diff options
| author | Mark Brown <broonie@kernel.org> | 2023-07-28 00:26:13 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-08-04 17:36:52 +0100 |
| commit | e5d51a6650211baf38daa894d06c47748978e141 (patch) | |
| tree | 1e4e5f6f6a7c2062a2f2dac2183b6c9b897c1113 /tools/include/linux | |
| parent | d6da04b6fbabf4b464bfe29e34ff10c62024d1e4 (diff) | |
tools compiler.h: Add OPTIMIZER_HIDE_VAR()
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>
Diffstat (limited to 'tools/include/linux')
| -rw-r--r-- | tools/include/linux/compiler.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h index 9d36c8ce1fe7..f75cced41d59 100644 --- a/tools/include/linux/compiler.h +++ b/tools/include/linux/compiler.h @@ -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 */ |