lkml.org 
[lkml]   [2020]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 4.19 044/252] ARM: 8952/1: Disable kmemleak on XIP kernels
Date
From: Vincenzo Frascino <vincenzo.frascino@arm.com>

[ Upstream commit bc420c6ceefbb86cbbc8c00061bd779c17fa6997 ]

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: Sasha Levin <sashal@kernel.org>
---
arch/arm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 185e552f14610..9f03befdfbf06 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -61,7 +61,7 @@ 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
--
2.20.1
\
 
 \ /
  Last update: 2020-02-14 18:14    [W:0.853 / U:0.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site