blob: de7e5ad38854b340e9d1290acf606730f76da93a [file] [log] [blame]
From 21402976a542fb3c3a38186684b53e9f747419ec Mon Sep 17 00:00:00 2001
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: Fri, 10 Jan 2020 13:39:26 +0100
Subject: [PATCH] ARM: 8952/1: Disable kmemleak on XIP kernels
commit bc420c6ceefbb86cbbc8c00061bd779c17fa6997 upstream.
Kmemleak relies on specific symbols to register the read only data
during init (e.g. __start_ro_after_init).
Trying to build an XIP kernel on arm results in the linking error
reported below because when this option is selected read only data
after init are not allowed since .data is read only (.rodata).
arm-linux-gnueabihf-ld: mm/kmemleak.o: in function `kmemleak_init':
kmemleak.c:(.init.text+0x148): undefined reference to `__end_ro_after_init'
arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x14c):
undefined reference to `__end_ro_after_init'
arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x150):
undefined reference to `__start_ro_after_init'
arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x156):
undefined reference to `__start_ro_after_init'
arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x162):
undefined reference to `__start_ro_after_init'
arm-linux-gnueabihf-ld: kmemleak.c:(.init.text+0x16a):
undefined reference to `__start_ro_after_init'
linux/Makefile:1078: recipe for target 'vmlinux' failed
Fix the issue enabling kmemleak only on non XIP kernels.
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6029d324911c..69cc2b599bb7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -67,7 +67,7 @@ config ARM
select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32
select HAVE_CONTEXT_TRACKING
select HAVE_C_RECORDMCOUNT
- select HAVE_DEBUG_KMEMLEAK
+ select HAVE_DEBUG_KMEMLEAK if !XIP_KERNEL
select HAVE_DMA_CONTIGUOUS if MMU
select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
--
2.7.4