diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index fcbcf9a..40793be 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -37,7 +37,7 @@ int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
 			      long mod_index, long addr_index);
 int pdc_model_info(struct pdc_model *model);
-int pdc_model_sysmodel(char *name);
+int pdc_model_sysmodel(unsigned int os_id, char *name);
 int pdc_model_cpuid(unsigned long *cpu_id);
 int pdc_model_versions(unsigned long *versions, int id);
 int pdc_model_capabilities(unsigned long *capabilities);
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index bd09a44..ea35743 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -151,8 +151,8 @@ extern void __update_cache(pte_t pte);
 
 /* This calculates the number of initial pages we need for the initial
  * page tables */
-#if (KERNEL_INITIAL_ORDER) >= (PMD_SHIFT)
-# define PT_INITIAL	(1 << (KERNEL_INITIAL_ORDER - PMD_SHIFT))
+#if (KERNEL_INITIAL_ORDER) >= (PLD_SHIFT + BITS_PER_PTE)
+# define PT_INITIAL	(1 << (KERNEL_INITIAL_ORDER - PLD_SHIFT - BITS_PER_PTE))
 #else
 # define PT_INITIAL	(1)  /* all initial PTEs fit into one page */
 #endif
diff --git a/arch/parisc/include/uapi/asm/mman.h b/arch/parisc/include/uapi/asm/mman.h
index 22133a6..68c44f9 100644
--- a/arch/parisc/include/uapi/asm/mman.h
+++ b/arch/parisc/include/uapi/asm/mman.h
@@ -49,6 +49,19 @@
 #define MADV_DONTFORK	10		/* don't inherit across fork */
 #define MADV_DOFORK	11		/* do inherit across fork */
 
+#define MADV_MERGEABLE   12		/* KSM may merge identical pages */
+#define MADV_UNMERGEABLE 13		/* KSM may not merge identical pages */
+
+#define MADV_HUGEPAGE	14		/* Worth backing with hugepages */
+#define MADV_NOHUGEPAGE 15		/* Not worth backing with hugepages */
+
+#define MADV_DONTDUMP   16		/* Explicity exclude from the core dump,
+					   overrides the coredump filter bits */
+#define MADV_DODUMP	17		/* Clear the MADV_NODUMP flag */
+
+#define MADV_WIPEONFORK 18		/* Zero memory on fork, child only */
+#define MADV_KEEPONFORK 19		/* Undo MADV_WIPEONFORK */
+
 #define MADV_COLD	20		/* deactivate these pages */
 #define MADV_PAGEOUT	21		/* reclaim these pages */
 
@@ -57,27 +70,13 @@
 
 #define MADV_DONTNEED_LOCKED	24	/* like DONTNEED, but drop locked pages too */
 
-#define MADV_MERGEABLE   65		/* KSM may merge identical pages */
-#define MADV_UNMERGEABLE 66		/* KSM may not merge identical pages */
-
-#define MADV_HUGEPAGE	67		/* Worth backing with hugepages */
-#define MADV_NOHUGEPAGE	68		/* Not worth backing with hugepages */
-
-#define MADV_DONTDUMP   69		/* Explicity exclude from the core dump,
-					   overrides the coredump filter bits */
-#define MADV_DODUMP	70		/* Clear the MADV_NODUMP flag */
-
-#define MADV_WIPEONFORK 71		/* Zero memory on fork, child only */
-#define MADV_KEEPONFORK 72		/* Undo MADV_WIPEONFORK */
-
-#define MADV_COLLAPSE	73		/* Synchronous hugepage collapse */
+#define MADV_COLLAPSE	25		/* Synchronous hugepage collapse */
 
 #define MADV_HWPOISON     100		/* poison a page for testing */
 #define MADV_SOFT_OFFLINE 101		/* soft offline page for testing */
 
 /* compatibility flags */
 #define MAP_FILE	0
-#define MAP_VARIABLE	0
 
 #define PKEY_DISABLE_ACCESS	0x1
 #define PKEY_DISABLE_WRITE	0x2
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 6a7e315..4dfe1f4 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -74,8 +74,8 @@
 static DEFINE_SPINLOCK(pdc_lock);
 #endif
 
-extern unsigned long pdc_result[NUM_PDC_RESULT];
-extern unsigned long pdc_result2[NUM_PDC_RESULT];
+unsigned long pdc_result[NUM_PDC_RESULT]  __aligned(8);
+unsigned long pdc_result2[NUM_PDC_RESULT] __aligned(8);
 
 #ifdef CONFIG_64BIT
 #define WIDE_FIRMWARE 0x1
@@ -527,14 +527,14 @@ int pdc_model_info(struct pdc_model *model)
  * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
  * on HP/UX.
  */
-int pdc_model_sysmodel(char *name)
+int pdc_model_sysmodel(unsigned int os_id, char *name)
 {
         int retval;
 	unsigned long flags;
 
         spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
-                              OS_ID_HPUX, __pa(name));
+                              os_id, __pa(name));
         convert_to_wide(pdc_result);
 
         if (retval == PDC_OK) {
@@ -1288,9 +1288,8 @@ void pdc_io_reset_devices(void)
 
 #endif /* defined(BOOTLOADER) */
 
-/* locked by pdc_console_lock */
-static int __attribute__((aligned(8)))   iodc_retbuf[32];
-static char __attribute__((aligned(64))) iodc_dbuf[4096];
+/* locked by pdc_lock */
+static char iodc_dbuf[4096] __page_aligned_bss;
 
 /**
  * pdc_iodc_print - Console print using IODC.
@@ -1307,6 +1306,9 @@ int pdc_iodc_print(const unsigned char *str, unsigned count)
 	unsigned int i;
 	unsigned long flags;
 
+	count = min_t(unsigned int, count, sizeof(iodc_dbuf));
+
+	spin_lock_irqsave(&pdc_lock, flags);
 	for (i = 0; i < count;) {
 		switch(str[i]) {
 		case '\n':
@@ -1322,12 +1324,11 @@ int pdc_iodc_print(const unsigned char *str, unsigned count)
 	}
 
 print:
-        spin_lock_irqsave(&pdc_lock, flags);
-        real32_call(PAGE0->mem_cons.iodc_io,
-                    (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
-                    PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
-                    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
-        spin_unlock_irqrestore(&pdc_lock, flags);
+	real32_call(PAGE0->mem_cons.iodc_io,
+		(unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
+		PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
+		__pa(pdc_result), 0, __pa(iodc_dbuf), i, 0);
+	spin_unlock_irqrestore(&pdc_lock, flags);
 
 	return i;
 }
@@ -1354,10 +1355,11 @@ int pdc_iodc_getc(void)
 	real32_call(PAGE0->mem_kbd.iodc_io,
 		    (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
 		    PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 
-		    __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
+		    __pa(pdc_result), 0, __pa(iodc_dbuf), 1, 0);
 
 	ch = *iodc_dbuf;
-	status = *iodc_retbuf;
+	/* like convert_to_wide() but for first return value only: */
+	status = *(int *)&pdc_result;
 	spin_unlock_irqrestore(&pdc_lock, flags);
 
 	if (status == 0)
diff --git a/arch/parisc/kernel/kgdb.c b/arch/parisc/kernel/kgdb.c
index ab7620f..b16fa9b 100644
--- a/arch/parisc/kernel/kgdb.c
+++ b/arch/parisc/kernel/kgdb.c
@@ -208,23 +208,3 @@ int kgdb_arch_handle_exception(int trap, int signo,
 	}
 	return -1;
 }
-
-/* KGDB console driver which uses PDC to read chars from keyboard */
-
-static void kgdb_pdc_write_char(u8 chr)
-{
-	/* no need to print char. kgdb will do it. */
-}
-
-static struct kgdb_io kgdb_pdc_io_ops = {
-	.name		= "kgdb_pdc",
-	.read_char	= pdc_iodc_getc,
-	.write_char	= kgdb_pdc_write_char,
-};
-
-static int __init kgdb_pdc_init(void)
-{
-	kgdb_register_io_module(&kgdb_pdc_io_ops);
-	return 0;
-}
-early_initcall(kgdb_pdc_init);
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 7d0989f..cf3bf82 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -12,37 +12,27 @@
 #include <asm/page.h>		/* for PAGE0 */
 #include <asm/pdc.h>		/* for iodc_call() proto and friends */
 
-static DEFINE_SPINLOCK(pdc_console_lock);
-
 static void pdc_console_write(struct console *co, const char *s, unsigned count)
 {
 	int i = 0;
-	unsigned long flags;
 
-	spin_lock_irqsave(&pdc_console_lock, flags);
 	do {
 		i += pdc_iodc_print(s + i, count - i);
 	} while (i < count);
-	spin_unlock_irqrestore(&pdc_console_lock, flags);
 }
 
 #ifdef CONFIG_KGDB
 static int kgdb_pdc_read_char(void)
 {
-	int c;
-	unsigned long flags;
-
-	spin_lock_irqsave(&pdc_console_lock, flags);
-	c = pdc_iodc_getc();
-	spin_unlock_irqrestore(&pdc_console_lock, flags);
+	int c = pdc_iodc_getc();
 
 	return (c <= 0) ? NO_POLL_CHAR : c;
 }
 
 static void kgdb_pdc_write_char(u8 chr)
 {
-	if (PAGE0->mem_cons.cl_class != CL_DUPLEX)
-		pdc_console_write(NULL, &chr, 1);
+	/* no need to print char as it's shown on standard console */
+	/* pdc_iodc_print(&chr, 1); */
 }
 
 static struct kgdb_io kgdb_pdc_io_ops = {
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index dddaaa6..ba07e76 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -272,10 +272,15 @@ void __init collect_boot_cpu_data(void)
 		printk(KERN_INFO "capabilities 0x%lx\n",
 			boot_cpu_data.pdc.capabilities);
 
-	if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
-		printk(KERN_INFO "model %s\n",
+	if (pdc_model_sysmodel(OS_ID_HPUX, boot_cpu_data.pdc.sys_model_name) == PDC_OK)
+		pr_info("HP-UX model name: %s\n",
 			boot_cpu_data.pdc.sys_model_name);
 
+	serial_no[0] = 0;
+	if (pdc_model_sysmodel(OS_ID_MPEXL, serial_no) == PDC_OK &&
+		serial_no[0])
+		pr_info("MPE/iX model name: %s\n", serial_no);
+
 	dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name);
 
 	boot_cpu_data.hversion =  boot_cpu_data.pdc.model.hversion;
diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S
index 2b16d8d..4dc12c4 100644
--- a/arch/parisc/kernel/real2.S
+++ b/arch/parisc/kernel/real2.S
@@ -15,28 +15,15 @@
 
 #include <linux/linkage.h>
 
-
-	.section	.bss
-
-	.export pdc_result
-	.export pdc_result2
-	.align 8
-pdc_result:
-	.block	ASM_PDC_RESULT_SIZE
-pdc_result2:
-	.block	ASM_PDC_RESULT_SIZE
-
 	.export real_stack
-	.export real32_stack
 	.export real64_stack
-	.align	64
+	__PAGE_ALIGNED_BSS
 real_stack:
-real32_stack:
 real64_stack:
 	.block	8192
 
 #define N_SAVED_REGS 9
-
+	.section	.bss
 save_cr_space:
 	.block	REG_SZ * N_SAVED_REGS
 save_cr_end:
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 375f38d..0797db6 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -50,15 +50,15 @@ void __init setup_cmdline(char **cmdline_p)
 	extern unsigned int boot_args[];
 	char *p;
 
-	/* Collect stuff passed in from the boot loader */
+	*cmdline_p = command_line;
 
 	/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
-	if (boot_args[0] < 64) {
-		/* called from hpux boot loader */
-		boot_command_line[0] = '\0';
-	} else {
-		strscpy(boot_command_line, (char *)__va(boot_args[1]),
-			COMMAND_LINE_SIZE);
+	if (boot_args[0] < 64)
+		return;	/* return if called from hpux boot loader */
+
+	/* Collect stuff passed in from the boot loader */
+	strscpy(boot_command_line, (char *)__va(boot_args[1]),
+		COMMAND_LINE_SIZE);
 
 	/* autodetect console type (if not done by palo yet) */
 	p = boot_command_line;
@@ -75,16 +75,14 @@ void __init setup_cmdline(char **cmdline_p)
 		strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
 
 #ifdef CONFIG_BLK_DEV_INITRD
-		if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
-		{
-		    initrd_start = (unsigned long)__va(boot_args[2]);
-		    initrd_end = (unsigned long)__va(boot_args[3]);
-		}
-#endif
+	/* did palo pass us a ramdisk? */
+	if (boot_args[2] != 0) {
+		initrd_start = (unsigned long)__va(boot_args[2]);
+		initrd_end = (unsigned long)__va(boot_args[3]);
 	}
+#endif
 
 	strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
-	*cmdline_p = command_line;
 }
 
 #ifdef CONFIG_PA11
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 848b0702..09a34b0 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -465,3 +465,31 @@ asmlinkage long parisc_inotify_init1(int flags)
 	flags = FIX_O_NONBLOCK(flags);
 	return sys_inotify_init1(flags);
 }
+
+/*
+ * madvise() wrapper
+ *
+ * Up to kernel v6.1 parisc has different values than all other
+ * platforms for the MADV_xxx flags listed below.
+ * To keep binary compatibility with existing userspace programs
+ * translate the former values to the new values.
+ *
+ * XXX: Remove this wrapper in year 2025 (or later)
+ */
+
+asmlinkage notrace long parisc_madvise(unsigned long start, size_t len_in, int behavior)
+{
+	switch (behavior) {
+	case 65: behavior = MADV_MERGEABLE;	break;
+	case 66: behavior = MADV_UNMERGEABLE;	break;
+	case 67: behavior = MADV_HUGEPAGE;	break;
+	case 68: behavior = MADV_NOHUGEPAGE;	break;
+	case 69: behavior = MADV_DONTDUMP;	break;
+	case 70: behavior = MADV_DODUMP;	break;
+	case 71: behavior = MADV_WIPEONFORK;	break;
+	case 72: behavior = MADV_KEEPONFORK;	break;
+	case 73: behavior = MADV_COLLAPSE;	break;
+	}
+
+	return sys_madvise(start, len_in, behavior);
+}
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 8a99c99..0e42fce 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -131,7 +131,7 @@
 116	common	sysinfo			sys_sysinfo			compat_sys_sysinfo
 117	common	shutdown		sys_shutdown
 118	common	fsync			sys_fsync
-119	common	madvise			sys_madvise
+119	common	madvise			parisc_madvise
 120	common	clone			sys_clone_wrapper
 121	common	setdomainname		sys_setdomainname
 122	common	sendfile		sys_sendfile			compat_sys_sendfile
diff --git a/arch/parisc/kernel/vdso32/Makefile b/arch/parisc/kernel/vdso32/Makefile
index 85b1c6d..4459a48 100644
--- a/arch/parisc/kernel/vdso32/Makefile
+++ b/arch/parisc/kernel/vdso32/Makefile
@@ -26,7 +26,7 @@
 
 # Force dependency (incbin is bad)
 # link rule for the .so file, .lds has to be first
-$(obj)/vdso32.so: $(src)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC)
+$(obj)/vdso32.so: $(src)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE
 	$(call if_changed,vdso32ld)
 
 # assembly rules for the .S files
@@ -38,7 +38,7 @@
 
 # actual build commands
 quiet_cmd_vdso32ld = VDSO32L $@
-      cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $^ -o $@
+      cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
 quiet_cmd_vdso32as = VDSO32A $@
       cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
 quiet_cmd_vdso32cc = VDSO32C $@
diff --git a/arch/parisc/kernel/vdso64/Makefile b/arch/parisc/kernel/vdso64/Makefile
index a30f5ec..f3d6045 100644
--- a/arch/parisc/kernel/vdso64/Makefile
+++ b/arch/parisc/kernel/vdso64/Makefile
@@ -26,7 +26,7 @@
 
 # Force dependency (incbin is bad)
 # link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC)
+$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC) FORCE
 	$(call if_changed,vdso64ld)
 
 # assembly rules for the .S files
@@ -35,7 +35,7 @@
 
 # actual build commands
 quiet_cmd_vdso64ld = VDSO64L $@
-      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
+      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
 quiet_cmd_vdso64as = VDSO64A $@
       cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
 
diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c
index d4be9d2..8bdc5e0 100644
--- a/drivers/parisc/led.c
+++ b/drivers/parisc/led.c
@@ -137,6 +137,9 @@ static int start_task(void)
 
 	/* Create the work queue and queue the LED task */
 	led_wq = create_singlethread_workqueue("led_wq");	
+	if (!led_wq)
+		return -ENOMEM;
+
 	queue_delayed_work(led_wq, &led_task, 0);
 
 	return 0;
diff --git a/tools/arch/parisc/include/uapi/asm/mman.h b/tools/arch/parisc/include/uapi/asm/mman.h
index 506c06a..4cc88a6 100644
--- a/tools/arch/parisc/include/uapi/asm/mman.h
+++ b/tools/arch/parisc/include/uapi/asm/mman.h
@@ -1,20 +1,20 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef TOOLS_ARCH_PARISC_UAPI_ASM_MMAN_FIX_H
 #define TOOLS_ARCH_PARISC_UAPI_ASM_MMAN_FIX_H
-#define MADV_DODUMP	70
+#define MADV_DODUMP	17
 #define MADV_DOFORK	11
-#define MADV_DONTDUMP   69
+#define MADV_DONTDUMP   16
 #define MADV_DONTFORK	10
 #define MADV_DONTNEED   4
 #define MADV_FREE	8
-#define MADV_HUGEPAGE	67
-#define MADV_MERGEABLE   65
-#define MADV_NOHUGEPAGE	68
+#define MADV_HUGEPAGE	14
+#define MADV_MERGEABLE  12
+#define MADV_NOHUGEPAGE 15
 #define MADV_NORMAL     0
 #define MADV_RANDOM     1
 #define MADV_REMOVE	9
 #define MADV_SEQUENTIAL 2
-#define MADV_UNMERGEABLE 66
+#define MADV_UNMERGEABLE 13
 #define MADV_WILLNEED   3
 #define MAP_ANONYMOUS	0x10
 #define MAP_DENYWRITE	0x0800
diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 6cefb43..a5d49b3 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -10,25 +10,13 @@ extern struct timeval bench__start, bench__end, bench__runtime;
  * The madvise transparent hugepage constants were added in glibc
  * 2.13. For compatibility with older versions of glibc, define these
  * tokens if they are not already defined.
- *
- * PA-RISC uses different madvise values from other architectures and
- * needs to be special-cased.
  */
-#ifdef __hppa__
-# ifndef MADV_HUGEPAGE
-#  define MADV_HUGEPAGE		67
-# endif
-# ifndef MADV_NOHUGEPAGE
-#  define MADV_NOHUGEPAGE	68
-# endif
-#else
 # ifndef MADV_HUGEPAGE
 #  define MADV_HUGEPAGE		14
 # endif
 # ifndef MADV_NOHUGEPAGE
 #  define MADV_NOHUGEPAGE	15
 # endif
-#endif
 
 int bench_numa(int argc, const char **argv);
 int bench_sched_messaging(int argc, const char **argv);