mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-29 22:02:02 +00:00
Code Issues Releases Wiki Activity

tools compiler.h: Add OPTIMIZER_HIDE_VAR()

Browse source 
Port over the definition of OPTIMIZER_HIDE_VAR() so we can use it in
kselftests.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230728-arm64-signal-memcpy-fix-v4-2-0c1290db5d46@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Brown 2023-07-28 00:26:13 +01:00 committed by Will Deacon
parent d6da04b6fb
commit e5d51a6650
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
tools/include/linux/compiler.h
View file

@ -190,4 +190,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
#define ___PASTE(a, b) a##b
#define __PASTE(a, b) ___PASTE(a, b)
#ifndef OPTIMIZER_HIDE_VAR
/* Make the optimizer believe the variable can be manipulated arbitrarily. */
#define OPTIMIZER_HIDE_VAR(var) \
__asm__ ("" : "=r" (var) : "0" (var))
#endif
#endif /* _TOOLS_LINUX_COMPILER_H */