-	int	(*free_lock_state)(struct nfs_server *,
+	void	(*free_lock_state)(struct nfs_server *,
 			struct nfs4_lock_state *);
 	const struct rpc_call_ops *call_sync_ops;
 	const struct nfs4_state_recovery_ops *reboot_recovery_ops;
@@ -129,27 +129,17 @@
  * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
  */
 
-struct nfs4_lock_owner {
-	unsigned int lo_type;
-#define NFS4_ANY_LOCK_TYPE	(0U)
-#define NFS4_FLOCK_LOCK_TYPE	(1U << 0)
-#define NFS4_POSIX_LOCK_TYPE	(1U << 1)
-	union {
-		fl_owner_t posix_owner;
-		pid_t flock_owner;
-	} lo_u;
-};
-
 struct nfs4_lock_state {
-	struct list_head	ls_locks;	/* Other lock stateids */
-	struct nfs4_state *	ls_state;	/* Pointer to open state */
+	struct list_head		ls_locks;   /* Other lock stateids */
+	struct nfs4_state *		ls_state;   /* Pointer to open state */
 #define NFS_LOCK_INITIALIZED 0
 #define NFS_LOCK_LOST        1
-	unsigned long		ls_flags;
+	unsigned long			ls_flags;
 	struct nfs_seqid_counter	ls_seqid;
-	nfs4_stateid		ls_stateid;
-	atomic_t		ls_count;
-	struct nfs4_lock_owner	ls_owner;
+	nfs4_stateid			ls_stateid;
+	atomic_t			ls_count;
+	fl_owner_t			ls_owner;
+	struct work_struct		ls_release;
 };
 
 /* bits for nfs4_state->flags */
@@ -337,11 +327,11 @@
  */
 static inline void
 nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
-			 struct rpc_message *msg, struct nfs_pgio_data *wdata)
+			 struct rpc_message *msg, struct nfs_pgio_header *hdr)
 {
 	if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) &&
 	    !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
-		wdata->args.stable = NFS_FILE_SYNC;
+		hdr->args.stable = NFS_FILE_SYNC;
 }
 #else /* CONFIG_NFS_v4_1 */
 static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
@@ -369,7 +359,7 @@
 
 static inline void
 nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp,
-			 struct rpc_message *msg, struct nfs_pgio_data *wdata)
+			 struct rpc_message *msg, struct nfs_pgio_header *hdr)
 {
 }
 #endif /* CONFIG_NFS_V4_1 */
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index aa9ef48..53e435a 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -855,6 +855,11 @@
 	};
 	struct rpc_timeout ds_timeout;
 	struct nfs_client *clp;
+	char buf[INET6_ADDRSTRLEN + 1];
+
+	if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0)
+		return ERR_PTR(-EINVAL);
+	cl_init.hostname = buf;
 
 	/*
 	 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4bf3d97..75ae8d2 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1952,6 +1952,14 @@
 	return status;
 }
 
+/*
+ * Additional permission checks in order to distinguish between an
+ * open for read, and an open for execute. This works around the
+ * fact that NFSv4 OPEN treats read and execute permissions as being
+ * the same.
+ * Note that in the non-execute case, we want to turn off permission
+ * checking if we just created a new file (POSIX open() semantics).
+ */
 static int nfs4_opendata_access(struct rpc_cred *cred,
 				struct nfs4_opendata *opendata,
 				struct nfs4_state *state, fmode_t fmode,
@@ -1966,14 +1974,14 @@
 		return 0;
 
 	mask = 0;
-	/* don't check MAY_WRITE - a newly created file may not have
-	 * write mode bits, but POSIX allows the creating process to write.
-	 * use openflags to check for exec, because fmode won't
-	 * always have FMODE_EXEC set when file open for exec. */
+	/*
+	 * Use openflags to check for exec, because fmode won't
+	 * always have FMODE_EXEC set when file open for exec.
+	 */
 	if (openflags & __FMODE_EXEC) {
 		/* ONLY check for exec rights */
 		mask = MAY_EXEC;
-	} else if (fmode & FMODE_READ)
+	} else if ((fmode & FMODE_READ) && !opendata->file_created)
 		mask = MAY_READ;
 
 	cache.cred = cred;
@@ -2216,8 +2224,15 @@
 	seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
 
 	ret = _nfs4_proc_open(opendata);
-	if (ret != 0)
+	if (ret != 0) {
+		if (ret == -ENOENT) {
+			d_drop(opendata->dentry);
+			d_add(opendata->dentry, NULL);
+			nfs_set_verifier(opendata->dentry,
+					 nfs_save_change_attribute(opendata->dir->d_inode));
+		}
 		goto out;
+	}
 
 	state = nfs4_opendata_to_nfs4_state(opendata);
 	ret = PTR_ERR(state);
@@ -2647,6 +2662,48 @@
 	.rpc_release = nfs4_free_closedata,
 };
 
+static bool nfs4_state_has_opener(struct nfs4_state *state)
+{
+	/* first check existing openers */
+	if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
+	    state->n_rdonly != 0)
+		return true;
+
+	if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
+	    state->n_wronly != 0)
+		return true;
+
+	if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
+	    state->n_rdwr != 0)
+		return true;
+
+	return false;
+}
+
+static bool nfs4_roc(struct inode *inode)
+{
+	struct nfs_inode *nfsi = NFS_I(inode);
+	struct nfs_open_context *ctx;
+	struct nfs4_state *state;
+
+	spin_lock(&inode->i_lock);
+	list_for_each_entry(ctx, &nfsi->open_files, list) {
+		state = ctx->state;
+		if (state == NULL)
+			continue;
+		if (nfs4_state_has_opener(state)) {
+			spin_unlock(&inode->i_lock);
+			return false;
+		}
+	}
+	spin_unlock(&inode->i_lock);
+
+	if (nfs4_check_delegation(inode, FMODE_READ))
+		return false;
+
+	return pnfs_roc(inode);
+}
+
 /* 
  * It is possible for data to be read/written from a mem-mapped file 
  * after the sys_close call (which hits the vfs layer as a flush).
@@ -2697,7 +2754,7 @@
 	calldata->res.fattr = &calldata->fattr;
 	calldata->res.seqid = calldata->arg.seqid;
 	calldata->res.server = server;
-	calldata->roc = pnfs_roc(state->inode);
+	calldata->roc = nfs4_roc(state->inode);
 	nfs_sb_active(calldata->inode->i_sb);
 
 	msg.rpc_argp = &calldata->arg;
@@ -4033,24 +4090,25 @@
 	return false;
 }
 
-void __nfs4_read_done_cb(struct nfs_pgio_data *data)
+void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
 {
-	nfs_invalidate_atime(data->header->inode);
+	nfs_invalidate_atime(hdr->inode);
 }
 
-static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	struct nfs_server *server = NFS_SERVER(data->header->inode);
+	struct nfs_server *server = NFS_SERVER(hdr->inode);
 
-	trace_nfs4_read(data, task->tk_status);
-	if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
+	trace_nfs4_read(hdr, task->tk_status);
+	if (nfs4_async_handle_error(task, server,
+				    hdr->args.context->state) == -EAGAIN) {
 		rpc_restart_call_prepare(task);
 		return -EAGAIN;
 	}
 
-	__nfs4_read_done_cb(data);
+	__nfs4_read_done_cb(hdr);
 	if (task->tk_status > 0)
-		renew_lease(server, data->timestamp);
+		renew_lease(server, hdr->timestamp);
 	return 0;
 }
 
@@ -4068,54 +4126,59 @@
 	return true;
 }
 
-static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
 
 	dprintk("--> %s\n", __func__);
 
-	if (!nfs4_sequence_done(task, &data->res.seq_res))
+	if (!nfs4_sequence_done(task, &hdr->res.seq_res))
 		return -EAGAIN;
-	if (nfs4_read_stateid_changed(task, &data->args))
+	if (nfs4_read_stateid_changed(task, &hdr->args))
 		return -EAGAIN;
-	return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
-				    nfs4_read_done_cb(task, data);
+	return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
+				    nfs4_read_done_cb(task, hdr);
 }
 
-static void nfs4_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
+				 struct rpc_message *msg)
 {
-	data->timestamp   = jiffies;
-	data->pgio_done_cb = nfs4_read_done_cb;
+	hdr->timestamp   = jiffies;
+	hdr->pgio_done_cb = nfs4_read_done_cb;
 	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
-	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
+	nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
 }
 
-static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
+				      struct nfs_pgio_header *hdr)
 {
-	if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
-			&data->args.seq_args,
-			&data->res.seq_res,
+	if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
+			&hdr->args.seq_args,
+			&hdr->res.seq_res,
 			task))
 		return 0;
-	if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
-				data->args.lock_context, data->header->rw_ops->rw_mode) == -EIO)
+	if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
+				hdr->args.lock_context,
+				hdr->rw_ops->rw_mode) == -EIO)
 		return -EIO;
-	if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
+	if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
 		return -EIO;
 	return 0;
 }
 
-static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs4_write_done_cb(struct rpc_task *task,
+			      struct nfs_pgio_header *hdr)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 	
-	trace_nfs4_write(data, task->tk_status);
-	if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
+	trace_nfs4_write(hdr, task->tk_status);
+	if (nfs4_async_handle_error(task, NFS_SERVER(inode),
+				    hdr->args.context->state) == -EAGAIN) {
 		rpc_restart_call_prepare(task);
 		return -EAGAIN;
 	}
 	if (task->tk_status >= 0) {
-		renew_lease(NFS_SERVER(inode), data->timestamp);
-		nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
+		renew_lease(NFS_SERVER(inode), hdr->timestamp);
+		nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
 	}
 	return 0;
 }
@@ -4134,23 +4197,21 @@
 	return true;
 }
 
-static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	if (!nfs4_sequence_done(task, &data->res.seq_res))
+	if (!nfs4_sequence_done(task, &hdr->res.seq_res))
 		return -EAGAIN;
-	if (nfs4_write_stateid_changed(task, &data->args))
+	if (nfs4_write_stateid_changed(task, &hdr->args))
 		return -EAGAIN;
-	return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
-		nfs4_write_done_cb(task, data);
+	return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
+		nfs4_write_done_cb(task, hdr);
 }
 
 static
-bool nfs4_write_need_cache_consistency_data(const struct nfs_pgio_data *data)
+bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
 {
-	const struct nfs_pgio_header *hdr = data->header;
-
 	/* Don't request attributes for pNFS or O_DIRECT writes */
-	if (data->ds_clp != NULL || hdr->dreq != NULL)
+	if (hdr->ds_clp != NULL || hdr->dreq != NULL)
 		return false;
 	/* Otherwise, request attributes if and only if we don't hold
 	 * a delegation
@@ -4158,23 +4219,24 @@
 	return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
 }
 
-static void nfs4_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
+				  struct rpc_message *msg)
 {
-	struct nfs_server *server = NFS_SERVER(data->header->inode);
+	struct nfs_server *server = NFS_SERVER(hdr->inode);
 
-	if (!nfs4_write_need_cache_consistency_data(data)) {
-		data->args.bitmask = NULL;
-		data->res.fattr = NULL;
+	if (!nfs4_write_need_cache_consistency_data(hdr)) {
+		hdr->args.bitmask = NULL;
+		hdr->res.fattr = NULL;
 	} else
-		data->args.bitmask = server->cache_consistency_bitmask;
+		hdr->args.bitmask = server->cache_consistency_bitmask;
 
-	if (!data->pgio_done_cb)
-		data->pgio_done_cb = nfs4_write_done_cb;
-	data->res.server = server;
-	data->timestamp   = jiffies;
+	if (!hdr->pgio_done_cb)
+		hdr->pgio_done_cb = nfs4_write_done_cb;
+	hdr->res.server = server;
+	hdr->timestamp   = jiffies;
 
 	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
-	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
+	nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
 }
 
 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
@@ -4881,6 +4943,18 @@
 		return scnprintf(buf, len, "tcp");
 }
 
+static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
+{
+	struct nfs4_setclientid *sc = calldata;
+
+	if (task->tk_status == 0)
+		sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
+}
+
+static const struct rpc_call_ops nfs4_setclientid_ops = {
+	.rpc_call_done = nfs4_setclientid_done,
+};
+
 /**
  * nfs4_proc_setclientid - Negotiate client ID
  * @clp: state data structure
@@ -4907,6 +4981,14 @@
 		.rpc_resp = res,
 		.rpc_cred = cred,
 	};
+	struct rpc_task *task;
+	struct rpc_task_setup task_setup_data = {
+		.rpc_client = clp->cl_rpcclient,
+		.rpc_message = &msg,
+		.callback_ops = &nfs4_setclientid_ops,
+		.callback_data = &setclientid,
+		.flags = RPC_TASK_TIMEOUT,
+	};
 	int status;
 
 	/* nfs_client_id4 */
@@ -4933,7 +5015,18 @@
 	dprintk("NFS call  setclientid auth=%s, '%.*s'\n",
 		clp->cl_rpcclient->cl_auth->au_ops->au_name,
 		setclientid.sc_name_len, setclientid.sc_name);
-	status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
+	task = rpc_run_task(&task_setup_data);
+	if (IS_ERR(task)) {
+		status = PTR_ERR(task);
+		goto out;
+	}
+	status = task->tk_status;
+	if (setclientid.sc_cred) {
+		clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
+		put_rpccred(setclientid.sc_cred);
+	}
+	rpc_put_task(task);
+out:
 	trace_nfs4_setclientid(clp, status);
 	dprintk("NFS reply setclientid: %d\n", status);
 	return status;
@@ -4975,6 +5068,9 @@
 	unsigned long timestamp;
 	struct nfs_fattr fattr;
 	int rpc_status;
+	struct inode *inode;
+	bool roc;
+	u32 roc_barrier;
 };
 
 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
@@ -4988,7 +5084,6 @@
 	switch (task->tk_status) {
 	case 0:
 		renew_lease(data->res.server, data->timestamp);
-		break;
 	case -NFS4ERR_ADMIN_REVOKED:
 	case -NFS4ERR_DELEG_REVOKED:
 	case -NFS4ERR_BAD_STATEID:
@@ -4996,6 +5091,8 @@
 	case -NFS4ERR_STALE_STATEID:
 	case -NFS4ERR_EXPIRED:
 		task->tk_status = 0;
+		if (data->roc)
+			pnfs_roc_set_barrier(data->inode, data->roc_barrier);
 		break;
 	default:
 		if (nfs4_async_handle_error(task, data->res.server, NULL) ==
@@ -5009,6 +5106,10 @@
 
 static void nfs4_delegreturn_release(void *calldata)
 {
+	struct nfs4_delegreturndata *data = calldata;
+
+	if (data->roc)
+		pnfs_roc_release(data->inode);
 	kfree(calldata);
 }
 
@@ -5018,6 +5119,10 @@
 
 	d_data = (struct nfs4_delegreturndata *)data;
 
+	if (d_data->roc &&
+	    pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
+		return;
+
 	nfs4_setup_sequence(d_data->res.server,
 			&d_data->args.seq_args,
 			&d_data->res.seq_res,
@@ -5061,6 +5166,9 @@
 	nfs_fattr_init(data->res.fattr);
 	data->timestamp = jiffies;
 	data->rpc_status = 0;
+	data->inode = inode;
+	data->roc = list_empty(&NFS_I(inode)->open_files) ?
+		    pnfs_roc(inode) : false;
 
 	task_setup_data.callback_data = data;
 	msg.rpc_argp = &data->args;
@@ -5834,8 +5942,10 @@
 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
 {
 	struct nfs_release_lockowner_data *data = calldata;
-	nfs40_setup_sequence(data->server,
-				&data->args.seq_args, &data->res.seq_res, task);
+	struct nfs_server *server = data->server;
+	nfs40_setup_sequence(server, &data->args.seq_args,
+				&data->res.seq_res, task);
+	data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
 	data->timestamp = jiffies;
 }
 
@@ -5852,6 +5962,8 @@
 		break;
 	case -NFS4ERR_STALE_CLIENTID:
 	case -NFS4ERR_EXPIRED:
+		nfs4_schedule_lease_recovery(server->nfs_client);
+		break;
 	case -NFS4ERR_LEASE_MOVED:
 	case -NFS4ERR_DELAY:
 		if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
@@ -5872,7 +5984,8 @@
 	.rpc_release = nfs4_release_lockowner_release,
 };
 
-static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
+static void
+nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
 {
 	struct nfs_release_lockowner_data *data;
 	struct rpc_message msg = {
@@ -5880,11 +5993,11 @@
 	};
 
 	if (server->nfs_client->cl_mvops->minor_version != 0)
-		return -EINVAL;
+		return;
 
 	data = kmalloc(sizeof(*data), GFP_NOFS);
 	if (!data)
-		return -ENOMEM;
+		return;
 	data->lsp = lsp;
 	data->server = server;
 	data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
@@ -5895,7 +6008,6 @@
 	msg.rpc_resp = &data->res;
 	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
 	rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
-	return 0;
 }
 
 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
@@ -8182,7 +8294,8 @@
 	return ret;
 }
 
-static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
+static void
+nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
 {
 	struct rpc_task *task;
 	struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
@@ -8190,9 +8303,8 @@
 	task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
 	nfs4_free_lock_state(server, lsp);
 	if (IS_ERR(task))
-		return PTR_ERR(task);
+		return;
 	rpc_put_task(task);
-	return 0;
 }
 
 static bool nfs41_match_stateid(const nfs4_stateid *s1,
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 42f1211..a043f61 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -787,33 +787,36 @@
  * that is compatible with current->files
  */
 static struct nfs4_lock_state *
-__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type)
+__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
 {
 	struct nfs4_lock_state *pos;
 	list_for_each_entry(pos, &state->lock_states, ls_locks) {
-		if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type)
+		if (pos->ls_owner != fl_owner)
 			continue;
-		switch (pos->ls_owner.lo_type) {
-		case NFS4_POSIX_LOCK_TYPE:
-			if (pos->ls_owner.lo_u.posix_owner != fl_owner)
-				continue;
-			break;
-		case NFS4_FLOCK_LOCK_TYPE:
-			if (pos->ls_owner.lo_u.flock_owner != fl_pid)
-				continue;
-		}
 		atomic_inc(&pos->ls_count);
 		return pos;
 	}
 	return NULL;
 }
 
+static void
+free_lock_state_work(struct work_struct *work)
+{
+	struct nfs4_lock_state *lsp = container_of(work,
+					struct nfs4_lock_state, ls_release);
+	struct nfs4_state *state = lsp->ls_state;
+	struct nfs_server *server = state->owner->so_server;
+	struct nfs_client *clp = server->nfs_client;
+
+	clp->cl_mvops->free_lock_state(server, lsp);
+}
+
 /*
  * Return a compatible lock_state. If no initialized lock_state structure
  * exists, return an uninitialized one.
  *
  */
-static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type)
+static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
 {
 	struct nfs4_lock_state *lsp;
 	struct nfs_server *server = state->owner->so_server;
@@ -824,21 +827,12 @@
 	nfs4_init_seqid_counter(&lsp->ls_seqid);
 	atomic_set(&lsp->ls_count, 1);
 	lsp->ls_state = state;
-	lsp->ls_owner.lo_type = type;
-	switch (lsp->ls_owner.lo_type) {
-	case NFS4_FLOCK_LOCK_TYPE:
-		lsp->ls_owner.lo_u.flock_owner = fl_pid;
-		break;
-	case NFS4_POSIX_LOCK_TYPE:
-		lsp->ls_owner.lo_u.posix_owner = fl_owner;
-		break;
-	default:
-		goto out_free;
-	}
+	lsp->ls_owner = fl_owner;
 	lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS);
 	if (lsp->ls_seqid.owner_id < 0)
 		goto out_free;
 	INIT_LIST_HEAD(&lsp->ls_locks);
+	INIT_WORK(&lsp->ls_release, free_lock_state_work);
 	return lsp;
 out_free:
 	kfree(lsp);
@@ -857,13 +851,13 @@
  * exists, return an uninitialized one.
  *
  */
-static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type)
+static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
 {
 	struct nfs4_lock_state *lsp, *new = NULL;
 	
 	for(;;) {
 		spin_lock(&state->state_lock);
-		lsp = __nfs4_find_lock_state(state, owner, pid, type);
+		lsp = __nfs4_find_lock_state(state, owner);
 		if (lsp != NULL)
 			break;
 		if (new != NULL) {
@@ -874,7 +868,7 @@
 			break;
 		}
 		spin_unlock(&state->state_lock);
-		new = nfs4_alloc_lock_state(state, owner, pid, type);
+		new = nfs4_alloc_lock_state(state, owner);
 		if (new == NULL)
 			return NULL;
 	}
@@ -902,13 +896,12 @@
 	if (list_empty(&state->lock_states))
 		clear_bit(LK_STATE_IN_USE, &state->flags);
 	spin_unlock(&state->state_lock);
-	server = state->owner->so_server;
-	if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
-		struct nfs_client *clp = server->nfs_client;
-
-		clp->cl_mvops->free_lock_state(server, lsp);
-	} else
+	if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags))
+		queue_work(nfsiod_workqueue, &lsp->ls_release);
+	else {
+		server = state->owner->so_server;
 		nfs4_free_lock_state(server, lsp);
+	}
 }
 
 static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src)
@@ -935,13 +928,7 @@
 
 	if (fl->fl_ops != NULL)
 		return 0;
-	if (fl->fl_flags & FL_POSIX)
-		lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE);
-	else if (fl->fl_flags & FL_FLOCK)
-		lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid,
-				NFS4_FLOCK_LOCK_TYPE);
-	else
-		return -EINVAL;
+	lsp = nfs4_get_lock_state(state, fl->fl_owner);
 	if (lsp == NULL)
 		return -ENOMEM;
 	fl->fl_u.nfs4_fl.owner = lsp;
@@ -955,7 +942,6 @@
 {
 	struct nfs4_lock_state *lsp;
 	fl_owner_t fl_owner;
-	pid_t fl_pid;
 	int ret = -ENOENT;
 
 
@@ -966,9 +952,8 @@
 		goto out;
 
 	fl_owner = lockowner->l_owner;
-	fl_pid = lockowner->l_pid;
 	spin_lock(&state->state_lock);
-	lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE);
+	lsp = __nfs4_find_lock_state(state, fl_owner);
 	if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
 		ret = -EIO;
 	else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) {
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 0a744f3..1c32adb 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -932,11 +932,11 @@
 
 DECLARE_EVENT_CLASS(nfs4_read_event,
 		TP_PROTO(
-			const struct nfs_pgio_data *data,
+			const struct nfs_pgio_header *hdr,
 			int error
 		),
 
-		TP_ARGS(data, error),
+		TP_ARGS(hdr, error),
 
 		TP_STRUCT__entry(
 			__field(dev_t, dev)
@@ -948,12 +948,12 @@
 		),
 
 		TP_fast_assign(
-			const struct inode *inode = data->header->inode;
+			const struct inode *inode = hdr->inode;
 			__entry->dev = inode->i_sb->s_dev;
 			__entry->fileid = NFS_FILEID(inode);
 			__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
-			__entry->offset = data->args.offset;
-			__entry->count = data->args.count;
+			__entry->offset = hdr->args.offset;
+			__entry->count = hdr->args.count;
 			__entry->error = error;
 		),
 
@@ -972,10 +972,10 @@
 #define DEFINE_NFS4_READ_EVENT(name) \
 	DEFINE_EVENT(nfs4_read_event, name, \
 			TP_PROTO( \
-				const struct nfs_pgio_data *data, \
+				const struct nfs_pgio_header *hdr, \
 				int error \
 			), \
-			TP_ARGS(data, error))
+			TP_ARGS(hdr, error))
 DEFINE_NFS4_READ_EVENT(nfs4_read);
 #ifdef CONFIG_NFS_V4_1
 DEFINE_NFS4_READ_EVENT(nfs4_pnfs_read);
@@ -983,11 +983,11 @@
 
 DECLARE_EVENT_CLASS(nfs4_write_event,
 		TP_PROTO(
-			const struct nfs_pgio_data *data,
+			const struct nfs_pgio_header *hdr,
 			int error
 		),
 
-		TP_ARGS(data, error),
+		TP_ARGS(hdr, error),
 
 		TP_STRUCT__entry(
 			__field(dev_t, dev)
@@ -999,12 +999,12 @@
 		),
 
 		TP_fast_assign(
-			const struct inode *inode = data->header->inode;
+			const struct inode *inode = hdr->inode;
 			__entry->dev = inode->i_sb->s_dev;
 			__entry->fileid = NFS_FILEID(inode);
 			__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
-			__entry->offset = data->args.offset;
-			__entry->count = data->args.count;
+			__entry->offset = hdr->args.offset;
+			__entry->count = hdr->args.count;
 			__entry->error = error;
 		),
 
@@ -1024,10 +1024,10 @@
 #define DEFINE_NFS4_WRITE_EVENT(name) \
 	DEFINE_EVENT(nfs4_write_event, name, \
 			TP_PROTO( \
-				const struct nfs_pgio_data *data, \
+				const struct nfs_pgio_header *hdr, \
 				int error \
 			), \
-			TP_ARGS(data, error))
+			TP_ARGS(hdr, error))
 DEFINE_NFS4_WRITE_EVENT(nfs4_write);
 #ifdef CONFIG_NFS_V4_1
 DEFINE_NFS4_WRITE_EVENT(nfs4_pnfs_write);
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 939ae60..e13b59d 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -7092,7 +7092,7 @@
 	if (!status)
 		status = decode_sequence(xdr, &res->seq_res, rqstp);
 	if (!status)
-		status = decode_reclaim_complete(xdr, (void *)NULL);
+		status = decode_reclaim_complete(xdr, NULL);
 	return status;
 }
 
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 6113207..ae05278 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -439,22 +439,21 @@
 	objlayout_read_done(&objios->oir, status, objios->sync);
 }
 
-int objio_read_pagelist(struct nfs_pgio_data *rdata)
+int objio_read_pagelist(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = rdata->header;
 	struct objio_state *objios;
 	int ret;
 
 	ret = objio_alloc_io_state(NFS_I(hdr->inode)->layout, true,
-			hdr->lseg, rdata->args.pages, rdata->args.pgbase,
-			rdata->args.offset, rdata->args.count, rdata,
+			hdr->lseg, hdr->args.pages, hdr->args.pgbase,
+			hdr->args.offset, hdr->args.count, hdr,
 			GFP_KERNEL, &objios);
 	if (unlikely(ret))
 		return ret;
 
 	objios->ios->done = _read_done;
 	dprintk("%s: offset=0x%llx length=0x%x\n", __func__,
-		rdata->args.offset, rdata->args.count);
+		hdr->args.offset, hdr->args.count);
 	ret = ore_read(objios->ios);
 	if (unlikely(ret))
 		objio_free_result(&objios->oir);
@@ -487,11 +486,11 @@
 static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate)
 {
 	struct objio_state *objios = priv;
-	struct nfs_pgio_data *wdata = objios->oir.rpcdata;
-	struct address_space *mapping = wdata->header->inode->i_mapping;
+	struct nfs_pgio_header *hdr = objios->oir.rpcdata;
+	struct address_space *mapping = hdr->inode->i_mapping;
 	pgoff_t index = offset / PAGE_SIZE;
 	struct page *page;
-	loff_t i_size = i_size_read(wdata->header->inode);
+	loff_t i_size = i_size_read(hdr->inode);
 
 	if (offset >= i_size) {
 		*uptodate = true;
@@ -531,15 +530,14 @@
 	.put_page = &__r4w_put_page,
 };
 
-int objio_write_pagelist(struct nfs_pgio_data *wdata, int how)
+int objio_write_pagelist(struct nfs_pgio_header *hdr, int how)
 {
-	struct nfs_pgio_header *hdr = wdata->header;
 	struct objio_state *objios;
 	int ret;
 
 	ret = objio_alloc_io_state(NFS_I(hdr->inode)->layout, false,
-			hdr->lseg, wdata->args.pages, wdata->args.pgbase,
-			wdata->args.offset, wdata->args.count, wdata, GFP_NOFS,
+			hdr->lseg, hdr->args.pages, hdr->args.pgbase,
+			hdr->args.offset, hdr->args.count, hdr, GFP_NOFS,
 			&objios);
 	if (unlikely(ret))
 		return ret;
@@ -551,7 +549,7 @@
 		objios->ios->done = _write_done;
 
 	dprintk("%s: offset=0x%llx length=0x%x\n", __func__,
-		wdata->args.offset, wdata->args.count);
+		hdr->args.offset, hdr->args.count);
 	ret = ore_write(objios->ios);
 	if (unlikely(ret)) {
 		objio_free_result(&objios->oir);
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index 765d3f5..697a16d 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -229,36 +229,36 @@
 static void _rpc_read_complete(struct work_struct *work)
 {
 	struct rpc_task *task;
-	struct nfs_pgio_data *rdata;
+	struct nfs_pgio_header *hdr;
 
 	dprintk("%s enter\n", __func__);
 	task = container_of(work, struct rpc_task, u.tk_work);
-	rdata = container_of(task, struct nfs_pgio_data, task);
+	hdr = container_of(task, struct nfs_pgio_header, task);
 
-	pnfs_ld_read_done(rdata);
+	pnfs_ld_read_done(hdr);
 }
 
 void
 objlayout_read_done(struct objlayout_io_res *oir, ssize_t status, bool sync)
 {
-	struct nfs_pgio_data *rdata = oir->rpcdata;
+	struct nfs_pgio_header *hdr = oir->rpcdata;
 
-	oir->status = rdata->task.tk_status = status;
+	oir->status = hdr->task.tk_status = status;
 	if (status >= 0)
-		rdata->res.count = status;
+		hdr->res.count = status;
 	else
-		rdata->header->pnfs_error = status;
+		hdr->pnfs_error = status;
 	objlayout_iodone(oir);
 	/* must not use oir after this point */
 
 	dprintk("%s: Return status=%zd eof=%d sync=%d\n", __func__,
-		status, rdata->res.eof, sync);
+		status, hdr->res.eof, sync);
 
 	if (sync)
-		pnfs_ld_read_done(rdata);
+		pnfs_ld_read_done(hdr);
 	else {
-		INIT_WORK(&rdata->task.u.tk_work, _rpc_read_complete);
-		schedule_work(&rdata->task.u.tk_work);
+		INIT_WORK(&hdr->task.u.tk_work, _rpc_read_complete);
+		schedule_work(&hdr->task.u.tk_work);
 	}
 }
 
@@ -266,12 +266,11 @@
  * Perform sync or async reads.
  */
 enum pnfs_try_status
-objlayout_read_pagelist(struct nfs_pgio_data *rdata)
+objlayout_read_pagelist(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = rdata->header;
 	struct inode *inode = hdr->inode;
-	loff_t offset = rdata->args.offset;
-	size_t count = rdata->args.count;
+	loff_t offset = hdr->args.offset;
+	size_t count = hdr->args.count;
 	int err;
 	loff_t eof;
 
@@ -279,23 +278,23 @@
 	if (unlikely(offset + count > eof)) {
 		if (offset >= eof) {
 			err = 0;
-			rdata->res.count = 0;
-			rdata->res.eof = 1;
+			hdr->res.count = 0;
+			hdr->res.eof = 1;
 			/*FIXME: do we need to call pnfs_ld_read_done() */
 			goto out;
 		}
 		count = eof - offset;
 	}
 
-	rdata->res.eof = (offset + count) >= eof;
-	_fix_verify_io_params(hdr->lseg, &rdata->args.pages,
-			      &rdata->args.pgbase,
-			      rdata->args.offset, rdata->args.count);
+	hdr->res.eof = (offset + count) >= eof;
+	_fix_verify_io_params(hdr->lseg, &hdr->args.pages,
+			      &hdr->args.pgbase,
+			      hdr->args.offset, hdr->args.count);
 
 	dprintk("%s: inode(%lx) offset 0x%llx count 0x%Zx eof=%d\n",
-		__func__, inode->i_ino, offset, count, rdata->res.eof);
+		__func__, inode->i_ino, offset, count, hdr->res.eof);
 
-	err = objio_read_pagelist(rdata);
+	err = objio_read_pagelist(hdr);
  out:
 	if (unlikely(err)) {
 		hdr->pnfs_error = err;
@@ -312,38 +311,38 @@
 static void _rpc_write_complete(struct work_struct *work)
 {
 	struct rpc_task *task;
-	struct nfs_pgio_data *wdata;
+	struct nfs_pgio_header *hdr;
 
 	dprintk("%s enter\n", __func__);
 	task = container_of(work, struct rpc_task, u.tk_work);
-	wdata = container_of(task, struct nfs_pgio_data, task);
+	hdr = container_of(task, struct nfs_pgio_header, task);
 
-	pnfs_ld_write_done(wdata);
+	pnfs_ld_write_done(hdr);
 }
 
 void
 objlayout_write_done(struct objlayout_io_res *oir, ssize_t status, bool sync)
 {
-	struct nfs_pgio_data *wdata = oir->rpcdata;
+	struct nfs_pgio_header *hdr = oir->rpcdata;
 
-	oir->status = wdata->task.tk_status = status;
+	oir->status = hdr->task.tk_status = status;
 	if (status >= 0) {
-		wdata->res.count = status;
-		wdata->verf.committed = oir->committed;
+		hdr->res.count = status;
+		hdr->verf.committed = oir->committed;
 	} else {
-		wdata->header->pnfs_error = status;
+		hdr->pnfs_error = status;
 	}
 	objlayout_iodone(oir);
 	/* must not use oir after this point */
 
 	dprintk("%s: Return status %zd committed %d sync=%d\n", __func__,
-		status, wdata->verf.committed, sync);
+		status, hdr->verf.committed, sync);
 
 	if (sync)
-		pnfs_ld_write_done(wdata);
+		pnfs_ld_write_done(hdr);
 	else {
-		INIT_WORK(&wdata->task.u.tk_work, _rpc_write_complete);
-		schedule_work(&wdata->task.u.tk_work);
+		INIT_WORK(&hdr->task.u.tk_work, _rpc_write_complete);
+		schedule_work(&hdr->task.u.tk_work);
 	}
 }
 
@@ -351,17 +350,15 @@
  * Perform sync or async writes.
  */
 enum pnfs_try_status
-objlayout_write_pagelist(struct nfs_pgio_data *wdata,
-			 int how)
+objlayout_write_pagelist(struct nfs_pgio_header *hdr, int how)
 {
-	struct nfs_pgio_header *hdr = wdata->header;
 	int err;
 
-	_fix_verify_io_params(hdr->lseg, &wdata->args.pages,
-			      &wdata->args.pgbase,
-			      wdata->args.offset, wdata->args.count);
+	_fix_verify_io_params(hdr->lseg, &hdr->args.pages,
+			      &hdr->args.pgbase,
+			      hdr->args.offset, hdr->args.count);
 
-	err = objio_write_pagelist(wdata, how);
+	err = objio_write_pagelist(hdr, how);
 	if (unlikely(err)) {
 		hdr->pnfs_error = err;
 		dprintk("%s: Returned Error %d\n", __func__, err);
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index 01e0410..fd13f1d 100644
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -119,8 +119,8 @@
  */
 extern void objio_free_result(struct objlayout_io_res *oir);
 
-extern int objio_read_pagelist(struct nfs_pgio_data *rdata);
-extern int objio_write_pagelist(struct nfs_pgio_data *wdata, int how);
+extern int objio_read_pagelist(struct nfs_pgio_header *rdata);
+extern int objio_write_pagelist(struct nfs_pgio_header *wdata, int how);
 
 /*
  * callback API
@@ -168,10 +168,10 @@
 extern void objlayout_free_lseg(struct pnfs_layout_segment *);
 
 extern enum pnfs_try_status objlayout_read_pagelist(
-	struct nfs_pgio_data *);
+	struct nfs_pgio_header *);
 
 extern enum pnfs_try_status objlayout_write_pagelist(
-	struct nfs_pgio_data *,
+	struct nfs_pgio_header *,
 	int how);
 
 extern void objlayout_encode_layoutcommit(
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 0be5050..ba49192 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -141,16 +141,24 @@
  * @req - request in group that is to be locked
  *
  * this lock must be held if modifying the page group list
+ *
+ * returns result from wait_on_bit_lock: 0 on success, < 0 on error
  */
-void
-nfs_page_group_lock(struct nfs_page *req)
+int
+nfs_page_group_lock(struct nfs_page *req, bool wait)
 {
 	struct nfs_page *head = req->wb_head;
+	int ret;
 
 	WARN_ON_ONCE(head != head->wb_head);
 
-	wait_on_bit_lock(&head->wb_flags, PG_HEADLOCK,
+	do {
+		ret = wait_on_bit_lock(&head->wb_flags, PG_HEADLOCK,
 			TASK_UNINTERRUPTIBLE);
+	} while (wait && ret != 0);
+
+	WARN_ON_ONCE(ret > 0);
+	return ret;
 }
 
 /*
@@ -211,7 +219,7 @@
 {
 	bool ret;
 
-	nfs_page_group_lock(req);
+	nfs_page_group_lock(req, true);
 	ret = nfs_page_group_sync_on_bit_locked(req, bit);
 	nfs_page_group_unlock(req);
 
@@ -454,123 +462,72 @@
 }
 EXPORT_SYMBOL_GPL(nfs_generic_pg_test);
 
-static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr)
+struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops)
 {
-	return container_of(hdr, struct nfs_rw_header, header);
-}
+	struct nfs_pgio_header *hdr = ops->rw_alloc_header();
 
-/**
- * nfs_rw_header_alloc - Allocate a header for a read or write
- * @ops: Read or write function vector
- */
-struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *ops)
-{
-	struct nfs_rw_header *header = ops->rw_alloc_header();
-
-	if (header) {
-		struct nfs_pgio_header *hdr = &header->header;
-
+	if (hdr) {
 		INIT_LIST_HEAD(&hdr->pages);
 		spin_lock_init(&hdr->lock);
-		atomic_set(&hdr->refcnt, 0);
 		hdr->rw_ops = ops;
 	}
-	return header;
+	return hdr;
 }
-EXPORT_SYMBOL_GPL(nfs_rw_header_alloc);
+EXPORT_SYMBOL_GPL(nfs_pgio_header_alloc);
 
 /*
- * nfs_rw_header_free - Free a read or write header
+ * nfs_pgio_header_free - Free a read or write header
  * @hdr: The header to free
  */
-void nfs_rw_header_free(struct nfs_pgio_header *hdr)
+void nfs_pgio_header_free(struct nfs_pgio_header *hdr)
 {
-	hdr->rw_ops->rw_free_header(NFS_RW_HEADER(hdr));
+	hdr->rw_ops->rw_free_header(hdr);
 }
-EXPORT_SYMBOL_GPL(nfs_rw_header_free);
+EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
 
 /**
- * nfs_pgio_data_alloc - Allocate pageio data
- * @hdr: The header making a request
- * @pagecount: Number of pages to create
+ * nfs_pgio_data_destroy - make @hdr suitable for reuse
+ *
+ * Frees memory and releases refs from nfs_generic_pgio, so that it may
+ * be called again.
+ *
+ * @hdr: A header that has had nfs_generic_pgio called
  */
-static struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *hdr,
-						 unsigned int pagecount)
+void nfs_pgio_data_destroy(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_data *data, *prealloc;
-
-	prealloc = &NFS_RW_HEADER(hdr)->rpc_data;
-	if (prealloc->header == NULL)
-		data = prealloc;
-	else
-		data = kzalloc(sizeof(*data), GFP_KERNEL);
-	if (!data)
-		goto out;
-
-	if (nfs_pgarray_set(&data->pages, pagecount)) {
-		data->header = hdr;
-		atomic_inc(&hdr->refcnt);
-	} else {
-		if (data != prealloc)
-			kfree(data);
-		data = NULL;
-	}
-out:
-	return data;
+	put_nfs_open_context(hdr->args.context);
+	if (hdr->page_array.pagevec != hdr->page_array.page_array)
+		kfree(hdr->page_array.pagevec);
 }
-
-/**
- * nfs_pgio_data_release - Properly free pageio data
- * @data: The data to release
- */
-void nfs_pgio_data_release(struct nfs_pgio_data *data)
-{
-	struct nfs_pgio_header *hdr = data->header;
-	struct nfs_rw_header *pageio_header = NFS_RW_HEADER(hdr);
-
-	put_nfs_open_context(data->args.context);
-	if (data->pages.pagevec != data->pages.page_array)
-		kfree(data->pages.pagevec);
-	if (data == &pageio_header->rpc_data) {
-		data->header = NULL;
-		data = NULL;
-	}
-	if (atomic_dec_and_test(&hdr->refcnt))
-		hdr->completion_ops->completion(hdr);
-	/* Note: we only free the rpc_task after callbacks are done.
-	 * See the comment in rpc_free_task() for why
-	 */
-	kfree(data);
-}
-EXPORT_SYMBOL_GPL(nfs_pgio_data_release);
+EXPORT_SYMBOL_GPL(nfs_pgio_data_destroy);
 
 /**
  * nfs_pgio_rpcsetup - Set up arguments for a pageio call
- * @data: The pageio data
+ * @hdr: The pageio hdr
  * @count: Number of bytes to read
  * @offset: Initial offset
  * @how: How to commit data (writes only)
  * @cinfo: Commit information for the call (writes only)
  */
-static void nfs_pgio_rpcsetup(struct nfs_pgio_data *data,
+static void nfs_pgio_rpcsetup(struct nfs_pgio_header *hdr,
 			      unsigned int count, unsigned int offset,
 			      int how, struct nfs_commit_info *cinfo)
 {
-	struct nfs_page *req = data->header->req;
+	struct nfs_page *req = hdr->req;
 
 	/* Set up the RPC argument and reply structs
-	 * NB: take care not to mess about with data->commit et al. */
+	 * NB: take care not to mess about with hdr->commit et al. */
 
-	data->args.fh     = NFS_FH(data->header->inode);
-	data->args.offset = req_offset(req) + offset;
+	hdr->args.fh     = NFS_FH(hdr->inode);
+	hdr->args.offset = req_offset(req) + offset;
 	/* pnfs_set_layoutcommit needs this */
-	data->mds_offset = data->args.offset;
-	data->args.pgbase = req->wb_pgbase + offset;
-	data->args.pages  = data->pages.pagevec;
-	data->args.count  = count;
-	data->args.context = get_nfs_open_context(req->wb_context);
-	data->args.lock_context = req->wb_lock_context;
-	data->args.stable  = NFS_UNSTABLE;
+	hdr->mds_offset = hdr->args.offset;
+	hdr->args.pgbase = req->wb_pgbase + offset;
+	hdr->args.pages  = hdr->page_array.pagevec;
+	hdr->args.count  = count;
+	hdr->args.context = get_nfs_open_context(req->wb_context);
+	hdr->args.lock_context = req->wb_lock_context;
+	hdr->args.stable  = NFS_UNSTABLE;
 	switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) {
 	case 0:
 		break;
@@ -578,59 +535,59 @@
 		if (nfs_reqs_to_commit(cinfo))
 			break;
 	default:
-		data->args.stable = NFS_FILE_SYNC;
+		hdr->args.stable = NFS_FILE_SYNC;
 	}
 
-	data->res.fattr   = &data->fattr;
-	data->res.count   = count;
-	data->res.eof     = 0;
-	data->res.verf    = &data->verf;
-	nfs_fattr_init(&data->fattr);
+	hdr->res.fattr   = &hdr->fattr;
+	hdr->res.count   = count;
+	hdr->res.eof     = 0;
+	hdr->res.verf    = &hdr->verf;
+	nfs_fattr_init(&hdr->fattr);
 }
 
 /**
- * nfs_pgio_prepare - Prepare pageio data to go over the wire
+ * nfs_pgio_prepare - Prepare pageio hdr to go over the wire
  * @task: The current task
- * @calldata: pageio data to prepare
+ * @calldata: pageio header to prepare
  */
 static void nfs_pgio_prepare(struct rpc_task *task, void *calldata)
 {
-	struct nfs_pgio_data *data = calldata;
+	struct nfs_pgio_header *hdr = calldata;
 	int err;
-	err = NFS_PROTO(data->header->inode)->pgio_rpc_prepare(task, data);
+	err = NFS_PROTO(hdr->inode)->pgio_rpc_prepare(task, hdr);
 	if (err)
 		rpc_exit(task, err);
 }
 
-int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_data *data,
+int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
 		      const struct rpc_call_ops *call_ops, int how, int flags)
 {
 	struct rpc_task *task;
 	struct rpc_message msg = {
-		.rpc_argp = &data->args,
-		.rpc_resp = &data->res,
-		.rpc_cred = data->header->cred,
+		.rpc_argp = &hdr->args,
+		.rpc_resp = &hdr->res,
+		.rpc_cred = hdr->cred,
 	};
 	struct rpc_task_setup task_setup_data = {
 		.rpc_client = clnt,
-		.task = &data->task,
+		.task = &hdr->task,
 		.rpc_message = &msg,
 		.callback_ops = call_ops,
-		.callback_data = data,
+		.callback_data = hdr,
 		.workqueue = nfsiod_workqueue,
 		.flags = RPC_TASK_ASYNC | flags,
 	};
 	int ret = 0;
 
-	data->header->rw_ops->rw_initiate(data, &msg, &task_setup_data, how);
+	hdr->rw_ops->rw_initiate(hdr, &msg, &task_setup_data, how);
 
 	dprintk("NFS: %5u initiated pgio call "
 		"(req %s/%llu, %u bytes @ offset %llu)\n",
-		data->task.tk_pid,
-		data->header->inode->i_sb->s_id,
-		(unsigned long long)NFS_FILEID(data->header->inode),
-		data->args.count,
-		(unsigned long long)data->args.offset);
+		hdr->task.tk_pid,
+		hdr->inode->i_sb->s_id,
+		(unsigned long long)NFS_FILEID(hdr->inode),
+		hdr->args.count,
+		(unsigned long long)hdr->args.offset);
 
 	task = rpc_run_task(&task_setup_data);
 	if (IS_ERR(task)) {
@@ -657,22 +614,23 @@
 			  struct nfs_pgio_header *hdr)
 {
 	set_bit(NFS_IOHDR_REDO, &hdr->flags);
-	nfs_pgio_data_release(hdr->data);
-	hdr->data = NULL;
+	nfs_pgio_data_destroy(hdr);
+	hdr->completion_ops->completion(hdr);
 	desc->pg_completion_ops->error_cleanup(&desc->pg_list);
 	return -ENOMEM;
 }
 
 /**
  * nfs_pgio_release - Release pageio data
- * @calldata: The pageio data to release
+ * @calldata: The pageio header to release
  */
 static void nfs_pgio_release(void *calldata)
 {
-	struct nfs_pgio_data *data = calldata;
-	if (data->header->rw_ops->rw_release)
-		data->header->rw_ops->rw_release(data);
-	nfs_pgio_data_release(data);
+	struct nfs_pgio_header *hdr = calldata;
+	if (hdr->rw_ops->rw_release)
+		hdr->rw_ops->rw_release(hdr);
+	nfs_pgio_data_destroy(hdr);
+	hdr->completion_ops->completion(hdr);
 }
 
 /**
@@ -713,22 +671,22 @@
 /**
  * nfs_pgio_result - Basic pageio error handling
  * @task: The task that ran
- * @calldata: Pageio data to check
+ * @calldata: Pageio header to check
  */
 static void nfs_pgio_result(struct rpc_task *task, void *calldata)
 {
-	struct nfs_pgio_data *data = calldata;
-	struct inode *inode = data->header->inode;
+	struct nfs_pgio_header *hdr = calldata;
+	struct inode *inode = hdr->inode;
 
 	dprintk("NFS: %s: %5u, (status %d)\n", __func__,
 		task->tk_pid, task->tk_status);
 
-	if (data->header->rw_ops->rw_done(task, data, inode) != 0)
+	if (hdr->rw_ops->rw_done(task, hdr, inode) != 0)
 		return;
 	if (task->tk_status < 0)
-		nfs_set_pgio_error(data->header, task->tk_status, data->args.offset);
+		nfs_set_pgio_error(hdr, task->tk_status, hdr->args.offset);
 	else
-		data->header->rw_ops->rw_result(task, data);
+		hdr->rw_ops->rw_result(task, hdr);
 }
 
 /*
@@ -744,17 +702,16 @@
 {
 	struct nfs_page		*req;
 	struct page		**pages;
-	struct nfs_pgio_data	*data;
 	struct list_head *head = &desc->pg_list;
 	struct nfs_commit_info cinfo;
+	unsigned int pagecount;
 
-	data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base,
-							   desc->pg_count));
-	if (!data)
+	pagecount = nfs_page_array_len(desc->pg_base, desc->pg_count);
+	if (!nfs_pgarray_set(&hdr->page_array, pagecount))
 		return nfs_pgio_error(desc, hdr);
 
 	nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq);
-	pages = data->pages.pagevec;
+	pages = hdr->page_array.pagevec;
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
 		nfs_list_remove_request(req);
@@ -767,8 +724,7 @@
 		desc->pg_ioflags &= ~FLUSH_COND_STABLE;
 
 	/* Set up the argument struct */
-	nfs_pgio_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo);
-	hdr->data = data;
+	nfs_pgio_rpcsetup(hdr, desc->pg_count, 0, desc->pg_ioflags, &cinfo);
 	desc->pg_rpc_callops = &nfs_pgio_common_ops;
 	return 0;
 }
@@ -776,25 +732,20 @@
 
 static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
 {
-	struct nfs_rw_header *rw_hdr;
 	struct nfs_pgio_header *hdr;
 	int ret;
 
-	rw_hdr = nfs_rw_header_alloc(desc->pg_rw_ops);
-	if (!rw_hdr) {
+	hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
+	if (!hdr) {
 		desc->pg_completion_ops->error_cleanup(&desc->pg_list);
 		return -ENOMEM;
 	}
-	hdr = &rw_hdr->header;
-	nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
-	atomic_inc(&hdr->refcnt);
+	nfs_pgheader_init(desc, hdr, nfs_pgio_header_free);
 	ret = nfs_generic_pgio(desc, hdr);
 	if (ret == 0)
 		ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode),
-					hdr->data, desc->pg_rpc_callops,
+					hdr, desc->pg_rpc_callops,
 					desc->pg_ioflags, 0);
-	if (atomic_dec_and_test(&hdr->refcnt))
-		hdr->completion_ops->completion(hdr);
 	return ret;
 }
 
@@ -907,8 +858,13 @@
 	struct nfs_page *subreq;
 	unsigned int bytes_left = 0;
 	unsigned int offset, pgbase;
+	int ret;
 
-	nfs_page_group_lock(req);
+	ret = nfs_page_group_lock(req, false);
+	if (ret < 0) {
+		desc->pg_error = ret;
+		return 0;
+	}
 
 	subreq = req;
 	bytes_left = subreq->wb_bytes;
@@ -930,7 +886,11 @@
 			if (desc->pg_recoalesce)
 				return 0;
 			/* retry add_request for this subreq */
-			nfs_page_group_lock(req);
+			ret = nfs_page_group_lock(req, false);
+			if (ret < 0) {
+				desc->pg_error = ret;
+				return 0;
+			}
 			continue;
 		}
 
@@ -1005,7 +965,38 @@
 	} while (ret);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(nfs_pageio_add_request);
+
+/*
+ * nfs_pageio_resend - Transfer requests to new descriptor and resend
+ * @hdr - the pgio header to move request from
+ * @desc - the pageio descriptor to add requests to
+ *
+ * Try to move each request (nfs_page) from @hdr to @desc then attempt
+ * to send them.
+ *
+ * Returns 0 on success and < 0 on error.
+ */
+int nfs_pageio_resend(struct nfs_pageio_descriptor *desc,
+		      struct nfs_pgio_header *hdr)
+{
+	LIST_HEAD(failed);
+
+	desc->pg_dreq = hdr->dreq;
+	while (!list_empty(&hdr->pages)) {
+		struct nfs_page *req = nfs_list_entry(hdr->pages.next);
+
+		nfs_list_remove_request(req);
+		if (!nfs_pageio_add_request(desc, req))
+			nfs_list_add_request(req, &failed);
+	}
+	nfs_pageio_complete(desc);
+	if (!list_empty(&failed)) {
+		list_move(&failed, &hdr->pages);
+		return -EIO;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nfs_pageio_resend);
 
 /**
  * nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor
@@ -1021,7 +1012,6 @@
 			break;
 	}
 }
-EXPORT_SYMBOL_GPL(nfs_pageio_complete);
 
 /**
  * nfs_pageio_cond_complete - Conditional I/O completion
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index a8914b3..a3851de 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -361,6 +361,23 @@
 }
 EXPORT_SYMBOL_GPL(pnfs_put_lseg);
 
+static void pnfs_put_lseg_async_work(struct work_struct *work)
+{
+	struct pnfs_layout_segment *lseg;
+
+	lseg = container_of(work, struct pnfs_layout_segment, pls_work);
+
+	pnfs_put_lseg(lseg);
+}
+
+void
+pnfs_put_lseg_async(struct pnfs_layout_segment *lseg)
+{
+	INIT_WORK(&lseg->pls_work, pnfs_put_lseg_async_work);
+	schedule_work(&lseg->pls_work);
+}
+EXPORT_SYMBOL_GPL(pnfs_put_lseg_async);
+
 static u64
 end_offset(u64 start, u64 len)
 {
@@ -1470,41 +1487,19 @@
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
 
-int pnfs_write_done_resend_to_mds(struct inode *inode,
-				struct list_head *head,
-				const struct nfs_pgio_completion_ops *compl_ops,
-				struct nfs_direct_req *dreq)
+int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr)
 {
 	struct nfs_pageio_descriptor pgio;
-	LIST_HEAD(failed);
 
 	/* Resend all requests through the MDS */
-	nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, true, compl_ops);
-	pgio.pg_dreq = dreq;
-	while (!list_empty(head)) {
-		struct nfs_page *req = nfs_list_entry(head->next);
-
-		nfs_list_remove_request(req);
-		if (!nfs_pageio_add_request(&pgio, req))
-			nfs_list_add_request(req, &failed);
-	}
-	nfs_pageio_complete(&pgio);
-
-	if (!list_empty(&failed)) {
-		/* For some reason our attempt to resend pages. Mark the
-		 * overall send request as having failed, and let
-		 * nfs_writeback_release_full deal with the error.
-		 */
-		list_move(&failed, head);
-		return -EIO;
-	}
-	return 0;
+	nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true,
+			      hdr->completion_ops);
+	return nfs_pageio_resend(&pgio, hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds);
 
-static void pnfs_ld_handle_write_error(struct nfs_pgio_data *data)
+static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
 
 	dprintk("pnfs write error = %d\n", hdr->pnfs_error);
 	if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags &
@@ -1512,50 +1507,42 @@
 		pnfs_return_layout(hdr->inode);
 	}
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
-		data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
-							&hdr->pages,
-							hdr->completion_ops,
-							hdr->dreq);
+		hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr);
 }
 
 /*
  * Called by non rpc-based layout drivers
  */
-void pnfs_ld_write_done(struct nfs_pgio_data *data)
+void pnfs_ld_write_done(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
-	trace_nfs4_pnfs_write(data, hdr->pnfs_error);
+	trace_nfs4_pnfs_write(hdr, hdr->pnfs_error);
 	if (!hdr->pnfs_error) {
-		pnfs_set_layoutcommit(data);
-		hdr->mds_ops->rpc_call_done(&data->task, data);
+		pnfs_set_layoutcommit(hdr);
+		hdr->mds_ops->rpc_call_done(&hdr->task, hdr);
 	} else
-		pnfs_ld_handle_write_error(data);
-	hdr->mds_ops->rpc_release(data);
+		pnfs_ld_handle_write_error(hdr);
+	hdr->mds_ops->rpc_release(hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_ld_write_done);
 
 static void
 pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
-		struct nfs_pgio_data *data)
+		struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
 		list_splice_tail_init(&hdr->pages, &desc->pg_list);
 		nfs_pageio_reset_write_mds(desc);
 		desc->pg_recoalesce = 1;
 	}
-	nfs_pgio_data_release(data);
+	nfs_pgio_data_destroy(hdr);
 }
 
 static enum pnfs_try_status
-pnfs_try_to_write_data(struct nfs_pgio_data *wdata,
+pnfs_try_to_write_data(struct nfs_pgio_header *hdr,
 			const struct rpc_call_ops *call_ops,
 			struct pnfs_layout_segment *lseg,
 			int how)
 {
-	struct nfs_pgio_header *hdr = wdata->header;
 	struct inode *inode = hdr->inode;
 	enum pnfs_try_status trypnfs;
 	struct nfs_server *nfss = NFS_SERVER(inode);
@@ -1563,8 +1550,8 @@
 	hdr->mds_ops = call_ops;
 
 	dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__,
-		inode->i_ino, wdata->args.count, wdata->args.offset, how);
-	trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how);
+		inode->i_ino, hdr->args.count, hdr->args.offset, how);
+	trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how);
 	if (trypnfs != PNFS_NOT_ATTEMPTED)
 		nfs_inc_stats(inode, NFSIOS_PNFS_WRITE);
 	dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs);
@@ -1575,139 +1562,105 @@
 pnfs_do_write(struct nfs_pageio_descriptor *desc,
 	      struct nfs_pgio_header *hdr, int how)
 {
-	struct nfs_pgio_data *data = hdr->data;
 	const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
 	struct pnfs_layout_segment *lseg = desc->pg_lseg;
 	enum pnfs_try_status trypnfs;
 
 	desc->pg_lseg = NULL;
-	trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how);
+	trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how);
 	if (trypnfs == PNFS_NOT_ATTEMPTED)
-		pnfs_write_through_mds(desc, data);
+		pnfs_write_through_mds(desc, hdr);
 	pnfs_put_lseg(lseg);
 }
 
 static void pnfs_writehdr_free(struct nfs_pgio_header *hdr)
 {
 	pnfs_put_lseg(hdr->lseg);
-	nfs_rw_header_free(hdr);
+	nfs_pgio_header_free(hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_writehdr_free);
 
 int
 pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
 {
-	struct nfs_rw_header *whdr;
 	struct nfs_pgio_header *hdr;
 	int ret;
 
-	whdr = nfs_rw_header_alloc(desc->pg_rw_ops);
-	if (!whdr) {
+	hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
+	if (!hdr) {
 		desc->pg_completion_ops->error_cleanup(&desc->pg_list);
 		pnfs_put_lseg(desc->pg_lseg);
 		desc->pg_lseg = NULL;
 		return -ENOMEM;
 	}
-	hdr = &whdr->header;
 	nfs_pgheader_init(desc, hdr, pnfs_writehdr_free);
 	hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
-	atomic_inc(&hdr->refcnt);
 	ret = nfs_generic_pgio(desc, hdr);
 	if (ret != 0) {
 		pnfs_put_lseg(desc->pg_lseg);
 		desc->pg_lseg = NULL;
 	} else
 		pnfs_do_write(desc, hdr, desc->pg_ioflags);
-	if (atomic_dec_and_test(&hdr->refcnt))
-		hdr->completion_ops->completion(hdr);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
 
-int pnfs_read_done_resend_to_mds(struct inode *inode,
-				struct list_head *head,
-				const struct nfs_pgio_completion_ops *compl_ops,
-				struct nfs_direct_req *dreq)
+int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr)
 {
 	struct nfs_pageio_descriptor pgio;
-	LIST_HEAD(failed);
 
 	/* Resend all requests through the MDS */
-	nfs_pageio_init_read(&pgio, inode, true, compl_ops);
-	pgio.pg_dreq = dreq;
-	while (!list_empty(head)) {
-		struct nfs_page *req = nfs_list_entry(head->next);
-
-		nfs_list_remove_request(req);
-		if (!nfs_pageio_add_request(&pgio, req))
-			nfs_list_add_request(req, &failed);
-	}
-	nfs_pageio_complete(&pgio);
-
-	if (!list_empty(&failed)) {
-		list_move(&failed, head);
-		return -EIO;
-	}
-	return 0;
+	nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops);
+	return nfs_pageio_resend(&pgio, hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds);
 
-static void pnfs_ld_handle_read_error(struct nfs_pgio_data *data)
+static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
 	dprintk("pnfs read error = %d\n", hdr->pnfs_error);
 	if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags &
 	    PNFS_LAYOUTRET_ON_ERROR) {
 		pnfs_return_layout(hdr->inode);
 	}
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
-		data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
-							&hdr->pages,
-							hdr->completion_ops,
-							hdr->dreq);
+		hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr);
 }
 
 /*
  * Called by non rpc-based layout drivers
  */
-void pnfs_ld_read_done(struct nfs_pgio_data *data)
+void pnfs_ld_read_done(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
-	trace_nfs4_pnfs_read(data, hdr->pnfs_error);
+	trace_nfs4_pnfs_read(hdr, hdr->pnfs_error);
 	if (likely(!hdr->pnfs_error)) {
-		__nfs4_read_done_cb(data);
-		hdr->mds_ops->rpc_call_done(&data->task, data);
+		__nfs4_read_done_cb(hdr);
+		hdr->mds_ops->rpc_call_done(&hdr->task, hdr);
 	} else
-		pnfs_ld_handle_read_error(data);
-	hdr->mds_ops->rpc_release(data);
+		pnfs_ld_handle_read_error(hdr);
+	hdr->mds_ops->rpc_release(hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_ld_read_done);
 
 static void
 pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
-		struct nfs_pgio_data *data)
+		struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
 	if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
 		list_splice_tail_init(&hdr->pages, &desc->pg_list);
 		nfs_pageio_reset_read_mds(desc);
 		desc->pg_recoalesce = 1;
 	}
-	nfs_pgio_data_release(data);
+	nfs_pgio_data_destroy(hdr);
 }
 
 /*
  * Call the appropriate parallel I/O subsystem read function.
  */
 static enum pnfs_try_status
-pnfs_try_to_read_data(struct nfs_pgio_data *rdata,
+pnfs_try_to_read_data(struct nfs_pgio_header *hdr,
 		       const struct rpc_call_ops *call_ops,
 		       struct pnfs_layout_segment *lseg)
 {
-	struct nfs_pgio_header *hdr = rdata->header;
 	struct inode *inode = hdr->inode;
 	struct nfs_server *nfss = NFS_SERVER(inode);
 	enum pnfs_try_status trypnfs;
@@ -1715,9 +1668,9 @@
 	hdr->mds_ops = call_ops;
 
 	dprintk("%s: Reading ino:%lu %u@%llu\n",
-		__func__, inode->i_ino, rdata->args.count, rdata->args.offset);
+		__func__, inode->i_ino, hdr->args.count, hdr->args.offset);
 
-	trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata);
+	trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr);
 	if (trypnfs != PNFS_NOT_ATTEMPTED)
 		nfs_inc_stats(inode, NFSIOS_PNFS_READ);
 	dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs);
@@ -1727,52 +1680,46 @@
 static void
 pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_data *data = hdr->data;
 	const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
 	struct pnfs_layout_segment *lseg = desc->pg_lseg;
 	enum pnfs_try_status trypnfs;
 
 	desc->pg_lseg = NULL;
-	trypnfs = pnfs_try_to_read_data(data, call_ops, lseg);
+	trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg);
 	if (trypnfs == PNFS_NOT_ATTEMPTED)
-		pnfs_read_through_mds(desc, data);
+		pnfs_read_through_mds(desc, hdr);
 	pnfs_put_lseg(lseg);
 }
 
 static void pnfs_readhdr_free(struct nfs_pgio_header *hdr)
 {
 	pnfs_put_lseg(hdr->lseg);
-	nfs_rw_header_free(hdr);
+	nfs_pgio_header_free(hdr);
 }
 EXPORT_SYMBOL_GPL(pnfs_readhdr_free);
 
 int
 pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
 {
-	struct nfs_rw_header *rhdr;
 	struct nfs_pgio_header *hdr;
 	int ret;
 
-	rhdr = nfs_rw_header_alloc(desc->pg_rw_ops);
-	if (!rhdr) {
+	hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
+	if (!hdr) {
 		desc->pg_completion_ops->error_cleanup(&desc->pg_list);
 		ret = -ENOMEM;
 		pnfs_put_lseg(desc->pg_lseg);
 		desc->pg_lseg = NULL;
 		return ret;
 	}
-	hdr = &rhdr->header;
 	nfs_pgheader_init(desc, hdr, pnfs_readhdr_free);
 	hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
-	atomic_inc(&hdr->refcnt);
 	ret = nfs_generic_pgio(desc, hdr);
 	if (ret != 0) {
 		pnfs_put_lseg(desc->pg_lseg);
 		desc->pg_lseg = NULL;
 	} else
 		pnfs_do_read(desc, hdr);
-	if (atomic_dec_and_test(&hdr->refcnt))
-		hdr->completion_ops->completion(hdr);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages);
@@ -1820,12 +1767,11 @@
 EXPORT_SYMBOL_GPL(pnfs_set_lo_fail);
 
 void
-pnfs_set_layoutcommit(struct nfs_pgio_data *wdata)
+pnfs_set_layoutcommit(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = wdata->header;
 	struct inode *inode = hdr->inode;
 	struct nfs_inode *nfsi = NFS_I(inode);
-	loff_t end_pos = wdata->mds_offset + wdata->res.count;
+	loff_t end_pos = hdr->mds_offset + hdr->res.count;
 	bool mark_as_dirty = false;
 
 	spin_lock(&inode->i_lock);
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 4fb309a..aca3dff 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -32,6 +32,7 @@
 
 #include <linux/nfs_fs.h>
 #include <linux/nfs_page.h>
+#include <linux/workqueue.h>
 
 enum {
 	NFS_LSEG_VALID = 0,	/* cleared when lseg is recalled/returned */
@@ -46,6 +47,7 @@
 	atomic_t pls_refcount;
 	unsigned long pls_flags;
 	struct pnfs_layout_hdr *pls_layout;
+	struct work_struct pls_work;
 };
 
 enum pnfs_try_status {
@@ -104,6 +106,8 @@
 				  int max);
 	void (*recover_commit_reqs) (struct list_head *list,
 				     struct nfs_commit_info *cinfo);
+	struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
+						struct page *page);
 	int (*commit_pagelist)(struct inode *inode,
 			       struct list_head *mds_pages,
 			       int how,
@@ -113,8 +117,8 @@
 	 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
 	 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
 	 */
-	enum pnfs_try_status (*read_pagelist) (struct nfs_pgio_data *nfs_data);
-	enum pnfs_try_status (*write_pagelist) (struct nfs_pgio_data *nfs_data, int how);
+	enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
+	enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
 
 	void (*free_deviceid_node) (struct nfs4_deviceid_node *);
 
@@ -179,6 +183,7 @@
 /* pnfs.c */
 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
+void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg);
 
 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
 void unset_pnfs_layoutdriver(struct nfs_server *);
@@ -213,13 +218,13 @@
 void pnfs_roc_release(struct inode *ino);
 void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
 bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
-void pnfs_set_layoutcommit(struct nfs_pgio_data *wdata);
+void pnfs_set_layoutcommit(struct nfs_pgio_header *);
 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
 int _pnfs_return_layout(struct inode *);
 int pnfs_commit_and_return_layout(struct inode *);
-void pnfs_ld_write_done(struct nfs_pgio_data *);
-void pnfs_ld_read_done(struct nfs_pgio_data *);
+void pnfs_ld_write_done(struct nfs_pgio_header *);
+void pnfs_ld_read_done(struct nfs_pgio_header *);
 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
 					       struct nfs_open_context *ctx,
 					       loff_t pos,
@@ -228,12 +233,8 @@
 					       gfp_t gfp_flags);
 
 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
-int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
-			const struct nfs_pgio_completion_ops *compl_ops,
-			struct nfs_direct_req *dreq);
-int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
-			const struct nfs_pgio_completion_ops *compl_ops,
-			struct nfs_direct_req *dreq);
+int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
+int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
 
 /* nfs4_deviceid_flags */
@@ -345,6 +346,17 @@
 	NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo);
 }
 
+static inline struct nfs_page *
+pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
+			struct page *page)
+{
+	struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
+
+	if (ld == NULL || ld->search_commit_reqs == NULL)
+		return NULL;
+	return ld->search_commit_reqs(cinfo, page);
+}
+
 /* Should the pNFS client commit and return the layout upon a setattr */
 static inline bool
 pnfs_ld_layoutret_on_setattr(struct inode *inode)
@@ -410,6 +422,10 @@
 {
 }
 
+static inline void pnfs_put_lseg_async(struct pnfs_layout_segment *lseg)
+{
+}
+
 static inline int pnfs_return_layout(struct inode *ino)
 {
 	return 0;
@@ -496,6 +512,13 @@
 {
 }
 
+static inline struct nfs_page *
+pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
+			struct page *page)
+{
+	return NULL;
+}
+
 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
 {
 	return 0;
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index c171ce1..b09cc23 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -578,46 +578,49 @@
 	return 0;
 }
 
-static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 
 	nfs_invalidate_atime(inode);
 	if (task->tk_status >= 0) {
-		nfs_refresh_inode(inode, data->res.fattr);
+		nfs_refresh_inode(inode, hdr->res.fattr);
 		/* Emulate the eof flag, which isn't normally needed in NFSv2
 		 * as it is guaranteed to always return the file attributes
 		 */
-		if (data->args.offset + data->res.count >= data->res.fattr->size)
-			data->res.eof = 1;
+		if (hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
+			hdr->res.eof = 1;
 	}
 	return 0;
 }
 
-static void nfs_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs_proc_read_setup(struct nfs_pgio_header *hdr,
+				struct rpc_message *msg)
 {
 	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
 }
 
-static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task,
+				     struct nfs_pgio_header *hdr)
 {
 	rpc_call_start(task);
 	return 0;
 }
 
-static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_data *data)
+static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 
 	if (task->tk_status >= 0)
-		nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
+		nfs_post_op_update_inode_force_wcc(inode, hdr->res.fattr);
 	return 0;
 }
 
-static void nfs_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
+static void nfs_proc_write_setup(struct nfs_pgio_header *hdr,
+				 struct rpc_message *msg)
 {
 	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
-	data->args.stable = NFS_FILE_SYNC;
+	hdr->args.stable = NFS_FILE_SYNC;
 	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
 }
 
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index e818a47..beff276 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -33,12 +33,12 @@
 
 static struct kmem_cache *nfs_rdata_cachep;
 
-static struct nfs_rw_header *nfs_readhdr_alloc(void)
+static struct nfs_pgio_header *nfs_readhdr_alloc(void)
 {
 	return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
 }
 
-static void nfs_readhdr_free(struct nfs_rw_header *rhdr)
+static void nfs_readhdr_free(struct nfs_pgio_header *rhdr)
 {
 	kmem_cache_free(nfs_rdata_cachep, rhdr);
 }
@@ -115,12 +115,6 @@
 
 		unlock_page(req->wb_page);
 	}
-
-	dprintk("NFS: read done (%s/%Lu %d@%Ld)\n",
-			req->wb_context->dentry->d_inode->i_sb->s_id,
-			(unsigned long long)NFS_FILEID(req->wb_context->dentry->d_inode),
-			req->wb_bytes,
-			(long long)req_offset(req));
 	nfs_release_request(req);
 }
 
@@ -172,14 +166,15 @@
 	hdr->release(hdr);
 }
 
-static void nfs_initiate_read(struct nfs_pgio_data *data, struct rpc_message *msg,
+static void nfs_initiate_read(struct nfs_pgio_header *hdr,
+			      struct rpc_message *msg,
 			      struct rpc_task_setup *task_setup_data, int how)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 	int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;
 
 	task_setup_data->flags |= swap_flags;
-	NFS_PROTO(inode)->read_setup(data, msg);
+	NFS_PROTO(inode)->read_setup(hdr, msg);
 }
 
 static void
@@ -203,14 +198,15 @@
  * This is the callback from RPC telling us whether a reply was
  * received or some error occurred (timeout or socket shutdown).
  */
-static int nfs_readpage_done(struct rpc_task *task, struct nfs_pgio_data *data,
+static int nfs_readpage_done(struct rpc_task *task,
+			     struct nfs_pgio_header *hdr,
 			     struct inode *inode)
 {
-	int status = NFS_PROTO(inode)->read_done(task, data);
+	int status = NFS_PROTO(inode)->read_done(task, hdr);
 	if (status != 0)
 		return status;
 
-	nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, data->res.count);
+	nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, hdr->res.count);
 
 	if (task->tk_status == -ESTALE) {
 		set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
@@ -219,34 +215,34 @@
 	return 0;
 }
 
-static void nfs_readpage_retry(struct rpc_task *task, struct nfs_pgio_data *data)
+static void nfs_readpage_retry(struct rpc_task *task,
+			       struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_args *argp = &data->args;
-	struct nfs_pgio_res  *resp = &data->res;
+	struct nfs_pgio_args *argp = &hdr->args;
+	struct nfs_pgio_res  *resp = &hdr->res;
 
 	/* This is a short read! */
-	nfs_inc_stats(data->header->inode, NFSIOS_SHORTREAD);
+	nfs_inc_stats(hdr->inode, NFSIOS_SHORTREAD);
 	/* Has the server at least made some progress? */
 	if (resp->count == 0) {
-		nfs_set_pgio_error(data->header, -EIO, argp->offset);
+		nfs_set_pgio_error(hdr, -EIO, argp->offset);
 		return;
 	}
-	/* Yes, so retry the read at the end of the data */
-	data->mds_offset += resp->count;
+	/* Yes, so retry the read at the end of the hdr */
+	hdr->mds_offset += resp->count;
 	argp->offset += resp->count;
 	argp->pgbase += resp->count;
 	argp->count -= resp->count;
 	rpc_restart_call_prepare(task);
 }
 
-static void nfs_readpage_result(struct rpc_task *task, struct nfs_pgio_data *data)
+static void nfs_readpage_result(struct rpc_task *task,
+				struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-
-	if (data->res.eof) {
+	if (hdr->res.eof) {
 		loff_t bound;
 
-		bound = data->args.offset + data->res.count;
+		bound = hdr->args.offset + hdr->res.count;
 		spin_lock(&hdr->lock);
 		if (bound < hdr->io_start + hdr->good_bytes) {
 			set_bit(NFS_IOHDR_EOF, &hdr->flags);
@@ -254,8 +250,8 @@
 			hdr->good_bytes = bound - hdr->io_start;
 		}
 		spin_unlock(&hdr->lock);
-	} else if (data->res.count != data->args.count)
-		nfs_readpage_retry(task, data);
+	} else if (hdr->res.count != hdr->args.count)
+		nfs_readpage_retry(task, hdr);
 }
 
 /*
@@ -404,7 +400,7 @@
 int __init nfs_init_readpagecache(void)
 {
 	nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
-					     sizeof(struct nfs_rw_header),
+					     sizeof(struct nfs_pgio_header),
 					     0, SLAB_HWCACHE_ALIGN,
 					     NULL);
 	if (nfs_rdata_cachep == NULL)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 084af10..e4499d5 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1027,8 +1027,7 @@
 			      rpc_authflavor_t flavor)
 {
 	unsigned int i;
-	unsigned int max_flavor_len = (sizeof(auth_info->flavors) /
-				       sizeof(auth_info->flavors[0]));
+	unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors);
 
 	/* make sure this flavor isn't already in the list */
 	for (i = 0; i < auth_info->flavor_len; i++) {
@@ -2180,7 +2179,7 @@
 	return -EINVAL;
 }
 
-#define NFS_MOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \
+#define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \
 		| NFS_MOUNT_SECURE \
 		| NFS_MOUNT_TCP \
 		| NFS_MOUNT_VER3 \
@@ -2188,15 +2187,16 @@
 		| NFS_MOUNT_NONLM \
 		| NFS_MOUNT_BROKEN_SUID \
 		| NFS_MOUNT_STRICTLOCK \
-		| NFS_MOUNT_UNSHARED \
-		| NFS_MOUNT_NORESVPORT \
 		| NFS_MOUNT_LEGACY_INTERFACE)
 
+#define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \
+		~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT))
+
 static int
 nfs_compare_remount_data(struct nfs_server *nfss,
 			 struct nfs_parsed_mount_data *data)
 {
-	if ((data->flags ^ nfss->flags) & NFS_MOUNT_CMP_FLAGMASK ||
+	if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK ||
 	    data->rsize != nfss->rsize ||
 	    data->wsize != nfss->wsize ||
 	    data->version != nfss->nfs_client->rpc_ops->version ||
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 962c9ee..e3b5cf2 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -47,6 +47,8 @@
 static const struct nfs_commit_completion_ops nfs_commit_completion_ops;
 static const struct nfs_rw_ops nfs_rw_write_ops;
 static void nfs_clear_request_commit(struct nfs_page *req);
+static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo,
+				      struct inode *inode);
 
 static struct kmem_cache *nfs_wdata_cachep;
 static mempool_t *nfs_wdata_mempool;
@@ -71,18 +73,18 @@
 }
 EXPORT_SYMBOL_GPL(nfs_commit_free);
 
-static struct nfs_rw_header *nfs_writehdr_alloc(void)
+static struct nfs_pgio_header *nfs_writehdr_alloc(void)
 {
-	struct nfs_rw_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
+	struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
 
 	if (p)
 		memset(p, 0, sizeof(*p));
 	return p;
 }
 
-static void nfs_writehdr_free(struct nfs_rw_header *whdr)
+static void nfs_writehdr_free(struct nfs_pgio_header *hdr)
 {
-	mempool_free(whdr, nfs_wdata_mempool);
+	mempool_free(hdr, nfs_wdata_mempool);
 }
 
 static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
@@ -93,6 +95,38 @@
 }
 
 /*
+ * nfs_page_search_commits_for_head_request_locked
+ *
+ * Search through commit lists on @inode for the head request for @page.
+ * Must be called while holding the inode (which is cinfo) lock.
+ *
+ * Returns the head request if found, or NULL if not found.
+ */
+static struct nfs_page *
+nfs_page_search_commits_for_head_request_locked(struct nfs_inode *nfsi,
+						struct page *page)
+{
+	struct nfs_page *freq, *t;
+	struct nfs_commit_info cinfo;
+	struct inode *inode = &nfsi->vfs_inode;
+
+	nfs_init_cinfo_from_inode(&cinfo, inode);
+
+	/* search through pnfs commit lists */
+	freq = pnfs_search_commit_reqs(inode, &cinfo, page);
+	if (freq)
+		return freq->wb_head;
+
+	/* Linearly search the commit list for the correct request */
+	list_for_each_entry_safe(freq, t, &cinfo.mds->list, wb_list) {
+		if (freq->wb_page == page)
+			return freq->wb_head;
+	}
+
+	return NULL;
+}
+
+/*
  * nfs_page_find_head_request_locked - find head request associated with @page
  *
  * must be called while holding the inode lock.
@@ -106,21 +140,12 @@
 
 	if (PagePrivate(page))
 		req = (struct nfs_page *)page_private(page);
-	else if (unlikely(PageSwapCache(page))) {
-		struct nfs_page *freq, *t;
-
-		/* Linearly search the commit list for the correct req */
-		list_for_each_entry_safe(freq, t, &nfsi->commit_info.list, wb_list) {
-			if (freq->wb_page == page) {
-				req = freq->wb_head;
-				break;
-			}
-		}
-	}
+	else if (unlikely(PageSwapCache(page)))
+		req = nfs_page_search_commits_for_head_request_locked(nfsi,
+			page);
 
 	if (req) {
 		WARN_ON_ONCE(req->wb_head != req);
-
 		kref_get(&req->wb_kref);
 	}
 
@@ -216,7 +241,7 @@
 	unsigned int pos = 0;
 	unsigned int len = nfs_page_length(req->wb_page);
 
-	nfs_page_group_lock(req);
+	nfs_page_group_lock(req, true);
 
 	do {
 		tmp = nfs_page_group_search_locked(req->wb_head, pos);
@@ -379,8 +404,6 @@
 		subreq->wb_head = subreq;
 		subreq->wb_this_page = subreq;
 
-		nfs_clear_request_commit(subreq);
-
 		/* subreq is now totally disconnected from page group or any
 		 * write / commit lists. last chance to wake any waiters */
 		nfs_unlock_request(subreq);
@@ -456,7 +479,9 @@
 	}
 
 	/* lock each request in the page group */
-	nfs_page_group_lock(head);
+	ret = nfs_page_group_lock(head, false);
+	if (ret < 0)
+		return ERR_PTR(ret);
 	subreq = head;
 	do {
 		/*
@@ -488,7 +513,7 @@
 	 * Commit list removal accounting is done after locks are dropped */
 	subreq = head;
 	do {
-		nfs_list_remove_request(subreq);
+		nfs_clear_request_commit(subreq);
 		subreq = subreq->wb_this_page;
 	} while (subreq != head);
 
@@ -518,15 +543,11 @@
 
 	nfs_page_group_unlock(head);
 
-	/* drop lock to clear_request_commit the head req and clean up
-	 * requests on destroy list */
+	/* drop lock to clean uprequests on destroy list */
 	spin_unlock(&inode->i_lock);
 
 	nfs_destroy_unlinked_subrequests(destroy_list, head);
 
-	/* clean up commit list state */
-	nfs_clear_request_commit(head);
-
 	/* still holds ref on head from nfs_page_find_head_request_locked
 	 * and still has lock on head from lock loop */
 	return head;
@@ -705,6 +726,8 @@
 
 	if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags))
 		nfs_release_request(req);
+	else
+		WARN_ON_ONCE(1);
 }
 
 static void
@@ -808,6 +831,7 @@
 	dec_bdi_stat(page_file_mapping(page)->backing_dev_info, BDI_RECLAIMABLE);
 }
 
+/* Called holding inode (/cinfo) lock */
 static void
 nfs_clear_request_commit(struct nfs_page *req)
 {
@@ -817,20 +841,17 @@
 
 		nfs_init_cinfo_from_inode(&cinfo, inode);
 		if (!pnfs_clear_request_commit(req, &cinfo)) {
-			spin_lock(cinfo.lock);
 			nfs_request_remove_commit_list(req, &cinfo);
-			spin_unlock(cinfo.lock);
 		}
 		nfs_clear_page_commit(req->wb_page);
 	}
 }
 
-static inline
-int nfs_write_need_commit(struct nfs_pgio_data *data)
+int nfs_write_need_commit(struct nfs_pgio_header *hdr)
 {
-	if (data->verf.committed == NFS_DATA_SYNC)
-		return data->header->lseg == NULL;
-	return data->verf.committed != NFS_FILE_SYNC;
+	if (hdr->verf.committed == NFS_DATA_SYNC)
+		return hdr->lseg == NULL;
+	return hdr->verf.committed != NFS_FILE_SYNC;
 }
 
 #else
@@ -856,8 +877,7 @@
 {
 }
 
-static inline
-int nfs_write_need_commit(struct nfs_pgio_data *data)
+int nfs_write_need_commit(struct nfs_pgio_header *hdr)
 {
 	return 0;
 }
@@ -883,11 +903,7 @@
 			nfs_context_set_write_error(req->wb_context, hdr->error);
 			goto remove_req;
 		}
-		if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) {
-			nfs_mark_request_dirty(req);
-			goto next;
-		}
-		if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) {
+		if (nfs_write_need_commit(hdr)) {
 			memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
 			nfs_mark_request_commit(req, hdr->lseg, &cinfo);
 			goto next;
@@ -1038,9 +1054,9 @@
 	else
 		req->wb_bytes = rqend - req->wb_offset;
 out_unlock:
-	spin_unlock(&inode->i_lock);
 	if (req)
 		nfs_clear_request_commit(req);
+	spin_unlock(&inode->i_lock);
 	return req;
 out_flushme:
 	spin_unlock(&inode->i_lock);
@@ -1241,17 +1257,18 @@
 	return RPC_PRIORITY_NORMAL;
 }
 
-static void nfs_initiate_write(struct nfs_pgio_data *data, struct rpc_message *msg,
+static void nfs_initiate_write(struct nfs_pgio_header *hdr,
+			       struct rpc_message *msg,
 			       struct rpc_task_setup *task_setup_data, int how)
 {
-	struct inode *inode = data->header->inode;
+	struct inode *inode = hdr->inode;
 	int priority = flush_task_priority(how);
 
 	task_setup_data->priority = priority;
-	NFS_PROTO(inode)->write_setup(data, msg);
+	NFS_PROTO(inode)->write_setup(hdr, msg);
 
 	nfs4_state_protect_write(NFS_SERVER(inode)->nfs_client,
-				 &task_setup_data->rpc_client, msg, data);
+				 &task_setup_data->rpc_client, msg, hdr);
 }
 
 /* If a nfs_flush_* function fails, it should remove reqs from @head and
@@ -1313,21 +1330,9 @@
 	NFS_PROTO(data->inode)->commit_rpc_prepare(task, data);
 }
 
-static void nfs_writeback_release_common(struct nfs_pgio_data *data)
+static void nfs_writeback_release_common(struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_header *hdr = data->header;
-	int status = data->task.tk_status;
-
-	if ((status >= 0) && nfs_write_need_commit(data)) {
-		spin_lock(&hdr->lock);
-		if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags))
-			; /* Do nothing */
-		else if (!test_and_set_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags))
-			memcpy(&hdr->verf, &data->verf, sizeof(hdr->verf));
-		else if (memcmp(&hdr->verf, &data->verf, sizeof(hdr->verf)))
-			set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags);
-		spin_unlock(&hdr->lock);
-	}
+	/* do nothing! */
 }
 
 /*
@@ -1358,7 +1363,8 @@
 /*
  * This function is called when the WRITE call is complete.
  */
-static int nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data,
+static int nfs_writeback_done(struct rpc_task *task,
+			      struct nfs_pgio_header *hdr,
 			      struct inode *inode)
 {
 	int status;
@@ -1370,13 +1376,14 @@
 	 * another writer had changed the file, but some applications
 	 * depend on tighter cache coherency when writing.
 	 */
-	status = NFS_PROTO(inode)->write_done(task, data);
+	status = NFS_PROTO(inode)->write_done(task, hdr);
 	if (status != 0)
 		return status;
-	nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, data->res.count);
+	nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, hdr->res.count);
 
 #if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
-	if (data->res.verf->committed < data->args.stable && task->tk_status >= 0) {
+	if (hdr->res.verf->committed < hdr->args.stable &&
+	    task->tk_status >= 0) {
 		/* We tried a write call, but the server did not
 		 * commit data to stable storage even though we
 		 * requested it.
@@ -1392,7 +1399,7 @@
 			dprintk("NFS:       faulty NFS server %s:"
 				" (committed = %d) != (stable = %d)\n",
 				NFS_SERVER(inode)->nfs_client->cl_hostname,
-				data->res.verf->committed, data->args.stable);
+				hdr->res.verf->committed, hdr->args.stable);
 			complain = jiffies + 300 * HZ;
 		}
 	}
@@ -1407,16 +1414,17 @@
 /*
  * This function is called when the WRITE call is complete.
  */
-static void nfs_writeback_result(struct rpc_task *task, struct nfs_pgio_data *data)
+static void nfs_writeback_result(struct rpc_task *task,
+				 struct nfs_pgio_header *hdr)
 {
-	struct nfs_pgio_args	*argp = &data->args;
-	struct nfs_pgio_res	*resp = &data->res;
+	struct nfs_pgio_args	*argp = &hdr->args;
+	struct nfs_pgio_res	*resp = &hdr->res;
 
 	if (resp->count < argp->count) {
 		static unsigned long    complain;
 
 		/* This a short write! */
-		nfs_inc_stats(data->header->inode, NFSIOS_SHORTWRITE);
+		nfs_inc_stats(hdr->inode, NFSIOS_SHORTWRITE);
 
 		/* Has the server at least made some progress? */
 		if (resp->count == 0) {
@@ -1426,14 +1434,14 @@
 				       argp->count);
 				complain = jiffies + 300 * HZ;
 			}
-			nfs_set_pgio_error(data->header, -EIO, argp->offset);
+			nfs_set_pgio_error(hdr, -EIO, argp->offset);
 			task->tk_status = -EIO;
 			return;
 		}
 		/* Was this an NFSv2 write or an NFSv3 stable write? */
 		if (resp->verf->committed != NFS_UNSTABLE) {
 			/* Resend from where the server left off */
-			data->mds_offset += resp->count;
+			hdr->mds_offset += resp->count;
 			argp->offset += resp->count;
 			argp->pgbase += resp->count;
 			argp->count -= resp->count;
@@ -1884,7 +1892,7 @@
 int __init nfs_init_writepagecache(void)
 {
 	nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
-					     sizeof(struct nfs_rw_header),
+					     sizeof(struct nfs_pgio_header),
 					     0, SLAB_HWCACHE_ALIGN,
 					     NULL);
 	if (nfs_wdata_cachep == NULL)
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index ed628f7..538f142 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -30,9 +30,6 @@
 
 MODULE_LICENSE("GPL");
 
-EXPORT_SYMBOL_GPL(nfsacl_encode);
-EXPORT_SYMBOL_GPL(nfsacl_decode);
-
 struct nfsacl_encode_desc {
 	struct xdr_array2_desc desc;
 	unsigned int count;
@@ -136,6 +133,7 @@
 			  nfsacl_desc.desc.array_len;
 	return err;
 }
+EXPORT_SYMBOL_GPL(nfsacl_encode);
 
 struct nfsacl_decode_desc {
 	struct xdr_array2_desc desc;
@@ -295,3 +293,4 @@
 	return 8 + nfsacl_desc.desc.elem_size *
 		   nfsacl_desc.desc.array_len;
 }
+EXPORT_SYMBOL_GPL(nfsacl_decode);
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index c519927..228f5bd 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -942,7 +942,7 @@
 			iput(inode);
 		}
 	} else {
-		dentry = d_obtain_alias(inode);
+		dentry = d_obtain_root(inode);
 		if (IS_ERR(dentry)) {
 			ret = PTR_ERR(dentry);
 			goto failed_dentry;
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 7f30bdc..f2d0eee 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -96,13 +96,16 @@
  * Note that some things (eg. sb pointer, type, id) doesn't change during
  * the life of the dquot structure and so needn't to be protected by a lock
  *
- * Any operation working on dquots via inode pointers must hold dqptr_sem.  If
- * operation is just reading pointers from inode (or not using them at all) the
- * read lock is enough. If pointers are altered function must hold write lock.
+ * Operation accessing dquots via inode pointers are protected by dquot_srcu.
+ * Operation of reading pointer needs srcu_read_lock(&dquot_srcu), and
+ * synchronize_srcu(&dquot_srcu) is called after clearing pointers from
+ * inode and before dropping dquot references to avoid use of dquots after
+ * they are freed. dq_data_lock is used to serialize the pointer setting and
+ * clearing operations.
  * Special care needs to be taken about S_NOQUOTA inode flag (marking that
  * inode is a quota file). Functions adding pointers from inode to dquots have
- * to check this flag under dqptr_sem and then (if S_NOQUOTA is not set) they
- * have to do all pointer modifications before dropping dqptr_sem. This makes
+ * to check this flag under dq_data_lock and then (if S_NOQUOTA is not set) they
+ * have to do all pointer modifications before dropping dq_data_lock. This makes
  * sure they cannot race with quotaon which first sets S_NOQUOTA flag and
  * then drops all pointers to dquots from an inode.
  *
@@ -116,21 +119,15 @@
  * spinlock to internal buffers before writing.
  *
  * Lock ordering (including related VFS locks) is the following:
- *   dqonoff_mutex > i_mutex > journal_lock > dqptr_sem > dquot->dq_lock >
- *   dqio_mutex
+ *   dqonoff_mutex > i_mutex > journal_lock > dquot->dq_lock > dqio_mutex
  * dqonoff_mutex > i_mutex comes from dquot_quota_sync, dquot_enable, etc.
- * The lock ordering of dqptr_sem imposed by quota code is only dqonoff_sem >
- * dqptr_sem. But filesystem has to count with the fact that functions such as
- * dquot_alloc_space() acquire dqptr_sem and they usually have to be called
- * from inside a transaction to keep filesystem consistency after a crash. Also
- * filesystems usually want to do some IO on dquot from ->mark_dirty which is
- * called with dqptr_sem held.
  */
 
 static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_list_lock);
 static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_state_lock);
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_data_lock);
 EXPORT_SYMBOL(dq_data_lock);
+DEFINE_STATIC_SRCU(dquot_srcu);
 
 void __quota_error(struct super_block *sb, const char *func,
 		   const char *fmt, ...)
@@ -733,7 +730,6 @@
 
 /*
  * Put reference to dquot
- * NOTE: If you change this function please check whether dqput_blocks() works right...
  */
 void dqput(struct dquot *dquot)
 {
@@ -963,46 +959,33 @@
 }
 
 /*
- * Return 0 if dqput() won't block.
- * (note that 1 doesn't necessarily mean blocking)
- */
-static inline int dqput_blocks(struct dquot *dquot)
-{
-	if (atomic_read(&dquot->dq_count) <= 1)
-		return 1;
-	return 0;
-}
-
-/*
  * Remove references to dquots from inode and add dquot to list for freeing
  * if we have the last reference to dquot
- * We can't race with anybody because we hold dqptr_sem for writing...
  */
-static int remove_inode_dquot_ref(struct inode *inode, int type,
-				  struct list_head *tofree_head)
+static void remove_inode_dquot_ref(struct inode *inode, int type,
+				   struct list_head *tofree_head)
 {
 	struct dquot *dquot = inode->i_dquot[type];
 
 	inode->i_dquot[type] = NULL;
-	if (dquot) {
-		if (dqput_blocks(dquot)) {
-#ifdef CONFIG_QUOTA_DEBUG
-			if (atomic_read(&dquot->dq_count) != 1)
-				quota_error(inode->i_sb, "Adding dquot with "
-					    "dq_count %d to dispose list",
-					    atomic_read(&dquot->dq_count));
-#endif
-			spin_lock(&dq_list_lock);
-			/* As dquot must have currently users it can't be on
-			 * the free list... */
-			list_add(&dquot->dq_free, tofree_head);
-			spin_unlock(&dq_list_lock);
-			return 1;
-		}
-		else
-			dqput(dquot);   /* We have guaranteed we won't block */
+	if (!dquot)
+		return;
+
+	if (list_empty(&dquot->dq_free)) {
+		/*
+		 * The inode still has reference to dquot so it can't be in the
+		 * free list
+		 */
+		spin_lock(&dq_list_lock);
+		list_add(&dquot->dq_free, tofree_head);
+		spin_unlock(&dq_list_lock);
+	} else {
+		/*
+		 * Dquot is already in a list to put so we won't drop the last
+		 * reference here.
+		 */
+		dqput(dquot);
 	}
-	return 0;
 }
 
 /*
@@ -1037,13 +1020,15 @@
 		 *  We have to scan also I_NEW inodes because they can already
 		 *  have quota pointer initialized. Luckily, we need to touch
 		 *  only quota pointers and these have separate locking
-		 *  (dqptr_sem).
+		 *  (dq_data_lock).
 		 */
+		spin_lock(&dq_data_lock);
 		if (!IS_NOQUOTA(inode)) {
 			if (unlikely(inode_get_rsv_space(inode) > 0))
 				reserved = 1;
 			remove_inode_dquot_ref(inode, type, tofree_head);
 		}
+		spin_unlock(&dq_data_lock);
 	}
 	spin_unlock(&inode_sb_list_lock);
 #ifdef CONFIG_QUOTA_DEBUG
@@ -1061,9 +1046,8 @@
 	LIST_HEAD(tofree_head);
 
 	if (sb->dq_op) {
-		down_write(&sb_dqopt(sb)->dqptr_sem);
 		remove_dquot_ref(sb, type, &tofree_head);
-		up_write(&sb_dqopt(sb)->dqptr_sem);
+		synchronize_srcu(&dquot_srcu);
 		put_dquot_list(&tofree_head);
 	}
 }
@@ -1394,21 +1378,16 @@
 /*
  * Initialize quota pointers in inode
  *
- * We do things in a bit complicated way but by that we avoid calling
- * dqget() and thus filesystem callbacks under dqptr_sem.
- *
  * It is better to call this function outside of any transaction as it
  * might need a lot of space in journal for dquot structure allocation.
  */
 static void __dquot_initialize(struct inode *inode, int type)
 {
-	int cnt;
+	int cnt, init_needed = 0;
 	struct dquot *got[MAXQUOTAS];
 	struct super_block *sb = inode->i_sb;
 	qsize_t rsv;
 
-	/* First test before acquiring mutex - solves deadlocks when we
-         * re-enter the quota code and are already holding the mutex */
 	if (!dquot_active(inode))
 		return;
 
@@ -1418,6 +1397,15 @@
 		got[cnt] = NULL;
 		if (type != -1 && cnt != type)
 			continue;
+		/*
+		 * The i_dquot should have been initialized in most cases,
+		 * we check it without locking here to avoid unnecessary
+		 * dqget()/dqput() calls.
+		 */
+		if (inode->i_dquot[cnt])
+			continue;
+		init_needed = 1;
+
 		switch (cnt) {
 		case USRQUOTA:
 			qid = make_kqid_uid(inode->i_uid);
@@ -1429,7 +1417,11 @@
 		got[cnt] = dqget(sb, qid);
 	}
 
-	down_write(&sb_dqopt(sb)->dqptr_sem);
+	/* All required i_dquot has been initialized */
+	if (!init_needed)
+		return;
+
+	spin_lock(&dq_data_lock);
 	if (IS_NOQUOTA(inode))
 		goto out_err;
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
@@ -1449,15 +1441,12 @@
 			 * did a write before quota was turned on
 			 */
 			rsv = inode_get_rsv_space(inode);
-			if (unlikely(rsv)) {
-				spin_lock(&dq_data_lock);
+			if (unlikely(rsv))
 				dquot_resv_space(inode->i_dquot[cnt], rsv);
-				spin_unlock(&dq_data_lock);
-			}
 		}
 	}
 out_err:
-	up_write(&sb_dqopt(sb)->dqptr_sem);
+	spin_unlock(&dq_data_lock);
 	/* Drop unused references */
 	dqput_all(got);
 }
@@ -1469,19 +1458,24 @@
 EXPORT_SYMBOL(dquot_initialize);
 
 /*
- * 	Release all quotas referenced by inode
+ * Release all quotas referenced by inode.
+ *
+ * This function only be called on inode free or converting
+ * a file to quota file, no other users for the i_dquot in
+ * both cases, so we needn't call synchronize_srcu() after
+ * clearing i_dquot.
  */
 static void __dquot_drop(struct inode *inode)
 {
 	int cnt;
 	struct dquot *put[MAXQUOTAS];
 
-	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		put[cnt] = inode->i_dquot[cnt];
 		inode->i_dquot[cnt] = NULL;
 	}
-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	spin_unlock(&dq_data_lock);
 	dqput_all(put);
 }
 
@@ -1599,15 +1593,11 @@
  */
 int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
 {
-	int cnt, ret = 0;
+	int cnt, ret = 0, index;
 	struct dquot_warn warn[MAXQUOTAS];
 	struct dquot **dquots = inode->i_dquot;
 	int reserve = flags & DQUOT_SPACE_RESERVE;
 
-	/*
-	 * First test before acquiring mutex - solves deadlocks when we
-	 * re-enter the quota code and are already holding the mutex
-	 */
 	if (!dquot_active(inode)) {
 		inode_incr_space(inode, number, reserve);
 		goto out;
@@ -1616,7 +1606,7 @@
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warn[cnt].w_type = QUOTA_NL_NOWARN;
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!dquots[cnt])
@@ -1643,7 +1633,7 @@
 		goto out_flush_warn;
 	mark_all_dquot_dirty(dquots);
 out_flush_warn:
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
 out:
 	return ret;
@@ -1655,17 +1645,16 @@
  */
 int dquot_alloc_inode(const struct inode *inode)
 {
-	int cnt, ret = 0;
+	int cnt, ret = 0, index;
 	struct dquot_warn warn[MAXQUOTAS];
 	struct dquot * const *dquots = inode->i_dquot;
 
-	/* First test before acquiring mutex - solves deadlocks when we
-         * re-enter the quota code and are already holding the mutex */
 	if (!dquot_active(inode))
 		return 0;
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warn[cnt].w_type = QUOTA_NL_NOWARN;
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!dquots[cnt])
@@ -1685,7 +1674,7 @@
 	spin_unlock(&dq_data_lock);
 	if (ret == 0)
 		mark_all_dquot_dirty(dquots);
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
 	return ret;
 }
@@ -1696,14 +1685,14 @@
  */
 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
 {
-	int cnt;
+	int cnt, index;
 
 	if (!dquot_active(inode)) {
 		inode_claim_rsv_space(inode, number);
 		return 0;
 	}
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	/* Claim reserved quotas to allocated quotas */
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
@@ -1715,7 +1704,7 @@
 	inode_claim_rsv_space(inode, number);
 	spin_unlock(&dq_data_lock);
 	mark_all_dquot_dirty(inode->i_dquot);
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	return 0;
 }
 EXPORT_SYMBOL(dquot_claim_space_nodirty);
@@ -1725,14 +1714,14 @@
  */
 void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number)
 {
-	int cnt;
+	int cnt, index;
 
 	if (!dquot_active(inode)) {
 		inode_reclaim_rsv_space(inode, number);
 		return;
 	}
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	/* Claim reserved quotas to allocated quotas */
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
@@ -1744,7 +1733,7 @@
 	inode_reclaim_rsv_space(inode, number);
 	spin_unlock(&dq_data_lock);
 	mark_all_dquot_dirty(inode->i_dquot);
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	return;
 }
 EXPORT_SYMBOL(dquot_reclaim_space_nodirty);
@@ -1757,16 +1746,14 @@
 	unsigned int cnt;
 	struct dquot_warn warn[MAXQUOTAS];
 	struct dquot **dquots = inode->i_dquot;
-	int reserve = flags & DQUOT_SPACE_RESERVE;
+	int reserve = flags & DQUOT_SPACE_RESERVE, index;
 
-	/* First test before acquiring mutex - solves deadlocks when we
-         * re-enter the quota code and are already holding the mutex */
 	if (!dquot_active(inode)) {
 		inode_decr_space(inode, number, reserve);
 		return;
 	}
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		int wtype;
@@ -1789,7 +1776,7 @@
 		goto out_unlock;
 	mark_all_dquot_dirty(dquots);
 out_unlock:
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
 }
 EXPORT_SYMBOL(__dquot_free_space);
@@ -1802,13 +1789,12 @@
 	unsigned int cnt;
 	struct dquot_warn warn[MAXQUOTAS];
 	struct dquot * const *dquots = inode->i_dquot;
+	int index;
 
-	/* First test before acquiring mutex - solves deadlocks when we
-         * re-enter the quota code and are already holding the mutex */
 	if (!dquot_active(inode))
 		return;
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	index = srcu_read_lock(&dquot_srcu);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		int wtype;
@@ -1823,7 +1809,7 @@
 	}
 	spin_unlock(&dq_data_lock);
 	mark_all_dquot_dirty(dquots);
-	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
 }
 EXPORT_SYMBOL(dquot_free_inode);
@@ -1837,6 +1823,8 @@
  * This operation can block, but only after everything is updated
  * A transaction must be started when entering this function.
  *
+ * We are holding reference on transfer_from & transfer_to, no need to
+ * protect them by srcu_read_lock().
  */
 int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
 {
@@ -1849,8 +1837,6 @@
 	struct dquot_warn warn_from_inodes[MAXQUOTAS];
 	struct dquot_warn warn_from_space[MAXQUOTAS];
 
-	/* First test before acquiring mutex - solves deadlocks when we
-         * re-enter the quota code and are already holding the mutex */
 	if (IS_NOQUOTA(inode))
 		return 0;
 	/* Initialize the arrays */
@@ -1859,12 +1845,12 @@
 		warn_from_inodes[cnt].w_type = QUOTA_NL_NOWARN;
 		warn_from_space[cnt].w_type = QUOTA_NL_NOWARN;
 	}
-	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+
+	spin_lock(&dq_data_lock);
 	if (IS_NOQUOTA(inode)) {	/* File without quota accounting? */
-		up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+		spin_unlock(&dq_data_lock);
 		return 0;
 	}
-	spin_lock(&dq_data_lock);
 	cur_space = inode_get_bytes(inode);
 	rsv_space = inode_get_rsv_space(inode);
 	space = cur_space + rsv_space;
@@ -1918,7 +1904,6 @@
 		inode->i_dquot[cnt] = transfer_to[cnt];
 	}
 	spin_unlock(&dq_data_lock);
-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 
 	mark_all_dquot_dirty(transfer_from);
 	mark_all_dquot_dirty(transfer_to);
@@ -1932,7 +1917,6 @@
 	return 0;
 over_quota:
 	spin_unlock(&dq_data_lock);
-	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	flush_warnings(warn_to);
 	return ret;
 }
diff --git a/fs/quota/kqid.c b/fs/quota/kqid.c
index 2f97b0e..ebc5e62 100644
--- a/fs/quota/kqid.c
+++ b/fs/quota/kqid.c
@@ -55,7 +55,7 @@
 /**
  *	from_kqid - Create a qid from a kqid user-namespace pair.
  *	@targ: The user namespace we want a qid in.
- *	@kuid: The kernel internal quota identifier to start with.
+ *	@kqid: The kernel internal quota identifier to start with.
  *
  *	Map @kqid into the user-namespace specified by @targ and
  *	return the resulting qid.
diff --git a/fs/quota/netlink.c b/fs/quota/netlink.c
index 72d2917..bb2869f 100644
--- a/fs/quota/netlink.c
+++ b/fs/quota/netlink.c
@@ -32,8 +32,7 @@
 
 /**
  * quota_send_warning - Send warning to userspace about exceeded quota
- * @type: The quota type: USRQQUOTA, GRPQUOTA,...
- * @id: The user or group id of the quota that was exceeded
+ * @qid: The kernel internal quota identifier.
  * @dev: The device on which the fs is mounted (sb->s_dev)
  * @warntype: The type of the warning: QUOTA_NL_...
  *
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index ff3f0b3..7562164 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -79,13 +79,13 @@
 {
 	__u32 fmt;
 
-	down_read(&sb_dqopt(sb)->dqptr_sem);
+	mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
 	if (!sb_has_quota_active(sb, type)) {
-		up_read(&sb_dqopt(sb)->dqptr_sem);
+		mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 		return -ESRCH;
 	}
 	fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id;
-	up_read(&sb_dqopt(sb)->dqptr_sem);
+	mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
 	if (copy_to_user(addr, &fmt, sizeof(fmt)))
 		return -EFAULT;
 	return 0;
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c
index 5739cb9..9c02d96 100644
--- a/fs/reiserfs/do_balan.c
+++ b/fs/reiserfs/do_balan.c
@@ -286,12 +286,14 @@
 	return 0;
 }
 
-static void balance_leaf_insert_left(struct tree_balance *tb,
-				     struct item_head *ih, const char *body)
+static unsigned int balance_leaf_insert_left(struct tree_balance *tb,
+					     struct item_head *const ih,
+					     const char * const body)
 {
 	int ret;
 	struct buffer_info bi;
 	int n = B_NR_ITEMS(tb->L[0]);
+	unsigned body_shift_bytes = 0;
 
 	if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1) {
 		/* part of new item falls into L[0] */
@@ -329,7 +331,7 @@
 
 		put_ih_item_len(ih, new_item_len);
 		if (tb->lbytes > tb->zeroes_num) {
-			body += (tb->lbytes - tb->zeroes_num);
+			body_shift_bytes = tb->lbytes - tb->zeroes_num;
 			tb->zeroes_num = 0;
 		} else
 			tb->zeroes_num -= tb->lbytes;
@@ -349,11 +351,12 @@
 		tb->insert_size[0] = 0;
 		tb->zeroes_num = 0;
 	}
+	return body_shift_bytes;
 }
 
 static void balance_leaf_paste_left_shift_dirent(struct tree_balance *tb,
-						 struct item_head *ih,
-						 const char *body)
+						 struct item_head * const ih,
+						 const char * const body)
 {
 	int n = B_NR_ITEMS(tb->L[0]);
 	struct buffer_info bi;
@@ -413,17 +416,18 @@
 	tb->pos_in_item -= tb->lbytes;
 }
 
-static void balance_leaf_paste_left_shift(struct tree_balance *tb,
-					  struct item_head *ih,
-					  const char *body)
+static unsigned int balance_leaf_paste_left_shift(struct tree_balance *tb,
+						  struct item_head * const ih,
+						  const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n = B_NR_ITEMS(tb->L[0]);
 	struct buffer_info bi;
+	int body_shift_bytes = 0;
 
 	if (is_direntry_le_ih(item_head(tbS0, tb->item_pos))) {
 		balance_leaf_paste_left_shift_dirent(tb, ih, body);
-		return;
+		return 0;
 	}
 
 	RFALSE(tb->lbytes <= 0,
@@ -497,7 +501,7 @@
 		 * insert_size[0]
 		 */
 		if (l_n > tb->zeroes_num) {
-			body += (l_n - tb->zeroes_num);
+			body_shift_bytes = l_n - tb->zeroes_num;
 			tb->zeroes_num = 0;
 		} else
 			tb->zeroes_num -= l_n;
@@ -526,13 +530,14 @@
 		 */
 		leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
 	}
+	return body_shift_bytes;
 }
 
 
 /* appended item will be in L[0] in whole */
 static void balance_leaf_paste_left_whole(struct tree_balance *tb,
-					  struct item_head *ih,
-					  const char *body)
+					  struct item_head * const ih,
+					  const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n = B_NR_ITEMS(tb->L[0]);
@@ -584,39 +589,44 @@
 	tb->zeroes_num = 0;
 }
 
-static void balance_leaf_paste_left(struct tree_balance *tb,
-				    struct item_head *ih, const char *body)
+static unsigned int balance_leaf_paste_left(struct tree_balance *tb,
+					    struct item_head * const ih,
+					    const char * const body)
 {
 	/* we must shift the part of the appended item */
 	if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1)
-		balance_leaf_paste_left_shift(tb, ih, body);
+		return balance_leaf_paste_left_shift(tb, ih, body);
 	else
 		balance_leaf_paste_left_whole(tb, ih, body);
+	return 0;
 }
 
 /* Shift lnum[0] items from S[0] to the left neighbor L[0] */
-static void balance_leaf_left(struct tree_balance *tb, struct item_head *ih,
-			      const char *body, int flag)
+static unsigned int balance_leaf_left(struct tree_balance *tb,
+				      struct item_head * const ih,
+				      const char * const body, int flag)
 {
 	if (tb->lnum[0] <= 0)
-		return;
+		return 0;
 
 	/* new item or it part falls to L[0], shift it too */
 	if (tb->item_pos < tb->lnum[0]) {
 		BUG_ON(flag != M_INSERT && flag != M_PASTE);
 
 		if (flag == M_INSERT)
-			balance_leaf_insert_left(tb, ih, body);
+			return balance_leaf_insert_left(tb, ih, body);
 		else /* M_PASTE */
-			balance_leaf_paste_left(tb, ih, body);
+			return balance_leaf_paste_left(tb, ih, body);
 	} else
 		/* new item doesn't fall into L[0] */
 		leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
+	return 0;
 }
 
 
 static void balance_leaf_insert_right(struct tree_balance *tb,
-				      struct item_head *ih, const char *body)
+				      struct item_head * const ih,
+				      const char * const body)
 {
 
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
@@ -704,7 +714,8 @@
 
 
 static void balance_leaf_paste_right_shift_dirent(struct tree_balance *tb,
-				     struct item_head *ih, const char *body)
+				     struct item_head * const ih,
+				     const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	struct buffer_info bi;
@@ -754,7 +765,8 @@
 }
 
 static void balance_leaf_paste_right_shift(struct tree_balance *tb,
-				     struct item_head *ih, const char *body)
+				     struct item_head * const ih,
+				     const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n_shift, n_rem, r_zeroes_number, version;
@@ -831,7 +843,8 @@
 }
 
 static void balance_leaf_paste_right_whole(struct tree_balance *tb,
-				     struct item_head *ih, const char *body)
+				     struct item_head * const ih,
+				     const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n = B_NR_ITEMS(tbS0);
@@ -874,7 +887,8 @@
 }
 
 static void balance_leaf_paste_right(struct tree_balance *tb,
-				     struct item_head *ih, const char *body)
+				     struct item_head * const ih,
+				     const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n = B_NR_ITEMS(tbS0);
@@ -896,8 +910,9 @@
 }
 
 /* shift rnum[0] items from S[0] to the right neighbor R[0] */
-static void balance_leaf_right(struct tree_balance *tb, struct item_head *ih,
-			       const char *body, int flag)
+static void balance_leaf_right(struct tree_balance *tb,
+			       struct item_head * const ih,
+			       const char * const body, int flag)
 {
 	if (tb->rnum[0] <= 0)
 		return;
@@ -911,8 +926,8 @@
 }
 
 static void balance_leaf_new_nodes_insert(struct tree_balance *tb,
-					  struct item_head *ih,
-					  const char *body,
+					  struct item_head * const ih,
+					  const char * const body,
 					  struct item_head *insert_key,
 					  struct buffer_head **insert_ptr,
 					  int i)
@@ -1003,8 +1018,8 @@
 
 /* we append to directory item */
 static void balance_leaf_new_nodes_paste_dirent(struct tree_balance *tb,
-					 struct item_head *ih,
-					 const char *body,
+					 struct item_head * const ih,
+					 const char * const body,
 					 struct item_head *insert_key,
 					 struct buffer_head **insert_ptr,
 					 int i)
@@ -1058,8 +1073,8 @@
 }
 
 static void balance_leaf_new_nodes_paste_shift(struct tree_balance *tb,
-					 struct item_head *ih,
-					 const char *body,
+					 struct item_head * const ih,
+					 const char * const body,
 					 struct item_head *insert_key,
 					 struct buffer_head **insert_ptr,
 					 int i)
@@ -1131,8 +1146,8 @@
 }
 
 static void balance_leaf_new_nodes_paste_whole(struct tree_balance *tb,
-					       struct item_head *ih,
-					       const char *body,
+					       struct item_head * const ih,
+					       const char * const body,
 					       struct item_head *insert_key,
 					       struct buffer_head **insert_ptr,
 					       int i)
@@ -1184,8 +1199,8 @@
 
 }
 static void balance_leaf_new_nodes_paste(struct tree_balance *tb,
-					 struct item_head *ih,
-					 const char *body,
+					 struct item_head * const ih,
+					 const char * const body,
 					 struct item_head *insert_key,
 					 struct buffer_head **insert_ptr,
 					 int i)
@@ -1214,8 +1229,8 @@
 
 /* Fill new nodes that appear in place of S[0] */
 static void balance_leaf_new_nodes(struct tree_balance *tb,
-				   struct item_head *ih,
-				   const char *body,
+				   struct item_head * const ih,
+				   const char * const body,
 				   struct item_head *insert_key,
 				   struct buffer_head **insert_ptr,
 				   int flag)
@@ -1254,8 +1269,8 @@
 }
 
 static void balance_leaf_finish_node_insert(struct tree_balance *tb,
-					    struct item_head *ih,
-					    const char *body)
+					    struct item_head * const ih,
+					    const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	struct buffer_info bi;
@@ -1271,8 +1286,8 @@
 }
 
 static void balance_leaf_finish_node_paste_dirent(struct tree_balance *tb,
-						  struct item_head *ih,
-						  const char *body)
+						  struct item_head * const ih,
+						  const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	struct item_head *pasted = item_head(tbS0, tb->item_pos);
@@ -1305,8 +1320,8 @@
 }
 
 static void balance_leaf_finish_node_paste(struct tree_balance *tb,
-					   struct item_head *ih,
-					   const char *body)
+					   struct item_head * const ih,
+					   const char * const body)
 {
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	struct buffer_info bi;
@@ -1349,8 +1364,8 @@
  * of the affected item which remains in S
  */
 static void balance_leaf_finish_node(struct tree_balance *tb,
-				      struct item_head *ih,
-				      const char *body, int flag)
+				      struct item_head * const ih,
+				      const char * const body, int flag)
 {
 	/* if we must insert or append into buffer S[0] */
 	if (0 <= tb->item_pos && tb->item_pos < tb->s0num) {
@@ -1402,7 +1417,7 @@
 	    && is_indirect_le_ih(item_head(tbS0, tb->item_pos)))
 		tb->pos_in_item *= UNFM_P_SIZE;
 
-	balance_leaf_left(tb, ih, body, flag);
+	body += balance_leaf_left(tb, ih, body, flag);
 
 	/* tb->lnum[0] > 0 */
 	/* Calculate new item position */
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index e8870de..a88b1b3 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -1947,8 +1947,6 @@
 		}
 	}
 
-	/* wait for all commits to finish */
-	cancel_delayed_work(&SB_JOURNAL(sb)->j_work);
 
 	/*
 	 * We must release the write lock here because
@@ -1956,8 +1954,14 @@
 	 */
 	reiserfs_write_unlock(sb);
 
+	/*
+	 * Cancel flushing of old commits. Note that neither of these works
+	 * will be requeued because superblock is being shutdown and doesn't
+	 * have MS_ACTIVE set.
+	 */
 	cancel_delayed_work_sync(&REISERFS_SB(sb)->old_work);
-	flush_workqueue(REISERFS_SB(sb)->commit_wq);
+	/* wait for all commits to finish */
+	cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work);
 
 	free_journal_ram(sb);
 
@@ -4292,9 +4296,15 @@
 	if (flush) {
 		flush_commit_list(sb, jl, 1);
 		flush_journal_list(sb, jl, 1);
-	} else if (!(jl->j_state & LIST_COMMIT_PENDING))
-		queue_delayed_work(REISERFS_SB(sb)->commit_wq,
-				   &journal->j_work, HZ / 10);
+	} else if (!(jl->j_state & LIST_COMMIT_PENDING)) {
+		/*
+		 * Avoid queueing work when sb is being shut down. Transaction
+		 * will be flushed on journal shutdown.
+		 */
+		if (sb->s_flags & MS_ACTIVE)
+			queue_delayed_work(REISERFS_SB(sb)->commit_wq,
+					   &journal->j_work, HZ / 10);
+	}
 
 	/*
 	 * if the next transaction has any chance of wrapping, flush
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c
index 814dda3..249594a 100644
--- a/fs/reiserfs/lbalance.c
+++ b/fs/reiserfs/lbalance.c
@@ -899,8 +899,9 @@
 
 /* insert item into the leaf node in position before */
 void leaf_insert_into_buf(struct buffer_info *bi, int before,
-			  struct item_head *inserted_item_ih,
-			  const char *inserted_item_body, int zeros_number)
+			  struct item_head * const inserted_item_ih,
+			  const char * const inserted_item_body,
+			  int zeros_number)
 {
 	struct buffer_head *bh = bi->bi_bh;
 	int nr, free_space;
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index bf53888..735c2c2 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -3216,11 +3216,12 @@
 void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first,
 		       int del_num, int del_bytes);
 void leaf_insert_into_buf(struct buffer_info *bi, int before,
-			  struct item_head *inserted_item_ih,
-			  const char *inserted_item_body, int zeros_number);
-void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
-			  int pos_in_item, int paste_size, const char *body,
+			  struct item_head * const inserted_item_ih,
+			  const char * const inserted_item_body,
 			  int zeros_number);
+void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
+			  int pos_in_item, int paste_size,
+			  const char * const body, int zeros_number);
 void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
 			  int pos_in_item, int cut_size);
 void leaf_paste_entries(struct buffer_info *bi, int item_num, int before,
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 709ea92..d46e88a 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -100,7 +100,11 @@
 	struct reiserfs_sb_info *sbi = REISERFS_SB(s);
 	unsigned long delay;
 
-	if (s->s_flags & MS_RDONLY)
+	/*
+	 * Avoid scheduling flush when sb is being shut down. It can race
+	 * with journal shutdown and free still queued delayed work.
+	 */
+	if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
 		return;
 
 	spin_lock(&sbi->old_work_lock);
diff --git a/fs/super.c b/fs/super.c
index d20d5b1..b9a214d 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -22,7 +22,6 @@
 
 #include <linux/export.h>
 #include <linux/slab.h>
-#include <linux/acct.h>
 #include <linux/blkdev.h>
 #include <linux/mount.h>
 #include <linux/security.h>
@@ -218,7 +217,6 @@
 	lockdep_set_class(&s->s_vfs_rename_mutex, &type->s_vfs_rename_key);
 	mutex_init(&s->s_dquot.dqio_mutex);
 	mutex_init(&s->s_dquot.dqonoff_mutex);
-	init_rwsem(&s->s_dquot.dqptr_sem);
 	s->s_maxbytes = MAX_NON_LFS;
 	s->s_op = &default_op;
 	s->s_time_gran = 1000000000;
@@ -702,12 +700,22 @@
 		return -EACCES;
 #endif
 
-	if (flags & MS_RDONLY)
-		acct_auto_close(sb);
-	shrink_dcache_sb(sb);
-
 	remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY);
 
+	if (remount_ro) {
+		if (sb->s_pins.first) {
+			up_write(&sb->s_umount);
+			sb_pin_kill(sb);
+			down_write(&sb->s_umount);
+			if (!sb->s_root)
+				return 0;
+			if (sb->s_writers.frozen != SB_UNFROZEN)
+				return -EBUSY;
+			remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY);
+		}
+	}
+	shrink_dcache_sb(sb);
+
 	/* If we are remounting RDONLY and current sb is read/write,
 	   make sure there are no rw files opened */
 	if (remount_ro) {
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index ff82293..aa13ad0 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -174,7 +174,6 @@
 	if (err)
 		goto out;
 
-	mutex_lock(&c->mst_mutex);
 	c->mst_node->cmt_no      = cpu_to_le64(c->cmt_no);
 	c->mst_node->log_lnum    = cpu_to_le32(new_ltail_lnum);
 	c->mst_node->root_lnum   = cpu_to_le32(zroot.lnum);
@@ -204,7 +203,6 @@
 	else
 		c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_NO_ORPHS);
 	err = ubifs_write_master(c);
-	mutex_unlock(&c->mst_mutex);
 	if (err)
 		goto out;
 
diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index 2290d58..fb08b0c 100644
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -431,7 +431,7 @@
 
 /**
  * wbuf_timer_callback - write-buffer timer callback function.
- * @data: timer data (write-buffer descriptor)
+ * @timer: timer data (write-buffer descriptor)
  *
  * This function is called when the write-buffer timer expires.
  */
diff --git a/fs/ubifs/log.c b/fs/ubifs/log.c
index a902c59..a47ddfc 100644
--- a/fs/ubifs/log.c
+++ b/fs/ubifs/log.c
@@ -240,6 +240,7 @@
 
 	if (c->lhead_offs > c->leb_size - c->ref_node_alsz) {
 		c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
+		ubifs_assert(c->lhead_lnum != c->ltail_lnum);
 		c->lhead_offs = 0;
 	}
 
@@ -404,15 +405,14 @@
 	/* Switch to the next log LEB */
 	if (c->lhead_offs) {
 		c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
+		ubifs_assert(c->lhead_lnum != c->ltail_lnum);
 		c->lhead_offs = 0;
 	}
 
-	if (c->lhead_offs == 0) {
-		/* Must ensure next LEB has been unmapped */
-		err = ubifs_leb_unmap(c, c->lhead_lnum);
-		if (err)
-			goto out;
-	}
+	/* Must ensure next LEB has been unmapped */
+	err = ubifs_leb_unmap(c, c->lhead_lnum);
+	if (err)
+		goto out;
 
 	len = ALIGN(len, c->min_io_size);
 	dbg_log("writing commit start at LEB %d:0, len %d", c->lhead_lnum, len);
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index d46b19e..421bd0a 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1464,7 +1464,6 @@
 			return ERR_CAST(nnode);
 	}
 	iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
-	shft -= UBIFS_LPT_FANOUT_SHIFT;
 	pnode = ubifs_get_pnode(c, nnode, iip);
 	if (IS_ERR(pnode))
 		return ERR_CAST(pnode);
@@ -1604,7 +1603,6 @@
 			return ERR_CAST(nnode);
 	}
 	iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
-	shft -= UBIFS_LPT_FANOUT_SHIFT;
 	pnode = ubifs_get_pnode(c, nnode, iip);
 	if (IS_ERR(pnode))
 		return ERR_CAST(pnode);
@@ -1964,7 +1962,6 @@
 		}
 	}
 	iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
-	shft -= UBIFS_LPT_FANOUT_SHIFT;
 	pnode = scan_get_pnode(c, path + h, nnode, iip);
 	if (IS_ERR(pnode)) {
 		err = PTR_ERR(pnode);
@@ -2198,6 +2195,7 @@
 					  lprops->dirty);
 				return -EINVAL;
 			}
+			break;
 		case LPROPS_FREEABLE:
 		case LPROPS_FRDI_IDX:
 			if (lprops->free + lprops->dirty != c->leb_size) {
@@ -2206,6 +2204,7 @@
 					  lprops->dirty);
 				return -EINVAL;
 			}
+			break;
 		}
 	}
 	return 0;
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 45d4e96..d9c0292 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -304,7 +304,6 @@
 			ubifs_assert(lnum >= c->lpt_first &&
 				     lnum <= c->lpt_last);
 		}
-		done_ltab = 1;
 		c->ltab_lnum = lnum;
 		c->ltab_offs = offs;
 		offs += c->ltab_sz;
@@ -514,7 +513,6 @@
 			if (err)
 				return err;
 		}
-		done_ltab = 1;
 		ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
 		offs += c->ltab_sz;
 		dbg_chk_lpt_sz(c, 1, c->ltab_sz);
@@ -1941,6 +1939,11 @@
 				pr_err("LEB %d:%d, nnode, ",
 				       lnum, offs);
 			err = ubifs_unpack_nnode(c, p, &nnode);
+			if (err) {
+				pr_err("failed to unpack_node, error %d\n",
+				       err);
+				break;
+			}
 			for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
 				pr_cont("%d:%d", nnode.nbranch[i].lnum,
 				       nnode.nbranch[i].offs);
diff --git a/fs/ubifs/master.c b/fs/ubifs/master.c
index ab83ace..1a4bb9e 100644
--- a/fs/ubifs/master.c
+++ b/fs/ubifs/master.c
@@ -352,10 +352,9 @@
  * ubifs_write_master - write master node.
  * @c: UBIFS file-system description object
  *
- * This function writes the master node. The caller has to take the
- * @c->mst_mutex lock before calling this function. Returns zero in case of
- * success and a negative error code in case of failure. The master node is
- * written twice to enable recovery.
+ * This function writes the master node. Returns zero in case of success and a
+ * negative error code in case of failure. The master node is written twice to
+ * enable recovery.
  */
 int ubifs_write_master(struct ubifs_info *c)
 {
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index f1c3e5a1..4409f48 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -346,7 +346,6 @@
 		int lnum;
 
 		/* Unmap any unused LEBs after consolidation */
-		lnum = c->ohead_lnum + 1;
 		for (lnum = c->ohead_lnum + 1; lnum <= c->orph_last; lnum++) {
 			err = ubifs_leb_unmap(c, lnum);
 			if (err)
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index c14adb2..c640938 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -596,7 +596,6 @@
  * drop_last_node - drop the last node.
  * @sleb: scanned LEB information
  * @offs: offset of dropped nodes is returned here
- * @grouped: non-zero if whole group of nodes have to be dropped
  *
  * This is a helper function for 'ubifs_recover_leb()' which drops the last
  * node of the scanned LEB.
@@ -629,8 +628,8 @@
  *
  * This function does a scan of a LEB, but caters for errors that might have
  * been caused by the unclean unmount from which we are attempting to recover.
- * Returns %0 in case of success, %-EUCLEAN if an unrecoverable corruption is
- * found, and a negative error code in case of failure.
+ * Returns the scanned information on success and a negative error code on
+ * failure.
  */
 struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
 					 int offs, void *sbuf, int jhead)
diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
index 4c37607..79c6dbb 100644
--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -332,6 +332,8 @@
 	cs->ch.node_type = UBIFS_CS_NODE;
 	err = ubifs_write_node(c, cs, UBIFS_CS_NODE_SZ, UBIFS_LOG_LNUM, 0);
 	kfree(cs);
+	if (err)
+		return err;
 
 	ubifs_msg("default file-system created");
 	return 0;
@@ -447,7 +449,7 @@
 		goto failed;
 	}
 
-	if (c->default_compr < 0 || c->default_compr >= UBIFS_COMPR_TYPES_CNT) {
+	if (c->default_compr >= UBIFS_COMPR_TYPES_CNT) {
 		err = 13;
 		goto failed;
 	}
diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index 58aa05d..89adbc4 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -131,7 +131,8 @@
  * @offs: offset to start at (usually zero)
  * @sbuf: scan buffer (must be c->leb_size)
  *
- * This function returns %0 on success and a negative error code on failure.
+ * This function returns the scanned information on success and a negative error
+ * code on failure.
  */
 struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum,
 					int offs, void *sbuf)
@@ -157,9 +158,10 @@
 		return ERR_PTR(err);
 	}
 
-	if (err == -EBADMSG)
-		sleb->ecc = 1;
-
+	/*
+	 * Note, we ignore integrity errors (EBASMSG) because all the nodes are
+	 * protected by CRC checksums.
+	 */
 	return sleb;
 }
 
@@ -169,8 +171,6 @@
  * @sleb: scanning information
  * @lnum: logical eraseblock number
  * @offs: offset to start at (usually zero)
- *
- * This function returns %0 on success and a negative error code on failure.
  */
 void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 		    int lnum, int offs)
@@ -257,7 +257,7 @@
  * @quiet: print no messages
  *
  * This function scans LEB number @lnum and returns complete information about
- * its contents. Returns the scaned information in case of success and,
+ * its contents. Returns the scanned information in case of success and,
  * %-EUCLEAN if the LEB neads recovery, and other negative error codes in case
  * of failure.
  *
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 3904c85..106bf20 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -75,7 +75,7 @@
 		return 1;
 	}
 
-	if (ui->compr_type < 0 || ui->compr_type >= UBIFS_COMPR_TYPES_CNT) {
+	if (ui->compr_type >= UBIFS_COMPR_TYPES_CNT) {
 		ubifs_err("unknown compression type %d", ui->compr_type);
 		return 2;
 	}
@@ -424,19 +424,19 @@
 	struct ubifs_info *c = root->d_sb->s_fs_info;
 
 	if (c->mount_opts.unmount_mode == 2)
-		seq_printf(s, ",fast_unmount");
+		seq_puts(s, ",fast_unmount");
 	else if (c->mount_opts.unmount_mode == 1)
-		seq_printf(s, ",norm_unmount");
+		seq_puts(s, ",norm_unmount");
 
 	if (c->mount_opts.bulk_read == 2)
-		seq_printf(s, ",bulk_read");
+		seq_puts(s, ",bulk_read");
 	else if (c->mount_opts.bulk_read == 1)
-		seq_printf(s, ",no_bulk_read");
+		seq_puts(s, ",no_bulk_read");
 
 	if (c->mount_opts.chk_data_crc == 2)
-		seq_printf(s, ",chk_data_crc");
+		seq_puts(s, ",chk_data_crc");
 	else if (c->mount_opts.chk_data_crc == 1)
-		seq_printf(s, ",no_chk_data_crc");
+		seq_puts(s, ",no_chk_data_crc");
 
 	if (c->mount_opts.override_compr) {
 		seq_printf(s, ",compr=%s",
@@ -796,8 +796,8 @@
 {
 	int i, err;
 
-	c->jheads = kzalloc(c->jhead_cnt * sizeof(struct ubifs_jhead),
-			   GFP_KERNEL);
+	c->jheads = kcalloc(c->jhead_cnt, sizeof(struct ubifs_jhead),
+			    GFP_KERNEL);
 	if (!c->jheads)
 		return -ENOMEM;
 
@@ -1963,7 +1963,6 @@
 		mutex_init(&c->lp_mutex);
 		mutex_init(&c->tnc_mutex);
 		mutex_init(&c->log_mutex);
-		mutex_init(&c->mst_mutex);
 		mutex_init(&c->umount_mutex);
 		mutex_init(&c->bu_mutex);
 		mutex_init(&c->write_reserve_mutex);
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 8a40cf9..6793db0 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -3294,7 +3294,6 @@
 		goto out_unlock;
 
 	if (err) {
-		err = -EINVAL;
 		key = &from_key;
 		goto out_dump;
 	}
diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index 3600994..7a205e0 100644
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -389,7 +389,6 @@
 				ubifs_dump_lprops(c);
 			}
 			/* Try to commit anyway */
-			err = 0;
 			break;
 		}
 		p++;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index c1f71fe..c4fe900 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -314,7 +314,6 @@
  * @nodes_cnt: number of nodes scanned
  * @nodes: list of struct ubifs_scan_node
  * @endpt: end point (and therefore the start of empty space)
- * @ecc: read returned -EBADMSG
  * @buf: buffer containing entire LEB scanned
  */
 struct ubifs_scan_leb {
@@ -322,7 +321,6 @@
 	int nodes_cnt;
 	struct list_head nodes;
 	int endpt;
-	int ecc;
 	void *buf;
 };
 
@@ -1051,7 +1049,6 @@
  *
  * @mst_node: master node
  * @mst_offs: offset of valid master node
- * @mst_mutex: protects the master node area, @mst_node, and @mst_offs
  *
  * @max_bu_buf_len: maximum bulk-read buffer length
  * @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu
@@ -1292,7 +1289,6 @@
 
 	struct ubifs_mst_node *mst_node;
 	int mst_offs;
-	struct mutex mst_mutex;
 
 	int max_bu_buf_len;
 	struct mutex bu_mutex;
diff --git a/fs/udf/file.c b/fs/udf/file.c
index d80738f..86c6743 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -27,7 +27,7 @@
 
 #include "udfdecl.h"
 #include <linux/fs.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/kernel.h>
 #include <linux/string.h> /* memset */
 #include <linux/capability.h>
@@ -100,24 +100,6 @@
 	return 0;
 }
 
-static int udf_adinicb_write_end(struct file *file,
-			struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned copied,
-			struct page *page, void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
-	char *kaddr;
-	struct udf_inode_info *iinfo = UDF_I(inode);
-
-	kaddr = kmap_atomic(page);
-	memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
-		kaddr + offset, copied);
-	kunmap_atomic(kaddr);
-
-	return simple_write_end(file, mapping, pos, len, copied, page, fsdata);
-}
-
 static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb,
 				     struct iov_iter *iter,
 				     loff_t offset)
@@ -130,7 +112,7 @@
 	.readpage	= udf_adinicb_readpage,
 	.writepage	= udf_adinicb_writepage,
 	.write_begin	= udf_adinicb_write_begin,
-	.write_end	= udf_adinicb_write_end,
+	.write_end	= simple_write_end,
 	.direct_IO	= udf_adinicb_direct_IO,
 };
 
diff --git a/fs/udf/lowlevel.c b/fs/udf/lowlevel.c
index 6583fe9..6ad5a45 100644
--- a/fs/udf/lowlevel.c
+++ b/fs/udf/lowlevel.c
@@ -21,7 +21,7 @@
 
 #include <linux/blkdev.h>
 #include <linux/cdrom.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "udf_sb.h"
 
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 3286db0..813da94 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -63,7 +63,7 @@
 #include "udf_i.h"
 
 #include <linux/init.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #define VDS_POS_PRIMARY_VOL_DESC	0
 #define VDS_POS_UNALLOC_SPACE_DESC	1
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index d7c6dbe..6fb7945 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -20,7 +20,7 @@
  */
 
 #include "udfdecl.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/time.h>
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 44b815e..afd470e 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -412,7 +412,6 @@
 	int extIndex = 0, newExtIndex = 0, hasExt = 0;
 	unsigned short valueCRC;
 	uint8_t curr;
-	const uint8_t hexChar[] = "0123456789ABCDEF";
 
 	if (udfName[0] == '.' &&
 	    (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) {
@@ -477,10 +476,10 @@
 			newIndex = 250;
 		newName[newIndex++] = CRC_MARK;
 		valueCRC = crc_itu_t(0, fidName, fidNameLen);
-		newName[newIndex++] = hexChar[(valueCRC & 0xf000) >> 12];
-		newName[newIndex++] = hexChar[(valueCRC & 0x0f00) >> 8];
-		newName[newIndex++] = hexChar[(valueCRC & 0x00f0) >> 4];
-		newName[newIndex++] = hexChar[(valueCRC & 0x000f)];
+		newName[newIndex++] = hex_asc_upper_hi(valueCRC >> 8);
+		newName[newIndex++] = hex_asc_upper_lo(valueCRC >> 8);
+		newName[newIndex++] = hex_asc_upper_hi(valueCRC);
+		newName[newIndex++] = hex_asc_upper_lo(valueCRC);
 
 		if (hasExt) {
 			newName[newIndex++] = EXT_MARK;
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index 399e8ce..5d47b4d 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -1,6 +1,7 @@
 config XFS_FS
 	tristate "XFS filesystem support"
 	depends on BLOCK
+	depends on (64BIT || LBDAF)
 	select EXPORTFS
 	select LIBCRC32C
 	help
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index c21f435..d617999 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -17,6 +17,7 @@
 #
 
 ccflags-y += -I$(src)			# needed for trace events
+ccflags-y += -I$(src)/libxfs
 
 ccflags-$(CONFIG_XFS_DEBUG) += -g
 
@@ -25,6 +26,39 @@
 # this one should be compiled first, as the tracing macros can easily blow up
 xfs-y				+= xfs_trace.o
 
+# build the libxfs code first
+xfs-y				+= $(addprefix libxfs/, \
+				   xfs_alloc.o \
+				   xfs_alloc_btree.o \
+				   xfs_attr.o \
+				   xfs_attr_leaf.o \
+				   xfs_attr_remote.o \
+				   xfs_bmap.o \
+				   xfs_bmap_btree.o \
+				   xfs_btree.o \
+				   xfs_da_btree.o \
+				   xfs_da_format.o \
+				   xfs_dir2.o \
+				   xfs_dir2_block.o \
+				   xfs_dir2_data.o \
+				   xfs_dir2_leaf.o \
+				   xfs_dir2_node.o \
+				   xfs_dir2_sf.o \
+				   xfs_dquot_buf.o \
+				   xfs_ialloc.o \
+				   xfs_ialloc_btree.o \
+				   xfs_inode_fork.o \
+				   xfs_inode_buf.o \
+				   xfs_log_rlimit.o \
+				   xfs_sb.o \
+				   xfs_symlink_remote.o \
+				   xfs_trans_resv.o \
+				   )
+# xfs_rtbitmap is shared with libxfs
+xfs-$(CONFIG_XFS_RT)		+= $(addprefix libxfs/, \
+				   xfs_rtbitmap.o \
+				   )
+
 # highlevel code
 xfs-y				+= xfs_aops.o \
 				   xfs_attr_inactive.o \
@@ -45,53 +79,27 @@
 				   xfs_ioctl.o \
 				   xfs_iomap.o \
 				   xfs_iops.o \
+				   xfs_inode.o \
 				   xfs_itable.o \
 				   xfs_message.o \
 				   xfs_mount.o \
 				   xfs_mru_cache.o \
 				   xfs_super.o \
 				   xfs_symlink.o \
+				   xfs_sysfs.o \
 				   xfs_trans.o \
 				   xfs_xattr.o \
 				   kmem.o \
 				   uuid.o
 
-# code shared with libxfs
-xfs-y				+= xfs_alloc.o \
-				   xfs_alloc_btree.o \
-				   xfs_attr.o \
-				   xfs_attr_leaf.o \
-				   xfs_attr_remote.o \
-				   xfs_bmap.o \
-				   xfs_bmap_btree.o \
-				   xfs_btree.o \
-				   xfs_da_btree.o \
-				   xfs_da_format.o \
-				   xfs_dir2.o \
-				   xfs_dir2_block.o \
-				   xfs_dir2_data.o \
-				   xfs_dir2_leaf.o \
-				   xfs_dir2_node.o \
-				   xfs_dir2_sf.o \
-				   xfs_dquot_buf.o \
-				   xfs_ialloc.o \
-				   xfs_ialloc_btree.o \
-				   xfs_icreate_item.o \
-				   xfs_inode.o \
-				   xfs_inode_fork.o \
-				   xfs_inode_buf.o \
-				   xfs_log_recover.o \
-				   xfs_log_rlimit.o \
-				   xfs_sb.o \
-				   xfs_symlink_remote.o \
-				   xfs_trans_resv.o
-
 # low-level transaction/log code
 xfs-y				+= xfs_log.o \
 				   xfs_log_cil.o \
 				   xfs_buf_item.o \
 				   xfs_extfree_item.o \
+				   xfs_icreate_item.o \
 				   xfs_inode_item.o \
+				   xfs_log_recover.o \
 				   xfs_trans_ail.o \
 				   xfs_trans_buf.o \
 				   xfs_trans_extfree.o \
@@ -107,8 +115,7 @@
 				   xfs_quotaops.o
 
 # xfs_rtbitmap is shared with libxfs
-xfs-$(CONFIG_XFS_RT)		+= xfs_rtalloc.o \
-				   xfs_rtbitmap.o
+xfs-$(CONFIG_XFS_RT)		+= xfs_rtalloc.o
 
 xfs-$(CONFIG_XFS_POSIX_ACL)	+= xfs_acl.o
 xfs-$(CONFIG_PROC_FS)		+= xfs_stats.o
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h
similarity index 100%
rename from fs/xfs/xfs_ag.h
rename to fs/xfs/libxfs/xfs_ag.h
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
similarity index 99%
rename from fs/xfs/xfs_alloc.c
rename to fs/xfs/libxfs/xfs_alloc.c
index d438132..4bffffe 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -483,9 +483,9 @@
 		return;
 
 	if (!xfs_buf_verify_cksum(bp, XFS_AGFL_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_agfl_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -503,7 +503,7 @@
 		return;
 
 	if (!xfs_agfl_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -559,7 +559,7 @@
 	xfs_trans_agblocks_delta(tp, len);
 	if (unlikely(be32_to_cpu(agf->agf_freeblks) >
 		     be32_to_cpu(agf->agf_length)))
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 
 	xfs_alloc_log_agf(tp, agbp, XFS_AGF_FREEBLKS);
 	return 0;
@@ -2234,11 +2234,11 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	    !xfs_buf_verify_cksum(bp, XFS_AGF_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (XFS_TEST_ERROR(!xfs_agf_verify(mp, bp), mp,
 				XFS_ERRTAG_ALLOC_READ_AGF,
 				XFS_RANDOM_ALLOC_READ_AGF))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -2252,7 +2252,7 @@
 	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
 	if (!xfs_agf_verify(mp, bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -2601,11 +2601,11 @@
 	 */
 	args.agno = XFS_FSB_TO_AGNO(args.mp, bno);
 	if (args.agno >= args.mp->m_sb.sb_agcount)
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 
 	args.agbno = XFS_FSB_TO_AGBNO(args.mp, bno);
 	if (args.agbno >= args.mp->m_sb.sb_agblocks)
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 
 	args.pag = xfs_perag_get(args.mp, args.agno);
 	ASSERT(args.pag);
@@ -2617,7 +2617,7 @@
 	/* validate the extent size is legal now we have the agf locked */
 	if (args.agbno + len >
 			be32_to_cpu(XFS_BUF_TO_AGF(args.agbp)->agf_length)) {
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto error0;
 	}
 
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h
similarity index 100%
rename from fs/xfs/xfs_alloc.h
rename to fs/xfs/libxfs/xfs_alloc.h
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
similarity index 98%
rename from fs/xfs/xfs_alloc_btree.c
rename to fs/xfs/libxfs/xfs_alloc_btree.c
index 8358f1d..e0e83e2 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -355,9 +355,9 @@
 	struct xfs_buf	*bp)
 {
 	if (!xfs_btree_sblock_verify_crc(bp))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_allocbt_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
@@ -371,7 +371,7 @@
 {
 	if (!xfs_allocbt_verify(bp)) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/libxfs/xfs_alloc_btree.h
similarity index 100%
rename from fs/xfs/xfs_alloc_btree.h
rename to fs/xfs/libxfs/xfs_alloc_btree.h
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
similarity index 96%
rename from fs/xfs/xfs_attr.c
rename to fs/xfs/libxfs/xfs_attr.c
index bfe36fc..353fb42 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -85,7 +85,7 @@
 {
 
 	if (!name)
-		return EINVAL;
+		return -EINVAL;
 
 	memset(args, 0, sizeof(*args));
 	args->geo = dp->i_mount->m_attr_geo;
@@ -95,7 +95,7 @@
 	args->name = name;
 	args->namelen = strlen((const char *)name);
 	if (args->namelen >= MAXNAMELEN)
-		return EFAULT;		/* match IRIX behaviour */
+		return -EFAULT;		/* match IRIX behaviour */
 
 	args->hashval = xfs_da_hashname(args->name, args->namelen);
 	return 0;
@@ -131,10 +131,10 @@
 	XFS_STATS_INC(xs_attr_get);
 
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
-		return EIO;
+		return -EIO;
 
 	if (!xfs_inode_hasattr(ip))
-		return ENOATTR;
+		return -ENOATTR;
 
 	error = xfs_attr_args_init(&args, ip, name, flags);
 	if (error)
@@ -145,7 +145,7 @@
 
 	lock_mode = xfs_ilock_attr_map_shared(ip);
 	if (!xfs_inode_hasattr(ip))
-		error = ENOATTR;
+		error = -ENOATTR;
 	else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL)
 		error = xfs_attr_shortform_getvalue(&args);
 	else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK))
@@ -155,7 +155,7 @@
 	xfs_iunlock(ip, lock_mode);
 
 	*valuelenp = args.valuelen;
-	return error == EEXIST ? 0 : error;
+	return error == -EEXIST ? 0 : error;
 }
 
 /*
@@ -213,7 +213,7 @@
 	XFS_STATS_INC(xs_attr_set);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return EIO;
+		return -EIO;
 
 	error = xfs_attr_args_init(&args, dp, name, flags);
 	if (error)
@@ -304,7 +304,7 @@
 		 * the inode.
 		 */
 		error = xfs_attr_shortform_addname(&args);
-		if (error != ENOSPC) {
+		if (error != -ENOSPC) {
 			/*
 			 * Commit the shortform mods, and we're done.
 			 * NOTE: this is also the error path (EEXIST, etc).
@@ -419,10 +419,10 @@
 	XFS_STATS_INC(xs_attr_remove);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return EIO;
+		return -EIO;
 
 	if (!xfs_inode_hasattr(dp))
-		return ENOATTR;
+		return -ENOATTR;
 
 	error = xfs_attr_args_init(&args, dp, name, flags);
 	if (error)
@@ -477,7 +477,7 @@
 	xfs_trans_ijoin(args.trans, dp, 0);
 
 	if (!xfs_inode_hasattr(dp)) {
-		error = XFS_ERROR(ENOATTR);
+		error = -ENOATTR;
 	} else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
 		ASSERT(dp->i_afp->if_flags & XFS_IFINLINE);
 		error = xfs_attr_shortform_remove(&args);
@@ -534,28 +534,28 @@
 	trace_xfs_attr_sf_addname(args);
 
 	retval = xfs_attr_shortform_lookup(args);
-	if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
-		return(retval);
-	} else if (retval == EEXIST) {
+	if ((args->flags & ATTR_REPLACE) && (retval == -ENOATTR)) {
+		return retval;
+	} else if (retval == -EEXIST) {
 		if (args->flags & ATTR_CREATE)
-			return(retval);
+			return retval;
 		retval = xfs_attr_shortform_remove(args);
 		ASSERT(retval == 0);
 	}
 
 	if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX ||
 	    args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX)
-		return(XFS_ERROR(ENOSPC));
+		return -ENOSPC;
 
 	newsize = XFS_ATTR_SF_TOTSIZE(args->dp);
 	newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
 
 	forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize);
 	if (!forkoff)
-		return(XFS_ERROR(ENOSPC));
+		return -ENOSPC;
 
 	xfs_attr_shortform_add(args, forkoff);
-	return(0);
+	return 0;
 }
 
 
@@ -592,10 +592,10 @@
 	 * the given flags produce an error or call for an atomic rename.
 	 */
 	retval = xfs_attr3_leaf_lookup_int(bp, args);
-	if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
+	if ((args->flags & ATTR_REPLACE) && (retval == -ENOATTR)) {
 		xfs_trans_brelse(args->trans, bp);
 		return retval;
-	} else if (retval == EEXIST) {
+	} else if (retval == -EEXIST) {
 		if (args->flags & ATTR_CREATE) {	/* pure create op */
 			xfs_trans_brelse(args->trans, bp);
 			return retval;
@@ -626,7 +626,7 @@
 	 * if required.
 	 */
 	retval = xfs_attr3_leaf_add(bp, args);
-	if (retval == ENOSPC) {
+	if (retval == -ENOSPC) {
 		/*
 		 * Promote the attribute list to the Btree format, then
 		 * Commit that transaction so that the node_addname() call
@@ -642,7 +642,7 @@
 			ASSERT(committed);
 			args->trans = NULL;
 			xfs_bmap_cancel(args->flist);
-			return(error);
+			return error;
 		}
 
 		/*
@@ -658,13 +658,13 @@
 		 */
 		error = xfs_trans_roll(&args->trans, dp);
 		if (error)
-			return (error);
+			return error;
 
 		/*
 		 * Fob the whole rest of the problem off on the Btree code.
 		 */
 		error = xfs_attr_node_addname(args);
-		return(error);
+		return error;
 	}
 
 	/*
@@ -673,7 +673,7 @@
 	 */
 	error = xfs_trans_roll(&args->trans, dp);
 	if (error)
-		return (error);
+		return error;
 
 	/*
 	 * If there was an out-of-line value, allocate the blocks we
@@ -684,7 +684,7 @@
 	if (args->rmtblkno > 0) {
 		error = xfs_attr_rmtval_set(args);
 		if (error)
-			return(error);
+			return error;
 	}
 
 	/*
@@ -700,7 +700,7 @@
 		 */
 		error = xfs_attr3_leaf_flipflags(args);
 		if (error)
-			return(error);
+			return error;
 
 		/*
 		 * Dismantle the "old" attribute/value pair by removing
@@ -714,7 +714,7 @@
 		if (args->rmtblkno) {
 			error = xfs_attr_rmtval_remove(args);
 			if (error)
-				return(error);
+				return error;
 		}
 
 		/*
@@ -744,7 +744,7 @@
 				ASSERT(committed);
 				args->trans = NULL;
 				xfs_bmap_cancel(args->flist);
-				return(error);
+				return error;
 			}
 
 			/*
@@ -795,7 +795,7 @@
 		return error;
 
 	error = xfs_attr3_leaf_lookup_int(bp, args);
-	if (error == ENOATTR) {
+	if (error == -ENOATTR) {
 		xfs_trans_brelse(args->trans, bp);
 		return error;
 	}
@@ -850,7 +850,7 @@
 		return error;
 
 	error = xfs_attr3_leaf_lookup_int(bp, args);
-	if (error != EEXIST)  {
+	if (error != -EEXIST)  {
 		xfs_trans_brelse(args->trans, bp);
 		return error;
 	}
@@ -906,9 +906,9 @@
 		goto out;
 	blk = &state->path.blk[ state->path.active-1 ];
 	ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
-	if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
+	if ((args->flags & ATTR_REPLACE) && (retval == -ENOATTR)) {
 		goto out;
-	} else if (retval == EEXIST) {
+	} else if (retval == -EEXIST) {
 		if (args->flags & ATTR_CREATE)
 			goto out;
 
@@ -933,7 +933,7 @@
 	}
 
 	retval = xfs_attr3_leaf_add(blk->bp, state->args);
-	if (retval == ENOSPC) {
+	if (retval == -ENOSPC) {
 		if (state->path.active == 1) {
 			/*
 			 * Its really a single leaf node, but it had
@@ -1031,7 +1031,7 @@
 	if (args->rmtblkno > 0) {
 		error = xfs_attr_rmtval_set(args);
 		if (error)
-			return(error);
+			return error;
 	}
 
 	/*
@@ -1061,7 +1061,7 @@
 		if (args->rmtblkno) {
 			error = xfs_attr_rmtval_remove(args);
 			if (error)
-				return(error);
+				return error;
 		}
 
 		/*
@@ -1134,8 +1134,8 @@
 	if (state)
 		xfs_da_state_free(state);
 	if (error)
-		return(error);
-	return(retval);
+		return error;
+	return retval;
 }
 
 /*
@@ -1168,7 +1168,7 @@
 	 * Search to see if name exists, and get back a pointer to it.
 	 */
 	error = xfs_da3_node_lookup_int(state, &retval);
-	if (error || (retval != EEXIST)) {
+	if (error || (retval != -EEXIST)) {
 		if (error == 0)
 			error = retval;
 		goto out;
@@ -1297,7 +1297,7 @@
 
 out:
 	xfs_da_state_free(state);
-	return(error);
+	return error;
 }
 
 /*
@@ -1345,7 +1345,7 @@
 		}
 	}
 
-	return(0);
+	return 0;
 }
 
 /*
@@ -1376,7 +1376,7 @@
 						blk->blkno, blk->disk_blkno,
 						&blk->bp, XFS_ATTR_FORK);
 			if (error)
-				return(error);
+				return error;
 		} else {
 			blk->bp = NULL;
 		}
@@ -1395,13 +1395,13 @@
 						blk->blkno, blk->disk_blkno,
 						&blk->bp, XFS_ATTR_FORK);
 			if (error)
-				return(error);
+				return error;
 		} else {
 			blk->bp = NULL;
 		}
 	}
 
-	return(0);
+	return 0;
 }
 
 /*
@@ -1431,7 +1431,7 @@
 	error = xfs_da3_node_lookup_int(state, &retval);
 	if (error) {
 		retval = error;
-	} else if (retval == EEXIST) {
+	} else if (retval == -EEXIST) {
 		blk = &state->path.blk[ state->path.active-1 ];
 		ASSERT(blk->bp != NULL);
 		ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
@@ -1455,5 +1455,5 @@
 	}
 
 	xfs_da_state_free(state);
-	return(retval);
+	return retval;
 }
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
similarity index 98%
rename from fs/xfs/xfs_attr_leaf.c
rename to fs/xfs/libxfs/xfs_attr_leaf.c
index 28712d2..b1f73db 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -214,7 +214,7 @@
 	struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_attr3_leaf_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -242,9 +242,9 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	     !xfs_buf_verify_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_attr3_leaf_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -547,7 +547,7 @@
 		break;
 	}
 	if (i == end)
-		return(XFS_ERROR(ENOATTR));
+		return -ENOATTR;
 
 	/*
 	 * Fix up the attribute fork data, covering the hole
@@ -582,7 +582,7 @@
 
 	xfs_sbversion_add_attr2(mp, args->trans);
 
-	return(0);
+	return 0;
 }
 
 /*
@@ -611,9 +611,9 @@
 			continue;
 		if (!xfs_attr_namesp_match(args->flags, sfe->flags))
 			continue;
-		return(XFS_ERROR(EEXIST));
+		return -EEXIST;
 	}
-	return(XFS_ERROR(ENOATTR));
+	return -ENOATTR;
 }
 
 /*
@@ -640,18 +640,18 @@
 			continue;
 		if (args->flags & ATTR_KERNOVAL) {
 			args->valuelen = sfe->valuelen;
-			return(XFS_ERROR(EEXIST));
+			return -EEXIST;
 		}
 		if (args->valuelen < sfe->valuelen) {
 			args->valuelen = sfe->valuelen;
-			return(XFS_ERROR(ERANGE));
+			return -ERANGE;
 		}
 		args->valuelen = sfe->valuelen;
 		memcpy(args->value, &sfe->nameval[args->namelen],
 						    args->valuelen);
-		return(XFS_ERROR(EEXIST));
+		return -EEXIST;
 	}
-	return(XFS_ERROR(ENOATTR));
+	return -ENOATTR;
 }
 
 /*
@@ -691,7 +691,7 @@
 		 * If we hit an IO error middle of the transaction inside
 		 * grow_inode(), we may have inconsistent data. Bail out.
 		 */
-		if (error == EIO)
+		if (error == -EIO)
 			goto out;
 		xfs_idata_realloc(dp, size, XFS_ATTR_FORK);	/* try to put */
 		memcpy(ifp->if_u1.if_data, tmpbuffer, size);	/* it back */
@@ -730,9 +730,9 @@
 						sfe->namelen);
 		nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags);
 		error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */
-		ASSERT(error == ENOATTR);
+		ASSERT(error == -ENOATTR);
 		error = xfs_attr3_leaf_add(bp, &nargs);
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		if (error)
 			goto out;
 		sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
@@ -741,7 +741,7 @@
 
 out:
 	kmem_free(tmpbuffer);
-	return(error);
+	return error;
 }
 
 /*
@@ -769,12 +769,12 @@
 		if (entry->flags & XFS_ATTR_INCOMPLETE)
 			continue;		/* don't copy partial entries */
 		if (!(entry->flags & XFS_ATTR_LOCAL))
-			return(0);
+			return 0;
 		name_loc = xfs_attr3_leaf_name_local(leaf, i);
 		if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX)
-			return(0);
+			return 0;
 		if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX)
-			return(0);
+			return 0;
 		bytes += sizeof(struct xfs_attr_sf_entry) - 1
 				+ name_loc->namelen
 				+ be16_to_cpu(name_loc->valuelen);
@@ -809,7 +809,7 @@
 
 	tmpbuffer = kmem_alloc(args->geo->blksize, KM_SLEEP);
 	if (!tmpbuffer)
-		return ENOMEM;
+		return -ENOMEM;
 
 	memcpy(tmpbuffer, bp->b_addr, args->geo->blksize);
 
@@ -1017,10 +1017,10 @@
 	ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC);
 	error = xfs_da_grow_inode(state->args, &blkno);
 	if (error)
-		return(error);
+		return error;
 	error = xfs_attr3_leaf_create(state->args, blkno, &newblk->bp);
 	if (error)
-		return(error);
+		return error;
 	newblk->blkno = blkno;
 	newblk->magic = XFS_ATTR_LEAF_MAGIC;
 
@@ -1031,7 +1031,7 @@
 	xfs_attr3_leaf_rebalance(state, oldblk, newblk);
 	error = xfs_da3_blk_link(state, oldblk, newblk);
 	if (error)
-		return(error);
+		return error;
 
 	/*
 	 * Save info on "old" attribute for "atomic rename" ops, leaf_add()
@@ -1053,7 +1053,7 @@
 	 */
 	oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL);
 	newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL);
-	return(error);
+	return error;
 }
 
 /*
@@ -1108,7 +1108,7 @@
 	 * no good and we should just give up.
 	 */
 	if (!ichdr.holes && sum < entsize)
-		return XFS_ERROR(ENOSPC);
+		return -ENOSPC;
 
 	/*
 	 * Compact the entries to coalesce free space.
@@ -1121,7 +1121,7 @@
 	 * free region, in freemap[0].  If it is not big enough, give up.
 	 */
 	if (ichdr.freemap[0].size < (entsize + sizeof(xfs_attr_leaf_entry_t))) {
-		tmp = ENOSPC;
+		tmp = -ENOSPC;
 		goto out_log_hdr;
 	}
 
@@ -1692,7 +1692,7 @@
 		ichdr.usedbytes;
 	if (bytes > (state->args->geo->blksize >> 1)) {
 		*action = 0;	/* blk over 50%, don't try to join */
-		return(0);
+		return 0;
 	}
 
 	/*
@@ -1711,7 +1711,7 @@
 		error = xfs_da3_path_shift(state, &state->altpath, forward,
 						 0, &retval);
 		if (error)
-			return(error);
+			return error;
 		if (retval) {
 			*action = 0;
 		} else {
@@ -1740,7 +1740,7 @@
 		error = xfs_attr3_leaf_read(state->args->trans, state->args->dp,
 					blkno, -1, &bp);
 		if (error)
-			return(error);
+			return error;
 
 		xfs_attr3_leaf_hdr_from_disk(&ichdr2, bp->b_addr);
 
@@ -1757,7 +1757,7 @@
 	}
 	if (i >= 2) {
 		*action = 0;
-		return(0);
+		return 0;
 	}
 
 	/*
@@ -1773,13 +1773,13 @@
 						 0, &retval);
 	}
 	if (error)
-		return(error);
+		return error;
 	if (retval) {
 		*action = 0;
 	} else {
 		*action = 1;
 	}
-	return(0);
+	return 0;
 }
 
 /*
@@ -2123,7 +2123,7 @@
 	}
 	if (probe == ichdr.count || be32_to_cpu(entry->hashval) != hashval) {
 		args->index = probe;
-		return XFS_ERROR(ENOATTR);
+		return -ENOATTR;
 	}
 
 	/*
@@ -2152,7 +2152,7 @@
 			if (!xfs_attr_namesp_match(args->flags, entry->flags))
 				continue;
 			args->index = probe;
-			return XFS_ERROR(EEXIST);
+			return -EEXIST;
 		} else {
 			name_rmt = xfs_attr3_leaf_name_remote(leaf, probe);
 			if (name_rmt->namelen != args->namelen)
@@ -2168,11 +2168,11 @@
 			args->rmtblkcnt = xfs_attr3_rmt_blocks(
 							args->dp->i_mount,
 							args->rmtvaluelen);
-			return XFS_ERROR(EEXIST);
+			return -EEXIST;
 		}
 	}
 	args->index = probe;
-	return XFS_ERROR(ENOATTR);
+	return -ENOATTR;
 }
 
 /*
@@ -2208,7 +2208,7 @@
 		}
 		if (args->valuelen < valuelen) {
 			args->valuelen = valuelen;
-			return XFS_ERROR(ERANGE);
+			return -ERANGE;
 		}
 		args->valuelen = valuelen;
 		memcpy(args->value, &name_loc->nameval[args->namelen], valuelen);
@@ -2226,7 +2226,7 @@
 		}
 		if (args->valuelen < args->rmtvaluelen) {
 			args->valuelen = args->rmtvaluelen;
-			return XFS_ERROR(ERANGE);
+			return -ERANGE;
 		}
 		args->valuelen = args->rmtvaluelen;
 	}
@@ -2481,7 +2481,7 @@
 	 */
 	error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
 	if (error)
-		return(error);
+		return error;
 
 	leaf = bp->b_addr;
 	entry = &xfs_attr3_leaf_entryp(leaf)[args->index];
@@ -2548,7 +2548,7 @@
 	 */
 	error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
 	if (error)
-		return(error);
+		return error;
 
 	leaf = bp->b_addr;
 #ifdef DEBUG
diff --git a/fs/xfs/xfs_attr_leaf.h b/fs/xfs/libxfs/xfs_attr_leaf.h
similarity index 100%
rename from fs/xfs/xfs_attr_leaf.h
rename to fs/xfs/libxfs/xfs_attr_leaf.h
diff --git a/fs/xfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
similarity index 97%
rename from fs/xfs/xfs_attr_remote.c
rename to fs/xfs/libxfs/xfs_attr_remote.c
index b5adfec..7510ab8 100644
--- a/fs/xfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -138,11 +138,11 @@
 
 	while (len > 0) {
 		if (!xfs_verify_cksum(ptr, blksize, XFS_ATTR3_RMT_CRC_OFF)) {
-			xfs_buf_ioerror(bp, EFSBADCRC);
+			xfs_buf_ioerror(bp, -EFSBADCRC);
 			break;
 		}
 		if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) {
-			xfs_buf_ioerror(bp, EFSCORRUPTED);
+			xfs_buf_ioerror(bp, -EFSCORRUPTED);
 			break;
 		}
 		len -= blksize;
@@ -178,7 +178,7 @@
 
 	while (len > 0) {
 		if (!xfs_attr3_rmt_verify(mp, ptr, blksize, bno)) {
-			xfs_buf_ioerror(bp, EFSCORRUPTED);
+			xfs_buf_ioerror(bp, -EFSCORRUPTED);
 			xfs_verifier_error(bp);
 			return;
 		}
@@ -257,7 +257,7 @@
 				xfs_alert(mp,
 "remote attribute header mismatch bno/off/len/owner (0x%llx/0x%x/Ox%x/0x%llx)",
 					bno, *offset, byte_cnt, ino);
-				return EFSCORRUPTED;
+				return -EFSCORRUPTED;
 			}
 			hdr_size = sizeof(struct xfs_attr3_rmt_hdr);
 		}
@@ -452,7 +452,7 @@
 			ASSERT(committed);
 			args->trans = NULL;
 			xfs_bmap_cancel(args->flist);
-			return(error);
+			return error;
 		}
 
 		/*
@@ -473,7 +473,7 @@
 		 */
 		error = xfs_trans_roll(&args->trans, dp);
 		if (error)
-			return (error);
+			return error;
 	}
 
 	/*
@@ -498,7 +498,7 @@
 				       blkcnt, &map, &nmap,
 				       XFS_BMAPI_ATTRFORK);
 		if (error)
-			return(error);
+			return error;
 		ASSERT(nmap == 1);
 		ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
 		       (map.br_startblock != HOLESTARTBLOCK));
@@ -508,7 +508,7 @@
 
 		bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0);
 		if (!bp)
-			return ENOMEM;
+			return -ENOMEM;
 		bp->b_ops = &xfs_attr3_rmt_buf_ops;
 
 		xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset,
@@ -563,7 +563,7 @@
 		error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno,
 				       blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK);
 		if (error)
-			return(error);
+			return error;
 		ASSERT(nmap == 1);
 		ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
 		       (map.br_startblock != HOLESTARTBLOCK));
@@ -622,7 +622,7 @@
 		 */
 		error = xfs_trans_roll(&args->trans, args->dp);
 		if (error)
-			return (error);
+			return error;
 	}
-	return(0);
+	return 0;
 }
diff --git a/fs/xfs/xfs_attr_remote.h b/fs/xfs/libxfs/xfs_attr_remote.h
similarity index 100%
rename from fs/xfs/xfs_attr_remote.h
rename to fs/xfs/libxfs/xfs_attr_remote.h
diff --git a/fs/xfs/xfs_attr_sf.h b/fs/xfs/libxfs/xfs_attr_sf.h
similarity index 100%
rename from fs/xfs/xfs_attr_sf.h
rename to fs/xfs/libxfs/xfs_attr_sf.h
diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/libxfs/xfs_bit.h
similarity index 100%
rename from fs/xfs/xfs_bit.h
rename to fs/xfs/libxfs/xfs_bit.h
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
similarity index 99%
rename from fs/xfs/xfs_bmap.c
rename to fs/xfs/libxfs/xfs_bmap.c
index 75c3fe5..de2d26d 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -392,7 +392,7 @@
 	pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
 	bno = be64_to_cpu(*pp);
 
-	ASSERT(bno != NULLDFSBNO);
+	ASSERT(bno != NULLFSBLOCK);
 	ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
 	ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
 
@@ -1033,7 +1033,7 @@
 			goto error0;
 		if (stat == 0) {
 			xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		}
 		*firstblock = cur->bc_private.b.firstblock;
 		cur->bc_private.b.allocated = 0;
@@ -1115,7 +1115,7 @@
 
 	/* should only be called for types that support local format data */
 	ASSERT(0);
-	return EFSCORRUPTED;
+	return -EFSCORRUPTED;
 }
 
 /*
@@ -1192,7 +1192,7 @@
 		break;
 	default:
 		ASSERT(0);
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto trans_cancel;
 	}
 
@@ -1299,7 +1299,7 @@
 	ASSERT(level > 0);
 	pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
 	bno = be64_to_cpu(*pp);
-	ASSERT(bno != NULLDFSBNO);
+	ASSERT(bno != NULLFSBLOCK);
 	ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
 	ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
 	/*
@@ -1399,7 +1399,7 @@
 	return 0;
 error0:
 	xfs_trans_brelse(tp, bp);
-	return XFS_ERROR(EFSCORRUPTED);
+	return -EFSCORRUPTED;
 }
 
 
@@ -1429,11 +1429,7 @@
 	gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
 	gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
 	gotp->br_state = XFS_EXT_INVALID;
-#if XFS_BIG_BLKNOS
 	gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
-#else
-	gotp->br_startblock = 0xffffa5a5;
-#endif
 	prevp->br_startoff = NULLFILEOFF;
 
 	ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
@@ -1576,7 +1572,7 @@
 	if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
 	    XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
 	    XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
-	       return XFS_ERROR(EIO);
+	       return -EIO;
 	if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
 		*last_block = 0;
 		return 0;
@@ -1690,7 +1686,7 @@
 
 	if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
 	    XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
-	       return XFS_ERROR(EIO);
+	       return -EIO;
 
 	error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty);
 	if (error || is_empty)
@@ -3323,7 +3319,7 @@
 		if (orig_off < align_off ||
 		    orig_end > align_off + align_alen ||
 		    align_alen - temp < orig_alen)
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		/*
 		 * Try to fix it by moving the start up.
 		 */
@@ -3348,7 +3344,7 @@
 		 * Result doesn't cover the request, fail it.
 		 */
 		if (orig_off < align_off || orig_end > align_off + align_alen)
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 	} else {
 		ASSERT(orig_off >= align_off);
 		ASSERT(orig_end <= align_off + align_alen);
@@ -4051,11 +4047,11 @@
 	     XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
 	     mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
 		XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	XFS_STATS_INC(xs_blk_mapr);
 
@@ -4246,11 +4242,11 @@
 	     XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE),
 	     mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
 		XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	XFS_STATS_INC(xs_blk_mapw);
 
@@ -4469,7 +4465,7 @@
 	 * so generate another request.
 	 */
 	if (mval->br_blockcount < len)
-		return EAGAIN;
+		return -EAGAIN;
 	return 0;
 }
 
@@ -4540,11 +4536,11 @@
 	     XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
 	     mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
 		XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 
@@ -4620,7 +4616,7 @@
 
 		/* Execute unwritten extent conversion if necessary */
 		error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags);
-		if (error == EAGAIN)
+		if (error == -EAGAIN)
 			continue;
 		if (error)
 			goto error0;
@@ -4922,7 +4918,7 @@
 					goto done;
 				cur->bc_rec.b = new;
 				error = xfs_btree_insert(cur, &i);
-				if (error && error != ENOSPC)
+				if (error && error != -ENOSPC)
 					goto done;
 				/*
 				 * If get no-space back from btree insert,
@@ -4930,7 +4926,7 @@
 				 * block reservation.
 				 * Fix up our state and return the error.
 				 */
-				if (error == ENOSPC) {
+				if (error == -ENOSPC) {
 					/*
 					 * Reset the cursor, don't trust
 					 * it after any insert operation.
@@ -4958,7 +4954,7 @@
 					xfs_bmbt_set_blockcount(ep,
 						got.br_blockcount);
 					flags = 0;
-					error = XFS_ERROR(ENOSPC);
+					error = -ENOSPC;
 					goto done;
 				}
 				XFS_WANT_CORRUPTED_GOTO(i == 1, done);
@@ -5076,11 +5072,11 @@
 	    XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
 		XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
 				 ip->i_mount);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	mp = ip->i_mount;
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 	ASSERT(len > 0);
@@ -5325,7 +5321,7 @@
 		    del.br_startoff > got.br_startoff &&
 		    del.br_startoff + del.br_blockcount <
 		    got.br_startoff + got.br_blockcount) {
-			error = XFS_ERROR(ENOSPC);
+			error = -ENOSPC;
 			goto error0;
 		}
 		error = xfs_bmap_del_extent(ip, tp, &lastx, flist, cur, &del,
@@ -5449,11 +5445,11 @@
 	     mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
 		XFS_ERROR_REPORT("xfs_bmap_shift_extents",
 				 XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	ASSERT(current_ext != NULL);
 
@@ -5516,14 +5512,14 @@
 						*current_ext - 1), &left);
 
 			if (startoff < left.br_startoff + left.br_blockcount)
-				error = XFS_ERROR(EINVAL);
+				error = -EINVAL;
 		} else if (offset_shift_fsb > got.br_startoff) {
 			/*
 			 * When first extent is shifted, offset_shift_fsb
 			 * should be less than the stating offset of
 			 * the first extent.
 			 */
-			error = XFS_ERROR(EINVAL);
+			error = -EINVAL;
 		}
 
 		if (error)
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
similarity index 100%
rename from fs/xfs/xfs_bmap.h
rename to fs/xfs/libxfs/xfs_bmap.h
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c
similarity index 88%
rename from fs/xfs/xfs_bmap_btree.c
rename to fs/xfs/libxfs/xfs_bmap_btree.c
index 948836c..fba7533 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/libxfs/xfs_bmap_btree.c
@@ -111,23 +111,8 @@
 	ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
 	s->br_startoff = ((xfs_fileoff_t)l0 &
 			   xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
-#if XFS_BIG_BLKNOS
 	s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) |
 			   (((xfs_fsblock_t)l1) >> 21);
-#else
-#ifdef DEBUG
-	{
-		xfs_dfsbno_t	b;
-
-		b = (((xfs_dfsbno_t)l0 & xfs_mask64lo(9)) << 43) |
-		    (((xfs_dfsbno_t)l1) >> 21);
-		ASSERT((b >> 32) == 0 || isnulldstartblock(b));
-		s->br_startblock = (xfs_fsblock_t)b;
-	}
-#else	/* !DEBUG */
-	s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
-#endif	/* DEBUG */
-#endif	/* XFS_BIG_BLKNOS */
 	s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21));
 	/* This is xfs_extent_state() in-line */
 	if (ext_flag) {
@@ -163,21 +148,8 @@
 xfs_bmbt_get_startblock(
 	xfs_bmbt_rec_host_t	*r)
 {
-#if XFS_BIG_BLKNOS
 	return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) |
 	       (((xfs_fsblock_t)r->l1) >> 21);
-#else
-#ifdef DEBUG
-	xfs_dfsbno_t	b;
-
-	b = (((xfs_dfsbno_t)r->l0 & xfs_mask64lo(9)) << 43) |
-	    (((xfs_dfsbno_t)r->l1) >> 21);
-	ASSERT((b >> 32) == 0 || isnulldstartblock(b));
-	return (xfs_fsblock_t)b;
-#else	/* !DEBUG */
-	return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
-#endif	/* DEBUG */
-#endif	/* XFS_BIG_BLKNOS */
 }
 
 /*
@@ -241,7 +213,6 @@
 	ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
 	ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
 
-#if XFS_BIG_BLKNOS
 	ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
 
 	r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
@@ -250,23 +221,6 @@
 	r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
 		((xfs_bmbt_rec_base_t)blockcount &
 		(xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-#else	/* !XFS_BIG_BLKNOS */
-	if (isnullstartblock(startblock)) {
-		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			((xfs_bmbt_rec_base_t)startoff << 9) |
-			 (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
-		r->l1 = xfs_mask64hi(11) |
-			  ((xfs_bmbt_rec_base_t)startblock << 21) |
-			  ((xfs_bmbt_rec_base_t)blockcount &
-			   (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-	} else {
-		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			((xfs_bmbt_rec_base_t)startoff << 9);
-		r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
-			 ((xfs_bmbt_rec_base_t)blockcount &
-			 (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-	}
-#endif	/* XFS_BIG_BLKNOS */
 }
 
 /*
@@ -298,8 +252,6 @@
 	ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
 	ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
 	ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
-
-#if XFS_BIG_BLKNOS
 	ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
 
 	r->l0 = cpu_to_be64(
@@ -310,26 +262,6 @@
 		((xfs_bmbt_rec_base_t)startblock << 21) |
 		 ((xfs_bmbt_rec_base_t)blockcount &
 		  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-#else	/* !XFS_BIG_BLKNOS */
-	if (isnullstartblock(startblock)) {
-		r->l0 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			 ((xfs_bmbt_rec_base_t)startoff << 9) |
-			  (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
-		r->l1 = cpu_to_be64(xfs_mask64hi(11) |
-			  ((xfs_bmbt_rec_base_t)startblock << 21) |
-			  ((xfs_bmbt_rec_base_t)blockcount &
-			   (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-	} else {
-		r->l0 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			 ((xfs_bmbt_rec_base_t)startoff << 9));
-		r->l1 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)startblock << 21) |
-			 ((xfs_bmbt_rec_base_t)blockcount &
-			  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-	}
-#endif	/* XFS_BIG_BLKNOS */
 }
 
 /*
@@ -365,24 +297,11 @@
 	xfs_bmbt_rec_host_t *r,
 	xfs_fsblock_t	v)
 {
-#if XFS_BIG_BLKNOS
 	ASSERT((v & xfs_mask64hi(12)) == 0);
 	r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) |
 		  (xfs_bmbt_rec_base_t)(v >> 43);
 	r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) |
 		  (xfs_bmbt_rec_base_t)(v << 21);
-#else	/* !XFS_BIG_BLKNOS */
-	if (isnullstartblock(v)) {
-		r->l0 |= (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
-		r->l1 = (xfs_bmbt_rec_base_t)xfs_mask64hi(11) |
-			  ((xfs_bmbt_rec_base_t)v << 21) |
-			  (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-	} else {
-		r->l0 &= ~(xfs_bmbt_rec_base_t)xfs_mask64lo(9);
-		r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
-			  (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-	}
-#endif	/* XFS_BIG_BLKNOS */
 }
 
 /*
@@ -438,8 +357,8 @@
 		       cpu_to_be64(XFS_BUF_DADDR_NULL));
 	} else
 		ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC));
-	ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO));
-	ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO));
+	ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK));
+	ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK));
 	ASSERT(rblock->bb_level != 0);
 	dblock->bb_level = rblock->bb_level;
 	dblock->bb_numrecs = rblock->bb_numrecs;
@@ -554,7 +473,7 @@
 	args.minlen = args.maxlen = args.prod = 1;
 	args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
 	if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
-		error = XFS_ERROR(ENOSPC);
+		error = -ENOSPC;
 		goto error0;
 	}
 	error = xfs_alloc_vextent(&args);
@@ -763,11 +682,11 @@
 
 	/* sibling pointer verification */
 	if (!block->bb_u.l.bb_leftsib ||
-	    (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLDFSBNO) &&
+	    (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLFSBLOCK) &&
 	     !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib))))
 		return false;
 	if (!block->bb_u.l.bb_rightsib ||
-	    (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLDFSBNO) &&
+	    (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLFSBLOCK) &&
 	     !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib))))
 		return false;
 
@@ -779,9 +698,9 @@
 	struct xfs_buf	*bp)
 {
 	if (!xfs_btree_lblock_verify_crc(bp))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_bmbt_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
@@ -795,7 +714,7 @@
 {
 	if (!xfs_bmbt_verify(bp)) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -959,7 +878,7 @@
 
 	cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork);
 	if (!cur)
-		return ENOMEM;
+		return -ENOMEM;
 
 	error = xfs_btree_change_owner(cur, new_owner, buffer_list);
 	xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/libxfs/xfs_bmap_btree.h
similarity index 100%
rename from fs/xfs/xfs_bmap_btree.h
rename to fs/xfs/libxfs/xfs_bmap_btree.h
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
similarity index 98%
rename from fs/xfs/xfs_btree.c
rename to fs/xfs/libxfs/xfs_btree.c
index cf893bc..8fe6a93 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -78,11 +78,11 @@
 		be16_to_cpu(block->bb_numrecs) <=
 			cur->bc_ops->get_maxrecs(cur, level) &&
 		block->bb_u.l.bb_leftsib &&
-		(block->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO) ||
+		(block->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK) ||
 		 XFS_FSB_SANITY_CHECK(mp,
 			be64_to_cpu(block->bb_u.l.bb_leftsib))) &&
 		block->bb_u.l.bb_rightsib &&
-		(block->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO) ||
+		(block->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK) ||
 		 XFS_FSB_SANITY_CHECK(mp,
 			be64_to_cpu(block->bb_u.l.bb_rightsib)));
 
@@ -92,7 +92,7 @@
 		if (bp)
 			trace_xfs_btree_corrupt(bp, _RET_IP_);
 		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -140,7 +140,7 @@
 		if (bp)
 			trace_xfs_btree_corrupt(bp, _RET_IP_);
 		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -167,12 +167,12 @@
 int					/* error (0 or EFSCORRUPTED) */
 xfs_btree_check_lptr(
 	struct xfs_btree_cur	*cur,	/* btree cursor */
-	xfs_dfsbno_t		bno,	/* btree block disk address */
+	xfs_fsblock_t		bno,	/* btree block disk address */
 	int			level)	/* btree block level */
 {
 	XFS_WANT_CORRUPTED_RETURN(
 		level > 0 &&
-		bno != NULLDFSBNO &&
+		bno != NULLFSBLOCK &&
 		XFS_FSB_SANITY_CHECK(cur->bc_mp, bno));
 	return 0;
 }
@@ -595,7 +595,7 @@
 	block = xfs_btree_get_block(cur, level, &bp);
 	xfs_btree_check_block(cur, block, level, bp);
 	if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
-		return block->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO);
+		return block->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK);
 	else
 		return block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK);
 }
@@ -771,16 +771,16 @@
 	struct xfs_btree_block	*block)
 {
 	int			rval = 0;
-	xfs_dfsbno_t		left = be64_to_cpu(block->bb_u.l.bb_leftsib);
-	xfs_dfsbno_t		right = be64_to_cpu(block->bb_u.l.bb_rightsib);
+	xfs_fsblock_t		left = be64_to_cpu(block->bb_u.l.bb_leftsib);
+	xfs_fsblock_t		right = be64_to_cpu(block->bb_u.l.bb_rightsib);
 
-	if ((lr & XFS_BTCUR_LEFTRA) && left != NULLDFSBNO) {
+	if ((lr & XFS_BTCUR_LEFTRA) && left != NULLFSBLOCK) {
 		xfs_btree_reada_bufl(cur->bc_mp, left, 1,
 				     cur->bc_ops->buf_ops);
 		rval++;
 	}
 
-	if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLDFSBNO) {
+	if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLFSBLOCK) {
 		xfs_btree_reada_bufl(cur->bc_mp, right, 1,
 				     cur->bc_ops->buf_ops);
 		rval++;
@@ -852,7 +852,7 @@
 	union xfs_btree_ptr	*ptr)
 {
 	if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
-		ASSERT(ptr->l != cpu_to_be64(NULLDFSBNO));
+		ASSERT(ptr->l != cpu_to_be64(NULLFSBLOCK));
 
 		return XFS_FSB_TO_DADDR(cur->bc_mp, be64_to_cpu(ptr->l));
 	} else {
@@ -900,9 +900,9 @@
 
 	b = XFS_BUF_TO_BLOCK(bp);
 	if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
-		if (b->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO))
+		if (b->bb_u.l.bb_leftsib == cpu_to_be64(NULLFSBLOCK))
 			cur->bc_ra[lev] |= XFS_BTCUR_LEFTRA;
-		if (b->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO))
+		if (b->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK))
 			cur->bc_ra[lev] |= XFS_BTCUR_RIGHTRA;
 	} else {
 		if (b->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK))
@@ -918,7 +918,7 @@
 	union xfs_btree_ptr	*ptr)
 {
 	if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
-		return ptr->l == cpu_to_be64(NULLDFSBNO);
+		return ptr->l == cpu_to_be64(NULLFSBLOCK);
 	else
 		return ptr->s == cpu_to_be32(NULLAGBLOCK);
 }
@@ -929,7 +929,7 @@
 	union xfs_btree_ptr	*ptr)
 {
 	if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
-		ptr->l = cpu_to_be64(NULLDFSBNO);
+		ptr->l = cpu_to_be64(NULLFSBLOCK);
 	else
 		ptr->s = cpu_to_be32(NULLAGBLOCK);
 }
@@ -997,8 +997,8 @@
 	buf->bb_numrecs = cpu_to_be16(numrecs);
 
 	if (flags & XFS_BTREE_LONG_PTRS) {
-		buf->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
-		buf->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
+		buf->bb_u.l.bb_leftsib = cpu_to_be64(NULLFSBLOCK);
+		buf->bb_u.l.bb_rightsib = cpu_to_be64(NULLFSBLOCK);
 		if (flags & XFS_BTREE_CRC_BLOCKS) {
 			buf->bb_u.l.bb_blkno = cpu_to_be64(blkno);
 			buf->bb_u.l.bb_owner = cpu_to_be64(owner);
@@ -1140,7 +1140,7 @@
 				 mp->m_bsize, flags);
 
 	if (!*bpp)
-		return ENOMEM;
+		return -ENOMEM;
 
 	(*bpp)->b_ops = cur->bc_ops->buf_ops;
 	*block = XFS_BUF_TO_BLOCK(*bpp);
@@ -1498,7 +1498,7 @@
 		if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
 			goto out0;
 		ASSERT(0);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto error0;
 	}
 	ASSERT(lev < cur->bc_nlevels);
@@ -1597,7 +1597,7 @@
 		if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
 			goto out0;
 		ASSERT(0);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto error0;
 	}
 	ASSERT(lev < cur->bc_nlevels);
@@ -4018,7 +4018,7 @@
 	/* now read rh sibling block for next iteration */
 	xfs_btree_get_sibling(cur, block, &rptr, XFS_BB_RIGHTSIB);
 	if (xfs_btree_ptr_is_null(cur, &rptr))
-		return ENOENT;
+		return -ENOENT;
 
 	return xfs_btree_lookup_get_block(cur, level, &rptr, &block);
 }
@@ -4061,7 +4061,7 @@
 							     buffer_list);
 		} while (!error);
 
-		if (error != ENOENT)
+		if (error != -ENOENT)
 			return error;
 	}
 
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
similarity index 99%
rename from fs/xfs/xfs_btree.h
rename to fs/xfs/libxfs/xfs_btree.h
index a04b694..8f18bab 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -258,7 +258,7 @@
 int					/* error (0 or EFSCORRUPTED) */
 xfs_btree_check_lptr(
 	struct xfs_btree_cur	*cur,	/* btree cursor */
-	xfs_dfsbno_t		ptr,	/* btree block disk address */
+	xfs_fsblock_t		ptr,	/* btree block disk address */
 	int			level);	/* btree block level */
 
 /*
diff --git a/fs/xfs/xfs_cksum.h b/fs/xfs/libxfs/xfs_cksum.h
similarity index 100%
rename from fs/xfs/xfs_cksum.h
rename to fs/xfs/libxfs/xfs_cksum.h
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
similarity index 97%
rename from fs/xfs/xfs_da_btree.c
rename to fs/xfs/libxfs/xfs_da_btree.c
index a514ab6..2c42ae2 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -185,7 +185,7 @@
 	struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_da3_node_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -214,13 +214,13 @@
 	switch (be16_to_cpu(info->magic)) {
 		case XFS_DA3_NODE_MAGIC:
 			if (!xfs_buf_verify_cksum(bp, XFS_DA3_NODE_CRC_OFF)) {
-				xfs_buf_ioerror(bp, EFSBADCRC);
+				xfs_buf_ioerror(bp, -EFSBADCRC);
 				break;
 			}
 			/* fall through */
 		case XFS_DA_NODE_MAGIC:
 			if (!xfs_da3_node_verify(bp)) {
-				xfs_buf_ioerror(bp, EFSCORRUPTED);
+				xfs_buf_ioerror(bp, -EFSCORRUPTED);
 				break;
 			}
 			return;
@@ -315,7 +315,7 @@
 
 	error = xfs_da_get_buf(tp, dp, blkno, -1, &bp, whichfork);
 	if (error)
-		return(error);
+		return error;
 	bp->b_ops = &xfs_da3_node_buf_ops;
 	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF);
 	node = bp->b_addr;
@@ -337,7 +337,7 @@
 		XFS_DA_LOGRANGE(node, &node->hdr, dp->d_ops->node_hdr_size));
 
 	*bpp = bp;
-	return(0);
+	return 0;
 }
 
 /*
@@ -385,8 +385,8 @@
 		switch (oldblk->magic) {
 		case XFS_ATTR_LEAF_MAGIC:
 			error = xfs_attr3_leaf_split(state, oldblk, newblk);
-			if ((error != 0) && (error != ENOSPC)) {
-				return(error);	/* GROT: attr is inconsistent */
+			if ((error != 0) && (error != -ENOSPC)) {
+				return error;	/* GROT: attr is inconsistent */
 			}
 			if (!error) {
 				addblk = newblk;
@@ -408,7 +408,7 @@
 							    &state->extrablk);
 			}
 			if (error)
-				return(error);	/* GROT: attr inconsistent */
+				return error;	/* GROT: attr inconsistent */
 			addblk = newblk;
 			break;
 		case XFS_DIR2_LEAFN_MAGIC:
@@ -422,7 +422,7 @@
 							 max - i, &action);
 			addblk->bp = NULL;
 			if (error)
-				return(error);	/* GROT: dir is inconsistent */
+				return error;	/* GROT: dir is inconsistent */
 			/*
 			 * Record the newly split block for the next time thru?
 			 */
@@ -439,7 +439,7 @@
 		xfs_da3_fixhashpath(state, &state->path);
 	}
 	if (!addblk)
-		return(0);
+		return 0;
 
 	/*
 	 * Split the root node.
@@ -449,7 +449,7 @@
 	error = xfs_da3_root_split(state, oldblk, addblk);
 	if (error) {
 		addblk->bp = NULL;
-		return(error);	/* GROT: dir is inconsistent */
+		return error;	/* GROT: dir is inconsistent */
 	}
 
 	/*
@@ -492,7 +492,7 @@
 		    sizeof(node->hdr.info)));
 	}
 	addblk->bp = NULL;
-	return(0);
+	return 0;
 }
 
 /*
@@ -670,18 +670,18 @@
 		 */
 		error = xfs_da_grow_inode(state->args, &blkno);
 		if (error)
-			return(error);	/* GROT: dir is inconsistent */
+			return error;	/* GROT: dir is inconsistent */
 
 		error = xfs_da3_node_create(state->args, blkno, treelevel,
 					   &newblk->bp, state->args->whichfork);
 		if (error)
-			return(error);	/* GROT: dir is inconsistent */
+			return error;	/* GROT: dir is inconsistent */
 		newblk->blkno = blkno;
 		newblk->magic = XFS_DA_NODE_MAGIC;
 		xfs_da3_node_rebalance(state, oldblk, newblk);
 		error = xfs_da3_blk_link(state, oldblk, newblk);
 		if (error)
-			return(error);
+			return error;
 		*result = 1;
 	} else {
 		*result = 0;
@@ -721,7 +721,7 @@
 		}
 	}
 
-	return(0);
+	return 0;
 }
 
 /*
@@ -963,9 +963,9 @@
 		case XFS_ATTR_LEAF_MAGIC:
 			error = xfs_attr3_leaf_toosmall(state, &action);
 			if (error)
-				return(error);
+				return error;
 			if (action == 0)
-				return(0);
+				return 0;
 			xfs_attr3_leaf_unbalance(state, drop_blk, save_blk);
 			break;
 		case XFS_DIR2_LEAFN_MAGIC:
@@ -985,7 +985,7 @@
 			xfs_da3_fixhashpath(state, &state->path);
 			error = xfs_da3_node_toosmall(state, &action);
 			if (error)
-				return(error);
+				return error;
 			if (action == 0)
 				return 0;
 			xfs_da3_node_unbalance(state, drop_blk, save_blk);
@@ -995,12 +995,12 @@
 		error = xfs_da3_blk_unlink(state, drop_blk, save_blk);
 		xfs_da_state_kill_altpath(state);
 		if (error)
-			return(error);
+			return error;
 		error = xfs_da_shrink_inode(state->args, drop_blk->blkno,
 							 drop_blk->bp);
 		drop_blk->bp = NULL;
 		if (error)
-			return(error);
+			return error;
 	}
 	/*
 	 * We joined all the way to the top.  If it turns out that
@@ -1010,7 +1010,7 @@
 	xfs_da3_node_remove(state, drop_blk);
 	xfs_da3_fixhashpath(state, &state->path);
 	error = xfs_da3_root_join(state, &state->path.blk[0]);
-	return(error);
+	return error;
 }
 
 #ifdef	DEBUG
@@ -1099,7 +1099,7 @@
 	xfs_trans_log_buf(args->trans, root_blk->bp, 0,
 			  args->geo->blksize - 1);
 	error = xfs_da_shrink_inode(args, child, bp);
-	return(error);
+	return error;
 }
 
 /*
@@ -1142,7 +1142,7 @@
 	dp->d_ops->node_hdr_from_disk(&nodehdr, node);
 	if (nodehdr.count > (state->args->geo->node_ents >> 1)) {
 		*action = 0;	/* blk over 50%, don't try to join */
-		return(0);	/* blk over 50%, don't try to join */
+		return 0;	/* blk over 50%, don't try to join */
 	}
 
 	/*
@@ -1161,13 +1161,13 @@
 		error = xfs_da3_path_shift(state, &state->altpath, forward,
 						 0, &retval);
 		if (error)
-			return(error);
+			return error;
 		if (retval) {
 			*action = 0;
 		} else {
 			*action = 2;
 		}
-		return(0);
+		return 0;
 	}
 
 	/*
@@ -1194,7 +1194,7 @@
 		error = xfs_da3_node_read(state->args->trans, dp,
 					blkno, -1, &bp, state->args->whichfork);
 		if (error)
-			return(error);
+			return error;
 
 		node = bp->b_addr;
 		dp->d_ops->node_hdr_from_disk(&thdr, node);
@@ -1486,7 +1486,7 @@
 		if (error) {
 			blk->blkno = 0;
 			state->path.active--;
-			return(error);
+			return error;
 		}
 		curr = blk->bp->b_addr;
 		blk->magic = be16_to_cpu(curr->magic);
@@ -1579,25 +1579,25 @@
 			args->blkno = blk->blkno;
 		} else {
 			ASSERT(0);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
-		if (((retval == ENOENT) || (retval == ENOATTR)) &&
+		if (((retval == -ENOENT) || (retval == -ENOATTR)) &&
 		    (blk->hashval == args->hashval)) {
 			error = xfs_da3_path_shift(state, &state->path, 1, 1,
 							 &retval);
 			if (error)
-				return(error);
+				return error;
 			if (retval == 0) {
 				continue;
 			} else if (blk->magic == XFS_ATTR_LEAF_MAGIC) {
 				/* path_shift() gives ENOENT */
-				retval = XFS_ERROR(ENOATTR);
+				retval = -ENOATTR;
 			}
 		}
 		break;
 	}
 	*result = retval;
-	return(0);
+	return 0;
 }
 
 /*========================================================================
@@ -1692,7 +1692,7 @@
 						be32_to_cpu(old_info->back),
 						-1, &bp, args->whichfork);
 			if (error)
-				return(error);
+				return error;
 			ASSERT(bp != NULL);
 			tmp_info = bp->b_addr;
 			ASSERT(tmp_info->magic == old_info->magic);
@@ -1713,7 +1713,7 @@
 						be32_to_cpu(old_info->forw),
 						-1, &bp, args->whichfork);
 			if (error)
-				return(error);
+				return error;
 			ASSERT(bp != NULL);
 			tmp_info = bp->b_addr;
 			ASSERT(tmp_info->magic == old_info->magic);
@@ -1726,7 +1726,7 @@
 
 	xfs_trans_log_buf(args->trans, old_blk->bp, 0, sizeof(*tmp_info) - 1);
 	xfs_trans_log_buf(args->trans, new_blk->bp, 0, sizeof(*tmp_info) - 1);
-	return(0);
+	return 0;
 }
 
 /*
@@ -1772,7 +1772,7 @@
 						be32_to_cpu(drop_info->back),
 						-1, &bp, args->whichfork);
 			if (error)
-				return(error);
+				return error;
 			ASSERT(bp != NULL);
 			tmp_info = bp->b_addr;
 			ASSERT(tmp_info->magic == save_info->magic);
@@ -1789,7 +1789,7 @@
 						be32_to_cpu(drop_info->forw),
 						-1, &bp, args->whichfork);
 			if (error)
-				return(error);
+				return error;
 			ASSERT(bp != NULL);
 			tmp_info = bp->b_addr;
 			ASSERT(tmp_info->magic == save_info->magic);
@@ -1801,7 +1801,7 @@
 	}
 
 	xfs_trans_log_buf(args->trans, save_blk->bp, 0, sizeof(*save_info) - 1);
-	return(0);
+	return 0;
 }
 
 /*
@@ -1859,9 +1859,9 @@
 		}
 	}
 	if (level < 0) {
-		*result = XFS_ERROR(ENOENT);	/* we're out of our tree */
+		*result = -ENOENT;	/* we're out of our tree */
 		ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
-		return(0);
+		return 0;
 	}
 
 	/*
@@ -1883,7 +1883,7 @@
 		error = xfs_da3_node_read(args->trans, dp, blkno, -1,
 					&blk->bp, args->whichfork);
 		if (error)
-			return(error);
+			return error;
 		info = blk->bp->b_addr;
 		ASSERT(info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC) ||
 		       info->magic == cpu_to_be16(XFS_DA3_NODE_MAGIC) ||
@@ -2004,7 +2004,7 @@
 	struct xfs_trans	*tp = args->trans;
 	struct xfs_inode	*dp = args->dp;
 	int			w = args->whichfork;
-	xfs_drfsbno_t		nblks = dp->i_d.di_nblocks;
+	xfs_rfsblock_t		nblks = dp->i_d.di_nblocks;
 	struct xfs_bmbt_irec	map, *mapp;
 	int			nmap, error, got, i, mapi;
 
@@ -2068,7 +2068,7 @@
 	if (got != count || mapp[0].br_startoff != *bno ||
 	    mapp[mapi - 1].br_startoff + mapp[mapi - 1].br_blockcount !=
 	    *bno + count) {
-		error = XFS_ERROR(ENOSPC);
+		error = -ENOSPC;
 		goto out_free_map;
 	}
 
@@ -2158,7 +2158,7 @@
 	if (unlikely(lastoff == 0)) {
 		XFS_ERROR_REPORT("xfs_da_swap_lastblock(1)", XFS_ERRLEVEL_LOW,
 				 mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	/*
 	 * Read the last block in the btree space.
@@ -2209,7 +2209,7 @@
 		    sib_info->magic != dead_info->magic)) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(2)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		sib_info->forw = cpu_to_be32(dead_blkno);
@@ -2231,7 +2231,7 @@
 		       sib_info->magic != dead_info->magic)) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(3)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		sib_info->back = cpu_to_be32(dead_blkno);
@@ -2254,7 +2254,7 @@
 		if (level >= 0 && level != par_hdr.level + 1) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(4)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		level = par_hdr.level;
@@ -2267,7 +2267,7 @@
 		if (entno == par_hdr.count) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(5)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		par_blkno = be32_to_cpu(btree[entno].before);
@@ -2294,7 +2294,7 @@
 		if (unlikely(par_blkno == 0)) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(6)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		error = xfs_da3_node_read(tp, dp, par_blkno, -1, &par_buf, w);
@@ -2305,7 +2305,7 @@
 		if (par_hdr.level != level) {
 			XFS_ERROR_REPORT("xfs_da_swap_lastblock(7)",
 					 XFS_ERRLEVEL_LOW, mp);
-			error = XFS_ERROR(EFSCORRUPTED);
+			error = -EFSCORRUPTED;
 			goto done;
 		}
 		btree = dp->d_ops->node_tree_p(par_node);
@@ -2359,7 +2359,7 @@
 		error = xfs_bunmapi(tp, dp, dead_blkno, count,
 				    xfs_bmapi_aflag(w)|XFS_BMAPI_METADATA,
 				    0, args->firstblock, args->flist, &done);
-		if (error == ENOSPC) {
+		if (error == -ENOSPC) {
 			if (w != XFS_DATA_FORK)
 				break;
 			error = xfs_da3_swap_lastblock(args, &dead_blkno,
@@ -2427,7 +2427,7 @@
 		map = kmem_zalloc(nirecs * sizeof(struct xfs_buf_map),
 				  KM_SLEEP | KM_NOFS);
 		if (!map)
-			return ENOMEM;
+			return -ENOMEM;
 		*mapp = map;
 	}
 
@@ -2500,8 +2500,8 @@
 	}
 
 	if (!xfs_da_map_covers_blocks(nirecs, irecs, bno, nfsb)) {
-		error = mappedbno == -2 ? -1 : XFS_ERROR(EFSCORRUPTED);
-		if (unlikely(error == EFSCORRUPTED)) {
+		error = mappedbno == -2 ? -1 : -EFSCORRUPTED;
+		if (unlikely(error == -EFSCORRUPTED)) {
 			if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
 				int i;
 				xfs_alert(mp, "%s: bno %lld dir: inode %lld",
@@ -2561,7 +2561,7 @@
 
 	bp = xfs_trans_get_buf_map(trans, dp->i_mount->m_ddev_targp,
 				    mapp, nmap, 0);
-	error = bp ? bp->b_error : XFS_ERROR(EIO);
+	error = bp ? bp->b_error : -EIO;
 	if (error) {
 		xfs_trans_brelse(trans, bp);
 		goto out_free;
diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/libxfs/xfs_da_btree.h
similarity index 100%
rename from fs/xfs/xfs_da_btree.h
rename to fs/xfs/libxfs/xfs_da_btree.h
diff --git a/fs/xfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
similarity index 100%
rename from fs/xfs/xfs_da_format.c
rename to fs/xfs/libxfs/xfs_da_format.c
diff --git a/fs/xfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h
similarity index 100%
rename from fs/xfs/xfs_da_format.h
rename to fs/xfs/libxfs/xfs_da_format.h
diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/libxfs/xfs_dinode.h
similarity index 100%
rename from fs/xfs/xfs_dinode.h
rename to fs/xfs/libxfs/xfs_dinode.h
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c
similarity index 98%
rename from fs/xfs/xfs_dir2.c
rename to fs/xfs/libxfs/xfs_dir2.c
index 79670cd..6cef221 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/libxfs/xfs_dir2.c
@@ -108,7 +108,7 @@
 	if (!mp->m_dir_geo || !mp->m_attr_geo) {
 		kmem_free(mp->m_dir_geo);
 		kmem_free(mp->m_attr_geo);
-		return ENOMEM;
+		return -ENOMEM;
 	}
 
 	/* set up directory geometry */
@@ -202,7 +202,7 @@
 		xfs_warn(mp, "Invalid inode number 0x%Lx",
 				(unsigned long long) ino);
 		XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -226,7 +226,7 @@
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
-		return ENOMEM;
+		return -ENOMEM;
 
 	args->geo = dp->i_mount->m_dir_geo;
 	args->dp = dp;
@@ -261,7 +261,7 @@
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
-		return ENOMEM;
+		return -ENOMEM;
 
 	args->geo = dp->i_mount->m_dir_geo;
 	args->name = name->name;
@@ -314,18 +314,18 @@
 	int		len)
 {
 	if (args->cmpresult == XFS_CMP_DIFFERENT)
-		return ENOENT;
+		return -ENOENT;
 	if (args->cmpresult != XFS_CMP_CASE ||
 					!(args->op_flags & XFS_DA_OP_CILOOKUP))
-		return EEXIST;
+		return -EEXIST;
 
 	args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL);
 	if (!args->value)
-		return ENOMEM;
+		return -ENOMEM;
 
 	memcpy(args->value, name, len);
 	args->valuelen = len;
-	return EEXIST;
+	return -EEXIST;
 }
 
 /*
@@ -392,7 +392,7 @@
 		rval = xfs_dir2_node_lookup(args);
 
 out_check_rval:
-	if (rval == EEXIST)
+	if (rval == -EEXIST)
 		rval = 0;
 	if (!rval) {
 		*inum = args->inumber;
@@ -428,7 +428,7 @@
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
-		return ENOMEM;
+		return -ENOMEM;
 
 	args->geo = dp->i_mount->m_dir_geo;
 	args->name = name->name;
@@ -493,7 +493,7 @@
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
-		return ENOMEM;
+		return -ENOMEM;
 
 	args->geo = dp->i_mount->m_dir_geo;
 	args->name = name->name;
@@ -555,7 +555,7 @@
 
 	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
 	if (!args)
-		return ENOMEM;
+		return -ENOMEM;
 
 	args->geo = dp->i_mount->m_dir_geo;
 	args->name = name->name;
diff --git a/fs/xfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
similarity index 100%
rename from fs/xfs/xfs_dir2.h
rename to fs/xfs/libxfs/xfs_dir2.h
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
similarity index 98%
rename from fs/xfs/xfs_dir2_block.c
rename to fs/xfs/libxfs/xfs_dir2_block.c
index c7cd315..9628cec 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -91,9 +91,9 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	     !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_dir3_block_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -108,7 +108,7 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_block_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -392,7 +392,7 @@
 	if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
 		xfs_trans_brelse(tp, bp);
 		if (!dup)
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		return 0;
 	}
 
@@ -402,7 +402,7 @@
 	if (!dup) {
 		/* Don't have a space reservation: return no-space.  */
 		if (args->total == 0)
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		/*
 		 * Convert to the next larger format.
 		 * Then add the new entry in that format.
@@ -647,7 +647,7 @@
 	args->filetype = dp->d_ops->data_get_ftype(dep);
 	error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
 	xfs_trans_brelse(args->trans, bp);
-	return XFS_ERROR(error);
+	return error;
 }
 
 /*
@@ -703,7 +703,7 @@
 		if (low > high) {
 			ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
 			xfs_trans_brelse(tp, bp);
-			return XFS_ERROR(ENOENT);
+			return -ENOENT;
 		}
 	}
 	/*
@@ -751,7 +751,7 @@
 	 * No match, release the buffer and return ENOENT.
 	 */
 	xfs_trans_brelse(tp, bp);
-	return XFS_ERROR(ENOENT);
+	return -ENOENT;
 }
 
 /*
@@ -1091,7 +1091,7 @@
 	 */
 	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(mp));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data;
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
similarity index 99%
rename from fs/xfs/xfs_dir2_data.c
rename to fs/xfs/libxfs/xfs_dir2_data.c
index 8c2f642..fdd803f 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -100,7 +100,7 @@
 		break;
 	default:
 		XFS_ERROR_REPORT("Bad Magic", XFS_ERRLEVEL_LOW, mp);
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 	}
 
 	/*
@@ -256,7 +256,7 @@
 		xfs_dir3_data_verify(bp);
 		return;
 	default:
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		break;
 	}
@@ -270,9 +270,9 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	     !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
-		 xfs_buf_ioerror(bp, EFSBADCRC);
+		 xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_dir3_data_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -287,7 +287,7 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_data_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
similarity index 98%
rename from fs/xfs/xfs_dir2_leaf.c
rename to fs/xfs/libxfs/xfs_dir2_leaf.c
index fb0aad4..a19174e 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -183,9 +183,9 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	     !xfs_buf_verify_cksum(bp, XFS_DIR3_LEAF_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_dir3_leaf_verify(bp, magic))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -201,7 +201,7 @@
 	struct xfs_dir3_leaf_hdr *hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_leaf_verify(bp, magic)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -731,7 +731,7 @@
 		if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
 							args->total == 0) {
 			xfs_trans_brelse(tp, lbp);
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		}
 		/*
 		 * Convert to node form.
@@ -755,7 +755,7 @@
 	 */
 	if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
 		xfs_trans_brelse(tp, lbp);
-		return use_block == -1 ? XFS_ERROR(ENOSPC) : 0;
+		return use_block == -1 ? -ENOSPC : 0;
 	}
 	/*
 	 * If no allocations are allowed, return now before we've
@@ -763,7 +763,7 @@
 	 */
 	if (args->total == 0 && use_block == -1) {
 		xfs_trans_brelse(tp, lbp);
-		return XFS_ERROR(ENOSPC);
+		return -ENOSPC;
 	}
 	/*
 	 * Need to compact the leaf entries, removing stale ones.
@@ -1198,7 +1198,7 @@
 	error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
 	xfs_trans_brelse(tp, dbp);
 	xfs_trans_brelse(tp, lbp);
-	return XFS_ERROR(error);
+	return error;
 }
 
 /*
@@ -1327,13 +1327,13 @@
 		return 0;
 	}
 	/*
-	 * No match found, return ENOENT.
+	 * No match found, return -ENOENT.
 	 */
 	ASSERT(cidb == -1);
 	if (dbp)
 		xfs_trans_brelse(tp, dbp);
 	xfs_trans_brelse(tp, lbp);
-	return XFS_ERROR(ENOENT);
+	return -ENOENT;
 }
 
 /*
@@ -1440,7 +1440,7 @@
 			 * Just go on, returning success, leaving the
 			 * empty block in place.
 			 */
-			if (error == ENOSPC && args->total == 0)
+			if (error == -ENOSPC && args->total == 0)
 				error = 0;
 			xfs_dir3_leaf_check(dp, lbp);
 			return error;
@@ -1641,7 +1641,7 @@
 	 * Get rid of the data block.
 	 */
 	if ((error = xfs_dir2_shrink_inode(args, db, dbp))) {
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		xfs_trans_brelse(tp, dbp);
 		return error;
 	}
@@ -1815,7 +1815,7 @@
 		 * punching out the middle of an extent, and this is an
 		 * isolated block.
 		 */
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		return error;
 	}
 	fbp = NULL;
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
similarity index 98%
rename from fs/xfs/xfs_dir2_node.c
rename to fs/xfs/libxfs/xfs_dir2_node.c
index da43d30..2ae6ac2 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -117,9 +117,9 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	    !xfs_buf_verify_cksum(bp, XFS_DIR3_FREE_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_dir3_free_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -134,7 +134,7 @@
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
 	if (!xfs_dir3_free_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
@@ -406,7 +406,7 @@
 	 * into other peoples memory
 	 */
 	if (index < 0)
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 
 	/*
 	 * If there are already the maximum number of leaf entries in
@@ -417,7 +417,7 @@
 
 	if (leafhdr.count == dp->d_ops->leaf_max_ents(args->geo)) {
 		if (!leafhdr.stale)
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		compact = leafhdr.stale > 1;
 	} else
 		compact = 0;
@@ -629,7 +629,7 @@
 							XFS_ERRLEVEL_LOW, mp);
 				if (curfdb != newfdb)
 					xfs_trans_brelse(tp, curbp);
-				return XFS_ERROR(EFSCORRUPTED);
+				return -EFSCORRUPTED;
 			}
 			curfdb = newfdb;
 			if (be16_to_cpu(bests[fi]) >= length)
@@ -660,7 +660,7 @@
 	 * Return the index, that will be the insertion point.
 	 */
 	*indexp = index;
-	return XFS_ERROR(ENOENT);
+	return -ENOENT;
 }
 
 /*
@@ -789,7 +789,7 @@
 			curbp->b_ops = &xfs_dir3_data_buf_ops;
 			xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
 			if (cmp == XFS_CMP_EXACT)
-				return XFS_ERROR(EEXIST);
+				return -EEXIST;
 		}
 	}
 	ASSERT(index == leafhdr.count || (args->op_flags & XFS_DA_OP_OKNOENT));
@@ -812,7 +812,7 @@
 		state->extravalid = 0;
 	}
 	*indexp = index;
-	return XFS_ERROR(ENOENT);
+	return -ENOENT;
 }
 
 /*
@@ -1133,7 +1133,7 @@
 		if (error == 0) {
 			fbp = NULL;
 			logfree = 0;
-		} else if (error != ENOSPC || args->total != 0)
+		} else if (error != -ENOSPC || args->total != 0)
 			return error;
 		/*
 		 * It's possible to get ENOSPC if there is no
@@ -1287,7 +1287,7 @@
 			 * In this case just drop the buffer and some one else
 			 * will eventually get rid of the empty block.
 			 */
-			else if (!(error == ENOSPC && args->total == 0))
+			else if (!(error == -ENOSPC && args->total == 0))
 				return error;
 		}
 		/*
@@ -1599,7 +1599,7 @@
 	error = xfs_da3_node_lookup_int(state, &rval);
 	if (error)
 		rval = error;
-	if (rval != ENOENT) {
+	if (rval != -ENOENT) {
 		goto done;
 	}
 	/*
@@ -1628,7 +1628,7 @@
 		 * It didn't work, we need to split the leaf block.
 		 */
 		if (args->total == 0) {
-			ASSERT(rval == ENOSPC);
+			ASSERT(rval == -ENOSPC);
 			goto done;
 		}
 		/*
@@ -1815,7 +1815,7 @@
 		 * Not allowed to allocate, return failure.
 		 */
 		if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 
 		/*
 		 * Allocate and initialize the new data block.
@@ -1876,7 +1876,7 @@
 				}
 				XFS_ERROR_REPORT("xfs_dir2_node_addname_int",
 						 XFS_ERRLEVEL_LOW, mp);
-				return XFS_ERROR(EFSCORRUPTED);
+				return -EFSCORRUPTED;
 			}
 
 			/*
@@ -2042,8 +2042,8 @@
 	error = xfs_da3_node_lookup_int(state, &rval);
 	if (error)
 		rval = error;
-	else if (rval == ENOENT && args->cmpresult == XFS_CMP_CASE) {
-		/* If a CI match, dup the actual name and return EEXIST */
+	else if (rval == -ENOENT && args->cmpresult == XFS_CMP_CASE) {
+		/* If a CI match, dup the actual name and return -EEXIST */
 		xfs_dir2_data_entry_t	*dep;
 
 		dep = (xfs_dir2_data_entry_t *)
@@ -2096,7 +2096,7 @@
 		goto out_free;
 
 	/* Didn't find it, upper layer screwed up. */
-	if (rval != EEXIST) {
+	if (rval != -EEXIST) {
 		error = rval;
 		goto out_free;
 	}
@@ -2169,7 +2169,7 @@
 	 * It should be found, since the vnodeops layer has looked it up
 	 * and locked it.  But paranoia is good.
 	 */
-	if (rval == EEXIST) {
+	if (rval == -EEXIST) {
 		struct xfs_dir2_leaf_entry *ents;
 		/*
 		 * Find the leaf entry.
@@ -2272,7 +2272,7 @@
 		 * space reservation, when breaking up an extent into two
 		 * pieces.  This is the last block of an extent.
 		 */
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		xfs_trans_brelse(tp, bp);
 		return error;
 	}
diff --git a/fs/xfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
similarity index 100%
rename from fs/xfs/xfs_dir2_priv.h
rename to fs/xfs/libxfs/xfs_dir2_priv.h
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c
similarity index 96%
rename from fs/xfs/xfs_dir2_sf.c
rename to fs/xfs/libxfs/xfs_dir2_sf.c
index 53c3be6..5079e05 100644
--- a/fs/xfs/xfs_dir2_sf.c
+++ b/fs/xfs/libxfs/xfs_dir2_sf.c
@@ -51,10 +51,9 @@
 #else
 #define	xfs_dir2_sf_check(args)
 #endif /* DEBUG */
-#if XFS_BIG_INUMS
+
 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
-#endif /* XFS_BIG_INUMS */
 
 /*
  * Given a block directory (dp/block), calculate its size as a shortform (sf)
@@ -117,10 +116,10 @@
 		isdotdot =
 			dep->namelen == 2 &&
 			dep->name[0] == '.' && dep->name[1] == '.';
-#if XFS_BIG_INUMS
+
 		if (!isdot)
 			i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
-#endif
+
 		/* take into account the file type field */
 		if (!isdot && !isdotdot) {
 			count++;
@@ -251,7 +250,7 @@
 	logflags = XFS_ILOG_CORE;
 	error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
 	if (error) {
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		goto out;
 	}
 
@@ -299,7 +298,7 @@
 
 	trace_xfs_dir2_sf_addname(args);
 
-	ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
+	ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT);
 	dp = args->dp;
 	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
 	/*
@@ -307,7 +306,7 @@
 	 */
 	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
@@ -318,7 +317,7 @@
 	 */
 	incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen);
 	objchange = 0;
-#if XFS_BIG_INUMS
+
 	/*
 	 * Do we have to change to 8 byte inodes?
 	 */
@@ -332,7 +331,7 @@
 			 (uint)sizeof(xfs_dir2_ino4_t));
 		objchange = 1;
 	}
-#endif
+
 	new_isize = (int)dp->i_d.di_size + incr_isize;
 	/*
 	 * Won't fit as shortform any more (due to size),
@@ -345,7 +344,7 @@
 		 * Just checking or no space reservation, it doesn't fit.
 		 */
 		if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		/*
 		 * Convert to block form then add the name.
 		 */
@@ -370,10 +369,8 @@
 	 */
 	else {
 		ASSERT(pick == 2);
-#if XFS_BIG_INUMS
 		if (objchange)
 			xfs_dir2_sf_toino8(args);
-#endif
 		xfs_dir2_sf_addname_hard(args, objchange, new_isize);
 	}
 	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
@@ -425,10 +422,8 @@
 	 * Update the header and inode.
 	 */
 	sfp->count++;
-#if XFS_BIG_INUMS
 	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
 		sfp->i8count++;
-#endif
 	dp->i_d.di_size = new_isize;
 	xfs_dir2_sf_check(args);
 }
@@ -516,10 +511,8 @@
 	dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
 	dp->d_ops->sf_put_ftype(sfep, args->filetype);
 	sfp->count++;
-#if XFS_BIG_INUMS
 	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
 		sfp->i8count++;
-#endif
 	/*
 	 * If there's more left to copy, do that.
 	 */
@@ -593,13 +586,8 @@
 	/*
 	 * If changing the inode number size, do it the hard way.
 	 */
-#if XFS_BIG_INUMS
-	if (objchange) {
+	if (objchange)
 		return 2;
-	}
-#else
-	ASSERT(objchange == 0);
-#endif
 	/*
 	 * If it won't fit at the end then do it the hard way (use the hole).
 	 */
@@ -650,7 +638,6 @@
 		ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX);
 	}
 	ASSERT(i8count == sfp->i8count);
-	ASSERT(XFS_BIG_INUMS || i8count == 0);
 	ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
 	ASSERT(offset +
 	       (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
@@ -738,7 +725,7 @@
 	 */
 	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
@@ -751,7 +738,7 @@
 		args->inumber = dp->i_ino;
 		args->cmpresult = XFS_CMP_EXACT;
 		args->filetype = XFS_DIR3_FT_DIR;
-		return XFS_ERROR(EEXIST);
+		return -EEXIST;
 	}
 	/*
 	 * Special case for ..
@@ -761,7 +748,7 @@
 		args->inumber = dp->d_ops->sf_get_parent_ino(sfp);
 		args->cmpresult = XFS_CMP_EXACT;
 		args->filetype = XFS_DIR3_FT_DIR;
-		return XFS_ERROR(EEXIST);
+		return -EEXIST;
 	}
 	/*
 	 * Loop over all the entries trying to match ours.
@@ -781,20 +768,20 @@
 			args->inumber = dp->d_ops->sf_get_ino(sfp, sfep);
 			args->filetype = dp->d_ops->sf_get_ftype(sfep);
 			if (cmp == XFS_CMP_EXACT)
-				return XFS_ERROR(EEXIST);
+				return -EEXIST;
 			ci_sfep = sfep;
 		}
 	}
 	ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
 	/*
 	 * Here, we can only be doing a lookup (not a rename or replace).
-	 * If a case-insensitive match was not found, return ENOENT.
+	 * If a case-insensitive match was not found, return -ENOENT.
 	 */
 	if (!ci_sfep)
-		return XFS_ERROR(ENOENT);
+		return -ENOENT;
 	/* otherwise process the CI match as required by the caller */
 	error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
-	return XFS_ERROR(error);
+	return error;
 }
 
 /*
@@ -824,7 +811,7 @@
 	 */
 	if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	ASSERT(dp->i_df.if_bytes == oldsize);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
@@ -847,7 +834,7 @@
 	 * Didn't find it.
 	 */
 	if (i == sfp->count)
-		return XFS_ERROR(ENOENT);
+		return -ENOENT;
 	/*
 	 * Calculate sizes.
 	 */
@@ -870,7 +857,6 @@
 	 */
 	xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
 	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
-#if XFS_BIG_INUMS
 	/*
 	 * Are we changing inode number size?
 	 */
@@ -880,7 +866,6 @@
 		else
 			sfp->i8count--;
 	}
-#endif
 	xfs_dir2_sf_check(args);
 	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
 	return 0;
@@ -895,12 +880,8 @@
 {
 	xfs_inode_t		*dp;		/* incore directory inode */
 	int			i;		/* entry index */
-#if XFS_BIG_INUMS || defined(DEBUG)
 	xfs_ino_t		ino=0;		/* entry old inode number */
-#endif
-#if XFS_BIG_INUMS
 	int			i8elevated;	/* sf_toino8 set i8count=1 */
-#endif
 	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
 	xfs_dir2_sf_hdr_t	*sfp;		/* shortform structure */
 
@@ -914,13 +895,13 @@
 	 */
 	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
 	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
-#if XFS_BIG_INUMS
+
 	/*
 	 * New inode number is large, and need to convert to 8-byte inodes.
 	 */
@@ -951,17 +932,15 @@
 		sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
 	} else
 		i8elevated = 0;
-#endif
+
 	ASSERT(args->namelen != 1 || args->name[0] != '.');
 	/*
 	 * Replace ..'s entry.
 	 */
 	if (args->namelen == 2 &&
 	    args->name[0] == '.' && args->name[1] == '.') {
-#if XFS_BIG_INUMS || defined(DEBUG)
 		ino = dp->d_ops->sf_get_parent_ino(sfp);
 		ASSERT(args->inumber != ino);
-#endif
 		dp->d_ops->sf_put_parent_ino(sfp, args->inumber);
 	}
 	/*
@@ -972,10 +951,8 @@
 		     i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
 			if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
 								XFS_CMP_EXACT) {
-#if XFS_BIG_INUMS || defined(DEBUG)
 				ino = dp->d_ops->sf_get_ino(sfp, sfep);
 				ASSERT(args->inumber != ino);
-#endif
 				dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
 				dp->d_ops->sf_put_ftype(sfep, args->filetype);
 				break;
@@ -986,14 +963,11 @@
 		 */
 		if (i == sfp->count) {
 			ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
-#if XFS_BIG_INUMS
 			if (i8elevated)
 				xfs_dir2_sf_toino4(args);
-#endif
-			return XFS_ERROR(ENOENT);
+			return -ENOENT;
 		}
 	}
-#if XFS_BIG_INUMS
 	/*
 	 * See if the old number was large, the new number is small.
 	 */
@@ -1020,13 +994,11 @@
 		if (!i8elevated)
 			sfp->i8count++;
 	}
-#endif
 	xfs_dir2_sf_check(args);
 	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
 	return 0;
 }
 
-#if XFS_BIG_INUMS
 /*
  * Convert from 8-byte inode numbers to 4-byte inode numbers.
  * The last 8-byte inode number is gone, but the count is still 1.
@@ -1181,4 +1153,3 @@
 	dp->i_d.di_size = newsize;
 	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
 }
-#endif	/* XFS_BIG_INUMS */
diff --git a/fs/xfs/xfs_dquot_buf.c b/fs/xfs/libxfs/xfs_dquot_buf.c
similarity index 98%
rename from fs/xfs/xfs_dquot_buf.c
rename to fs/xfs/libxfs/xfs_dquot_buf.c
index c2ac0c6..bb96933 100644
--- a/fs/xfs/xfs_dquot_buf.c
+++ b/fs/xfs/libxfs/xfs_dquot_buf.c
@@ -257,9 +257,9 @@
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
 	if (!xfs_dquot_buf_verify_crc(mp, bp))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_dquot_buf_verify(mp, bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -277,7 +277,7 @@
 	struct xfs_mount	*mp = bp->b_target->bt_mount;
 
 	if (!xfs_dquot_buf_verify(mp, bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
similarity index 96%
rename from fs/xfs/xfs_format.h
rename to fs/xfs/libxfs/xfs_format.h
index 34d85ac..7e42bba 100644
--- a/fs/xfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -68,11 +68,7 @@
 #define	XFS_RTLOBIT(w)	xfs_lowbit32(w)
 #define	XFS_RTHIBIT(w)	xfs_highbit32(w)
 
-#if XFS_BIG_BLKNOS
 #define	XFS_RTBLOCKLOG(b)	xfs_highbit64(b)
-#else
-#define	XFS_RTBLOCKLOG(b)	xfs_highbit32(b)
-#endif
 
 /*
  * Dquot and dquot block format definitions
@@ -304,23 +300,15 @@
  * Values and macros for delayed-allocation startblock fields.
  */
 #define STARTBLOCKVALBITS	17
-#define STARTBLOCKMASKBITS	(15 + XFS_BIG_BLKNOS * 20)
-#define DSTARTBLOCKMASKBITS	(15 + 20)
+#define STARTBLOCKMASKBITS	(15 + 20)
 #define STARTBLOCKMASK		\
 	(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
-#define DSTARTBLOCKMASK		\
-	(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
 
 static inline int isnullstartblock(xfs_fsblock_t x)
 {
 	return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
 }
 
-static inline int isnulldstartblock(xfs_dfsbno_t x)
-{
-	return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK;
-}
-
 static inline xfs_fsblock_t nullstartblock(int k)
 {
 	ASSERT(k < (1 << STARTBLOCKVALBITS));
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
similarity index 98%
rename from fs/xfs/xfs_ialloc.c
rename to fs/xfs/libxfs/xfs_ialloc.c
index 5960e55..b62771f 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -292,7 +292,7 @@
 					 mp->m_bsize * blks_per_cluster,
 					 XBF_UNMAPPED);
 		if (!fbuf)
-			return ENOMEM;
+			return -ENOMEM;
 
 		/* Initialize the inode buffers and log them appropriately. */
 		fbuf->b_ops = &xfs_inode_buf_ops;
@@ -380,7 +380,7 @@
 	newlen = args.mp->m_ialloc_inos;
 	if (args.mp->m_maxicount &&
 	    args.mp->m_sb.sb_icount + newlen > args.mp->m_maxicount)
-		return XFS_ERROR(ENOSPC);
+		return -ENOSPC;
 	args.minlen = args.maxlen = args.mp->m_ialloc_blks;
 	/*
 	 * First try to allocate inodes contiguous with the last-allocated
@@ -1385,7 +1385,7 @@
 		if (error) {
 			xfs_trans_brelse(tp, agbp);
 
-			if (error != ENOSPC)
+			if (error != -ENOSPC)
 				goto out_error;
 
 			xfs_perag_put(pag);
@@ -1416,7 +1416,7 @@
 			agno = 0;
 		if (agno == start_agno) {
 			*inop = NULLFSINO;
-			return noroom ? ENOSPC : 0;
+			return noroom ? -ENOSPC : 0;
 		}
 	}
 
@@ -1425,7 +1425,7 @@
 	return xfs_dialloc_ag(tp, agbp, parent, inop);
 out_error:
 	xfs_perag_put(pag);
-	return XFS_ERROR(error);
+	return error;
 }
 
 STATIC int
@@ -1682,7 +1682,7 @@
 		xfs_warn(mp, "%s: agno >= mp->m_sb.sb_agcount (%d >= %d).",
 			__func__, agno, mp->m_sb.sb_agcount);
 		ASSERT(0);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	agino = XFS_INO_TO_AGINO(mp, inode);
 	if (inode != XFS_AGINO_TO_INO(mp, agno, agino))  {
@@ -1690,14 +1690,14 @@
 			__func__, (unsigned long long)inode,
 			(unsigned long long)XFS_AGINO_TO_INO(mp, agno, agino));
 		ASSERT(0);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	agbno = XFS_AGINO_TO_AGBNO(mp, agino);
 	if (agbno >= mp->m_sb.sb_agblocks)  {
 		xfs_warn(mp, "%s: agbno >= mp->m_sb.sb_agblocks (%d >= %d).",
 			__func__, agbno, mp->m_sb.sb_agblocks);
 		ASSERT(0);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	/*
 	 * Get the allocation group header.
@@ -1769,7 +1769,7 @@
 		if (i)
 			error = xfs_inobt_get_rec(cur, &rec, &i);
 		if (!error && i == 0)
-			error = EINVAL;
+			error = -EINVAL;
 	}
 
 	xfs_trans_brelse(tp, agbp);
@@ -1780,12 +1780,12 @@
 	/* check that the returned record contains the required inode */
 	if (rec.ir_startino > agino ||
 	    rec.ir_startino + mp->m_ialloc_inos <= agino)
-		return EINVAL;
+		return -EINVAL;
 
 	/* for untrusted inodes check it is allocated first */
 	if ((flags & XFS_IGET_UNTRUSTED) &&
 	    (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino)))
-		return EINVAL;
+		return -EINVAL;
 
 	*chunk_agbno = XFS_AGINO_TO_AGBNO(mp, rec.ir_startino);
 	*offset_agbno = agbno - *chunk_agbno;
@@ -1829,7 +1829,7 @@
 		 * as they can be invalid without implying corruption.
 		 */
 		if (flags & XFS_IGET_UNTRUSTED)
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		if (agno >= mp->m_sb.sb_agcount) {
 			xfs_alert(mp,
 				"%s: agno (%d) >= mp->m_sb.sb_agcount (%d)",
@@ -1849,7 +1849,7 @@
 		}
 		xfs_stack_trace();
 #endif /* DEBUG */
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	blks_per_cluster = xfs_icluster_size_fsb(mp);
@@ -1922,7 +1922,7 @@
 			__func__, (unsigned long long) imap->im_blkno,
 			(unsigned long long) imap->im_len,
 			XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks));
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	return 0;
 }
@@ -2072,11 +2072,11 @@
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	    !xfs_buf_verify_cksum(bp, XFS_AGI_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (XFS_TEST_ERROR(!xfs_agi_verify(bp), mp,
 				XFS_ERRTAG_IALLOC_READ_AGI,
 				XFS_RANDOM_IALLOC_READ_AGI))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -2090,7 +2090,7 @@
 	struct xfs_buf_log_item	*bip = bp->b_fspriv;
 
 	if (!xfs_agi_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/libxfs/xfs_ialloc.h
similarity index 100%
rename from fs/xfs/xfs_ialloc.h
rename to fs/xfs/libxfs/xfs_ialloc.h
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c
similarity index 98%
rename from fs/xfs/xfs_ialloc_btree.c
rename to fs/xfs/libxfs/xfs_ialloc_btree.c
index 726f83a..c9b06f3 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.c
@@ -272,9 +272,9 @@
 	struct xfs_buf	*bp)
 {
 	if (!xfs_btree_sblock_verify_crc(bp))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_inobt_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
@@ -288,7 +288,7 @@
 {
 	if (!xfs_inobt_verify(bp)) {
 		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/libxfs/xfs_ialloc_btree.h
similarity index 100%
rename from fs/xfs/xfs_ialloc_btree.h
rename to fs/xfs/libxfs/xfs_ialloc_btree.h
diff --git a/fs/xfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
similarity index 98%
rename from fs/xfs/xfs_inode_buf.c
rename to fs/xfs/libxfs/xfs_inode_buf.c
index cb35ae4..f18fd2d 100644
--- a/fs/xfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -101,7 +101,7 @@
 				return;
 			}
 
-			xfs_buf_ioerror(bp, EFSCORRUPTED);
+			xfs_buf_ioerror(bp, -EFSCORRUPTED);
 			xfs_verifier_error(bp);
 #ifdef DEBUG
 			xfs_alert(mp,
@@ -174,14 +174,14 @@
 				   (int)imap->im_len, buf_flags, &bp,
 				   &xfs_inode_buf_ops);
 	if (error) {
-		if (error == EAGAIN) {
+		if (error == -EAGAIN) {
 			ASSERT(buf_flags & XBF_TRYLOCK);
 			return error;
 		}
 
-		if (error == EFSCORRUPTED &&
+		if (error == -EFSCORRUPTED &&
 		    (iget_flags & XFS_IGET_UNTRUSTED))
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 
 		xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.",
 			__func__, error);
@@ -390,7 +390,7 @@
 				__func__, ip->i_ino);
 
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, dip);
-		error = XFS_ERROR(EFSCORRUPTED);
+		error = -EFSCORRUPTED;
 		goto out_brelse;
 	}
 
diff --git a/fs/xfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
similarity index 100%
rename from fs/xfs/xfs_inode_buf.h
rename to fs/xfs/libxfs/xfs_inode_buf.h
diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
similarity index 98%
rename from fs/xfs/xfs_inode_fork.c
rename to fs/xfs/libxfs/xfs_inode_fork.c
index b031e8d..6a00f7f 100644
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -102,7 +102,7 @@
 				be64_to_cpu(dip->di_nblocks));
 		XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) {
@@ -111,7 +111,7 @@
 			dip->di_forkoff);
 		XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (unlikely((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) &&
@@ -121,7 +121,7 @@
 			ip->i_ino);
 		XFS_CORRUPTION_ERROR("xfs_iformat(realtime)",
 				     XFS_ERRLEVEL_LOW, ip->i_mount, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	switch (ip->i_d.di_mode & S_IFMT) {
@@ -132,7 +132,7 @@
 		if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) {
 			XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW,
 					      ip->i_mount, dip);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 		ip->i_d.di_size = 0;
 		ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip);
@@ -153,7 +153,7 @@
 				XFS_CORRUPTION_ERROR("xfs_iformat(4)",
 						     XFS_ERRLEVEL_LOW,
 						     ip->i_mount, dip);
-				return XFS_ERROR(EFSCORRUPTED);
+				return -EFSCORRUPTED;
 			}
 
 			di_size = be64_to_cpu(dip->di_size);
@@ -166,7 +166,7 @@
 				XFS_CORRUPTION_ERROR("xfs_iformat(5)",
 						     XFS_ERRLEVEL_LOW,
 						     ip->i_mount, dip);
-				return XFS_ERROR(EFSCORRUPTED);
+				return -EFSCORRUPTED;
 			}
 
 			size = (int)di_size;
@@ -181,13 +181,13 @@
 		default:
 			XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW,
 					 ip->i_mount);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 		break;
 
 	default:
 		XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	if (error) {
 		return error;
@@ -211,7 +211,7 @@
 			XFS_CORRUPTION_ERROR("xfs_iformat(8)",
 					     XFS_ERRLEVEL_LOW,
 					     ip->i_mount, dip);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 
 		error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size);
@@ -223,7 +223,7 @@
 		error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK);
 		break;
 	default:
-		error = XFS_ERROR(EFSCORRUPTED);
+		error = -EFSCORRUPTED;
 		break;
 	}
 	if (error) {
@@ -266,7 +266,7 @@
 			XFS_DFORK_SIZE(dip, ip->i_mount, whichfork));
 		XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	real_size = 0;
@@ -322,7 +322,7 @@
 			(unsigned long long) ip->i_ino, nex);
 		XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW,
 				     ip->i_mount, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	ifp->if_real_bytes = 0;
@@ -350,7 +350,7 @@
 					XFS_ERROR_REPORT("xfs_iformat_extents(2)",
 							 XFS_ERRLEVEL_LOW,
 							 ip->i_mount);
-					return XFS_ERROR(EFSCORRUPTED);
+					return -EFSCORRUPTED;
 				}
 	}
 	ifp->if_flags |= XFS_IFEXTENTS;
@@ -399,7 +399,7 @@
 					(unsigned long long) ip->i_ino);
 		XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW,
 					 mp, dip);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	ifp->if_broot_bytes = size;
@@ -436,7 +436,7 @@
 	if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
 		XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW,
 				 ip->i_mount);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	nextents = XFS_IFORK_NEXTENTS(ip, whichfork);
 	ifp = XFS_IFORK_PTR(ip, whichfork);
@@ -528,7 +528,7 @@
 		ifp->if_broot_bytes = (int)new_size;
 		ASSERT(XFS_BMAP_BMDR_SPACE(ifp->if_broot) <=
 			XFS_IFORK_SIZE(ip, whichfork));
-		memmove(np, op, cur_max * (uint)sizeof(xfs_dfsbno_t));
+		memmove(np, op, cur_max * (uint)sizeof(xfs_fsblock_t));
 		return;
 	}
 
@@ -575,7 +575,7 @@
 						     ifp->if_broot_bytes);
 		np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, new_broot, 1,
 						     (int)new_size);
-		memcpy(np, op, new_max * (uint)sizeof(xfs_dfsbno_t));
+		memcpy(np, op, new_max * (uint)sizeof(xfs_fsblock_t));
 	}
 	kmem_free(ifp->if_broot);
 	ifp->if_broot = new_broot;
@@ -1692,7 +1692,7 @@
 	}
 	*idxp = page_idx;
 	*erp_idxp = erp_idx;
-	return(erp);
+	return erp;
 }
 
 /*
diff --git a/fs/xfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h
similarity index 100%
rename from fs/xfs/xfs_inode_fork.h
rename to fs/xfs/libxfs/xfs_inode_fork.h
diff --git a/fs/xfs/xfs_inum.h b/fs/xfs/libxfs/xfs_inum.h
similarity index 95%
rename from fs/xfs/xfs_inum.h
rename to fs/xfs/libxfs/xfs_inum.h
index 90efdaf..4ff2278 100644
--- a/fs/xfs/xfs_inum.h
+++ b/fs/xfs/libxfs/xfs_inum.h
@@ -54,11 +54,7 @@
 #define	XFS_OFFBNO_TO_AGINO(mp,b,o)	\
 	((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o)))
 
-#if XFS_BIG_INUMS
 #define	XFS_MAXINUMBER		((xfs_ino_t)((1ULL << 56) - 1ULL))
-#else
-#define	XFS_MAXINUMBER		((xfs_ino_t)((1ULL << 32) - 1ULL))
-#endif
 #define	XFS_MAXINUMBER_32	((xfs_ino_t)((1ULL << 32) - 1ULL))
 
 #endif	/* __XFS_INUM_H__ */
diff --git a/fs/xfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
similarity index 99%
rename from fs/xfs/xfs_log_format.h
rename to fs/xfs/libxfs/xfs_log_format.h
index f0969c7..aff12f2 100644
--- a/fs/xfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -380,7 +380,7 @@
 	xfs_ictimestamp_t di_mtime;	/* time last modified */
 	xfs_ictimestamp_t di_ctime;	/* time created/inode modified */
 	xfs_fsize_t	di_size;	/* number of bytes in file */
-	xfs_drfsbno_t	di_nblocks;	/* # of direct & btree blocks used */
+	xfs_rfsblock_t	di_nblocks;	/* # of direct & btree blocks used */
 	xfs_extlen_t	di_extsize;	/* basic/minimum extent size for file */
 	xfs_extnum_t	di_nextents;	/* number of extents in data fork */
 	xfs_aextnum_t	di_anextents;	/* number of extents in attribute fork*/
@@ -516,7 +516,7 @@
  * EFI/EFD log format definitions
  */
 typedef struct xfs_extent {
-	xfs_dfsbno_t	ext_start;
+	xfs_fsblock_t	ext_start;
 	xfs_extlen_t	ext_len;
 } xfs_extent_t;
 
diff --git a/fs/xfs/xfs_log_recover.h b/fs/xfs/libxfs/xfs_log_recover.h
similarity index 100%
rename from fs/xfs/xfs_log_recover.h
rename to fs/xfs/libxfs/xfs_log_recover.h
diff --git a/fs/xfs/xfs_log_rlimit.c b/fs/xfs/libxfs/xfs_log_rlimit.c
similarity index 100%
rename from fs/xfs/xfs_log_rlimit.c
rename to fs/xfs/libxfs/xfs_log_rlimit.c
diff --git a/fs/xfs/xfs_quota_defs.h b/fs/xfs/libxfs/xfs_quota_defs.h
similarity index 98%
rename from fs/xfs/xfs_quota_defs.h
rename to fs/xfs/libxfs/xfs_quota_defs.h
index 137e209..1b0a083 100644
--- a/fs/xfs/xfs_quota_defs.h
+++ b/fs/xfs/libxfs/xfs_quota_defs.h
@@ -98,8 +98,6 @@
 #define XFS_IS_QUOTA_ON(mp)	((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
 						   XFS_GQUOTA_ACTIVE | \
 						   XFS_PQUOTA_ACTIVE))
-#define XFS_IS_OQUOTA_ON(mp)	((mp)->m_qflags & (XFS_GQUOTA_ACTIVE | \
-						   XFS_PQUOTA_ACTIVE))
 #define XFS_IS_UQUOTA_ON(mp)	((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
 #define XFS_IS_GQUOTA_ON(mp)	((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
 #define XFS_IS_PQUOTA_ON(mp)	((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
diff --git a/fs/xfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
similarity index 100%
rename from fs/xfs/xfs_rtbitmap.c
rename to fs/xfs/libxfs/xfs_rtbitmap.c
diff --git a/fs/xfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
similarity index 96%
rename from fs/xfs/xfs_sb.c
rename to fs/xfs/libxfs/xfs_sb.c
index 7703fa6..ad525a5 100644
--- a/fs/xfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -186,13 +186,13 @@
 	 */
 	if (sbp->sb_magicnum != XFS_SB_MAGIC) {
 		xfs_warn(mp, "bad magic number");
-		return XFS_ERROR(EWRONGFS);
+		return -EWRONGFS;
 	}
 
 
 	if (!xfs_sb_good_version(sbp)) {
 		xfs_warn(mp, "bad version");
-		return XFS_ERROR(EWRONGFS);
+		return -EWRONGFS;
 	}
 
 	/*
@@ -220,7 +220,7 @@
 				xfs_warn(mp,
 "Attempted to mount read-only compatible filesystem read-write.\n"
 "Filesystem can only be safely mounted read only.");
-				return XFS_ERROR(EINVAL);
+				return -EINVAL;
 			}
 		}
 		if (xfs_sb_has_incompat_feature(sbp,
@@ -230,7 +230,7 @@
 "Filesystem can not be safely mounted by this kernel.",
 				(sbp->sb_features_incompat &
 						XFS_SB_FEAT_INCOMPAT_UNKNOWN));
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 	}
 
@@ -238,13 +238,13 @@
 		if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
 			xfs_notice(mp,
 			   "Version 5 of Super block has XFS_OQUOTA bits.");
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 	} else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
 				XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
 			xfs_notice(mp,
 "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits.");
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 	}
 
 	if (unlikely(
@@ -252,7 +252,7 @@
 		xfs_warn(mp,
 		"filesystem is marked as having an external log; "
 		"specify logdev on the mount command line.");
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	if (unlikely(
@@ -260,7 +260,7 @@
 		xfs_warn(mp,
 		"filesystem is marked as having an internal log; "
 		"do not specify logdev on the mount command line.");
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	/*
@@ -294,7 +294,7 @@
 	    sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp)			||
 	    sbp->sb_shared_vn != 0)) {
 		xfs_notice(mp, "SB sanity check failed");
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	/*
@@ -305,7 +305,7 @@
 		"File system with blocksize %d bytes. "
 		"Only pagesize (%ld) or less will currently work.",
 				sbp->sb_blocksize, PAGE_SIZE);
-		return XFS_ERROR(ENOSYS);
+		return -ENOSYS;
 	}
 
 	/*
@@ -320,19 +320,19 @@
 	default:
 		xfs_warn(mp, "inode size of %d bytes not supported",
 				sbp->sb_inodesize);
-		return XFS_ERROR(ENOSYS);
+		return -ENOSYS;
 	}
 
 	if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
 	    xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
 		xfs_warn(mp,
 		"file system too large to be mounted on this system.");
-		return XFS_ERROR(EFBIG);
+		return -EFBIG;
 	}
 
 	if (check_inprogress && sbp->sb_inprogress) {
 		xfs_warn(mp, "Offline file system operation in progress!");
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -386,10 +386,11 @@
 	}
 }
 
-void
-xfs_sb_from_disk(
+static void
+__xfs_sb_from_disk(
 	struct xfs_sb	*to,
-	xfs_dsb_t	*from)
+	xfs_dsb_t	*from,
+	bool		convert_xquota)
 {
 	to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
 	to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
@@ -445,6 +446,17 @@
 	to->sb_pad = 0;
 	to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
 	to->sb_lsn = be64_to_cpu(from->sb_lsn);
+	/* Convert on-disk flags to in-memory flags? */
+	if (convert_xquota)
+		xfs_sb_quota_from_disk(to);
+}
+
+void
+xfs_sb_from_disk(
+	struct xfs_sb	*to,
+	xfs_dsb_t	*from)
+{
+	__xfs_sb_from_disk(to, from, true);
 }
 
 static inline void
@@ -577,7 +589,11 @@
 	struct xfs_mount *mp = bp->b_target->bt_mount;
 	struct xfs_sb	sb;
 
-	xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp));
+	/*
+	 * Use call variant which doesn't convert quota flags from disk 
+	 * format, because xfs_mount_validate_sb checks the on-disk flags.
+	 */
+	__xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false);
 
 	/*
 	 * Only check the in progress field for the primary superblock as
@@ -620,7 +636,7 @@
 			/* Only fail bad secondaries on a known V5 filesystem */
 			if (bp->b_bn == XFS_SB_DADDR ||
 			    xfs_sb_version_hascrc(&mp->m_sb)) {
-				error = EFSBADCRC;
+				error = -EFSBADCRC;
 				goto out_error;
 			}
 		}
@@ -630,7 +646,7 @@
 out_error:
 	if (error) {
 		xfs_buf_ioerror(bp, error);
-		if (error == EFSCORRUPTED || error == EFSBADCRC)
+		if (error == -EFSCORRUPTED || error == -EFSBADCRC)
 			xfs_verifier_error(bp);
 	}
 }
@@ -653,7 +669,7 @@
 		return;
 	}
 	/* quietly fail */
-	xfs_buf_ioerror(bp, EWRONGFS);
+	xfs_buf_ioerror(bp, -EWRONGFS);
 }
 
 static void
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
similarity index 98%
rename from fs/xfs/xfs_sb.h
rename to fs/xfs/libxfs/xfs_sb.h
index c43c2d6..2e73970 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -87,11 +87,11 @@
 typedef struct xfs_sb {
 	__uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
 	__uint32_t	sb_blocksize;	/* logical block size, bytes */
-	xfs_drfsbno_t	sb_dblocks;	/* number of data blocks */
-	xfs_drfsbno_t	sb_rblocks;	/* number of realtime blocks */
-	xfs_drtbno_t	sb_rextents;	/* number of realtime extents */
+	xfs_rfsblock_t	sb_dblocks;	/* number of data blocks */
+	xfs_rfsblock_t	sb_rblocks;	/* number of realtime blocks */
+	xfs_rtblock_t	sb_rextents;	/* number of realtime extents */
 	uuid_t		sb_uuid;	/* file system unique id */
-	xfs_dfsbno_t	sb_logstart;	/* starting block of log if internal */
+	xfs_fsblock_t	sb_logstart;	/* starting block of log if internal */
 	xfs_ino_t	sb_rootino;	/* root inode number */
 	xfs_ino_t	sb_rbmino;	/* bitmap inode for realtime extents */
 	xfs_ino_t	sb_rsumino;	/* summary inode for rt bitmap */
diff --git a/fs/xfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
similarity index 100%
rename from fs/xfs/xfs_shared.h
rename to fs/xfs/libxfs/xfs_shared.h
diff --git a/fs/xfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c
similarity index 97%
rename from fs/xfs/xfs_symlink_remote.c
rename to fs/xfs/libxfs/xfs_symlink_remote.c
index 23c2f25..5782f03 100644
--- a/fs/xfs/xfs_symlink_remote.c
+++ b/fs/xfs/libxfs/xfs_symlink_remote.c
@@ -133,9 +133,9 @@
 		return;
 
 	if (!xfs_buf_verify_cksum(bp, XFS_SYMLINK_CRC_OFF))
-		xfs_buf_ioerror(bp, EFSBADCRC);
+		xfs_buf_ioerror(bp, -EFSBADCRC);
 	else if (!xfs_symlink_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 
 	if (bp->b_error)
 		xfs_verifier_error(bp);
@@ -153,7 +153,7 @@
 		return;
 
 	if (!xfs_symlink_verify(bp)) {
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
+		xfs_buf_ioerror(bp, -EFSCORRUPTED);
 		xfs_verifier_error(bp);
 		return;
 	}
diff --git a/fs/xfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
similarity index 100%
rename from fs/xfs/xfs_trans_resv.c
rename to fs/xfs/libxfs/xfs_trans_resv.c
diff --git a/fs/xfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h
similarity index 100%
rename from fs/xfs/xfs_trans_resv.h
rename to fs/xfs/libxfs/xfs_trans_resv.h
diff --git a/fs/xfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
similarity index 100%
rename from fs/xfs/xfs_trans_space.h
rename to fs/xfs/libxfs/xfs_trans_space.h
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 6888ad8..a65fa5d 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -152,7 +152,7 @@
 	if (!xfs_acl)
 		return ERR_PTR(-ENOMEM);
 
-	error = -xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl,
+	error = xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl,
 							&len, ATTR_ROOT);
 	if (error) {
 		/*
@@ -210,7 +210,7 @@
 		len -= sizeof(struct xfs_acl_entry) *
 			 (XFS_ACL_MAX_ENTRIES(ip->i_mount) - acl->a_count);
 
-		error = -xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
+		error = xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
 				len, ATTR_ROOT);
 
 		kmem_free(xfs_acl);
@@ -218,7 +218,7 @@
 		/*
 		 * A NULL ACL argument means we want to remove the ACL.
 		 */
-		error = -xfs_attr_remove(ip, ea_name, ATTR_ROOT);
+		error = xfs_attr_remove(ip, ea_name, ATTR_ROOT);
 
 		/*
 		 * If the attribute didn't exist to start with that's fine.
@@ -244,7 +244,7 @@
 		iattr.ia_mode = mode;
 		iattr.ia_ctime = current_fs_time(inode->i_sb);
 
-		error = -xfs_setattr_nonsize(XFS_I(inode), &iattr, XFS_ATTR_NOACL);
+		error = xfs_setattr_nonsize(XFS_I(inode), &iattr, XFS_ATTR_NOACL);
 	}
 
 	return error;
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index faaf716..11e9b4c 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -240,7 +240,7 @@
 
 done:
 	if (error)
-		ioend->io_error = -error;
+		ioend->io_error = error;
 	xfs_destroy_ioend(ioend);
 }
 
@@ -308,14 +308,14 @@
 	int			nimaps = 1;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	if (type == XFS_IO_UNWRITTEN)
 		bmapi_flags |= XFS_BMAPI_IGSTATE;
 
 	if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) {
 		if (nonblocking)
-			return -XFS_ERROR(EAGAIN);
+			return -EAGAIN;
 		xfs_ilock(ip, XFS_ILOCK_SHARED);
 	}
 
@@ -332,14 +332,14 @@
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
 	if (error)
-		return -XFS_ERROR(error);
+		return error;
 
 	if (type == XFS_IO_DELALLOC &&
 	    (!nimaps || isnullstartblock(imap->br_startblock))) {
 		error = xfs_iomap_write_allocate(ip, offset, imap);
 		if (!error)
 			trace_xfs_map_blocks_alloc(ip, offset, count, type, imap);
-		return -XFS_ERROR(error);
+		return error;
 	}
 
 #ifdef DEBUG
@@ -502,7 +502,7 @@
 		 * time.
 		 */
 		if (fail) {
-			ioend->io_error = -fail;
+			ioend->io_error = fail;
 			xfs_finish_ioend(ioend);
 			continue;
 		}
@@ -1253,7 +1253,7 @@
 	int			new = 0;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	offset = (xfs_off_t)iblock << inode->i_blkbits;
 	ASSERT(bh_result->b_size >= (1 << inode->i_blkbits));
@@ -1302,7 +1302,7 @@
 			error = xfs_iomap_write_direct(ip, offset, size,
 						       &imap, nimaps);
 			if (error)
-				return -error;
+				return error;
 			new = 1;
 		} else {
 			/*
@@ -1415,7 +1415,7 @@
 
 out_unlock:
 	xfs_iunlock(ip, lockmode);
-	return -error;
+	return error;
 }
 
 int
diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c
index 09480c5..aa2a8b1 100644
--- a/fs/xfs/xfs_attr_inactive.c
+++ b/fs/xfs/xfs_attr_inactive.c
@@ -76,7 +76,7 @@
 		error = xfs_bmapi_read(dp, (xfs_fileoff_t)tblkno, tblkcnt,
 				       &map, &nmap, XFS_BMAPI_ATTRFORK);
 		if (error) {
-			return(error);
+			return error;
 		}
 		ASSERT(nmap == 1);
 		ASSERT(map.br_startblock != DELAYSTARTBLOCK);
@@ -95,21 +95,21 @@
 					dp->i_mount->m_ddev_targp,
 					dblkno, dblkcnt, 0);
 			if (!bp)
-				return ENOMEM;
+				return -ENOMEM;
 			xfs_trans_binval(*trans, bp);
 			/*
 			 * Roll to next transaction.
 			 */
 			error = xfs_trans_roll(trans, dp);
 			if (error)
-				return (error);
+				return error;
 		}
 
 		tblkno += map.br_blockcount;
 		tblkcnt -= map.br_blockcount;
 	}
 
-	return(0);
+	return 0;
 }
 
 /*
@@ -227,7 +227,7 @@
 	 */
 	if (level > XFS_DA_NODE_MAXDEPTH) {
 		xfs_trans_brelse(*trans, bp);	/* no locks for later trans */
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	node = bp->b_addr;
@@ -256,7 +256,7 @@
 		error = xfs_da3_node_read(*trans, dp, child_fsb, -2, &child_bp,
 						XFS_ATTR_FORK);
 		if (error)
-			return(error);
+			return error;
 		if (child_bp) {
 						/* save for re-read later */
 			child_blkno = XFS_BUF_ADDR(child_bp);
@@ -277,7 +277,7 @@
 							child_bp);
 				break;
 			default:
-				error = XFS_ERROR(EIO);
+				error = -EIO;
 				xfs_trans_brelse(*trans, child_bp);
 				break;
 			}
@@ -360,7 +360,7 @@
 		error = xfs_attr3_leaf_inactive(trans, dp, bp);
 		break;
 	default:
-		error = XFS_ERROR(EIO);
+		error = -EIO;
 		xfs_trans_brelse(*trans, bp);
 		break;
 	}
@@ -414,7 +414,7 @@
 	error = xfs_trans_reserve(trans, &M_RES(mp)->tr_attrinval, 0, 0);
 	if (error) {
 		xfs_trans_cancel(trans, 0);
-		return(error);
+		return error;
 	}
 	xfs_ilock(dp, XFS_ILOCK_EXCL);
 
@@ -443,10 +443,10 @@
 	error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
 
-	return(error);
+	return error;
 
 out:
 	xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
-	return(error);
+	return error;
 }
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index 90e2eeb..62db83a 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -50,11 +50,11 @@
 	sa = (xfs_attr_sf_sort_t *)a;
 	sb = (xfs_attr_sf_sort_t *)b;
 	if (sa->hash < sb->hash) {
-		return(-1);
+		return -1;
 	} else if (sa->hash > sb->hash) {
-		return(1);
+		return 1;
 	} else {
-		return(sa->entno - sb->entno);
+		return sa->entno - sb->entno;
 	}
 }
 
@@ -86,7 +86,7 @@
 	sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data;
 	ASSERT(sf != NULL);
 	if (!sf->hdr.count)
-		return(0);
+		return 0;
 	cursor = context->cursor;
 	ASSERT(cursor != NULL);
 
@@ -124,7 +124,7 @@
 			sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
 		}
 		trace_xfs_attr_list_sf_all(context);
-		return(0);
+		return 0;
 	}
 
 	/* do no more for a search callback */
@@ -150,7 +150,7 @@
 					     XFS_ERRLEVEL_LOW,
 					     context->dp->i_mount, sfe);
 			kmem_free(sbuf);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 
 		sbp->entno = i;
@@ -188,7 +188,7 @@
 	}
 	if (i == nsbuf) {
 		kmem_free(sbuf);
-		return(0);
+		return 0;
 	}
 
 	/*
@@ -213,7 +213,7 @@
 	}
 
 	kmem_free(sbuf);
-	return(0);
+	return 0;
 }
 
 STATIC int
@@ -243,8 +243,8 @@
 	if (cursor->blkno > 0) {
 		error = xfs_da3_node_read(NULL, dp, cursor->blkno, -1,
 					      &bp, XFS_ATTR_FORK);
-		if ((error != 0) && (error != EFSCORRUPTED))
-			return(error);
+		if ((error != 0) && (error != -EFSCORRUPTED))
+			return error;
 		if (bp) {
 			struct xfs_attr_leaf_entry *entries;
 
@@ -295,7 +295,7 @@
 						      cursor->blkno, -1, &bp,
 						      XFS_ATTR_FORK);
 			if (error)
-				return(error);
+				return error;
 			node = bp->b_addr;
 			magic = be16_to_cpu(node->hdr.info.magic);
 			if (magic == XFS_ATTR_LEAF_MAGIC ||
@@ -308,7 +308,7 @@
 						     context->dp->i_mount,
 						     node);
 				xfs_trans_brelse(NULL, bp);
-				return XFS_ERROR(EFSCORRUPTED);
+				return -EFSCORRUPTED;
 			}
 
 			dp->d_ops->node_hdr_from_disk(&nodehdr, node);
@@ -496,11 +496,11 @@
 	context->cursor->blkno = 0;
 	error = xfs_attr3_leaf_read(NULL, context->dp, 0, -1, &bp);
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	error = xfs_attr3_leaf_list_int(bp, context);
 	xfs_trans_brelse(NULL, bp);
-	return XFS_ERROR(error);
+	return error;
 }
 
 int
@@ -514,7 +514,7 @@
 	XFS_STATS_INC(xs_attr_list);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return EIO;
+		return -EIO;
 
 	/*
 	 * Decide on what work routines to call based on the inode size.
@@ -616,16 +616,16 @@
 	 * Validate the cursor.
 	 */
 	if (cursor->pad1 || cursor->pad2)
-		return(XFS_ERROR(EINVAL));
+		return -EINVAL;
 	if ((cursor->initted == 0) &&
 	    (cursor->hashval || cursor->blkno || cursor->offset))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	/*
 	 * Check for a properly aligned buffer.
 	 */
 	if (((long)buffer) & (sizeof(int)-1))
-		return XFS_ERROR(EFAULT);
+		return -EFAULT;
 	if (flags & ATTR_KERNOVAL)
 		bufsize = 0;
 
@@ -648,6 +648,6 @@
 	alist->al_offset[0] = context.bufsize;
 
 	error = xfs_attr_list_int(&context);
-	ASSERT(error >= 0);
+	ASSERT(error <= 0);
 	return error;
 }
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 64731ef..2f1e30d 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -133,7 +133,7 @@
 			mp = ntp->t_mountp;
 			if (!XFS_FORCED_SHUTDOWN(mp))
 				xfs_force_shutdown(mp,
-						   (error == EFSCORRUPTED) ?
+						   (error == -EFSCORRUPTED) ?
 						   SHUTDOWN_CORRUPT_INCORE :
 						   SHUTDOWN_META_IO_ERROR);
 			return error;
@@ -365,7 +365,7 @@
 			xfs_trans_brelse(tp, bp);
 			XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
 					 XFS_ERRLEVEL_LOW, mp);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 		xfs_trans_brelse(tp, bp);
 	} else {
@@ -425,14 +425,14 @@
 	ASSERT(level > 0);
 	pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
 	bno = be64_to_cpu(*pp);
-	ASSERT(bno != NULLDFSBNO);
+	ASSERT(bno != NULLFSBLOCK);
 	ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
 	ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
 
 	if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
 		XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
 				 mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	return 0;
@@ -524,13 +524,13 @@
 			if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
 			    ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
 			    ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
-				return XFS_ERROR(EINVAL);
+				return -EINVAL;
 		} else if (unlikely(
 			   ip->i_d.di_aformat != 0 &&
 			   ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
 			XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
 					 ip->i_mount);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 
 		prealloced = 0;
@@ -539,7 +539,7 @@
 		if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
 		    ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
 		    ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 
 		if (xfs_get_extsz_hint(ip) ||
 		    ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
@@ -559,26 +559,26 @@
 		bmv->bmv_entries = 0;
 		return 0;
 	} else if (bmv->bmv_length < 0) {
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	nex = bmv->bmv_count - 1;
 	if (nex <= 0)
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	bmvend = bmv->bmv_offset + bmv->bmv_length;
 
 
 	if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 	out = kmem_zalloc_large(bmv->bmv_count * sizeof(struct getbmapx), 0);
 	if (!out)
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 
 	xfs_ilock(ip, XFS_IOLOCK_SHARED);
 	if (whichfork == XFS_DATA_FORK) {
 		if (!(iflags & BMV_IF_DELALLOC) &&
 		    (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size)) {
-			error = -filemap_write_and_wait(VFS_I(ip)->i_mapping);
+			error = filemap_write_and_wait(VFS_I(ip)->i_mapping);
 			if (error)
 				goto out_unlock_iolock;
 
@@ -611,7 +611,7 @@
 	/*
 	 * Allocate enough space to handle "subnex" maps at a time.
 	 */
-	error = ENOMEM;
+	error = -ENOMEM;
 	subnex = 16;
 	map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
 	if (!map)
@@ -809,7 +809,7 @@
 	 * have speculative prealloc/delalloc blocks to remove.
 	 */
 	if (VFS_I(ip)->i_size == 0 &&
-	    VN_CACHED(VFS_I(ip)) == 0 &&
+	    VFS_I(ip)->i_mapping->nrpages == 0 &&
 	    ip->i_delayed_blks == 0)
 		return false;
 
@@ -882,7 +882,7 @@
 		if (need_iolock) {
 			if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
 				xfs_trans_cancel(tp, 0);
-				return EAGAIN;
+				return -EAGAIN;
 			}
 		}
 
@@ -955,14 +955,14 @@
 	trace_xfs_alloc_file_space(ip);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	error = xfs_qm_dqattach(ip, 0);
 	if (error)
 		return error;
 
 	if (len <= 0)
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	rt = XFS_IS_REALTIME_INODE(ip);
 	extsz = xfs_get_extsz_hint(ip);
@@ -1028,7 +1028,7 @@
 			/*
 			 * Free the transaction structure.
 			 */
-			ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
+			ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp));
 			xfs_trans_cancel(tp, 0);
 			break;
 		}
@@ -1065,7 +1065,7 @@
 		allocated_fsb = imapp->br_blockcount;
 
 		if (nimaps == 0) {
-			error = XFS_ERROR(ENOSPC);
+			error = -ENOSPC;
 			break;
 		}
 
@@ -1126,7 +1126,7 @@
 					mp->m_rtdev_targp : mp->m_ddev_targp,
 				  BTOBB(mp->m_sb.sb_blocksize), 0);
 	if (!bp)
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 
 	xfs_buf_unlock(bp);
 
@@ -1158,7 +1158,7 @@
 		XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock));
 
 		if (XFS_FORCED_SHUTDOWN(mp)) {
-			error = XFS_ERROR(EIO);
+			error = -EIO;
 			break;
 		}
 		xfs_buf_iorequest(bp);
@@ -1176,7 +1176,7 @@
 		XFS_BUF_WRITE(bp);
 
 		if (XFS_FORCED_SHUTDOWN(mp)) {
-			error = XFS_ERROR(EIO);
+			error = -EIO;
 			break;
 		}
 		xfs_buf_iorequest(bp);
@@ -1234,7 +1234,7 @@
 
 	rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
 	ioffset = offset & ~(rounding - 1);
-	error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+	error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
 					      ioffset, -1);
 	if (error)
 		goto out;
@@ -1315,7 +1315,7 @@
 			/*
 			 * Free the transaction structure.
 			 */
-			ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
+			ASSERT(error == -ENOSPC || XFS_FORCED_SHUTDOWN(mp));
 			xfs_trans_cancel(tp, 0);
 			break;
 		}
@@ -1557,14 +1557,14 @@
 	/* Should never get a local format */
 	if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL ||
 	    tip->i_d.di_format == XFS_DINODE_FMT_LOCAL)
-		return EINVAL;
+		return -EINVAL;
 
 	/*
 	 * if the target inode has less extents that then temporary inode then
 	 * why did userspace call us?
 	 */
 	if (ip->i_d.di_nextents < tip->i_d.di_nextents)
-		return EINVAL;
+		return -EINVAL;
 
 	/*
 	 * if the target inode is in extent form and the temp inode is in btree
@@ -1573,19 +1573,19 @@
 	 */
 	if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
 	    tip->i_d.di_format == XFS_DINODE_FMT_BTREE)
-		return EINVAL;
+		return -EINVAL;
 
 	/* Check temp in extent form to max in target */
 	if (tip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
 	    XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) >
 			XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
-		return EINVAL;
+		return -EINVAL;
 
 	/* Check target in extent form to max in temp */
 	if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
 	    XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) >
 			XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
-		return EINVAL;
+		return -EINVAL;
 
 	/*
 	 * If we are in a btree format, check that the temp root block will fit
@@ -1599,26 +1599,50 @@
 	if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 		if (XFS_IFORK_BOFF(ip) &&
 		    XFS_BMAP_BMDR_SPACE(tip->i_df.if_broot) > XFS_IFORK_BOFF(ip))
-			return EINVAL;
+			return -EINVAL;
 		if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <=
 		    XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
-			return EINVAL;
+			return -EINVAL;
 	}
 
 	/* Reciprocal target->temp btree format checks */
 	if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 		if (XFS_IFORK_BOFF(tip) &&
 		    XFS_BMAP_BMDR_SPACE(ip->i_df.if_broot) > XFS_IFORK_BOFF(tip))
-			return EINVAL;
+			return -EINVAL;
 		if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <=
 		    XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
-			return EINVAL;
+			return -EINVAL;
 	}
 
 	return 0;
 }
 
 int
+xfs_swap_extent_flush(
+	struct xfs_inode	*ip)
+{
+	int	error;
+
+	error = filemap_write_and_wait(VFS_I(ip)->i_mapping);
+	if (error)
+		return error;
+	truncate_pagecache_range(VFS_I(ip), 0, -1);
+
+	/* Verify O_DIRECT for ftmp */
+	if (VFS_I(ip)->i_mapping->nrpages)
+		return -EINVAL;
+
+	/*
+	 * Don't try to swap extents on mmap()d files because we can't lock
+	 * out races against page faults safely.
+	 */
+	if (mapping_mapped(VFS_I(ip)->i_mapping))
+		return -EBUSY;
+	return 0;
+}
+
+int
 xfs_swap_extents(
 	xfs_inode_t	*ip,	/* target inode */
 	xfs_inode_t	*tip,	/* tmp inode */
@@ -1633,51 +1657,57 @@
 	int		aforkblks = 0;
 	int		taforkblks = 0;
 	__uint64_t	tmp;
+	int		lock_flags;
 
 	tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
 	if (!tempifp) {
-		error = XFS_ERROR(ENOMEM);
+		error = -ENOMEM;
 		goto out;
 	}
 
 	/*
-	 * we have to do two separate lock calls here to keep lockdep
-	 * happy. If we try to get all the locks in one call, lock will
-	 * report false positives when we drop the ILOCK and regain them
-	 * below.
+	 * Lock up the inodes against other IO and truncate to begin with.
+	 * Then we can ensure the inodes are flushed and have no page cache
+	 * safely. Once we have done this we can take the ilocks and do the rest
+	 * of the checks.
 	 */
+	lock_flags = XFS_IOLOCK_EXCL;
 	xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL);
-	xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
 
 	/* Verify that both files have the same format */
 	if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_unlock;
 	}
 
 	/* Verify both files are either real-time or non-realtime */
 	if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_unlock;
 	}
 
-	error = -filemap_write_and_wait(VFS_I(tip)->i_mapping);
+	error = xfs_swap_extent_flush(ip);
 	if (error)
 		goto out_unlock;
-	truncate_pagecache_range(VFS_I(tip), 0, -1);
+	error = xfs_swap_extent_flush(tip);
+	if (error)
+		goto out_unlock;
 
-	/* Verify O_DIRECT for ftmp */
-	if (VN_CACHED(VFS_I(tip)) != 0) {
-		error = XFS_ERROR(EINVAL);
+	tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
+	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
+	if (error) {
+		xfs_trans_cancel(tp, 0);
 		goto out_unlock;
 	}
+	xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
+	lock_flags |= XFS_ILOCK_EXCL;
 
 	/* Verify all data are being swapped */
 	if (sxp->sx_offset != 0 ||
 	    sxp->sx_length != ip->i_d.di_size ||
 	    sxp->sx_length != tip->i_d.di_size) {
-		error = XFS_ERROR(EFAULT);
-		goto out_unlock;
+		error = -EFAULT;
+		goto out_trans_cancel;
 	}
 
 	trace_xfs_swap_extent_before(ip, 0);
@@ -1689,7 +1719,7 @@
 		xfs_notice(mp,
 		    "%s: inode 0x%llx format is incompatible for exchanging.",
 				__func__, ip->i_ino);
-		goto out_unlock;
+		goto out_trans_cancel;
 	}
 
 	/*
@@ -1703,43 +1733,9 @@
 	    (sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) ||
 	    (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) ||
 	    (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) {
-		error = XFS_ERROR(EBUSY);
-		goto out_unlock;
+		error = -EBUSY;
+		goto out_trans_cancel;
 	}
-
-	/* We need to fail if the file is memory mapped.  Once we have tossed
-	 * all existing pages, the page fault will have no option
-	 * but to go to the filesystem for pages. By making the page fault call
-	 * vop_read (or write in the case of autogrow) they block on the iolock
-	 * until we have switched the extents.
-	 */
-	if (VN_MAPPED(VFS_I(ip))) {
-		error = XFS_ERROR(EBUSY);
-		goto out_unlock;
-	}
-
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
-	xfs_iunlock(tip, XFS_ILOCK_EXCL);
-
-	/*
-	 * There is a race condition here since we gave up the
-	 * ilock.  However, the data fork will not change since
-	 * we have the iolock (locked for truncation too) so we
-	 * are safe.  We don't really care if non-io related
-	 * fields change.
-	 */
-	truncate_pagecache_range(VFS_I(ip), 0, -1);
-
-	tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
-	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
-	if (error) {
-		xfs_iunlock(ip,  XFS_IOLOCK_EXCL);
-		xfs_iunlock(tip, XFS_IOLOCK_EXCL);
-		xfs_trans_cancel(tp, 0);
-		goto out;
-	}
-	xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
-
 	/*
 	 * Count the number of extended attribute blocks
 	 */
@@ -1757,8 +1753,8 @@
 			goto out_trans_cancel;
 	}
 
-	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
-	xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+	xfs_trans_ijoin(tp, ip, lock_flags);
+	xfs_trans_ijoin(tp, tip, lock_flags);
 
 	/*
 	 * Before we've swapped the forks, lets set the owners of the forks
@@ -1887,8 +1883,8 @@
 	return error;
 
 out_unlock:
-	xfs_iunlock(ip,  XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
-	xfs_iunlock(tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
+	xfs_iunlock(ip, lock_flags);
+	xfs_iunlock(tip, lock_flags);
 	goto out;
 
 out_trans_cancel:
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 7a34a1a..cd7b8ca 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -130,7 +130,7 @@
 	bp->b_maps = kmem_zalloc(map_count * sizeof(struct xfs_buf_map),
 				KM_NOFS);
 	if (!bp->b_maps)
-		return ENOMEM;
+		return -ENOMEM;
 	return 0;
 }
 
@@ -344,7 +344,7 @@
 		if (unlikely(page == NULL)) {
 			if (flags & XBF_READ_AHEAD) {
 				bp->b_page_count = i;
-				error = ENOMEM;
+				error = -ENOMEM;
 				goto out_free_pages;
 			}
 
@@ -465,7 +465,7 @@
 	eofs = XFS_FSB_TO_BB(btp->bt_mount, btp->bt_mount->m_sb.sb_dblocks);
 	if (blkno >= eofs) {
 		/*
-		 * XXX (dgc): we should really be returning EFSCORRUPTED here,
+		 * XXX (dgc): we should really be returning -EFSCORRUPTED here,
 		 * but none of the higher level infrastructure supports
 		 * returning a specific error on buffer lookup failures.
 		 */
@@ -1052,8 +1052,8 @@
 	xfs_buf_t		*bp,
 	int			error)
 {
-	ASSERT(error >= 0 && error <= 0xffff);
-	bp->b_error = (unsigned short)error;
+	ASSERT(error <= 0 && error >= -1000);
+	bp->b_error = error;
 	trace_xfs_buf_ioerror(bp, error, _RET_IP_);
 }
 
@@ -1064,7 +1064,7 @@
 {
 	xfs_alert(bp->b_target->bt_mount,
 "metadata I/O error: block 0x%llx (\"%s\") error %d numblks %d",
-		(__uint64_t)XFS_BUF_ADDR(bp), func, bp->b_error, bp->b_length);
+		(__uint64_t)XFS_BUF_ADDR(bp), func, -bp->b_error, bp->b_length);
 }
 
 /*
@@ -1083,7 +1083,7 @@
 	/*
 	 * No need to wait until the buffer is unpinned, we aren't flushing it.
 	 */
-	xfs_buf_ioerror(bp, EIO);
+	xfs_buf_ioerror(bp, -EIO);
 
 	/*
 	 * We're calling xfs_buf_ioend, so delete XBF_DONE flag.
@@ -1094,7 +1094,7 @@
 
 	xfs_buf_ioend(bp, 0);
 
-	return EIO;
+	return -EIO;
 }
 
 /*
@@ -1127,13 +1127,13 @@
 		 * There's no reason to mark error for
 		 * ASYNC buffers.
 		 */
-		xfs_buf_ioerror(bp, EIO);
+		xfs_buf_ioerror(bp, -EIO);
 		complete(&bp->b_iowait);
 	} else {
 		xfs_buf_relse(bp);
 	}
 
-	return EIO;
+	return -EIO;
 }
 
 STATIC int
@@ -1199,7 +1199,7 @@
 	 * buffers that require multiple bios to complete.
 	 */
 	if (!bp->b_error)
-		xfs_buf_ioerror(bp, -error);
+		xfs_buf_ioerror(bp, error);
 
 	if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
 		invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp));
@@ -1286,7 +1286,7 @@
 		 * because the caller (xfs_buf_iorequest) holds a count itself.
 		 */
 		atomic_dec(&bp->b_io_remaining);
-		xfs_buf_ioerror(bp, EIO);
+		xfs_buf_ioerror(bp, -EIO);
 		bio_put(bio);
 	}
 
@@ -1330,6 +1330,20 @@
 						   SHUTDOWN_CORRUPT_INCORE);
 				return;
 			}
+		} else if (bp->b_bn != XFS_BUF_DADDR_NULL) {
+			struct xfs_mount *mp = bp->b_target->bt_mount;
+
+			/*
+			 * non-crc filesystems don't attach verifiers during
+			 * log recovery, so don't warn for such filesystems.
+			 */
+			if (xfs_sb_version_hascrc(&mp->m_sb)) {
+				xfs_warn(mp,
+					"%s: no ops on block 0x%llx/0x%x",
+					__func__, bp->b_bn, bp->b_length);
+				xfs_hex_dump(bp->b_addr, 64);
+				dump_stack();
+			}
 		}
 	} else if (bp->b_flags & XBF_READ_AHEAD) {
 		rw = READA;
@@ -1628,7 +1642,7 @@
 		xfs_warn(btp->bt_mount,
 			"Cannot set_blocksize to %u on device %s",
 			sectorsize, name);
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	/* Set up device logical sector size mask */
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 3a7a552..c753183 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -178,7 +178,7 @@
 	atomic_t		b_io_remaining;	/* #outstanding I/O requests */
 	unsigned int		b_page_count;	/* size of page array */
 	unsigned int		b_offset;	/* page offset in first page */
-	unsigned short		b_error;	/* error code on I/O */
+	int			b_error;	/* error code on I/O */
 	const struct xfs_buf_ops	*b_ops;
 
 #ifdef XFS_BUF_LOCK_TRACKING
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 4654338..76007de 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -488,7 +488,7 @@
 		xfs_buf_lock(bp);
 		xfs_buf_hold(bp);
 		bp->b_flags |= XBF_ASYNC;
-		xfs_buf_ioerror(bp, EIO);
+		xfs_buf_ioerror(bp, -EIO);
 		XFS_BUF_UNDONE(bp);
 		xfs_buf_stale(bp);
 		xfs_buf_ioend(bp, 0);
@@ -725,7 +725,7 @@
 	bip->bli_formats = kmem_zalloc(count * sizeof(struct xfs_buf_log_format),
 				KM_SLEEP);
 	if (!bip->bli_formats)
-		return ENOMEM;
+		return -ENOMEM;
 	return 0;
 }
 
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 48e99af..f1b69ed 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -95,7 +95,7 @@
 	 */
 	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
 		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
@@ -677,7 +677,7 @@
 	trace_xfs_readdir(dp);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	ASSERT(S_ISDIR(dp->i_d.di_mode));
 	XFS_STATS_INC(xs_dir_getdents);
diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 4f11ef0..13d08a1 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -124,7 +124,7 @@
 		}
 
 		trace_xfs_discard_extent(mp, agno, fbno, flen);
-		error = -blkdev_issue_discard(bdev, dbno, dlen, GFP_NOFS, 0);
+		error = blkdev_issue_discard(bdev, dbno, dlen, GFP_NOFS, 0);
 		if (error)
 			goto out_del_cursor;
 		*blocks_trimmed += flen;
@@ -166,11 +166,11 @@
 	int			error, last_error = 0;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (!blk_queue_discard(q))
-		return -XFS_ERROR(EOPNOTSUPP);
+		return -EOPNOTSUPP;
 	if (copy_from_user(&range, urange, sizeof(range)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	/*
 	 * Truncating down the len isn't actually quite correct, but using
@@ -182,7 +182,7 @@
 	if (range.start >= XFS_FSB_TO_B(mp, mp->m_sb.sb_dblocks) ||
 	    range.minlen > XFS_FSB_TO_B(mp, XFS_ALLOC_AG_MAX_USABLE(mp)) ||
 	    range.len < mp->m_sb.sb_blocksize)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	start = BTOBB(range.start);
 	end = start + BTOBBT(range.len) - 1;
@@ -195,7 +195,7 @@
 	end_agno = xfs_daddr_to_agno(mp, end);
 
 	for (agno = start_agno; agno <= end_agno; agno++) {
-		error = -xfs_trim_extents(mp, agno, start, end, minlen,
+		error = xfs_trim_extents(mp, agno, start, end, minlen,
 					  &blocks_trimmed);
 		if (error)
 			last_error = error;
@@ -206,7 +206,7 @@
 
 	range.len = XFS_FSB_TO_B(mp, blocks_trimmed);
 	if (copy_to_user(urange, &range, sizeof(range)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -222,11 +222,11 @@
 		trace_xfs_discard_extent(mp, busyp->agno, busyp->bno,
 					 busyp->length);
 
-		error = -blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
+		error = blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
 				XFS_AGB_TO_DADDR(mp, busyp->agno, busyp->bno),
 				XFS_FSB_TO_BB(mp, busyp->length),
 				GFP_NOFS, 0);
-		if (error && error != EOPNOTSUPP) {
+		if (error && error != -EOPNOTSUPP) {
 			xfs_info(mp,
 	 "discard failed for extent [0x%llu,%u], error %d",
 				 (unsigned long long)busyp->bno,
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 3ee0cd4..63c2de4 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -327,7 +327,7 @@
 	 */
 	if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) {
 		xfs_iunlock(quotip, XFS_ILOCK_EXCL);
-		return (ESRCH);
+		return -ESRCH;
 	}
 
 	xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL);
@@ -354,7 +354,7 @@
 			       mp->m_quotainfo->qi_dqchunklen,
 			       0);
 	if (!bp) {
-		error = ENOMEM;
+		error = -ENOMEM;
 		goto error1;
 	}
 	bp->b_ops = &xfs_dquot_buf_ops;
@@ -400,7 +400,7 @@
       error0:
 	xfs_iunlock(quotip, XFS_ILOCK_EXCL);
 
-	return (error);
+	return error;
 }
 
 STATIC int
@@ -426,7 +426,7 @@
 
 	if (error) {
 		ASSERT(*bpp == NULL);
-		return XFS_ERROR(error);
+		return error;
 	}
 	(*bpp)->b_ops = &xfs_dquot_buf_ops;
 
@@ -442,7 +442,7 @@
 		if (error) {
 			/* repair failed, we're screwed */
 			xfs_trans_brelse(tp, *bpp);
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 	}
 
@@ -480,7 +480,7 @@
 		 * didn't have the quota inode lock.
 		 */
 		xfs_iunlock(quotip, lock_mode);
-		return ESRCH;
+		return -ESRCH;
 	}
 
 	/*
@@ -508,7 +508,7 @@
 		 * We don't allocate unless we're asked to
 		 */
 		if (!(flags & XFS_QMOPT_DQALLOC))
-			return ENOENT;
+			return -ENOENT;
 
 		ASSERT(tp);
 		error = xfs_qm_dqalloc(tpp, mp, dqp, quotip,
@@ -530,7 +530,7 @@
 					   mp->m_quotainfo->qi_dqchunklen,
 					   0, &bp, &xfs_dquot_buf_ops);
 
-		if (error == EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) {
+		if (error == -EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) {
 			xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff *
 						mp->m_quotainfo->qi_dqperchunk;
 			ASSERT(bp == NULL);
@@ -539,7 +539,7 @@
 
 		if (error) {
 			ASSERT(bp == NULL);
-			return XFS_ERROR(error);
+			return error;
 		}
 	}
 
@@ -547,7 +547,7 @@
 	*O_bpp = bp;
 	*O_ddpp = bp->b_addr + dqp->q_bufoffset;
 
-	return (0);
+	return 0;
 }
 
 
@@ -715,7 +715,7 @@
 	if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
 	    (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) ||
 	    (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) {
-		return (ESRCH);
+		return -ESRCH;
 	}
 
 #ifdef DEBUG
@@ -723,7 +723,7 @@
 		if ((xfs_dqerror_target == mp->m_ddev_targp) &&
 		    (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) {
 			xfs_debug(mp, "Returning error in dqget");
-			return (EIO);
+			return -EIO;
 		}
 	}
 
@@ -796,14 +796,14 @@
 		} else {
 			/* inode stays locked on return */
 			xfs_qm_dqdestroy(dqp);
-			return XFS_ERROR(ESRCH);
+			return -ESRCH;
 		}
 	}
 
 	mutex_lock(&qi->qi_tree_lock);
-	error = -radix_tree_insert(tree, id, dqp);
+	error = radix_tree_insert(tree, id, dqp);
 	if (unlikely(error)) {
-		WARN_ON(error != EEXIST);
+		WARN_ON(error != -EEXIST);
 
 		/*
 		 * Duplicate found. Just throw away the new dquot and start
@@ -829,7 +829,7 @@
 	ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL));
 	trace_xfs_dqget_miss(dqp);
 	*O_dqpp = dqp;
-	return (0);
+	return 0;
 }
 
 /*
@@ -966,7 +966,7 @@
 					     SHUTDOWN_CORRUPT_INCORE);
 		else
 			spin_unlock(&mp->m_ail->xa_lock);
-		error = XFS_ERROR(EIO);
+		error = -EIO;
 		goto out_unlock;
 	}
 
@@ -974,7 +974,8 @@
 	 * Get the buffer containing the on-disk dquot
 	 */
 	error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno,
-				   mp->m_quotainfo->qi_dqchunklen, 0, &bp, NULL);
+				   mp->m_quotainfo->qi_dqchunklen, 0, &bp,
+				   &xfs_dquot_buf_ops);
 	if (error)
 		goto out_unlock;
 
@@ -992,7 +993,7 @@
 		xfs_buf_relse(bp);
 		xfs_dqfunlock(dqp);
 		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	/* This is the only portion of data that needs to persist */
@@ -1045,7 +1046,7 @@
 
 out_unlock:
 	xfs_dqfunlock(dqp);
-	return XFS_ERROR(EIO);
+	return -EIO;
 }
 
 /*
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 68a68f7..c24c67e 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -139,6 +139,21 @@
 	}
 }
 
+/*
+ * Check whether a dquot is under low free space conditions. We assume the quota
+ * is enabled and enforced.
+ */
+static inline bool xfs_dquot_lowsp(struct xfs_dquot *dqp)
+{
+	int64_t freesp;
+
+	freesp = be64_to_cpu(dqp->q_core.d_blk_hardlimit) - dqp->q_res_bcount;
+	if (freesp < dqp->q_low_space[XFS_QLOWSP_1_PCNT])
+		return true;
+
+	return false;
+}
+
 #define XFS_DQ_IS_LOCKED(dqp)	(mutex_is_locked(&((dqp)->q_qlock)))
 #define XFS_DQ_IS_DIRTY(dqp)	((dqp)->dq_flags & XFS_DQ_DIRTY)
 #define XFS_QM_ISUDQ(dqp)	((dqp)->dq_flags & XFS_DQ_USER)
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index edac5b0..b92fd7bc 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -27,29 +27,6 @@
 
 #ifdef DEBUG
 
-int	xfs_etrap[XFS_ERROR_NTRAP] = {
-	0,
-};
-
-int
-xfs_error_trap(int e)
-{
-	int i;
-
-	if (!e)
-		return 0;
-	for (i = 0; i < XFS_ERROR_NTRAP; i++) {
-		if (xfs_etrap[i] == 0)
-			break;
-		if (e != xfs_etrap[i])
-			continue;
-		xfs_notice(NULL, "%s: error %d", __func__, e);
-		BUG();
-		break;
-	}
-	return e;
-}
-
 int	xfs_etest[XFS_NUM_INJECT_ERROR];
 int64_t	xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
 char *	xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
@@ -190,7 +167,7 @@
 	struct xfs_mount *mp = bp->b_target->bt_mount;
 
 	xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
-		  bp->b_error == EFSBADCRC ? "CRC error" : "corruption",
+		  bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
 		  __return_address, bp->b_bn);
 
 	xfs_alert(mp, "Unmount and run xfs_repair");
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index c1c57d4..279a76e 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -18,15 +18,6 @@
 #ifndef	__XFS_ERROR_H__
 #define	__XFS_ERROR_H__
 
-#ifdef DEBUG
-#define	XFS_ERROR_NTRAP	10
-extern int	xfs_etrap[XFS_ERROR_NTRAP];
-extern int	xfs_error_trap(int);
-#define	XFS_ERROR(e)	xfs_error_trap(e)
-#else
-#define	XFS_ERROR(e)	(e)
-#endif
-
 struct xfs_mount;
 
 extern void xfs_error_report(const char *tag, int level, struct xfs_mount *mp,
@@ -56,7 +47,7 @@
 		if (unlikely(!fs_is_ok)) { \
 			XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_GOTO", \
 					 XFS_ERRLEVEL_LOW, NULL); \
-			error = XFS_ERROR(EFSCORRUPTED); \
+			error = -EFSCORRUPTED; \
 			goto l; \
 		} \
 	}
@@ -68,7 +59,7 @@
 		if (unlikely(!fs_is_ok)) { \
 			XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_RETURN", \
 					 XFS_ERRLEVEL_LOW, NULL); \
-			return XFS_ERROR(EFSCORRUPTED); \
+			return -EFSCORRUPTED; \
 		} \
 	}
 
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 753e467..5a6bd5d 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -147,9 +147,9 @@
 		 * We don't use ESTALE directly down the chain to not
 		 * confuse applications using bulkstat that expect EINVAL.
 		 */
-		if (error == EINVAL || error == ENOENT)
-			error = ESTALE;
-		return ERR_PTR(-error);
+		if (error == -EINVAL || error == -ENOENT)
+			error = -ESTALE;
+		return ERR_PTR(error);
 	}
 
 	if (ip->i_d.di_gen != generation) {
@@ -217,7 +217,7 @@
 
 	error = xfs_lookup(XFS_I(child->d_inode), &xfs_name_dotdot, &cip, NULL);
 	if (unlikely(error))
-		return ERR_PTR(-error);
+		return ERR_PTR(error);
 
 	return d_obtain_alias(VFS_I(cip));
 }
@@ -237,7 +237,7 @@
 
 	if (!lsn)
 		return 0;
-	return -_xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
+	return _xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
 }
 
 const struct export_operations xfs_export_operations = {
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index fb7a4c1..c432741 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -298,7 +298,7 @@
 		}
 		return 0;
 	}
-	return EFSCORRUPTED;
+	return -EFSCORRUPTED;
 }
 
 /*
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 1f66779..076b170 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -38,6 +38,7 @@
 #include "xfs_trace.h"
 #include "xfs_log.h"
 #include "xfs_dinode.h"
+#include "xfs_icache.h"
 
 #include <linux/aio.h>
 #include <linux/dcache.h>
@@ -155,7 +156,7 @@
 
 	if (!lsn)
 		return 0;
-	return -_xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
+	return _xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
 }
 
 STATIC int
@@ -179,7 +180,7 @@
 		return error;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	xfs_iflags_clear(ip, XFS_ITRUNCATED);
 
@@ -225,7 +226,7 @@
 	    !log_flushed)
 		xfs_blkdev_issue_flush(mp->m_ddev_targp);
 
-	return -error;
+	return error;
 }
 
 STATIC ssize_t
@@ -246,11 +247,11 @@
 	XFS_STATS_INC(xs_read_calls);
 
 	if (unlikely(file->f_flags & O_DIRECT))
-		ioflags |= IO_ISDIRECT;
+		ioflags |= XFS_IO_ISDIRECT;
 	if (file->f_mode & FMODE_NOCMTIME)
-		ioflags |= IO_INVIS;
+		ioflags |= XFS_IO_INVIS;
 
-	if (unlikely(ioflags & IO_ISDIRECT)) {
+	if (unlikely(ioflags & XFS_IO_ISDIRECT)) {
 		xfs_buftarg_t	*target =
 			XFS_IS_REALTIME_INODE(ip) ?
 				mp->m_rtdev_targp : mp->m_ddev_targp;
@@ -258,7 +259,7 @@
 		if ((pos | size) & target->bt_logical_sectormask) {
 			if (pos == i_size_read(inode))
 				return 0;
-			return -XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 	}
 
@@ -283,7 +284,7 @@
 	 * proceeed concurrently without serialisation.
 	 */
 	xfs_rw_ilock(ip, XFS_IOLOCK_SHARED);
-	if ((ioflags & IO_ISDIRECT) && inode->i_mapping->nrpages) {
+	if ((ioflags & XFS_IO_ISDIRECT) && inode->i_mapping->nrpages) {
 		xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
 		xfs_rw_ilock(ip, XFS_IOLOCK_EXCL);
 
@@ -325,7 +326,7 @@
 	XFS_STATS_INC(xs_read_calls);
 
 	if (infilp->f_mode & FMODE_NOCMTIME)
-		ioflags |= IO_INVIS;
+		ioflags |= XFS_IO_INVIS;
 
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
 		return -EIO;
@@ -524,7 +525,7 @@
 			xfs_rw_ilock(ip, *iolock);
 			goto restart;
 		}
-		error = -xfs_zero_eof(ip, *pos, i_size_read(inode));
+		error = xfs_zero_eof(ip, *pos, i_size_read(inode));
 		if (error)
 			return error;
 	}
@@ -594,7 +595,7 @@
 
 	/* DIO must be aligned to device logical sector size */
 	if ((pos | count) & target->bt_logical_sectormask)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	/* "unaligned" here means not aligned to a filesystem block */
 	if ((pos & mp->m_blockmask) || ((pos + count) & mp->m_blockmask))
@@ -689,14 +690,28 @@
 	ret = generic_perform_write(file, from, pos);
 	if (likely(ret >= 0))
 		iocb->ki_pos = pos + ret;
+
 	/*
-	 * If we just got an ENOSPC, try to write back all dirty inodes to
-	 * convert delalloc space to free up some of the excess reserved
-	 * metadata space.
+	 * If we hit a space limit, try to free up some lingering preallocated
+	 * space before returning an error. In the case of ENOSPC, first try to
+	 * write back all dirty inodes to free up some of the excess reserved
+	 * metadata space. This reduces the chances that the eofblocks scan
+	 * waits on dirty mappings. Since xfs_flush_inodes() is serialized, this
+	 * also behaves as a filter to prevent too many eofblocks scans from
+	 * running at the same time.
 	 */
-	if (ret == -ENOSPC && !enospc) {
+	if (ret == -EDQUOT && !enospc) {
+		enospc = xfs_inode_free_quota_eofblocks(ip);
+		if (enospc)
+			goto write_retry;
+	} else if (ret == -ENOSPC && !enospc) {
+		struct xfs_eofblocks eofb = {0};
+
 		enospc = 1;
 		xfs_flush_inodes(ip->i_mount);
+		eofb.eof_scan_owner = ip->i_ino; /* for locking */
+		eofb.eof_flags = XFS_EOF_FLAGS_SYNC;
+		xfs_icache_free_eofblocks(ip->i_mount, &eofb);
 		goto write_retry;
 	}
 
@@ -772,7 +787,7 @@
 		unsigned blksize_mask = (1 << inode->i_blkbits) - 1;
 
 		if (offset & blksize_mask || len & blksize_mask) {
-			error = EINVAL;
+			error = -EINVAL;
 			goto out_unlock;
 		}
 
@@ -781,7 +796,7 @@
 		 * in which case it is effectively a truncate operation
 		 */
 		if (offset + len >= i_size_read(inode)) {
-			error = EINVAL;
+			error = -EINVAL;
 			goto out_unlock;
 		}
 
@@ -794,7 +809,7 @@
 		if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 		    offset + len > i_size_read(inode)) {
 			new_size = offset + len;
-			error = -inode_newsize_ok(inode, new_size);
+			error = inode_newsize_ok(inode, new_size);
 			if (error)
 				goto out_unlock;
 		}
@@ -844,7 +859,7 @@
 
 out_unlock:
 	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
-	return -error;
+	return error;
 }
 
 
@@ -889,7 +904,7 @@
 	struct inode	*inode,
 	struct file	*filp)
 {
-	return -xfs_release(XFS_I(inode));
+	return xfs_release(XFS_I(inode));
 }
 
 STATIC int
@@ -918,7 +933,7 @@
 
 	error = xfs_readdir(ip, ctx, bufsize);
 	if (error)
-		return -error;
+		return error;
 	return 0;
 }
 
@@ -1184,7 +1199,7 @@
 
 	isize = i_size_read(inode);
 	if (start >= isize) {
-		error = ENXIO;
+		error = -ENXIO;
 		goto out_unlock;
 	}
 
@@ -1206,7 +1221,7 @@
 
 		/* No extents at given offset, must be beyond EOF */
 		if (nmap == 0) {
-			error = ENXIO;
+			error = -ENXIO;
 			goto out_unlock;
 		}
 
@@ -1237,7 +1252,7 @@
 		 * we are reading after EOF if nothing in map[1].
 		 */
 		if (nmap == 1) {
-			error = ENXIO;
+			error = -ENXIO;
 			goto out_unlock;
 		}
 
@@ -1250,7 +1265,7 @@
 		fsbno = map[i - 1].br_startoff + map[i - 1].br_blockcount;
 		start = XFS_FSB_TO_B(mp, fsbno);
 		if (start >= isize) {
-			error = ENXIO;
+			error = -ENXIO;
 			goto out_unlock;
 		}
 	}
@@ -1262,7 +1277,7 @@
 	xfs_iunlock(ip, lock);
 
 	if (error)
-		return -error;
+		return error;
 	return offset;
 }
 
@@ -1282,13 +1297,13 @@
 	int			error;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	lock = xfs_ilock_data_map_shared(ip);
 
 	isize = i_size_read(inode);
 	if (start >= isize) {
-		error = ENXIO;
+		error = -ENXIO;
 		goto out_unlock;
 	}
 
@@ -1307,7 +1322,7 @@
 
 		/* No extents at given offset, must be beyond EOF */
 		if (nmap == 0) {
-			error = ENXIO;
+			error = -ENXIO;
 			goto out_unlock;
 		}
 
@@ -1370,7 +1385,7 @@
 	xfs_iunlock(ip, lock);
 
 	if (error)
-		return -error;
+		return error;
 	return offset;
 }
 
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index 8ec81be..e92730c 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -258,7 +258,7 @@
 	if (*agp == NULLAGNUMBER)
 		return 0;
 
-	err = ENOMEM;
+	err = -ENOMEM;
 	item = kmem_alloc(sizeof(*item), KM_MAYFAIL);
 	if (!item)
 		goto out_put_ag;
@@ -268,7 +268,7 @@
 
 	err = xfs_mru_cache_insert(mp->m_filestream, ip->i_ino, &item->mru);
 	if (err) {
-		if (err == EEXIST)
+		if (err == -EEXIST)
 			err = 0;
 		goto out_free_item;
 	}
diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index d34703d..18dc721 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -255,8 +255,8 @@
 	((2 * 1024 * 1024 * 1024ULL) - XFS_MIN_LOG_BYTES)
 
 /* Used for sanity checks on superblock */
-#define XFS_MAX_DBLOCKS(s) ((xfs_drfsbno_t)(s)->sb_agcount * (s)->sb_agblocks)
-#define XFS_MIN_DBLOCKS(s) ((xfs_drfsbno_t)((s)->sb_agcount - 1) *	\
+#define XFS_MAX_DBLOCKS(s) ((xfs_rfsblock_t)(s)->sb_agcount * (s)->sb_agblocks)
+#define XFS_MIN_DBLOCKS(s) ((xfs_rfsblock_t)((s)->sb_agcount - 1) *	\
 			 (s)->sb_agblocks + XFS_MIN_AG_BLOCKS)
 
 /*
@@ -375,6 +375,9 @@
 #define XFS_EOF_FLAGS_GID		(1 << 2) /* filter by gid */
 #define XFS_EOF_FLAGS_PRID		(1 << 3) /* filter by project id */
 #define XFS_EOF_FLAGS_MINFILESIZE	(1 << 4) /* filter by min file size */
+#define XFS_EOF_FLAGS_UNION		(1 << 5) /* union filter algorithm;
+						  * kernel only, not included in
+						  * valid mask */
 #define XFS_EOF_FLAGS_VALID	\
 	(XFS_EOF_FLAGS_SYNC |	\
 	 XFS_EOF_FLAGS_UID |	\
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index d229556..f91de1e 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -168,7 +168,7 @@
 	nb = in->newblocks;
 	pct = in->imaxpct;
 	if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
 		return error;
 	dpct = pct - mp->m_sb.sb_imax_pct;
@@ -176,7 +176,7 @@
 				XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
 				XFS_FSS_TO_BB(mp, 1), 0, NULL);
 	if (!bp)
-		return EIO;
+		return -EIO;
 	if (bp->b_error) {
 		error = bp->b_error;
 		xfs_buf_relse(bp);
@@ -191,7 +191,7 @@
 		nagcount--;
 		nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
 		if (nb < mp->m_sb.sb_dblocks)
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 	}
 	new = nb - mp->m_sb.sb_dblocks;
 	oagcount = mp->m_sb.sb_agcount;
@@ -229,7 +229,7 @@
 				XFS_FSS_TO_BB(mp, 1), 0,
 				&xfs_agf_buf_ops);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -270,7 +270,7 @@
 				XFS_FSS_TO_BB(mp, 1), 0,
 				&xfs_agfl_buf_ops);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -298,7 +298,7 @@
 				XFS_FSS_TO_BB(mp, 1), 0,
 				&xfs_agi_buf_ops);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -336,7 +336,7 @@
 				&xfs_allocbt_buf_ops);
 
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -365,7 +365,7 @@
 				BTOBB(mp->m_sb.sb_blocksize), 0,
 				&xfs_allocbt_buf_ops);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -395,7 +395,7 @@
 				BTOBB(mp->m_sb.sb_blocksize), 0,
 				&xfs_inobt_buf_ops);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error0;
 		}
 
@@ -420,7 +420,7 @@
 				BTOBB(mp->m_sb.sb_blocksize), 0,
 				&xfs_inobt_buf_ops);
 			if (!bp) {
-				error = ENOMEM;
+				error = -ENOMEM;
 				goto error0;
 			}
 
@@ -531,7 +531,7 @@
 				bp->b_ops = &xfs_sb_buf_ops;
 				xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
 			} else
-				error = ENOMEM;
+				error = -ENOMEM;
 		}
 
 		/*
@@ -576,17 +576,17 @@
 
 	nb = in->newblocks;
 	if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	if (nb == mp->m_sb.sb_logblocks &&
 	    in->isint == (mp->m_sb.sb_logstart != 0))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	/*
 	 * Moving the log is hard, need new interfaces to sync
 	 * the log first, hold off all activity while moving it.
 	 * Can have shorter or longer log in the same space,
 	 * or transform internal to external log or vice versa.
 	 */
-	return XFS_ERROR(ENOSYS);
+	return -ENOSYS;
 }
 
 /*
@@ -604,9 +604,9 @@
 	int error;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return XFS_ERROR(EPERM);
+		return -EPERM;
 	if (!mutex_trylock(&mp->m_growlock))
-		return XFS_ERROR(EWOULDBLOCK);
+		return -EWOULDBLOCK;
 	error = xfs_growfs_data_private(mp, in);
 	mutex_unlock(&mp->m_growlock);
 	return error;
@@ -620,9 +620,9 @@
 	int error;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return XFS_ERROR(EPERM);
+		return -EPERM;
 	if (!mutex_trylock(&mp->m_growlock))
-		return XFS_ERROR(EWOULDBLOCK);
+		return -EWOULDBLOCK;
 	error = xfs_growfs_log_private(mp, in);
 	mutex_unlock(&mp->m_growlock);
 	return error;
@@ -674,7 +674,7 @@
 	/* If inval is null, report current values and return */
 	if (inval == (__uint64_t *)NULL) {
 		if (!outval)
-			return EINVAL;
+			return -EINVAL;
 		outval->resblks = mp->m_resblks;
 		outval->resblks_avail = mp->m_resblks_avail;
 		return 0;
@@ -757,7 +757,7 @@
 		int error;
 		error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
 						 fdblks_delta, 0);
-		if (error == ENOSPC)
+		if (error == -ENOSPC)
 			goto retry;
 	}
 	return 0;
@@ -818,7 +818,7 @@
 				SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
 		break;
 	default:
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	return 0;
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index c48df5f..981b2cf 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -33,6 +33,9 @@
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_bmap_util.h"
+#include "xfs_quota.h"
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
 
 #include <linux/kthread.h>
 #include <linux/freezer.h>
@@ -158,7 +161,7 @@
 	if (ip->i_ino != ino) {
 		trace_xfs_iget_skip(ip);
 		XFS_STATS_INC(xs_ig_frecycle);
-		error = EAGAIN;
+		error = -EAGAIN;
 		goto out_error;
 	}
 
@@ -176,7 +179,7 @@
 	if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) {
 		trace_xfs_iget_skip(ip);
 		XFS_STATS_INC(xs_ig_frecycle);
-		error = EAGAIN;
+		error = -EAGAIN;
 		goto out_error;
 	}
 
@@ -184,7 +187,7 @@
 	 * If lookup is racing with unlink return an error immediately.
 	 */
 	if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) {
-		error = ENOENT;
+		error = -ENOENT;
 		goto out_error;
 	}
 
@@ -206,7 +209,7 @@
 		spin_unlock(&ip->i_flags_lock);
 		rcu_read_unlock();
 
-		error = -inode_init_always(mp->m_super, inode);
+		error = inode_init_always(mp->m_super, inode);
 		if (error) {
 			/*
 			 * Re-initializing the inode failed, and we are in deep
@@ -243,7 +246,7 @@
 		/* If the VFS inode is being torn down, pause and try again. */
 		if (!igrab(inode)) {
 			trace_xfs_iget_skip(ip);
-			error = EAGAIN;
+			error = -EAGAIN;
 			goto out_error;
 		}
 
@@ -285,7 +288,7 @@
 
 	ip = xfs_inode_alloc(mp, ino);
 	if (!ip)
-		return ENOMEM;
+		return -ENOMEM;
 
 	error = xfs_iread(mp, tp, ip, flags);
 	if (error)
@@ -294,7 +297,7 @@
 	trace_xfs_iget_miss(ip);
 
 	if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
-		error = ENOENT;
+		error = -ENOENT;
 		goto out_destroy;
 	}
 
@@ -305,7 +308,7 @@
 	 * recurse into the file system.
 	 */
 	if (radix_tree_preload(GFP_NOFS)) {
-		error = EAGAIN;
+		error = -EAGAIN;
 		goto out_destroy;
 	}
 
@@ -341,7 +344,7 @@
 	if (unlikely(error)) {
 		WARN_ON(error != -EEXIST);
 		XFS_STATS_INC(xs_ig_dup);
-		error = EAGAIN;
+		error = -EAGAIN;
 		goto out_preload_end;
 	}
 	spin_unlock(&pag->pag_ici_lock);
@@ -408,7 +411,7 @@
 
 	/* reject inode numbers outside existing AGs */
 	if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
-		return EINVAL;
+		return -EINVAL;
 
 	/* get the perag structure and ensure that it's inode capable */
 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
@@ -445,7 +448,7 @@
 	return 0;
 
 out_error_or_again:
-	if (error == EAGAIN) {
+	if (error == -EAGAIN) {
 		delay(1);
 		goto again;
 	}
@@ -489,18 +492,18 @@
 
 	/* nothing to sync during shutdown */
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 
 	/* If we can't grab the inode, it must on it's way to reclaim. */
 	if (!igrab(inode))
-		return ENOENT;
+		return -ENOENT;
 
 	/* inode is valid */
 	return 0;
 
 out_unlock_noent:
 	spin_unlock(&ip->i_flags_lock);
-	return ENOENT;
+	return -ENOENT;
 }
 
 STATIC int
@@ -583,16 +586,16 @@
 				continue;
 			error = execute(batch[i], flags, args);
 			IRELE(batch[i]);
-			if (error == EAGAIN) {
+			if (error == -EAGAIN) {
 				skipped++;
 				continue;
 			}
-			if (error && last_error != EFSCORRUPTED)
+			if (error && last_error != -EFSCORRUPTED)
 				last_error = error;
 		}
 
 		/* bail out if the filesystem is corrupted.  */
-		if (error == EFSCORRUPTED)
+		if (error == -EFSCORRUPTED)
 			break;
 
 		cond_resched();
@@ -652,11 +655,11 @@
 		xfs_perag_put(pag);
 		if (error) {
 			last_error = error;
-			if (error == EFSCORRUPTED)
+			if (error == -EFSCORRUPTED)
 				break;
 		}
 	}
-	return XFS_ERROR(last_error);
+	return last_error;
 }
 
 int
@@ -680,11 +683,11 @@
 		xfs_perag_put(pag);
 		if (error) {
 			last_error = error;
-			if (error == EFSCORRUPTED)
+			if (error == -EFSCORRUPTED)
 				break;
 		}
 	}
-	return XFS_ERROR(last_error);
+	return last_error;
 }
 
 /*
@@ -944,7 +947,7 @@
 	 * see the stale flag set on the inode.
 	 */
 	error = xfs_iflush(ip, &bp);
-	if (error == EAGAIN) {
+	if (error == -EAGAIN) {
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 		/* backoff longer than in xfs_ifree_cluster */
 		delay(2);
@@ -997,7 +1000,7 @@
 	xfs_iflags_clear(ip, XFS_IRECLAIM);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	/*
-	 * We could return EAGAIN here to make reclaim rescan the inode tree in
+	 * We could return -EAGAIN here to make reclaim rescan the inode tree in
 	 * a short while. However, this just burns CPU time scanning the tree
 	 * waiting for IO to complete and the reclaim work never goes back to
 	 * the idle state. Instead, return 0 to let the next scheduled
@@ -1100,7 +1103,7 @@
 				if (!batch[i])
 					continue;
 				error = xfs_reclaim_inode(batch[i], pag, flags);
-				if (error && last_error != EFSCORRUPTED)
+				if (error && last_error != -EFSCORRUPTED)
 					last_error = error;
 			}
 
@@ -1129,7 +1132,7 @@
 		trylock = 0;
 		goto restart;
 	}
-	return XFS_ERROR(last_error);
+	return last_error;
 }
 
 int
@@ -1203,6 +1206,30 @@
 	return 1;
 }
 
+/*
+ * A union-based inode filtering algorithm. Process the inode if any of the
+ * criteria match. This is for global/internal scans only.
+ */
+STATIC int
+xfs_inode_match_id_union(
+	struct xfs_inode	*ip,
+	struct xfs_eofblocks	*eofb)
+{
+	if ((eofb->eof_flags & XFS_EOF_FLAGS_UID) &&
+	    uid_eq(VFS_I(ip)->i_uid, eofb->eof_uid))
+		return 1;
+
+	if ((eofb->eof_flags & XFS_EOF_FLAGS_GID) &&
+	    gid_eq(VFS_I(ip)->i_gid, eofb->eof_gid))
+		return 1;
+
+	if ((eofb->eof_flags & XFS_EOF_FLAGS_PRID) &&
+	    xfs_get_projid(ip) == eofb->eof_prid)
+		return 1;
+
+	return 0;
+}
+
 STATIC int
 xfs_inode_free_eofblocks(
 	struct xfs_inode	*ip,
@@ -1211,6 +1238,10 @@
 {
 	int ret;
 	struct xfs_eofblocks *eofb = args;
+	bool need_iolock = true;
+	int match;
+
+	ASSERT(!eofb || (eofb && eofb->eof_scan_owner != 0));
 
 	if (!xfs_can_free_eofblocks(ip, false)) {
 		/* inode could be preallocated or append-only */
@@ -1228,19 +1259,31 @@
 		return 0;
 
 	if (eofb) {
-		if (!xfs_inode_match_id(ip, eofb))
+		if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
+			match = xfs_inode_match_id_union(ip, eofb);
+		else
+			match = xfs_inode_match_id(ip, eofb);
+		if (!match)
 			return 0;
 
 		/* skip the inode if the file size is too small */
 		if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
 		    XFS_ISIZE(ip) < eofb->eof_min_file_size)
 			return 0;
+
+		/*
+		 * A scan owner implies we already hold the iolock. Skip it in
+		 * xfs_free_eofblocks() to avoid deadlock. This also eliminates
+		 * the possibility of EAGAIN being returned.
+		 */
+		if (eofb->eof_scan_owner == ip->i_ino)
+			need_iolock = false;
 	}
 
-	ret = xfs_free_eofblocks(ip->i_mount, ip, true);
+	ret = xfs_free_eofblocks(ip->i_mount, ip, need_iolock);
 
 	/* don't revisit the inode if we're not waiting */
-	if (ret == EAGAIN && !(flags & SYNC_WAIT))
+	if (ret == -EAGAIN && !(flags & SYNC_WAIT))
 		ret = 0;
 
 	return ret;
@@ -1260,6 +1303,55 @@
 					 eofb, XFS_ICI_EOFBLOCKS_TAG);
 }
 
+/*
+ * Run eofblocks scans on the quotas applicable to the inode. For inodes with
+ * multiple quotas, we don't know exactly which quota caused an allocation
+ * failure. We make a best effort by including each quota under low free space
+ * conditions (less than 1% free space) in the scan.
+ */
+int
+xfs_inode_free_quota_eofblocks(
+	struct xfs_inode *ip)
+{
+	int scan = 0;
+	struct xfs_eofblocks eofb = {0};
+	struct xfs_dquot *dq;
+
+	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+
+	/*
+	 * Set the scan owner to avoid a potential livelock. Otherwise, the scan
+	 * can repeatedly trylock on the inode we're currently processing. We
+	 * run a sync scan to increase effectiveness and use the union filter to
+	 * cover all applicable quotas in a single scan.
+	 */
+	eofb.eof_scan_owner = ip->i_ino;
+	eofb.eof_flags = XFS_EOF_FLAGS_UNION|XFS_EOF_FLAGS_SYNC;
+
+	if (XFS_IS_UQUOTA_ENFORCED(ip->i_mount)) {
+		dq = xfs_inode_dquot(ip, XFS_DQ_USER);
+		if (dq && xfs_dquot_lowsp(dq)) {
+			eofb.eof_uid = VFS_I(ip)->i_uid;
+			eofb.eof_flags |= XFS_EOF_FLAGS_UID;
+			scan = 1;
+		}
+	}
+
+	if (XFS_IS_GQUOTA_ENFORCED(ip->i_mount)) {
+		dq = xfs_inode_dquot(ip, XFS_DQ_GROUP);
+		if (dq && xfs_dquot_lowsp(dq)) {
+			eofb.eof_gid = VFS_I(ip)->i_gid;
+			eofb.eof_flags |= XFS_EOF_FLAGS_GID;
+			scan = 1;
+		}
+	}
+
+	if (scan)
+		xfs_icache_free_eofblocks(ip->i_mount, &eofb);
+
+	return scan;
+}
+
 void
 xfs_inode_set_eofblocks_tag(
 	xfs_inode_t	*ip)
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 9cf017b..46748b8 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -27,6 +27,7 @@
 	kgid_t		eof_gid;
 	prid_t		eof_prid;
 	__u64		eof_min_file_size;
+	xfs_ino_t	eof_scan_owner;
 };
 
 #define SYNC_WAIT		0x0001	/* wait for i/o to complete */
@@ -57,6 +58,7 @@
 void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
 void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
 int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
+int xfs_inode_free_quota_eofblocks(struct xfs_inode *ip);
 void xfs_eofblocks_worker(struct work_struct *);
 
 int xfs_inode_ag_iterator(struct xfs_mount *mp,
@@ -72,31 +74,32 @@
 	struct xfs_eofblocks		*dst)
 {
 	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
-		return EINVAL;
+		return -EINVAL;
 
 	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
-		return EINVAL;
+		return -EINVAL;
 
 	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
 	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
-		return EINVAL;
+		return -EINVAL;
 
 	dst->eof_flags = src->eof_flags;
 	dst->eof_prid = src->eof_prid;
 	dst->eof_min_file_size = src->eof_min_file_size;
+	dst->eof_scan_owner = NULLFSINO;
 
 	dst->eof_uid = INVALID_UID;
 	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
 		dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
 		if (!uid_valid(dst->eof_uid))
-			return EINVAL;
+			return -EINVAL;
 	}
 
 	dst->eof_gid = INVALID_GID;
 	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
 		dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
 		if (!gid_valid(dst->eof_gid))
-			return EINVAL;
+			return -EINVAL;
 	}
 	return 0;
 }
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index a6115fe..fea3c92 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -583,7 +583,7 @@
 	trace_xfs_lookup(dp, name);
 
 	if (XFS_FORCED_SHUTDOWN(dp->i_mount))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	lock_mode = xfs_ilock_data_map_shared(dp);
 	error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name);
@@ -893,7 +893,7 @@
 	}
 	if (!ialloc_context && !ip) {
 		*ipp = NULL;
-		return XFS_ERROR(ENOSPC);
+		return -ENOSPC;
 	}
 
 	/*
@@ -1088,7 +1088,7 @@
 	trace_xfs_create(dp, name);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	prid = xfs_get_initial_prid(dp);
 
@@ -1125,12 +1125,12 @@
 	 */
 	tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
 	error = xfs_trans_reserve(tp, &tres, resblks, 0);
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		/* flush outstanding delalloc blocks and retry */
 		xfs_flush_inodes(mp);
 		error = xfs_trans_reserve(tp, &tres, resblks, 0);
 	}
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		/* No space at all so try a "no-allocation" reservation */
 		resblks = 0;
 		error = xfs_trans_reserve(tp, &tres, 0, 0);
@@ -1165,7 +1165,7 @@
 	error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev,
 			       prid, resblks > 0, &ip, &committed);
 	if (error) {
-		if (error == ENOSPC)
+		if (error == -ENOSPC)
 			goto out_trans_cancel;
 		goto out_trans_abort;
 	}
@@ -1184,7 +1184,7 @@
 					&first_block, &free_list, resblks ?
 					resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
 	if (error) {
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		goto out_trans_abort;
 	}
 	xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
@@ -1274,7 +1274,7 @@
 	uint			resblks;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	prid = xfs_get_initial_prid(dp);
 
@@ -1293,7 +1293,7 @@
 
 	tres = &M_RES(mp)->tr_create_tmpfile;
 	error = xfs_trans_reserve(tp, tres, resblks, 0);
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		/* No space at all so try a "no-allocation" reservation */
 		resblks = 0;
 		error = xfs_trans_reserve(tp, tres, 0, 0);
@@ -1311,7 +1311,7 @@
 	error = xfs_dir_ialloc(&tp, dp, mode, 1, 0,
 				prid, resblks > 0, &ip, NULL);
 	if (error) {
-		if (error == ENOSPC)
+		if (error == -ENOSPC)
 			goto out_trans_cancel;
 		goto out_trans_abort;
 	}
@@ -1382,7 +1382,7 @@
 	ASSERT(!S_ISDIR(sip->i_d.di_mode));
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	error = xfs_qm_dqattach(sip, 0);
 	if (error)
@@ -1396,7 +1396,7 @@
 	cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
 	resblks = XFS_LINK_SPACE_RES(mp, target_name->len);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_link, resblks, 0);
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		resblks = 0;
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_link, 0, 0);
 	}
@@ -1417,7 +1417,7 @@
 	 */
 	if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
 		     (xfs_get_projid(tdp) != xfs_get_projid(sip)))) {
-		error = XFS_ERROR(EXDEV);
+		error = -EXDEV;
 		goto error_return;
 	}
 
@@ -1635,8 +1635,8 @@
 		truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
 		if (truncated) {
 			xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE);
-			if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) {
-				error = -filemap_flush(VFS_I(ip)->i_mapping);
+			if (ip->i_delayed_blks > 0) {
+				error = filemap_flush(VFS_I(ip)->i_mapping);
 				if (error)
 					return error;
 			}
@@ -1673,7 +1673,7 @@
 			return 0;
 
 		error = xfs_free_eofblocks(mp, ip, true);
-		if (error && error != EAGAIN)
+		if (error && error != -EAGAIN)
 			return error;
 
 		/* delalloc blocks after truncation means it really is dirty */
@@ -1772,7 +1772,7 @@
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ifree,
 				  XFS_IFREE_SPACE_RES(mp), 0);
 	if (error) {
-		if (error == ENOSPC) {
+		if (error == -ENOSPC) {
 			xfs_warn_ratelimited(mp,
 			"Failed to remove inode(s) from unlinked list. "
 			"Please free space, unmount and run xfs_repair.");
@@ -2219,7 +2219,7 @@
 					XBF_UNMAPPED);
 
 		if (!bp)
-			return ENOMEM;
+			return -ENOMEM;
 
 		/*
 		 * This buffer may not have been correctly initialised as we
@@ -2491,7 +2491,7 @@
 	trace_xfs_remove(dp, name);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	error = xfs_qm_dqattach(dp, 0);
 	if (error)
@@ -2521,12 +2521,12 @@
 	 */
 	resblks = XFS_REMOVE_SPACE_RES(mp);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_remove, resblks, 0);
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		resblks = 0;
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_remove, 0, 0);
 	}
 	if (error) {
-		ASSERT(error != ENOSPC);
+		ASSERT(error != -ENOSPC);
 		cancel_flags = 0;
 		goto out_trans_cancel;
 	}
@@ -2543,11 +2543,11 @@
 	if (is_dir) {
 		ASSERT(ip->i_d.di_nlink >= 2);
 		if (ip->i_d.di_nlink != 2) {
-			error = XFS_ERROR(ENOTEMPTY);
+			error = -ENOTEMPTY;
 			goto out_trans_cancel;
 		}
 		if (!xfs_dir_isempty(ip)) {
-			error = XFS_ERROR(ENOTEMPTY);
+			error = -ENOTEMPTY;
 			goto out_trans_cancel;
 		}
 
@@ -2582,7 +2582,7 @@
 	error = xfs_dir_removename(tp, dp, name, ip->i_ino,
 					&first_block, &free_list, resblks);
 	if (error) {
-		ASSERT(error != ENOENT);
+		ASSERT(error != -ENOENT);
 		goto out_bmap_cancel;
 	}
 
@@ -2702,7 +2702,7 @@
 	cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
 	spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_rename, spaceres, 0);
-	if (error == ENOSPC) {
+	if (error == -ENOSPC) {
 		spaceres = 0;
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_rename, 0, 0);
 	}
@@ -2747,7 +2747,7 @@
 	 */
 	if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
 		     (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) {
-		error = XFS_ERROR(EXDEV);
+		error = -EXDEV;
 		goto error_return;
 	}
 
@@ -2770,7 +2770,7 @@
 		error = xfs_dir_createname(tp, target_dp, target_name,
 						src_ip->i_ino, &first_block,
 						&free_list, spaceres);
-		if (error == ENOSPC)
+		if (error == -ENOSPC)
 			goto error_return;
 		if (error)
 			goto abort_return;
@@ -2795,7 +2795,7 @@
 			 */
 			if (!(xfs_dir_isempty(target_ip)) ||
 			    (target_ip->i_d.di_nlink > 2)) {
-				error = XFS_ERROR(EEXIST);
+				error = -EEXIST;
 				goto error_return;
 			}
 		}
@@ -2847,7 +2847,7 @@
 		error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
 					target_dp->i_ino,
 					&first_block, &free_list, spaceres);
-		ASSERT(error != EEXIST);
+		ASSERT(error != -EEXIST);
 		if (error)
 			goto abort_return;
 	}
@@ -3055,7 +3055,7 @@
 		if (bp->b_iodone) {
 			XFS_BUF_UNDONE(bp);
 			xfs_buf_stale(bp);
-			xfs_buf_ioerror(bp, EIO);
+			xfs_buf_ioerror(bp, -EIO);
 			xfs_buf_ioend(bp, 0);
 		} else {
 			xfs_buf_stale(bp);
@@ -3069,7 +3069,7 @@
 	xfs_iflush_abort(iq, false);
 	kmem_free(ilist);
 	xfs_perag_put(pag);
-	return XFS_ERROR(EFSCORRUPTED);
+	return -EFSCORRUPTED;
 }
 
 /*
@@ -3124,7 +3124,7 @@
 	 * as we wait for an empty AIL as part of the unmount process.
 	 */
 	if (XFS_FORCED_SHUTDOWN(mp)) {
-		error = XFS_ERROR(EIO);
+		error = -EIO;
 		goto abort_out;
 	}
 
@@ -3167,7 +3167,7 @@
 	xfs_buf_relse(bp);
 	xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
 cluster_corrupt_out:
-	error = XFS_ERROR(EFSCORRUPTED);
+	error = -EFSCORRUPTED;
 abort_out:
 	/*
 	 * Unlocks the flush lock
@@ -3331,5 +3331,5 @@
 	return 0;
 
 corrupt_out:
-	return XFS_ERROR(EFSCORRUPTED);
+	return -EFSCORRUPTED;
 }
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index f72bffa..c10e3fa 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -398,4 +398,14 @@
 
 extern struct kmem_zone	*xfs_inode_zone;
 
+/*
+ * Flags for read/write calls
+ */
+#define XFS_IO_ISDIRECT	0x00001		/* bypass page cache */
+#define XFS_IO_INVIS	0x00002		/* don't update inode timestamps */
+
+#define XFS_IO_FLAGS \
+	{ XFS_IO_ISDIRECT,	"DIRECT" }, \
+	{ XFS_IO_INVIS,		"INVIS"}
+
 #endif	/* __XFS_INODE_H__ */
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index a640137..de5a7be 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -788,5 +788,5 @@
 		in_f->ilf_boffset = in_f64->ilf_boffset;
 		return 0;
 	}
-	return EFSCORRUPTED;
+	return -EFSCORRUPTED;
 }
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 8bc1bbc..3799695 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -207,7 +207,7 @@
 	struct path		path;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 
 	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
 	if (IS_ERR(dentry))
@@ -216,7 +216,7 @@
 
 	/* Restrict xfs_open_by_handle to directories & regular files. */
 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
-		error = -XFS_ERROR(EPERM);
+		error = -EPERM;
 		goto out_dput;
 	}
 
@@ -228,18 +228,18 @@
 	fmode = OPEN_FMODE(permflag);
 	if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
 	    (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
-		error = -XFS_ERROR(EPERM);
+		error = -EPERM;
 		goto out_dput;
 	}
 
 	if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
-		error = -XFS_ERROR(EACCES);
+		error = -EACCES;
 		goto out_dput;
 	}
 
 	/* Can't write directories. */
 	if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
-		error = -XFS_ERROR(EISDIR);
+		error = -EISDIR;
 		goto out_dput;
 	}
 
@@ -282,7 +282,7 @@
 	int			error;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 
 	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
 	if (IS_ERR(dentry))
@@ -290,22 +290,22 @@
 
 	/* Restrict this handle operation to symlinks only. */
 	if (!S_ISLNK(dentry->d_inode->i_mode)) {
-		error = -XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_dput;
 	}
 
 	if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
-		error = -XFS_ERROR(EFAULT);
+		error = -EFAULT;
 		goto out_dput;
 	}
 
 	link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 	if (!link) {
-		error = -XFS_ERROR(ENOMEM);
+		error = -ENOMEM;
 		goto out_dput;
 	}
 
-	error = -xfs_readlink(XFS_I(dentry->d_inode), link);
+	error = xfs_readlink(XFS_I(dentry->d_inode), link);
 	if (error)
 		goto out_kfree;
 	error = readlink_copy(hreq->ohandle, olen, link);
@@ -330,10 +330,10 @@
 	int		error;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return XFS_ERROR(EPERM);
+		return -EPERM;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
@@ -364,9 +364,9 @@
 	struct dentry		*dentry;
 
 	if (!capable(CAP_MKNOD))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	error = mnt_want_write_file(parfilp);
 	if (error)
@@ -379,16 +379,16 @@
 	}
 
 	if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
-		error = -XFS_ERROR(EPERM);
+		error = -EPERM;
 		goto out;
 	}
 
 	if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
-		error = -XFS_ERROR(EFAULT);
+		error = -EFAULT;
 		goto out;
 	}
 
-	error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
+	error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
 				 fsd.fsd_dmstate);
 
  out:
@@ -409,18 +409,18 @@
 	char			*kbuf;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	if (al_hreq.buflen < sizeof(struct attrlist) ||
 	    al_hreq.buflen > XATTR_LIST_MAX)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	/*
 	 * Reject flags, only allow namespaces.
 	 */
 	if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
 	if (IS_ERR(dentry))
@@ -431,7 +431,7 @@
 		goto out_dput;
 
 	cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
-	error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
+	error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
 					al_hreq.flags, cursor);
 	if (error)
 		goto out_kfree;
@@ -455,20 +455,20 @@
 	__uint32_t		flags)
 {
 	unsigned char		*kbuf;
-	int			error = EFAULT;
+	int			error = -EFAULT;
 
 	if (*len > XATTR_SIZE_MAX)
-		return EINVAL;
+		return -EINVAL;
 	kbuf = kmem_zalloc_large(*len, KM_SLEEP);
 	if (!kbuf)
-		return ENOMEM;
+		return -ENOMEM;
 
 	error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
 	if (error)
 		goto out_kfree;
 
 	if (copy_to_user(ubuf, kbuf, *len))
-		error = EFAULT;
+		error = -EFAULT;
 
 out_kfree:
 	kmem_free(kbuf);
@@ -484,20 +484,17 @@
 	__uint32_t		flags)
 {
 	unsigned char		*kbuf;
-	int			error = EFAULT;
 
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		return EPERM;
+		return -EPERM;
 	if (len > XATTR_SIZE_MAX)
-		return EINVAL;
+		return -EINVAL;
 
 	kbuf = memdup_user(ubuf, len);
 	if (IS_ERR(kbuf))
 		return PTR_ERR(kbuf);
 
-	error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
-
-	return error;
+	return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
 }
 
 int
@@ -507,7 +504,7 @@
 	__uint32_t		flags)
 {
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		return EPERM;
+		return -EPERM;
 	return xfs_attr_remove(XFS_I(inode), name, flags);
 }
 
@@ -524,9 +521,9 @@
 	unsigned char		*attr_name;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	/* overflow check */
 	if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
@@ -536,18 +533,18 @@
 	if (IS_ERR(dentry))
 		return PTR_ERR(dentry);
 
-	error = E2BIG;
+	error = -E2BIG;
 	size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
 	if (!size || size > 16 * PAGE_SIZE)
 		goto out_dput;
 
 	ops = memdup_user(am_hreq.ops, size);
 	if (IS_ERR(ops)) {
-		error = -PTR_ERR(ops);
+		error = PTR_ERR(ops);
 		goto out_dput;
 	}
 
-	error = ENOMEM;
+	error = -ENOMEM;
 	attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
 	if (!attr_name)
 		goto out_kfree_ops;
@@ -557,7 +554,7 @@
 		ops[i].am_error = strncpy_from_user((char *)attr_name,
 				ops[i].am_attrname, MAXNAMELEN);
 		if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
-			error = ERANGE;
+			error = -ERANGE;
 		if (ops[i].am_error < 0)
 			break;
 
@@ -588,19 +585,19 @@
 			mnt_drop_write_file(parfilp);
 			break;
 		default:
-			ops[i].am_error = EINVAL;
+			ops[i].am_error = -EINVAL;
 		}
 	}
 
 	if (copy_to_user(am_hreq.ops, ops, size))
-		error = XFS_ERROR(EFAULT);
+		error = -EFAULT;
 
 	kfree(attr_name);
  out_kfree_ops:
 	kfree(ops);
  out_dput:
 	dput(dentry);
-	return -error;
+	return error;
 }
 
 int
@@ -625,16 +622,16 @@
 	 */
 	if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
 	    !capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 
 	if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 
 	if (!(filp->f_mode & FMODE_WRITE))
-		return -XFS_ERROR(EBADF);
+		return -EBADF;
 
 	if (!S_ISREG(inode->i_mode))
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	error = mnt_want_write_file(filp);
 	if (error)
@@ -652,7 +649,7 @@
 		bf->l_start += XFS_ISIZE(ip);
 		break;
 	default:
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_unlock;
 	}
 
@@ -669,7 +666,7 @@
 	case XFS_IOC_UNRESVSP:
 	case XFS_IOC_UNRESVSP64:
 		if (bf->l_len <= 0) {
-			error = XFS_ERROR(EINVAL);
+			error = -EINVAL;
 			goto out_unlock;
 		}
 		break;
@@ -682,7 +679,7 @@
 	    bf->l_start > mp->m_super->s_maxbytes ||
 	    bf->l_start + bf->l_len < 0 ||
 	    bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_unlock;
 	}
 
@@ -723,7 +720,7 @@
 		break;
 	default:
 		ASSERT(0);
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 	}
 
 	if (error)
@@ -739,7 +736,7 @@
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 
-	if (!(ioflags & IO_INVIS)) {
+	if (!(ioflags & XFS_IO_INVIS)) {
 		ip->i_d.di_mode &= ~S_ISUID;
 		if (ip->i_d.di_mode & S_IXGRP)
 			ip->i_d.di_mode &= ~S_ISGID;
@@ -759,7 +756,7 @@
 out_unlock:
 	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 	mnt_drop_write_file(filp);
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -781,41 +778,41 @@
 		return -EPERM;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	if ((count = bulkreq.icount) <= 0)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	if (bulkreq.ubuffer == NULL)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	if (cmd == XFS_IOC_FSINUMBERS)
 		error = xfs_inumbers(mp, &inlast, &count,
 					bulkreq.ubuffer, xfs_inumbers_fmt);
 	else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
-		error = xfs_bulkstat_single(mp, &inlast,
-						bulkreq.ubuffer, &done);
+		error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
+					sizeof(xfs_bstat_t), NULL, &done);
 	else	/* XFS_IOC_FSBULKSTAT */
 		error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
 				     sizeof(xfs_bstat_t), bulkreq.ubuffer,
 				     &done);
 
 	if (error)
-		return -error;
+		return error;
 
 	if (bulkreq.ocount != NULL) {
 		if (copy_to_user(bulkreq.lastip, &inlast,
 						sizeof(xfs_ino_t)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 	}
 
 	return 0;
@@ -831,7 +828,7 @@
 
 	error = xfs_fs_geometry(mp, &fsgeo, 3);
 	if (error)
-		return -error;
+		return error;
 
 	/*
 	 * Caller should have passed an argument of type
@@ -839,7 +836,7 @@
 	 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
 	 */
 	if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -853,10 +850,10 @@
 
 	error = xfs_fs_geometry(mp, &fsgeo, 4);
 	if (error)
-		return -error;
+		return error;
 
 	if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -1041,16 +1038,16 @@
 	trace_xfs_ioctl_setattr(ip);
 
 	if (mp->m_flags & XFS_MOUNT_RDONLY)
-		return XFS_ERROR(EROFS);
+		return -EROFS;
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	/*
 	 * Disallow 32bit project ids when projid32bit feature is not enabled.
 	 */
 	if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
 			!xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	/*
 	 * If disk quotas is on, we make sure that the dquots do exist on disk,
@@ -1088,7 +1085,7 @@
 	 * CAP_FSETID capability is applicable.
 	 */
 	if (!inode_owner_or_capable(VFS_I(ip))) {
-		code = XFS_ERROR(EPERM);
+		code = -EPERM;
 		goto error_return;
 	}
 
@@ -1099,7 +1096,7 @@
 	 */
 	if (mask & FSX_PROJID) {
 		if (current_user_ns() != &init_user_ns) {
-			code = XFS_ERROR(EINVAL);
+			code = -EINVAL;
 			goto error_return;
 		}
 
@@ -1122,7 +1119,7 @@
 		if (ip->i_d.di_nextents &&
 		    ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
 		     fa->fsx_extsize)) {
-			code = XFS_ERROR(EINVAL);	/* EFBIG? */
+			code = -EINVAL;	/* EFBIG? */
 			goto error_return;
 		}
 
@@ -1141,7 +1138,7 @@
 
 			extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
 			if (extsize_fsb > MAXEXTLEN) {
-				code = XFS_ERROR(EINVAL);
+				code = -EINVAL;
 				goto error_return;
 			}
 
@@ -1153,13 +1150,13 @@
 			} else {
 				size = mp->m_sb.sb_blocksize;
 				if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
-					code = XFS_ERROR(EINVAL);
+					code = -EINVAL;
 					goto error_return;
 				}
 			}
 
 			if (fa->fsx_extsize % size) {
-				code = XFS_ERROR(EINVAL);
+				code = -EINVAL;
 				goto error_return;
 			}
 		}
@@ -1173,7 +1170,7 @@
 		if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
 		    (XFS_IS_REALTIME_INODE(ip)) !=
 		    (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
-			code = XFS_ERROR(EINVAL);	/* EFBIG? */
+			code = -EINVAL;	/* EFBIG? */
 			goto error_return;
 		}
 
@@ -1184,7 +1181,7 @@
 			if ((mp->m_sb.sb_rblocks == 0) ||
 			    (mp->m_sb.sb_rextsize == 0) ||
 			    (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
-				code = XFS_ERROR(EINVAL);
+				code = -EINVAL;
 				goto error_return;
 			}
 		}
@@ -1198,7 +1195,7 @@
 		     (fa->fsx_xflags &
 				(XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
 		    !capable(CAP_LINUX_IMMUTABLE)) {
-			code = XFS_ERROR(EPERM);
+			code = -EPERM;
 			goto error_return;
 		}
 	}
@@ -1301,7 +1298,7 @@
 		return error;
 	error = xfs_ioctl_setattr(ip, &fa, mask);
 	mnt_drop_write_file(filp);
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -1346,7 +1343,7 @@
 		return error;
 	error = xfs_ioctl_setattr(ip, &fa, mask);
 	mnt_drop_write_file(filp);
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -1356,7 +1353,7 @@
 
 	/* copy only getbmap portion (not getbmapx) */
 	if (copy_to_user(base, bmv, sizeof(struct getbmap)))
-		return XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	*ap += sizeof(struct getbmap);
 	return 0;
@@ -1373,23 +1370,23 @@
 	int			error;
 
 	if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	if (bmx.bmv_count < 2)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
-	if (ioflags & IO_INVIS)
+	if (ioflags & XFS_IO_INVIS)
 		bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
 
 	error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
 			    (struct getbmap *)arg+1);
 	if (error)
-		return -error;
+		return error;
 
 	/* copy back header - only size of getbmap */
 	if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -1399,7 +1396,7 @@
 	struct getbmapx __user	*base = *ap;
 
 	if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
-		return XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	*ap += sizeof(struct getbmapx);
 	return 0;
@@ -1414,22 +1411,22 @@
 	int			error;
 
 	if (copy_from_user(&bmx, arg, sizeof(bmx)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	if (bmx.bmv_count < 2)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	if (bmx.bmv_iflags & (~BMV_IF_VALID))
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
 			    (struct getbmapx *)arg+1);
 	if (error)
-		return -error;
+		return error;
 
 	/* copy back header */
 	if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	return 0;
 }
@@ -1445,33 +1442,33 @@
 	/* Pull information for the target fd */
 	f = fdget((int)sxp->sx_fdtarget);
 	if (!f.file) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out;
 	}
 
 	if (!(f.file->f_mode & FMODE_WRITE) ||
 	    !(f.file->f_mode & FMODE_READ) ||
 	    (f.file->f_flags & O_APPEND)) {
-		error = XFS_ERROR(EBADF);
+		error = -EBADF;
 		goto out_put_file;
 	}
 
 	tmp = fdget((int)sxp->sx_fdtmp);
 	if (!tmp.file) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_put_file;
 	}
 
 	if (!(tmp.file->f_mode & FMODE_WRITE) ||
 	    !(tmp.file->f_mode & FMODE_READ) ||
 	    (tmp.file->f_flags & O_APPEND)) {
-		error = XFS_ERROR(EBADF);
+		error = -EBADF;
 		goto out_put_tmp_file;
 	}
 
 	if (IS_SWAPFILE(file_inode(f.file)) ||
 	    IS_SWAPFILE(file_inode(tmp.file))) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_put_tmp_file;
 	}
 
@@ -1479,17 +1476,17 @@
 	tip = XFS_I(file_inode(tmp.file));
 
 	if (ip->i_mount != tip->i_mount) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_put_tmp_file;
 	}
 
 	if (ip->i_ino == tip->i_ino) {
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto out_put_tmp_file;
 	}
 
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
-		error = XFS_ERROR(EIO);
+		error = -EIO;
 		goto out_put_tmp_file;
 	}
 
@@ -1523,7 +1520,7 @@
 	int			error;
 
 	if (filp->f_mode & FMODE_NOCMTIME)
-		ioflags |= IO_INVIS;
+		ioflags |= XFS_IO_INVIS;
 
 	trace_xfs_file_ioctl(ip);
 
@@ -1542,7 +1539,7 @@
 		xfs_flock64_t		bf;
 
 		if (copy_from_user(&bf, arg, sizeof(bf)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
 	}
 	case XFS_IOC_DIOINFO: {
@@ -1555,7 +1552,7 @@
 		da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
 
 		if (copy_to_user(arg, &da, sizeof(da)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return 0;
 	}
 
@@ -1588,7 +1585,7 @@
 		struct fsdmidata	dmi;
 
 		if (copy_from_user(&dmi, arg, sizeof(dmi)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = mnt_want_write_file(filp);
 		if (error)
@@ -1597,7 +1594,7 @@
 		error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
 				dmi.fsd_dmstate);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 
 	case XFS_IOC_GETBMAP:
@@ -1613,14 +1610,14 @@
 		xfs_fsop_handlereq_t	hreq;
 
 		if (copy_from_user(&hreq, arg, sizeof(hreq)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_find_handle(cmd, &hreq);
 	}
 	case XFS_IOC_OPEN_BY_HANDLE: {
 		xfs_fsop_handlereq_t	hreq;
 
 		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_open_by_handle(filp, &hreq);
 	}
 	case XFS_IOC_FSSETDM_BY_HANDLE:
@@ -1630,7 +1627,7 @@
 		xfs_fsop_handlereq_t	hreq;
 
 		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_readlink_by_handle(filp, &hreq);
 	}
 	case XFS_IOC_ATTRLIST_BY_HANDLE:
@@ -1643,13 +1640,13 @@
 		struct xfs_swapext	sxp;
 
 		if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_ioc_swapext(&sxp);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 
 	case XFS_IOC_FSCOUNTS: {
@@ -1657,10 +1654,10 @@
 
 		error = xfs_fs_counts(mp, &out);
 		if (error)
-			return -error;
+			return error;
 
 		if (copy_to_user(arg, &out, sizeof(out)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return 0;
 	}
 
@@ -1672,10 +1669,10 @@
 			return -EPERM;
 
 		if (mp->m_flags & XFS_MOUNT_RDONLY)
-			return -XFS_ERROR(EROFS);
+			return -EROFS;
 
 		if (copy_from_user(&inout, arg, sizeof(inout)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = mnt_want_write_file(filp);
 		if (error)
@@ -1686,10 +1683,10 @@
 		error = xfs_reserve_blocks(mp, &in, &inout);
 		mnt_drop_write_file(filp);
 		if (error)
-			return -error;
+			return error;
 
 		if (copy_to_user(arg, &inout, sizeof(inout)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return 0;
 	}
 
@@ -1701,10 +1698,10 @@
 
 		error = xfs_reserve_blocks(mp, NULL, &out);
 		if (error)
-			return -error;
+			return error;
 
 		if (copy_to_user(arg, &out, sizeof(out)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		return 0;
 	}
@@ -1713,42 +1710,42 @@
 		xfs_growfs_data_t in;
 
 		if (copy_from_user(&in, arg, sizeof(in)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_growfs_data(mp, &in);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 
 	case XFS_IOC_FSGROWFSLOG: {
 		xfs_growfs_log_t in;
 
 		if (copy_from_user(&in, arg, sizeof(in)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_growfs_log(mp, &in);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 
 	case XFS_IOC_FSGROWFSRT: {
 		xfs_growfs_rt_t in;
 
 		if (copy_from_user(&in, arg, sizeof(in)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_growfs_rt(mp, &in);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 
 	case XFS_IOC_GOINGDOWN: {
@@ -1758,10 +1755,9 @@
 			return -EPERM;
 
 		if (get_user(in, (__uint32_t __user *)arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
-		error = xfs_fs_goingdown(mp, in);
-		return -error;
+		return xfs_fs_goingdown(mp, in);
 	}
 
 	case XFS_IOC_ERROR_INJECTION: {
@@ -1771,18 +1767,16 @@
 			return -EPERM;
 
 		if (copy_from_user(&in, arg, sizeof(in)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
-		error = xfs_errortag_add(in.errtag, mp);
-		return -error;
+		return xfs_errortag_add(in.errtag, mp);
 	}
 
 	case XFS_IOC_ERROR_CLEARALL:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
 
-		error = xfs_errortag_clearall(mp, 1);
-		return -error;
+		return xfs_errortag_clearall(mp, 1);
 
 	case XFS_IOC_FREE_EOFBLOCKS: {
 		struct xfs_fs_eofblocks eofb;
@@ -1792,16 +1786,16 @@
 			return -EPERM;
 
 		if (mp->m_flags & XFS_MOUNT_RDONLY)
-			return -XFS_ERROR(EROFS);
+			return -EROFS;
 
 		if (copy_from_user(&eofb, arg, sizeof(eofb)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
 		if (error)
-			return -error;
+			return error;
 
-		return -xfs_icache_free_eofblocks(mp, &keofb);
+		return xfs_icache_free_eofblocks(mp, &keofb);
 	}
 
 	default:
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 944d5ba..a554646 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -28,7 +28,6 @@
 #include "xfs_sb.h"
 #include "xfs_ag.h"
 #include "xfs_mount.h"
-#include "xfs_vnode.h"
 #include "xfs_inode.h"
 #include "xfs_itable.h"
 #include "xfs_error.h"
@@ -56,7 +55,7 @@
 	    get_user(bf->l_sysid,	&arg32->l_sysid) ||
 	    get_user(bf->l_pid,		&arg32->l_pid) ||
 	    copy_from_user(bf->l_pad,	&arg32->l_pad,	4*sizeof(u32)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -70,10 +69,10 @@
 
 	error = xfs_fs_geometry(mp, &fsgeo, 3);
 	if (error)
-		return -error;
+		return error;
 	/* The 32-bit variant simply has some padding at the end */
 	if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -84,7 +83,7 @@
 {
 	if (get_user(in->newblocks, &arg32->newblocks) ||
 	    get_user(in->imaxpct,   &arg32->imaxpct))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -95,14 +94,14 @@
 {
 	if (get_user(in->newblocks, &arg32->newblocks) ||
 	    get_user(in->extsize,   &arg32->extsize))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
 STATIC int
 xfs_inumbers_fmt_compat(
 	void			__user *ubuffer,
-	const xfs_inogrp_t	*buffer,
+	const struct xfs_inogrp	*buffer,
 	long			count,
 	long			*written)
 {
@@ -113,7 +112,7 @@
 		if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
 		    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
 		    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 	}
 	*written = count * sizeof(*p32);
 	return 0;
@@ -132,7 +131,7 @@
 
 	if (get_user(sec32,		&bstime32->tv_sec)	||
 	    get_user(bstime->tv_nsec,	&bstime32->tv_nsec))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	bstime->tv_sec = sec32;
 	return 0;
 }
@@ -164,7 +163,7 @@
 	    get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask)	||
 	    get_user(bstat->bs_dmstate,	&bstat32->bs_dmstate)	||
 	    get_user(bstat->bs_aextents, &bstat32->bs_aextents))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -180,7 +179,7 @@
 	sec32 = p->tv_sec;
 	if (put_user(sec32, &p32->tv_sec) ||
 	    put_user(p->tv_nsec, &p32->tv_nsec))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	return 0;
 }
 
@@ -195,7 +194,7 @@
 	compat_xfs_bstat_t	__user *p32 = ubuffer;
 
 	if (ubsize < sizeof(*p32))
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 
 	if (put_user(buffer->bs_ino,	  &p32->bs_ino)		||
 	    put_user(buffer->bs_mode,	  &p32->bs_mode)	||
@@ -218,7 +217,7 @@
 	    put_user(buffer->bs_dmevmask, &p32->bs_dmevmask)	||
 	    put_user(buffer->bs_dmstate,  &p32->bs_dmstate)	||
 	    put_user(buffer->bs_aextents, &p32->bs_aextents))
-		return XFS_ERROR(EFAULT);
+		return -EFAULT;
 	if (ubused)
 		*ubused = sizeof(*p32);
 	return 0;
@@ -256,30 +255,30 @@
 	/* should be called again (unused here, but used in dmapi) */
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	if (get_user(addr, &p32->lastip))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	bulkreq.lastip = compat_ptr(addr);
 	if (get_user(bulkreq.icount, &p32->icount) ||
 	    get_user(addr, &p32->ubuffer))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	bulkreq.ubuffer = compat_ptr(addr);
 	if (get_user(addr, &p32->ocount))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	bulkreq.ocount = compat_ptr(addr);
 
 	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	if ((count = bulkreq.icount) <= 0)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	if (bulkreq.ubuffer == NULL)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	if (cmd == XFS_IOC_FSINUMBERS_32) {
 		error = xfs_inumbers(mp, &inlast, &count,
@@ -294,17 +293,17 @@
 			xfs_bulkstat_one_compat, sizeof(compat_xfs_bstat_t),
 			bulkreq.ubuffer, &done);
 	} else
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 	if (error)
-		return -error;
+		return error;
 
 	if (bulkreq.ocount != NULL) {
 		if (copy_to_user(bulkreq.lastip, &inlast,
 						sizeof(xfs_ino_t)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 
 		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 	}
 
 	return 0;
@@ -318,7 +317,7 @@
 	compat_xfs_fsop_handlereq_t	hreq32;
 
 	if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	hreq->fd = hreq32.fd;
 	hreq->path = compat_ptr(hreq32.path);
@@ -352,19 +351,19 @@
 	char			*kbuf;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&al_hreq, arg,
 			   sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 	if (al_hreq.buflen < sizeof(struct attrlist) ||
 	    al_hreq.buflen > XATTR_LIST_MAX)
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	/*
 	 * Reject flags, only allow namespaces.
 	 */
 	if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
-		return -XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
 	if (IS_ERR(dentry))
@@ -376,7 +375,7 @@
 		goto out_dput;
 
 	cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
-	error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
+	error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
 					al_hreq.flags, cursor);
 	if (error)
 		goto out_kfree;
@@ -404,10 +403,10 @@
 	unsigned char				*attr_name;
 
 	if (!capable(CAP_SYS_ADMIN))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&am_hreq, arg,
 			   sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	/* overflow check */
 	if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
@@ -417,7 +416,7 @@
 	if (IS_ERR(dentry))
 		return PTR_ERR(dentry);
 
-	error = E2BIG;
+	error = -E2BIG;
 	size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
 	if (!size || size > 16 * PAGE_SIZE)
 		goto out_dput;
@@ -428,7 +427,7 @@
 		goto out_dput;
 	}
 
-	error = ENOMEM;
+	error = -ENOMEM;
 	attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
 	if (!attr_name)
 		goto out_kfree_ops;
@@ -439,7 +438,7 @@
 				compat_ptr(ops[i].am_attrname),
 				MAXNAMELEN);
 		if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
-			error = ERANGE;
+			error = -ERANGE;
 		if (ops[i].am_error < 0)
 			break;
 
@@ -470,19 +469,19 @@
 			mnt_drop_write_file(parfilp);
 			break;
 		default:
-			ops[i].am_error = EINVAL;
+			ops[i].am_error = -EINVAL;
 		}
 	}
 
 	if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
-		error = XFS_ERROR(EFAULT);
+		error = -EFAULT;
 
 	kfree(attr_name);
  out_kfree_ops:
 	kfree(ops);
  out_dput:
 	dput(dentry);
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -496,26 +495,26 @@
 	struct dentry		*dentry;
 
 	if (!capable(CAP_MKNOD))
-		return -XFS_ERROR(EPERM);
+		return -EPERM;
 	if (copy_from_user(&dmhreq, arg,
 			   sizeof(compat_xfs_fsop_setdm_handlereq_t)))
-		return -XFS_ERROR(EFAULT);
+		return -EFAULT;
 
 	dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
 	if (IS_ERR(dentry))
 		return PTR_ERR(dentry);
 
 	if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
-		error = -XFS_ERROR(EPERM);
+		error = -EPERM;
 		goto out;
 	}
 
 	if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
-		error = -XFS_ERROR(EFAULT);
+		error = -EFAULT;
 		goto out;
 	}
 
-	error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
+	error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
 				 fsd.fsd_dmstate);
 
 out:
@@ -537,7 +536,7 @@
 	int			error;
 
 	if (filp->f_mode & FMODE_NOCMTIME)
-		ioflags |= IO_INVIS;
+		ioflags |= XFS_IO_INVIS;
 
 	trace_xfs_file_compat_ioctl(ip);
 
@@ -588,7 +587,7 @@
 		struct xfs_flock64	bf;
 
 		if (xfs_compat_flock64_copyin(&bf, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 		return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
 	}
@@ -598,25 +597,25 @@
 		struct xfs_growfs_data	in;
 
 		if (xfs_compat_growfs_data_copyin(&in, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_growfs_data(mp, &in);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 	case XFS_IOC_FSGROWFSRT_32: {
 		struct xfs_growfs_rt	in;
 
 		if (xfs_compat_growfs_rt_copyin(&in, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_growfs_rt(mp, &in);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 #endif
 	/* long changes size, but xfs only copiese out 32 bits */
@@ -633,13 +632,13 @@
 		if (copy_from_user(&sxp, sxu,
 				   offsetof(struct xfs_swapext, sx_stat)) ||
 		    xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		error = mnt_want_write_file(filp);
 		if (error)
 			return error;
 		error = xfs_ioc_swapext(&sxp);
 		mnt_drop_write_file(filp);
-		return -error;
+		return error;
 	}
 	case XFS_IOC_FSBULKSTAT_32:
 	case XFS_IOC_FSBULKSTAT_SINGLE_32:
@@ -651,7 +650,7 @@
 		struct xfs_fsop_handlereq	hreq;
 
 		if (xfs_compat_handlereq_copyin(&hreq, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
 		return xfs_find_handle(cmd, &hreq);
 	}
@@ -659,14 +658,14 @@
 		struct xfs_fsop_handlereq	hreq;
 
 		if (xfs_compat_handlereq_copyin(&hreq, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_open_by_handle(filp, &hreq);
 	}
 	case XFS_IOC_READLINK_BY_HANDLE_32: {
 		struct xfs_fsop_handlereq	hreq;
 
 		if (xfs_compat_handlereq_copyin(&hreq, arg))
-			return -XFS_ERROR(EFAULT);
+			return -EFAULT;
 		return xfs_readlink_by_handle(filp, &hreq);
 	}
 	case XFS_IOC_ATTRLIST_BY_HANDLE_32:
@@ -676,6 +675,6 @@
 	case XFS_IOC_FSSETDM_BY_HANDLE_32:
 		return xfs_compat_fssetdm_by_handle(filp, arg);
 	default:
-		return -XFS_ERROR(ENOIOCTLCMD);
+		return -ENOIOCTLCMD;
 	}
 }
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 6d3ec2b..e9c47b6 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -110,7 +110,7 @@
 		(unsigned long long)imap->br_startoff,
 		(unsigned long long)imap->br_blockcount,
 		imap->br_state);
-	return EFSCORRUPTED;
+	return -EFSCORRUPTED;
 }
 
 int
@@ -138,7 +138,7 @@
 
 	error = xfs_qm_dqattach(ip, 0);
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	rt = XFS_IS_REALTIME_INODE(ip);
 	extsz = xfs_get_extsz_hint(ip);
@@ -148,7 +148,7 @@
 	if ((offset + count) > XFS_ISIZE(ip)) {
 		error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb);
 		if (error)
-			return XFS_ERROR(error);
+			return error;
 	} else {
 		if (nmaps && (imap->br_startblock == HOLESTARTBLOCK))
 			last_fsb = MIN(last_fsb, (xfs_fileoff_t)
@@ -188,7 +188,7 @@
 	 */
 	if (error) {
 		xfs_trans_cancel(tp, 0);
-		return XFS_ERROR(error);
+		return error;
 	}
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
@@ -225,7 +225,7 @@
 	 * Copy any maps to caller's array and return any error.
 	 */
 	if (nimaps == 0) {
-		error = XFS_ERROR(ENOSPC);
+		error = -ENOSPC;
 		goto out_unlock;
 	}
 
@@ -397,7 +397,8 @@
 	struct xfs_inode *ip,
 	int type,
 	xfs_fsblock_t *qblocks,
-	int *qshift)
+	int *qshift,
+	int64_t	*qfreesp)
 {
 	int64_t freesp;
 	int shift = 0;
@@ -406,6 +407,7 @@
 	/* over hi wmark, squash the prealloc completely */
 	if (dq->q_res_bcount >= dq->q_prealloc_hi_wmark) {
 		*qblocks = 0;
+		*qfreesp = 0;
 		return;
 	}
 
@@ -418,6 +420,9 @@
 			shift += 2;
 	}
 
+	if (freesp < *qfreesp)
+		*qfreesp = freesp;
+
 	/* only overwrite the throttle values if we are more aggressive */
 	if ((freesp >> shift) < (*qblocks >> *qshift)) {
 		*qblocks = freesp;
@@ -476,15 +481,18 @@
 	}
 
 	/*
-	 * Check each quota to cap the prealloc size and provide a shift
-	 * value to throttle with.
+	 * Check each quota to cap the prealloc size, provide a shift value to
+	 * throttle with and adjust amount of available space.
 	 */
 	if (xfs_quota_need_throttle(ip, XFS_DQ_USER, alloc_blocks))
-		xfs_quota_calc_throttle(ip, XFS_DQ_USER, &qblocks, &qshift);
+		xfs_quota_calc_throttle(ip, XFS_DQ_USER, &qblocks, &qshift,
+					&freesp);
 	if (xfs_quota_need_throttle(ip, XFS_DQ_GROUP, alloc_blocks))
-		xfs_quota_calc_throttle(ip, XFS_DQ_GROUP, &qblocks, &qshift);
+		xfs_quota_calc_throttle(ip, XFS_DQ_GROUP, &qblocks, &qshift,
+					&freesp);
 	if (xfs_quota_need_throttle(ip, XFS_DQ_PROJ, alloc_blocks))
-		xfs_quota_calc_throttle(ip, XFS_DQ_PROJ, &qblocks, &qshift);
+		xfs_quota_calc_throttle(ip, XFS_DQ_PROJ, &qblocks, &qshift,
+					&freesp);
 
 	/*
 	 * The final prealloc size is set to the minimum of free space available
@@ -552,7 +560,7 @@
 	 */
 	error = xfs_qm_dqattach_locked(ip, 0);
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	extsz = xfs_get_extsz_hint(ip);
 	offset_fsb = XFS_B_TO_FSBT(mp, offset);
@@ -596,11 +604,11 @@
 				imap, &nimaps, XFS_BMAPI_ENTIRE);
 	switch (error) {
 	case 0:
-	case ENOSPC:
-	case EDQUOT:
+	case -ENOSPC:
+	case -EDQUOT:
 		break;
 	default:
-		return XFS_ERROR(error);
+		return error;
 	}
 
 	/*
@@ -614,7 +622,7 @@
 			error = 0;
 			goto retry;
 		}
-		return XFS_ERROR(error ? error : ENOSPC);
+		return error ? error : -ENOSPC;
 	}
 
 	if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip)))
@@ -663,7 +671,7 @@
 	 */
 	error = xfs_qm_dqattach(ip, 0);
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	count_fsb = imap->br_blockcount;
@@ -690,7 +698,7 @@
 						  nres, 0);
 			if (error) {
 				xfs_trans_cancel(tp, 0);
-				return XFS_ERROR(error);
+				return error;
 			}
 			xfs_ilock(ip, XFS_ILOCK_EXCL);
 			xfs_trans_ijoin(tp, ip, 0);
@@ -739,7 +747,7 @@
 			if ((map_start_fsb + count_fsb) > last_block) {
 				count_fsb = last_block - map_start_fsb;
 				if (count_fsb == 0) {
-					error = EAGAIN;
+					error = -EAGAIN;
 					goto trans_cancel;
 				}
 			}
@@ -793,7 +801,7 @@
 	xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
 error0:
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
-	return XFS_ERROR(error);
+	return error;
 }
 
 int
@@ -853,7 +861,7 @@
 					  resblks, 0);
 		if (error) {
 			xfs_trans_cancel(tp, 0);
-			return XFS_ERROR(error);
+			return error;
 		}
 
 		xfs_ilock(ip, XFS_ILOCK_EXCL);
@@ -892,7 +900,7 @@
 		error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 		if (error)
-			return XFS_ERROR(error);
+			return error;
 
 		if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))
 			return xfs_alert_fsblock_zero(ip, &imap);
@@ -915,5 +923,5 @@
 	xfs_bmap_cancel(&free_list);
 	xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT));
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
-	return XFS_ERROR(error);
+	return error;
 }
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 205613a..7212949 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -72,7 +72,7 @@
 	int			error = 0;
 
 	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
-		error = -xfs_attr_set(ip, xattr->name, xattr->value,
+		error = xfs_attr_set(ip, xattr->name, xattr->value,
 				      xattr->value_len, ATTR_SECURE);
 		if (error < 0)
 			break;
@@ -93,7 +93,7 @@
 	struct inode	*dir,
 	const struct qstr *qstr)
 {
-	return -security_inode_init_security(inode, dir, qstr,
+	return security_inode_init_security(inode, dir, qstr,
 					     &xfs_initxattrs, NULL);
 }
 
@@ -173,12 +173,12 @@
 
 #ifdef CONFIG_XFS_POSIX_ACL
 	if (default_acl) {
-		error = -xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+		error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
 		if (error)
 			goto out_cleanup_inode;
 	}
 	if (acl) {
-		error = -xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
+		error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
 		if (error)
 			goto out_cleanup_inode;
 	}
@@ -194,7 +194,7 @@
 		posix_acl_release(default_acl);
 	if (acl)
 		posix_acl_release(acl);
-	return -error;
+	return error;
 
  out_cleanup_inode:
 	if (!tmpfile)
@@ -248,8 +248,8 @@
 	xfs_dentry_to_name(&name, dentry, 0);
 	error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
 	if (unlikely(error)) {
-		if (unlikely(error != ENOENT))
-			return ERR_PTR(-error);
+		if (unlikely(error != -ENOENT))
+			return ERR_PTR(error);
 		d_add(dentry, NULL);
 		return NULL;
 	}
@@ -275,8 +275,8 @@
 	xfs_dentry_to_name(&xname, dentry, 0);
 	error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
 	if (unlikely(error)) {
-		if (unlikely(error != ENOENT))
-			return ERR_PTR(-error);
+		if (unlikely(error != -ENOENT))
+			return ERR_PTR(error);
 		/*
 		 * call d_add(dentry, NULL) here when d_drop_negative_children
 		 * is called in xfs_vn_mknod (ie. allow negative dentries
@@ -311,7 +311,7 @@
 
 	error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
 	if (unlikely(error))
-		return -error;
+		return error;
 
 	ihold(inode);
 	d_instantiate(dentry, inode);
@@ -328,7 +328,7 @@
 
 	xfs_dentry_to_name(&name, dentry, 0);
 
-	error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
+	error = xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
 	if (error)
 		return error;
 
@@ -375,7 +375,7 @@
 	xfs_cleanup_inode(dir, inode, dentry);
 	iput(inode);
  out:
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -392,8 +392,8 @@
 	xfs_dentry_to_name(&oname, odentry, 0);
 	xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode);
 
-	return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
-			   XFS_I(ndir), &nname, new_inode ?
+	return xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
+			  XFS_I(ndir), &nname, new_inode ?
 						XFS_I(new_inode) : NULL);
 }
 
@@ -414,7 +414,7 @@
 	if (!link)
 		goto out_err;
 
-	error = -xfs_readlink(XFS_I(dentry->d_inode), link);
+	error = xfs_readlink(XFS_I(dentry->d_inode), link);
 	if (unlikely(error))
 		goto out_kfree;
 
@@ -441,7 +441,7 @@
 	trace_xfs_getattr(ip);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return -XFS_ERROR(EIO);
+		return -EIO;
 
 	stat->size = XFS_ISIZE(ip);
 	stat->dev = inode->i_sb->s_dev;
@@ -546,14 +546,14 @@
 	/* If acls are being inherited, we already have this checked */
 	if (!(flags & XFS_ATTR_NOACL)) {
 		if (mp->m_flags & XFS_MOUNT_RDONLY)
-			return XFS_ERROR(EROFS);
+			return -EROFS;
 
 		if (XFS_FORCED_SHUTDOWN(mp))
-			return XFS_ERROR(EIO);
+			return -EIO;
 
-		error = -inode_change_ok(inode, iattr);
+		error = inode_change_ok(inode, iattr);
 		if (error)
-			return XFS_ERROR(error);
+			return error;
 	}
 
 	ASSERT((mask & ATTR_SIZE) == 0);
@@ -703,7 +703,7 @@
 	xfs_qm_dqrele(gdqp);
 
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	/*
 	 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
@@ -713,9 +713,9 @@
 	 * 	     Posix ACL code seems to care about this issue either.
 	 */
 	if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
-		error = -posix_acl_chmod(inode, inode->i_mode);
+		error = posix_acl_chmod(inode, inode->i_mode);
 		if (error)
-			return XFS_ERROR(error);
+			return error;
 	}
 
 	return 0;
@@ -748,14 +748,14 @@
 	trace_xfs_setattr(ip);
 
 	if (mp->m_flags & XFS_MOUNT_RDONLY)
-		return XFS_ERROR(EROFS);
+		return -EROFS;
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
-	error = -inode_change_ok(inode, iattr);
+	error = inode_change_ok(inode, iattr);
 	if (error)
-		return XFS_ERROR(error);
+		return error;
 
 	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
 	ASSERT(S_ISREG(ip->i_d.di_mode));
@@ -818,7 +818,7 @@
 	 * care about here.
 	 */
 	if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
-		error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+		error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
 						      ip->i_d.di_size, newsize);
 		if (error)
 			return error;
@@ -844,7 +844,7 @@
 	 * much we can do about this, except to hope that the caller sees ENOMEM
 	 * and retries the truncate operation.
 	 */
-	error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
+	error = block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
 	if (error)
 		return error;
 	truncate_setsize(inode, newsize);
@@ -950,7 +950,7 @@
 		error = xfs_setattr_nonsize(ip, iattr, 0);
 	}
 
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -970,7 +970,7 @@
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0);
 	if (error) {
 		xfs_trans_cancel(tp, 0);
-		return -error;
+		return error;
 	}
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
@@ -991,7 +991,7 @@
 	}
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
-	return -xfs_trans_commit(tp, 0);
+	return xfs_trans_commit(tp, 0);
 }
 
 #define XFS_FIEMAP_FLAGS	(FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
@@ -1036,7 +1036,7 @@
 		*full = 1;	/* user array now full */
 	}
 
-	return -error;
+	return error;
 }
 
 STATIC int
@@ -1055,12 +1055,12 @@
 		return error;
 
 	/* Set up bmap header for xfs internal routine */
-	bm.bmv_offset = BTOBB(start);
+	bm.bmv_offset = BTOBBT(start);
 	/* Special case for whole file */
 	if (length == FIEMAP_MAX_OFFSET)
 		bm.bmv_length = -1LL;
 	else
-		bm.bmv_length = BTOBB(length);
+		bm.bmv_length = BTOBB(start + length) - bm.bmv_offset;
 
 	/* We add one because in getbmap world count includes the header */
 	bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
@@ -1075,7 +1075,7 @@
 
 	error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
 	if (error)
-		return -error;
+		return error;
 
 	return 0;
 }
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index cb64f22..f71be9c 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -67,19 +67,17 @@
 	*stat = BULKSTAT_RV_NOTHING;
 
 	if (!buffer || xfs_internal_inum(mp, ino))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 
 	buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
 	if (!buf)
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 
 	error = xfs_iget(mp, NULL, ino,
 			 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
 			 XFS_ILOCK_SHARED, &ip);
-	if (error) {
-		*stat = BULKSTAT_RV_NOTHING;
+	if (error)
 		goto out_free;
-	}
 
 	ASSERT(ip != NULL);
 	ASSERT(ip->i_imap.im_blkno != 0);
@@ -136,7 +134,6 @@
 	IRELE(ip);
 
 	error = formatter(buffer, ubsize, ubused, buf);
-
 	if (!error)
 		*stat = BULKSTAT_RV_DIDONE;
 
@@ -154,9 +151,9 @@
 	const xfs_bstat_t	*buffer)
 {
 	if (ubsize < sizeof(*buffer))
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 	if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
-		return XFS_ERROR(EFAULT);
+		return -EFAULT;
 	if (ubused)
 		*ubused = sizeof(*buffer);
 	return 0;
@@ -175,9 +172,170 @@
 				    xfs_bulkstat_one_fmt, ubused, stat);
 }
 
+/*
+ * Loop over all clusters in a chunk for a given incore inode allocation btree
+ * record.  Do a readahead if there are any allocated inodes in that cluster.
+ */
+STATIC void
+xfs_bulkstat_ichunk_ra(
+	struct xfs_mount		*mp,
+	xfs_agnumber_t			agno,
+	struct xfs_inobt_rec_incore	*irec)
+{
+	xfs_agblock_t			agbno;
+	struct blk_plug			plug;
+	int				blks_per_cluster;
+	int				inodes_per_cluster;
+	int				i;	/* inode chunk index */
+
+	agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
+	blks_per_cluster = xfs_icluster_size_fsb(mp);
+	inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
+
+	blk_start_plug(&plug);
+	for (i = 0; i < XFS_INODES_PER_CHUNK;
+	     i += inodes_per_cluster, agbno += blks_per_cluster) {
+		if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
+			xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
+					     &xfs_inode_buf_ops);
+		}
+	}
+	blk_finish_plug(&plug);
+}
+
+/*
+ * Lookup the inode chunk that the given inode lives in and then get the record
+ * if we found the chunk.  If the inode was not the last in the chunk and there
+ * are some left allocated, update the data for the pointed-to record as well as
+ * return the count of grabbed inodes.
+ */
+STATIC int
+xfs_bulkstat_grab_ichunk(
+	struct xfs_btree_cur		*cur,	/* btree cursor */
+	xfs_agino_t			agino,	/* starting inode of chunk */
+	int				*icount,/* return # of inodes grabbed */
+	struct xfs_inobt_rec_incore	*irec)	/* btree record */
+{
+	int				idx;	/* index into inode chunk */
+	int				stat;
+	int				error = 0;
+
+	/* Lookup the inode chunk that this inode lives in */
+	error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
+	if (error)
+		return error;
+	if (!stat) {
+		*icount = 0;
+		return error;
+	}
+
+	/* Get the record, should always work */
+	error = xfs_inobt_get_rec(cur, irec, &stat);
+	if (error)
+		return error;
+	XFS_WANT_CORRUPTED_RETURN(stat == 1);
+
+	/* Check if the record contains the inode in request */
+	if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino)
+		return -EINVAL;
+
+	idx = agino - irec->ir_startino + 1;
+	if (idx < XFS_INODES_PER_CHUNK &&
+	    (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
+		int	i;
+
+		/* We got a right chunk with some left inodes allocated at it.
+		 * Grab the chunk record.  Mark all the uninteresting inodes
+		 * free -- because they're before our start point.
+		 */
+		for (i = 0; i < idx; i++) {
+			if (XFS_INOBT_MASK(i) & ~irec->ir_free)
+				irec->ir_freecount++;
+		}
+
+		irec->ir_free |= xfs_inobt_maskn(0, idx);
+		*icount = XFS_INODES_PER_CHUNK - irec->ir_freecount;
+	}
+
+	return 0;
+}
+
 #define XFS_BULKSTAT_UBLEFT(ubleft)	((ubleft) >= statstruct_size)
 
 /*
+ * Process inodes in chunk with a pointer to a formatter function
+ * that will iget the inode and fill in the appropriate structure.
+ */
+int
+xfs_bulkstat_ag_ichunk(
+	struct xfs_mount		*mp,
+	xfs_agnumber_t			agno,
+	struct xfs_inobt_rec_incore	*irbp,
+	bulkstat_one_pf			formatter,
+	size_t				statstruct_size,
+	struct xfs_bulkstat_agichunk	*acp)
+{
+	xfs_ino_t			lastino = acp->ac_lastino;
+	char				__user **ubufp = acp->ac_ubuffer;
+	int				ubleft = acp->ac_ubleft;
+	int				ubelem = acp->ac_ubelem;
+	int				chunkidx, clustidx;
+	int				error = 0;
+	xfs_agino_t			agino;
+
+	for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
+	     XFS_BULKSTAT_UBLEFT(ubleft) &&
+	     irbp->ir_freecount < XFS_INODES_PER_CHUNK;
+	     chunkidx++, clustidx++, agino++) {
+		int		fmterror;	/* bulkstat formatter result */
+		int		ubused;
+		xfs_ino_t	ino = XFS_AGINO_TO_INO(mp, agno, agino);
+
+		ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
+
+		/* Skip if this inode is free */
+		if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
+			lastino = ino;
+			continue;
+		}
+
+		/*
+		 * Count used inodes as free so we can tell when the
+		 * chunk is used up.
+		 */
+		irbp->ir_freecount++;
+
+		/* Get the inode and fill in a single buffer */
+		ubused = statstruct_size;
+		error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror);
+		if (fmterror == BULKSTAT_RV_NOTHING) {
+			if (error && error != -ENOENT && error != -EINVAL) {
+				ubleft = 0;
+				break;
+			}
+			lastino = ino;
+			continue;
+		}
+		if (fmterror == BULKSTAT_RV_GIVEUP) {
+			ubleft = 0;
+			ASSERT(error);
+			break;
+		}
+		if (*ubufp)
+			*ubufp += ubused;
+		ubleft -= ubused;
+		ubelem++;
+		lastino = ino;
+	}
+
+	acp->ac_lastino = lastino;
+	acp->ac_ubleft = ubleft;
+	acp->ac_ubelem = ubelem;
+
+	return error;
+}
+
+/*
  * Return stat information in bulk (by-inode) for the filesystem.
  */
 int					/* error status */
@@ -190,13 +348,10 @@
 	char			__user *ubuffer, /* buffer with inode stats */
 	int			*done)	/* 1 if there are more stats to get */
 {
-	xfs_agblock_t		agbno=0;/* allocation group block number */
 	xfs_buf_t		*agbp;	/* agi header buffer */
 	xfs_agi_t		*agi;	/* agi header data */
 	xfs_agino_t		agino;	/* inode # in allocation group */
 	xfs_agnumber_t		agno;	/* allocation group number */
-	int			chunkidx; /* current index into inode chunk */
-	int			clustidx; /* current index into inode cluster */
 	xfs_btree_cur_t		*cur;	/* btree cursor for ialloc btree */
 	int			end_of_ag; /* set if we've seen the ag end */
 	int			error;	/* error code */
@@ -209,8 +364,6 @@
 	xfs_inobt_rec_incore_t	*irbuf;	/* start of irec buffer */
 	xfs_inobt_rec_incore_t	*irbufend; /* end of good irec buffer entries */
 	xfs_ino_t		lastino; /* last inode number returned */
-	int			blks_per_cluster; /* # of blocks per cluster */
-	int			inodes_per_cluster;/* # of inodes per cluster */
 	int			nirbuf;	/* size of irbuf */
 	int			rval;	/* return value error code */
 	int			tmp;	/* result value from btree calls */
@@ -218,7 +371,6 @@
 	int			ubleft;	/* bytes left in user's buffer */
 	char			__user *ubufp;	/* pointer into user's buffer */
 	int			ubelem;	/* spaces used in user's buffer */
-	int			ubused;	/* bytes used by formatter */
 
 	/*
 	 * Get the last inode value, see if there's nothing to do.
@@ -233,20 +385,16 @@
 		*ubcountp = 0;
 		return 0;
 	}
-	if (!ubcountp || *ubcountp <= 0) {
-		return EINVAL;
-	}
+
 	ubcount = *ubcountp; /* statstruct's */
 	ubleft = ubcount * statstruct_size; /* bytes */
 	*ubcountp = ubelem = 0;
 	*done = 0;
 	fmterror = 0;
 	ubufp = ubuffer;
-	blks_per_cluster = xfs_icluster_size_fsb(mp);
-	inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
 	irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
 	if (!irbuf)
-		return ENOMEM;
+		return -ENOMEM;
 
 	nirbuf = irbsize / sizeof(*irbuf);
 
@@ -258,14 +406,8 @@
 	while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
 		cond_resched();
 		error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-		if (error) {
-			/*
-			 * Skip this allocation group and go to the next one.
-			 */
-			agno++;
-			agino = 0;
-			continue;
-		}
+		if (error)
+			break;
 		agi = XFS_BUF_TO_AGI(agbp);
 		/*
 		 * Allocate and initialize a btree cursor for ialloc btree.
@@ -275,96 +417,39 @@
 		irbp = irbuf;
 		irbufend = irbuf + nirbuf;
 		end_of_ag = 0;
-		/*
-		 * If we're returning in the middle of an allocation group,
-		 * we need to get the remainder of the chunk we're in.
-		 */
+		icount = 0;
 		if (agino > 0) {
-			xfs_inobt_rec_incore_t r;
-
 			/*
-			 * Lookup the inode chunk that this inode lives in.
+			 * In the middle of an allocation group, we need to get
+			 * the remainder of the chunk we're in.
 			 */
-			error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE,
-						 &tmp);
-			if (!error &&	/* no I/O error */
-			    tmp &&	/* lookup succeeded */
-					/* got the record, should always work */
-			    !(error = xfs_inobt_get_rec(cur, &r, &i)) &&
-			    i == 1 &&
-					/* this is the right chunk */
-			    agino < r.ir_startino + XFS_INODES_PER_CHUNK &&
-					/* lastino was not last in chunk */
-			    (chunkidx = agino - r.ir_startino + 1) <
-				    XFS_INODES_PER_CHUNK &&
-					/* there are some left allocated */
-			    xfs_inobt_maskn(chunkidx,
-				    XFS_INODES_PER_CHUNK - chunkidx) &
-				    ~r.ir_free) {
-				/*
-				 * Grab the chunk record.  Mark all the
-				 * uninteresting inodes (because they're
-				 * before our start point) free.
-				 */
-				for (i = 0; i < chunkidx; i++) {
-					if (XFS_INOBT_MASK(i) & ~r.ir_free)
-						r.ir_freecount++;
-				}
-				r.ir_free |= xfs_inobt_maskn(0, chunkidx);
+			struct xfs_inobt_rec_incore	r;
+
+			error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
+			if (error)
+				break;
+			if (icount) {
 				irbp->ir_startino = r.ir_startino;
 				irbp->ir_freecount = r.ir_freecount;
 				irbp->ir_free = r.ir_free;
 				irbp++;
 				agino = r.ir_startino + XFS_INODES_PER_CHUNK;
-				icount = XFS_INODES_PER_CHUNK - r.ir_freecount;
-			} else {
-				/*
-				 * If any of those tests failed, bump the
-				 * inode number (just in case).
-				 */
-				agino++;
-				icount = 0;
 			}
-			/*
-			 * In any case, increment to the next record.
-			 */
-			if (!error)
-				error = xfs_btree_increment(cur, 0, &tmp);
+			/* Increment to the next record */
+			error = xfs_btree_increment(cur, 0, &tmp);
 		} else {
-			/*
-			 * Start of ag.  Lookup the first inode chunk.
-			 */
+			/* Start of ag.  Lookup the first inode chunk */
 			error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
-			icount = 0;
 		}
+		if (error)
+			break;
+
 		/*
 		 * Loop through inode btree records in this ag,
 		 * until we run out of inodes or space in the buffer.
 		 */
 		while (irbp < irbufend && icount < ubcount) {
-			xfs_inobt_rec_incore_t r;
-
-			/*
-			 * Loop as long as we're unable to read the
-			 * inode btree.
-			 */
-			while (error) {
-				agino += XFS_INODES_PER_CHUNK;
-				if (XFS_AGINO_TO_AGBNO(mp, agino) >=
-						be32_to_cpu(agi->agi_length))
-					break;
-				error = xfs_inobt_lookup(cur, agino,
-							 XFS_LOOKUP_GE, &tmp);
-				cond_resched();
-			}
-			/*
-			 * If ran off the end of the ag either with an error,
-			 * or the normal way, set end and stop collecting.
-			 */
-			if (error) {
-				end_of_ag = 1;
-				break;
-			}
+			struct xfs_inobt_rec_incore	r;
 
 			error = xfs_inobt_get_rec(cur, &r, &i);
 			if (error || i == 0) {
@@ -377,25 +462,7 @@
 			 * Also start read-ahead now for this chunk.
 			 */
 			if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
-				struct blk_plug	plug;
-				/*
-				 * Loop over all clusters in the next chunk.
-				 * Do a readahead if there are any allocated
-				 * inodes in that cluster.
-				 */
-				blk_start_plug(&plug);
-				agbno = XFS_AGINO_TO_AGBNO(mp, r.ir_startino);
-				for (chunkidx = 0;
-				     chunkidx < XFS_INODES_PER_CHUNK;
-				     chunkidx += inodes_per_cluster,
-				     agbno += blks_per_cluster) {
-					if (xfs_inobt_maskn(chunkidx,
-					    inodes_per_cluster) & ~r.ir_free)
-						xfs_btree_reada_bufs(mp, agno,
-							agbno, blks_per_cluster,
-							&xfs_inode_buf_ops);
-				}
-				blk_finish_plug(&plug);
+				xfs_bulkstat_ichunk_ra(mp, agno, &r);
 				irbp->ir_startino = r.ir_startino;
 				irbp->ir_freecount = r.ir_freecount;
 				irbp->ir_free = r.ir_free;
@@ -422,57 +489,20 @@
 		irbufend = irbp;
 		for (irbp = irbuf;
 		     irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
-			/*
-			 * Now process this chunk of inodes.
-			 */
-			for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
-			     XFS_BULKSTAT_UBLEFT(ubleft) &&
-				irbp->ir_freecount < XFS_INODES_PER_CHUNK;
-			     chunkidx++, clustidx++, agino++) {
-				ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
+			struct xfs_bulkstat_agichunk ac;
 
-				ino = XFS_AGINO_TO_INO(mp, agno, agino);
-				/*
-				 * Skip if this inode is free.
-				 */
-				if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
-					lastino = ino;
-					continue;
-				}
-				/*
-				 * Count used inodes as free so we can tell
-				 * when the chunk is used up.
-				 */
-				irbp->ir_freecount++;
+			ac.ac_lastino = lastino;
+			ac.ac_ubuffer = &ubuffer;
+			ac.ac_ubleft = ubleft;
+			ac.ac_ubelem = ubelem;
+			error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
+					formatter, statstruct_size, &ac);
+			if (error)
+				rval = error;
 
-				/*
-				 * Get the inode and fill in a single buffer.
-				 */
-				ubused = statstruct_size;
-				error = formatter(mp, ino, ubufp, ubleft,
-						  &ubused, &fmterror);
-				if (fmterror == BULKSTAT_RV_NOTHING) {
-					if (error && error != ENOENT &&
-						error != EINVAL) {
-						ubleft = 0;
-						rval = error;
-						break;
-					}
-					lastino = ino;
-					continue;
-				}
-				if (fmterror == BULKSTAT_RV_GIVEUP) {
-					ubleft = 0;
-					ASSERT(error);
-					rval = error;
-					break;
-				}
-				if (ubufp)
-					ubufp += ubused;
-				ubleft -= ubused;
-				ubelem++;
-				lastino = ino;
-			}
+			lastino = ac.ac_lastino;
+			ubleft = ac.ac_ubleft;
+			ubelem = ac.ac_ubelem;
 
 			cond_resched();
 		}
@@ -512,58 +542,10 @@
 	return rval;
 }
 
-/*
- * Return stat information in bulk (by-inode) for the filesystem.
- * Special case for non-sequential one inode bulkstat.
- */
-int					/* error status */
-xfs_bulkstat_single(
-	xfs_mount_t		*mp,	/* mount point for filesystem */
-	xfs_ino_t		*lastinop, /* inode to return */
-	char			__user *buffer, /* buffer with inode stats */
-	int			*done)	/* 1 if there are more stats to get */
-{
-	int			count;	/* count value for bulkstat call */
-	int			error;	/* return value */
-	xfs_ino_t		ino;	/* filesystem inode number */
-	int			res;	/* result from bs1 */
-
-	/*
-	 * note that requesting valid inode numbers which are not allocated
-	 * to inodes will most likely cause xfs_imap_to_bp to generate warning
-	 * messages about bad magic numbers. This is ok. The fact that
-	 * the inode isn't actually an inode is handled by the
-	 * error check below. Done this way to make the usual case faster
-	 * at the expense of the error case.
-	 */
-
-	ino = *lastinop;
-	error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
-				 NULL, &res);
-	if (error) {
-		/*
-		 * Special case way failed, do it the "long" way
-		 * to see if that works.
-		 */
-		(*lastinop)--;
-		count = 1;
-		if (xfs_bulkstat(mp, lastinop, &count, xfs_bulkstat_one,
-				sizeof(xfs_bstat_t), buffer, done))
-			return error;
-		if (count == 0 || (xfs_ino_t)*lastinop != ino)
-			return error == EFSCORRUPTED ?
-				XFS_ERROR(EINVAL) : error;
-		else
-			return 0;
-	}
-	*done = 0;
-	return 0;
-}
-
 int
 xfs_inumbers_fmt(
 	void			__user *ubuffer, /* buffer to write to */
-	const xfs_inogrp_t	*buffer,	/* buffer to read from */
+	const struct xfs_inogrp	*buffer,	/* buffer to read from */
 	long			count,		/* # of elements to read */
 	long			*written)	/* # of bytes written */
 {
@@ -578,127 +560,104 @@
  */
 int					/* error status */
 xfs_inumbers(
-	xfs_mount_t	*mp,		/* mount point for filesystem */
-	xfs_ino_t	*lastino,	/* last inode returned */
-	int		*count,		/* size of buffer/count returned */
-	void		__user *ubuffer,/* buffer with inode descriptions */
-	inumbers_fmt_pf	formatter)
+	struct xfs_mount	*mp,/* mount point for filesystem */
+	xfs_ino_t		*lastino,/* last inode returned */
+	int			*count,/* size of buffer/count returned */
+	void			__user *ubuffer,/* buffer with inode descriptions */
+	inumbers_fmt_pf		formatter)
 {
-	xfs_buf_t	*agbp;
-	xfs_agino_t	agino;
-	xfs_agnumber_t	agno;
-	int		bcount;
-	xfs_inogrp_t	*buffer;
-	int		bufidx;
-	xfs_btree_cur_t	*cur;
-	int		error;
-	xfs_inobt_rec_incore_t r;
-	int		i;
-	xfs_ino_t	ino;
-	int		left;
-	int		tmp;
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, *lastino);
+	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, *lastino);
+	struct xfs_btree_cur	*cur = NULL;
+	struct xfs_buf		*agbp = NULL;
+	struct xfs_inogrp	*buffer;
+	int			bcount;
+	int			left = *count;
+	int			bufidx = 0;
+	int			error = 0;
 
-	ino = (xfs_ino_t)*lastino;
-	agno = XFS_INO_TO_AGNO(mp, ino);
-	agino = XFS_INO_TO_AGINO(mp, ino);
-	left = *count;
 	*count = 0;
+	if (agno >= mp->m_sb.sb_agcount ||
+	    *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
+		return error;
+
 	bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
 	buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
-	error = bufidx = 0;
-	cur = NULL;
-	agbp = NULL;
-	while (left > 0 && agno < mp->m_sb.sb_agcount) {
-		if (agbp == NULL) {
+	do {
+		struct xfs_inobt_rec_incore	r;
+		int				stat;
+
+		if (!agbp) {
 			error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-			if (error) {
-				/*
-				 * If we can't read the AGI of this ag,
-				 * then just skip to the next one.
-				 */
-				ASSERT(cur == NULL);
-				agbp = NULL;
-				agno++;
-				agino = 0;
-				continue;
-			}
+			if (error)
+				break;
+
 			cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
 						    XFS_BTNUM_INO);
 			error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
-						 &tmp);
-			if (error) {
-				xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
-				cur = NULL;
-				xfs_buf_relse(agbp);
-				agbp = NULL;
-				/*
-				 * Move up the last inode in the current
-				 * chunk.  The lookup_ge will always get
-				 * us the first inode in the next chunk.
-				 */
-				agino += XFS_INODES_PER_CHUNK - 1;
-				continue;
-			}
+						 &stat);
+			if (error)
+				break;
+			if (!stat)
+				goto next_ag;
 		}
-		error = xfs_inobt_get_rec(cur, &r, &i);
-		if (error || i == 0) {
-			xfs_buf_relse(agbp);
-			agbp = NULL;
-			xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
-			cur = NULL;
-			agno++;
-			agino = 0;
-			continue;
-		}
+
+		error = xfs_inobt_get_rec(cur, &r, &stat);
+		if (error)
+			break;
+		if (!stat)
+			goto next_ag;
+
 		agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
 		buffer[bufidx].xi_startino =
 			XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
 		buffer[bufidx].xi_alloccount =
 			XFS_INODES_PER_CHUNK - r.ir_freecount;
 		buffer[bufidx].xi_allocmask = ~r.ir_free;
-		bufidx++;
-		left--;
-		if (bufidx == bcount) {
-			long written;
-			if (formatter(ubuffer, buffer, bufidx, &written)) {
-				error = XFS_ERROR(EFAULT);
+		if (++bufidx == bcount) {
+			long	written;
+
+			error = formatter(ubuffer, buffer, bufidx, &written);
+			if (error)
 				break;
-			}
 			ubuffer += written;
 			*count += bufidx;
 			bufidx = 0;
 		}
-		if (left) {
-			error = xfs_btree_increment(cur, 0, &tmp);
-			if (error) {
-				xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
-				cur = NULL;
-				xfs_buf_relse(agbp);
-				agbp = NULL;
-				/*
-				 * The agino value has already been bumped.
-				 * Just try to skip up to it.
-				 */
-				agino += XFS_INODES_PER_CHUNK;
-				continue;
-			}
-		}
-	}
+		if (!--left)
+			break;
+
+		error = xfs_btree_increment(cur, 0, &stat);
+		if (error)
+			break;
+		if (stat)
+			continue;
+
+next_ag:
+		xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+		cur = NULL;
+		xfs_buf_relse(agbp);
+		agbp = NULL;
+		agino = 0;
+	} while (++agno < mp->m_sb.sb_agcount);
+
 	if (!error) {
 		if (bufidx) {
-			long written;
-			if (formatter(ubuffer, buffer, bufidx, &written))
-				error = XFS_ERROR(EFAULT);
-			else
+			long	written;
+
+			error = formatter(ubuffer, buffer, bufidx, &written);
+			if (!error)
 				*count += bufidx;
 		}
 		*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
 	}
+
 	kmem_free(buffer);
 	if (cur)
 		xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
 					   XFS_BTREE_NOERROR));
 	if (agbp)
 		xfs_buf_relse(agbp);
+
 	return error;
 }
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index 97295d9..aaed080 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -30,6 +30,22 @@
 			       int		*ubused,
 			       int		*stat);
 
+struct xfs_bulkstat_agichunk {
+	xfs_ino_t	ac_lastino;	/* last inode returned */
+	char		__user **ac_ubuffer;/* pointer into user's buffer */
+	int		ac_ubleft;	/* bytes left in user's buffer */
+	int		ac_ubelem;	/* spaces used in user's buffer */
+};
+
+int
+xfs_bulkstat_ag_ichunk(
+	struct xfs_mount		*mp,
+	xfs_agnumber_t			agno,
+	struct xfs_inobt_rec_incore	*irbp,
+	bulkstat_one_pf			formatter,
+	size_t				statstruct_size,
+	struct xfs_bulkstat_agichunk	*acp);
+
 /*
  * Values for stat return value.
  */
@@ -50,13 +66,6 @@
 	char		__user *ubuffer,/* buffer with inode stats */
 	int		*done);		/* 1 if there are more stats to get */
 
-int
-xfs_bulkstat_single(
-	xfs_mount_t		*mp,
-	xfs_ino_t		*lastinop,
-	char			__user *buffer,
-	int			*done);
-
 typedef int (*bulkstat_one_fmt_pf)(  /* used size in bytes or negative error */
 	void			__user *ubuffer, /* buffer to write to */
 	int			ubsize,		 /* remaining user buffer sz */
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index 825249d..d10dc8f 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -21,18 +21,6 @@
 #include <linux/types.h>
 
 /*
- * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
- * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
- */
-#if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64)
-# define XFS_BIG_BLKNOS	1
-# define XFS_BIG_INUMS	1
-#else
-# define XFS_BIG_BLKNOS	0
-# define XFS_BIG_INUMS	0
-#endif
-
-/*
  * Kernel specific type declarations for XFS
  */
 typedef signed char		__int8_t;
@@ -113,7 +101,7 @@
 #include <asm/byteorder.h>
 #include <asm/unaligned.h>
 
-#include "xfs_vnode.h"
+#include "xfs_fs.h"
 #include "xfs_stats.h"
 #include "xfs_sysctl.h"
 #include "xfs_iops.h"
@@ -191,6 +179,17 @@
 #define MAX(a,b)	(max(a,b))
 #define howmany(x, y)	(((x)+((y)-1))/(y))
 
+/*
+ * XFS wrapper structure for sysfs support. It depends on external data
+ * structures and is embedded in various internal data structures to implement
+ * the XFS sysfs object heirarchy. Define it here for broad access throughout
+ * the codebase.
+ */
+struct xfs_kobj {
+	struct kobject		kobject;
+	struct completion	complete;
+};
+
 /* Kernel uid/gid conversion. These are used to convert to/from the on disk
  * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
  * The conversion here is type only, the value will remain the same since we
@@ -331,7 +330,7 @@
 {
 	x += y - 1;
 	do_div(x, y);
-	return(x * y);
+	return x * y;
 }
 
 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 292308d..ca4fd5b 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -34,6 +34,7 @@
 #include "xfs_trace.h"
 #include "xfs_fsops.h"
 #include "xfs_cksum.h"
+#include "xfs_sysfs.h"
 
 kmem_zone_t	*xfs_log_ticket_zone;
 
@@ -283,7 +284,7 @@
 	return 0;
 shutdown:
 	list_del_init(&tic->t_queue);
-	return XFS_ERROR(EIO);
+	return -EIO;
 }
 
 /*
@@ -377,7 +378,7 @@
 	int			error = 0;
 
 	if (XLOG_FORCED_SHUTDOWN(log))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	XFS_STATS_INC(xs_try_logspace);
 
@@ -446,7 +447,7 @@
 	ASSERT(client == XFS_TRANSACTION || client == XFS_LOG);
 
 	if (XLOG_FORCED_SHUTDOWN(log))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	XFS_STATS_INC(xs_try_logspace);
 
@@ -454,7 +455,7 @@
 	tic = xlog_ticket_alloc(log, unit_bytes, cnt, client, permanent,
 				KM_SLEEP | KM_MAYFAIL);
 	if (!tic)
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 
 	tic->t_trans_type = t_type;
 	*ticp = tic;
@@ -590,7 +591,7 @@
 {
 	if (xlog_state_release_iclog(mp->m_log, iclog)) {
 		xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
-		return EIO;
+		return -EIO;
 	}
 
 	return 0;
@@ -628,7 +629,7 @@
 
 	mp->m_log = xlog_alloc_log(mp, log_target, blk_offset, num_bblks);
 	if (IS_ERR(mp->m_log)) {
-		error = -PTR_ERR(mp->m_log);
+		error = PTR_ERR(mp->m_log);
 		goto out;
 	}
 
@@ -652,18 +653,18 @@
 		xfs_warn(mp,
 		"Log size %d blocks too small, minimum size is %d blocks",
 			 mp->m_sb.sb_logblocks, min_logfsbs);
-		error = EINVAL;
+		error = -EINVAL;
 	} else if (mp->m_sb.sb_logblocks > XFS_MAX_LOG_BLOCKS) {
 		xfs_warn(mp,
 		"Log size %d blocks too large, maximum size is %lld blocks",
 			 mp->m_sb.sb_logblocks, XFS_MAX_LOG_BLOCKS);
-		error = EINVAL;
+		error = -EINVAL;
 	} else if (XFS_FSB_TO_B(mp, mp->m_sb.sb_logblocks) > XFS_MAX_LOG_BYTES) {
 		xfs_warn(mp,
 		"log size %lld bytes too large, maximum size is %lld bytes",
 			 XFS_FSB_TO_B(mp, mp->m_sb.sb_logblocks),
 			 XFS_MAX_LOG_BYTES);
-		error = EINVAL;
+		error = -EINVAL;
 	}
 	if (error) {
 		if (xfs_sb_version_hascrc(&mp->m_sb)) {
@@ -707,6 +708,11 @@
 		}
 	}
 
+	error = xfs_sysfs_init(&mp->m_log->l_kobj, &xfs_log_ktype, &mp->m_kobj,
+			       "log");
+	if (error)
+		goto out_destroy_ail;
+
 	/* Normal transactions can now occur */
 	mp->m_log->l_flags &= ~XLOG_ACTIVE_RECOVERY;
 
@@ -947,6 +953,9 @@
 	xfs_log_quiesce(mp);
 
 	xfs_trans_ail_destroy(mp);
+
+	xfs_sysfs_del(&mp->m_log->l_kobj);
+
 	xlog_dealloc_log(mp->m_log);
 }
 
@@ -1313,7 +1322,7 @@
 	xlog_in_core_t		*iclog, *prev_iclog=NULL;
 	xfs_buf_t		*bp;
 	int			i;
-	int			error = ENOMEM;
+	int			error = -ENOMEM;
 	uint			log2_size = 0;
 
 	log = kmem_zalloc(sizeof(struct xlog), KM_MAYFAIL);
@@ -1340,7 +1349,7 @@
 	xlog_grant_head_init(&log->l_reserve_head);
 	xlog_grant_head_init(&log->l_write_head);
 
-	error = EFSCORRUPTED;
+	error = -EFSCORRUPTED;
 	if (xfs_sb_version_hassector(&mp->m_sb)) {
 	        log2_size = mp->m_sb.sb_logsectlog;
 		if (log2_size < BBSHIFT) {
@@ -1369,8 +1378,14 @@
 
 	xlog_get_iclog_buffer_size(mp, log);
 
-	error = ENOMEM;
-	bp = xfs_buf_alloc(mp->m_logdev_targp, 0, BTOBB(log->l_iclog_size), 0);
+	/*
+	 * Use a NULL block for the extra log buffer used during splits so that
+	 * it will trigger errors if we ever try to do IO on it without first
+	 * having set it up properly.
+	 */
+	error = -ENOMEM;
+	bp = xfs_buf_alloc(mp->m_logdev_targp, XFS_BUF_DADDR_NULL,
+			   BTOBB(log->l_iclog_size), 0);
 	if (!bp)
 		goto out_free_log;
 
@@ -1463,7 +1478,7 @@
 out_free_log:
 	kmem_free(log);
 out:
-	return ERR_PTR(-error);
+	return ERR_PTR(error);
 }	/* xlog_alloc_log */
 
 
@@ -1661,7 +1676,7 @@
 
 	xfs_buf_lock(bp);
 	if (iclog->ic_state & XLOG_STATE_IOERROR) {
-		xfs_buf_ioerror(bp, EIO);
+		xfs_buf_ioerror(bp, -EIO);
 		xfs_buf_stale(bp);
 		xfs_buf_ioend(bp, 0);
 		/*
@@ -2360,7 +2375,7 @@
 
 			ophdr = xlog_write_setup_ophdr(log, ptr, ticket, flags);
 			if (!ophdr)
-				return XFS_ERROR(EIO);
+				return -EIO;
 
 			xlog_write_adv_cnt(&ptr, &len, &log_offset,
 					   sizeof(struct xlog_op_header));
@@ -2859,7 +2874,7 @@
 	spin_lock(&log->l_icloglock);
 	if (XLOG_FORCED_SHUTDOWN(log)) {
 		spin_unlock(&log->l_icloglock);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	iclog = log->l_iclog;
@@ -3047,7 +3062,7 @@
 	int		sync = 0;	/* do we sync? */
 
 	if (iclog->ic_state & XLOG_STATE_IOERROR)
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	ASSERT(atomic_read(&iclog->ic_refcnt) > 0);
 	if (!atomic_dec_and_lock(&iclog->ic_refcnt, &log->l_icloglock))
@@ -3055,7 +3070,7 @@
 
 	if (iclog->ic_state & XLOG_STATE_IOERROR) {
 		spin_unlock(&log->l_icloglock);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	ASSERT(iclog->ic_state == XLOG_STATE_ACTIVE ||
 	       iclog->ic_state == XLOG_STATE_WANT_SYNC);
@@ -3172,7 +3187,7 @@
 	iclog = log->l_iclog;
 	if (iclog->ic_state & XLOG_STATE_IOERROR) {
 		spin_unlock(&log->l_icloglock);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	/* If the head iclog is not active nor dirty, we just attach
@@ -3210,7 +3225,7 @@
 				spin_unlock(&log->l_icloglock);
 
 				if (xlog_state_release_iclog(log, iclog))
-					return XFS_ERROR(EIO);
+					return -EIO;
 
 				if (log_flushed)
 					*log_flushed = 1;
@@ -3246,7 +3261,7 @@
 		 */
 		if (iclog->ic_state & XLOG_STATE_IOERROR) {
 			spin_unlock(&log->l_icloglock);
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 		XFS_STATS_INC(xs_log_force_sleep);
 		xlog_wait(&iclog->ic_force_wait, &log->l_icloglock);
@@ -3256,7 +3271,7 @@
 		 * and the memory read should be atomic.
 		 */
 		if (iclog->ic_state & XLOG_STATE_IOERROR)
-			return XFS_ERROR(EIO);
+			return -EIO;
 		if (log_flushed)
 			*log_flushed = 1;
 	} else {
@@ -3324,7 +3339,7 @@
 	iclog = log->l_iclog;
 	if (iclog->ic_state & XLOG_STATE_IOERROR) {
 		spin_unlock(&log->l_icloglock);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	do {
@@ -3375,7 +3390,7 @@
 			xlog_state_switch_iclogs(log, iclog, 0);
 			spin_unlock(&log->l_icloglock);
 			if (xlog_state_release_iclog(log, iclog))
-				return XFS_ERROR(EIO);
+				return -EIO;
 			if (log_flushed)
 				*log_flushed = 1;
 			spin_lock(&log->l_icloglock);
@@ -3390,7 +3405,7 @@
 			 */
 			if (iclog->ic_state & XLOG_STATE_IOERROR) {
 				spin_unlock(&log->l_icloglock);
-				return XFS_ERROR(EIO);
+				return -EIO;
 			}
 			XFS_STATS_INC(xs_log_force_sleep);
 			xlog_wait(&iclog->ic_force_wait, &log->l_icloglock);
@@ -3400,7 +3415,7 @@
 			 * and the memory read should be atomic.
 			 */
 			if (iclog->ic_state & XLOG_STATE_IOERROR)
-				return XFS_ERROR(EIO);
+				return -EIO;
 
 			if (log_flushed)
 				*log_flushed = 1;
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index b3425b3..f6b79e5 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -78,8 +78,6 @@
 {
 	log->l_cilp->xc_ctx->ticket = xlog_cil_ticket_alloc(log);
 	log->l_cilp->xc_ctx->sequence = 1;
-	log->l_cilp->xc_ctx->commit_lsn = xlog_assign_lsn(log->l_curr_cycle,
-								log->l_curr_block);
 }
 
 /*
@@ -634,7 +632,7 @@
 	xfs_log_ticket_put(tic);
 out_abort:
 	xlog_cil_committed(ctx, XFS_LI_ABORTED);
-	return XFS_ERROR(EIO);
+	return -EIO;
 }
 
 static void
@@ -928,12 +926,12 @@
 
 	cil = kmem_zalloc(sizeof(*cil), KM_SLEEP|KM_MAYFAIL);
 	if (!cil)
-		return ENOMEM;
+		return -ENOMEM;
 
 	ctx = kmem_zalloc(sizeof(*ctx), KM_SLEEP|KM_MAYFAIL);
 	if (!ctx) {
 		kmem_free(cil);
-		return ENOMEM;
+		return -ENOMEM;
 	}
 
 	INIT_WORK(&cil->xc_push_work, xlog_cil_push_work);
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 9bc403a..db7cbde 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -405,6 +405,8 @@
 	struct xlog_grant_head	l_reserve_head;
 	struct xlog_grant_head	l_write_head;
 
+	struct xfs_kobj		l_kobj;
+
 	/* The following field are used for debugging; need to hold icloglock */
 #ifdef DEBUG
 	char			*l_iclog_bak[XLOG_MAX_ICLOGS];
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 981af0f..1fd5787 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -179,7 +179,7 @@
 		xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer",
 			nbblks);
 		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 	}
 
 	blk_no = round_down(blk_no, log->l_sectBBsize);
@@ -194,7 +194,7 @@
 	bp->b_error = 0;
 
 	if (XFS_FORCED_SHUTDOWN(log->l_mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	xfs_buf_iorequest(bp);
 	error = xfs_buf_iowait(bp);
@@ -268,7 +268,7 @@
 		xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer",
 			nbblks);
 		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
-		return EFSCORRUPTED;
+		return -EFSCORRUPTED;
 	}
 
 	blk_no = round_down(blk_no, log->l_sectBBsize);
@@ -330,14 +330,14 @@
 		xlog_header_check_dump(mp, head);
 		XFS_ERROR_REPORT("xlog_header_check_recover(1)",
 				 XFS_ERRLEVEL_HIGH, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	} else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) {
 		xfs_warn(mp,
 	"dirty log entry has mismatched uuid - can't recover");
 		xlog_header_check_dump(mp, head);
 		XFS_ERROR_REPORT("xlog_header_check_recover(2)",
 				 XFS_ERRLEVEL_HIGH, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -364,7 +364,7 @@
 		xlog_header_check_dump(mp, head);
 		XFS_ERROR_REPORT("xlog_header_check_mount",
 				 XFS_ERRLEVEL_HIGH, mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -462,7 +462,7 @@
 	while (!(bp = xlog_get_bp(log, bufblks))) {
 		bufblks >>= 1;
 		if (bufblks < log->l_sectBBsize)
-			return ENOMEM;
+			return -ENOMEM;
 	}
 
 	for (i = start_blk; i < start_blk + nbblks; i += bufblks) {
@@ -524,7 +524,7 @@
 
 	if (!(bp = xlog_get_bp(log, num_blks))) {
 		if (!(bp = xlog_get_bp(log, 1)))
-			return ENOMEM;
+			return -ENOMEM;
 		smallmem = 1;
 	} else {
 		error = xlog_bread(log, start_blk, num_blks, bp, &offset);
@@ -539,7 +539,7 @@
 			xfs_warn(log->l_mp,
 		"Log inconsistent (didn't find previous header)");
 			ASSERT(0);
-			error = XFS_ERROR(EIO);
+			error = -EIO;
 			goto out;
 		}
 
@@ -564,7 +564,7 @@
 	 * will be called again for the end of the physical log.
 	 */
 	if (i == -1) {
-		error = -1;
+		error = 1;
 		goto out;
 	}
 
@@ -628,7 +628,12 @@
 	int		error, log_bbnum = log->l_logBBsize;
 
 	/* Is the end of the log device zeroed? */
-	if ((error = xlog_find_zeroed(log, &first_blk)) == -1) {
+	error = xlog_find_zeroed(log, &first_blk);
+	if (error < 0) {
+		xfs_warn(log->l_mp, "empty log check failed");
+		return error;
+	}
+	if (error == 1) {
 		*return_head_blk = first_blk;
 
 		/* Is the whole lot zeroed? */
@@ -641,15 +646,12 @@
 		}
 
 		return 0;
-	} else if (error) {
-		xfs_warn(log->l_mp, "empty log check failed");
-		return error;
 	}
 
 	first_blk = 0;			/* get cycle # of 1st block */
 	bp = xlog_get_bp(log, 1);
 	if (!bp)
-		return ENOMEM;
+		return -ENOMEM;
 
 	error = xlog_bread(log, 0, 1, bp, &offset);
 	if (error)
@@ -818,29 +820,29 @@
 		start_blk = head_blk - num_scan_bblks; /* don't read head_blk */
 
 		/* start ptr at last block ptr before head_blk */
-		if ((error = xlog_find_verify_log_record(log, start_blk,
-							&head_blk, 0)) == -1) {
-			error = XFS_ERROR(EIO);
-			goto bp_err;
-		} else if (error)
+		error = xlog_find_verify_log_record(log, start_blk, &head_blk, 0);
+		if (error == 1)
+			error = -EIO;
+		if (error)
 			goto bp_err;
 	} else {
 		start_blk = 0;
 		ASSERT(head_blk <= INT_MAX);
-		if ((error = xlog_find_verify_log_record(log, start_blk,
-							&head_blk, 0)) == -1) {
+		error = xlog_find_verify_log_record(log, start_blk, &head_blk, 0);
+		if (error < 0)
+			goto bp_err;
+		if (error == 1) {
 			/* We hit the beginning of the log during our search */
 			start_blk = log_bbnum - (num_scan_bblks - head_blk);
 			new_blk = log_bbnum;
 			ASSERT(start_blk <= INT_MAX &&
 				(xfs_daddr_t) log_bbnum-start_blk >= 0);
 			ASSERT(head_blk <= INT_MAX);
-			if ((error = xlog_find_verify_log_record(log,
-							start_blk, &new_blk,
-							(int)head_blk)) == -1) {
-				error = XFS_ERROR(EIO);
-				goto bp_err;
-			} else if (error)
+			error = xlog_find_verify_log_record(log, start_blk,
+							&new_blk, (int)head_blk);
+			if (error == 1)
+				error = -EIO;
+			if (error)
 				goto bp_err;
 			if (new_blk != log_bbnum)
 				head_blk = new_blk;
@@ -911,7 +913,7 @@
 
 	bp = xlog_get_bp(log, 1);
 	if (!bp)
-		return ENOMEM;
+		return -ENOMEM;
 	if (*head_blk == 0) {				/* special case */
 		error = xlog_bread(log, 0, 1, bp, &offset);
 		if (error)
@@ -961,7 +963,7 @@
 		xfs_warn(log->l_mp, "%s: couldn't find sync record", __func__);
 		xlog_put_bp(bp);
 		ASSERT(0);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	/* find blk_no of tail of log */
@@ -1092,8 +1094,8 @@
  *
  * Return:
  *	0  => the log is completely written to
- *	-1 => use *blk_no as the first block of the log
- *	>0 => error has occurred
+ *	1 => use *blk_no as the first block of the log
+ *	<0 => error has occurred
  */
 STATIC int
 xlog_find_zeroed(
@@ -1112,7 +1114,7 @@
 	/* check totally zeroed log */
 	bp = xlog_get_bp(log, 1);
 	if (!bp)
-		return ENOMEM;
+		return -ENOMEM;
 	error = xlog_bread(log, 0, 1, bp, &offset);
 	if (error)
 		goto bp_err;
@@ -1121,7 +1123,7 @@
 	if (first_cycle == 0) {		/* completely zeroed log */
 		*blk_no = 0;
 		xlog_put_bp(bp);
-		return -1;
+		return 1;
 	}
 
 	/* check partially zeroed log */
@@ -1141,7 +1143,7 @@
 		 */
 		xfs_warn(log->l_mp,
 			"Log inconsistent or not a log (last==0, first!=1)");
-		error = XFS_ERROR(EINVAL);
+		error = -EINVAL;
 		goto bp_err;
 	}
 
@@ -1179,19 +1181,18 @@
 	 * Potentially backup over partial log record write.  We don't need
 	 * to search the end of the log because we know it is zero.
 	 */
-	if ((error = xlog_find_verify_log_record(log, start_blk,
-				&last_blk, 0)) == -1) {
-	    error = XFS_ERROR(EIO);
-	    goto bp_err;
-	} else if (error)
-	    goto bp_err;
+	error = xlog_find_verify_log_record(log, start_blk, &last_blk, 0);
+	if (error == 1)
+		error = -EIO;
+	if (error)
+		goto bp_err;
 
 	*blk_no = last_blk;
 bp_err:
 	xlog_put_bp(bp);
 	if (error)
 		return error;
-	return -1;
+	return 1;
 }
 
 /*
@@ -1251,7 +1252,7 @@
 	while (!(bp = xlog_get_bp(log, bufblks))) {
 		bufblks >>= 1;
 		if (bufblks < sectbb)
-			return ENOMEM;
+			return -ENOMEM;
 	}
 
 	/* We may need to do a read at the start to fill in part of
@@ -1354,7 +1355,7 @@
 		if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) {
 			XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)",
 					 XFS_ERRLEVEL_LOW, log->l_mp);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 		tail_distance = tail_block + (log->l_logBBsize - head_block);
 	} else {
@@ -1366,7 +1367,7 @@
 		if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){
 			XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)",
 					 XFS_ERRLEVEL_LOW, log->l_mp);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 		tail_distance = tail_block - head_block;
 	}
@@ -1551,7 +1552,7 @@
 			xfs_warn(log->l_mp, "%s: bad header magic number",
 				__func__);
 			ASSERT(0);
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 		if (len == sizeof(xfs_trans_header_t))
 			xlog_recover_add_item(&trans->r_itemq);
@@ -1581,7 +1582,7 @@
 				  in_f->ilf_size);
 			ASSERT(0);
 			kmem_free(ptr);
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 
 		item->ri_total = in_f->ilf_size;
@@ -1702,7 +1703,7 @@
 			 */
 			if (!list_empty(&sort_list))
 				list_splice_init(&sort_list, &trans->r_itemq);
-			error = XFS_ERROR(EIO);
+			error = -EIO;
 			goto out;
 		}
 	}
@@ -1943,7 +1944,7 @@
 				item, bp);
 			XFS_ERROR_REPORT("xlog_recover_do_inode_buf",
 					 XFS_ERRLEVEL_LOW, mp);
-			return XFS_ERROR(EFSCORRUPTED);
+			return -EFSCORRUPTED;
 		}
 
 		buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp,
@@ -2125,6 +2126,17 @@
 	__uint16_t		magic16;
 	__uint16_t		magicda;
 
+	/*
+	 * We can only do post recovery validation on items on CRC enabled
+	 * fielsystems as we need to know when the buffer was written to be able
+	 * to determine if we should have replayed the item. If we replay old
+	 * metadata over a newer buffer, then it will enter a temporarily
+	 * inconsistent state resulting in verification failures. Hence for now
+	 * just avoid the verification stage for non-crc filesystems
+	 */
+	if (!xfs_sb_version_hascrc(&mp->m_sb))
+		return;
+
 	magic32 = be32_to_cpu(*(__be32 *)bp->b_addr);
 	magic16 = be16_to_cpu(*(__be16*)bp->b_addr);
 	magicda = be16_to_cpu(info->magic);
@@ -2162,8 +2174,6 @@
 		bp->b_ops = &xfs_agf_buf_ops;
 		break;
 	case XFS_BLFT_AGFL_BUF:
-		if (!xfs_sb_version_hascrc(&mp->m_sb))
-			break;
 		if (magic32 != XFS_AGFL_MAGIC) {
 			xfs_warn(mp, "Bad AGFL block magic!");
 			ASSERT(0);
@@ -2196,10 +2206,6 @@
 #endif
 		break;
 	case XFS_BLFT_DINO_BUF:
-		/*
-		 * we get here with inode allocation buffers, not buffers that
-		 * track unlinked list changes.
-		 */
 		if (magic16 != XFS_DINODE_MAGIC) {
 			xfs_warn(mp, "Bad INODE block magic!");
 			ASSERT(0);
@@ -2279,8 +2285,6 @@
 		bp->b_ops = &xfs_attr3_leaf_buf_ops;
 		break;
 	case XFS_BLFT_ATTR_RMT_BUF:
-		if (!xfs_sb_version_hascrc(&mp->m_sb))
-			break;
 		if (magic32 != XFS_ATTR3_RMT_MAGIC) {
 			xfs_warn(mp, "Bad attr remote magic!");
 			ASSERT(0);
@@ -2387,16 +2391,7 @@
 	/* Shouldn't be any more regions */
 	ASSERT(i == item->ri_total);
 
-	/*
-	 * We can only do post recovery validation on items on CRC enabled
-	 * fielsystems as we need to know when the buffer was written to be able
-	 * to determine if we should have replayed the item. If we replay old
-	 * metadata over a newer buffer, then it will enter a temporarily
-	 * inconsistent state resulting in verification failures. Hence for now
-	 * just avoid the verification stage for non-crc filesystems
-	 */
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		xlog_recover_validate_buf_type(mp, bp, buf_f);
+	xlog_recover_validate_buf_type(mp, bp, buf_f);
 }
 
 /*
@@ -2404,8 +2399,11 @@
  * Simple algorithm: if we have found a QUOTAOFF log item of the same type
  * (ie. USR or GRP), then just toss this buffer away; don't recover it.
  * Else, treat it as a regular buffer and do recovery.
+ *
+ * Return false if the buffer was tossed and true if we recovered the buffer to
+ * indicate to the caller if the buffer needs writing.
  */
-STATIC void
+STATIC bool
 xlog_recover_do_dquot_buffer(
 	struct xfs_mount		*mp,
 	struct xlog			*log,
@@ -2420,9 +2418,8 @@
 	/*
 	 * Filesystems are required to send in quota flags at mount time.
 	 */
-	if (mp->m_qflags == 0) {
-		return;
-	}
+	if (!mp->m_qflags)
+		return false;
 
 	type = 0;
 	if (buf_f->blf_flags & XFS_BLF_UDQUOT_BUF)
@@ -2435,9 +2432,10 @@
 	 * This type of quotas was turned off, so ignore this buffer
 	 */
 	if (log->l_quotaoffs_flag & type)
-		return;
+		return false;
 
 	xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
+	return true;
 }
 
 /*
@@ -2496,7 +2494,7 @@
 	bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len,
 			  buf_flags, NULL);
 	if (!bp)
-		return XFS_ERROR(ENOMEM);
+		return -ENOMEM;
 	error = bp->b_error;
 	if (error) {
 		xfs_buf_ioerror_alert(bp, "xlog_recover_do..(read#1)");
@@ -2504,23 +2502,44 @@
 	}
 
 	/*
-	 * recover the buffer only if we get an LSN from it and it's less than
+	 * Recover the buffer only if we get an LSN from it and it's less than
 	 * the lsn of the transaction we are replaying.
+	 *
+	 * Note that we have to be extremely careful of readahead here.
+	 * Readahead does not attach verfiers to the buffers so if we don't
+	 * actually do any replay after readahead because of the LSN we found
+	 * in the buffer if more recent than that current transaction then we
+	 * need to attach the verifier directly. Failure to do so can lead to
+	 * future recovery actions (e.g. EFI and unlinked list recovery) can
+	 * operate on the buffers and they won't get the verifier attached. This
+	 * can lead to blocks on disk having the correct content but a stale
+	 * CRC.
+	 *
+	 * It is safe to assume these clean buffers are currently up to date.
+	 * If the buffer is dirtied by a later transaction being replayed, then
+	 * the verifier will be reset to match whatever recover turns that
+	 * buffer into.
 	 */
 	lsn = xlog_recover_get_buf_lsn(mp, bp);
-	if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0)
+	if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) {
+		xlog_recover_validate_buf_type(mp, bp, buf_f);
 		goto out_release;
+	}
 
 	if (buf_f->blf_flags & XFS_BLF_INODE_BUF) {
 		error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f);
+		if (error)
+			goto out_release;
 	} else if (buf_f->blf_flags &
 		  (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) {
-		xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
+		bool	dirty;
+
+		dirty = xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
+		if (!dirty)
+			goto out_release;
 	} else {
 		xlog_recover_do_reg_buffer(mp, item, bp, buf_f);
 	}
-	if (error)
-		goto out_release;
 
 	/*
 	 * Perform delayed write on the buffer.  Asynchronous writes will be
@@ -2598,7 +2617,7 @@
 
 	ip = xfs_inode_alloc(mp, in_f->ilf_ino);
 	if (!ip)
-		return ENOMEM;
+		return -ENOMEM;
 
 	/* instantiate the inode */
 	xfs_dinode_from_disk(&ip->i_d, dip);
@@ -2676,7 +2695,7 @@
 	bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0,
 			  &xfs_inode_buf_ops);
 	if (!bp) {
-		error = ENOMEM;
+		error = -ENOMEM;
 		goto error;
 	}
 	error = bp->b_error;
@@ -2697,7 +2716,7 @@
 			__func__, dip, bp, in_f->ilf_ino);
 		XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)",
 				 XFS_ERRLEVEL_LOW, mp);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto out_release;
 	}
 	dicp = item->ri_buf[1].i_addr;
@@ -2707,7 +2726,7 @@
 			__func__, item, in_f->ilf_ino);
 		XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)",
 				 XFS_ERRLEVEL_LOW, mp);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto out_release;
 	}
 
@@ -2764,7 +2783,7 @@
 		"%s: Bad regular inode log record, rec ptr 0x%p, "
 		"ino ptr = 0x%p, ino bp = 0x%p, ino %Ld",
 				__func__, item, dip, bp, in_f->ilf_ino);
-			error = EFSCORRUPTED;
+			error = -EFSCORRUPTED;
 			goto out_release;
 		}
 	} else if (unlikely(S_ISDIR(dicp->di_mode))) {
@@ -2777,7 +2796,7 @@
 		"%s: Bad dir inode log record, rec ptr 0x%p, "
 		"ino ptr = 0x%p, ino bp = 0x%p, ino %Ld",
 				__func__, item, dip, bp, in_f->ilf_ino);
-			error = EFSCORRUPTED;
+			error = -EFSCORRUPTED;
 			goto out_release;
 		}
 	}
@@ -2790,7 +2809,7 @@
 			__func__, item, dip, bp, in_f->ilf_ino,
 			dicp->di_nextents + dicp->di_anextents,
 			dicp->di_nblocks);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto out_release;
 	}
 	if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) {
@@ -2800,7 +2819,7 @@
 	"%s: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, "
 	"dino bp 0x%p, ino %Ld, forkoff 0x%x", __func__,
 			item, dip, bp, in_f->ilf_ino, dicp->di_forkoff);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto out_release;
 	}
 	isize = xfs_icdinode_size(dicp->di_version);
@@ -2810,7 +2829,7 @@
 		xfs_alert(mp,
 			"%s: Bad inode log record length %d, rec ptr 0x%p",
 			__func__, item->ri_buf[1].i_len, item);
-		error = EFSCORRUPTED;
+		error = -EFSCORRUPTED;
 		goto out_release;
 	}
 
@@ -2898,7 +2917,7 @@
 		default:
 			xfs_warn(log->l_mp, "%s: Invalid flag", __func__);
 			ASSERT(0);
-			error = EIO;
+			error = -EIO;
 			goto out_release;
 		}
 	}
@@ -2919,7 +2938,7 @@
 error:
 	if (need_free)
 		kmem_free(in_f);
-	return XFS_ERROR(error);
+	return error;
 }
 
 /*
@@ -2946,7 +2965,7 @@
 	if (qoff_f->qf_flags & XFS_GQUOTA_ACCT)
 		log->l_quotaoffs_flag |= XFS_DQ_GROUP;
 
-	return (0);
+	return 0;
 }
 
 /*
@@ -2971,17 +2990,17 @@
 	 * Filesystems are required to send in quota flags at mount time.
 	 */
 	if (mp->m_qflags == 0)
-		return (0);
+		return 0;
 
 	recddq = item->ri_buf[1].i_addr;
 	if (recddq == NULL) {
 		xfs_alert(log->l_mp, "NULL dquot in %s.", __func__);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 	if (item->ri_buf[1].i_len < sizeof(xfs_disk_dquot_t)) {
 		xfs_alert(log->l_mp, "dquot too small (%d) in %s.",
 			item->ri_buf[1].i_len, __func__);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	/*
@@ -2990,7 +3009,7 @@
 	type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP);
 	ASSERT(type);
 	if (log->l_quotaoffs_flag & type)
-		return (0);
+		return 0;
 
 	/*
 	 * At this point we know that quota was _not_ turned off.
@@ -3007,12 +3026,19 @@
 	error = xfs_dqcheck(mp, recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN,
 			   "xlog_recover_dquot_pass2 (log copy)");
 	if (error)
-		return XFS_ERROR(EIO);
+		return -EIO;
 	ASSERT(dq_f->qlf_len == 1);
 
+	/*
+	 * At this point we are assuming that the dquots have been allocated
+	 * and hence the buffer has valid dquots stamped in it. It should,
+	 * therefore, pass verifier validation. If the dquot is bad, then the
+	 * we'll return an error here, so we don't need to specifically check
+	 * the dquot in the buffer after the verifier has run.
+	 */
 	error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno,
 				   XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp,
-				   NULL);
+				   &xfs_dquot_buf_ops);
 	if (error)
 		return error;
 
@@ -3020,18 +3046,6 @@
 	ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset);
 
 	/*
-	 * At least the magic num portion should be on disk because this
-	 * was among a chunk of dquots created earlier, and we did some
-	 * minimal initialization then.
-	 */
-	error = xfs_dqcheck(mp, ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN,
-			   "xlog_recover_dquot_pass2");
-	if (error) {
-		xfs_buf_relse(bp);
-		return XFS_ERROR(EIO);
-	}
-
-	/*
 	 * If the dquot has an LSN in it, recover the dquot only if it's less
 	 * than the lsn of the transaction we are replaying.
 	 */
@@ -3178,38 +3192,38 @@
 	icl = (struct xfs_icreate_log *)item->ri_buf[0].i_addr;
 	if (icl->icl_type != XFS_LI_ICREATE) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad type");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	if (icl->icl_size != 1) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad icl size");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	agno = be32_to_cpu(icl->icl_ag);
 	if (agno >= mp->m_sb.sb_agcount) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agno");
-		return EINVAL;
+		return -EINVAL;
 	}
 	agbno = be32_to_cpu(icl->icl_agbno);
 	if (!agbno || agbno == NULLAGBLOCK || agbno >= mp->m_sb.sb_agblocks) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad agbno");
-		return EINVAL;
+		return -EINVAL;
 	}
 	isize = be32_to_cpu(icl->icl_isize);
 	if (isize != mp->m_sb.sb_inodesize) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad isize");
-		return EINVAL;
+		return -EINVAL;
 	}
 	count = be32_to_cpu(icl->icl_count);
 	if (!count) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count");
-		return EINVAL;
+		return -EINVAL;
 	}
 	length = be32_to_cpu(icl->icl_length);
 	if (!length || length >= mp->m_sb.sb_agblocks) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad length");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	/* existing allocation is fixed value */
@@ -3218,7 +3232,7 @@
 	if (count != mp->m_ialloc_inos ||
 	     length != mp->m_ialloc_blks) {
 		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count 2");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	/*
@@ -3389,7 +3403,7 @@
 		xfs_warn(log->l_mp, "%s: invalid item type (%d)",
 			__func__, ITEM_TYPE(item));
 		ASSERT(0);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 }
 
@@ -3425,7 +3439,7 @@
 		xfs_warn(log->l_mp, "%s: invalid item type (%d)",
 			__func__, ITEM_TYPE(item));
 		ASSERT(0);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 }
 
@@ -3560,7 +3574,7 @@
 
 	/* check the log format matches our own - else we can't recover */
 	if (xlog_header_check_recover(log->l_mp, rhead))
-		return (XFS_ERROR(EIO));
+		return -EIO;
 
 	while ((dp < lp) && num_logops) {
 		ASSERT(dp + sizeof(xlog_op_header_t) <= lp);
@@ -3571,7 +3585,7 @@
 			xfs_warn(log->l_mp, "%s: bad clientid 0x%x",
 					__func__, ohead->oh_clientid);
 			ASSERT(0);
-			return (XFS_ERROR(EIO));
+			return -EIO;
 		}
 		tid = be32_to_cpu(ohead->oh_tid);
 		hash = XLOG_RHASH(tid);
@@ -3585,7 +3599,7 @@
 				xfs_warn(log->l_mp, "%s: bad length 0x%x",
 					__func__, be32_to_cpu(ohead->oh_len));
 				WARN_ON(1);
-				return (XFS_ERROR(EIO));
+				return -EIO;
 			}
 			flags = ohead->oh_flags & ~XLOG_END_TRANS;
 			if (flags & XLOG_WAS_CONT_TRANS)
@@ -3607,7 +3621,7 @@
 				xfs_warn(log->l_mp, "%s: bad transaction",
 					__func__);
 				ASSERT(0);
-				error = XFS_ERROR(EIO);
+				error = -EIO;
 				break;
 			case 0:
 			case XLOG_CONTINUE_TRANS:
@@ -3618,7 +3632,7 @@
 				xfs_warn(log->l_mp, "%s: bad flag 0x%x",
 					__func__, flags);
 				ASSERT(0);
-				error = XFS_ERROR(EIO);
+				error = -EIO;
 				break;
 			}
 			if (error) {
@@ -3669,7 +3683,7 @@
 			 */
 			set_bit(XFS_EFI_RECOVERED, &efip->efi_flags);
 			xfs_efi_release(efip, efip->efi_format.efi_nextents);
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 	}
 
@@ -3969,7 +3983,7 @@
 		 * CRC protection by punting an error back up the stack.
 		 */
 		if (xfs_sb_version_hascrc(&log->l_mp->m_sb))
-			return EFSCORRUPTED;
+			return -EFSCORRUPTED;
 	}
 
 	return 0;
@@ -4018,14 +4032,14 @@
 	if (unlikely(rhead->h_magicno != cpu_to_be32(XLOG_HEADER_MAGIC_NUM))) {
 		XFS_ERROR_REPORT("xlog_valid_rec_header(1)",
 				XFS_ERRLEVEL_LOW, log->l_mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	if (unlikely(
 	    (!rhead->h_version ||
 	    (be32_to_cpu(rhead->h_version) & (~XLOG_VERSION_OKBITS))))) {
 		xfs_warn(log->l_mp, "%s: unrecognised log version (%d).",
 			__func__, be32_to_cpu(rhead->h_version));
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	/* LR body must have data or it wouldn't have been written */
@@ -4033,12 +4047,12 @@
 	if (unlikely( hlen <= 0 || hlen > INT_MAX )) {
 		XFS_ERROR_REPORT("xlog_valid_rec_header(2)",
 				XFS_ERRLEVEL_LOW, log->l_mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) {
 		XFS_ERROR_REPORT("xlog_valid_rec_header(3)",
 				XFS_ERRLEVEL_LOW, log->l_mp);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -4081,7 +4095,7 @@
 		 */
 		hbp = xlog_get_bp(log, 1);
 		if (!hbp)
-			return ENOMEM;
+			return -ENOMEM;
 
 		error = xlog_bread(log, tail_blk, 1, hbp, &offset);
 		if (error)
@@ -4110,11 +4124,11 @@
 	}
 
 	if (!hbp)
-		return ENOMEM;
+		return -ENOMEM;
 	dbp = xlog_get_bp(log, BTOBB(h_size));
 	if (!dbp) {
 		xlog_put_bp(hbp);
-		return ENOMEM;
+		return -ENOMEM;
 	}
 
 	memset(rhash, 0, sizeof(rhash));
@@ -4388,7 +4402,7 @@
 	 * If IO errors happened during recovery, bail out.
 	 */
 	if (XFS_FORCED_SHUTDOWN(log->l_mp)) {
-		return (EIO);
+		return -EIO;
 	}
 
 	/*
@@ -4415,7 +4429,7 @@
 
 	if (XFS_FORCED_SHUTDOWN(log->l_mp)) {
 		xfs_buf_relse(bp);
-		return XFS_ERROR(EIO);
+		return -EIO;
 	}
 
 	xfs_buf_iorequest(bp);
@@ -4492,7 +4506,7 @@
 "Please recover the log on a kernel that supports the unknown features.",
 				(log->l_mp->m_sb.sb_features_log_incompat &
 					XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN));
-			return EINVAL;
+			return -EINVAL;
 		}
 
 		xfs_notice(log->l_mp, "Starting recovery (logdev: %s)",
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 3507cd0..fbf0384 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -42,6 +42,7 @@
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_dinode.h"
+#include "xfs_sysfs.h"
 
 
 #ifdef HAVE_PERCPU_SB
@@ -60,6 +61,8 @@
 static int xfs_uuid_table_size;
 static uuid_t *xfs_uuid_table;
 
+extern struct kset *xfs_kset;
+
 /*
  * See if the UUID is unique among mounted XFS filesystems.
  * Mount fails if UUID is nil or a FS with the same UUID is already mounted.
@@ -76,7 +79,7 @@
 
 	if (uuid_is_nil(uuid)) {
 		xfs_warn(mp, "Filesystem has nil UUID - can't mount");
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	mutex_lock(&xfs_uuid_table_mutex);
@@ -104,7 +107,7 @@
  out_duplicate:
 	mutex_unlock(&xfs_uuid_table_mutex);
 	xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid);
-	return XFS_ERROR(EINVAL);
+	return -EINVAL;
 }
 
 STATIC void
@@ -173,13 +176,9 @@
 	ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
 	ASSERT(sbp->sb_blocklog >= BBSHIFT);
 
-#if XFS_BIG_BLKNOS     /* Limited by ULONG_MAX of page cache index */
+	/* Limited by ULONG_MAX of page cache index */
 	if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
-		return EFBIG;
-#else                  /* Limited by UINT_MAX of sectors */
-	if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX)
-		return EFBIG;
-#endif
+		return -EFBIG;
 	return 0;
 }
 
@@ -250,9 +249,9 @@
 		mp->m_flags &= ~XFS_MOUNT_32BITINODES;
 
 	if (mp->m_flags & XFS_MOUNT_32BITINODES)
-		index = xfs_set_inode32(mp);
+		index = xfs_set_inode32(mp, agcount);
 	else
-		index = xfs_set_inode64(mp);
+		index = xfs_set_inode64(mp, agcount);
 
 	if (maxagi)
 		*maxagi = index;
@@ -308,15 +307,15 @@
 	if (!bp) {
 		if (loud)
 			xfs_warn(mp, "SB buffer read failed");
-		return EIO;
+		return -EIO;
 	}
 	if (bp->b_error) {
 		error = bp->b_error;
 		if (loud)
 			xfs_warn(mp, "SB validate failed with error %d.", error);
 		/* bad CRC means corrupted metadata */
-		if (error == EFSBADCRC)
-			error = EFSCORRUPTED;
+		if (error == -EFSBADCRC)
+			error = -EFSCORRUPTED;
 		goto release_buf;
 	}
 
@@ -324,7 +323,6 @@
 	 * Initialize the mount structure from the superblock.
 	 */
 	xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
-	xfs_sb_quota_from_disk(sbp);
 
 	/*
 	 * If we haven't validated the superblock, do so now before we try
@@ -333,7 +331,7 @@
 	if (sbp->sb_magicnum != XFS_SB_MAGIC) {
 		if (loud)
 			xfs_warn(mp, "Invalid superblock magic number");
-		error = EINVAL;
+		error = -EINVAL;
 		goto release_buf;
 	}
 
@@ -344,7 +342,7 @@
 		if (loud)
 			xfs_warn(mp, "device supports %u byte sectors (not %u)",
 				sector_size, sbp->sb_sectsize);
-		error = ENOSYS;
+		error = -ENOSYS;
 		goto release_buf;
 	}
 
@@ -392,7 +390,7 @@
 			xfs_warn(mp,
 		"alignment check failed: sunit/swidth vs. blocksize(%d)",
 				sbp->sb_blocksize);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		} else {
 			/*
 			 * Convert the stripe unit and width to FSBs.
@@ -402,14 +400,14 @@
 				xfs_warn(mp,
 			"alignment check failed: sunit/swidth vs. agsize(%d)",
 					 sbp->sb_agblocks);
-				return XFS_ERROR(EINVAL);
+				return -EINVAL;
 			} else if (mp->m_dalign) {
 				mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
 			} else {
 				xfs_warn(mp,
 			"alignment check failed: sunit(%d) less than bsize(%d)",
 					 mp->m_dalign, sbp->sb_blocksize);
-				return XFS_ERROR(EINVAL);
+				return -EINVAL;
 			}
 		}
 
@@ -429,7 +427,7 @@
 		} else {
 			xfs_warn(mp,
 	"cannot change alignment: superblock does not support data alignment");
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 	} else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
 		    xfs_sb_version_hasdalign(&mp->m_sb)) {
@@ -556,14 +554,14 @@
 	d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
 	if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
 		xfs_warn(mp, "filesystem size mismatch detected");
-		return XFS_ERROR(EFBIG);
+		return -EFBIG;
 	}
 	bp = xfs_buf_read_uncached(mp->m_ddev_targp,
 					d - XFS_FSS_TO_BB(mp, 1),
 					XFS_FSS_TO_BB(mp, 1), 0, NULL);
 	if (!bp) {
 		xfs_warn(mp, "last sector read failed");
-		return EIO;
+		return -EIO;
 	}
 	xfs_buf_relse(bp);
 
@@ -571,14 +569,14 @@
 		d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
 		if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
 			xfs_warn(mp, "log size mismatch detected");
-			return XFS_ERROR(EFBIG);
+			return -EFBIG;
 		}
 		bp = xfs_buf_read_uncached(mp->m_logdev_targp,
 					d - XFS_FSB_TO_BB(mp, 1),
 					XFS_FSB_TO_BB(mp, 1), 0, NULL);
 		if (!bp) {
 			xfs_warn(mp, "log device read failed");
-			return EIO;
+			return -EIO;
 		}
 		xfs_buf_relse(bp);
 	}
@@ -731,10 +729,15 @@
 
 	xfs_set_maxicount(mp);
 
-	error = xfs_uuid_mount(mp);
+	mp->m_kobj.kobject.kset = xfs_kset;
+	error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname);
 	if (error)
 		goto out;
 
+	error = xfs_uuid_mount(mp);
+	if (error)
+		goto out_remove_sysfs;
+
 	/*
 	 * Set the minimum read and write sizes
 	 */
@@ -816,7 +819,7 @@
 	if (!sbp->sb_logblocks) {
 		xfs_warn(mp, "no log defined");
 		XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp);
-		error = XFS_ERROR(EFSCORRUPTED);
+		error = -EFSCORRUPTED;
 		goto out_free_perag;
 	}
 
@@ -855,7 +858,7 @@
 	     !mp->m_sb.sb_inprogress) {
 		error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
 		if (error)
-			goto out_fail_wait;
+			goto out_log_dealloc;
 	}
 
 	/*
@@ -876,7 +879,7 @@
 		xfs_iunlock(rip, XFS_ILOCK_EXCL);
 		XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW,
 				 mp);
-		error = XFS_ERROR(EFSCORRUPTED);
+		error = -EFSCORRUPTED;
 		goto out_rele_rip;
 	}
 	mp->m_rootip = rip;	/* save it */
@@ -927,7 +930,7 @@
 			xfs_notice(mp, "resetting quota flags");
 			error = xfs_mount_reset_sbqflags(mp);
 			if (error)
-				return error;
+				goto out_rtunmount;
 		}
 	}
 
@@ -989,6 +992,8 @@
 	xfs_da_unmount(mp);
  out_remove_uuid:
 	xfs_uuid_unmount(mp);
+ out_remove_sysfs:
+	xfs_sysfs_del(&mp->m_kobj);
  out:
 	return error;
 }
@@ -1071,6 +1076,8 @@
 	xfs_errortag_clearall(mp, 0);
 #endif
 	xfs_free_perag(mp);
+
+	xfs_sysfs_del(&mp->m_kobj);
 }
 
 int
@@ -1152,7 +1159,7 @@
 		lcounter += delta;
 		if (lcounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_icount = lcounter;
 		return 0;
@@ -1161,7 +1168,7 @@
 		lcounter += delta;
 		if (lcounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_ifree = lcounter;
 		return 0;
@@ -1191,7 +1198,7 @@
 			 * blocks if were allowed to.
 			 */
 			if (!rsvd)
-				return XFS_ERROR(ENOSPC);
+				return -ENOSPC;
 
 			lcounter = (long long)mp->m_resblks_avail + delta;
 			if (lcounter >= 0) {
@@ -1202,7 +1209,7 @@
 				"Filesystem \"%s\": reserve blocks depleted! "
 				"Consider increasing reserve pool size.",
 				mp->m_fsname);
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		}
 
 		mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
@@ -1211,7 +1218,7 @@
 		lcounter = (long long)mp->m_sb.sb_frextents;
 		lcounter += delta;
 		if (lcounter < 0) {
-			return XFS_ERROR(ENOSPC);
+			return -ENOSPC;
 		}
 		mp->m_sb.sb_frextents = lcounter;
 		return 0;
@@ -1220,7 +1227,7 @@
 		lcounter += delta;
 		if (lcounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_dblocks = lcounter;
 		return 0;
@@ -1229,7 +1236,7 @@
 		scounter += delta;
 		if (scounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_agcount = scounter;
 		return 0;
@@ -1238,7 +1245,7 @@
 		scounter += delta;
 		if (scounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_imax_pct = scounter;
 		return 0;
@@ -1247,7 +1254,7 @@
 		scounter += delta;
 		if (scounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_rextsize = scounter;
 		return 0;
@@ -1256,7 +1263,7 @@
 		scounter += delta;
 		if (scounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_rbmblocks = scounter;
 		return 0;
@@ -1265,7 +1272,7 @@
 		lcounter += delta;
 		if (lcounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_rblocks = lcounter;
 		return 0;
@@ -1274,7 +1281,7 @@
 		lcounter += delta;
 		if (lcounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_rextents = lcounter;
 		return 0;
@@ -1283,13 +1290,13 @@
 		scounter += delta;
 		if (scounter < 0) {
 			ASSERT(0);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 		mp->m_sb.sb_rextslog = scounter;
 		return 0;
 	default:
 		ASSERT(0);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 }
 
@@ -1452,7 +1459,7 @@
 	    (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) {
 		xfs_notice(mp, "%s required on read-only device.", message);
 		xfs_notice(mp, "write access unavailable, cannot proceed.");
-		return EROFS;
+		return -EROFS;
 	}
 	return 0;
 }
@@ -1995,7 +2002,7 @@
 	 * (e.g. lots of space just got freed). After that
 	 * we are done.
 	 */
-	if (ret != ENOSPC)
+	if (ret != -ENOSPC)
 		xfs_icsb_balance_counter(mp, field, 0);
 	xfs_icsb_unlock(mp);
 	return ret;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 7295a0b..b0447c8 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -166,6 +166,7 @@
 						   on the next remount,rw */
 	int64_t			m_low_space[XFS_LOWSP_MAX];
 						/* low free space thresholds */
+	struct xfs_kobj		m_kobj;
 
 	struct workqueue_struct	*m_data_workqueue;
 	struct workqueue_struct	*m_unwritten_workqueue;
diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c
index f99b493..1eb6f3d 100644
--- a/fs/xfs/xfs_mru_cache.c
+++ b/fs/xfs/xfs_mru_cache.c
@@ -337,20 +337,20 @@
 		*mrup = NULL;
 
 	if (!mrup || !grp_count || !lifetime_ms || !free_func)
-		return EINVAL;
+		return -EINVAL;
 
 	if (!(grp_time = msecs_to_jiffies(lifetime_ms) / grp_count))
-		return EINVAL;
+		return -EINVAL;
 
 	if (!(mru = kmem_zalloc(sizeof(*mru), KM_SLEEP)))
-		return ENOMEM;
+		return -ENOMEM;
 
 	/* An extra list is needed to avoid reaping up to a grp_time early. */
 	mru->grp_count = grp_count + 1;
 	mru->lists = kmem_zalloc(mru->grp_count * sizeof(*mru->lists), KM_SLEEP);
 
 	if (!mru->lists) {
-		err = ENOMEM;
+		err = -ENOMEM;
 		goto exit;
 	}
 
@@ -434,16 +434,16 @@
 
 	ASSERT(mru && mru->lists);
 	if (!mru || !mru->lists)
-		return EINVAL;
+		return -EINVAL;
 
 	if (radix_tree_preload(GFP_KERNEL))
-		return ENOMEM;
+		return -ENOMEM;
 
 	INIT_LIST_HEAD(&elem->list_node);
 	elem->key = key;
 
 	spin_lock(&mru->lock);
-	error = -radix_tree_insert(&mru->store, key, elem);
+	error = radix_tree_insert(&mru->store, key, elem);
 	radix_tree_preload_end();
 	if (!error)
 		_xfs_mru_cache_list_insert(mru, elem);
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 6d26759..1023210 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -98,18 +98,18 @@
 			next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
 
 			error = execute(batch[i], data);
-			if (error == EAGAIN) {
+			if (error == -EAGAIN) {
 				skipped++;
 				continue;
 			}
-			if (error && last_error != EFSCORRUPTED)
+			if (error && last_error != -EFSCORRUPTED)
 				last_error = error;
 		}
 
 		mutex_unlock(&qi->qi_tree_lock);
 
 		/* bail out if the filesystem is corrupted.  */
-		if (last_error == EFSCORRUPTED) {
+		if (last_error == -EFSCORRUPTED) {
 			skipped = 0;
 			break;
 		}
@@ -138,7 +138,7 @@
 	xfs_dqlock(dqp);
 	if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
 		xfs_dqunlock(dqp);
-		return EAGAIN;
+		return -EAGAIN;
 	}
 
 	dqp->dq_flags |= XFS_DQ_FREEING;
@@ -221,100 +221,6 @@
 	}
 }
 
-
-/*
- * This is called from xfs_mountfs to start quotas and initialize all
- * necessary data structures like quotainfo.  This is also responsible for
- * running a quotacheck as necessary.  We are guaranteed that the superblock
- * is consistently read in at this point.
- *
- * If we fail here, the mount will continue with quota turned off. We don't
- * need to inidicate success or failure at all.
- */
-void
-xfs_qm_mount_quotas(
-	xfs_mount_t	*mp)
-{
-	int		error = 0;
-	uint		sbf;
-
-	/*
-	 * If quotas on realtime volumes is not supported, we disable
-	 * quotas immediately.
-	 */
-	if (mp->m_sb.sb_rextents) {
-		xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
-		mp->m_qflags = 0;
-		goto write_changes;
-	}
-
-	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
-
-	/*
-	 * Allocate the quotainfo structure inside the mount struct, and
-	 * create quotainode(s), and change/rev superblock if necessary.
-	 */
-	error = xfs_qm_init_quotainfo(mp);
-	if (error) {
-		/*
-		 * We must turn off quotas.
-		 */
-		ASSERT(mp->m_quotainfo == NULL);
-		mp->m_qflags = 0;
-		goto write_changes;
-	}
-	/*
-	 * If any of the quotas are not consistent, do a quotacheck.
-	 */
-	if (XFS_QM_NEED_QUOTACHECK(mp)) {
-		error = xfs_qm_quotacheck(mp);
-		if (error) {
-			/* Quotacheck failed and disabled quotas. */
-			return;
-		}
-	}
-	/* 
-	 * If one type of quotas is off, then it will lose its
-	 * quotachecked status, since we won't be doing accounting for
-	 * that type anymore.
-	 */
-	if (!XFS_IS_UQUOTA_ON(mp))
-		mp->m_qflags &= ~XFS_UQUOTA_CHKD;
-	if (!XFS_IS_GQUOTA_ON(mp))
-		mp->m_qflags &= ~XFS_GQUOTA_CHKD;
-	if (!XFS_IS_PQUOTA_ON(mp))
-		mp->m_qflags &= ~XFS_PQUOTA_CHKD;
-
- write_changes:
-	/*
-	 * We actually don't have to acquire the m_sb_lock at all.
-	 * This can only be called from mount, and that's single threaded. XXX
-	 */
-	spin_lock(&mp->m_sb_lock);
-	sbf = mp->m_sb.sb_qflags;
-	mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
-	spin_unlock(&mp->m_sb_lock);
-
-	if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
-		if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
-			/*
-			 * We could only have been turning quotas off.
-			 * We aren't in very good shape actually because
-			 * the incore structures are convinced that quotas are
-			 * off, but the on disk superblock doesn't know that !
-			 */
-			ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
-			xfs_alert(mp, "%s: Superblock update failed!",
-				__func__);
-		}
-	}
-
-	if (error) {
-		xfs_warn(mp, "Failed to initialize disk quotas.");
-		return;
-	}
-}
-
 /*
  * Called from the vfsops layer.
  */
@@ -671,7 +577,7 @@
 
 	qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
 
-	error = -list_lru_init(&qinf->qi_lru);
+	error = list_lru_init(&qinf->qi_lru);
 	if (error)
 		goto out_free_qinf;
 
@@ -995,7 +901,7 @@
 		 * will leave a trace in the log indicating corruption has
 		 * been detected.
 		 */
-		if (error == EFSCORRUPTED) {
+		if (error == -EFSCORRUPTED) {
 			error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
 				      XFS_FSB_TO_DADDR(mp, bno),
 				      mp->m_quotainfo->qi_dqchunklen, 0, &bp,
@@ -1005,6 +911,12 @@
 		if (error)
 			break;
 
+		/*
+		 * A corrupt buffer might not have a verifier attached, so
+		 * make sure we have the correct one attached before writeback
+		 * occurs.
+		 */
+		bp->b_ops = &xfs_dquot_buf_ops;
 		xfs_qm_reset_dqcounts(mp, bp, firstid, type);
 		xfs_buf_delwri_queue(bp, buffer_list);
 		xfs_buf_relse(bp);
@@ -1090,7 +1002,7 @@
 					xfs_buf_readahead(mp->m_ddev_targp,
 					       XFS_FSB_TO_DADDR(mp, rablkno),
 					       mp->m_quotainfo->qi_dqchunklen,
-					       NULL);
+					       &xfs_dquot_buf_ops);
 					rablkno++;
 				}
 			}
@@ -1138,8 +1050,8 @@
 		/*
 		 * Shouldn't be able to turn off quotas here.
 		 */
-		ASSERT(error != ESRCH);
-		ASSERT(error != ENOENT);
+		ASSERT(error != -ESRCH);
+		ASSERT(error != -ENOENT);
 		return error;
 	}
 
@@ -1226,7 +1138,7 @@
 	 */
 	if (xfs_is_quota_inode(&mp->m_sb, ino)) {
 		*res = BULKSTAT_RV_NOTHING;
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	/*
@@ -1330,7 +1242,7 @@
  * Walk thru all the filesystem inodes and construct a consistent view
  * of the disk quota world. If the quotacheck fails, disable quotas.
  */
-int
+STATIC int
 xfs_qm_quotacheck(
 	xfs_mount_t	*mp)
 {
@@ -1463,7 +1375,100 @@
 		}
 	} else
 		xfs_notice(mp, "Quotacheck: Done.");
-	return (error);
+	return error;
+}
+
+/*
+ * This is called from xfs_mountfs to start quotas and initialize all
+ * necessary data structures like quotainfo.  This is also responsible for
+ * running a quotacheck as necessary.  We are guaranteed that the superblock
+ * is consistently read in at this point.
+ *
+ * If we fail here, the mount will continue with quota turned off. We don't
+ * need to inidicate success or failure at all.
+ */
+void
+xfs_qm_mount_quotas(
+	struct xfs_mount	*mp)
+{
+	int			error = 0;
+	uint			sbf;
+
+	/*
+	 * If quotas on realtime volumes is not supported, we disable
+	 * quotas immediately.
+	 */
+	if (mp->m_sb.sb_rextents) {
+		xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
+		mp->m_qflags = 0;
+		goto write_changes;
+	}
+
+	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
+
+	/*
+	 * Allocate the quotainfo structure inside the mount struct, and
+	 * create quotainode(s), and change/rev superblock if necessary.
+	 */
+	error = xfs_qm_init_quotainfo(mp);
+	if (error) {
+		/*
+		 * We must turn off quotas.
+		 */
+		ASSERT(mp->m_quotainfo == NULL);
+		mp->m_qflags = 0;
+		goto write_changes;
+	}
+	/*
+	 * If any of the quotas are not consistent, do a quotacheck.
+	 */
+	if (XFS_QM_NEED_QUOTACHECK(mp)) {
+		error = xfs_qm_quotacheck(mp);
+		if (error) {
+			/* Quotacheck failed and disabled quotas. */
+			return;
+		}
+	}
+	/*
+	 * If one type of quotas is off, then it will lose its
+	 * quotachecked status, since we won't be doing accounting for
+	 * that type anymore.
+	 */
+	if (!XFS_IS_UQUOTA_ON(mp))
+		mp->m_qflags &= ~XFS_UQUOTA_CHKD;
+	if (!XFS_IS_GQUOTA_ON(mp))
+		mp->m_qflags &= ~XFS_GQUOTA_CHKD;
+	if (!XFS_IS_PQUOTA_ON(mp))
+		mp->m_qflags &= ~XFS_PQUOTA_CHKD;
+
+ write_changes:
+	/*
+	 * We actually don't have to acquire the m_sb_lock at all.
+	 * This can only be called from mount, and that's single threaded. XXX
+	 */
+	spin_lock(&mp->m_sb_lock);
+	sbf = mp->m_sb.sb_qflags;
+	mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
+	spin_unlock(&mp->m_sb_lock);
+
+	if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
+		if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
+			/*
+			 * We could only have been turning quotas off.
+			 * We aren't in very good shape actually because
+			 * the incore structures are convinced that quotas are
+			 * off, but the on disk superblock doesn't know that !
+			 */
+			ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
+			xfs_alert(mp, "%s: Superblock update failed!",
+				__func__);
+		}
+	}
+
+	if (error) {
+		xfs_warn(mp, "Failed to initialize disk quotas.");
+		return;
+	}
 }
 
 /*
@@ -1493,7 +1498,7 @@
 			error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 					     0, 0, &uip);
 			if (error)
-				return XFS_ERROR(error);
+				return error;
 		}
 		if (XFS_IS_GQUOTA_ON(mp) &&
 		    mp->m_sb.sb_gquotino != NULLFSINO) {
@@ -1563,7 +1568,7 @@
 		IRELE(gip);
 	if (pip)
 		IRELE(pip);
-	return XFS_ERROR(error);
+	return error;
 }
 
 STATIC void
@@ -1679,7 +1684,7 @@
 						 XFS_QMOPT_DOWARN,
 						 &uq);
 			if (error) {
-				ASSERT(error != ENOENT);
+				ASSERT(error != -ENOENT);
 				return error;
 			}
 			/*
@@ -1706,7 +1711,7 @@
 						 XFS_QMOPT_DOWARN,
 						 &gq);
 			if (error) {
-				ASSERT(error != ENOENT);
+				ASSERT(error != -ENOENT);
 				goto error_rele;
 			}
 			xfs_dqunlock(gq);
@@ -1726,7 +1731,7 @@
 						 XFS_QMOPT_DOWARN,
 						 &pq);
 			if (error) {
-				ASSERT(error != ENOENT);
+				ASSERT(error != -ENOENT);
 				goto error_rele;
 			}
 			xfs_dqunlock(pq);
@@ -1895,7 +1900,7 @@
 				-((xfs_qcnt_t)delblks), 0, blkflags);
 	}
 
-	return (0);
+	return 0;
 }
 
 int
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index 797fd46..3a07a93 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -157,7 +157,6 @@
 #define XFS_QM_RTBWARNLIMIT	5
 
 extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
-extern int		xfs_qm_quotacheck(struct xfs_mount *);
 extern int		xfs_qm_write_sb_changes(struct xfs_mount *, __int64_t);
 
 /* dquot stuff */
diff --git a/fs/xfs/xfs_qm_bhv.c b/fs/xfs/xfs_qm_bhv.c
index e9be63a..2c61e61 100644
--- a/fs/xfs/xfs_qm_bhv.c
+++ b/fs/xfs/xfs_qm_bhv.c
@@ -117,7 +117,7 @@
 			(uquotaondisk ? " usrquota" : ""),
 			(gquotaondisk ? " grpquota" : ""),
 			(pquotaondisk ? " prjquota" : ""));
-		return XFS_ERROR(EPERM);
+		return -EPERM;
 	}
 
 	if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index bbc813c..80f2d77 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -64,10 +64,10 @@
 	/*
 	 * No file system can have quotas enabled on disk but not in core.
 	 * Note that quota utilities (like quotaoff) _expect_
-	 * errno == EEXIST here.
+	 * errno == -EEXIST here.
 	 */
 	if ((mp->m_qflags & flags) == 0)
-		return XFS_ERROR(EEXIST);
+		return -EEXIST;
 	error = 0;
 
 	flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
@@ -94,7 +94,7 @@
 
 		/* XXX what to do if error ? Revert back to old vals incore ? */
 		error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
-		return (error);
+		return error;
 	}
 
 	dqtype = 0;
@@ -198,7 +198,7 @@
 	if (mp->m_qflags == 0) {
 		mutex_unlock(&q->qi_quotaofflock);
 		xfs_qm_destroy_quotainfo(mp);
-		return (0);
+		return 0;
 	}
 
 	/*
@@ -278,13 +278,13 @@
 	xfs_mount_t	*mp,
 	uint		flags)
 {
-	int		error = EINVAL;
+	int		error = -EINVAL;
 
 	if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0 ||
 	    (flags & ~XFS_DQ_ALLTYPES)) {
 		xfs_debug(mp, "%s: flags=%x m_qflags=%x",
 			__func__, flags, mp->m_qflags);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	if (flags & XFS_DQ_USER) {
@@ -328,7 +328,7 @@
 	if (flags == 0) {
 		xfs_debug(mp, "%s: zero flags, m_qflags=%x",
 			__func__, mp->m_qflags);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	/* No fs can turn on quotas with a delayed effect */
@@ -351,13 +351,13 @@
 		xfs_debug(mp,
 			"%s: Can't enforce without acct, flags=%x sbflags=%x",
 			__func__, flags, mp->m_sb.sb_qflags);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	/*
 	 * If everything's up to-date incore, then don't waste time.
 	 */
 	if ((mp->m_qflags & flags) == flags)
-		return XFS_ERROR(EEXIST);
+		return -EEXIST;
 
 	/*
 	 * Change sb_qflags on disk but not incore mp->qflags
@@ -372,11 +372,11 @@
 	 * There's nothing to change if it's the same.
 	 */
 	if ((qf & flags) == flags && sbflags == 0)
-		return XFS_ERROR(EEXIST);
+		return -EEXIST;
 	sbflags |= XFS_SB_QFLAGS;
 
 	if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
-		return (error);
+		return error;
 	/*
 	 * If we aren't trying to switch on quota enforcement, we are done.
 	 */
@@ -387,10 +387,10 @@
 	     ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 	     (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 	    (flags & XFS_ALL_QUOTA_ENFD) == 0)
-		return (0);
+		return 0;
 
 	if (! XFS_IS_QUOTA_RUNNING(mp))
-		return XFS_ERROR(ESRCH);
+		return -ESRCH;
 
 	/*
 	 * Switch on quota enforcement in core.
@@ -399,7 +399,7 @@
 	mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 	mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
 
-	return (0);
+	return 0;
 }
 
 
@@ -426,7 +426,7 @@
 	if (!xfs_sb_version_hasquota(&mp->m_sb)) {
 		out->qs_uquota.qfs_ino = NULLFSINO;
 		out->qs_gquota.qfs_ino = NULLFSINO;
-		return (0);
+		return 0;
 	}
 
 	out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
@@ -514,7 +514,7 @@
 		out->qs_uquota.qfs_ino = NULLFSINO;
 		out->qs_gquota.qfs_ino = NULLFSINO;
 		out->qs_pquota.qfs_ino = NULLFSINO;
-		return (0);
+		return 0;
 	}
 
 	out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
@@ -595,7 +595,7 @@
 	xfs_qcnt_t		hard, soft;
 
 	if (newlim->d_fieldmask & ~XFS_DQ_MASK)
-		return EINVAL;
+		return -EINVAL;
 	if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
 		return 0;
 
@@ -615,7 +615,7 @@
 	 */
 	error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp);
 	if (error) {
-		ASSERT(error != ENOENT);
+		ASSERT(error != -ENOENT);
 		goto out_unlock;
 	}
 	xfs_dqunlock(dqp);
@@ -758,7 +758,7 @@
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_equotaoff, 0, 0);
 	if (error) {
 		xfs_trans_cancel(tp, 0);
-		return (error);
+		return error;
 	}
 
 	qoffi = xfs_trans_get_qoff_item(tp, startqoff,
@@ -772,7 +772,7 @@
 	 */
 	xfs_trans_set_sync(tp);
 	error = xfs_trans_commit(tp, 0);
-	return (error);
+	return error;
 }
 
 
@@ -822,7 +822,7 @@
 		spin_unlock(&mp->m_sb_lock);
 	}
 	*qoffstartp = qoffi;
-	return (error);
+	return error;
 }
 
 
@@ -850,7 +850,7 @@
 	 * our utility programs are concerned.
 	 */
 	if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
-		error = XFS_ERROR(ENOENT);
+		error = -ENOENT;
 		goto out_put;
 	}
 
@@ -953,7 +953,7 @@
 		uflags |= FS_QUOTA_GDQ_ENFD;
 	if (flags & XFS_PQUOTA_ENFD)
 		uflags |= FS_QUOTA_PDQ_ENFD;
-	return (uflags);
+	return uflags;
 }
 
 
diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index 2ad1b98..b238027 100644
--- a/fs/xfs/xfs_quotaops.c
+++ b/fs/xfs/xfs_quotaops.c
@@ -51,7 +51,7 @@
 
 	if (!XFS_IS_QUOTA_RUNNING(mp))
 		return -ENOSYS;
-	return -xfs_qm_scall_getqstat(mp, fqs);
+	return xfs_qm_scall_getqstat(mp, fqs);
 }
 
 STATIC int
@@ -63,7 +63,7 @@
 
 	if (!XFS_IS_QUOTA_RUNNING(mp))
 		return -ENOSYS;
-	return -xfs_qm_scall_getqstatv(mp, fqs);
+	return xfs_qm_scall_getqstatv(mp, fqs);
 }
 
 STATIC int
@@ -95,11 +95,11 @@
 
 	switch (op) {
 	case Q_XQUOTAON:
-		return -xfs_qm_scall_quotaon(mp, flags);
+		return xfs_qm_scall_quotaon(mp, flags);
 	case Q_XQUOTAOFF:
 		if (!XFS_IS_QUOTA_ON(mp))
 			return -EINVAL;
-		return -xfs_qm_scall_quotaoff(mp, flags);
+		return xfs_qm_scall_quotaoff(mp, flags);
 	}
 
 	return -EINVAL;
@@ -112,7 +112,7 @@
 {
 	struct xfs_mount	*mp = XFS_M(sb);
 	unsigned int		flags = 0;
-	
+
 	if (sb->s_flags & MS_RDONLY)
 		return -EROFS;
 
@@ -123,11 +123,11 @@
 		flags |= XFS_DQ_USER;
 	if (uflags & FS_GROUP_QUOTA)
 		flags |= XFS_DQ_GROUP;
-	if (uflags & FS_USER_QUOTA)
+	if (uflags & FS_PROJ_QUOTA)
 		flags |= XFS_DQ_PROJ;
 
-	return -xfs_qm_scall_trunc_qfiles(mp, flags);
-}	
+	return xfs_qm_scall_trunc_qfiles(mp, flags);
+}
 
 STATIC int
 xfs_fs_get_dqblk(
@@ -142,7 +142,7 @@
 	if (!XFS_IS_QUOTA_ON(mp))
 		return -ESRCH;
 
-	return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
+	return xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 				      xfs_quota_type(qid.type), fdq);
 }
 
@@ -161,7 +161,7 @@
 	if (!XFS_IS_QUOTA_ON(mp))
 		return -ESRCH;
 
-	return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
+	return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 				     xfs_quota_type(qid.type), fdq);
 }
 
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index ec5ca65..909e143 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -863,7 +863,7 @@
 					XFS_BMAPI_METADATA, &firstblock,
 					resblks, &map, &nmap, &flist);
 		if (!error && nmap < 1)
-			error = XFS_ERROR(ENOSPC);
+			error = -ENOSPC;
 		if (error)
 			goto error_cancel;
 		/*
@@ -903,7 +903,7 @@
 			bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
 				mp->m_bsize, 0);
 			if (bp == NULL) {
-				error = XFS_ERROR(EIO);
+				error = -EIO;
 error_cancel:
 				xfs_trans_cancel(tp, cancelflags);
 				goto error;
@@ -944,9 +944,9 @@
 	xfs_buf_t	*bp;		/* temporary buffer */
 	int		error;		/* error return value */
 	xfs_mount_t	*nmp;		/* new (fake) mount structure */
-	xfs_drfsbno_t	nrblocks;	/* new number of realtime blocks */
+	xfs_rfsblock_t	nrblocks;	/* new number of realtime blocks */
 	xfs_extlen_t	nrbmblocks;	/* new number of rt bitmap blocks */
-	xfs_drtbno_t	nrextents;	/* new number of realtime extents */
+	xfs_rtblock_t	nrextents;	/* new number of realtime extents */
 	uint8_t		nrextslog;	/* new log2 of sb_rextents */
 	xfs_extlen_t	nrsumblocks;	/* new number of summary blocks */
 	uint		nrsumlevels;	/* new rt summary levels */
@@ -962,11 +962,11 @@
 	 * Initial error checking.
 	 */
 	if (!capable(CAP_SYS_ADMIN))
-		return XFS_ERROR(EPERM);
+		return -EPERM;
 	if (mp->m_rtdev_targp == NULL || mp->m_rbmip == NULL ||
 	    (nrblocks = in->newblocks) <= sbp->sb_rblocks ||
 	    (sbp->sb_rblocks && (in->extsize != sbp->sb_rextsize)))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	if ((error = xfs_sb_validate_fsb_count(sbp, nrblocks)))
 		return error;
 	/*
@@ -976,7 +976,7 @@
 				XFS_FSB_TO_BB(mp, nrblocks - 1),
 				XFS_FSB_TO_BB(mp, 1), 0, NULL);
 	if (!bp)
-		return EIO;
+		return -EIO;
 	if (bp->b_error) {
 		error = bp->b_error;
 		xfs_buf_relse(bp);
@@ -1001,7 +1001,7 @@
 	 * since we'll log basically the whole summary file at once.
 	 */
 	if (nrsumblocks > (mp->m_sb.sb_logblocks >> 1))
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	/*
 	 * Get the old block counts for bitmap and summary inodes.
 	 * These can't change since other growfs callers are locked out.
@@ -1208,7 +1208,7 @@
 				len, &sumbp, &sb, prod, &r);
 		break;
 	default:
-		error = EIO;
+		error = -EIO;
 		ASSERT(0);
 	}
 	if (error)
@@ -1247,7 +1247,7 @@
 	if (mp->m_rtdev_targp == NULL) {
 		xfs_warn(mp,
 	"Filesystem has a realtime volume, use rtdev=device option");
-		return XFS_ERROR(ENODEV);
+		return -ENODEV;
 	}
 	mp->m_rsumlevels = sbp->sb_rextslog + 1;
 	mp->m_rsumsize =
@@ -1263,7 +1263,7 @@
 		xfs_warn(mp, "realtime mount -- %llu != %llu",
 			(unsigned long long) XFS_BB_TO_FSB(mp, d),
 			(unsigned long long) mp->m_sb.sb_rblocks);
-		return XFS_ERROR(EFBIG);
+		return -EFBIG;
 	}
 	bp = xfs_buf_read_uncached(mp->m_rtdev_targp,
 					d - XFS_FSB_TO_BB(mp, 1),
@@ -1272,7 +1272,7 @@
 		xfs_warn(mp, "realtime device size check failed");
 		if (bp)
 			xfs_buf_relse(bp);
-		return EIO;
+		return -EIO;
 	}
 	xfs_buf_relse(bp);
 	return 0;
diff --git a/fs/xfs/xfs_rtalloc.h b/fs/xfs/xfs_rtalloc.h
index 752b63d..c642795 100644
--- a/fs/xfs/xfs_rtalloc.h
+++ b/fs/xfs/xfs_rtalloc.h
@@ -132,7 +132,7 @@
 		return 0;
 
 	xfs_warn(mp, "Not built with CONFIG_XFS_RT");
-	return ENOSYS;
+	return -ENOSYS;
 }
 # define xfs_rtmount_inodes(m)  (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
 # define xfs_rtunmount_inodes(m)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 8f0333b..b194652 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -61,6 +61,7 @@
 static const struct super_operations xfs_super_operations;
 static kmem_zone_t *xfs_ioend_zone;
 mempool_t *xfs_ioend_pool;
+struct kset *xfs_kset;
 
 #define MNTOPT_LOGBUFS	"logbufs"	/* number of XFS log buffers */
 #define MNTOPT_LOGBSIZE	"logbsize"	/* size of XFS log buffers */
@@ -185,7 +186,7 @@
 	 */
 	mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
 	if (!mp->m_fsname)
-		return ENOMEM;
+		return -ENOMEM;
 	mp->m_fsname_len = strlen(mp->m_fsname) + 1;
 
 	/*
@@ -204,9 +205,6 @@
 	 */
 	mp->m_flags |= XFS_MOUNT_BARRIER;
 	mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
-#if !XFS_BIG_INUMS
-	mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
-#endif
 
 	/*
 	 * These can be overridden by the mount option parsing.
@@ -227,57 +225,57 @@
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (kstrtoint(value, 10, &mp->m_logbufs))
-				return EINVAL;
+				return -EINVAL;
 		} else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
-				return EINVAL;
+				return -EINVAL;
 		} else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 			if (!mp->m_logname)
-				return ENOMEM;
+				return -ENOMEM;
 		} else if (!strcmp(this_char, MNTOPT_MTPT)) {
 			xfs_warn(mp, "%s option not allowed on this system",
 				this_char);
-			return EINVAL;
+			return -EINVAL;
 		} else if (!strcmp(this_char, MNTOPT_RTDEV)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
 			if (!mp->m_rtname)
-				return ENOMEM;
+				return -ENOMEM;
 		} else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (kstrtoint(value, 10, &iosize))
-				return EINVAL;
+				return -EINVAL;
 			iosizelog = ffs(iosize) - 1;
 		} else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (suffix_kstrtoint(value, 10, &iosize))
-				return EINVAL;
+				return -EINVAL;
 			iosizelog = ffs(iosize) - 1;
 		} else if (!strcmp(this_char, MNTOPT_GRPID) ||
 			   !strcmp(this_char, MNTOPT_BSDGROUPS)) {
@@ -297,27 +295,22 @@
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (kstrtoint(value, 10, &dsunit))
-				return EINVAL;
+				return -EINVAL;
 		} else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
 			if (!value || !*value) {
 				xfs_warn(mp, "%s option requires an argument",
 					this_char);
-				return EINVAL;
+				return -EINVAL;
 			}
 			if (kstrtoint(value, 10, &dswidth))
-				return EINVAL;
+				return -EINVAL;
 		} else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
 			mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
 		} else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
 			mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
-#if !XFS_BIG_INUMS
-			xfs_warn(mp, "%s option not allowed on this system",
-				this_char);
-			return EINVAL;
-#endif
 		} else if (!strcmp(this_char, MNTOPT_NOUUID)) {
 			mp->m_flags |= XFS_MOUNT_NOUUID;
 		} else if (!strcmp(this_char, MNTOPT_BARRIER)) {
@@ -390,7 +383,7 @@
 	"irixsgid is now a sysctl(2) variable, option is deprecated.");
 		} else {
 			xfs_warn(mp, "unknown mount option [%s].", this_char);
-			return EINVAL;
+			return -EINVAL;
 		}
 	}
 
@@ -400,32 +393,32 @@
 	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
 	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
 		xfs_warn(mp, "no-recovery mounts must be read-only.");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
 		xfs_warn(mp,
 	"sunit and swidth options incompatible with the noalign option");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 #ifndef CONFIG_XFS_QUOTA
 	if (XFS_IS_QUOTA_RUNNING(mp)) {
 		xfs_warn(mp, "quota support not available in this kernel.");
-		return EINVAL;
+		return -EINVAL;
 	}
 #endif
 
 	if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
 		xfs_warn(mp, "sunit and swidth must be specified together");
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	if (dsunit && (dswidth % dsunit != 0)) {
 		xfs_warn(mp,
 	"stripe width (%d) must be a multiple of the stripe unit (%d)",
 			dswidth, dsunit);
-		return EINVAL;
+		return -EINVAL;
 	}
 
 done:
@@ -446,7 +439,7 @@
 	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
 		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
 			mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 	if (mp->m_logbsize != -1 &&
 	    mp->m_logbsize !=  0 &&
@@ -456,7 +449,7 @@
 		xfs_warn(mp,
 			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
 			mp->m_logbsize);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	if (iosizelog) {
@@ -465,7 +458,7 @@
 			xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
 				iosizelog, XFS_MIN_IO_LOG,
 				XFS_MAX_IO_LOG);
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 
 		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
@@ -597,15 +590,20 @@
 	return (((__uint64_t)pagefactor) << bitshift) - 1;
 }
 
+/*
+ * xfs_set_inode32() and xfs_set_inode64() are passed an agcount
+ * because in the growfs case, mp->m_sb.sb_agcount is not updated
+ * yet to the potentially higher ag count.
+ */
 xfs_agnumber_t
-xfs_set_inode32(struct xfs_mount *mp)
+xfs_set_inode32(struct xfs_mount *mp, xfs_agnumber_t agcount)
 {
 	xfs_agnumber_t	index = 0;
 	xfs_agnumber_t	maxagi = 0;
 	xfs_sb_t	*sbp = &mp->m_sb;
 	xfs_agnumber_t	max_metadata;
-	xfs_agino_t	agino =	XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0);
-	xfs_ino_t	ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino);
+	xfs_agino_t	agino;
+	xfs_ino_t	ino;
 	xfs_perag_t	*pag;
 
 	/* Calculate how much should be reserved for inodes to meet
@@ -620,10 +618,12 @@
 		do_div(icount, sbp->sb_agblocks);
 		max_metadata = icount;
 	} else {
-		max_metadata = sbp->sb_agcount;
+		max_metadata = agcount;
 	}
 
-	for (index = 0; index < sbp->sb_agcount; index++) {
+	agino =	XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
+
+	for (index = 0; index < agcount; index++) {
 		ino = XFS_AGINO_TO_INO(mp, index, agino);
 
 		if (ino > XFS_MAXINUMBER_32) {
@@ -648,11 +648,11 @@
 }
 
 xfs_agnumber_t
-xfs_set_inode64(struct xfs_mount *mp)
+xfs_set_inode64(struct xfs_mount *mp, xfs_agnumber_t agcount)
 {
 	xfs_agnumber_t index = 0;
 
-	for (index = 0; index < mp->m_sb.sb_agcount; index++) {
+	for (index = 0; index < agcount; index++) {
 		struct xfs_perag	*pag;
 
 		pag = xfs_perag_get(mp, index);
@@ -686,7 +686,7 @@
 		xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
 	}
 
-	return -error;
+	return error;
 }
 
 STATIC void
@@ -756,7 +756,7 @@
 		if (rtdev == ddev || rtdev == logdev) {
 			xfs_warn(mp,
 	"Cannot mount filesystem with identical rtdev and ddev/logdev.");
-			error = EINVAL;
+			error = -EINVAL;
 			goto out_close_rtdev;
 		}
 	}
@@ -764,7 +764,7 @@
 	/*
 	 * Setup xfs_mount buffer target pointers
 	 */
-	error = ENOMEM;
+	error = -ENOMEM;
 	mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
 	if (!mp->m_ddev_targp)
 		goto out_close_rtdev;
@@ -1188,6 +1188,7 @@
 	char			*options)
 {
 	struct xfs_mount	*mp = XFS_M(sb);
+	xfs_sb_t		*sbp = &mp->m_sb;
 	substring_t		args[MAX_OPT_ARGS];
 	char			*p;
 	int			error;
@@ -1208,10 +1209,10 @@
 			mp->m_flags &= ~XFS_MOUNT_BARRIER;
 			break;
 		case Opt_inode64:
-			mp->m_maxagi = xfs_set_inode64(mp);
+			mp->m_maxagi = xfs_set_inode64(mp, sbp->sb_agcount);
 			break;
 		case Opt_inode32:
-			mp->m_maxagi = xfs_set_inode32(mp);
+			mp->m_maxagi = xfs_set_inode32(mp, sbp->sb_agcount);
 			break;
 		default:
 			/*
@@ -1295,7 +1296,7 @@
 
 	xfs_save_resvblks(mp);
 	xfs_quiesce_attr(mp);
-	return -xfs_fs_log_dummy(mp);
+	return xfs_fs_log_dummy(mp);
 }
 
 STATIC int
@@ -1314,7 +1315,7 @@
 	struct seq_file		*m,
 	struct dentry		*root)
 {
-	return -xfs_showargs(XFS_M(root->d_sb), m);
+	return xfs_showargs(XFS_M(root->d_sb), m);
 }
 
 /*
@@ -1336,14 +1337,14 @@
 			   mp->m_logbsize < mp->m_sb.sb_logsunit) {
 			xfs_warn(mp,
 		"logbuf size must be greater than or equal to log stripe size");
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 	} else {
 		/* Fail a mount if the logbuf is larger than 32K */
 		if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
 			xfs_warn(mp,
 		"logbuf size for version 1 logs must be 16K or 32K");
-			return XFS_ERROR(EINVAL);
+			return -EINVAL;
 		}
 	}
 
@@ -1355,7 +1356,7 @@
 		xfs_warn(mp,
 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
 			MNTOPT_NOATTR2, MNTOPT_ATTR2);
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	/*
@@ -1372,7 +1373,7 @@
 	if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
 		xfs_warn(mp,
 			"cannot mount a read-only filesystem as read-write");
-		return XFS_ERROR(EROFS);
+		return -EROFS;
 	}
 
 	if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
@@ -1380,7 +1381,7 @@
 	    !xfs_sb_version_has_pquotino(&mp->m_sb)) {
 		xfs_warn(mp,
 		  "Super block does not support project and group quota together");
-		return XFS_ERROR(EINVAL);
+		return -EINVAL;
 	}
 
 	return 0;
@@ -1394,7 +1395,7 @@
 {
 	struct inode		*root;
 	struct xfs_mount	*mp = NULL;
-	int			flags = 0, error = ENOMEM;
+	int			flags = 0, error = -ENOMEM;
 
 	mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
 	if (!mp)
@@ -1428,11 +1429,11 @@
 	if (error)
 		goto out_free_fsname;
 
-	error = -xfs_init_mount_workqueues(mp);
+	error = xfs_init_mount_workqueues(mp);
 	if (error)
 		goto out_close_devices;
 
-	error = -xfs_icsb_init_counters(mp);
+	error = xfs_icsb_init_counters(mp);
 	if (error)
 		goto out_destroy_workqueues;
 
@@ -1474,12 +1475,12 @@
 
 	root = igrab(VFS_I(mp->m_rootip));
 	if (!root) {
-		error = ENOENT;
+		error = -ENOENT;
 		goto out_unmount;
 	}
 	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		error = ENOMEM;
+		error = -ENOMEM;
 		goto out_unmount;
 	}
 
@@ -1499,7 +1500,7 @@
 	xfs_free_fsname(mp);
 	kfree(mp);
  out:
-	return -error;
+	return error;
 
  out_unmount:
 	xfs_filestream_unmount(mp);
@@ -1761,9 +1762,15 @@
 	if (error)
 		goto out_cleanup_procfs;
 
+	xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
+	if (!xfs_kset) {
+		error = -ENOMEM;
+		goto out_sysctl_unregister;;
+	}
+
 	error = xfs_qm_init();
 	if (error)
-		goto out_sysctl_unregister;
+		goto out_kset_unregister;
 
 	error = register_filesystem(&xfs_fs_type);
 	if (error)
@@ -1772,6 +1779,8 @@
 
  out_qm_exit:
 	xfs_qm_exit();
+ out_kset_unregister:
+	kset_unregister(xfs_kset);
  out_sysctl_unregister:
 	xfs_sysctl_unregister();
  out_cleanup_procfs:
@@ -1793,6 +1802,7 @@
 {
 	xfs_qm_exit();
 	unregister_filesystem(&xfs_fs_type);
+	kset_unregister(xfs_kset);
 	xfs_sysctl_unregister();
 	xfs_cleanup_procfs();
 	xfs_buf_terminate();
diff --git a/fs/xfs/xfs_super.h b/fs/xfs/xfs_super.h
index bbe3d15..2b830c2 100644
--- a/fs/xfs/xfs_super.h
+++ b/fs/xfs/xfs_super.h
@@ -44,16 +44,6 @@
 # define XFS_REALTIME_STRING
 #endif
 
-#if XFS_BIG_BLKNOS
-# if XFS_BIG_INUMS
-#  define XFS_BIGFS_STRING	"large block/inode numbers, "
-# else
-#  define XFS_BIGFS_STRING	"large block numbers, "
-# endif
-#else
-# define XFS_BIGFS_STRING
-#endif
-
 #ifdef DEBUG
 # define XFS_DBG_STRING		"debug"
 #else
@@ -64,7 +54,6 @@
 #define XFS_BUILD_OPTIONS	XFS_ACL_STRING \
 				XFS_SECURITY_STRING \
 				XFS_REALTIME_STRING \
-				XFS_BIGFS_STRING \
 				XFS_DBG_STRING /* DBG must be last */
 
 struct xfs_inode;
@@ -76,8 +65,8 @@
 
 extern void xfs_flush_inodes(struct xfs_mount *mp);
 extern void xfs_blkdev_issue_flush(struct xfs_buftarg *);
-extern xfs_agnumber_t xfs_set_inode32(struct xfs_mount *);
-extern xfs_agnumber_t xfs_set_inode64(struct xfs_mount *);
+extern xfs_agnumber_t xfs_set_inode32(struct xfs_mount *, xfs_agnumber_t agcount);
+extern xfs_agnumber_t xfs_set_inode64(struct xfs_mount *, xfs_agnumber_t agcount);
 
 extern const struct export_operations xfs_export_operations;
 extern const struct xattr_handler *xfs_xattr_handlers[];
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index d69363c..6a944a2 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -76,15 +76,15 @@
 		bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0,
 				  &xfs_symlink_buf_ops);
 		if (!bp)
-			return XFS_ERROR(ENOMEM);
+			return -ENOMEM;
 		error = bp->b_error;
 		if (error) {
 			xfs_buf_ioerror_alert(bp, __func__);
 			xfs_buf_relse(bp);
 
 			/* bad CRC means corrupted metadata */
-			if (error == EFSBADCRC)
-				error = EFSCORRUPTED;
+			if (error == -EFSBADCRC)
+				error = -EFSCORRUPTED;
 			goto out;
 		}
 		byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);
@@ -95,7 +95,7 @@
 		if (xfs_sb_version_hascrc(&mp->m_sb)) {
 			if (!xfs_symlink_hdr_ok(ip->i_ino, offset,
 							byte_cnt, bp)) {
-				error = EFSCORRUPTED;
+				error = -EFSCORRUPTED;
 				xfs_alert(mp,
 "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)",
 					offset, byte_cnt, ip->i_ino);
@@ -135,7 +135,7 @@
 	trace_xfs_readlink(ip);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	xfs_ilock(ip, XFS_ILOCK_SHARED);
 
@@ -148,7 +148,7 @@
 			 __func__, (unsigned long long) ip->i_ino,
 			 (long long) pathlen);
 		ASSERT(0);
-		error = XFS_ERROR(EFSCORRUPTED);
+		error = -EFSCORRUPTED;
 		goto out;
 	}
 
@@ -203,14 +203,14 @@
 	trace_xfs_symlink(dp, link_name);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	/*
 	 * Check component lengths of the target path name.
 	 */
 	pathlen = strlen(target_path);
 	if (pathlen >= MAXPATHLEN)      /* total string too long */
-		return XFS_ERROR(ENAMETOOLONG);
+		return -ENAMETOOLONG;
 
 	udqp = gdqp = NULL;
 	prid = xfs_get_initial_prid(dp);
@@ -238,7 +238,7 @@
 		fs_blocks = xfs_symlink_blocks(mp, pathlen);
 	resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
 	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, resblks, 0);
-	if (error == ENOSPC && fs_blocks == 0) {
+	if (error == -ENOSPC && fs_blocks == 0) {
 		resblks = 0;
 		error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, 0, 0);
 	}
@@ -254,7 +254,7 @@
 	 * Check whether the directory allows new symlinks or not.
 	 */
 	if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) {
-		error = XFS_ERROR(EPERM);
+		error = -EPERM;
 		goto error_return;
 	}
 
@@ -284,7 +284,7 @@
 	error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0,
 			       prid, resblks > 0, &ip, NULL);
 	if (error) {
-		if (error == ENOSPC)
+		if (error == -ENOSPC)
 			goto error_return;
 		goto error1;
 	}
@@ -348,7 +348,7 @@
 			bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
 					       BTOBB(byte_cnt), 0);
 			if (!bp) {
-				error = ENOMEM;
+				error = -ENOMEM;
 				goto error2;
 			}
 			bp->b_ops = &xfs_symlink_buf_ops;
@@ -489,7 +489,7 @@
 			XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
 			XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
 		if (!bp) {
-			error = ENOMEM;
+			error = -ENOMEM;
 			goto error_bmap_cancel;
 		}
 		xfs_trans_binval(tp, bp);
@@ -562,7 +562,7 @@
 	trace_xfs_inactive_symlink(ip);
 
 	if (XFS_FORCED_SHUTDOWN(mp))
-		return XFS_ERROR(EIO);
+		return -EIO;
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 
@@ -580,7 +580,7 @@
 			 __func__, (unsigned long long)ip->i_ino, pathlen);
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 		ASSERT(0);
-		return XFS_ERROR(EFSCORRUPTED);
+		return -EFSCORRUPTED;
 	}
 
 	if (ip->i_df.if_flags & XFS_IFINLINE) {
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
new file mode 100644
index 0000000..9835139
--- /dev/null
+++ b/fs/xfs/xfs_sysfs.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2014 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "xfs.h"
+#include "xfs_sysfs.h"
+#include "xfs_log_format.h"
+#include "xfs_log.h"
+#include "xfs_log_priv.h"
+
+struct xfs_sysfs_attr {
+	struct attribute attr;
+	ssize_t (*show)(char *buf, void *data);
+	ssize_t (*store)(const char *buf, size_t count, void *data);
+};
+
+static inline struct xfs_sysfs_attr *
+to_attr(struct attribute *attr)
+{
+	return container_of(attr, struct xfs_sysfs_attr, attr);
+}
+
+#define XFS_SYSFS_ATTR_RW(name) \
+	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name)
+#define XFS_SYSFS_ATTR_RO(name) \
+	static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name)
+
+#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr
+
+/*
+ * xfs_mount kobject. This currently has no attributes and thus no need for show
+ * and store helpers. The mp kobject serves as the per-mount parent object that
+ * is identified by the fsname under sysfs.
+ */
+
+struct kobj_type xfs_mp_ktype = {
+	.release = xfs_sysfs_release,
+};
+
+/* xlog */
+
+STATIC ssize_t
+log_head_lsn_show(
+	char	*buf,
+	void	*data)
+{
+	struct xlog *log = data;
+	int cycle;
+	int block;
+
+	spin_lock(&log->l_icloglock);
+	cycle = log->l_curr_cycle;
+	block = log->l_curr_block;
+	spin_unlock(&log->l_icloglock);
+
+	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
+}
+XFS_SYSFS_ATTR_RO(log_head_lsn);
+
+STATIC ssize_t
+log_tail_lsn_show(
+	char	*buf,
+	void	*data)
+{
+	struct xlog *log = data;
+	int cycle;
+	int block;
+
+	xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block);
+	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, block);
+}
+XFS_SYSFS_ATTR_RO(log_tail_lsn);
+
+STATIC ssize_t
+reserve_grant_head_show(
+	char	*buf,
+	void	*data)
+{
+	struct xlog *log = data;
+	int cycle;
+	int bytes;
+
+	xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes);
+	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
+}
+XFS_SYSFS_ATTR_RO(reserve_grant_head);
+
+STATIC ssize_t
+write_grant_head_show(
+	char	*buf,
+	void	*data)
+{
+	struct xlog *log = data;
+	int cycle;
+	int bytes;
+
+	xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes);
+	return snprintf(buf, PAGE_SIZE, "%d:%d\n", cycle, bytes);
+}
+XFS_SYSFS_ATTR_RO(write_grant_head);
+
+static struct attribute *xfs_log_attrs[] = {
+	ATTR_LIST(log_head_lsn),
+	ATTR_LIST(log_tail_lsn),
+	ATTR_LIST(reserve_grant_head),
+	ATTR_LIST(write_grant_head),
+	NULL,
+};
+
+static inline struct xlog *
+to_xlog(struct kobject *kobject)
+{
+	struct xfs_kobj *kobj = to_kobj(kobject);
+	return container_of(kobj, struct xlog, l_kobj);
+}
+
+STATIC ssize_t
+xfs_log_show(
+	struct kobject		*kobject,
+	struct attribute	*attr,
+	char			*buf)
+{
+	struct xlog *log = to_xlog(kobject);
+	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+	return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
+}
+
+STATIC ssize_t
+xfs_log_store(
+	struct kobject		*kobject,
+	struct attribute	*attr,
+	const char		*buf,
+	size_t			count)
+{
+	struct xlog *log = to_xlog(kobject);
+	struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+	return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
+}
+
+static struct sysfs_ops xfs_log_ops = {
+	.show = xfs_log_show,
+	.store = xfs_log_store,
+};
+
+struct kobj_type xfs_log_ktype = {
+	.release = xfs_sysfs_release,
+	.sysfs_ops = &xfs_log_ops,
+	.default_attrs = xfs_log_attrs,
+};
diff --git a/fs/xfs/xfs_sysfs.h b/fs/xfs/xfs_sysfs.h
new file mode 100644
index 0000000..54a2091
--- /dev/null
+++ b/fs/xfs/xfs_sysfs.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2014 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __XFS_SYSFS_H__
+#define __XFS_SYSFS_H__
+
+extern struct kobj_type xfs_mp_ktype;	/* xfs_mount */
+extern struct kobj_type xfs_log_ktype;	/* xlog */
+
+static inline struct xfs_kobj *
+to_kobj(struct kobject *kobject)
+{
+	return container_of(kobject, struct xfs_kobj, kobject);
+}
+
+static inline void
+xfs_sysfs_release(struct kobject *kobject)
+{
+	struct xfs_kobj *kobj = to_kobj(kobject);
+	complete(&kobj->complete);
+}
+
+static inline int
+xfs_sysfs_init(
+	struct xfs_kobj		*kobj,
+	struct kobj_type	*ktype,
+	struct xfs_kobj		*parent_kobj,
+	const char		*name)
+{
+	init_completion(&kobj->complete);
+	return kobject_init_and_add(&kobj->kobject, ktype,
+				    &parent_kobj->kobject, "%s", name);
+}
+
+static inline void
+xfs_sysfs_del(
+	struct xfs_kobj	*kobj)
+{
+	kobject_del(&kobj->kobject);
+	kobject_put(&kobj->kobject);
+	wait_for_completion(&kobj->complete);
+}
+
+#endif	/* __XFS_SYSFS_H__ */
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index d039325..30e8e34 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -190,7 +190,7 @@
 					  -((int64_t)blocks), rsvd);
 		if (error != 0) {
 			current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
-			return (XFS_ERROR(ENOSPC));
+			return -ENOSPC;
 		}
 		tp->t_blk_res += blocks;
 	}
@@ -241,7 +241,7 @@
 		error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
 					  -((int64_t)rtextents), rsvd);
 		if (error) {
-			error = XFS_ERROR(ENOSPC);
+			error = -ENOSPC;
 			goto undo_log;
 		}
 		tp->t_rtx_res += rtextents;
@@ -874,7 +874,7 @@
 		goto out_unreserve;
 
 	if (XFS_FORCED_SHUTDOWN(mp)) {
-		error = XFS_ERROR(EIO);
+		error = -EIO;
 		goto out_unreserve;
 	}
 
@@ -917,7 +917,7 @@
 	if (tp->t_ticket) {
 		commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
 		if (commit_lsn == -1 && !error)
-			error = XFS_ERROR(EIO);
+			error = -EIO;
 	}
 	current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
 	xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0);
@@ -1024,7 +1024,7 @@
 	 */
 	error = xfs_trans_commit(trans, 0);
 	if (error)
-		return (error);
+		return error;
 
 	trans = *tpp;
 
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index cb0f3a8..859482f 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -762,7 +762,7 @@
 
 	ailp = kmem_zalloc(sizeof(struct xfs_ail), KM_MAYFAIL);
 	if (!ailp)
-		return ENOMEM;
+		return -ENOMEM;
 
 	ailp->xa_mount = mp;
 	INIT_LIST_HEAD(&ailp->xa_ail);
@@ -781,7 +781,7 @@
 
 out_free_ailp:
 	kmem_free(ailp);
-	return ENOMEM;
+	return -ENOMEM;
 }
 
 void
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index b8eef05..96c898e 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -166,7 +166,7 @@
 		ASSERT(atomic_read(&bip->bli_refcount) > 0);
 		bip->bli_recur++;
 		trace_xfs_trans_get_buf_recur(bip);
-		return (bp);
+		return bp;
 	}
 
 	bp = xfs_buf_get_map(target, map, nmaps, flags);
@@ -178,7 +178,7 @@
 
 	_xfs_trans_bjoin(tp, bp, 1);
 	trace_xfs_trans_get_buf(bp->b_fspriv);
-	return (bp);
+	return bp;
 }
 
 /*
@@ -201,9 +201,8 @@
 	 * Default to just trying to lock the superblock buffer
 	 * if tp is NULL.
 	 */
-	if (tp == NULL) {
-		return (xfs_getsb(mp, flags));
-	}
+	if (tp == NULL)
+		return xfs_getsb(mp, flags);
 
 	/*
 	 * If the superblock buffer already has this transaction
@@ -218,7 +217,7 @@
 		ASSERT(atomic_read(&bip->bli_refcount) > 0);
 		bip->bli_recur++;
 		trace_xfs_trans_getsb_recur(bip);
-		return (bp);
+		return bp;
 	}
 
 	bp = xfs_getsb(mp, flags);
@@ -227,7 +226,7 @@
 
 	_xfs_trans_bjoin(tp, bp, 1);
 	trace_xfs_trans_getsb(bp->b_fspriv);
-	return (bp);
+	return bp;
 }
 
 #ifdef DEBUG
@@ -267,7 +266,7 @@
 		bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
 		if (!bp)
 			return (flags & XBF_TRYLOCK) ?
-					EAGAIN : XFS_ERROR(ENOMEM);
+					-EAGAIN : -ENOMEM;
 
 		if (bp->b_error) {
 			error = bp->b_error;
@@ -277,8 +276,8 @@
 			xfs_buf_relse(bp);
 
 			/* bad CRC means corrupted metadata */
-			if (error == EFSBADCRC)
-				error = EFSCORRUPTED;
+			if (error == -EFSBADCRC)
+				error = -EFSCORRUPTED;
 			return error;
 		}
 #ifdef DEBUG
@@ -287,7 +286,7 @@
 				if (((xfs_req_num++) % xfs_error_mod) == 0) {
 					xfs_buf_relse(bp);
 					xfs_debug(mp, "Returning error!");
-					return XFS_ERROR(EIO);
+					return -EIO;
 				}
 			}
 		}
@@ -343,8 +342,8 @@
 					xfs_force_shutdown(tp->t_mountp,
 							SHUTDOWN_META_IO_ERROR);
 				/* bad CRC means corrupted metadata */
-				if (error == EFSBADCRC)
-					error = EFSCORRUPTED;
+				if (error == -EFSBADCRC)
+					error = -EFSCORRUPTED;
 				return error;
 			}
 		}
@@ -355,7 +354,7 @@
 		if (XFS_FORCED_SHUTDOWN(mp)) {
 			trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
 			*bpp = NULL;
-			return XFS_ERROR(EIO);
+			return -EIO;
 		}
 
 
@@ -372,7 +371,7 @@
 	if (bp == NULL) {
 		*bpp = NULL;
 		return (flags & XBF_TRYLOCK) ?
-					0 : XFS_ERROR(ENOMEM);
+					0 : -ENOMEM;
 	}
 	if (bp->b_error) {
 		error = bp->b_error;
@@ -384,8 +383,8 @@
 		xfs_buf_relse(bp);
 
 		/* bad CRC means corrupted metadata */
-		if (error == EFSBADCRC)
-			error = EFSCORRUPTED;
+		if (error == -EFSBADCRC)
+			error = -EFSCORRUPTED;
 		return error;
 	}
 #ifdef DEBUG
@@ -396,7 +395,7 @@
 						   SHUTDOWN_META_IO_ERROR);
 				xfs_buf_relse(bp);
 				xfs_debug(mp, "Returning trans error!");
-				return XFS_ERROR(EIO);
+				return -EIO;
 			}
 		}
 	}
@@ -414,7 +413,7 @@
 	trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
 	xfs_buf_relse(bp);
 	*bpp = NULL;
-	return XFS_ERROR(EIO);
+	return -EIO;
 }
 
 /*
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index 4117286..846e061 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -722,8 +722,8 @@
 error_return:
 	xfs_dqunlock(dqp);
 	if (flags & XFS_QMOPT_ENOSPC)
-		return ENOSPC;
-	return EDQUOT;
+		return -ENOSPC;
+	return -EDQUOT;
 }
 
 
diff --git a/fs/xfs/xfs_types.h b/fs/xfs/xfs_types.h
index 65c6e66..b79dc66 100644
--- a/fs/xfs/xfs_types.h
+++ b/fs/xfs/xfs_types.h
@@ -38,43 +38,18 @@
 typedef	__uint32_t	xfs_dablk_t;	/* dir/attr block number (in file) */
 typedef	__uint32_t	xfs_dahash_t;	/* dir/attr hash value */
 
-/*
- * These types are 64 bits on disk but are either 32 or 64 bits in memory.
- * Disk based types:
- */
-typedef __uint64_t	xfs_dfsbno_t;	/* blockno in filesystem (agno|agbno) */
-typedef __uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
-typedef	__uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
-typedef	__uint64_t	xfs_dfiloff_t;	/* block number in a file */
-typedef	__uint64_t	xfs_dfilblks_t;	/* number of blocks in a file */
-
-/*
- * Memory based types are conditional.
- */
-#if XFS_BIG_BLKNOS
 typedef	__uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
 typedef __uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
 typedef __uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
-typedef	__int64_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
-#else
-typedef	__uint32_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
-typedef __uint32_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
-typedef __uint32_t	xfs_rtblock_t;	/* extent (block) in realtime area */
-typedef	__int32_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
-#endif
 typedef __uint64_t	xfs_fileoff_t;	/* block number in a file */
-typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
 typedef __uint64_t	xfs_filblks_t;	/* number of blocks in a file */
 
+typedef	__int64_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
+typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
 
 /*
  * Null values for the types.
  */
-#define	NULLDFSBNO	((xfs_dfsbno_t)-1)
-#define	NULLDRFSBNO	((xfs_drfsbno_t)-1)
-#define	NULLDRTBNO	((xfs_drtbno_t)-1)
-#define	NULLDFILOFF	((xfs_dfiloff_t)-1)
-
 #define	NULLFSBLOCK	((xfs_fsblock_t)-1)
 #define	NULLRFSBLOCK	((xfs_rfsblock_t)-1)
 #define	NULLRTBLOCK	((xfs_rtblock_t)-1)
diff --git a/fs/xfs/xfs_vnode.h b/fs/xfs/xfs_vnode.h
deleted file mode 100644
index e8a7738..0000000
--- a/fs/xfs/xfs_vnode.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (c) 2000-2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#ifndef __XFS_VNODE_H__
-#define __XFS_VNODE_H__
-
-#include "xfs_fs.h"
-
-struct file;
-struct xfs_inode;
-struct attrlist_cursor_kern;
-
-/*
- * Flags for read/write calls - same values as IRIX
- */
-#define IO_ISDIRECT	0x00004		/* bypass page cache */
-#define IO_INVIS	0x00020		/* don't update inode timestamps */
-
-#define XFS_IO_FLAGS \
-	{ IO_ISDIRECT,	"DIRECT" }, \
-	{ IO_INVIS,	"INVIS"}
-
-/*
- * Some useful predicates.
- */
-#define VN_MAPPED(vp)	mapping_mapped(vp->i_mapping)
-#define VN_CACHED(vp)	(vp->i_mapping->nrpages)
-#define VN_DIRTY(vp)	mapping_tagged(vp->i_mapping, \
-					PAGECACHE_TAG_DIRTY)
-
-
-#endif	/* __XFS_VNODE_H__ */
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 78ed92a..93455b9 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -49,7 +49,7 @@
 		value = NULL;
 	}
 
-	error = -xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags);
+	error = xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags);
 	if (error)
 		return error;
 	return asize;
@@ -71,8 +71,8 @@
 		xflags |= ATTR_REPLACE;
 
 	if (!value)
-		return -xfs_attr_remove(ip, (unsigned char *)name, xflags);
-	return -xfs_attr_set(ip, (unsigned char *)name,
+		return xfs_attr_remove(ip, (unsigned char *)name, xflags);
+	return xfs_attr_set(ip, (unsigned char *)name,
 				(void *)value, size, xflags);
 }
 
diff --git a/include/dt-bindings/dma/nbpfaxi.h b/include/dt-bindings/dma/nbpfaxi.h
new file mode 100644
index 0000000..c1a5b9e
--- /dev/null
+++ b/include/dt-bindings/dma/nbpfaxi.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
+ * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef DT_BINDINGS_NBPFAXI_H
+#define DT_BINDINGS_NBPFAXI_H
+
+/**
+ * Use "#dma-cells = <2>;" with the second integer defining slave DMA flags:
+ */
+#define NBPF_SLAVE_RQ_HIGH	1
+#define NBPF_SLAVE_RQ_LOW	2
+#define NBPF_SLAVE_RQ_LEVEL	4
+
+#endif
diff --git a/include/linux/acct.h b/include/linux/acct.h
index 4a5b7cb..dccc2d4 100644
--- a/include/linux/acct.h
+++ b/include/linux/acct.h
@@ -24,14 +24,10 @@
 struct pacct_struct;
 struct pid_namespace;
 extern int acct_parm[]; /* for sysctl */
-extern void acct_auto_close_mnt(struct vfsmount *m);
-extern void acct_auto_close(struct super_block *sb);
 extern void acct_collect(long exitcode, int group_dead);
 extern void acct_process(void);
 extern void acct_exit_ns(struct pid_namespace *);
 #else
-#define acct_auto_close_mnt(x)	do { } while (0)
-#define acct_auto_close(x)	do { } while (0)
 #define acct_collect(x,y)	do { } while (0)
 #define acct_process()		do { } while (0)
 #define acct_exit_ns(ns)	do { } while (0)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index d2633ee..b39e500 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -308,6 +308,7 @@
 
 	unsigned short		bip_slab;	/* slab the bip came from */
 	unsigned short		bip_vcnt;	/* # of integrity bio_vecs */
+	unsigned short		bip_max_vcnt;	/* integrity bio_vec slots */
 	unsigned		bip_owns_buf:1;	/* should free bip_buf */
 
 	struct work_struct	bip_work;	/* I/O completion */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 8699bcf..518b465 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -21,6 +21,7 @@
 #include <linux/bsg.h>
 #include <linux/smp.h>
 #include <linux/rcupdate.h>
+#include <linux/percpu-refcount.h>
 
 #include <asm/scatterlist.h>
 
@@ -470,6 +471,7 @@
 	struct mutex		sysfs_lock;
 
 	int			bypass_depth;
+	int			mq_freeze_depth;
 
 #if defined(CONFIG_BLK_DEV_BSG)
 	bsg_job_fn		*bsg_job_fn;
@@ -483,7 +485,7 @@
 #endif
 	struct rcu_head		rcu_head;
 	wait_queue_head_t	mq_freeze_wq;
-	struct percpu_counter	mq_usage_counter;
+	struct percpu_ref	mq_usage_counter;
 	struct list_head	all_q_node;
 
 	struct blk_mq_tag_set	*tag_set;
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index d21f2db..40ae58e 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -285,19 +285,9 @@
 
 extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags,
 				     bool can_fail);
-extern void ceph_msg_kfree(struct ceph_msg *m);
 
-
-static inline struct ceph_msg *ceph_msg_get(struct ceph_msg *msg)
-{
-	kref_get(&msg->kref);
-	return msg;
-}
-extern void ceph_msg_last_put(struct kref *kref);
-static inline void ceph_msg_put(struct ceph_msg *msg)
-{
-	kref_put(&msg->kref, ceph_msg_last_put);
-}
+extern struct ceph_msg *ceph_msg_get(struct ceph_msg *msg);
+extern void ceph_msg_put(struct ceph_msg *msg);
 
 extern void ceph_msg_dump(struct ceph_msg *msg);
 
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 94ec696..03aeb27 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -117,7 +117,7 @@
 	struct list_head r_req_lru_item;
 	struct list_head r_osd_item;
 	struct list_head r_linger_item;
-	struct list_head r_linger_osd;
+	struct list_head r_linger_osd_item;
 	struct ceph_osd *r_osd;
 	struct ceph_pg   r_pgid;
 	int              r_pg_osds[CEPH_PG_MAX_SIZE];
@@ -325,22 +325,14 @@
 
 extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
 					 struct ceph_osd_request *req);
-extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
-						struct ceph_osd_request *req);
 
-static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
-{
-	kref_get(&req->r_kref);
-}
-extern void ceph_osdc_release_request(struct kref *kref);
-static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
-{
-	kref_put(&req->r_kref, ceph_osdc_release_request);
-}
+extern void ceph_osdc_get_request(struct ceph_osd_request *req);
+extern void ceph_osdc_put_request(struct ceph_osd_request *req);
 
 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
 				   struct ceph_osd_request *req,
 				   bool nofail);
+extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
 				  struct ceph_osd_request *req);
 extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 3c7ec32..e4ae2ad 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -249,6 +249,7 @@
 extern struct dentry * d_add_ci(struct dentry *, struct inode *, struct qstr *);
 extern struct dentry *d_find_any_alias(struct inode *inode);
 extern struct dentry * d_obtain_alias(struct inode *);
+extern struct dentry * d_obtain_root(struct inode *);
 extern void shrink_dcache_sb(struct super_block *);
 extern void shrink_dcache_parent(struct dentry *);
 extern void shrink_dcache_for_umount(struct super_block *);
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 3d1c2aa..1f9e642 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -37,7 +37,6 @@
  */
 typedef s32 dma_cookie_t;
 #define DMA_MIN_COOKIE	1
-#define DMA_MAX_COOKIE	INT_MAX
 
 static inline int dma_submit_error(dma_cookie_t cookie)
 {
@@ -671,7 +670,7 @@
 	struct dma_async_tx_descriptor *(*device_prep_dma_cyclic)(
 		struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
-		unsigned long flags, void *context);
+		unsigned long flags);
 	struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
 		struct dma_chan *chan, struct dma_interleaved_template *xt,
 		unsigned long flags);
@@ -746,7 +745,7 @@
 		unsigned long flags)
 {
 	return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len,
-						period_len, dir, flags, NULL);
+						period_len, dir, flags);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index 3dbe9bd..debb70d 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -52,7 +52,7 @@
 #endif
 
 extern const char *drbd_buildtag(void);
-#define REL_VERSION "8.4.3"
+#define REL_VERSION "8.4.5"
 #define API_VERSION 1
 #define PRO_VERSION_MIN 86
 #define PRO_VERSION_MAX 101
@@ -245,7 +245,7 @@
 	D_DISKLESS,
 	D_ATTACHING,      /* In the process of reading the meta-data */
 	D_FAILED,         /* Becomes D_DISKLESS as soon as we told it the peer */
-			/* when >= D_FAILED it is legal to access mdev->bc */
+			  /* when >= D_FAILED it is legal to access mdev->ldev */
 	D_NEGOTIATING,    /* Late attaching state, we need to talk to the peer */
 	D_INCONSISTENT,
 	D_OUTDATED,
diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h
index 4193f5f..7b131ed 100644
--- a/include/linux/drbd_genl.h
+++ b/include/linux/drbd_genl.h
@@ -171,6 +171,10 @@
 	__flg_field(28, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,	tentative)
 	__flg_field_def(29,	DRBD_GENLA_F_MANDATORY,	use_rle, DRBD_USE_RLE_DEF)
 	/* 9: __u32_field_def(30,	DRBD_GENLA_F_MANDATORY,	fencing_policy, DRBD_FENCING_DEF) */
+	/* 9: __str_field_def(31,     DRBD_GENLA_F_MANDATORY, name, SHARED_SECRET_MAX) */
+	/* 9: __u32_field(32,         DRBD_F_REQUIRED | DRBD_F_INVARIANT,     peer_node_id) */
+	__flg_field_def(33, 0 /* OPTIONAL */,	csums_after_crash_only, DRBD_CSUMS_AFTER_CRASH_ONLY_DEF)
+	__u32_field_def(34, 0 /* OPTIONAL */, sock_check_timeo, DRBD_SOCKET_CHECK_TIMEO_DEF)
 )
 
 GENL_struct(DRBD_NLA_SET_ROLE_PARMS, 6, set_role_parms,
diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 17e50bb..8ac8c5d 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -214,6 +214,7 @@
 #define DRBD_ALLOW_TWO_PRIMARIES_DEF	0
 #define DRBD_ALWAYS_ASBP_DEF	0
 #define DRBD_USE_RLE_DEF	1
+#define DRBD_CSUMS_AFTER_CRASH_ONLY_DEF 0
 
 #define DRBD_AL_STRIPES_MIN     1
 #define DRBD_AL_STRIPES_MAX     1024
@@ -224,4 +225,9 @@
 #define DRBD_AL_STRIPE_SIZE_MAX   16777216
 #define DRBD_AL_STRIPE_SIZE_DEF   32
 #define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */
+
+#define DRBD_SOCKET_CHECK_TIMEO_MIN 0
+#define DRBD_SOCKET_CHECK_TIMEO_MAX DRBD_PING_TIMEO_MAX
+#define DRBD_SOCKET_CHECK_TIMEO_DEF 0
+#define DRBD_SOCKET_CHECK_TIMEO_SCALE '1'
 #endif
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f0890e4..9418772 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1275,6 +1275,7 @@
 
 	/* AIO completions deferred from interrupt context */
 	struct workqueue_struct *s_dio_done_wq;
+	struct hlist_head s_pins;
 
 	/*
 	 * Keep the lru lists last in the structure so they always sit on their
@@ -2360,6 +2361,7 @@
 
 extern int kernel_read(struct file *, loff_t, char *, unsigned long);
 extern ssize_t kernel_write(struct file *, const char *, size_t, loff_t);
+extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
 extern struct file * open_exec(const char *);
  
 /* fs/dcache.c -- generic fs support functions */
diff --git a/include/linux/fs_pin.h b/include/linux/fs_pin.h
new file mode 100644
index 0000000..f66525e
--- /dev/null
+++ b/include/linux/fs_pin.h
@@ -0,0 +1,17 @@
+#include <linux/fs.h>
+
+struct fs_pin {
+	atomic_long_t		count;
+	union {
+		struct {
+			struct hlist_node	s_list;
+			struct hlist_node	m_list;
+		};
+		struct rcu_head rcu;
+	};
+	void (*kill)(struct fs_pin *);
+};
+
+void pin_put(struct fs_pin *);
+void pin_remove(struct fs_pin *);
+void pin_insert(struct fs_pin *, struct vfsmount *);
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 4967916..d69f057 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -187,7 +187,6 @@
 }
 
 extern bool vlan_do_receive(struct sk_buff **skb);
-extern struct sk_buff *vlan_untag(struct sk_buff *skb);
 
 extern int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid);
 extern void vlan_vid_del(struct net_device *dev, __be16 proto, u16 vid);
@@ -241,11 +240,6 @@
 	return false;
 }
 
-static inline struct sk_buff *vlan_untag(struct sk_buff *skb)
-{
-	return skb;
-}
-
 static inline int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid)
 {
 	return 0;
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index c845036..379c026 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -116,6 +116,7 @@
 	/* special QP and management commands */
 	MLX4_CMD_CONF_SPECIAL_QP = 0x23,
 	MLX4_CMD_MAD_IFC	 = 0x24,
+	MLX4_CMD_MAD_DEMUX	 = 0x203,
 
 	/* multicast commands */
 	MLX4_CMD_READ_MCG	 = 0x25,
@@ -186,6 +187,12 @@
 };
 
 enum {
+	MLX4_CMD_MAD_DEMUX_CONFIG	= 0,
+	MLX4_CMD_MAD_DEMUX_QUERY_STATE	= 1,
+	MLX4_CMD_MAD_DEMUX_QUERY_RESTR	= 2, /* Query mad demux restrictions */
+};
+
+enum {
 	MLX4_CMD_WRAPPED,
 	MLX4_CMD_NATIVE
 };
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index e15b154..071f6b2 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -183,6 +183,7 @@
 	MLX4_DEV_CAP_FLAG2_UPDATE_QP		= 1LL <<  8,
 	MLX4_DEV_CAP_FLAG2_DMFS_IPOIB		= 1LL <<  9,
 	MLX4_DEV_CAP_FLAG2_VXLAN_OFFLOADS	= 1LL <<  10,
+	MLX4_DEV_CAP_FLAG2_MAD_DEMUX		= 1LL <<  11,
 };
 
 enum {
@@ -273,6 +274,7 @@
 	MLX4_PERM_REMOTE_WRITE	= 1 << 13,
 	MLX4_PERM_ATOMIC	= 1 << 14,
 	MLX4_PERM_BIND_MW	= 1 << 15,
+	MLX4_PERM_MASK		= 0xFC00
 };
 
 enum {
@@ -1254,6 +1256,21 @@
 int mlx4_vf_get_enable_smi_admin(struct mlx4_dev *dev, int slave, int port);
 int mlx4_vf_set_enable_smi_admin(struct mlx4_dev *dev, int slave, int port,
 				 int enable);
+int mlx4_mr_hw_get_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+		       struct mlx4_mpt_entry ***mpt_entry);
+int mlx4_mr_hw_write_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+			 struct mlx4_mpt_entry **mpt_entry);
+int mlx4_mr_hw_change_pd(struct mlx4_dev *dev, struct mlx4_mpt_entry *mpt_entry,
+			 u32 pdn);
+int mlx4_mr_hw_change_access(struct mlx4_dev *dev,
+			     struct mlx4_mpt_entry *mpt_entry,
+			     u32 access);
+void mlx4_mr_hw_put_mpt(struct mlx4_dev *dev,
+			struct mlx4_mpt_entry **mpt_entry);
+void mlx4_mr_rereg_mem_cleanup(struct mlx4_dev *dev, struct mlx4_mr *mr);
+int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
+			    u64 iova, u64 size, int npages,
+			    int page_shift, struct mlx4_mpt_entry *mpt_entry);
 
 /* Returns true if running in low memory profile (kdump kernel) */
 static inline bool mlx4_low_memory_profile(void)
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index babaea9..29ce014 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -213,6 +213,8 @@
 #define DW_MCI_QUIRK_HIGHSPEED			BIT(2)
 /* Unreliable card detection */
 #define DW_MCI_QUIRK_BROKEN_CARD_DETECTION	BIT(3)
+/* No write protect */
+#define DW_MCI_QUIRK_NO_WRITE_PROTECT		BIT(4)
 
 /* Slot level quirks */
 /* This slot has no write protect */
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 08abe99..09ebe57 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -104,9 +104,6 @@
 
 	const struct sdhci_ops *ops;	/* Low level hw interface */
 
-	struct regulator *vmmc;		/* Power regulator (vmmc) */
-	struct regulator *vqmmc;	/* Signaling regulator (vccq) */
-
 	/* Internal data */
 	struct mmc_host *mmc;	/* MMC structure */
 	u64 dma_mask;		/* custom DMA mask */
diff --git a/include/linux/mount.h b/include/linux/mount.h
index b0c1e65..9262e4b 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -69,6 +69,7 @@
 };
 
 struct file; /* forward dec */
+struct path;
 
 extern int mnt_want_write(struct vfsmount *mnt);
 extern int mnt_want_write_file(struct file *file);
@@ -77,8 +78,7 @@
 extern void mnt_drop_write_file(struct file *file);
 extern void mntput(struct vfsmount *mnt);
 extern struct vfsmount *mntget(struct vfsmount *mnt);
-extern void mnt_pin(struct vfsmount *mnt);
-extern void mnt_unpin(struct vfsmount *mnt);
+extern struct vfsmount *mnt_clone_internal(struct path *path);
 extern int __mnt_is_readonly(struct vfsmount *mnt);
 
 struct file_system_type;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index e30f605..5180a7e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -52,6 +52,7 @@
 	unsigned long		jiffies;
 	struct rpc_cred *	cred;
 	int			mask;
+	struct rcu_head		rcu_head;
 };
 
 struct nfs_lockowner {
@@ -352,6 +353,7 @@
 extern int nfs_attribute_timeout(struct inode *inode);
 extern int nfs_attribute_cache_expired(struct inode *inode);
 extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
+extern int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode);
 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 extern int nfs_setattr(struct dentry *, struct iattr *);
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 1150ea4..922be2e 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -45,6 +45,7 @@
 	struct sockaddr_storage	cl_addr;	/* server identifier */
 	size_t			cl_addrlen;
 	char *			cl_hostname;	/* hostname of server */
+	char *			cl_acceptor;	/* GSSAPI acceptor name */
 	struct list_head	cl_share_link;	/* link in global client list */
 	struct list_head	cl_superblocks;	/* List of nfs_server structs */
 
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 7d9096d..6ad2bbc 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -26,7 +26,7 @@
 	PG_MAPPED,		/* page private set for buffered io */
 	PG_CLEAN,		/* write succeeded */
 	PG_COMMIT_TO_DS,	/* used by pnfs layouts */
-	PG_INODE_REF,		/* extra ref held by inode (head req only) */
+	PG_INODE_REF,		/* extra ref held by inode when in writeback */
 	PG_HEADLOCK,		/* page group lock of wb_head */
 	PG_TEARDOWN,		/* page group sync for destroy */
 	PG_UNLOCKPAGE,		/* page group sync bit in read path */
@@ -62,12 +62,13 @@
 
 struct nfs_rw_ops {
 	const fmode_t rw_mode;
-	struct nfs_rw_header *(*rw_alloc_header)(void);
-	void (*rw_free_header)(struct nfs_rw_header *);
-	void (*rw_release)(struct nfs_pgio_data *);
-	int  (*rw_done)(struct rpc_task *, struct nfs_pgio_data *, struct inode *);
-	void (*rw_result)(struct rpc_task *, struct nfs_pgio_data *);
-	void (*rw_initiate)(struct nfs_pgio_data *, struct rpc_message *,
+	struct nfs_pgio_header *(*rw_alloc_header)(void);
+	void (*rw_free_header)(struct nfs_pgio_header *);
+	void (*rw_release)(struct nfs_pgio_header *);
+	int  (*rw_done)(struct rpc_task *, struct nfs_pgio_header *,
+			struct inode *);
+	void (*rw_result)(struct rpc_task *, struct nfs_pgio_header *);
+	void (*rw_initiate)(struct nfs_pgio_header *, struct rpc_message *,
 			    struct rpc_task_setup *, int);
 };
 
@@ -111,6 +112,8 @@
 			     int how);
 extern	int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
 				   struct nfs_page *);
+extern  int nfs_pageio_resend(struct nfs_pageio_descriptor *,
+			      struct nfs_pgio_header *);
 extern	void nfs_pageio_complete(struct nfs_pageio_descriptor *desc);
 extern	void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *, pgoff_t);
 extern size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc,
@@ -119,7 +122,7 @@
 extern  int nfs_wait_on_request(struct nfs_page *);
 extern	void nfs_unlock_request(struct nfs_page *req);
 extern	void nfs_unlock_and_release_request(struct nfs_page *);
-extern void nfs_page_group_lock(struct nfs_page *);
+extern int nfs_page_group_lock(struct nfs_page *, bool);
 extern void nfs_page_group_unlock(struct nfs_page *);
 extern bool nfs_page_group_sync_on_bit(struct nfs_page *, unsigned int);
 
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 9a1396e..0040629 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -993,6 +993,7 @@
 	unsigned int			sc_uaddr_len;
 	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
 	u32				sc_cb_ident;
+	struct rpc_cred			*sc_cred;
 };
 
 struct nfs4_setclientid_res {
@@ -1253,18 +1254,12 @@
 	NFS_IOHDR_ERROR = 0,
 	NFS_IOHDR_EOF,
 	NFS_IOHDR_REDO,
-	NFS_IOHDR_NEED_COMMIT,
-	NFS_IOHDR_NEED_RESCHED,
 };
 
-struct nfs_pgio_data;
-
 struct nfs_pgio_header {
 	struct inode		*inode;
 	struct rpc_cred		*cred;
 	struct list_head	pages;
-	struct nfs_pgio_data	*data;
-	atomic_t		refcnt;
 	struct nfs_page		*req;
 	struct nfs_writeverf	verf;		/* Used for writes */
 	struct pnfs_layout_segment *lseg;
@@ -1281,28 +1276,22 @@
 	int			error;		/* merge with pnfs_error */
 	unsigned long		good_bytes;	/* boundary of good data */
 	unsigned long		flags;
-};
 
-struct nfs_pgio_data {
-	struct nfs_pgio_header	*header;
+	/*
+	 * rpc data
+	 */
 	struct rpc_task		task;
 	struct nfs_fattr	fattr;
-	struct nfs_writeverf	verf;		/* Used for writes */
 	struct nfs_pgio_args	args;		/* argument struct */
 	struct nfs_pgio_res	res;		/* result struct */
 	unsigned long		timestamp;	/* For lease renewal */
-	int (*pgio_done_cb) (struct rpc_task *task, struct nfs_pgio_data *data);
+	int (*pgio_done_cb)(struct rpc_task *, struct nfs_pgio_header *);
 	__u64			mds_offset;	/* Filelayout dense stripe */
-	struct nfs_page_array	pages;
+	struct nfs_page_array	page_array;
 	struct nfs_client	*ds_clp;	/* pNFS data server */
 	int			ds_idx;		/* ds index if ds_clp is set */
 };
 
-struct nfs_rw_header {
-	struct nfs_pgio_header	header;
-	struct nfs_pgio_data	rpc_data;
-};
-
 struct nfs_mds_commit_info {
 	atomic_t rpcs_out;
 	unsigned long		ncommit;
@@ -1432,11 +1421,12 @@
 			     struct nfs_pathconf *);
 	int	(*set_capabilities)(struct nfs_server *, struct nfs_fh *);
 	int	(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, int);
-	int	(*pgio_rpc_prepare)(struct rpc_task *, struct nfs_pgio_data *);
-	void	(*read_setup)   (struct nfs_pgio_data *, struct rpc_message *);
-	int	(*read_done)  (struct rpc_task *, struct nfs_pgio_data *);
-	void	(*write_setup)  (struct nfs_pgio_data *, struct rpc_message *);
-	int	(*write_done)  (struct rpc_task *, struct nfs_pgio_data *);
+	int	(*pgio_rpc_prepare)(struct rpc_task *,
+				    struct nfs_pgio_header *);
+	void	(*read_setup)(struct nfs_pgio_header *, struct rpc_message *);
+	int	(*read_done)(struct rpc_task *, struct nfs_pgio_header *);
+	void	(*write_setup)(struct nfs_pgio_header *, struct rpc_message *);
+	int	(*write_done)(struct rpc_task *, struct nfs_pgio_header *);
 	void	(*commit_setup) (struct nfs_commit_data *, struct rpc_message *);
 	void	(*commit_rpc_prepare)(struct rpc_task *, struct nfs_commit_data *);
 	int	(*commit_done) (struct rpc_task *, struct nfs_commit_data *);
diff --git a/include/linux/of.h b/include/linux/of.h
index 196b34c..6c4363b 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -74,8 +74,6 @@
 	uint32_t args[MAX_PHANDLE_ARGS];
 };
 
-extern int of_node_add(struct device_node *node);
-
 /* initialize a node */
 extern struct kobj_type of_node_ktype;
 static inline void of_node_init(struct device_node *node)
@@ -113,6 +111,7 @@
 extern struct device_node *of_allnodes;
 extern struct device_node *of_chosen;
 extern struct device_node *of_aliases;
+extern struct device_node *of_stdout;
 extern raw_spinlock_t devtree_lock;
 
 static inline bool of_have_populated_dt(void)
@@ -204,6 +203,7 @@
 #define OF_DYNAMIC	1 /* node and properties were allocated via kmalloc */
 #define OF_DETACHED	2 /* node has been detached from the device tree */
 #define OF_POPULATED	3 /* device already created for the node */
+#define OF_POPULATED_BUS	4 /* of_platform_populate recursed to children of this node */
 
 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
@@ -322,6 +322,7 @@
 struct of_prop_reconfig {
 	struct device_node	*dn;
 	struct property		*prop;
+	struct property		*old_prop;
 };
 
 extern int of_reconfig_notifier_register(struct notifier_block *);
@@ -352,7 +353,7 @@
  */
 const char *of_prop_next_string(struct property *prop, const char *cur);
 
-int of_device_is_stdout_path(struct device_node *dn);
+bool of_console_check(struct device_node *dn, char *name, int index);
 
 #else /* CONFIG_OF */
 
@@ -564,9 +565,9 @@
 	return 0;
 }
 
-static inline int of_device_is_stdout_path(struct device_node *dn)
+static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
 {
-	return 0;
+	return false;
 }
 
 static inline const __be32 *of_prop_next_u32(struct property *prop,
@@ -786,4 +787,80 @@
 #define OF_DECLARE_2(table, name, compat, fn) \
 		_OF_DECLARE(table, name, compat, fn, of_init_fn_2)
 
+/**
+ * struct of_changeset_entry	- Holds a changeset entry
+ *
+ * @node:	list_head for the log list
+ * @action:	notifier action
+ * @np:		pointer to the device node affected
+ * @prop:	pointer to the property affected
+ * @old_prop:	hold a pointer to the original property
+ *
+ * Every modification of the device tree during a changeset
+ * is held in a list of of_changeset_entry structures.
+ * That way we can recover from a partial application, or we can
+ * revert the changeset
+ */
+struct of_changeset_entry {
+	struct list_head node;
+	unsigned long action;
+	struct device_node *np;
+	struct property *prop;
+	struct property *old_prop;
+};
+
+/**
+ * struct of_changeset - changeset tracker structure
+ *
+ * @entries:	list_head for the changeset entries
+ *
+ * changesets are a convenient way to apply bulk changes to the
+ * live tree. In case of an error, changes are rolled-back.
+ * changesets live on after initial application, and if not
+ * destroyed after use, they can be reverted in one single call.
+ */
+struct of_changeset {
+	struct list_head entries;
+};
+
+#ifdef CONFIG_OF_DYNAMIC
+extern void of_changeset_init(struct of_changeset *ocs);
+extern void of_changeset_destroy(struct of_changeset *ocs);
+extern int of_changeset_apply(struct of_changeset *ocs);
+extern int of_changeset_revert(struct of_changeset *ocs);
+extern int of_changeset_action(struct of_changeset *ocs,
+		unsigned long action, struct device_node *np,
+		struct property *prop);
+
+static inline int of_changeset_attach_node(struct of_changeset *ocs,
+		struct device_node *np)
+{
+	return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
+}
+
+static inline int of_changeset_detach_node(struct of_changeset *ocs,
+		struct device_node *np)
+{
+	return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
+}
+
+static inline int of_changeset_add_property(struct of_changeset *ocs,
+		struct device_node *np, struct property *prop)
+{
+	return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
+}
+
+static inline int of_changeset_remove_property(struct of_changeset *ocs,
+		struct device_node *np, struct property *prop)
+{
+	return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
+}
+
+static inline int of_changeset_update_property(struct of_changeset *ocs,
+		struct device_node *np, struct property *prop)
+{
+	return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
+}
+#endif
+
 #endif /* _LINUX_OF_H */
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index ae36298..56bc026 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -41,6 +41,8 @@
 						     const char *name);
 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
+extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
+		struct of_dma *ofdma);
 #else
 static inline int of_dma_controller_register(struct device_node *np,
 		struct dma_chan *(*of_dma_xlate)
@@ -66,6 +68,8 @@
 	return NULL;
 }
 
+#define of_dma_xlate_by_chan_id NULL
+
 #endif
 
 #endif /* __LINUX_OF_DMA_H */
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index d96e1ba..c2b0627 100644
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -72,7 +72,7 @@
 				const struct of_device_id *matches,
 				const struct of_dev_auxdata *lookup,
 				struct device *parent);
-extern int of_platform_depopulate(struct device *parent);
+extern void of_platform_depopulate(struct device *parent);
 #else
 static inline int of_platform_populate(struct device_node *root,
 					const struct of_device_id *matches,
@@ -81,10 +81,7 @@
 {
 	return -ENODEV;
 }
-static inline int of_platform_depopulate(struct device *parent)
-{
-	return -ENODEV;
-}
+static inline void of_platform_depopulate(struct device *parent) { }
 #endif
 
 #endif	/* _LINUX_OF_PLATFORM_H */
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 4669ddf..5b5efae 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -8,6 +8,7 @@
 struct reserved_mem {
 	const char			*name;
 	unsigned long			fdt_node;
+	unsigned long			phandle;
 	const struct reserved_mem_ops	*ops;
 	phys_addr_t			base;
 	phys_addr_t			size;
@@ -27,10 +28,16 @@
 	_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
 
 #ifdef CONFIG_OF_RESERVED_MEM
+void of_reserved_mem_device_init(struct device *dev);
+void of_reserved_mem_device_release(struct device *dev);
+
 void fdt_init_reserved_mem(void);
 void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
 			       phys_addr_t base, phys_addr_t size);
 #else
+static inline void of_reserved_mem_device_init(struct device *dev) { }
+static inline void of_reserved_mem_device_release(struct device *pdev) { }
+
 static inline void fdt_init_reserved_mem(void) { }
 static inline void fdt_reserved_mem_save_node(unsigned long node,
 		const char *uname, phys_addr_t base, phys_addr_t size) { }
diff --git a/include/linux/platform_data/dma-imx.h b/include/linux/platform_data/dma-imx.h
index d05542a..6a1357d 100644
--- a/include/linux/platform_data/dma-imx.h
+++ b/include/linux/platform_data/dma-imx.h
@@ -40,6 +40,7 @@
 	IMX_DMATYPE_ASRC,	/* ASRC */
 	IMX_DMATYPE_ESAI,	/* ESAI */
 	IMX_DMATYPE_SSI_DUAL,	/* SSI Dual FIFO */
+	IMX_DMATYPE_ASRC_SP,	/* Shared ASRC */
 };
 
 enum imx_dma_prio {
diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
index eb8d562..bdb2710 100644
--- a/include/linux/platform_data/edma.h
+++ b/include/linux/platform_data/edma.h
@@ -150,6 +150,8 @@
 void edma_pause(unsigned channel);
 void edma_resume(unsigned channel);
 
+void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no);
+
 struct edma_rsv_info {
 
 	const s16	(*rsv_chans)[2];
diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h
index 2bf1b30..51e70cf 100644
--- a/include/linux/platform_data/mmc-omap.h
+++ b/include/linux/platform_data/mmc-omap.h
@@ -28,6 +28,7 @@
  */
 #define OMAP_HSMMC_SUPPORTS_DUAL_VOLT		BIT(0)
 #define OMAP_HSMMC_BROKEN_MULTIBLOCK_READ	BIT(1)
+#define OMAP_HSMMC_SWAKEUP_MISSING		BIT(2)
 
 struct mmc_card;
 
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 0990997..d78125f 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -10,6 +10,9 @@
 extern const char linux_banner[];
 extern const char linux_proc_banner[];
 
+extern char *log_buf_addr_get(void);
+extern u32 log_buf_len_get(void);
+
 static inline int printk_get_level(const char *buffer)
 {
 	if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 0f3c5d3..80d345a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -390,7 +390,6 @@
 	unsigned int flags;			/* Flags for diskquotas on this device */
 	struct mutex dqio_mutex;		/* lock device while I/O in progress */
 	struct mutex dqonoff_mutex;		/* Serialize quotaon & quotaoff */
-	struct rw_semaphore dqptr_sem;		/* serialize ops using quota_info struct, pointers from inode to dquots */
 	struct inode *files[MAXQUOTAS];		/* inodes of quotafiles */
 	struct mem_dqinfo info[MAXQUOTAS];	/* Information for each quota type */
 	const struct quota_format_ops *ops[MAXQUOTAS];	/* Operations for each type */
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 9cda293..36826c0 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -21,7 +21,7 @@
 #include <linux/rculist.h>
 
 struct rhash_head {
-	struct rhash_head		*next;
+	struct rhash_head __rcu		*next;
 };
 
 #define INIT_HASH_HEAD(ptr) ((ptr)->next = NULL)
@@ -97,7 +97,7 @@
 void rhashtable_insert(struct rhashtable *ht, struct rhash_head *node, gfp_t);
 bool rhashtable_remove(struct rhashtable *ht, struct rhash_head *node, gfp_t);
 void rhashtable_remove_pprev(struct rhashtable *ht, struct rhash_head *obj,
-			     struct rhash_head **pprev, gfp_t flags);
+			     struct rhash_head __rcu **pprev, gfp_t flags);
 
 bool rht_grow_above_75(const struct rhashtable *ht, size_t new_size);
 bool rht_shrink_below_30(const struct rhashtable *ht, size_t new_size);
@@ -117,18 +117,12 @@
 #define rht_dereference_rcu(p, ht) \
 	rcu_dereference_check(p, lockdep_rht_mutex_is_held(ht))
 
-/* Internal, use rht_obj() instead */
 #define rht_entry(ptr, type, member) container_of(ptr, type, member)
 #define rht_entry_safe(ptr, type, member) \
 ({ \
 	typeof(ptr) __ptr = (ptr); \
 	   __ptr ? rht_entry(__ptr, type, member) : NULL; \
 })
-#define rht_entry_safe_rcu(ptr, type, member) \
-({ \
-	typeof(*ptr) __rcu *__ptr = (typeof(*ptr) __rcu __force *)ptr; \
-	__ptr ? container_of((typeof(ptr))rcu_dereference_raw(__ptr), type, member) : NULL; \
-})
 
 #define rht_next_entry_safe(pos, ht, member) \
 ({ \
@@ -205,9 +199,10 @@
  * traversal is guarded by rcu_read_lock().
  */
 #define rht_for_each_entry_rcu(pos, head, member) \
-	for (pos = rht_entry_safe_rcu(head, typeof(*(pos)), member); \
+	for (pos = rht_entry_safe(rcu_dereference_raw(head), \
+				  typeof(*(pos)), member); \
 	     pos; \
-	     pos = rht_entry_safe_rcu((pos)->member.next, \
-				      typeof(*(pos)), member))
+	     pos = rht_entry_safe(rcu_dereference_raw((pos)->member.next), \
+				  typeof(*(pos)), member))
 
 #endif /* _LINUX_RHASHTABLE_H */
diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
index b7b43b8..56b97ee 100644
--- a/include/linux/sh_dma.h
+++ b/include/linux/sh_dma.h
@@ -95,19 +95,21 @@
 };
 
 /* DMAOR definitions */
-#define DMAOR_AE	0x00000004
+#define DMAOR_AE	0x00000004	/* Address Error Flag */
 #define DMAOR_NMIF	0x00000002
-#define DMAOR_DME	0x00000001
+#define DMAOR_DME	0x00000001	/* DMA Master Enable */
 
 /* Definitions for the SuperH DMAC */
-#define DM_INC	0x00004000
-#define DM_DEC	0x00008000
-#define DM_FIX	0x0000c000
-#define SM_INC	0x00001000
-#define SM_DEC	0x00002000
-#define SM_FIX	0x00003000
-#define CHCR_DE	0x00000001
-#define CHCR_TE	0x00000002
-#define CHCR_IE	0x00000004
+#define DM_INC	0x00004000	/* Destination addresses are incremented */
+#define DM_DEC	0x00008000	/* Destination addresses are decremented */
+#define DM_FIX	0x0000c000	/* Destination address is fixed */
+#define SM_INC	0x00001000	/* Source addresses are incremented */
+#define SM_DEC	0x00002000	/* Source addresses are decremented */
+#define SM_FIX	0x00003000	/* Source address is fixed */
+#define RS_AUTO	0x00000400	/* Auto Request */
+#define RS_ERS	0x00000800	/* DMA extended resource selector */
+#define CHCR_DE	0x00000001	/* DMA Enable */
+#define CHCR_TE	0x00000002	/* Transfer End Flag */
+#define CHCR_IE	0x00000004	/* Interrupt Enable */
 
 #endif
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 11c2705..abde271 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2555,6 +2555,7 @@
 void skb_scrub_packet(struct sk_buff *skb, bool xnet);
 unsigned int skb_gso_transport_seglen(const struct sk_buff *skb);
 struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features);
+struct sk_buff *skb_vlan_untag(struct sk_buff *skb);
 
 struct skb_checksum_ops {
 	__wsum (*update)(const void *mem, int len, __wsum wsum);
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index 790be14..8e03007 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -103,6 +103,7 @@
 
 /* Flags for rpcauth_lookupcred() */
 #define RPCAUTH_LOOKUP_NEW		0x01	/* Accept an uninitialised cred */
+#define RPCAUTH_LOOKUP_RCU		0x02	/* lock-less lookup */
 
 /*
  * Client authentication ops
@@ -140,6 +141,7 @@
 						void *, __be32 *, void *);
 	int			(*crkey_timeout)(struct rpc_cred *);
 	bool			(*crkey_to_expire)(struct rpc_cred *);
+	char *			(*crstringify_acceptor)(struct rpc_cred *);
 };
 
 extern const struct rpc_authops	authunix_ops;
@@ -153,6 +155,7 @@
 void 			rpc_destroy_authunix(void);
 
 struct rpc_cred *	rpc_lookup_cred(void);
+struct rpc_cred *	rpc_lookup_cred_nonblock(void);
 struct rpc_cred *	rpc_lookup_machine_cred(const char *service_name);
 int			rpcauth_register(const struct rpc_authops *);
 int			rpcauth_unregister(const struct rpc_authops *);
@@ -182,6 +185,7 @@
 int			rpcauth_key_timeout_notify(struct rpc_auth *,
 						struct rpc_cred *);
 bool			rpcauth_cred_key_to_expire(struct rpc_cred *);
+char *			rpcauth_stringify_acceptor(struct rpc_cred *);
 
 static inline
 struct rpc_cred *	get_rpccred(struct rpc_cred *cred)
diff --git a/include/linux/sunrpc/auth_gss.h b/include/linux/sunrpc/auth_gss.h
index f1cfd4c..36eebc4 100644
--- a/include/linux/sunrpc/auth_gss.h
+++ b/include/linux/sunrpc/auth_gss.h
@@ -69,8 +69,9 @@
 	enum rpc_gss_proc	gc_proc;
 	u32			gc_seq;
 	spinlock_t		gc_seq_lock;
-	struct gss_ctx __rcu	*gc_gss_ctx;
+	struct gss_ctx		*gc_gss_ctx;
 	struct xdr_netobj	gc_wire_ctx;
+	struct xdr_netobj	gc_acceptor;
 	u32			gc_win;
 	unsigned long		gc_expiry;
 	struct rcu_head		gc_rcu;
diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index 5af2931..df02a41 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -81,7 +81,7 @@
 		       struct xdr_netobj *in,
 		       struct xdr_netobj *out);	/* complete key generation */
 	u32 (*encrypt_v2) (struct krb5_ctx *kctx, u32 offset,
-			   struct xdr_buf *buf, int ec,
+			   struct xdr_buf *buf,
 			   struct page **pages); /* v2 encryption function */
 	u32 (*decrypt_v2) (struct krb5_ctx *kctx, u32 offset,
 			   struct xdr_buf *buf, u32 *headskip,
@@ -310,7 +310,7 @@
 
 u32
 gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
-		     struct xdr_buf *buf, int ec,
+		     struct xdr_buf *buf,
 		     struct page **pages);
 
 u32
diff --git a/include/linux/sunrpc/xprtrdma.h b/include/linux/sunrpc/xprtrdma.h
index c2f04e1..64a0a0a 100644
--- a/include/linux/sunrpc/xprtrdma.h
+++ b/include/linux/sunrpc/xprtrdma.h
@@ -62,8 +62,6 @@
 #define RPCRDMA_INLINE_PAD_THRESH  (512)/* payload threshold to pad (bytes) */
 
 /* memory registration strategies */
-#define RPCRDMA_PERSISTENT_REGISTRATION (1)
-
 enum rpcrdma_memreg {
 	RPCRDMA_BOUNCEBUFFERS = 0,
 	RPCRDMA_REGISTER,
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index f7e11c7..0305cde 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -158,6 +158,42 @@
 	char name[THERMAL_NAME_LENGTH];
 };
 
+/**
+ * struct thermal_zone_device - structure for a thermal zone
+ * @id:		unique id number for each thermal zone
+ * @type:	the thermal zone device type
+ * @device:	&struct device for this thermal zone
+ * @trip_temp_attrs:	attributes for trip points for sysfs: trip temperature
+ * @trip_type_attrs:	attributes for trip points for sysfs: trip type
+ * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
+ * @devdata:	private pointer for device private data
+ * @trips:	number of trip points the thermal zone supports
+ * @passive_delay:	number of milliseconds to wait between polls when
+ *			performing passive cooling.  Currenty only used by the
+ *			step-wise governor
+ * @polling_delay:	number of milliseconds to wait between polls when
+ *			checking whether trip points have been crossed (0 for
+ *			interrupt driven systems)
+ * @temperature:	current temperature.  This is only for core code,
+ *			drivers should use thermal_zone_get_temp() to get the
+ *			current temperature
+ * @last_temperature:	previous temperature read
+ * @emul_temperature:	emulated temperature when using CONFIG_THERMAL_EMULATION
+ * @passive:		1 if you've crossed a passive trip point, 0 otherwise.
+ *			Currenty only used by the step-wise governor.
+ * @forced_passive:	If > 0, temperature at which to switch on all ACPI
+ *			processor cooling devices.  Currently only used by the
+ *			step-wise governor.
+ * @ops:	operations this &thermal_zone_device supports
+ * @tzp:	thermal zone parameters
+ * @governor:	pointer to the governor for this thermal zone
+ * @thermal_instances:	list of &struct thermal_instance of this thermal zone
+ * @idr:	&struct idr to generate unique id for this zone's cooling
+ *		devices
+ * @lock:	lock to protect thermal_instances list
+ * @node:	node in thermal_tz_list (in thermal_core.c)
+ * @poll_queue:	delayed work for polling
+ */
 struct thermal_zone_device {
 	int id;
 	char type[THERMAL_NAME_LENGTH];
@@ -179,12 +215,18 @@
 	struct thermal_governor *governor;
 	struct list_head thermal_instances;
 	struct idr idr;
-	struct mutex lock; /* protect thermal_instances list */
+	struct mutex lock;
 	struct list_head node;
 	struct delayed_work poll_queue;
 };
 
-/* Structure that holds thermal governor information */
+/**
+ * struct thermal_governor - structure that holds thermal governor information
+ * @name:	name of the governor
+ * @throttle:	callback called for every trip point even if temperature is
+ *		below the trip point temperature
+ * @governor_list:	node in thermal_governor_list (in thermal_core.c)
+ */
 struct thermal_governor {
 	char name[THERMAL_NAME_LENGTH];
 	int (*throttle)(struct thermal_zone_device *tz, int trip);
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 09a7cff..48d64e6 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -84,7 +84,7 @@
 void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
 			unsigned long nr_segs, size_t count);
 ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
-			size_t maxsize, size_t *start);
+			unsigned maxpages, size_t *start);
 ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages,
 			size_t maxsize, size_t *start);
 int iov_iter_npages(const struct iov_iter *i, int maxpages);
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 25a0fbd..d320411 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -98,16 +98,16 @@
 extern long vfio_external_check_extension(struct vfio_group *group,
 					  unsigned long arg);
 
+struct pci_dev;
 #ifdef CONFIG_EEH
-extern int vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
+extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
 extern void vfio_spapr_pci_eeh_release(struct pci_dev *pdev);
 extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
 				       unsigned int cmd,
 				       unsigned long arg);
 #else
-static inline int vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
+static inline void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
 {
-	return 0;
 }
 
 static inline void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 7a43138..5fbe656 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -62,6 +62,7 @@
 	void	    (*addr2sockaddr)(struct sock *sk, struct sockaddr *);
 	int	    (*bind_conflict)(const struct sock *sk,
 				     const struct inet_bind_bucket *tb, bool relax);
+	void	    (*mtu_reduced)(struct sock *sk);
 };
 
 /** inet_connection_sock - INET connection oriented sock
diff --git a/include/net/sock.h b/include/net/sock.h
index 38805fa..7f2ab72 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -987,7 +987,6 @@
 						struct sk_buff *skb);
 
 	void		(*release_cb)(struct sock *sk);
-	void		(*mtu_reduced)(struct sock *sk);
 
 	/* Keeping track of sk's, looking them up, and port selection methods. */
 	void			(*hash)(struct sock *sk);
diff --git a/include/net/tcp.h b/include/net/tcp.h
index dafa1cb..590e01a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -417,7 +417,7 @@
 void tcp_init_metrics(struct sock *sk);
 void tcp_metrics_init(void);
 bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
-			bool paws_check);
+			bool paws_check, bool timestamps);
 bool tcp_remember_stamp(struct sock *sk);
 bool tcp_tw_remember_stamp(struct inet_timewait_sock *tw);
 void tcp_fetch_timewait_stamp(struct sock *sk, struct dst_entry *dst);
@@ -448,6 +448,7 @@
  */
 
 void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb);
+void tcp_v4_mtu_reduced(struct sock *sk);
 int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
 struct sock *tcp_create_openreq_child(struct sock *sk,
 				      struct request_sock *req,
@@ -705,8 +706,10 @@
 #define TCPCB_SACKED_RETRANS	0x02	/* SKB retransmitted		*/
 #define TCPCB_LOST		0x04	/* SKB is lost			*/
 #define TCPCB_TAGBITS		0x07	/* All tag bits			*/
+#define TCPCB_REPAIRED		0x10	/* SKB repaired (no skb_mstamp)	*/
 #define TCPCB_EVER_RETRANS	0x80	/* Ever retransmitted frame	*/
-#define TCPCB_RETRANS		(TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
+#define TCPCB_RETRANS		(TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS| \
+				TCPCB_REPAIRED)
 
 	__u8		ip_dsfield;	/* IPv4 tos or IPv6 dsfield	*/
 	/* 1 byte hole */
diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
index 3d81b90..9bb99e9 100644
--- a/include/rdma/ib_mad.h
+++ b/include/rdma/ib_mad.h
@@ -40,6 +40,7 @@
 #include <linux/list.h>
 
 #include <rdma/ib_verbs.h>
+#include <uapi/rdma/ib_user_mad.h>
 
 /* Management base version */
 #define IB_MGMT_BASE_VERSION			1
@@ -355,9 +356,13 @@
  * @hi_tid: Access layer assigned transaction ID for this client.
  *   Unsolicited MADs sent by this client will have the upper 32-bits
  *   of their TID set to this value.
+ * @flags: registration flags
  * @port_num: Port number on which QP is registered
  * @rmpp_version: If set, indicates the RMPP version used by this agent.
  */
+enum {
+	IB_MAD_USER_RMPP = IB_USER_MAD_USER_RMPP,
+};
 struct ib_mad_agent {
 	struct ib_device	*device;
 	struct ib_qp		*qp;
@@ -367,6 +372,7 @@
 	ib_mad_snoop_handler	snoop_handler;
 	void			*context;
 	u32			hi_tid;
+	u32			flags;
 	u8			port_num;
 	u8			rmpp_version;
 };
@@ -426,6 +432,7 @@
  *   in the range from 0x30 to 0x4f. Otherwise not used.
  * @method_mask: The caller will receive unsolicited MADs for any method
  *   where @method_mask = 1.
+ *
  */
 struct ib_mad_reg_req {
 	u8	mgmt_class;
@@ -451,6 +458,7 @@
  * @recv_handler: The completion callback routine invoked for a received
  *   MAD.
  * @context: User specified context associated with the registration.
+ * @registration_flags: Registration flags to set for this agent
  */
 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 					   u8 port_num,
@@ -459,7 +467,8 @@
 					   u8 rmpp_version,
 					   ib_mad_send_handler send_handler,
 					   ib_mad_recv_handler recv_handler,
-					   void *context);
+					   void *context,
+					   u32 registration_flags);
 
 enum ib_mad_snoop_flags {
 	/*IB_MAD_SNOOP_POSTED_SENDS	   = 1,*/
@@ -661,4 +670,11 @@
  */
 void ib_free_send_mad(struct ib_mad_send_buf *send_buf);
 
+/**
+ * ib_mad_kernel_rmpp_agent - Returns if the agent is performing RMPP.
+ * @agent: the agent in question
+ * @return: true if agent is performing rmpp, false otherwise.
+ */
+int ib_mad_kernel_rmpp_agent(struct ib_mad_agent *agent);
+
 #endif /* IB_MAD_H */
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7ccef34..ed44cc0 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1097,7 +1097,8 @@
 enum ib_mr_rereg_flags {
 	IB_MR_REREG_TRANS	= 1,
 	IB_MR_REREG_PD		= (1<<1),
-	IB_MR_REREG_ACCESS	= (1<<2)
+	IB_MR_REREG_ACCESS	= (1<<2),
+	IB_MR_REREG_SUPPORTED	= ((IB_MR_REREG_ACCESS << 1) - 1)
 };
 
 /**
@@ -1547,6 +1548,13 @@
 						  u64 virt_addr,
 						  int mr_access_flags,
 						  struct ib_udata *udata);
+	int			   (*rereg_user_mr)(struct ib_mr *mr,
+						    int flags,
+						    u64 start, u64 length,
+						    u64 virt_addr,
+						    int mr_access_flags,
+						    struct ib_pd *pd,
+						    struct ib_udata *udata);
 	int                        (*query_mr)(struct ib_mr *mr,
 					       struct ib_mr_attr *mr_attr);
 	int                        (*dereg_mr)(struct ib_mr *mr);
diff --git a/include/scsi/sg.h b/include/scsi/sg.h
index 9859355..750e5db 100644
--- a/include/scsi/sg.h
+++ b/include/scsi/sg.h
@@ -86,7 +86,9 @@
 #define SG_FLAG_MMAP_IO 4       /* request memory mapped IO */
 #define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */
 				/* user space (debug indirect IO) */
-#define SG_FLAG_Q_AT_TAIL 0x10  /* default is Q_AT_HEAD */
+/* defaults:: for sg driver: Q_AT_HEAD; for block layer: Q_AT_TAIL */
+#define SG_FLAG_Q_AT_TAIL 0x10
+#define SG_FLAG_Q_AT_HEAD 0x20
 
 /* following 'info' values are "or"-ed together */
 #define SG_INFO_OK_MASK 0x1
diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index c9c3c04..981acf7 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -148,11 +148,13 @@
 );
 
 TRACE_EVENT(bcache_write,
-	TP_PROTO(struct bio *bio, bool writeback, bool bypass),
-	TP_ARGS(bio, writeback, bypass),
+	TP_PROTO(struct cache_set *c, u64 inode, struct bio *bio,
+		bool writeback, bool bypass),
+	TP_ARGS(c, inode, bio, writeback, bypass),
 
 	TP_STRUCT__entry(
-		__field(dev_t,		dev			)
+		__array(char,		uuid,	16		)
+		__field(u64,		inode			)
 		__field(sector_t,	sector			)
 		__field(unsigned int,	nr_sector		)
 		__array(char,		rwbs,	6		)
@@ -161,7 +163,8 @@
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		memcpy(__entry->uuid, c->sb.set_uuid, 16);
+		__entry->inode		= inode;
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio->bi_iter.bi_size >> 9;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_iter.bi_size);
@@ -169,8 +172,8 @@
 		__entry->bypass = bypass;
 	),
 
-	TP_printk("%d,%d  %s %llu + %u hit %u bypass %u",
-		  MAJOR(__entry->dev), MINOR(__entry->dev),
+	TP_printk("%pU inode %llu  %s %llu + %u hit %u bypass %u",
+		  __entry->uuid, __entry->inode,
 		  __entry->rwbs, (unsigned long long)__entry->sector,
 		  __entry->nr_sector, __entry->writeback, __entry->bypass)
 );
@@ -258,9 +261,9 @@
 	TP_ARGS(b)
 );
 
-DEFINE_EVENT(btree_node, bcache_btree_node_alloc_fail,
-	TP_PROTO(struct btree *b),
-	TP_ARGS(b)
+DEFINE_EVENT(cache_set, bcache_btree_node_alloc_fail,
+	TP_PROTO(struct cache_set *c),
+	TP_ARGS(c)
 );
 
 DEFINE_EVENT(btree_node, bcache_btree_node_free,
diff --git a/include/trace/events/thp.h b/include/trace/events/thp.h
new file mode 100644
index 0000000..b59b065
--- /dev/null
+++ b/include/trace/events/thp.h
@@ -0,0 +1,88 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM thp
+
+#if !defined(_TRACE_THP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_THP_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(hugepage_invalidate,
+
+	    TP_PROTO(unsigned long addr, unsigned long pte),
+	    TP_ARGS(addr, pte),
+	    TP_STRUCT__entry(
+		    __field(unsigned long, addr)
+		    __field(unsigned long, pte)
+		    ),
+
+	    TP_fast_assign(
+		    __entry->addr = addr;
+		    __entry->pte = pte;
+		    ),
+
+	    TP_printk("hugepage invalidate at addr 0x%lx and pte = 0x%lx",
+		      __entry->addr, __entry->pte)
+);
+
+TRACE_EVENT(hugepage_set_pmd,
+
+	    TP_PROTO(unsigned long addr, unsigned long pmd),
+	    TP_ARGS(addr, pmd),
+	    TP_STRUCT__entry(
+		    __field(unsigned long, addr)
+		    __field(unsigned long, pmd)
+		    ),
+
+	    TP_fast_assign(
+		    __entry->addr = addr;
+		    __entry->pmd = pmd;
+		    ),
+
+	    TP_printk("Set pmd with 0x%lx with 0x%lx", __entry->addr, __entry->pmd)
+);
+
+
+TRACE_EVENT(hugepage_update,
+
+	    TP_PROTO(unsigned long addr, unsigned long pte, unsigned long clr, unsigned long set),
+	    TP_ARGS(addr, pte, clr, set),
+	    TP_STRUCT__entry(
+		    __field(unsigned long, addr)
+		    __field(unsigned long, pte)
+		    __field(unsigned long, clr)
+		    __field(unsigned long, set)
+		    ),
+
+	    TP_fast_assign(
+		    __entry->addr = addr;
+		    __entry->pte = pte;
+		    __entry->clr = clr;
+		    __entry->set = set;
+
+		    ),
+
+	    TP_printk("hugepage update at addr 0x%lx and pte = 0x%lx clr = 0x%lx, set = 0x%lx", __entry->addr, __entry->pte, __entry->clr, __entry->set)
+);
+TRACE_EVENT(hugepage_splitting,
+
+	    TP_PROTO(unsigned long addr, unsigned long pte),
+	    TP_ARGS(addr, pte),
+	    TP_STRUCT__entry(
+		    __field(unsigned long, addr)
+		    __field(unsigned long, pte)
+		    ),
+
+	    TP_fast_assign(
+		    __entry->addr = addr;
+		    __entry->pte = pte;
+		    ),
+
+	    TP_printk("hugepage splitting at addr 0x%lx and pte = 0x%lx",
+		      __entry->addr, __entry->pte)
+);
+
+#endif /* _TRACE_THP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/uapi/linux/bsg.h b/include/uapi/linux/bsg.h
index 7a12e1c..02986cf 100644
--- a/include/uapi/linux/bsg.h
+++ b/include/uapi/linux/bsg.h
@@ -10,12 +10,13 @@
 #define BSG_SUB_PROTOCOL_SCSI_TRANSPORT	2
 
 /*
- * For flags member below
- * sg.h sg_io_hdr also has bits defined for it's flags member. However
- * none of these bits are implemented/used by bsg. The bits below are
- * allocated to not conflict with sg.h ones anyway.
+ * For flag constants below:
+ * sg.h sg_io_hdr also has bits defined for it's flags member. These
+ * two flag values (0x10 and 0x20) have the same meaning in sg.h . For
+ * bsg the BSG_FLAG_Q_AT_HEAD flag is ignored since it is the deafult.
  */
-#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
+#define BSG_FLAG_Q_AT_TAIL 0x10 /* default is Q_AT_HEAD */
+#define BSG_FLAG_Q_AT_HEAD 0x20
 
 struct sg_io_v4 {
 	__s32 guard;		/* [i] 'Q' to differentiate from v3 */
diff --git a/include/uapi/linux/virtio_blk.h b/include/uapi/linux/virtio_blk.h
index 6d8e61c..9ad67b2 100644
--- a/include/uapi/linux/virtio_blk.h
+++ b/include/uapi/linux/virtio_blk.h
@@ -40,6 +40,7 @@
 #define VIRTIO_BLK_F_WCE	9	/* Writeback mode enabled after reset */
 #define VIRTIO_BLK_F_TOPOLOGY	10	/* Topology information is available */
 #define VIRTIO_BLK_F_CONFIG_WCE	11	/* Writeback mode available in config */
+#define VIRTIO_BLK_F_MQ		12	/* support more than one vq */
 
 #ifndef __KERNEL__
 /* Old (deprecated) name for VIRTIO_BLK_F_WCE. */
@@ -77,6 +78,10 @@
 
 	/* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */
 	__u8 wce;
+	__u8 unused;
+
+	/* number of vqs, only available when VIRTIO_BLK_F_MQ is set */
+	__u16 num_queues;
 } __attribute__((packed));
 
 /*
diff --git a/include/uapi/rdma/ib_user_mad.h b/include/uapi/rdma/ib_user_mad.h
index d6fce1c..09f809f 100644
--- a/include/uapi/rdma/ib_user_mad.h
+++ b/include/uapi/rdma/ib_user_mad.h
@@ -191,6 +191,45 @@
 	__u8	rmpp_version;
 };
 
+/**
+ * ib_user_mad_reg_req2 - MAD registration request
+ *
+ * @id                 - Set by the _kernel_; used by userspace to identify the
+ *                       registered agent in future requests.
+ * @qpn                - Queue pair number; must be 0 or 1.
+ * @mgmt_class         - Indicates which management class of MADs should be
+ *                       receive by the caller.  This field is only required if
+ *                       the user wishes to receive unsolicited MADs, otherwise
+ *                       it should be 0.
+ * @mgmt_class_version - Indicates which version of MADs for the given
+ *                       management class to receive.
+ * @res                - Ignored.
+ * @flags              - additional registration flags; Must be in the set of
+ *                       flags defined in IB_USER_MAD_REG_FLAGS_CAP
+ * @method_mask        - The caller wishes to receive unsolicited MADs for the
+ *                       methods whose bit(s) is(are) set.
+ * @oui                - Indicates IEEE OUI to use when mgmt_class is a vendor
+ *                       class in the range from 0x30 to 0x4f. Otherwise not
+ *                       used.
+ * @rmpp_version       - If set, indicates the RMPP version to use.
+ */
+enum {
+	IB_USER_MAD_USER_RMPP = (1 << 0),
+};
+#define IB_USER_MAD_REG_FLAGS_CAP (IB_USER_MAD_USER_RMPP)
+struct ib_user_mad_reg_req2 {
+	__u32	id;
+	__u32	qpn;
+	__u8	mgmt_class;
+	__u8	mgmt_class_version;
+	__u16   res;
+	__u32   flags;
+	__u64   method_mask[2];
+	__u32   oui;
+	__u8	rmpp_version;
+	__u8	reserved[3];
+};
+
 #define IB_IOCTL_MAGIC		0x1b
 
 #define IB_USER_MAD_REGISTER_AGENT	_IOWR(IB_IOCTL_MAGIC, 1, \
@@ -200,4 +239,7 @@
 
 #define IB_USER_MAD_ENABLE_PKEY		_IO(IB_IOCTL_MAGIC, 3)
 
+#define IB_USER_MAD_REGISTER_AGENT2     _IOWR(IB_IOCTL_MAGIC, 4, \
+					      struct ib_user_mad_reg_req2)
+
 #endif /* IB_USER_MAD_H */
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index cbfdd4c..26daf55 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -276,6 +276,22 @@
 	__u32 rkey;
 };
 
+struct ib_uverbs_rereg_mr {
+	__u64 response;
+	__u32 mr_handle;
+	__u32 flags;
+	__u64 start;
+	__u64 length;
+	__u64 hca_va;
+	__u32 pd_handle;
+	__u32 access_flags;
+};
+
+struct ib_uverbs_rereg_mr_resp {
+	__u32 lkey;
+	__u32 rkey;
+};
+
 struct ib_uverbs_dereg_mr {
 	__u32 mr_handle;
 };
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h
index 99b80ab..3066718 100644
--- a/include/uapi/rdma/rdma_user_cm.h
+++ b/include/uapi/rdma/rdma_user_cm.h
@@ -34,6 +34,7 @@
 #define RDMA_USER_CM_H
 
 #include <linux/types.h>
+#include <linux/socket.h>
 #include <linux/in6.h>
 #include <rdma/ib_user_verbs.h>
 #include <rdma/ib_user_sa.h>
diff --git a/init/Kconfig b/init/Kconfig
index 44f9ed3..e84c642 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -268,7 +268,7 @@
 	help
 	  Enabling this option adds the system calls process_vm_readv and
 	  process_vm_writev which allow a process with the correct privileges
-	  to directly read from or write to to another process's address space.
+	  to directly read from or write to another process' address space.
 	  See the man page for more details.
 
 config FHANDLE
diff --git a/kernel/acct.c b/kernel/acct.c
index 5179352..b4c667d 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -59,6 +59,7 @@
 #include <asm/div64.h>
 #include <linux/blkdev.h> /* sector_div */
 #include <linux/pid_namespace.h>
+#include <linux/fs_pin.h>
 
 /*
  * These constants control the amount of freespace that suspend and
@@ -75,172 +76,190 @@
 /*
  * External references and all of the globals.
  */
-static void do_acct_process(struct bsd_acct_struct *acct,
-		struct pid_namespace *ns, struct file *);
+static void do_acct_process(struct bsd_acct_struct *acct);
 
-/*
- * This structure is used so that all the data protected by lock
- * can be placed in the same cache line as the lock.  This primes
- * the cache line to have the data after getting the lock.
- */
 struct bsd_acct_struct {
+	struct fs_pin		pin;
+	struct mutex		lock;
 	int			active;
 	unsigned long		needcheck;
 	struct file		*file;
 	struct pid_namespace	*ns;
-	struct list_head	list;
+	struct work_struct	work;
+	struct completion	done;
 };
 
-static DEFINE_SPINLOCK(acct_lock);
-static LIST_HEAD(acct_list);
-
 /*
  * Check the amount of free space and suspend/resume accordingly.
  */
-static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
+static int check_free_space(struct bsd_acct_struct *acct)
 {
 	struct kstatfs sbuf;
-	int res;
-	int act;
-	u64 resume;
-	u64 suspend;
 
-	spin_lock(&acct_lock);
-	res = acct->active;
-	if (!file || time_is_before_jiffies(acct->needcheck))
+	if (time_is_before_jiffies(acct->needcheck))
 		goto out;
-	spin_unlock(&acct_lock);
 
 	/* May block */
-	if (vfs_statfs(&file->f_path, &sbuf))
-		return res;
-	suspend = sbuf.f_blocks * SUSPEND;
-	resume = sbuf.f_blocks * RESUME;
-
-	do_div(suspend, 100);
-	do_div(resume, 100);
-
-	if (sbuf.f_bavail <= suspend)
-		act = -1;
-	else if (sbuf.f_bavail >= resume)
-		act = 1;
-	else
-		act = 0;
-
-	/*
-	 * If some joker switched acct->file under us we'ld better be
-	 * silent and _not_ touch anything.
-	 */
-	spin_lock(&acct_lock);
-	if (file != acct->file) {
-		if (act)
-			res = act > 0;
+	if (vfs_statfs(&acct->file->f_path, &sbuf))
 		goto out;
-	}
 
 	if (acct->active) {
-		if (act < 0) {
+		u64 suspend = sbuf.f_blocks * SUSPEND;
+		do_div(suspend, 100);
+		if (sbuf.f_bavail <= suspend) {
 			acct->active = 0;
 			pr_info("Process accounting paused\n");
 		}
 	} else {
-		if (act > 0) {
+		u64 resume = sbuf.f_blocks * RESUME;
+		do_div(resume, 100);
+		if (sbuf.f_bavail >= resume) {
 			acct->active = 1;
 			pr_info("Process accounting resumed\n");
 		}
 	}
 
 	acct->needcheck = jiffies + ACCT_TIMEOUT*HZ;
-	res = acct->active;
 out:
-	spin_unlock(&acct_lock);
+	return acct->active;
+}
+
+static struct bsd_acct_struct *acct_get(struct pid_namespace *ns)
+{
+	struct bsd_acct_struct *res;
+again:
+	smp_rmb();
+	rcu_read_lock();
+	res = ACCESS_ONCE(ns->bacct);
+	if (!res) {
+		rcu_read_unlock();
+		return NULL;
+	}
+	if (!atomic_long_inc_not_zero(&res->pin.count)) {
+		rcu_read_unlock();
+		cpu_relax();
+		goto again;
+	}
+	rcu_read_unlock();
+	mutex_lock(&res->lock);
+	if (!res->ns) {
+		mutex_unlock(&res->lock);
+		pin_put(&res->pin);
+		goto again;
+	}
 	return res;
 }
 
-/*
- * Close the old accounting file (if currently open) and then replace
- * it with file (if non-NULL).
- *
- * NOTE: acct_lock MUST be held on entry and exit.
- */
-static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
-		struct pid_namespace *ns)
+static void close_work(struct work_struct *work)
 {
-	struct file *old_acct = NULL;
-	struct pid_namespace *old_ns = NULL;
+	struct bsd_acct_struct *acct = container_of(work, struct bsd_acct_struct, work);
+	struct file *file = acct->file;
+	if (file->f_op->flush)
+		file->f_op->flush(file, NULL);
+	__fput_sync(file);
+	complete(&acct->done);
+}
 
-	if (acct->file) {
-		old_acct = acct->file;
-		old_ns = acct->ns;
-		acct->active = 0;
-		acct->file = NULL;
+static void acct_kill(struct bsd_acct_struct *acct,
+		      struct bsd_acct_struct *new)
+{
+	if (acct) {
+		struct pid_namespace *ns = acct->ns;
+		do_acct_process(acct);
+		INIT_WORK(&acct->work, close_work);
+		init_completion(&acct->done);
+		schedule_work(&acct->work);
+		wait_for_completion(&acct->done);
+		pin_remove(&acct->pin);
+		ns->bacct = new;
 		acct->ns = NULL;
-		list_del(&acct->list);
+		atomic_long_dec(&acct->pin.count);
+		mutex_unlock(&acct->lock);
+		pin_put(&acct->pin);
 	}
-	if (file) {
-		acct->file = file;
-		acct->ns = ns;
-		acct->needcheck = jiffies + ACCT_TIMEOUT*HZ;
-		acct->active = 1;
-		list_add(&acct->list, &acct_list);
+}
+
+static void acct_pin_kill(struct fs_pin *pin)
+{
+	struct bsd_acct_struct *acct;
+	acct = container_of(pin, struct bsd_acct_struct, pin);
+	mutex_lock(&acct->lock);
+	if (!acct->ns) {
+		mutex_unlock(&acct->lock);
+		pin_put(pin);
+		acct = NULL;
 	}
-	if (old_acct) {
-		mnt_unpin(old_acct->f_path.mnt);
-		spin_unlock(&acct_lock);
-		do_acct_process(acct, old_ns, old_acct);
-		filp_close(old_acct, NULL);
-		spin_lock(&acct_lock);
-	}
+	acct_kill(acct, NULL);
 }
 
 static int acct_on(struct filename *pathname)
 {
 	struct file *file;
-	struct vfsmount *mnt;
-	struct pid_namespace *ns;
-	struct bsd_acct_struct *acct = NULL;
+	struct vfsmount *mnt, *internal;
+	struct pid_namespace *ns = task_active_pid_ns(current);
+	struct bsd_acct_struct *acct, *old;
+	int err;
+
+	acct = kzalloc(sizeof(struct bsd_acct_struct), GFP_KERNEL);
+	if (!acct)
+		return -ENOMEM;
 
 	/* Difference from BSD - they don't do O_APPEND */
 	file = file_open_name(pathname, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
-	if (IS_ERR(file))
+	if (IS_ERR(file)) {
+		kfree(acct);
 		return PTR_ERR(file);
+	}
 
 	if (!S_ISREG(file_inode(file)->i_mode)) {
+		kfree(acct);
 		filp_close(file, NULL);
 		return -EACCES;
 	}
 
 	if (!file->f_op->write) {
+		kfree(acct);
 		filp_close(file, NULL);
 		return -EIO;
 	}
-
-	ns = task_active_pid_ns(current);
-	if (ns->bacct == NULL) {
-		acct = kzalloc(sizeof(struct bsd_acct_struct), GFP_KERNEL);
-		if (acct == NULL) {
-			filp_close(file, NULL);
-			return -ENOMEM;
-		}
+	internal = mnt_clone_internal(&file->f_path);
+	if (IS_ERR(internal)) {
+		kfree(acct);
+		filp_close(file, NULL);
+		return PTR_ERR(internal);
 	}
-
-	spin_lock(&acct_lock);
-	if (ns->bacct == NULL) {
-		ns->bacct = acct;
-		acct = NULL;
+	err = mnt_want_write(internal);
+	if (err) {
+		mntput(internal);
+		kfree(acct);
+		filp_close(file, NULL);
+		return err;
 	}
-
 	mnt = file->f_path.mnt;
-	mnt_pin(mnt);
-	acct_file_reopen(ns->bacct, file, ns);
-	spin_unlock(&acct_lock);
+	file->f_path.mnt = internal;
 
-	mntput(mnt); /* it's pinned, now give up active reference */
-	kfree(acct);
+	atomic_long_set(&acct->pin.count, 1);
+	acct->pin.kill = acct_pin_kill;
+	acct->file = file;
+	acct->needcheck = jiffies;
+	acct->ns = ns;
+	mutex_init(&acct->lock);
+	mutex_lock_nested(&acct->lock, 1);	/* nobody has seen it yet */
+	pin_insert(&acct->pin, mnt);
 
+	old = acct_get(ns);
+	if (old)
+		acct_kill(old, acct);
+	else
+		ns->bacct = acct;
+	mutex_unlock(&acct->lock);
+	mnt_drop_write(mnt);
+	mntput(mnt);
 	return 0;
 }
 
+static DEFINE_MUTEX(acct_on_mutex);
+
 /**
  * sys_acct - enable/disable process accounting
  * @name: file name for accounting records or NULL to shutdown accounting
@@ -264,78 +283,20 @@
 
 		if (IS_ERR(tmp))
 			return PTR_ERR(tmp);
+		mutex_lock(&acct_on_mutex);
 		error = acct_on(tmp);
+		mutex_unlock(&acct_on_mutex);
 		putname(tmp);
 	} else {
-		struct bsd_acct_struct *acct;
-
-		acct = task_active_pid_ns(current)->bacct;
-		if (acct == NULL)
-			return 0;
-
-		spin_lock(&acct_lock);
-		acct_file_reopen(acct, NULL, NULL);
-		spin_unlock(&acct_lock);
+		acct_kill(acct_get(task_active_pid_ns(current)), NULL);
 	}
 
 	return error;
 }
 
-/**
- * acct_auto_close - turn off a filesystem's accounting if it is on
- * @m: vfsmount being shut down
- *
- * If the accounting is turned on for a file in the subtree pointed to
- * to by m, turn accounting off.  Done when m is about to die.
- */
-void acct_auto_close_mnt(struct vfsmount *m)
-{
-	struct bsd_acct_struct *acct;
-
-	spin_lock(&acct_lock);
-restart:
-	list_for_each_entry(acct, &acct_list, list)
-		if (acct->file && acct->file->f_path.mnt == m) {
-			acct_file_reopen(acct, NULL, NULL);
-			goto restart;
-		}
-	spin_unlock(&acct_lock);
-}
-
-/**
- * acct_auto_close - turn off a filesystem's accounting if it is on
- * @sb: super block for the filesystem
- *
- * If the accounting is turned on for a file in the filesystem pointed
- * to by sb, turn accounting off.
- */
-void acct_auto_close(struct super_block *sb)
-{
-	struct bsd_acct_struct *acct;
-
-	spin_lock(&acct_lock);
-restart:
-	list_for_each_entry(acct, &acct_list, list)
-		if (acct->file && acct->file->f_path.dentry->d_sb == sb) {
-			acct_file_reopen(acct, NULL, NULL);
-			goto restart;
-		}
-	spin_unlock(&acct_lock);
-}
-
 void acct_exit_ns(struct pid_namespace *ns)
 {
-	struct bsd_acct_struct *acct = ns->bacct;
-
-	if (acct == NULL)
-		return;
-
-	spin_lock(&acct_lock);
-	if (acct->file != NULL)
-		acct_file_reopen(acct, NULL, NULL);
-	spin_unlock(&acct_lock);
-
-	kfree(acct);
+	acct_kill(acct_get(ns), NULL);
 }
 
 /*
@@ -450,38 +411,20 @@
  *  do_exit() or when switching to a different output file.
  */
 
-/*
- *  do_acct_process does all actual work. Caller holds the reference to file.
- */
-static void do_acct_process(struct bsd_acct_struct *acct,
-		struct pid_namespace *ns, struct file *file)
+static void fill_ac(acct_t *ac)
 {
 	struct pacct_struct *pacct = &current->signal->pacct;
-	acct_t ac;
-	mm_segment_t fs;
-	unsigned long flim;
 	u64 elapsed, run_time;
 	struct tty_struct *tty;
-	const struct cred *orig_cred;
-
-	/* Perform file operations on behalf of whoever enabled accounting */
-	orig_cred = override_creds(file->f_cred);
-
-	/*
-	 * First check to see if there is enough free_space to continue
-	 * the process accounting system.
-	 */
-	if (!check_free_space(acct, file))
-		goto out;
 
 	/*
 	 * Fill the accounting struct with the needed info as recorded
 	 * by the different kernel functions.
 	 */
-	memset(&ac, 0, sizeof(acct_t));
+	memset(ac, 0, sizeof(acct_t));
 
-	ac.ac_version = ACCT_VERSION | ACCT_BYTEORDER;
-	strlcpy(ac.ac_comm, current->comm, sizeof(ac.ac_comm));
+	ac->ac_version = ACCT_VERSION | ACCT_BYTEORDER;
+	strlcpy(ac->ac_comm, current->comm, sizeof(ac->ac_comm));
 
 	/* calculate run_time in nsec*/
 	run_time = ktime_get_ns();
@@ -489,9 +432,9 @@
 	/* convert nsec -> AHZ */
 	elapsed = nsec_to_AHZ(run_time);
 #if ACCT_VERSION == 3
-	ac.ac_etime = encode_float(elapsed);
+	ac->ac_etime = encode_float(elapsed);
 #else
-	ac.ac_etime = encode_comp_t(elapsed < (unsigned long) -1l ?
+	ac->ac_etime = encode_comp_t(elapsed < (unsigned long) -1l ?
 				(unsigned long) elapsed : (unsigned long) -1l);
 #endif
 #if ACCT_VERSION == 1 || ACCT_VERSION == 2
@@ -499,18 +442,58 @@
 		/* new enlarged etime field */
 		comp2_t etime = encode_comp2_t(elapsed);
 
-		ac.ac_etime_hi = etime >> 16;
-		ac.ac_etime_lo = (u16) etime;
+		ac->ac_etime_hi = etime >> 16;
+		ac->ac_etime_lo = (u16) etime;
 	}
 #endif
 	do_div(elapsed, AHZ);
-	ac.ac_btime = get_seconds() - elapsed;
+	ac->ac_btime = get_seconds() - elapsed;
+#if ACCT_VERSION==2
+	ac->ac_ahz = AHZ;
+#endif
+
+	spin_lock_irq(&current->sighand->siglock);
+	tty = current->signal->tty;	/* Safe as we hold the siglock */
+	ac->ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
+	ac->ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
+	ac->ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
+	ac->ac_flag = pacct->ac_flag;
+	ac->ac_mem = encode_comp_t(pacct->ac_mem);
+	ac->ac_minflt = encode_comp_t(pacct->ac_minflt);
+	ac->ac_majflt = encode_comp_t(pacct->ac_majflt);
+	ac->ac_exitcode = pacct->ac_exitcode;
+	spin_unlock_irq(&current->sighand->siglock);
+}
+/*
+ *  do_acct_process does all actual work. Caller holds the reference to file.
+ */
+static void do_acct_process(struct bsd_acct_struct *acct)
+{
+	acct_t ac;
+	unsigned long flim;
+	const struct cred *orig_cred;
+	struct pid_namespace *ns = acct->ns;
+	struct file *file = acct->file;
+
+	/*
+	 * Accounting records are not subject to resource limits.
+	 */
+	flim = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
+	/* Perform file operations on behalf of whoever enabled accounting */
+	orig_cred = override_creds(file->f_cred);
+
+	/*
+	 * First check to see if there is enough free_space to continue
+	 * the process accounting system.
+	 */
+	if (!check_free_space(acct))
+		goto out;
+
+	fill_ac(&ac);
 	/* we really need to bite the bullet and change layout */
 	ac.ac_uid = from_kuid_munged(file->f_cred->user_ns, orig_cred->uid);
 	ac.ac_gid = from_kgid_munged(file->f_cred->user_ns, orig_cred->gid);
-#if ACCT_VERSION == 2
-	ac.ac_ahz = AHZ;
-#endif
 #if ACCT_VERSION == 1 || ACCT_VERSION == 2
 	/* backward-compatible 16 bit fields */
 	ac.ac_uid16 = ac.ac_uid;
@@ -522,45 +505,18 @@
 	ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent), ns);
 	rcu_read_unlock();
 #endif
-
-	spin_lock_irq(&current->sighand->siglock);
-	tty = current->signal->tty;	/* Safe as we hold the siglock */
-	ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
-	ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
-	ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
-	ac.ac_flag = pacct->ac_flag;
-	ac.ac_mem = encode_comp_t(pacct->ac_mem);
-	ac.ac_minflt = encode_comp_t(pacct->ac_minflt);
-	ac.ac_majflt = encode_comp_t(pacct->ac_majflt);
-	ac.ac_exitcode = pacct->ac_exitcode;
-	spin_unlock_irq(&current->sighand->siglock);
-	ac.ac_io = encode_comp_t(0 /* current->io_usage */);	/* %% */
-	ac.ac_rw = encode_comp_t(ac.ac_io / 1024);
-	ac.ac_swaps = encode_comp_t(0);
-
 	/*
 	 * Get freeze protection. If the fs is frozen, just skip the write
 	 * as we could deadlock the system otherwise.
 	 */
-	if (!file_start_write_trylock(file))
-		goto out;
-	/*
-	 * Kernel segment override to datasegment and write it
-	 * to the accounting file.
-	 */
-	fs = get_fs();
-	set_fs(KERNEL_DS);
-	/*
-	 * Accounting records are not subject to resource limits.
-	 */
-	flim = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
-	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
-	file->f_op->write(file, (char *)&ac,
-			       sizeof(acct_t), &file->f_pos);
-	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = flim;
-	set_fs(fs);
-	file_end_write(file);
+	if (file_start_write_trylock(file)) {
+		/* it's been opened O_APPEND, so position is irrelevant */
+		loff_t pos = 0;
+		__kernel_write(file, (char *)&ac, sizeof(acct_t), &pos);
+		file_end_write(file);
+	}
 out:
+	current->signal->rlim[RLIMIT_FSIZE].rlim_cur = flim;
 	revert_creds(orig_cred);
 }
 
@@ -609,34 +565,20 @@
 	spin_unlock_irq(&current->sighand->siglock);
 }
 
-static void acct_process_in_ns(struct pid_namespace *ns)
+static void slow_acct_process(struct pid_namespace *ns)
 {
-	struct file *file = NULL;
-	struct bsd_acct_struct *acct;
-
-	acct = ns->bacct;
-	/*
-	 * accelerate the common fastpath:
-	 */
-	if (!acct || !acct->file)
-		return;
-
-	spin_lock(&acct_lock);
-	file = acct->file;
-	if (unlikely(!file)) {
-		spin_unlock(&acct_lock);
-		return;
+	for ( ; ns; ns = ns->parent) {
+		struct bsd_acct_struct *acct = acct_get(ns);
+		if (acct) {
+			do_acct_process(acct);
+			mutex_unlock(&acct->lock);
+			pin_put(&acct->pin);
+		}
 	}
-	get_file(file);
-	spin_unlock(&acct_lock);
-
-	do_acct_process(acct, ns, file);
-	fput(file);
 }
 
 /**
- * acct_process - now just a wrapper around acct_process_in_ns,
- * which in turn is a wrapper around do_acct_process.
+ * acct_process
  *
  * handles process accounting for an exiting task
  */
@@ -649,6 +591,10 @@
 	 * alive and holds its namespace, which in turn holds
 	 * its parent.
 	 */
-	for (ns = task_active_pid_ns(current); ns != NULL; ns = ns->parent)
-		acct_process_in_ns(ns);
+	for (ns = task_active_pid_ns(current); ns != NULL; ns = ns->parent) {
+		if (ns->bacct)
+			break;
+	}
+	if (unlikely(ns))
+		slow_acct_process(ns);
 }
diff --git a/kernel/fork.c b/kernel/fork.c
index 1380d8a..0cf9cdb 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1105,7 +1105,7 @@
 	 * needed because this new task is not yet running and cannot
 	 * be racing exec.
 	 */
-	BUG_ON(!spin_is_locked(&current->sighand->siglock));
+	assert_spin_locked(&current->sighand->siglock);
 
 	/* Ref-count the new filter user, and assign it. */
 	get_seccomp_filter(current);
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index de1a6bb..e04c455 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -272,6 +272,18 @@
 static char *log_buf = __log_buf;
 static u32 log_buf_len = __LOG_BUF_LEN;
 
+/* Return log buffer address */
+char *log_buf_addr_get(void)
+{
+	return log_buf;
+}
+
+/* Return log buffer size */
+u32 log_buf_len_get(void)
+{
+	return log_buf_len;
+}
+
 /* human readable text of the record */
 static char *log_text(const struct printk_log *msg)
 {
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 25b0043..44eb005 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -203,7 +203,7 @@
 
 static inline bool seccomp_may_assign_mode(unsigned long seccomp_mode)
 {
-	BUG_ON(!spin_is_locked(&current->sighand->siglock));
+	assert_spin_locked(&current->sighand->siglock);
 
 	if (current->seccomp.mode && current->seccomp.mode != seccomp_mode)
 		return false;
@@ -214,7 +214,7 @@
 static inline void seccomp_assign_mode(struct task_struct *task,
 				       unsigned long seccomp_mode)
 {
-	BUG_ON(!spin_is_locked(&task->sighand->siglock));
+	assert_spin_locked(&task->sighand->siglock);
 
 	task->seccomp.mode = seccomp_mode;
 	/*
@@ -253,7 +253,7 @@
 	struct task_struct *thread, *caller;
 
 	BUG_ON(!mutex_is_locked(&current->signal->cred_guard_mutex));
-	BUG_ON(!spin_is_locked(&current->sighand->siglock));
+	assert_spin_locked(&current->sighand->siglock);
 
 	/* Validate all threads being eligible for synchronization. */
 	caller = current;
@@ -294,7 +294,7 @@
 	struct task_struct *thread, *caller;
 
 	BUG_ON(!mutex_is_locked(&current->signal->cred_guard_mutex));
-	BUG_ON(!spin_is_locked(&current->sighand->siglock));
+	assert_spin_locked(&current->sighand->siglock);
 
 	/* Synchronize all threads. */
 	caller = current;
@@ -464,7 +464,7 @@
 	unsigned long total_insns;
 	struct seccomp_filter *walker;
 
-	BUG_ON(!spin_is_locked(&current->sighand->siglock));
+	assert_spin_locked(&current->sighand->siglock);
 
 	/* Validate resulting filter length. */
 	total_insns = filter->prog->len;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index f36b028..fb4a9c2 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -338,10 +338,11 @@
 
 static inline void update_vsyscall(struct timekeeper *tk)
 {
-	struct timespec xt;
+	struct timespec xt, wm;
 
 	xt = timespec64_to_timespec(tk_xtime(tk));
-	update_vsyscall_old(&xt, &tk->wall_to_monotonic, tk->tkr.clock, tk->tkr.mult,
+	wm = timespec64_to_timespec(tk->wall_to_monotonic);
+	update_vsyscall_old(&xt, &wm, tk->tkr.clock, tk->tkr.mult,
 			    tk->tkr.cycle_last);
 }
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index cb45f59..07c2832 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -143,6 +143,30 @@
 	  DEBUG_INFO build and compile times are reduced too.
 	  Only works with newer gcc versions.
 
+config DEBUG_INFO_SPLIT
+	bool "Produce split debuginfo in .dwo files"
+	depends on DEBUG_INFO
+	help
+	  Generate debug info into separate .dwo files. This significantly
+	  reduces the build directory size for builds with DEBUG_INFO,
+	  because it stores the information only once on disk in .dwo
+	  files instead of multiple times in object files and executables.
+	  In addition the debug information is also compressed.
+
+	  Requires recent gcc (4.7+) and recent gdb/binutils.
+	  Any tool that packages or reads debug information would need
+	  to know about the .dwo files and include them.
+	  Incompatible with older versions of ccache.
+
+config DEBUG_INFO_DWARF4
+	bool "Generate dwarf4 debuginfo"
+	depends on DEBUG_INFO
+	help
+	  Generate dwarf4 debug info. This requires recent versions
+	  of gcc and gdb. It makes the debug information larger.
+	  But it significantly improves the success of resolving
+	  variables in gdb on optimized code.
+
 config ENABLE_WARN_DEPRECATED
 	bool "Enable __deprecated logic"
 	default y
diff --git a/lib/lru_cache.c b/lib/lru_cache.c
index 4a83ecd..852c81e 100644
--- a/lib/lru_cache.c
+++ b/lib/lru_cache.c
@@ -169,7 +169,7 @@
 	return NULL;
 }
 
-void lc_free_by_index(struct lru_cache *lc, unsigned i)
+static void lc_free_by_index(struct lru_cache *lc, unsigned i)
 {
 	void *p = lc->lc_element[i];
 	WARN_ON(!p);
@@ -643,9 +643,10 @@
  * lc_dump - Dump a complete LRU cache to seq in textual form.
  * @lc: the lru cache to operate on
  * @seq: the &struct seq_file pointer to seq_printf into
- * @utext: user supplied "heading" or other info
+ * @utext: user supplied additional "heading" or other info
  * @detail: function pointer the user may provide to dump further details
- * of the object the lc_element is embedded in.
+ * of the object the lc_element is embedded in. May be NULL.
+ * Note: a leading space ' ' and trailing newline '\n' is implied.
  */
 void lc_seq_dump_details(struct seq_file *seq, struct lru_cache *lc, char *utext,
 	     void (*detail) (struct seq_file *, struct lc_element *))
@@ -654,16 +655,18 @@
 	struct lc_element *e;
 	int i;
 
-	seq_printf(seq, "\tnn: lc_number refcnt %s\n ", utext);
+	seq_printf(seq, "\tnn: lc_number (new nr) refcnt %s\n ", utext);
 	for (i = 0; i < nr_elements; i++) {
 		e = lc_element_by_index(lc, i);
-		if (e->lc_number == LC_FREE) {
-			seq_printf(seq, "\t%2d: FREE\n", i);
-		} else {
-			seq_printf(seq, "\t%2d: %4u %4u    ", i,
-				   e->lc_number, e->refcnt);
+		if (e->lc_number != e->lc_new_number)
+			seq_printf(seq, "\t%5d: %6d %8d %6d ",
+				i, e->lc_number, e->lc_new_number, e->refcnt);
+		else
+			seq_printf(seq, "\t%5d: %6d %-8s %6d ",
+				i, e->lc_number, "-\"-", e->refcnt);
+		if (detail)
 			detail(seq, e);
-		}
+		seq_putc(seq, '\n');
 	}
 }
 
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index e6940cf..a2c7881 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -38,16 +38,10 @@
 EXPORT_SYMBOL_GPL(lockdep_rht_mutex_is_held);
 #endif
 
-/**
- * rht_obj - cast hash head to outer object
- * @ht:		hash table
- * @he:		hashed node
- */
-void *rht_obj(const struct rhashtable *ht, const struct rhash_head *he)
+static void *rht_obj(const struct rhashtable *ht, const struct rhash_head *he)
 {
 	return (void *) he - ht->p.head_offset;
 }
-EXPORT_SYMBOL_GPL(rht_obj);
 
 static u32 __hashfn(const struct rhashtable *ht, const void *key,
 		      u32 len, u32 hsize)
@@ -386,7 +380,7 @@
  * deletion when combined with walking or lookup.
  */
 void rhashtable_remove_pprev(struct rhashtable *ht, struct rhash_head *obj,
-			     struct rhash_head **pprev, gfp_t flags)
+			     struct rhash_head __rcu **pprev, gfp_t flags)
 {
 	struct bucket_table *tbl = rht_dereference(ht->tbl, ht);
 
diff --git a/mm/filemap.c b/mm/filemap.c
index f501b56..90effcd 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2602,7 +2602,7 @@
 		 * that this differs from normal direct-io semantics, which
 		 * will return -EFOO even if some bytes were written.
 		 */
-		if (unlikely(status < 0) && !written) {
+		if (unlikely(status < 0)) {
 			err = status;
 			goto out;
 		}
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index 9aae6f4..9eebfad 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -275,6 +275,7 @@
 		ret = res_counter_memparse_write_strategy(buf, &val);
 		if (ret)
 			break;
+		val = ALIGN(val, 1ULL << huge_page_shift(&hstates[idx]));
 		ret = res_counter_set_limit(&h_cg->hugepage[idx], val);
 		break;
 	default:
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index 7b5dbd1..ab88dc0 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -310,7 +310,7 @@
 EXPORT_SYMBOL(iov_iter_init);
 
 static ssize_t get_pages_iovec(struct iov_iter *i,
-		   struct page **pages, size_t maxsize,
+		   struct page **pages, unsigned maxpages,
 		   size_t *start)
 {
 	size_t offset = i->iov_offset;
@@ -323,10 +323,10 @@
 	len = iov->iov_len - offset;
 	if (len > i->count)
 		len = i->count;
-	if (len > maxsize)
-		len = maxsize;
 	addr = (unsigned long)iov->iov_base + offset;
 	len += *start = addr & (PAGE_SIZE - 1);
+	if (len > maxpages * PAGE_SIZE)
+		len = maxpages * PAGE_SIZE;
 	addr &= ~(PAGE_SIZE - 1);
 	n = (len + PAGE_SIZE - 1) / PAGE_SIZE;
 	res = get_user_pages_fast(addr, n, (i->type & WRITE) != WRITE, pages);
@@ -588,15 +588,14 @@
 }
 
 static ssize_t get_pages_bvec(struct iov_iter *i,
-		   struct page **pages, size_t maxsize,
+		   struct page **pages, unsigned maxpages,
 		   size_t *start)
 {
 	const struct bio_vec *bvec = i->bvec;
 	size_t len = bvec->bv_len - i->iov_offset;
 	if (len > i->count)
 		len = i->count;
-	if (len > maxsize)
-		len = maxsize;
+	/* can't be more than PAGE_SIZE */
 	*start = bvec->bv_offset + i->iov_offset;
 
 	get_page(*pages = bvec->bv_page);
@@ -712,13 +711,13 @@
 EXPORT_SYMBOL(iov_iter_alignment);
 
 ssize_t iov_iter_get_pages(struct iov_iter *i,
-		   struct page **pages, size_t maxsize,
+		   struct page **pages, unsigned maxpages,
 		   size_t *start)
 {
 	if (i->type & ITER_BVEC)
-		return get_pages_bvec(i, pages, maxsize, start);
+		return get_pages_bvec(i, pages, maxpages, start);
 	else
-		return get_pages_iovec(i, pages, maxsize, start);
+		return get_pages_iovec(i, pages, maxpages, start);
 }
 EXPORT_SYMBOL(iov_iter_get_pages);
 
diff --git a/mm/shmem.c b/mm/shmem.c
index a42add1..0e5fb22 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2323,17 +2323,45 @@
 	return shmem_unlink(dir, dentry);
 }
 
+static int shmem_exchange(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry)
+{
+	bool old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
+	bool new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
+
+	if (old_dir != new_dir && old_is_dir != new_is_dir) {
+		if (old_is_dir) {
+			drop_nlink(old_dir);
+			inc_nlink(new_dir);
+		} else {
+			drop_nlink(new_dir);
+			inc_nlink(old_dir);
+		}
+	}
+	old_dir->i_ctime = old_dir->i_mtime =
+	new_dir->i_ctime = new_dir->i_mtime =
+	old_dentry->d_inode->i_ctime =
+	new_dentry->d_inode->i_ctime = CURRENT_TIME;
+
+	return 0;
+}
+
 /*
  * The VFS layer already does all the dentry stuff for rename,
  * we just have to decrement the usage count for the target if
  * it exists so that the VFS layer correctly free's it when it
  * gets overwritten.
  */
-static int shmem_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry)
+static int shmem_rename2(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags)
 {
 	struct inode *inode = old_dentry->d_inode;
 	int they_are_dirs = S_ISDIR(inode->i_mode);
 
+	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+		return -EINVAL;
+
+	if (flags & RENAME_EXCHANGE)
+		return shmem_exchange(old_dir, old_dentry, new_dir, new_dentry);
+
 	if (!simple_empty(new_dentry))
 		return -ENOTEMPTY;
 
@@ -3087,7 +3115,7 @@
 	.mkdir		= shmem_mkdir,
 	.rmdir		= shmem_rmdir,
 	.mknod		= shmem_mknod,
-	.rename		= shmem_rename,
+	.rename2	= shmem_rename2,
 	.tmpfile	= shmem_tmpfile,
 #endif
 #ifdef CONFIG_TMPFS_XATTR
diff --git a/net/6lowpan/Kconfig b/net/6lowpan/Kconfig
index 028a5c6..e4a02ef 100644
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -1,5 +1,5 @@
 config 6LOWPAN
-	bool "6LoWPAN Support"
+	tristate "6LoWPAN Support"
 	depends on IPV6
 	---help---
 	  This enables IPv6 over Low power Wireless Personal Area Network -
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 75d4277..90cc2bd 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -112,59 +112,6 @@
 }
 EXPORT_SYMBOL(vlan_dev_vlan_proto);
 
-static struct sk_buff *vlan_reorder_header(struct sk_buff *skb)
-{
-	if (skb_cow(skb, skb_headroom(skb)) < 0) {
-		kfree_skb(skb);
-		return NULL;
-	}
-
-	memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN);
-	skb->mac_header += VLAN_HLEN;
-	return skb;
-}
-
-struct sk_buff *vlan_untag(struct sk_buff *skb)
-{
-	struct vlan_hdr *vhdr;
-	u16 vlan_tci;
-
-	if (unlikely(vlan_tx_tag_present(skb))) {
-		/* vlan_tci is already set-up so leave this for another time */
-		return skb;
-	}
-
-	skb = skb_share_check(skb, GFP_ATOMIC);
-	if (unlikely(!skb))
-		goto err_free;
-
-	if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
-		goto err_free;
-
-	vhdr = (struct vlan_hdr *) skb->data;
-	vlan_tci = ntohs(vhdr->h_vlan_TCI);
-	__vlan_hwaccel_put_tag(skb, skb->protocol, vlan_tci);
-
-	skb_pull_rcsum(skb, VLAN_HLEN);
-	vlan_set_encap_proto(skb, vhdr);
-
-	skb = vlan_reorder_header(skb);
-	if (unlikely(!skb))
-		goto err_free;
-
-	skb_reset_network_header(skb);
-	skb_reset_transport_header(skb);
-	skb_reset_mac_len(skb);
-
-	return skb;
-
-err_free:
-	kfree_skb(skb);
-	return NULL;
-}
-EXPORT_SYMBOL(vlan_untag);
-
-
 /*
  * vlan info and vid list
  */
diff --git a/net/atm/lec.c b/net/atm/lec.c
index 4c5b8ba..e4853b5 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -833,7 +833,6 @@
 			  loff_t *l)
 {
 	struct hlist_node *e = state->node;
-	struct lec_arp_table *tmp;
 
 	if (!e)
 		e = tbl->first;
@@ -842,9 +841,7 @@
 		--*l;
 	}
 
-	tmp = container_of(e, struct lec_arp_table, next);
-
-	hlist_for_each_entry_from(tmp, next) {
+	for (; e; e = e->next) {
 		if (--*l < 0)
 			break;
 	}
diff --git a/net/atm/svc.c b/net/atm/svc.c
index d8e5d0c2..1ba23f5 100644
--- a/net/atm/svc.c
+++ b/net/atm/svc.c
@@ -50,12 +50,12 @@
 
 	pr_debug("%p\n", vcc);
 	if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
-		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 		sigd_enq(vcc, as_close, NULL, NULL, NULL);
-		while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
+		for (;;) {
+			prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+			if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
+				break;
 			schedule();
-			prepare_to_wait(sk_sleep(sk), &wait,
-					TASK_UNINTERRUPTIBLE);
 		}
 		finish_wait(sk_sleep(sk), &wait);
 	}
@@ -126,11 +126,12 @@
 	}
 	vcc->local = *addr;
 	set_bit(ATM_VF_WAITING, &vcc->flags);
-	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 	sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
-	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
-		schedule();
+	for (;;) {
 		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+			break;
+		schedule();
 	}
 	finish_wait(sk_sleep(sk), &wait);
 	clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
@@ -202,15 +203,14 @@
 		}
 		vcc->remote = *addr;
 		set_bit(ATM_VF_WAITING, &vcc->flags);
-		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 		sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
 		if (flags & O_NONBLOCK) {
-			finish_wait(sk_sleep(sk), &wait);
 			sock->state = SS_CONNECTING;
 			error = -EINPROGRESS;
 			goto out;
 		}
 		error = 0;
+		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 		while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 			schedule();
 			if (!signal_pending(current)) {
@@ -297,11 +297,12 @@
 		goto out;
 	}
 	set_bit(ATM_VF_WAITING, &vcc->flags);
-	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 	sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
-	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
-		schedule();
+	for (;;) {
 		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+			break;
+		schedule();
 	}
 	finish_wait(sk_sleep(sk), &wait);
 	if (!sigd) {
@@ -387,15 +388,15 @@
 		}
 		/* wait should be short, so we ignore the non-blocking flag */
 		set_bit(ATM_VF_WAITING, &new_vcc->flags);
-		prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
-				TASK_UNINTERRUPTIBLE);
 		sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
-		while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
+		for (;;) {
+			prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
+					TASK_UNINTERRUPTIBLE);
+			if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
+				break;
 			release_sock(sk);
 			schedule();
 			lock_sock(sk);
-			prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
-					TASK_UNINTERRUPTIBLE);
 		}
 		finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
 		if (!sigd) {
@@ -433,12 +434,14 @@
 	DEFINE_WAIT(wait);
 
 	set_bit(ATM_VF_WAITING, &vcc->flags);
-	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 	sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
-	while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
-	       !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
-		schedule();
+	for (;;) {
 		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+		if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
+		    test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
+			break;
+		}
+		schedule();
 	}
 	finish_wait(sk_sleep(sk), &wait);
 	if (!sigd)
@@ -529,18 +532,18 @@
 
 	lock_sock(sk);
 	set_bit(ATM_VF_WAITING, &vcc->flags);
-	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 	sigd_enq(vcc, as_addparty, NULL, NULL,
 		 (struct sockaddr_atmsvc *) sockaddr);
 	if (flags & O_NONBLOCK) {
-		finish_wait(sk_sleep(sk), &wait);
 		error = -EINPROGRESS;
 		goto out;
 	}
 	pr_debug("added wait queue\n");
-	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
-		schedule();
+	for (;;) {
 		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+			break;
+		schedule();
 	}
 	finish_wait(sk_sleep(sk), &wait);
 	error = xchg(&sk->sk_err_soft, 0);
@@ -558,11 +561,12 @@
 
 	lock_sock(sk);
 	set_bit(ATM_VF_WAITING, &vcc->flags);
-	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
-	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
-		schedule();
+	for (;;) {
 		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+			break;
+		schedule();
 	}
 	finish_wait(sk_sleep(sk), &wait);
 	if (!sigd) {
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index 96b66fd..ab6bb2a 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -20,7 +20,6 @@
 #include "originator.h"
 #include "hard-interface.h"
 #include "translation-table.h"
-#include "multicast.h"
 
 /**
  * batadv_mcast_mla_softif_get - get softif multicast listeners
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index febb0f8..e1bcd65 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -181,7 +181,7 @@
 	 */
 	if (unlikely(!vlan_tx_tag_present(skb) &&
 		     skb->protocol == proto)) {
-		skb = vlan_untag(skb);
+		skb = skb_vlan_untag(skb);
 		if (unlikely(!skb))
 			return false;
 	}
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 1059ed3..6d69631 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -327,10 +327,7 @@
 		char name[EBT_FUNCTION_MAXNAMELEN];
 	} *e;
 
-	*error = mutex_lock_interruptible(mutex);
-	if (*error != 0)
-		return NULL;
-
+	mutex_lock(mutex);
 	list_for_each_entry(e, head, list) {
 		if (strcmp(e->name, name) == 0)
 			return e;
@@ -1203,10 +1200,7 @@
 
 	table->private = newinfo;
 	rwlock_init(&table->lock);
-	ret = mutex_lock_interruptible(&ebt_mutex);
-	if (ret != 0)
-		goto free_chainstack;
-
+	mutex_lock(&ebt_mutex);
 	list_for_each_entry(t, &net->xt.tables[NFPROTO_BRIDGE], list) {
 		if (strcmp(t->name, table->name) == 0) {
 			ret = -EEXIST;
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 1948d59..b2f571d 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -174,6 +174,7 @@
 #define SKIP_BUF_SIZE	1024
 
 static void queue_con(struct ceph_connection *con);
+static void cancel_con(struct ceph_connection *con);
 static void con_work(struct work_struct *);
 static void con_fault(struct ceph_connection *con);
 
@@ -680,7 +681,7 @@
 
 	reset_connection(con);
 	con->peer_global_seq = 0;
-	cancel_delayed_work(&con->work);
+	cancel_con(con);
 	con_close_socket(con);
 	mutex_unlock(&con->mutex);
 }
@@ -900,7 +901,7 @@
 	BUG_ON(page_count > (int)USHRT_MAX);
 	cursor->page_count = (unsigned short)page_count;
 	BUG_ON(length > SIZE_MAX - cursor->page_offset);
-	cursor->last_piece = (size_t)cursor->page_offset + length <= PAGE_SIZE;
+	cursor->last_piece = cursor->page_offset + cursor->resid <= PAGE_SIZE;
 }
 
 static struct page *
@@ -2667,19 +2668,16 @@
 {
 	if (!con->ops->get(con)) {
 		dout("%s %p ref count 0\n", __func__, con);
-
 		return -ENOENT;
 	}
 
 	if (!queue_delayed_work(ceph_msgr_wq, &con->work, delay)) {
 		dout("%s %p - already queued\n", __func__, con);
 		con->ops->put(con);
-
 		return -EBUSY;
 	}
 
 	dout("%s %p %lu\n", __func__, con, delay);
-
 	return 0;
 }
 
@@ -2688,6 +2686,14 @@
 	(void) queue_con_delay(con, 0);
 }
 
+static void cancel_con(struct ceph_connection *con)
+{
+	if (cancel_delayed_work(&con->work)) {
+		dout("%s %p\n", __func__, con);
+		con->ops->put(con);
+	}
+}
+
 static bool con_sock_closed(struct ceph_connection *con)
 {
 	if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED))
@@ -3269,24 +3275,21 @@
 /*
  * Free a generically kmalloc'd message.
  */
-void ceph_msg_kfree(struct ceph_msg *m)
+static void ceph_msg_free(struct ceph_msg *m)
 {
-	dout("msg_kfree %p\n", m);
+	dout("%s %p\n", __func__, m);
 	ceph_kvfree(m->front.iov_base);
 	kmem_cache_free(ceph_msg_cache, m);
 }
 
-/*
- * Drop a msg ref.  Destroy as needed.
- */
-void ceph_msg_last_put(struct kref *kref)
+static void ceph_msg_release(struct kref *kref)
 {
 	struct ceph_msg *m = container_of(kref, struct ceph_msg, kref);
 	LIST_HEAD(data);
 	struct list_head *links;
 	struct list_head *next;
 
-	dout("ceph_msg_put last one on %p\n", m);
+	dout("%s %p\n", __func__, m);
 	WARN_ON(!list_empty(&m->list_head));
 
 	/* drop middle, data, if any */
@@ -3308,9 +3311,25 @@
 	if (m->pool)
 		ceph_msgpool_put(m->pool, m);
 	else
-		ceph_msg_kfree(m);
+		ceph_msg_free(m);
 }
-EXPORT_SYMBOL(ceph_msg_last_put);
+
+struct ceph_msg *ceph_msg_get(struct ceph_msg *msg)
+{
+	dout("%s %p (was %d)\n", __func__, msg,
+	     atomic_read(&msg->kref.refcount));
+	kref_get(&msg->kref);
+	return msg;
+}
+EXPORT_SYMBOL(ceph_msg_get);
+
+void ceph_msg_put(struct ceph_msg *msg)
+{
+	dout("%s %p (was %d)\n", __func__, msg,
+	     atomic_read(&msg->kref.refcount));
+	kref_put(&msg->kref, ceph_msg_release);
+}
+EXPORT_SYMBOL(ceph_msg_put);
 
 void ceph_msg_dump(struct ceph_msg *msg)
 {
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 05be0c1..30f6faf 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -297,12 +297,21 @@
 /*
  * requests
  */
-void ceph_osdc_release_request(struct kref *kref)
+static void ceph_osdc_release_request(struct kref *kref)
 {
-	struct ceph_osd_request *req;
+	struct ceph_osd_request *req = container_of(kref,
+					    struct ceph_osd_request, r_kref);
 	unsigned int which;
 
-	req = container_of(kref, struct ceph_osd_request, r_kref);
+	dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
+	     req->r_request, req->r_reply);
+	WARN_ON(!RB_EMPTY_NODE(&req->r_node));
+	WARN_ON(!list_empty(&req->r_req_lru_item));
+	WARN_ON(!list_empty(&req->r_osd_item));
+	WARN_ON(!list_empty(&req->r_linger_item));
+	WARN_ON(!list_empty(&req->r_linger_osd_item));
+	WARN_ON(req->r_osd);
+
 	if (req->r_request)
 		ceph_msg_put(req->r_request);
 	if (req->r_reply) {
@@ -320,7 +329,22 @@
 		kmem_cache_free(ceph_osd_request_cache, req);
 
 }
-EXPORT_SYMBOL(ceph_osdc_release_request);
+
+void ceph_osdc_get_request(struct ceph_osd_request *req)
+{
+	dout("%s %p (was %d)\n", __func__, req,
+	     atomic_read(&req->r_kref.refcount));
+	kref_get(&req->r_kref);
+}
+EXPORT_SYMBOL(ceph_osdc_get_request);
+
+void ceph_osdc_put_request(struct ceph_osd_request *req)
+{
+	dout("%s %p (was %d)\n", __func__, req,
+	     atomic_read(&req->r_kref.refcount));
+	kref_put(&req->r_kref, ceph_osdc_release_request);
+}
+EXPORT_SYMBOL(ceph_osdc_put_request);
 
 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 					       struct ceph_snap_context *snapc,
@@ -364,7 +388,7 @@
 	RB_CLEAR_NODE(&req->r_node);
 	INIT_LIST_HEAD(&req->r_unsafe_item);
 	INIT_LIST_HEAD(&req->r_linger_item);
-	INIT_LIST_HEAD(&req->r_linger_osd);
+	INIT_LIST_HEAD(&req->r_linger_osd_item);
 	INIT_LIST_HEAD(&req->r_req_lru_item);
 	INIT_LIST_HEAD(&req->r_osd_item);
 
@@ -916,7 +940,7 @@
 	 * list at the end to keep things in tid order.
 	 */
 	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
-				 r_linger_osd) {
+				 r_linger_osd_item) {
 		/*
 		 * reregister request prior to unregistering linger so
 		 * that r_osd is preserved.
@@ -1008,6 +1032,8 @@
 {
 	dout("__remove_osd %p\n", osd);
 	BUG_ON(!list_empty(&osd->o_requests));
+	BUG_ON(!list_empty(&osd->o_linger_requests));
+
 	rb_erase(&osd->o_node, &osdc->osds);
 	list_del_init(&osd->o_osd_lru);
 	ceph_con_close(&osd->o_con);
@@ -1029,12 +1055,23 @@
 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
 			      struct ceph_osd *osd)
 {
-	dout("__move_osd_to_lru %p\n", osd);
+	dout("%s %p\n", __func__, osd);
 	BUG_ON(!list_empty(&osd->o_osd_lru));
+
 	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
 	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
 }
 
+static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
+				  struct ceph_osd *osd)
+{
+	dout("%s %p\n", __func__, osd);
+
+	if (list_empty(&osd->o_requests) &&
+	    list_empty(&osd->o_linger_requests))
+		__move_osd_to_lru(osdc, osd);
+}
+
 static void __remove_osd_from_lru(struct ceph_osd *osd)
 {
 	dout("__remove_osd_from_lru %p\n", osd);
@@ -1175,6 +1212,7 @@
 
 	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
 	rb_erase(&req->r_node, &osdc->requests);
+	RB_CLEAR_NODE(&req->r_node);
 	osdc->num_requests--;
 
 	if (req->r_osd) {
@@ -1182,12 +1220,8 @@
 		ceph_msg_revoke(req->r_request);
 
 		list_del_init(&req->r_osd_item);
-		if (list_empty(&req->r_osd->o_requests) &&
-		    list_empty(&req->r_osd->o_linger_requests)) {
-			dout("moving osd to %p lru\n", req->r_osd);
-			__move_osd_to_lru(osdc, req->r_osd);
-		}
-		if (list_empty(&req->r_linger_item))
+		maybe_move_osd_to_lru(osdc, req->r_osd);
+		if (list_empty(&req->r_linger_osd_item))
 			req->r_osd = NULL;
 	}
 
@@ -1214,45 +1248,39 @@
 static void __register_linger_request(struct ceph_osd_client *osdc,
 				    struct ceph_osd_request *req)
 {
-	dout("__register_linger_request %p\n", req);
+	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
+	WARN_ON(!req->r_linger);
+
 	ceph_osdc_get_request(req);
 	list_add_tail(&req->r_linger_item, &osdc->req_linger);
 	if (req->r_osd)
-		list_add_tail(&req->r_linger_osd,
+		list_add_tail(&req->r_linger_osd_item,
 			      &req->r_osd->o_linger_requests);
 }
 
 static void __unregister_linger_request(struct ceph_osd_client *osdc,
 					struct ceph_osd_request *req)
 {
-	dout("__unregister_linger_request %p\n", req);
-	list_del_init(&req->r_linger_item);
-	if (req->r_osd) {
-		list_del_init(&req->r_linger_osd);
+	WARN_ON(!req->r_linger);
 
-		if (list_empty(&req->r_osd->o_requests) &&
-		    list_empty(&req->r_osd->o_linger_requests)) {
-			dout("moving osd to %p lru\n", req->r_osd);
-			__move_osd_to_lru(osdc, req->r_osd);
-		}
+	if (list_empty(&req->r_linger_item)) {
+		dout("%s %p tid %llu not registered\n", __func__, req,
+		     req->r_tid);
+		return;
+	}
+
+	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
+	list_del_init(&req->r_linger_item);
+
+	if (req->r_osd) {
+		list_del_init(&req->r_linger_osd_item);
+		maybe_move_osd_to_lru(osdc, req->r_osd);
 		if (list_empty(&req->r_osd_item))
 			req->r_osd = NULL;
 	}
 	ceph_osdc_put_request(req);
 }
 
-void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
-					 struct ceph_osd_request *req)
-{
-	mutex_lock(&osdc->request_mutex);
-	if (req->r_linger) {
-		req->r_linger = 0;
-		__unregister_linger_request(osdc, req);
-	}
-	mutex_unlock(&osdc->request_mutex);
-}
-EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
-
 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
 				  struct ceph_osd_request *req)
 {
@@ -2430,6 +2458,25 @@
 EXPORT_SYMBOL(ceph_osdc_start_request);
 
 /*
+ * Unregister a registered request.  The request is not completed (i.e.
+ * no callbacks or wakeups) - higher layers are supposed to know what
+ * they are canceling.
+ */
+void ceph_osdc_cancel_request(struct ceph_osd_request *req)
+{
+	struct ceph_osd_client *osdc = req->r_osdc;
+
+	mutex_lock(&osdc->request_mutex);
+	if (req->r_linger)
+		__unregister_linger_request(osdc, req);
+	__unregister_request(osdc, req);
+	mutex_unlock(&osdc->request_mutex);
+
+	dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
+}
+EXPORT_SYMBOL(ceph_osdc_cancel_request);
+
+/*
  * wait for a request to complete
  */
 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
@@ -2437,18 +2484,18 @@
 {
 	int rc;
 
+	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
+
 	rc = wait_for_completion_interruptible(&req->r_completion);
 	if (rc < 0) {
-		mutex_lock(&osdc->request_mutex);
-		__cancel_request(req);
-		__unregister_request(osdc, req);
-		mutex_unlock(&osdc->request_mutex);
+		dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
+		ceph_osdc_cancel_request(req);
 		complete_request(req);
-		dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
 		return rc;
 	}
 
-	dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
+	dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
+	     req->r_result);
 	return req->r_result;
 }
 EXPORT_SYMBOL(ceph_osdc_wait_request);
diff --git a/net/core/dev.c b/net/core/dev.c
index 1c15b18..b65a505 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3602,7 +3602,7 @@
 
 	if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
 	    skb->protocol == cpu_to_be16(ETH_P_8021AD)) {
-		skb = vlan_untag(skb);
+		skb = skb_vlan_untag(skb);
 		if (unlikely(!skb))
 			goto unlock;
 	}
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 8d39071..f0493e3 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -804,7 +804,8 @@
 			(nla_total_size(sizeof(struct ifla_vf_mac)) +
 			 nla_total_size(sizeof(struct ifla_vf_vlan)) +
 			 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
-			 nla_total_size(sizeof(struct ifla_vf_rate)));
+			 nla_total_size(sizeof(struct ifla_vf_rate)) +
+			 nla_total_size(sizeof(struct ifla_vf_link_state)));
 		return size;
 	} else
 		return 0;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 224506a6..163b673 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -62,6 +62,7 @@
 #include <linux/scatterlist.h>
 #include <linux/errqueue.h>
 #include <linux/prefetch.h>
+#include <linux/if_vlan.h>
 
 #include <net/protocol.h>
 #include <net/dst.h>
@@ -3973,3 +3974,55 @@
 	return shinfo->gso_size;
 }
 EXPORT_SYMBOL_GPL(skb_gso_transport_seglen);
+
+static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb)
+{
+	if (skb_cow(skb, skb_headroom(skb)) < 0) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN);
+	skb->mac_header += VLAN_HLEN;
+	return skb;
+}
+
+struct sk_buff *skb_vlan_untag(struct sk_buff *skb)
+{
+	struct vlan_hdr *vhdr;
+	u16 vlan_tci;
+
+	if (unlikely(vlan_tx_tag_present(skb))) {
+		/* vlan_tci is already set-up so leave this for another time */
+		return skb;
+	}
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (unlikely(!skb))
+		goto err_free;
+
+	if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
+		goto err_free;
+
+	vhdr = (struct vlan_hdr *)skb->data;
+	vlan_tci = ntohs(vhdr->h_vlan_TCI);
+	__vlan_hwaccel_put_tag(skb, skb->protocol, vlan_tci);
+
+	skb_pull_rcsum(skb, VLAN_HLEN);
+	vlan_set_encap_proto(skb, vhdr);
+
+	skb = skb_reorder_vlan_header(skb);
+	if (unlikely(!skb))
+		goto err_free;
+
+	skb_reset_network_header(skb);
+	skb_reset_transport_header(skb);
+	skb_reset_mac_len(skb);
+
+	return skb;
+
+err_free:
+	kfree_skb(skb);
+	return NULL;
+}
+EXPORT_SYMBOL(skb_vlan_untag);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 1901998..eaa4b00 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1798,8 +1798,6 @@
 no_route:
 	RT_CACHE_STAT_INC(in_no_route);
 	res.type = RTN_UNREACHABLE;
-	if (err == -ESRCH)
-		err = -ENETUNREACH;
 	goto local_input;
 
 	/*
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 181b70e..541f26a 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1188,13 +1188,6 @@
 					goto wait_for_memory;
 
 				/*
-				 * All packets are restored as if they have
-				 * already been sent.
-				 */
-				if (tp->repair)
-					TCP_SKB_CB(skb)->when = tcp_time_stamp;
-
-				/*
 				 * Check whether we can use HW checksum.
 				 */
 				if (sk->sk_route_caps & NETIF_F_ALL_CSUM)
@@ -1203,6 +1196,13 @@
 				skb_entail(sk, skb);
 				copy = size_goal;
 				max = size_goal;
+
+				/* All packets are restored as if they have
+				 * already been sent. skb_mstamp isn't set to
+				 * avoid wrong rtt estimation.
+				 */
+				if (tp->repair)
+					TCP_SKB_CB(skb)->sacked |= TCPCB_REPAIRED;
 			}
 
 			/* Try to append data to the end of skb. */
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index a3d47af..a906e02 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2687,7 +2687,6 @@
  */
 static void tcp_process_loss(struct sock *sk, int flag, bool is_dupack)
 {
-	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
 	bool recovered = !before(tp->snd_una, tp->high_seq);
 
@@ -2713,12 +2712,9 @@
 
 	if (recovered) {
 		/* F-RTO RFC5682 sec 3.1 step 2.a and 1st part of step 3.a */
-		icsk->icsk_retransmits = 0;
 		tcp_try_undo_recovery(sk);
 		return;
 	}
-	if (flag & FLAG_DATA_ACKED)
-		icsk->icsk_retransmits = 0;
 	if (tcp_is_reno(tp)) {
 		/* A Reno DUPACK means new data in F-RTO step 2.b above are
 		 * delivered. Lower inflight to clock out (re)tranmissions.
@@ -3050,10 +3046,15 @@
 	first_ackt.v64 = 0;
 
 	while ((skb = tcp_write_queue_head(sk)) && skb != tcp_send_head(sk)) {
+		struct skb_shared_info *shinfo = skb_shinfo(skb);
 		struct tcp_skb_cb *scb = TCP_SKB_CB(skb);
 		u8 sacked = scb->sacked;
 		u32 acked_pcount;
 
+		if (unlikely(shinfo->tx_flags & SKBTX_ACK_TSTAMP) &&
+		    between(shinfo->tskey, prior_snd_una, tp->snd_una - 1))
+			__skb_tstamp_tx(skb, NULL, sk, SCM_TSTAMP_ACK);
+
 		/* Determine how many packets and what bytes were acked, tso and else */
 		if (after(scb->end_seq, tp->snd_una)) {
 			if (tcp_skb_pcount(skb) == 1 ||
@@ -3107,11 +3108,6 @@
 			tp->retrans_stamp = 0;
 		}
 
-		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_ACK_TSTAMP) &&
-		    between(skb_shinfo(skb)->tskey, prior_snd_una,
-			    tp->snd_una + 1))
-			__skb_tstamp_tx(skb, NULL, sk, SCM_TSTAMP_ACK);
-
 		if (!fully_acked)
 			break;
 
@@ -3405,8 +3401,10 @@
 	    icsk->icsk_pending == ICSK_TIME_LOSS_PROBE)
 		tcp_rearm_rto(sk);
 
-	if (after(ack, prior_snd_una))
+	if (after(ack, prior_snd_una)) {
 		flag |= FLAG_SND_UNA_ADVANCED;
+		icsk->icsk_retransmits = 0;
+	}
 
 	prior_fackets = tp->fackets_out;
 
@@ -5979,12 +5977,14 @@
 		 * timewait bucket, so that all the necessary checks
 		 * are made in the function processing timewait state.
 		 */
-		if (tmp_opt.saw_tstamp && tcp_death_row.sysctl_tw_recycle) {
+		if (tcp_death_row.sysctl_tw_recycle) {
 			bool strict;
 
 			dst = af_ops->route_req(sk, &fl, req, &strict);
+
 			if (dst && strict &&
-			    !tcp_peer_is_proven(req, dst, true)) {
+			    !tcp_peer_is_proven(req, dst, true,
+						tmp_opt.saw_tstamp)) {
 				NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
 				goto drop_and_release;
 			}
@@ -5993,7 +5993,8 @@
 		else if (!sysctl_tcp_syncookies &&
 			 (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
 			  (sysctl_max_syn_backlog >> 2)) &&
-			 !tcp_peer_is_proven(req, dst, false)) {
+			 !tcp_peer_is_proven(req, dst, false,
+					     tmp_opt.saw_tstamp)) {
 			/* Without syncookies last quarter of
 			 * backlog is filled with destinations,
 			 * proven to be alive.
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index dceff5f..cd17f00 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -271,7 +271,7 @@
  * It can be called through tcp_release_cb() if socket was owned by user
  * at the time tcp_v4_err() was called to handle ICMP message.
  */
-static void tcp_v4_mtu_reduced(struct sock *sk)
+void tcp_v4_mtu_reduced(struct sock *sk)
 {
 	struct dst_entry *dst;
 	struct inet_sock *inet = inet_sk(sk);
@@ -302,6 +302,7 @@
 		tcp_simple_retransmit(sk);
 	} /* else let the usual retransmit timer handle it */
 }
+EXPORT_SYMBOL(tcp_v4_mtu_reduced);
 
 static void do_redirect(struct sk_buff *skb, struct sock *sk)
 {
@@ -1787,6 +1788,7 @@
 	.compat_setsockopt = compat_ip_setsockopt,
 	.compat_getsockopt = compat_ip_getsockopt,
 #endif
+	.mtu_reduced	   = tcp_v4_mtu_reduced,
 };
 EXPORT_SYMBOL(ipv4_specific);
 
@@ -2406,7 +2408,6 @@
 	.sendpage		= tcp_sendpage,
 	.backlog_rcv		= tcp_v4_do_rcv,
 	.release_cb		= tcp_release_cb,
-	.mtu_reduced		= tcp_v4_mtu_reduced,
 	.hash			= inet_hash,
 	.unhash			= inet_unhash,
 	.get_port		= inet_csk_get_port,
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 0d54e59..ed9c9a9 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -576,7 +576,8 @@
 	tp->snd_cwnd_stamp = tcp_time_stamp;
 }
 
-bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst, bool paws_check)
+bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
+			bool paws_check, bool timestamps)
 {
 	struct tcp_metrics_block *tm;
 	bool ret;
@@ -589,7 +590,8 @@
 	if (paws_check) {
 		if (tm &&
 		    (u32)get_seconds() - tm->tcpm_ts_stamp < TCP_PAWS_MSL &&
-		    (s32)(tm->tcpm_ts - req->ts_recent) > TCP_PAWS_WINDOW)
+		    ((s32)(tm->tcpm_ts - req->ts_recent) > TCP_PAWS_WINDOW ||
+		     !timestamps))
 			ret = false;
 		else
 			ret = true;
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 8fcfc91..5a7c41f 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -800,7 +800,7 @@
 		__sock_put(sk);
 	}
 	if (flags & (1UL << TCP_MTU_REDUCED_DEFERRED)) {
-		sk->sk_prot->mtu_reduced(sk);
+		inet_csk(sk)->icsk_af_ops->mtu_reduced(sk);
 		__sock_put(sk);
 	}
 }
@@ -1069,6 +1069,21 @@
 	tcp_verify_left_out(tp);
 }
 
+static void tcp_fragment_tstamp(struct sk_buff *skb, struct sk_buff *skb2)
+{
+	struct skb_shared_info *shinfo = skb_shinfo(skb);
+
+	if (unlikely(shinfo->tx_flags & SKBTX_ANY_TSTAMP) &&
+	    !before(shinfo->tskey, TCP_SKB_CB(skb2)->seq)) {
+		struct skb_shared_info *shinfo2 = skb_shinfo(skb2);
+		u8 tsflags = shinfo->tx_flags & SKBTX_ANY_TSTAMP;
+
+		shinfo->tx_flags &= ~tsflags;
+		shinfo2->tx_flags |= tsflags;
+		swap(shinfo->tskey, shinfo2->tskey);
+	}
+}
+
 /* Function to create two new TCP segments.  Shrinks the given segment
  * to the specified size and appends a new segment with the rest of the
  * packet to the list.  This won't be called frequently, I hope.
@@ -1136,6 +1151,7 @@
 	 */
 	TCP_SKB_CB(buff)->when = TCP_SKB_CB(skb)->when;
 	buff->tstamp = skb->tstamp;
+	tcp_fragment_tstamp(skb, buff);
 
 	old_factor = tcp_skb_pcount(skb);
 
@@ -1652,6 +1668,7 @@
 
 	buff->ip_summed = skb->ip_summed = CHECKSUM_PARTIAL;
 	skb_split(skb, buff, len);
+	tcp_fragment_tstamp(skb, buff);
 
 	/* Fix up tso_factor for both original and new SKB.  */
 	tcp_set_skb_tso_segs(sk, skb, mss_now);
@@ -1917,8 +1934,11 @@
 		tso_segs = tcp_init_tso_segs(sk, skb, mss_now);
 		BUG_ON(!tso_segs);
 
-		if (unlikely(tp->repair) && tp->repair_queue == TCP_SEND_QUEUE)
+		if (unlikely(tp->repair) && tp->repair_queue == TCP_SEND_QUEUE) {
+			/* "when" is used as a start point for the retransmit timer */
+			TCP_SKB_CB(skb)->when = tcp_time_stamp;
 			goto repair; /* Skip network transmission */
+		}
 
 		cwnd_quota = tcp_cwnd_test(tp, skb);
 		if (!cwnd_quota) {
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 2e9ba03..6163f85 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -101,19 +101,19 @@
 	for_each_ip_tunnel_rcu(t, sitn->tunnels_r_l[h0 ^ h1]) {
 		if (local == t->parms.iph.saddr &&
 		    remote == t->parms.iph.daddr &&
-		    (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
+		    (!dev || !t->parms.link || dev->ifindex == t->parms.link) &&
 		    (t->dev->flags & IFF_UP))
 			return t;
 	}
 	for_each_ip_tunnel_rcu(t, sitn->tunnels_r[h0]) {
 		if (remote == t->parms.iph.daddr &&
-		    (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
+		    (!dev || !t->parms.link || dev->ifindex == t->parms.link) &&
 		    (t->dev->flags & IFF_UP))
 			return t;
 	}
 	for_each_ip_tunnel_rcu(t, sitn->tunnels_l[h1]) {
 		if (local == t->parms.iph.saddr &&
-		    (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
+		    (!dev || !t->parms.link || dev->ifindex == t->parms.link) &&
 		    (t->dev->flags & IFF_UP))
 			return t;
 	}
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index f2ce955..29964c3 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1595,6 +1595,7 @@
 	.compat_setsockopt = compat_ipv6_setsockopt,
 	.compat_getsockopt = compat_ipv6_getsockopt,
 #endif
+	.mtu_reduced	   = tcp_v6_mtu_reduced,
 };
 
 #ifdef CONFIG_TCP_MD5SIG
@@ -1625,6 +1626,7 @@
 	.compat_setsockopt = compat_ipv6_setsockopt,
 	.compat_getsockopt = compat_ipv6_getsockopt,
 #endif
+	.mtu_reduced	   = tcp_v4_mtu_reduced,
 };
 
 #ifdef CONFIG_TCP_MD5SIG
@@ -1864,7 +1866,6 @@
 	.sendpage		= tcp_sendpage,
 	.backlog_rcv		= tcp_v6_do_rcv,
 	.release_cb		= tcp_release_cb,
-	.mtu_reduced		= tcp_v6_mtu_reduced,
 	.hash			= tcp_v6_hash,
 	.unhash			= inet_unhash,
 	.get_port		= inet_csk_get_port,
diff --git a/net/irda/irlap_frame.c b/net/irda/irlap_frame.c
index 9ea0c93..a37998c 100644
--- a/net/irda/irlap_frame.c
+++ b/net/irda/irlap_frame.c
@@ -622,7 +622,7 @@
 	frame = (struct rd_frame *)skb_put(tx_skb, 2);
 
 	frame->caddr = self->caddr;
-	frame->caddr = RD_RSP | PF_BIT;
+	frame->control = RD_RSP | PF_BIT;
 
 	irlap_queue_xmit(self, tx_skb);
 }
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 1fbab0c..a93c97f 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -35,11 +35,7 @@
 
 int nf_register_afinfo(const struct nf_afinfo *afinfo)
 {
-	int err;
-
-	err = mutex_lock_interruptible(&afinfo_mutex);
-	if (err < 0)
-		return err;
+	mutex_lock(&afinfo_mutex);
 	RCU_INIT_POINTER(nf_afinfo[afinfo->family], afinfo);
 	mutex_unlock(&afinfo_mutex);
 	return 0;
@@ -68,11 +64,8 @@
 int nf_register_hook(struct nf_hook_ops *reg)
 {
 	struct nf_hook_ops *elem;
-	int err;
 
-	err = mutex_lock_interruptible(&nf_hook_mutex);
-	if (err < 0)
-		return err;
+	mutex_lock(&nf_hook_mutex);
 	list_for_each_entry(elem, &nf_hooks[reg->pf][reg->hooknum], list) {
 		if (reg->priority < elem->priority)
 			break;
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 8416307..fd3f444 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2271,10 +2271,7 @@
 	    cmd == IP_VS_SO_SET_STOPDAEMON) {
 		struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
 
-		if (mutex_lock_interruptible(&ipvs->sync_mutex)) {
-			ret = -ERESTARTSYS;
-			goto out_dec;
-		}
+		mutex_lock(&ipvs->sync_mutex);
 		if (cmd == IP_VS_SO_SET_STARTDAEMON)
 			ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
 						dm->syncid);
@@ -2284,11 +2281,7 @@
 		goto out_dec;
 	}
 
-	if (mutex_lock_interruptible(&__ip_vs_mutex)) {
-		ret = -ERESTARTSYS;
-		goto out_dec;
-	}
-
+	mutex_lock(&__ip_vs_mutex);
 	if (cmd == IP_VS_SO_SET_FLUSH) {
 		/* Flush the virtual service */
 		ret = ip_vs_flush(net, false);
@@ -2573,9 +2566,7 @@
 		struct ip_vs_daemon_user d[2];
 
 		memset(&d, 0, sizeof(d));
-		if (mutex_lock_interruptible(&ipvs->sync_mutex))
-			return -ERESTARTSYS;
-
+		mutex_lock(&ipvs->sync_mutex);
 		if (ipvs->sync_state & IP_VS_STATE_MASTER) {
 			d[0].state = IP_VS_STATE_MASTER;
 			strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
@@ -2594,9 +2585,7 @@
 		return ret;
 	}
 
-	if (mutex_lock_interruptible(&__ip_vs_mutex))
-		return -ERESTARTSYS;
-
+	mutex_lock(&__ip_vs_mutex);
 	switch (cmd) {
 	case IP_VS_SO_GET_VERSION:
 	{
diff --git a/net/netfilter/nf_sockopt.c b/net/netfilter/nf_sockopt.c
index f042ae5..c68c1e5 100644
--- a/net/netfilter/nf_sockopt.c
+++ b/net/netfilter/nf_sockopt.c
@@ -26,9 +26,7 @@
 	struct nf_sockopt_ops *ops;
 	int ret = 0;
 
-	if (mutex_lock_interruptible(&nf_sockopt_mutex) != 0)
-		return -EINTR;
-
+	mutex_lock(&nf_sockopt_mutex);
 	list_for_each_entry(ops, &nf_sockopts, list) {
 		if (ops->pf == reg->pf
 		    && (overlap(ops->set_optmin, ops->set_optmax,
@@ -65,9 +63,7 @@
 {
 	struct nf_sockopt_ops *ops;
 
-	if (mutex_lock_interruptible(&nf_sockopt_mutex) != 0)
-		return ERR_PTR(-EINTR);
-
+	mutex_lock(&nf_sockopt_mutex);
 	list_for_each_entry(ops, &nf_sockopts, list) {
 		if (ops->pf == pf) {
 			if (!try_module_get(ops->owner))
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index b8035c2..deeb95f 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -899,6 +899,9 @@
 static void nft_chain_stats_replace(struct nft_base_chain *chain,
 				    struct nft_stats __percpu *newstats)
 {
+	if (newstats == NULL)
+		return;
+
 	if (chain->stats) {
 		struct nft_stats __percpu *oldstats =
 				nft_dereference(chain->stats);
@@ -3134,16 +3137,13 @@
 		goto err2;
 
 	trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
-	if (trans == NULL)
+	if (trans == NULL) {
+		err = -ENOMEM;
 		goto err2;
+	}
 
 	nft_trans_elem(trans) = elem;
 	list_add_tail(&trans->list, &ctx->net->nft.commit_list);
-
-	nft_data_uninit(&elem.key, NFT_DATA_VALUE);
-	if (set->flags & NFT_SET_MAP)
-		nft_data_uninit(&elem.data, set->dtype);
-
 	return 0;
 err2:
 	nft_data_uninit(&elem.key, desc.type);
@@ -3310,7 +3310,7 @@
 {
 	struct net *net = sock_net(skb->sk);
 	struct nft_trans *trans, *next;
-	struct nft_set *set;
+	struct nft_trans_elem *te;
 
 	/* Bump generation counter, invalidate any dump in progress */
 	while (++net->nft.base_seq == 0);
@@ -3396,13 +3396,17 @@
 			nft_trans_destroy(trans);
 			break;
 		case NFT_MSG_DELSETELEM:
-			nf_tables_setelem_notify(&trans->ctx,
-						 nft_trans_elem_set(trans),
-						 &nft_trans_elem(trans),
+			te = (struct nft_trans_elem *)trans->data;
+			nf_tables_setelem_notify(&trans->ctx, te->set,
+						 &te->elem,
 						 NFT_MSG_DELSETELEM, 0);
-			set = nft_trans_elem_set(trans);
-			set->ops->get(set, &nft_trans_elem(trans));
-			set->ops->remove(set, &nft_trans_elem(trans));
+			te->set->ops->get(te->set, &te->elem);
+			te->set->ops->remove(te->set, &te->elem);
+			nft_data_uninit(&te->elem.key, NFT_DATA_VALUE);
+			if (te->elem.flags & NFT_SET_MAP) {
+				nft_data_uninit(&te->elem.data,
+						te->set->dtype);
+			}
 			nft_trans_destroy(trans);
 			break;
 		}
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 47b978b..272ae4d 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -71,18 +71,14 @@
 static const unsigned int xt_jumpstack_multiplier = 2;
 
 /* Registration hooks for targets. */
-int
-xt_register_target(struct xt_target *target)
+int xt_register_target(struct xt_target *target)
 {
 	u_int8_t af = target->family;
-	int ret;
 
-	ret = mutex_lock_interruptible(&xt[af].mutex);
-	if (ret != 0)
-		return ret;
+	mutex_lock(&xt[af].mutex);
 	list_add(&target->list, &xt[af].target);
 	mutex_unlock(&xt[af].mutex);
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL(xt_register_target);
 
@@ -125,20 +121,14 @@
 }
 EXPORT_SYMBOL(xt_unregister_targets);
 
-int
-xt_register_match(struct xt_match *match)
+int xt_register_match(struct xt_match *match)
 {
 	u_int8_t af = match->family;
-	int ret;
 
-	ret = mutex_lock_interruptible(&xt[af].mutex);
-	if (ret != 0)
-		return ret;
-
+	mutex_lock(&xt[af].mutex);
 	list_add(&match->list, &xt[af].match);
 	mutex_unlock(&xt[af].mutex);
-
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL(xt_register_match);
 
@@ -194,9 +184,7 @@
 	struct xt_match *m;
 	int err = -ENOENT;
 
-	if (mutex_lock_interruptible(&xt[af].mutex) != 0)
-		return ERR_PTR(-EINTR);
-
+	mutex_lock(&xt[af].mutex);
 	list_for_each_entry(m, &xt[af].match, list) {
 		if (strcmp(m->name, name) == 0) {
 			if (m->revision == revision) {
@@ -239,9 +227,7 @@
 	struct xt_target *t;
 	int err = -ENOENT;
 
-	if (mutex_lock_interruptible(&xt[af].mutex) != 0)
-		return ERR_PTR(-EINTR);
-
+	mutex_lock(&xt[af].mutex);
 	list_for_each_entry(t, &xt[af].target, list) {
 		if (strcmp(t->name, name) == 0) {
 			if (t->revision == revision) {
@@ -323,10 +309,7 @@
 {
 	int have_rev, best = -1;
 
-	if (mutex_lock_interruptible(&xt[af].mutex) != 0) {
-		*err = -EINTR;
-		return 1;
-	}
+	mutex_lock(&xt[af].mutex);
 	if (target == 1)
 		have_rev = target_revfn(af, name, revision, &best);
 	else
@@ -732,9 +715,7 @@
 {
 	struct xt_table *t;
 
-	if (mutex_lock_interruptible(&xt[af].mutex) != 0)
-		return ERR_PTR(-EINTR);
-
+	mutex_lock(&xt[af].mutex);
 	list_for_each_entry(t, &net->xt.tables[af], list)
 		if (strcmp(t->name, name) == 0 && try_module_get(t->me))
 			return t;
@@ -883,10 +864,7 @@
 		goto out;
 	}
 
-	ret = mutex_lock_interruptible(&xt[table->af].mutex);
-	if (ret != 0)
-		goto out_free;
-
+	mutex_lock(&xt[table->af].mutex);
 	/* Don't autoload: we'd eat our tail... */
 	list_for_each_entry(t, &net->xt.tables[table->af], list) {
 		if (strcmp(t->name, table->name) == 0) {
@@ -911,9 +889,8 @@
 	mutex_unlock(&xt[table->af].mutex);
 	return table;
 
- unlock:
+unlock:
 	mutex_unlock(&xt[table->af].mutex);
-out_free:
 	kfree(table);
 out:
 	return ERR_PTR(ret);
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index a324b4b..c416725 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -213,7 +213,7 @@
 		nskb->protocol = htons((u16) sk->sk_protocol);
 		nskb->pkt_type = netlink_is_kernel(sk) ?
 				 PACKET_KERNEL : PACKET_USER;
-
+		skb_reset_network_header(nskb);
 		ret = dev_queue_xmit(nskb);
 		if (unlikely(ret > 0))
 			ret = net_xmit_errno(ret);
@@ -2921,6 +2921,7 @@
 }
 
 static void *netlink_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(RCU)
 {
 	rcu_read_lock();
 	return *pos ? netlink_seq_socket_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -2970,6 +2971,7 @@
 }
 
 static void netlink_seq_stop(struct seq_file *seq, void *v)
+	__releases(RCU)
 {
 	rcu_read_unlock();
 }
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 7ad3f02..7228ec3 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -47,8 +47,6 @@
 #include <linux/openvswitch.h>
 #include <linux/rculist.h>
 #include <linux/dmi.h>
-#include <linux/genetlink.h>
-#include <net/genetlink.h>
 #include <net/genetlink.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 702fb21..6d8f2ec 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -137,8 +137,10 @@
 	vport->ops = ops;
 	INIT_HLIST_NODE(&vport->dp_hash_node);
 
-	if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids))
+	if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) {
+		kfree(vport);
 		return ERR_PTR(-EINVAL);
+	}
 
 	vport->percpu_stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
 	if (!vport->percpu_stats) {
diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c
index a622ad6..2e0a6f9 100644
--- a/net/sunrpc/addr.c
+++ b/net/sunrpc/addr.c
@@ -176,7 +176,7 @@
 	len = (buf + buflen) - delim - 1;
 	p = kstrndup(delim + 1, len, GFP_KERNEL);
 	if (p) {
-		unsigned long scope_id = 0;
+		u32 scope_id = 0;
 		struct net_device *dev;
 
 		dev = dev_get_by_name(net, p);
@@ -184,7 +184,7 @@
 			scope_id = dev->ifindex;
 			dev_put(dev);
 		} else {
-			if (strict_strtoul(p, 10, &scope_id) == 0) {
+			if (kstrtou32(p, 10, &scope_id) == 0) {
 				kfree(p);
 				return 0;
 			}
@@ -304,7 +304,7 @@
  * @sap: buffer into which to plant socket address
  * @salen: size of buffer
  *
- * @uaddr does not have to be '\0'-terminated, but strict_strtoul() and
+ * @uaddr does not have to be '\0'-terminated, but kstrtou8() and
  * rpc_pton() require proper string termination to be successful.
  *
  * Returns the size of the socket address if successful; otherwise
@@ -315,7 +315,7 @@
 			  const size_t salen)
 {
 	char *c, buf[RPCBIND_MAXUADDRLEN + sizeof('\0')];
-	unsigned long portlo, porthi;
+	u8 portlo, porthi;
 	unsigned short port;
 
 	if (uaddr_len > RPCBIND_MAXUADDRLEN)
@@ -327,18 +327,14 @@
 	c = strrchr(buf, '.');
 	if (unlikely(c == NULL))
 		return 0;
-	if (unlikely(strict_strtoul(c + 1, 10, &portlo) != 0))
-		return 0;
-	if (unlikely(portlo > 255))
+	if (unlikely(kstrtou8(c + 1, 10, &portlo) != 0))
 		return 0;
 
 	*c = '\0';
 	c = strrchr(buf, '.');
 	if (unlikely(c == NULL))
 		return 0;
-	if (unlikely(strict_strtoul(c + 1, 10, &porthi) != 0))
-		return 0;
-	if (unlikely(porthi > 255))
+	if (unlikely(kstrtou8(c + 1, 10, &porthi) != 0))
 		return 0;
 
 	port = (unsigned short)((porthi << 8) | portlo);
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index f773667..383eb91 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -48,7 +48,7 @@
 
 	if (!val)
 		goto out_inval;
-	ret = strict_strtoul(val, 0, &num);
+	ret = kstrtoul(val, 0, &num);
 	if (ret == -EINVAL)
 		goto out_inval;
 	nbits = fls(num);
@@ -80,6 +80,10 @@
 module_param_named(auth_hashtable_size, auth_hashbits, hashtbl_sz, 0644);
 MODULE_PARM_DESC(auth_hashtable_size, "RPC credential cache hashtable size");
 
+static unsigned long auth_max_cred_cachesize = ULONG_MAX;
+module_param(auth_max_cred_cachesize, ulong, 0644);
+MODULE_PARM_DESC(auth_max_cred_cachesize, "RPC credential maximum total cache size");
+
 static u32
 pseudoflavor_to_flavor(u32 flavor) {
 	if (flavor > RPC_AUTH_MAXFLAVOR)
@@ -363,6 +367,15 @@
 }
 EXPORT_SYMBOL_GPL(rpcauth_cred_key_to_expire);
 
+char *
+rpcauth_stringify_acceptor(struct rpc_cred *cred)
+{
+	if (!cred->cr_ops->crstringify_acceptor)
+		return NULL;
+	return cred->cr_ops->crstringify_acceptor(cred);
+}
+EXPORT_SYMBOL_GPL(rpcauth_stringify_acceptor);
+
 /*
  * Destroy a list of credentials
  */
@@ -472,6 +485,20 @@
 	return freed;
 }
 
+static unsigned long
+rpcauth_cache_do_shrink(int nr_to_scan)
+{
+	LIST_HEAD(free);
+	unsigned long freed;
+
+	spin_lock(&rpc_credcache_lock);
+	freed = rpcauth_prune_expired(&free, nr_to_scan);
+	spin_unlock(&rpc_credcache_lock);
+	rpcauth_destroy_credlist(&free);
+
+	return freed;
+}
+
 /*
  * Run memory cache shrinker.
  */
@@ -479,9 +506,6 @@
 rpcauth_cache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 
 {
-	LIST_HEAD(free);
-	unsigned long freed;
-
 	if ((sc->gfp_mask & GFP_KERNEL) != GFP_KERNEL)
 		return SHRINK_STOP;
 
@@ -489,12 +513,7 @@
 	if (list_empty(&cred_unused))
 		return SHRINK_STOP;
 
-	spin_lock(&rpc_credcache_lock);
-	freed = rpcauth_prune_expired(&free, sc->nr_to_scan);
-	spin_unlock(&rpc_credcache_lock);
-	rpcauth_destroy_credlist(&free);
-
-	return freed;
+	return rpcauth_cache_do_shrink(sc->nr_to_scan);
 }
 
 static unsigned long
@@ -504,6 +523,21 @@
 	return (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
 }
 
+static void
+rpcauth_cache_enforce_limit(void)
+{
+	unsigned long diff;
+	unsigned int nr_to_scan;
+
+	if (number_cred_unused <= auth_max_cred_cachesize)
+		return;
+	diff = number_cred_unused - auth_max_cred_cachesize;
+	nr_to_scan = 100;
+	if (diff < nr_to_scan)
+		nr_to_scan = diff;
+	rpcauth_cache_do_shrink(nr_to_scan);
+}
+
 /*
  * Look up a process' credentials in the authentication cache
  */
@@ -523,6 +557,12 @@
 	hlist_for_each_entry_rcu(entry, &cache->hashtable[nr], cr_hash) {
 		if (!entry->cr_ops->crmatch(acred, entry, flags))
 			continue;
+		if (flags & RPCAUTH_LOOKUP_RCU) {
+			if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) &&
+			    !test_bit(RPCAUTH_CRED_NEW, &entry->cr_flags))
+				cred = entry;
+			break;
+		}
 		spin_lock(&cache->lock);
 		if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) {
 			spin_unlock(&cache->lock);
@@ -537,6 +577,9 @@
 	if (cred != NULL)
 		goto found;
 
+	if (flags & RPCAUTH_LOOKUP_RCU)
+		return ERR_PTR(-ECHILD);
+
 	new = auth->au_ops->crcreate(auth, acred, flags);
 	if (IS_ERR(new)) {
 		cred = new;
@@ -557,6 +600,7 @@
 	} else
 		list_add_tail(&new->cr_lru, &free);
 	spin_unlock(&cache->lock);
+	rpcauth_cache_enforce_limit();
 found:
 	if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
 	    cred->cr_ops->cr_init != NULL &&
@@ -586,10 +630,8 @@
 	memset(&acred, 0, sizeof(acred));
 	acred.uid = cred->fsuid;
 	acred.gid = cred->fsgid;
-	acred.group_info = get_group_info(((struct cred *)cred)->group_info);
-
+	acred.group_info = cred->group_info;
 	ret = auth->au_ops->lookup_cred(auth, &acred, flags);
-	put_group_info(acred.group_info);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(rpcauth_lookupcred);
diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c
index ed04869..6f6b829 100644
--- a/net/sunrpc/auth_generic.c
+++ b/net/sunrpc/auth_generic.c
@@ -38,6 +38,12 @@
 }
 EXPORT_SYMBOL_GPL(rpc_lookup_cred);
 
+struct rpc_cred *rpc_lookup_cred_nonblock(void)
+{
+	return rpcauth_lookupcred(&generic_auth, RPCAUTH_LOOKUP_RCU);
+}
+EXPORT_SYMBOL_GPL(rpc_lookup_cred_nonblock);
+
 /*
  * Public call interface for looking up machine creds.
  */
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index b6e440b..afb292c 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -183,8 +183,9 @@
 	struct gss_cl_ctx *ctx = NULL;
 
 	rcu_read_lock();
-	if (gss_cred->gc_ctx)
-		ctx = gss_get_ctx(gss_cred->gc_ctx);
+	ctx = rcu_dereference(gss_cred->gc_ctx);
+	if (ctx)
+		gss_get_ctx(ctx);
 	rcu_read_unlock();
 	return ctx;
 }
@@ -262,9 +263,22 @@
 		p = ERR_PTR(ret);
 		goto err;
 	}
-	dprintk("RPC:       %s Success. gc_expiry %lu now %lu timeout %u\n",
-		__func__, ctx->gc_expiry, now, timeout);
-	return q;
+
+	/* is there any trailing data? */
+	if (q == end) {
+		p = q;
+		goto done;
+	}
+
+	/* pull in acceptor name (if there is one) */
+	p = simple_get_netobj(q, end, &ctx->gc_acceptor);
+	if (IS_ERR(p))
+		goto err;
+done:
+	dprintk("RPC:       %s Success. gc_expiry %lu now %lu timeout %u acceptor %.*s\n",
+		__func__, ctx->gc_expiry, now, timeout, ctx->gc_acceptor.len,
+		ctx->gc_acceptor.data);
+	return p;
 err:
 	dprintk("RPC:       %s returns error %ld\n", __func__, -PTR_ERR(p));
 	return p;
@@ -1194,13 +1208,13 @@
 {
 	struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
 	struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
+	struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
 	struct rpc_task *task;
 
-	if (gss_cred->gc_ctx == NULL ||
-	    test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
+	if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0)
 		return 0;
 
-	gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY;
+	ctx->gc_proc = RPC_GSS_PROC_DESTROY;
 	cred->cr_ops = &gss_nullops;
 
 	/* Take a reference to ensure the cred will be destroyed either
@@ -1225,6 +1239,7 @@
 
 	gss_delete_sec_context(&ctx->gc_gss_ctx);
 	kfree(ctx->gc_wire_ctx.data);
+	kfree(ctx->gc_acceptor.data);
 	kfree(ctx);
 }
 
@@ -1260,7 +1275,7 @@
 {
 	struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
 	struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth);
-	struct gss_cl_ctx *ctx = gss_cred->gc_ctx;
+	struct gss_cl_ctx *ctx = rcu_dereference_protected(gss_cred->gc_ctx, 1);
 
 	RCU_INIT_POINTER(gss_cred->gc_ctx, NULL);
 	call_rcu(&cred->cr_rcu, gss_free_cred_callback);
@@ -1332,6 +1347,36 @@
 	return err;
 }
 
+static char *
+gss_stringify_acceptor(struct rpc_cred *cred)
+{
+	char *string = NULL;
+	struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base);
+	struct gss_cl_ctx *ctx;
+	struct xdr_netobj *acceptor;
+
+	rcu_read_lock();
+	ctx = rcu_dereference(gss_cred->gc_ctx);
+	if (!ctx)
+		goto out;
+
+	acceptor = &ctx->gc_acceptor;
+
+	/* no point if there's no string */
+	if (!acceptor->len)
+		goto out;
+
+	string = kmalloc(acceptor->len + 1, GFP_KERNEL);
+	if (!string)
+		goto out;
+
+	memcpy(string, acceptor->data, acceptor->len);
+	string[acceptor->len] = '\0';
+out:
+	rcu_read_unlock();
+	return string;
+}
+
 /*
  * Returns -EACCES if GSS context is NULL or will expire within the
  * timeout (miliseconds)
@@ -1340,15 +1385,16 @@
 gss_key_timeout(struct rpc_cred *rc)
 {
 	struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+	struct gss_cl_ctx *ctx;
 	unsigned long now = jiffies;
 	unsigned long expire;
 
-	if (gss_cred->gc_ctx == NULL)
-		return -EACCES;
-
-	expire = gss_cred->gc_ctx->gc_expiry - (gss_key_expire_timeo * HZ);
-
-	if (time_after(now, expire))
+	rcu_read_lock();
+	ctx = rcu_dereference(gss_cred->gc_ctx);
+	if (ctx)
+		expire = ctx->gc_expiry - (gss_key_expire_timeo * HZ);
+	rcu_read_unlock();
+	if (!ctx || time_after(now, expire))
 		return -EACCES;
 	return 0;
 }
@@ -1357,13 +1403,19 @@
 gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags)
 {
 	struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base);
+	struct gss_cl_ctx *ctx;
 	int ret;
 
 	if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags))
 		goto out;
 	/* Don't match with creds that have expired. */
-	if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry))
+	rcu_read_lock();
+	ctx = rcu_dereference(gss_cred->gc_ctx);
+	if (!ctx || time_after(jiffies, ctx->gc_expiry)) {
+		rcu_read_unlock();
 		return 0;
+	}
+	rcu_read_unlock();
 	if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags))
 		return 0;
 out:
@@ -1909,29 +1961,31 @@
 };
 
 static const struct rpc_credops gss_credops = {
-	.cr_name	= "AUTH_GSS",
-	.crdestroy	= gss_destroy_cred,
-	.cr_init	= gss_cred_init,
-	.crbind		= rpcauth_generic_bind_cred,
-	.crmatch	= gss_match,
-	.crmarshal	= gss_marshal,
-	.crrefresh	= gss_refresh,
-	.crvalidate	= gss_validate,
-	.crwrap_req	= gss_wrap_req,
-	.crunwrap_resp	= gss_unwrap_resp,
-	.crkey_timeout	= gss_key_timeout,
+	.cr_name		= "AUTH_GSS",
+	.crdestroy		= gss_destroy_cred,
+	.cr_init		= gss_cred_init,
+	.crbind			= rpcauth_generic_bind_cred,
+	.crmatch		= gss_match,
+	.crmarshal		= gss_marshal,
+	.crrefresh		= gss_refresh,
+	.crvalidate		= gss_validate,
+	.crwrap_req		= gss_wrap_req,
+	.crunwrap_resp		= gss_unwrap_resp,
+	.crkey_timeout		= gss_key_timeout,
+	.crstringify_acceptor	= gss_stringify_acceptor,
 };
 
 static const struct rpc_credops gss_nullops = {
-	.cr_name	= "AUTH_GSS",
-	.crdestroy	= gss_destroy_nullcred,
-	.crbind		= rpcauth_generic_bind_cred,
-	.crmatch	= gss_match,
-	.crmarshal	= gss_marshal,
-	.crrefresh	= gss_refresh_null,
-	.crvalidate	= gss_validate,
-	.crwrap_req	= gss_wrap_req,
-	.crunwrap_resp	= gss_unwrap_resp,
+	.cr_name		= "AUTH_GSS",
+	.crdestroy		= gss_destroy_nullcred,
+	.crbind			= rpcauth_generic_bind_cred,
+	.crmatch		= gss_match,
+	.crmarshal		= gss_marshal,
+	.crrefresh		= gss_refresh_null,
+	.crvalidate		= gss_validate,
+	.crwrap_req		= gss_wrap_req,
+	.crunwrap_resp		= gss_unwrap_resp,
+	.crstringify_acceptor	= gss_stringify_acceptor,
 };
 
 static const struct rpc_pipe_ops gss_upcall_ops_v0 = {
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index 0f43e89..f5ed9f6 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -641,7 +641,7 @@
 
 u32
 gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
-		     struct xdr_buf *buf, int ec, struct page **pages)
+		     struct xdr_buf *buf, struct page **pages)
 {
 	u32 err;
 	struct xdr_netobj hmac;
@@ -684,13 +684,8 @@
 		ecptr = buf->tail[0].iov_base;
 	}
 
-	memset(ecptr, 'X', ec);
-	buf->tail[0].iov_len += ec;
-	buf->len += ec;
-
 	/* copy plaintext gss token header after filler (if any) */
-	memcpy(ecptr + ec, buf->head[0].iov_base + offset,
-						GSS_KRB5_TOK_HDR_LEN);
+	memcpy(ecptr, buf->head[0].iov_base + offset, GSS_KRB5_TOK_HDR_LEN);
 	buf->tail[0].iov_len += GSS_KRB5_TOK_HDR_LEN;
 	buf->len += GSS_KRB5_TOK_HDR_LEN;
 
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index 62ae327..42768e5 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -70,31 +70,37 @@
 
 DEFINE_SPINLOCK(krb5_seq_lock);
 
-static char *
+static void *
 setup_token(struct krb5_ctx *ctx, struct xdr_netobj *token)
 {
-	__be16 *ptr, *krb5_hdr;
+	u16 *ptr;
+	void *krb5_hdr;
 	int body_size = GSS_KRB5_TOK_HDR_LEN + ctx->gk5e->cksumlength;
 
 	token->len = g_token_size(&ctx->mech_used, body_size);
 
-	ptr = (__be16 *)token->data;
+	ptr = (u16 *)token->data;
 	g_make_token_header(&ctx->mech_used, body_size, (unsigned char **)&ptr);
 
 	/* ptr now at start of header described in rfc 1964, section 1.2.1: */
 	krb5_hdr = ptr;
 	*ptr++ = KG_TOK_MIC_MSG;
-	*ptr++ = cpu_to_le16(ctx->gk5e->signalg);
+	/*
+	 * signalg is stored as if it were converted from LE to host endian, even
+	 * though it's an opaque pair of bytes according to the RFC.
+	 */
+	*ptr++ = (__force u16)cpu_to_le16(ctx->gk5e->signalg);
 	*ptr++ = SEAL_ALG_NONE;
-	*ptr++ = 0xffff;
+	*ptr = 0xffff;
 
-	return (char *)krb5_hdr;
+	return krb5_hdr;
 }
 
 static void *
 setup_token_v2(struct krb5_ctx *ctx, struct xdr_netobj *token)
 {
-	__be16 *ptr, *krb5_hdr;
+	u16 *ptr;
+	void *krb5_hdr;
 	u8 *p, flags = 0x00;
 
 	if ((ctx->flags & KRB5_CTX_FLAG_INITIATOR) == 0)
@@ -104,15 +110,15 @@
 
 	/* Per rfc 4121, sec 4.2.6.1, there is no header,
 	 * just start the token */
-	krb5_hdr = ptr = (__be16 *)token->data;
+	krb5_hdr = ptr = (u16 *)token->data;
 
 	*ptr++ = KG2_TOK_MIC;
 	p = (u8 *)ptr;
 	*p++ = flags;
 	*p++ = 0xff;
-	ptr = (__be16 *)p;
+	ptr = (u16 *)p;
 	*ptr++ = 0xffff;
-	*ptr++ = 0xffff;
+	*ptr = 0xffff;
 
 	token->len = GSS_KRB5_TOK_HDR_LEN + ctx->gk5e->cksumlength;
 	return krb5_hdr;
@@ -181,7 +187,7 @@
 	spin_lock(&krb5_seq_lock);
 	seq_send = ctx->seq_send64++;
 	spin_unlock(&krb5_seq_lock);
-	*((u64 *)(krb5_hdr + 8)) = cpu_to_be64(seq_send);
+	*((__be64 *)(krb5_hdr + 8)) = cpu_to_be64(seq_send);
 
 	if (ctx->initiate) {
 		cksumkey = ctx->initiator_sign;
diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index 42560e5..4b614c6 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -201,9 +201,15 @@
 
 	msg_start = ptr + GSS_KRB5_TOK_HDR_LEN + kctx->gk5e->cksumlength;
 
-	*(__be16 *)(ptr + 2) = cpu_to_le16(kctx->gk5e->signalg);
-	memset(ptr + 4, 0xff, 4);
-	*(__be16 *)(ptr + 4) = cpu_to_le16(kctx->gk5e->sealalg);
+	/*
+	 * signalg and sealalg are stored as if they were converted from LE
+	 * to host endian, even though they're opaque pairs of bytes according
+	 * to the RFC.
+	 */
+	*(__le16 *)(ptr + 2) = cpu_to_le16(kctx->gk5e->signalg);
+	*(__le16 *)(ptr + 4) = cpu_to_le16(kctx->gk5e->sealalg);
+	ptr[6] = 0xff;
+	ptr[7] = 0xff;
 
 	gss_krb5_make_confounder(msg_start, conflen);
 
@@ -438,7 +444,7 @@
 	u8		*ptr, *plainhdr;
 	s32		now;
 	u8		flags = 0x00;
-	__be16		*be16ptr, ec = 0;
+	__be16		*be16ptr;
 	__be64		*be64ptr;
 	u32		err;
 
@@ -468,16 +474,16 @@
 	be16ptr = (__be16 *)ptr;
 
 	blocksize = crypto_blkcipher_blocksize(kctx->acceptor_enc);
-	*be16ptr++ = cpu_to_be16(ec);
+	*be16ptr++ = 0;
 	/* "inner" token header always uses 0 for RRC */
-	*be16ptr++ = cpu_to_be16(0);
+	*be16ptr++ = 0;
 
 	be64ptr = (__be64 *)be16ptr;
 	spin_lock(&krb5_seq_lock);
 	*be64ptr = cpu_to_be64(kctx->seq_send64++);
 	spin_unlock(&krb5_seq_lock);
 
-	err = (*kctx->gk5e->encrypt_v2)(kctx, offset, buf, ec, pages);
+	err = (*kctx->gk5e->encrypt_v2)(kctx, offset, buf, pages);
 	if (err)
 		return err;
 
diff --git a/net/sunrpc/auth_null.c b/net/sunrpc/auth_null.c
index f0ebe07..712c123 100644
--- a/net/sunrpc/auth_null.c
+++ b/net/sunrpc/auth_null.c
@@ -35,6 +35,8 @@
 static struct rpc_cred *
 nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
 {
+	if (flags & RPCAUTH_LOOKUP_RCU)
+		return &null_cred;
 	return get_rpccred(&null_cred);
 }
 
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 2e6ab10..488ddee 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1746,6 +1746,7 @@
 	case -EHOSTDOWN:
 	case -EHOSTUNREACH:
 	case -ENETUNREACH:
+	case -ENOBUFS:
 	case -EPIPE:
 		dprintk("RPC: %5u remote rpcbind unreachable: %d\n",
 				task->tk_pid, task->tk_status);
@@ -1812,6 +1813,8 @@
 	case -ECONNABORTED:
 	case -ENETUNREACH:
 	case -EHOSTUNREACH:
+	case -ENOBUFS:
+	case -EPIPE:
 		if (RPC_IS_SOFTCONN(task))
 			break;
 		/* retry with existing socket, after a delay */
@@ -1918,6 +1921,7 @@
 	case -ECONNRESET:
 	case -ECONNABORTED:
 	case -ENOTCONN:
+	case -ENOBUFS:
 	case -EPIPE:
 		rpc_task_force_reencode(task);
 	}
@@ -2034,6 +2038,7 @@
 	case -ECONNRESET:
 	case -ECONNABORTED:
 		rpc_force_rebind(clnt);
+	case -ENOBUFS:
 		rpc_delay(task, 3*HZ);
 	case -EPIPE:
 	case -ENOTCONN:
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index b185548..2d12b76 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -195,7 +195,7 @@
 rpc_alloc_inode(struct super_block *sb)
 {
 	struct rpc_inode *rpci;
-	rpci = (struct rpc_inode *)kmem_cache_alloc(rpc_inode_cachep, GFP_KERNEL);
+	rpci = kmem_cache_alloc(rpc_inode_cachep, GFP_KERNEL);
 	if (!rpci)
 		return NULL;
 	return &rpci->vfs_inode;
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 51c6316..56e4e15 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -744,6 +744,7 @@
 	case -ECONNABORTED:
 	case -ENETUNREACH:
 	case -EHOSTUNREACH:
+	case -EPIPE:
 	case -EAGAIN:
 		dprintk("RPC: %5u xprt_connect_status: retrying\n", task->tk_pid);
 		break;
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 693966d..6166c98 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -53,14 +53,6 @@
 # define RPCDBG_FACILITY	RPCDBG_TRANS
 #endif
 
-enum rpcrdma_chunktype {
-	rpcrdma_noch = 0,
-	rpcrdma_readch,
-	rpcrdma_areadch,
-	rpcrdma_writech,
-	rpcrdma_replych
-};
-
 #ifdef RPC_DEBUG
 static const char transfertypes[][12] = {
 	"pure inline",	/* no chunks */
@@ -279,13 +271,37 @@
 	return (unsigned char *)iptr - (unsigned char *)headerp;
 
 out:
-	for (pos = 0; nchunks--;)
-		pos += rpcrdma_deregister_external(
-				&req->rl_segments[pos], r_xprt);
+	if (r_xprt->rx_ia.ri_memreg_strategy != RPCRDMA_FRMR) {
+		for (pos = 0; nchunks--;)
+			pos += rpcrdma_deregister_external(
+					&req->rl_segments[pos], r_xprt);
+	}
 	return n;
 }
 
 /*
+ * Marshal chunks. This routine returns the header length
+ * consumed by marshaling.
+ *
+ * Returns positive RPC/RDMA header size, or negative errno.
+ */
+
+ssize_t
+rpcrdma_marshal_chunks(struct rpc_rqst *rqst, ssize_t result)
+{
+	struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
+	struct rpcrdma_msg *headerp = (struct rpcrdma_msg *)req->rl_base;
+
+	if (req->rl_rtype != rpcrdma_noch)
+		result = rpcrdma_create_chunks(rqst, &rqst->rq_snd_buf,
+					       headerp, req->rl_rtype);
+	else if (req->rl_wtype != rpcrdma_noch)
+		result = rpcrdma_create_chunks(rqst, &rqst->rq_rcv_buf,
+					       headerp, req->rl_wtype);
+	return result;
+}
+
+/*
  * Copy write data inline.
  * This function is used for "small" requests. Data which is passed
  * to RPC via iovecs (or page list) is copied directly into the
@@ -377,7 +393,6 @@
 	char *base;
 	size_t rpclen, padlen;
 	ssize_t hdrlen;
-	enum rpcrdma_chunktype rtype, wtype;
 	struct rpcrdma_msg *headerp;
 
 	/*
@@ -415,13 +430,13 @@
 	 * into pages; otherwise use reply chunks.
 	 */
 	if (rqst->rq_rcv_buf.buflen <= RPCRDMA_INLINE_READ_THRESHOLD(rqst))
-		wtype = rpcrdma_noch;
+		req->rl_wtype = rpcrdma_noch;
 	else if (rqst->rq_rcv_buf.page_len == 0)
-		wtype = rpcrdma_replych;
+		req->rl_wtype = rpcrdma_replych;
 	else if (rqst->rq_rcv_buf.flags & XDRBUF_READ)
-		wtype = rpcrdma_writech;
+		req->rl_wtype = rpcrdma_writech;
 	else
-		wtype = rpcrdma_replych;
+		req->rl_wtype = rpcrdma_replych;
 
 	/*
 	 * Chunks needed for arguments?
@@ -438,16 +453,16 @@
 	 * TBD check NFSv4 setacl
 	 */
 	if (rqst->rq_snd_buf.len <= RPCRDMA_INLINE_WRITE_THRESHOLD(rqst))
-		rtype = rpcrdma_noch;
+		req->rl_rtype = rpcrdma_noch;
 	else if (rqst->rq_snd_buf.page_len == 0)
-		rtype = rpcrdma_areadch;
+		req->rl_rtype = rpcrdma_areadch;
 	else
-		rtype = rpcrdma_readch;
+		req->rl_rtype = rpcrdma_readch;
 
 	/* The following simplification is not true forever */
-	if (rtype != rpcrdma_noch && wtype == rpcrdma_replych)
-		wtype = rpcrdma_noch;
-	if (rtype != rpcrdma_noch && wtype != rpcrdma_noch) {
+	if (req->rl_rtype != rpcrdma_noch && req->rl_wtype == rpcrdma_replych)
+		req->rl_wtype = rpcrdma_noch;
+	if (req->rl_rtype != rpcrdma_noch && req->rl_wtype != rpcrdma_noch) {
 		dprintk("RPC:       %s: cannot marshal multiple chunk lists\n",
 			__func__);
 		return -EIO;
@@ -461,7 +476,7 @@
 	 * When padding is in use and applies to the transfer, insert
 	 * it and change the message type.
 	 */
-	if (rtype == rpcrdma_noch) {
+	if (req->rl_rtype == rpcrdma_noch) {
 
 		padlen = rpcrdma_inline_pullup(rqst,
 						RPCRDMA_INLINE_PAD_VALUE(rqst));
@@ -476,7 +491,7 @@
 			headerp->rm_body.rm_padded.rm_pempty[1] = xdr_zero;
 			headerp->rm_body.rm_padded.rm_pempty[2] = xdr_zero;
 			hdrlen += 2 * sizeof(u32); /* extra words in padhdr */
-			if (wtype != rpcrdma_noch) {
+			if (req->rl_wtype != rpcrdma_noch) {
 				dprintk("RPC:       %s: invalid chunk list\n",
 					__func__);
 				return -EIO;
@@ -497,30 +512,18 @@
 			 * on receive. Therefore, we request a reply chunk
 			 * for non-writes wherever feasible and efficient.
 			 */
-			if (wtype == rpcrdma_noch)
-				wtype = rpcrdma_replych;
+			if (req->rl_wtype == rpcrdma_noch)
+				req->rl_wtype = rpcrdma_replych;
 		}
 	}
 
-	/*
-	 * Marshal chunks. This routine will return the header length
-	 * consumed by marshaling.
-	 */
-	if (rtype != rpcrdma_noch) {
-		hdrlen = rpcrdma_create_chunks(rqst,
-					&rqst->rq_snd_buf, headerp, rtype);
-		wtype = rtype;	/* simplify dprintk */
-
-	} else if (wtype != rpcrdma_noch) {
-		hdrlen = rpcrdma_create_chunks(rqst,
-					&rqst->rq_rcv_buf, headerp, wtype);
-	}
+	hdrlen = rpcrdma_marshal_chunks(rqst, hdrlen);
 	if (hdrlen < 0)
 		return hdrlen;
 
 	dprintk("RPC:       %s: %s: hdrlen %zd rpclen %zd padlen %zd"
 		" headerp 0x%p base 0x%p lkey 0x%x\n",
-		__func__, transfertypes[wtype], hdrlen, rpclen, padlen,
+		__func__, transfertypes[req->rl_wtype], hdrlen, rpclen, padlen,
 		headerp, base, req->rl_iov.lkey);
 
 	/*
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 66f91f0..2faac49 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -296,7 +296,6 @@
 
 	xprt->resvport = 0;		/* privileged port not needed */
 	xprt->tsh_size = 0;		/* RPC-RDMA handles framing */
-	xprt->max_payload = RPCRDMA_MAX_DATA_SEGS * PAGE_SIZE;
 	xprt->ops = &xprt_rdma_procs;
 
 	/*
@@ -382,6 +381,9 @@
 	new_ep->rep_xprt = xprt;
 
 	xprt_rdma_format_addresses(xprt);
+	xprt->max_payload = rpcrdma_max_payload(new_xprt);
+	dprintk("RPC:       %s: transport data payload maximum: %zu bytes\n",
+		__func__, xprt->max_payload);
 
 	if (!try_module_get(THIS_MODULE))
 		goto out4;
@@ -412,7 +414,7 @@
 	if (r_xprt->rx_ep.rep_connected > 0)
 		xprt->reestablish_timeout = 0;
 	xprt_disconnect_done(xprt);
-	(void) rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
+	rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
 }
 
 static void
@@ -595,13 +597,14 @@
 	struct rpc_xprt *xprt = rqst->rq_xprt;
 	struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
 	struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
-	int rc;
+	int rc = 0;
 
-	if (req->rl_niovs == 0) {
+	if (req->rl_niovs == 0)
 		rc = rpcrdma_marshal_req(rqst);
-		if (rc < 0)
-			goto failed_marshal;
-	}
+	else if (r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_FRMR)
+		rc = rpcrdma_marshal_chunks(rqst, 0);
+	if (rc < 0)
+		goto failed_marshal;
 
 	if (req->rl_reply == NULL) 		/* e.g. reconnection */
 		rpcrdma_recv_buffer_get(req);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 13dbd1c..61c4129 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -61,6 +61,8 @@
 # define RPCDBG_FACILITY	RPCDBG_TRANS
 #endif
 
+static void rpcrdma_reset_frmrs(struct rpcrdma_ia *);
+
 /*
  * internal functions
  */
@@ -103,17 +105,6 @@
 
 static DECLARE_TASKLET(rpcrdma_tasklet_g, rpcrdma_run_tasklet, 0UL);
 
-static inline void
-rpcrdma_schedule_tasklet(struct rpcrdma_rep *rep)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&rpcrdma_tk_lock_g, flags);
-	list_add_tail(&rep->rr_list, &rpcrdma_tasklets_g);
-	spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags);
-	tasklet_schedule(&rpcrdma_tasklet_g);
-}
-
 static void
 rpcrdma_qp_async_error_upcall(struct ib_event *event, void *context)
 {
@@ -153,12 +144,7 @@
 	if (wc->wr_id == 0ULL)
 		return;
 	if (wc->status != IB_WC_SUCCESS)
-		return;
-
-	if (wc->opcode == IB_WC_FAST_REG_MR)
-		frmr->r.frmr.state = FRMR_IS_VALID;
-	else if (wc->opcode == IB_WC_LOCAL_INV)
-		frmr->r.frmr.state = FRMR_IS_INVALID;
+		frmr->r.frmr.fr_state = FRMR_IS_STALE;
 }
 
 static int
@@ -217,7 +203,7 @@
 }
 
 static void
-rpcrdma_recvcq_process_wc(struct ib_wc *wc)
+rpcrdma_recvcq_process_wc(struct ib_wc *wc, struct list_head *sched_list)
 {
 	struct rpcrdma_rep *rep =
 			(struct rpcrdma_rep *)(unsigned long)wc->wr_id;
@@ -248,28 +234,38 @@
 	}
 
 out_schedule:
-	rpcrdma_schedule_tasklet(rep);
+	list_add_tail(&rep->rr_list, sched_list);
 }
 
 static int
 rpcrdma_recvcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep)
 {
+	struct list_head sched_list;
 	struct ib_wc *wcs;
 	int budget, count, rc;
+	unsigned long flags;
 
+	INIT_LIST_HEAD(&sched_list);
 	budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE;
 	do {
 		wcs = ep->rep_recv_wcs;
 
 		rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs);
 		if (rc <= 0)
-			return rc;
+			goto out_schedule;
 
 		count = rc;
 		while (count-- > 0)
-			rpcrdma_recvcq_process_wc(wcs++);
+			rpcrdma_recvcq_process_wc(wcs++, &sched_list);
 	} while (rc == RPCRDMA_POLLSIZE && --budget);
-	return 0;
+	rc = 0;
+
+out_schedule:
+	spin_lock_irqsave(&rpcrdma_tk_lock_g, flags);
+	list_splice_tail(&sched_list, &rpcrdma_tasklets_g);
+	spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags);
+	tasklet_schedule(&rpcrdma_tasklet_g);
+	return rc;
 }
 
 /*
@@ -310,6 +306,13 @@
 	rpcrdma_recvcq_poll(cq, ep);
 }
 
+static void
+rpcrdma_flush_cqs(struct rpcrdma_ep *ep)
+{
+	rpcrdma_recvcq_upcall(ep->rep_attr.recv_cq, ep);
+	rpcrdma_sendcq_upcall(ep->rep_attr.send_cq, ep);
+}
+
 #ifdef RPC_DEBUG
 static const char * const conn[] = {
 	"address resolved",
@@ -323,8 +326,16 @@
 	"rejected",
 	"established",
 	"disconnected",
-	"device removal"
+	"device removal",
+	"multicast join",
+	"multicast error",
+	"address change",
+	"timewait exit",
 };
+
+#define CONNECTION_MSG(status)						\
+	((status) < ARRAY_SIZE(conn) ?					\
+		conn[(status)] : "unrecognized connection error")
 #endif
 
 static int
@@ -382,23 +393,18 @@
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 		connstate = -ENODEV;
 connected:
-		dprintk("RPC:       %s: %s: %pI4:%u (ep 0x%p event 0x%x)\n",
-			__func__,
-			(event->event <= 11) ? conn[event->event] :
-						"unknown connection error",
-			&addr->sin_addr.s_addr,
-			ntohs(addr->sin_port),
-			ep, event->event);
 		atomic_set(&rpcx_to_rdmax(ep->rep_xprt)->rx_buf.rb_credits, 1);
 		dprintk("RPC:       %s: %sconnected\n",
 					__func__, connstate > 0 ? "" : "dis");
 		ep->rep_connected = connstate;
 		ep->rep_func(ep);
 		wake_up_all(&ep->rep_connect_wait);
-		break;
+		/*FALLTHROUGH*/
 	default:
-		dprintk("RPC:       %s: unexpected CM event %d\n",
-			__func__, event->event);
+		dprintk("RPC:       %s: %pI4:%u (ep 0x%p): %s\n",
+			__func__, &addr->sin_addr.s_addr,
+			ntohs(addr->sin_port), ep,
+			CONNECTION_MSG(event->event));
 		break;
 	}
 
@@ -558,12 +564,7 @@
 		if (!ia->ri_id->device->alloc_fmr) {
 			dprintk("RPC:       %s: MTHCAFMR registration "
 				"not supported by HCA\n", __func__);
-#if RPCRDMA_PERSISTENT_REGISTRATION
 			memreg = RPCRDMA_ALLPHYSICAL;
-#else
-			rc = -ENOMEM;
-			goto out2;
-#endif
 		}
 	}
 
@@ -578,20 +579,16 @@
 	switch (memreg) {
 	case RPCRDMA_FRMR:
 		break;
-#if RPCRDMA_PERSISTENT_REGISTRATION
 	case RPCRDMA_ALLPHYSICAL:
 		mem_priv = IB_ACCESS_LOCAL_WRITE |
 				IB_ACCESS_REMOTE_WRITE |
 				IB_ACCESS_REMOTE_READ;
 		goto register_setup;
-#endif
 	case RPCRDMA_MTHCAFMR:
 		if (ia->ri_have_dma_lkey)
 			break;
 		mem_priv = IB_ACCESS_LOCAL_WRITE;
-#if RPCRDMA_PERSISTENT_REGISTRATION
 	register_setup:
-#endif
 		ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv);
 		if (IS_ERR(ia->ri_bind_mem)) {
 			printk(KERN_ALERT "%s: ib_get_dma_mr for "
@@ -613,6 +610,7 @@
 	/* Else will do memory reg/dereg for each chunk */
 	ia->ri_memreg_strategy = memreg;
 
+	rwlock_init(&ia->ri_qplock);
 	return 0;
 out2:
 	rdma_destroy_id(ia->ri_id);
@@ -826,10 +824,7 @@
 	cancel_delayed_work_sync(&ep->rep_connect_worker);
 
 	if (ia->ri_id->qp) {
-		rc = rpcrdma_ep_disconnect(ep, ia);
-		if (rc)
-			dprintk("RPC:       %s: rpcrdma_ep_disconnect"
-				" returned %i\n", __func__, rc);
+		rpcrdma_ep_disconnect(ep, ia);
 		rdma_destroy_qp(ia->ri_id);
 		ia->ri_id->qp = NULL;
 	}
@@ -859,7 +854,7 @@
 int
 rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
 {
-	struct rdma_cm_id *id;
+	struct rdma_cm_id *id, *old;
 	int rc = 0;
 	int retry_count = 0;
 
@@ -867,13 +862,12 @@
 		struct rpcrdma_xprt *xprt;
 retry:
 		dprintk("RPC:       %s: reconnecting...\n", __func__);
-		rc = rpcrdma_ep_disconnect(ep, ia);
-		if (rc && rc != -ENOTCONN)
-			dprintk("RPC:       %s: rpcrdma_ep_disconnect"
-				" status %i\n", __func__, rc);
 
-		rpcrdma_clean_cq(ep->rep_attr.recv_cq);
-		rpcrdma_clean_cq(ep->rep_attr.send_cq);
+		rpcrdma_ep_disconnect(ep, ia);
+		rpcrdma_flush_cqs(ep);
+
+		if (ia->ri_memreg_strategy == RPCRDMA_FRMR)
+			rpcrdma_reset_frmrs(ia);
 
 		xprt = container_of(ia, struct rpcrdma_xprt, rx_ia);
 		id = rpcrdma_create_id(xprt, ia,
@@ -905,9 +899,14 @@
 			rc = -ENETUNREACH;
 			goto out;
 		}
-		rdma_destroy_qp(ia->ri_id);
-		rdma_destroy_id(ia->ri_id);
+
+		write_lock(&ia->ri_qplock);
+		old = ia->ri_id;
 		ia->ri_id = id;
+		write_unlock(&ia->ri_qplock);
+
+		rdma_destroy_qp(old);
+		rdma_destroy_id(old);
 	} else {
 		dprintk("RPC:       %s: connecting...\n", __func__);
 		rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr);
@@ -974,13 +973,12 @@
  * This call is not reentrant, and must not be made in parallel
  * on the same endpoint.
  */
-int
+void
 rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
 {
 	int rc;
 
-	rpcrdma_clean_cq(ep->rep_attr.recv_cq);
-	rpcrdma_clean_cq(ep->rep_attr.send_cq);
+	rpcrdma_flush_cqs(ep);
 	rc = rdma_disconnect(ia->ri_id);
 	if (!rc) {
 		/* returns without wait if not connected */
@@ -992,12 +990,93 @@
 		dprintk("RPC:       %s: rdma_disconnect %i\n", __func__, rc);
 		ep->rep_connected = rc;
 	}
+}
+
+static int
+rpcrdma_init_fmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf)
+{
+	int mr_access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ;
+	struct ib_fmr_attr fmr_attr = {
+		.max_pages	= RPCRDMA_MAX_DATA_SEGS,
+		.max_maps	= 1,
+		.page_shift	= PAGE_SHIFT
+	};
+	struct rpcrdma_mw *r;
+	int i, rc;
+
+	i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS;
+	dprintk("RPC:       %s: initalizing %d FMRs\n", __func__, i);
+
+	while (i--) {
+		r = kzalloc(sizeof(*r), GFP_KERNEL);
+		if (r == NULL)
+			return -ENOMEM;
+
+		r->r.fmr = ib_alloc_fmr(ia->ri_pd, mr_access_flags, &fmr_attr);
+		if (IS_ERR(r->r.fmr)) {
+			rc = PTR_ERR(r->r.fmr);
+			dprintk("RPC:       %s: ib_alloc_fmr failed %i\n",
+				__func__, rc);
+			goto out_free;
+		}
+
+		list_add(&r->mw_list, &buf->rb_mws);
+		list_add(&r->mw_all, &buf->rb_all);
+	}
+	return 0;
+
+out_free:
+	kfree(r);
 	return rc;
 }
 
-/*
- * Initialize buffer memory
- */
+static int
+rpcrdma_init_frmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_frmr *f;
+	struct rpcrdma_mw *r;
+	int i, rc;
+
+	i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS;
+	dprintk("RPC:       %s: initalizing %d FRMRs\n", __func__, i);
+
+	while (i--) {
+		r = kzalloc(sizeof(*r), GFP_KERNEL);
+		if (r == NULL)
+			return -ENOMEM;
+		f = &r->r.frmr;
+
+		f->fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd,
+						ia->ri_max_frmr_depth);
+		if (IS_ERR(f->fr_mr)) {
+			rc = PTR_ERR(f->fr_mr);
+			dprintk("RPC:       %s: ib_alloc_fast_reg_mr "
+				"failed %i\n", __func__, rc);
+			goto out_free;
+		}
+
+		f->fr_pgl = ib_alloc_fast_reg_page_list(ia->ri_id->device,
+							ia->ri_max_frmr_depth);
+		if (IS_ERR(f->fr_pgl)) {
+			rc = PTR_ERR(f->fr_pgl);
+			dprintk("RPC:       %s: ib_alloc_fast_reg_page_list "
+				"failed %i\n", __func__, rc);
+
+			ib_dereg_mr(f->fr_mr);
+			goto out_free;
+		}
+
+		list_add(&r->mw_list, &buf->rb_mws);
+		list_add(&r->mw_all, &buf->rb_all);
+	}
+
+	return 0;
+
+out_free:
+	kfree(r);
+	return rc;
+}
+
 int
 rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep,
 	struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata)
@@ -1005,7 +1084,6 @@
 	char *p;
 	size_t len, rlen, wlen;
 	int i, rc;
-	struct rpcrdma_mw *r;
 
 	buf->rb_max_requests = cdata->max_requests;
 	spin_lock_init(&buf->rb_lock);
@@ -1016,28 +1094,12 @@
 	 *   2.  arrays of struct rpcrdma_req to fill in pointers
 	 *   3.  array of struct rpcrdma_rep for replies
 	 *   4.  padding, if any
-	 *   5.  mw's, fmr's or frmr's, if any
 	 * Send/recv buffers in req/rep need to be registered
 	 */
-
 	len = buf->rb_max_requests *
 		(sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *));
 	len += cdata->padding;
-	switch (ia->ri_memreg_strategy) {
-	case RPCRDMA_FRMR:
-		len += buf->rb_max_requests * RPCRDMA_MAX_SEGS *
-				sizeof(struct rpcrdma_mw);
-		break;
-	case RPCRDMA_MTHCAFMR:
-		/* TBD we are perhaps overallocating here */
-		len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS *
-				sizeof(struct rpcrdma_mw);
-		break;
-	default:
-		break;
-	}
 
-	/* allocate 1, 4 and 5 in one shot */
 	p = kzalloc(len, GFP_KERNEL);
 	if (p == NULL) {
 		dprintk("RPC:       %s: req_t/rep_t/pad kzalloc(%zd) failed\n",
@@ -1064,51 +1126,17 @@
 	p += cdata->padding;
 
 	INIT_LIST_HEAD(&buf->rb_mws);
-	r = (struct rpcrdma_mw *)p;
+	INIT_LIST_HEAD(&buf->rb_all);
 	switch (ia->ri_memreg_strategy) {
 	case RPCRDMA_FRMR:
-		for (i = buf->rb_max_requests * RPCRDMA_MAX_SEGS; i; i--) {
-			r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd,
-						ia->ri_max_frmr_depth);
-			if (IS_ERR(r->r.frmr.fr_mr)) {
-				rc = PTR_ERR(r->r.frmr.fr_mr);
-				dprintk("RPC:       %s: ib_alloc_fast_reg_mr"
-					" failed %i\n", __func__, rc);
-				goto out;
-			}
-			r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list(
-						ia->ri_id->device,
-						ia->ri_max_frmr_depth);
-			if (IS_ERR(r->r.frmr.fr_pgl)) {
-				rc = PTR_ERR(r->r.frmr.fr_pgl);
-				dprintk("RPC:       %s: "
-					"ib_alloc_fast_reg_page_list "
-					"failed %i\n", __func__, rc);
-
-				ib_dereg_mr(r->r.frmr.fr_mr);
-				goto out;
-			}
-			list_add(&r->mw_list, &buf->rb_mws);
-			++r;
-		}
+		rc = rpcrdma_init_frmrs(ia, buf);
+		if (rc)
+			goto out;
 		break;
 	case RPCRDMA_MTHCAFMR:
-		/* TBD we are perhaps overallocating here */
-		for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) {
-			static struct ib_fmr_attr fa =
-				{ RPCRDMA_MAX_DATA_SEGS, 1, PAGE_SHIFT };
-			r->r.fmr = ib_alloc_fmr(ia->ri_pd,
-				IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ,
-				&fa);
-			if (IS_ERR(r->r.fmr)) {
-				rc = PTR_ERR(r->r.fmr);
-				dprintk("RPC:       %s: ib_alloc_fmr"
-					" failed %i\n", __func__, rc);
-				goto out;
-			}
-			list_add(&r->mw_list, &buf->rb_mws);
-			++r;
-		}
+		rc = rpcrdma_init_fmrs(ia, buf);
+		if (rc)
+			goto out;
 		break;
 	default:
 		break;
@@ -1176,24 +1204,57 @@
 	return rc;
 }
 
-/*
- * Unregister and destroy buffer memory. Need to deal with
- * partial initialization, so it's callable from failed create.
- * Must be called before destroying endpoint, as registrations
- * reference it.
- */
+static void
+rpcrdma_destroy_fmrs(struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_mw *r;
+	int rc;
+
+	while (!list_empty(&buf->rb_all)) {
+		r = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all);
+		list_del(&r->mw_all);
+		list_del(&r->mw_list);
+
+		rc = ib_dealloc_fmr(r->r.fmr);
+		if (rc)
+			dprintk("RPC:       %s: ib_dealloc_fmr failed %i\n",
+				__func__, rc);
+
+		kfree(r);
+	}
+}
+
+static void
+rpcrdma_destroy_frmrs(struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_mw *r;
+	int rc;
+
+	while (!list_empty(&buf->rb_all)) {
+		r = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all);
+		list_del(&r->mw_all);
+		list_del(&r->mw_list);
+
+		rc = ib_dereg_mr(r->r.frmr.fr_mr);
+		if (rc)
+			dprintk("RPC:       %s: ib_dereg_mr failed %i\n",
+				__func__, rc);
+		ib_free_fast_reg_page_list(r->r.frmr.fr_pgl);
+
+		kfree(r);
+	}
+}
+
 void
 rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
 {
-	int rc, i;
 	struct rpcrdma_ia *ia = rdmab_to_ia(buf);
-	struct rpcrdma_mw *r;
+	int i;
 
 	/* clean up in reverse order from create
 	 *   1.  recv mr memory (mr free, then kfree)
 	 *   2.  send mr memory (mr free, then kfree)
-	 *   3.  padding (if any) [moved to rpcrdma_ep_destroy]
-	 *   4.  arrays
+	 *   3.  MWs
 	 */
 	dprintk("RPC:       %s: entering\n", __func__);
 
@@ -1212,36 +1273,219 @@
 		}
 	}
 
-	while (!list_empty(&buf->rb_mws)) {
-		r = list_entry(buf->rb_mws.next,
-			struct rpcrdma_mw, mw_list);
-		list_del(&r->mw_list);
-		switch (ia->ri_memreg_strategy) {
-		case RPCRDMA_FRMR:
-			rc = ib_dereg_mr(r->r.frmr.fr_mr);
-			if (rc)
-				dprintk("RPC:       %s:"
-					" ib_dereg_mr"
-					" failed %i\n",
-					__func__, rc);
-			ib_free_fast_reg_page_list(r->r.frmr.fr_pgl);
-			break;
-		case RPCRDMA_MTHCAFMR:
-			rc = ib_dealloc_fmr(r->r.fmr);
-			if (rc)
-				dprintk("RPC:       %s:"
-					" ib_dealloc_fmr"
-					" failed %i\n",
-					__func__, rc);
-			break;
-		default:
-			break;
-		}
+	switch (ia->ri_memreg_strategy) {
+	case RPCRDMA_FRMR:
+		rpcrdma_destroy_frmrs(buf);
+		break;
+	case RPCRDMA_MTHCAFMR:
+		rpcrdma_destroy_fmrs(buf);
+		break;
+	default:
+		break;
 	}
 
 	kfree(buf->rb_pool);
 }
 
+/* After a disconnect, a flushed FAST_REG_MR can leave an FRMR in
+ * an unusable state. Find FRMRs in this state and dereg / reg
+ * each.  FRMRs that are VALID and attached to an rpcrdma_req are
+ * also torn down.
+ *
+ * This gives all in-use FRMRs a fresh rkey and leaves them INVALID.
+ *
+ * This is invoked only in the transport connect worker in order
+ * to serialize with rpcrdma_register_frmr_external().
+ */
+static void
+rpcrdma_reset_frmrs(struct rpcrdma_ia *ia)
+{
+	struct rpcrdma_xprt *r_xprt =
+				container_of(ia, struct rpcrdma_xprt, rx_ia);
+	struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
+	struct list_head *pos;
+	struct rpcrdma_mw *r;
+	int rc;
+
+	list_for_each(pos, &buf->rb_all) {
+		r = list_entry(pos, struct rpcrdma_mw, mw_all);
+
+		if (r->r.frmr.fr_state == FRMR_IS_INVALID)
+			continue;
+
+		rc = ib_dereg_mr(r->r.frmr.fr_mr);
+		if (rc)
+			dprintk("RPC:       %s: ib_dereg_mr failed %i\n",
+				__func__, rc);
+		ib_free_fast_reg_page_list(r->r.frmr.fr_pgl);
+
+		r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd,
+					ia->ri_max_frmr_depth);
+		if (IS_ERR(r->r.frmr.fr_mr)) {
+			rc = PTR_ERR(r->r.frmr.fr_mr);
+			dprintk("RPC:       %s: ib_alloc_fast_reg_mr"
+				" failed %i\n", __func__, rc);
+			continue;
+		}
+		r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list(
+					ia->ri_id->device,
+					ia->ri_max_frmr_depth);
+		if (IS_ERR(r->r.frmr.fr_pgl)) {
+			rc = PTR_ERR(r->r.frmr.fr_pgl);
+			dprintk("RPC:       %s: "
+				"ib_alloc_fast_reg_page_list "
+				"failed %i\n", __func__, rc);
+
+			ib_dereg_mr(r->r.frmr.fr_mr);
+			continue;
+		}
+		r->r.frmr.fr_state = FRMR_IS_INVALID;
+	}
+}
+
+/* "*mw" can be NULL when rpcrdma_buffer_get_mrs() fails, leaving
+ * some req segments uninitialized.
+ */
+static void
+rpcrdma_buffer_put_mr(struct rpcrdma_mw **mw, struct rpcrdma_buffer *buf)
+{
+	if (*mw) {
+		list_add_tail(&(*mw)->mw_list, &buf->rb_mws);
+		*mw = NULL;
+	}
+}
+
+/* Cycle mw's back in reverse order, and "spin" them.
+ * This delays and scrambles reuse as much as possible.
+ */
+static void
+rpcrdma_buffer_put_mrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_mr_seg *seg = req->rl_segments;
+	struct rpcrdma_mr_seg *seg1 = seg;
+	int i;
+
+	for (i = 1, seg++; i < RPCRDMA_MAX_SEGS; seg++, i++)
+		rpcrdma_buffer_put_mr(&seg->mr_chunk.rl_mw, buf);
+	rpcrdma_buffer_put_mr(&seg1->mr_chunk.rl_mw, buf);
+}
+
+static void
+rpcrdma_buffer_put_sendbuf(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
+{
+	buf->rb_send_bufs[--buf->rb_send_index] = req;
+	req->rl_niovs = 0;
+	if (req->rl_reply) {
+		buf->rb_recv_bufs[--buf->rb_recv_index] = req->rl_reply;
+		req->rl_reply->rr_func = NULL;
+		req->rl_reply = NULL;
+	}
+}
+
+/* rpcrdma_unmap_one() was already done by rpcrdma_deregister_frmr_external().
+ * Redo only the ib_post_send().
+ */
+static void
+rpcrdma_retry_local_inv(struct rpcrdma_mw *r, struct rpcrdma_ia *ia)
+{
+	struct rpcrdma_xprt *r_xprt =
+				container_of(ia, struct rpcrdma_xprt, rx_ia);
+	struct ib_send_wr invalidate_wr, *bad_wr;
+	int rc;
+
+	dprintk("RPC:       %s: FRMR %p is stale\n", __func__, r);
+
+	/* When this FRMR is re-inserted into rb_mws, it is no longer stale */
+	r->r.frmr.fr_state = FRMR_IS_INVALID;
+
+	memset(&invalidate_wr, 0, sizeof(invalidate_wr));
+	invalidate_wr.wr_id = (unsigned long)(void *)r;
+	invalidate_wr.opcode = IB_WR_LOCAL_INV;
+	invalidate_wr.ex.invalidate_rkey = r->r.frmr.fr_mr->rkey;
+	DECR_CQCOUNT(&r_xprt->rx_ep);
+
+	dprintk("RPC:       %s: frmr %p invalidating rkey %08x\n",
+		__func__, r, r->r.frmr.fr_mr->rkey);
+
+	read_lock(&ia->ri_qplock);
+	rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr);
+	read_unlock(&ia->ri_qplock);
+	if (rc) {
+		/* Force rpcrdma_buffer_get() to retry */
+		r->r.frmr.fr_state = FRMR_IS_STALE;
+		dprintk("RPC:       %s: ib_post_send failed, %i\n",
+			__func__, rc);
+	}
+}
+
+static void
+rpcrdma_retry_flushed_linv(struct list_head *stale,
+			   struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_ia *ia = rdmab_to_ia(buf);
+	struct list_head *pos;
+	struct rpcrdma_mw *r;
+	unsigned long flags;
+
+	list_for_each(pos, stale) {
+		r = list_entry(pos, struct rpcrdma_mw, mw_list);
+		rpcrdma_retry_local_inv(r, ia);
+	}
+
+	spin_lock_irqsave(&buf->rb_lock, flags);
+	list_splice_tail(stale, &buf->rb_mws);
+	spin_unlock_irqrestore(&buf->rb_lock, flags);
+}
+
+static struct rpcrdma_req *
+rpcrdma_buffer_get_frmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf,
+			 struct list_head *stale)
+{
+	struct rpcrdma_mw *r;
+	int i;
+
+	i = RPCRDMA_MAX_SEGS - 1;
+	while (!list_empty(&buf->rb_mws)) {
+		r = list_entry(buf->rb_mws.next,
+			       struct rpcrdma_mw, mw_list);
+		list_del(&r->mw_list);
+		if (r->r.frmr.fr_state == FRMR_IS_STALE) {
+			list_add(&r->mw_list, stale);
+			continue;
+		}
+		req->rl_segments[i].mr_chunk.rl_mw = r;
+		if (unlikely(i-- == 0))
+			return req;	/* Success */
+	}
+
+	/* Not enough entries on rb_mws for this req */
+	rpcrdma_buffer_put_sendbuf(req, buf);
+	rpcrdma_buffer_put_mrs(req, buf);
+	return NULL;
+}
+
+static struct rpcrdma_req *
+rpcrdma_buffer_get_fmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
+{
+	struct rpcrdma_mw *r;
+	int i;
+
+	i = RPCRDMA_MAX_SEGS - 1;
+	while (!list_empty(&buf->rb_mws)) {
+		r = list_entry(buf->rb_mws.next,
+			       struct rpcrdma_mw, mw_list);
+		list_del(&r->mw_list);
+		req->rl_segments[i].mr_chunk.rl_mw = r;
+		if (unlikely(i-- == 0))
+			return req;	/* Success */
+	}
+
+	/* Not enough entries on rb_mws for this req */
+	rpcrdma_buffer_put_sendbuf(req, buf);
+	rpcrdma_buffer_put_mrs(req, buf);
+	return NULL;
+}
+
 /*
  * Get a set of request/reply buffers.
  *
@@ -1254,10 +1498,10 @@
 struct rpcrdma_req *
 rpcrdma_buffer_get(struct rpcrdma_buffer *buffers)
 {
+	struct rpcrdma_ia *ia = rdmab_to_ia(buffers);
+	struct list_head stale;
 	struct rpcrdma_req *req;
 	unsigned long flags;
-	int i;
-	struct rpcrdma_mw *r;
 
 	spin_lock_irqsave(&buffers->rb_lock, flags);
 	if (buffers->rb_send_index == buffers->rb_max_requests) {
@@ -1277,16 +1521,21 @@
 		buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL;
 	}
 	buffers->rb_send_bufs[buffers->rb_send_index++] = NULL;
-	if (!list_empty(&buffers->rb_mws)) {
-		i = RPCRDMA_MAX_SEGS - 1;
-		do {
-			r = list_entry(buffers->rb_mws.next,
-					struct rpcrdma_mw, mw_list);
-			list_del(&r->mw_list);
-			req->rl_segments[i].mr_chunk.rl_mw = r;
-		} while (--i >= 0);
+
+	INIT_LIST_HEAD(&stale);
+	switch (ia->ri_memreg_strategy) {
+	case RPCRDMA_FRMR:
+		req = rpcrdma_buffer_get_frmrs(req, buffers, &stale);
+		break;
+	case RPCRDMA_MTHCAFMR:
+		req = rpcrdma_buffer_get_fmrs(req, buffers);
+		break;
+	default:
+		break;
 	}
 	spin_unlock_irqrestore(&buffers->rb_lock, flags);
+	if (!list_empty(&stale))
+		rpcrdma_retry_flushed_linv(&stale, buffers);
 	return req;
 }
 
@@ -1299,34 +1548,14 @@
 {
 	struct rpcrdma_buffer *buffers = req->rl_buffer;
 	struct rpcrdma_ia *ia = rdmab_to_ia(buffers);
-	int i;
 	unsigned long flags;
 
 	spin_lock_irqsave(&buffers->rb_lock, flags);
-	buffers->rb_send_bufs[--buffers->rb_send_index] = req;
-	req->rl_niovs = 0;
-	if (req->rl_reply) {
-		buffers->rb_recv_bufs[--buffers->rb_recv_index] = req->rl_reply;
-		req->rl_reply->rr_func = NULL;
-		req->rl_reply = NULL;
-	}
+	rpcrdma_buffer_put_sendbuf(req, buffers);
 	switch (ia->ri_memreg_strategy) {
 	case RPCRDMA_FRMR:
 	case RPCRDMA_MTHCAFMR:
-		/*
-		 * Cycle mw's back in reverse order, and "spin" them.
-		 * This delays and scrambles reuse as much as possible.
-		 */
-		i = 1;
-		do {
-			struct rpcrdma_mw **mw;
-			mw = &req->rl_segments[i].mr_chunk.rl_mw;
-			list_add_tail(&(*mw)->mw_list, &buffers->rb_mws);
-			*mw = NULL;
-		} while (++i < RPCRDMA_MAX_SEGS);
-		list_add_tail(&req->rl_segments[0].mr_chunk.rl_mw->mw_list,
-					&buffers->rb_mws);
-		req->rl_segments[0].mr_chunk.rl_mw = NULL;
+		rpcrdma_buffer_put_mrs(req, buffers);
 		break;
 	default:
 		break;
@@ -1388,6 +1617,9 @@
 	 */
 	iov->addr = ib_dma_map_single(ia->ri_id->device,
 			va, len, DMA_BIDIRECTIONAL);
+	if (ib_dma_mapping_error(ia->ri_id->device, iov->addr))
+		return -ENOMEM;
+
 	iov->length = len;
 
 	if (ia->ri_have_dma_lkey) {
@@ -1483,8 +1715,10 @@
 			struct rpcrdma_xprt *r_xprt)
 {
 	struct rpcrdma_mr_seg *seg1 = seg;
-	struct ib_send_wr invalidate_wr, frmr_wr, *bad_wr, *post_wr;
-
+	struct rpcrdma_mw *mw = seg1->mr_chunk.rl_mw;
+	struct rpcrdma_frmr *frmr = &mw->r.frmr;
+	struct ib_mr *mr = frmr->fr_mr;
+	struct ib_send_wr fastreg_wr, *bad_wr;
 	u8 key;
 	int len, pageoff;
 	int i, rc;
@@ -1502,8 +1736,7 @@
 		rpcrdma_map_one(ia, seg, writing);
 		pa = seg->mr_dma;
 		for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) {
-			seg1->mr_chunk.rl_mw->r.frmr.fr_pgl->
-				page_list[page_no++] = pa;
+			frmr->fr_pgl->page_list[page_no++] = pa;
 			pa += PAGE_SIZE;
 		}
 		len += seg->mr_len;
@@ -1515,65 +1748,51 @@
 			break;
 	}
 	dprintk("RPC:       %s: Using frmr %p to map %d segments\n",
-		__func__, seg1->mr_chunk.rl_mw, i);
+		__func__, mw, i);
 
-	if (unlikely(seg1->mr_chunk.rl_mw->r.frmr.state == FRMR_IS_VALID)) {
-		dprintk("RPC:       %s: frmr %x left valid, posting invalidate.\n",
-			__func__,
-			seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey);
-		/* Invalidate before using. */
-		memset(&invalidate_wr, 0, sizeof invalidate_wr);
-		invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw;
-		invalidate_wr.next = &frmr_wr;
-		invalidate_wr.opcode = IB_WR_LOCAL_INV;
-		invalidate_wr.send_flags = IB_SEND_SIGNALED;
-		invalidate_wr.ex.invalidate_rkey =
-			seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey;
-		DECR_CQCOUNT(&r_xprt->rx_ep);
-		post_wr = &invalidate_wr;
-	} else
-		post_wr = &frmr_wr;
+	frmr->fr_state = FRMR_IS_VALID;
 
-	/* Prepare FRMR WR */
-	memset(&frmr_wr, 0, sizeof frmr_wr);
-	frmr_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw;
-	frmr_wr.opcode = IB_WR_FAST_REG_MR;
-	frmr_wr.send_flags = IB_SEND_SIGNALED;
-	frmr_wr.wr.fast_reg.iova_start = seg1->mr_dma;
-	frmr_wr.wr.fast_reg.page_list = seg1->mr_chunk.rl_mw->r.frmr.fr_pgl;
-	frmr_wr.wr.fast_reg.page_list_len = page_no;
-	frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
-	frmr_wr.wr.fast_reg.length = page_no << PAGE_SHIFT;
-	if (frmr_wr.wr.fast_reg.length < len) {
-		while (seg1->mr_nsegs--)
-			rpcrdma_unmap_one(ia, seg++);
-		return -EIO;
+	memset(&fastreg_wr, 0, sizeof(fastreg_wr));
+	fastreg_wr.wr_id = (unsigned long)(void *)mw;
+	fastreg_wr.opcode = IB_WR_FAST_REG_MR;
+	fastreg_wr.wr.fast_reg.iova_start = seg1->mr_dma;
+	fastreg_wr.wr.fast_reg.page_list = frmr->fr_pgl;
+	fastreg_wr.wr.fast_reg.page_list_len = page_no;
+	fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
+	fastreg_wr.wr.fast_reg.length = page_no << PAGE_SHIFT;
+	if (fastreg_wr.wr.fast_reg.length < len) {
+		rc = -EIO;
+		goto out_err;
 	}
 
 	/* Bump the key */
-	key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF);
-	ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key);
+	key = (u8)(mr->rkey & 0x000000FF);
+	ib_update_fast_reg_key(mr, ++key);
 
-	frmr_wr.wr.fast_reg.access_flags = (writing ?
+	fastreg_wr.wr.fast_reg.access_flags = (writing ?
 				IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :
 				IB_ACCESS_REMOTE_READ);
-	frmr_wr.wr.fast_reg.rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey;
+	fastreg_wr.wr.fast_reg.rkey = mr->rkey;
 	DECR_CQCOUNT(&r_xprt->rx_ep);
 
-	rc = ib_post_send(ia->ri_id->qp, post_wr, &bad_wr);
-
+	rc = ib_post_send(ia->ri_id->qp, &fastreg_wr, &bad_wr);
 	if (rc) {
 		dprintk("RPC:       %s: failed ib_post_send for register,"
 			" status %i\n", __func__, rc);
-		while (i--)
-			rpcrdma_unmap_one(ia, --seg);
+		ib_update_fast_reg_key(mr, --key);
+		goto out_err;
 	} else {
-		seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey;
+		seg1->mr_rkey = mr->rkey;
 		seg1->mr_base = seg1->mr_dma + pageoff;
 		seg1->mr_nsegs = i;
 		seg1->mr_len = len;
 	}
 	*nsegs = i;
+	return 0;
+out_err:
+	frmr->fr_state = FRMR_IS_INVALID;
+	while (i--)
+		rpcrdma_unmap_one(ia, --seg);
 	return rc;
 }
 
@@ -1585,20 +1804,25 @@
 	struct ib_send_wr invalidate_wr, *bad_wr;
 	int rc;
 
-	while (seg1->mr_nsegs--)
-		rpcrdma_unmap_one(ia, seg++);
+	seg1->mr_chunk.rl_mw->r.frmr.fr_state = FRMR_IS_INVALID;
 
 	memset(&invalidate_wr, 0, sizeof invalidate_wr);
 	invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw;
 	invalidate_wr.opcode = IB_WR_LOCAL_INV;
-	invalidate_wr.send_flags = IB_SEND_SIGNALED;
 	invalidate_wr.ex.invalidate_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey;
 	DECR_CQCOUNT(&r_xprt->rx_ep);
 
+	read_lock(&ia->ri_qplock);
+	while (seg1->mr_nsegs--)
+		rpcrdma_unmap_one(ia, seg++);
 	rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr);
-	if (rc)
+	read_unlock(&ia->ri_qplock);
+	if (rc) {
+		/* Force rpcrdma_buffer_get() to retry */
+		seg1->mr_chunk.rl_mw->r.frmr.fr_state = FRMR_IS_STALE;
 		dprintk("RPC:       %s: failed ib_post_send for invalidate,"
 			" status %i\n", __func__, rc);
+	}
 	return rc;
 }
 
@@ -1656,8 +1880,10 @@
 
 	list_add(&seg1->mr_chunk.rl_mw->r.fmr->list, &l);
 	rc = ib_unmap_fmr(&l);
+	read_lock(&ia->ri_qplock);
 	while (seg1->mr_nsegs--)
 		rpcrdma_unmap_one(ia, seg++);
+	read_unlock(&ia->ri_qplock);
 	if (rc)
 		dprintk("RPC:       %s: failed ib_unmap_fmr,"
 			" status %i\n", __func__, rc);
@@ -1673,7 +1899,6 @@
 
 	switch (ia->ri_memreg_strategy) {
 
-#if RPCRDMA_PERSISTENT_REGISTRATION
 	case RPCRDMA_ALLPHYSICAL:
 		rpcrdma_map_one(ia, seg, writing);
 		seg->mr_rkey = ia->ri_bind_mem->rkey;
@@ -1681,7 +1906,6 @@
 		seg->mr_nsegs = 1;
 		nsegs = 1;
 		break;
-#endif
 
 	/* Registration using frmr registration */
 	case RPCRDMA_FRMR:
@@ -1711,11 +1935,11 @@
 
 	switch (ia->ri_memreg_strategy) {
 
-#if RPCRDMA_PERSISTENT_REGISTRATION
 	case RPCRDMA_ALLPHYSICAL:
+		read_lock(&ia->ri_qplock);
 		rpcrdma_unmap_one(ia, seg);
+		read_unlock(&ia->ri_qplock);
 		break;
-#endif
 
 	case RPCRDMA_FRMR:
 		rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt);
@@ -1809,3 +2033,44 @@
 			rc);
 	return rc;
 }
+
+/* Physical mapping means one Read/Write list entry per-page.
+ * All list entries must fit within an inline buffer
+ *
+ * NB: The server must return a Write list for NFS READ,
+ *     which has the same constraint. Factor in the inline
+ *     rsize as well.
+ */
+static size_t
+rpcrdma_physical_max_payload(struct rpcrdma_xprt *r_xprt)
+{
+	struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data;
+	unsigned int inline_size, pages;
+
+	inline_size = min_t(unsigned int,
+			    cdata->inline_wsize, cdata->inline_rsize);
+	inline_size -= RPCRDMA_HDRLEN_MIN;
+	pages = inline_size / sizeof(struct rpcrdma_segment);
+	return pages << PAGE_SHIFT;
+}
+
+static size_t
+rpcrdma_mr_max_payload(struct rpcrdma_xprt *r_xprt)
+{
+	return RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT;
+}
+
+size_t
+rpcrdma_max_payload(struct rpcrdma_xprt *r_xprt)
+{
+	size_t result;
+
+	switch (r_xprt->rx_ia.ri_memreg_strategy) {
+	case RPCRDMA_ALLPHYSICAL:
+		result = rpcrdma_physical_max_payload(r_xprt);
+		break;
+	default:
+		result = rpcrdma_mr_max_payload(r_xprt);
+	}
+	return result;
+}
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 89e7cd4..c419498 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -59,6 +59,7 @@
  * Interface Adapter -- one per transport instance
  */
 struct rpcrdma_ia {
+	rwlock_t		ri_qplock;
 	struct rdma_cm_id 	*ri_id;
 	struct ib_pd		*ri_pd;
 	struct ib_mr		*ri_bind_mem;
@@ -98,6 +99,14 @@
 #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit)
 #define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount)
 
+enum rpcrdma_chunktype {
+	rpcrdma_noch = 0,
+	rpcrdma_readch,
+	rpcrdma_areadch,
+	rpcrdma_writech,
+	rpcrdma_replych
+};
+
 /*
  * struct rpcrdma_rep -- this structure encapsulates state required to recv
  * and complete a reply, asychronously. It needs several pieces of
@@ -137,6 +146,40 @@
 };
 
 /*
+ * struct rpcrdma_mw - external memory region metadata
+ *
+ * An external memory region is any buffer or page that is registered
+ * on the fly (ie, not pre-registered).
+ *
+ * Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
+ * call_allocate, rpcrdma_buffer_get() assigns one to each segment in
+ * an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
+ * track of registration metadata while each RPC is pending.
+ * rpcrdma_deregister_external() uses this metadata to unmap and
+ * release these resources when an RPC is complete.
+ */
+enum rpcrdma_frmr_state {
+	FRMR_IS_INVALID,	/* ready to be used */
+	FRMR_IS_VALID,		/* in use */
+	FRMR_IS_STALE,		/* failed completion */
+};
+
+struct rpcrdma_frmr {
+	struct ib_fast_reg_page_list	*fr_pgl;
+	struct ib_mr			*fr_mr;
+	enum rpcrdma_frmr_state		fr_state;
+};
+
+struct rpcrdma_mw {
+	union {
+		struct ib_fmr		*fmr;
+		struct rpcrdma_frmr	frmr;
+	} r;
+	struct list_head	mw_list;
+	struct list_head	mw_all;
+};
+
+/*
  * struct rpcrdma_req -- structure central to the request/reply sequence.
  *
  * N of these are associated with a transport instance, and stored in
@@ -163,17 +206,7 @@
 struct rpcrdma_mr_seg {		/* chunk descriptors */
 	union {				/* chunk memory handles */
 		struct ib_mr	*rl_mr;		/* if registered directly */
-		struct rpcrdma_mw {		/* if registered from region */
-			union {
-				struct ib_fmr	*fmr;
-				struct {
-					struct ib_fast_reg_page_list *fr_pgl;
-					struct ib_mr *fr_mr;
-					enum { FRMR_IS_INVALID, FRMR_IS_VALID  } state;
-				} frmr;
-			} r;
-			struct list_head mw_list;
-		} *rl_mw;
+		struct rpcrdma_mw *rl_mw;	/* if registered from region */
 	} mr_chunk;
 	u64		mr_base;	/* registration result */
 	u32		mr_rkey;	/* registration result */
@@ -191,6 +224,7 @@
 	unsigned int	rl_niovs;	/* 0, 2 or 4 */
 	unsigned int	rl_nchunks;	/* non-zero if chunks */
 	unsigned int	rl_connect_cookie;	/* retry detection */
+	enum rpcrdma_chunktype	rl_rtype, rl_wtype;
 	struct rpcrdma_buffer *rl_buffer; /* home base for this structure */
 	struct rpcrdma_rep	*rl_reply;/* holder for reply buffer */
 	struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS];/* chunk segments */
@@ -214,6 +248,7 @@
 	atomic_t	rb_credits;	/* most recent server credits */
 	int		rb_max_requests;/* client max requests */
 	struct list_head rb_mws;	/* optional memory windows/fmrs/frmrs */
+	struct list_head rb_all;
 	int		rb_send_index;
 	struct rpcrdma_req	**rb_send_bufs;
 	int		rb_recv_index;
@@ -306,7 +341,7 @@
 				struct rpcrdma_create_data_internal *);
 void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *);
 int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *);
-int rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *);
+void rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *);
 
 int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *,
 				struct rpcrdma_req *);
@@ -346,7 +381,9 @@
 /*
  * RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c
  */
+ssize_t rpcrdma_marshal_chunks(struct rpc_rqst *, ssize_t);
 int rpcrdma_marshal_req(struct rpc_rqst *);
+size_t rpcrdma_max_payload(struct rpcrdma_xprt *);
 
 /* Temporary NFS request map cache. Created in svc_rdma.c  */
 extern struct kmem_cache *svc_rdma_map_cachep;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index be8bbd5..43cd89e 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -594,6 +594,7 @@
 	}
 
 	switch (status) {
+	case -ENOBUFS:
 	case -EAGAIN:
 		status = xs_nospace(task);
 		break;
@@ -661,6 +662,7 @@
 		dprintk("RPC:       sendmsg returned unrecognized error %d\n",
 			-status);
 	case -ENETUNREACH:
+	case -ENOBUFS:
 	case -EPIPE:
 	case -ECONNREFUSED:
 		/* When the server has died, an ICMP port unreachable message
@@ -758,6 +760,7 @@
 		status = -ENOTCONN;
 		/* Should we call xs_close() here? */
 		break;
+	case -ENOBUFS:
 	case -EAGAIN:
 		status = xs_nospace(task);
 		break;
@@ -1946,6 +1949,7 @@
 		dprintk("RPC:       xprt %p connected to %s\n",
 				xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
 		xprt_set_connected(xprt);
+	case -ENOBUFS:
 		break;
 	case -ENOENT:
 		dprintk("RPC:       xprt %p: socket %s does not exist\n",
@@ -2281,6 +2285,7 @@
 	case -ECONNREFUSED:
 	case -ECONNRESET:
 	case -ENETUNREACH:
+	case -ENOBUFS:
 		/* retry with existing socket, after a delay */
 		goto out;
 	}
@@ -3054,12 +3059,12 @@
 		const struct kernel_param *kp,
 		unsigned int min, unsigned int max)
 {
-	unsigned long num;
+	unsigned int num;
 	int ret;
 
 	if (!val)
 		return -EINVAL;
-	ret = strict_strtoul(val, 0, &num);
+	ret = kstrtouint(val, 0, &num);
 	if (ret == -EINVAL || num < min || num > max)
 		return -EINVAL;
 	*((unsigned int *)kp->arg) = num;
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 122f95c..8a9a4e1 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -215,11 +215,13 @@
 arg-check = $(if $(strip $(cmd_$@)),,1)
 endif
 
-# >'< substitution is for echo to work,
-# >$< substitution to preserve $ when reloading .cmd file
-# note: when using inline perl scripts [perl -e '...$$t=1;...']
-# in $(cmd_xxx) double $$ your perl vars
-make-cmd = $(subst \\,\\\\,$(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))))
+# Replace >$< with >$$< to preserve $ when reloading the .cmd file
+# (needed for make)
+# Replace >#< with >\#< to avoid starting a comment in the .cmd file
+# (needed for make)
+# Replace >'< with >'\''< to be able to enclose the whole string in '...'
+# (needed for the shell)
+make-cmd = $(call escsq,$(subst \#,\\\#,$(subst $$,$$$$,$(cmd_$(1)))))
 
 # Find any prerequisites that is newer than target or that does not exist.
 # PHONY targets skipped in both cases.
@@ -230,7 +232,7 @@
 if_changed = $(if $(strip $(any-prereq) $(arg-check)),                       \
 	@set -e;                                                             \
 	$(echo-cmd) $(cmd_$(1));                                             \
-	echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
+	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
 
 # Execute the command and also postprocess generated .d dependencies file.
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ),                  \
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 686cb0d..a651cee 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -40,8 +40,8 @@
 # build a list of files to remove, usually relative to the current
 # directory
 
-__clean-files	:= $(extra-y) $(always)                  \
-		   $(targets) $(clean-files)             \
+__clean-files	:= $(extra-y) $(extra-m) $(extra-)       \
+		   $(always) $(targets) $(clean-files)   \
 		   $(host-progs)                         \
 		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-)
 
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 6564350..f734033 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -26,16 +26,6 @@
 warning-1 += $(call cc-option, -Wunused-but-set-variable)
 warning-1 += $(call cc-disable-warning, missing-field-initializers)
 
-# Clang
-warning-1 += $(call cc-disable-warning, initializer-overrides)
-warning-1 += $(call cc-disable-warning, unused-value)
-warning-1 += $(call cc-disable-warning, format)
-warning-1 += $(call cc-disable-warning, unknown-warning-option)
-warning-1 += $(call cc-disable-warning, sign-compare)
-warning-1 += $(call cc-disable-warning, format-zero-length)
-warning-1 += $(call cc-disable-warning, uninitialized)
-warning-1 += $(call cc-option, -fcatch-undefined-behavior)
-
 warning-2 := -Waggregate-return
 warning-2 += -Wcast-align
 warning-2 += -Wdisabled-optimization
@@ -64,4 +54,15 @@
 endif
 
 KBUILD_CFLAGS += $(warning)
+else
+
+ifeq ($(COMPILER),clang)
+KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)
+KBUILD_CFLAGS += $(call cc-disable-warning, format)
+KBUILD_CFLAGS += $(call cc-disable-warning, unknown-warning-option)
+KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)
+KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)
+KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)
+endif
 endif
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 6689364..ab5980f 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -20,21 +20,12 @@
 # Will compile qconf as a C++ program, and menu as a C program.
 # They are linked as C++ code to the executable qconf
 
-# hostprogs-y := conf
-# conf-objs  := conf.o libkconfig.so
-# libkconfig-objs := expr.o type.o
-# Will create a shared library named libkconfig.so that consists of
-# expr.o and type.o (they are both compiled as C code and the object files
-# are made as position independent code).
-# conf.c is compiled as a C program, and conf.o is linked together with
-# libkconfig.so as the executable conf.
-# Note: Shared libraries consisting of C++ files are not supported
-
 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
 
 # C code
 # Executables compiled from a single .c file
-host-csingle	:= $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
+host-csingle	:= $(foreach m,$(__hostprogs), \
+			$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
 
 # C executables linked based on several .o files
 host-cmulti	:= $(foreach m,$(__hostprogs),\
@@ -44,33 +35,17 @@
 host-cobjs	:= $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
 
 # C++ code
-# C++ executables compiled from at least on .cc file
+# C++ executables compiled from at least one .cc file
 # and zero or more .c files
 host-cxxmulti	:= $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
 
 # C++ Object (.o) files compiled from .cc files
 host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
 
-# Shared libaries (only .c supported)
-# Shared libraries (.so) - all .so files referenced in "xxx-objs"
-host-cshlib	:= $(sort $(filter %.so, $(host-cobjs)))
-# Remove .so files from "xxx-objs"
-host-cobjs	:= $(filter-out %.so,$(host-cobjs))
-
-#Object (.o) files used by the shared libaries
-host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
-
 # output directory for programs/.o files
-# hostprogs-y := tools/build may have been specified. Retrieve directory
-host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
-# directory of .o files from prog-objs notation
-host-objdirs += $(foreach f,$(host-cmulti),                  \
-                    $(foreach m,$($(f)-objs),                \
-                        $(if $(dir $(m)),$(dir $(m)))))
-# directory of .o files from prog-cxxobjs notation
-host-objdirs += $(foreach f,$(host-cxxmulti),                  \
-                    $(foreach m,$($(f)-cxxobjs),                \
-                        $(if $(dir $(m)),$(dir $(m)))))
+# hostprogs-y := tools/build may have been specified.
+# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
+host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
 
 host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
 
@@ -81,8 +56,6 @@
 host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
 host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
 host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
-host-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
-host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
 host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
 
 obj-dirs += $(host-objdirs)
@@ -123,7 +96,7 @@
       cmd_host-cmulti	= $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
 			  $(addprefix $(obj)/,$($(@F)-objs)) \
 			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
-$(host-cmulti): $(obj)/%: $(host-cobjs) $(host-cshlib) FORCE
+$(host-cmulti): $(obj)/%: $(host-cobjs) FORCE
 	$(call if_changed,host-cmulti)
 
 # Create .o file from a single .c file
@@ -140,7 +113,7 @@
 			  $(foreach o,objs cxxobjs,\
 			  $(addprefix $(obj)/,$($(@F)-$(o)))) \
 			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
-$(host-cxxmulti): $(obj)/%: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
+$(host-cxxmulti): $(obj)/%: $(host-cobjs) $(host-cxxobjs) FORCE
 	$(call if_changed,host-cxxmulti)
 
 # Create .o file from a single .cc (C++) file
@@ -149,21 +122,5 @@
 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 	$(call if_changed_dep,host-cxxobjs)
 
-# Compile .c file, create position independent .o file
-# host-cshobjs -> .o
-quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
-      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
-$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
-	$(call if_changed_dep,host-cshobjs)
-
-# Link a shared library, based on position independent .o files
-# *.o -> .so shared library (host-cshlib)
-quiet_cmd_host-cshlib	= HOSTLLD -shared $@
-      cmd_host-cshlib	= $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
-			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
-			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
-$(host-cshlib): $(obj)/%: $(host-cshobjs) FORCE
-	$(call if_changed,host-cshlib)
-
 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
-	   $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)
+	   $(host-cxxmulti) $(host-cxxobjs)
diff --git a/scripts/coccinelle/api/alloc/alloc_cast.cocci b/scripts/coccinelle/api/alloc/alloc_cast.cocci
new file mode 100644
index 0000000..6c308ee
--- /dev/null
+++ b/scripts/coccinelle/api/alloc/alloc_cast.cocci
@@ -0,0 +1,72 @@
+/// Remove casting the values returned by memory allocation functions
+/// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc.
+///
+//# This makes an effort to find cases of casting of values returned by
+//# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
+//# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
+//# the casting as it is not required. The result in the patch case may
+//#need some reformatting.
+//
+// Confidence: High
+// Copyright: 2014, Himangi Saraogi  GPLv2.
+// Comments:
+// Options: --no-includes --include-headers
+//
+
+virtual context
+virtual patch
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on context@
+type T;
+@@
+
+* (T *)
+  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch@
+type T;
+@@
+
+- (T *)
+  (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...))
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r depends on org || report@
+type T;
+position p;
+@@
+
+ (T@p *)\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
+
+@script:python depends on org@
+p << r.p;
+t << r.T;
+@@
+
+coccilib.org.print_safe_todo(p[0], t)
+
+@script:python depends on report@
+p << r.p;
+t << r.T;
+@@
+
+msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t)
+coccilib.report.print_report(p[0], msg)
+
+
diff --git a/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci b/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci
deleted file mode 100644
index bd5d08b..0000000
--- a/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci
+++ /dev/null
@@ -1,67 +0,0 @@
-///
-/// Casting (void *) value returned by kmalloc is useless
-/// as mentioned in Documentation/CodingStyle, Chap 14.
-///
-// Confidence: High
-// Copyright: 2009,2010 Nicolas Palix, DIKU.  GPLv2.
-// URL: http://coccinelle.lip6.fr/
-// Options: --no-includes --include-headers
-//
-// Keywords: kmalloc, kzalloc, kcalloc
-// Version min: < 2.6.12 kmalloc
-// Version min: < 2.6.12 kcalloc
-// Version min:   2.6.14 kzalloc
-//
-
-virtual context
-virtual patch
-virtual org
-virtual report
-
-//----------------------------------------------------------
-//  For context mode
-//----------------------------------------------------------
-
-@depends on context@
-type T;
-@@
-
-* (T *)
-  \(kmalloc\|kzalloc\|kcalloc\)(...)
-
-//----------------------------------------------------------
-//  For patch mode
-//----------------------------------------------------------
-
-@depends on patch@
-type T;
-@@
-
-- (T *)
-  \(kmalloc\|kzalloc\|kcalloc\)(...)
-
-//----------------------------------------------------------
-//  For org and report mode
-//----------------------------------------------------------
-
-@r depends on org || report@
-type T;
-position p;
-@@
-
- (T@p *)\(kmalloc\|kzalloc\|kcalloc\)(...)
-
-@script:python depends on org@
-p << r.p;
-t << r.T;
-@@
-
-coccilib.org.print_safe_todo(p[0], t)
-
-@script:python depends on report@
-p << r.p;
-t << r.T;
-@@
-
-msg="WARNING: casting value returned by k[cmz]alloc to (%s *) is useless." % (t)
-coccilib.report.print_report(p[0], msg)
diff --git a/scripts/coccinelle/misc/array_size.cocci b/scripts/coccinelle/misc/array_size.cocci
new file mode 100644
index 0000000..81e279c
--- /dev/null
+++ b/scripts/coccinelle/misc/array_size.cocci
@@ -0,0 +1,87 @@
+/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
+///
+//# This makes an effort to find cases where ARRAY_SIZE can be used such as
+//# where there is a division of sizeof the array by the sizeof its first
+//# element or by any indexed element or the element type. It replaces the
+//# division of the two sizeofs by ARRAY_SIZE.
+//
+// Confidence: High
+// Copyright: (C) 2014 Himangi Saraogi.  GPLv2.
+// Comments:
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@i@
+@@
+
+#include <linux/kernel.h>
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on i&&context@
+type T;
+T[] E;
+@@
+(
+* (sizeof(E)/sizeof(*E))
+|
+* (sizeof(E)/sizeof(E[...]))
+|
+* (sizeof(E)/sizeof(T))
+)
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on i&&patch@
+type T;
+T[] E;
+@@
+(
+- (sizeof(E)/sizeof(*E))
++ ARRAY_SIZE(E)
+|
+- (sizeof(E)/sizeof(E[...]))
++ ARRAY_SIZE(E)
+|
+- (sizeof(E)/sizeof(T))
++ ARRAY_SIZE(E)
+)
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r@
+type T;
+T[] E;
+position p;
+@@
+(
+ (sizeof(E)@p /sizeof(*E))
+|
+ (sizeof(E)@p /sizeof(E[...]))
+|
+ (sizeof(E)@p /sizeof(T))
+)
+
+@script:python depends on i&&org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING should use ARRAY_SIZE")
+
+@script:python depends on i&&report@
+p << r.p;
+@@
+
+msg="WARNING: Use ARRAY_SIZE"
+coccilib.report.print_report(p[0], msg)
+
diff --git a/scripts/coccinelle/misc/badty.cocci b/scripts/coccinelle/misc/badty.cocci
new file mode 100644
index 0000000..2fc06fc
--- /dev/null
+++ b/scripts/coccinelle/misc/badty.cocci
@@ -0,0 +1,76 @@
+/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
+///
+//# This makes an effort to find cases where the argument to sizeof is wrong
+//# in memory allocation functions by checking the type of the allocated memory
+//# when it is a double pointer and ensuring the sizeof argument takes a pointer
+//# to the the memory being allocated. There are false positives in cases the
+//# sizeof argument is not used in constructing the return value. The result
+//# may need some reformatting.
+//
+// Confidence: Moderate
+// Copyright: (C) 2014 Himangi Saraogi.  GPLv2.
+// Comments:
+// Options:
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on context disable sizeof_type_expr@
+type T;
+T **x;
+@@
+
+  x =
+  <+...sizeof(
+* T
+  )...+>
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch disable sizeof_type_expr@
+type T;
+T **x;
+@@
+
+  x =
+  <+...sizeof(
+- T
++ *x
+  )...+>
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r disable sizeof_type_expr@
+type T;
+T **x;
+position p;
+@@
+
+  x =
+  <+...sizeof(
+  T@p
+  )...+>
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING sizeof argument should be pointer type, not structure type")
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg="WARNING: Use correct pointer type argument for sizeof"
+coccilib.report.print_report(p[0], msg)
+
diff --git a/scripts/coccinelle/misc/bugon.cocci b/scripts/coccinelle/misc/bugon.cocci
new file mode 100644
index 0000000..556456c
--- /dev/null
+++ b/scripts/coccinelle/misc/bugon.cocci
@@ -0,0 +1,62 @@
+/// Use BUG_ON instead of a if condition followed by BUG.
+///
+//# This makes an effort to find cases where BUG() follows an if
+//# condition on an expression and replaces the if condition and BUG()
+//# with a BUG_ON having the conditional expression of the if statement
+//# as argument.
+//
+// Confidence: High
+// Copyright: (C) 2014 Himangi Saraogi.  GPLv2.
+// Comments:
+// Options: --no-includes, --include-headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on context@
+expression e;
+@@
+
+*if (e) BUG();
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch@
+expression e;
+@@
+
+-if (e) BUG();
++BUG_ON(e);
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r@
+expression e;
+position p;
+@@
+
+ if (e) BUG@p ();
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING use BUG_ON")
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg="WARNING: Use BUG_ON"
+coccilib.report.print_report(p[0], msg)
+
diff --git a/scripts/coccinelle/null/badzero.cocci b/scripts/coccinelle/null/badzero.cocci
index d79baf7..5551da2 100644
--- a/scripts/coccinelle/null/badzero.cocci
+++ b/scripts/coccinelle/null/badzero.cocci
@@ -10,7 +10,7 @@
 // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
 // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
 // URL: http://coccinelle.lip6.fr/
-// Comments:
+// Comments: Requires Coccinelle version 1.0.0-rc20 or later
 // Options:
 
 virtual patch
@@ -19,6 +19,7 @@
 virtual report
 
 @initialize:ocaml@
+@@
 let negtable = Hashtbl.create 101
 
 @depends on patch@
diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c
index 7a43c0c..8a431bc 100644
--- a/sound/ppc/pmac.c
+++ b/sound/ppc/pmac.c
@@ -992,9 +992,9 @@
 		return -ENODEV;
 
 	if (!sound) {
-		sound = of_find_node_by_name(NULL, "sound");
-		while (sound && sound->parent != chip->node)
-			sound = of_find_node_by_name(sound, "sound");
+		for_each_node_by_name(sound, "sound")
+			if (sound->parent == chip->node)
+				break;
 	}
 	if (! sound) {
 		of_node_put(chip->node);