From: Feng Tang <feng.tang@xxxxxxxxx>
Subject: lib/Kconfig.debug: add ARCH dependency for FUNCTION_ALIGN option
0Day robots reported there is compiling issue for 'csky' ARCH
when CONFIG_DEBUG_FORCE_DATA_SECTION_ALIGNED is enabled [1]:
All errors (new ones prefixed by >>):
{standard input}: Assembler messages:
>> {standard input}:2277: Error: pcrel offset for branch to .LS000B too far (0x3c)
Which was discussed in [2]. And as there is no solution for csky yet, add
some dependency for this config to limit it to several ARCHs which have no
compiling issue so far.
[1]. https://lore.kernel.org/lkml/202202271612.W32UJAj2-lkp@xxxxxxxxx/
[2]. https://www.spinics.net/lists/linux-kbuild/msg30298.html
Link: https://lkml.kernel.org/r/20220304021100.GN4548@xxxxxxxxxxxxxxxxxxxxxxx
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig.debug | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/lib/Kconfig.debug~lib-kconfigdebug-add-arch-dependency-for-function_align-option
+++ a/lib/Kconfig.debug
@@ -439,7 +439,8 @@ config SECTION_MISMATCH_WARN_ONLY
If unsure, say Y.
config DEBUG_FORCE_FUNCTION_ALIGN_64B
- bool "Force all function address 64B aligned" if EXPERT
+ bool "Force all function address 64B aligned"
+ depends on EXPERT && (X86_64 || ARM64 || PPC32 || PPC64 || ARC)
help
There are cases that a commit from one domain changes the function
address alignment of other domains, and cause magic performance
_
