Port over the definition of OPTIMIZER_HIDE_VAR() so we can use it in kselftests.
Signed-off-by: Mark Brown broonie@kernel.org --- tools/include/linux/compiler.h | 6 ++++++ 1 file changed, 6 insertions(+)
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 */