diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2017-10-11 16:01:22 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-10-11 17:00:42 +0200 |
| commit | a9b608b7bbfe25c1321b3b4dfa45338f91c4c043 (patch) | |
| tree | f0093b6153ac6313463438a282b2211e7627295c | |
| parent | ed83bd0424aba0f8200b1c1c85aefb1a6c3f15e2 (diff) | |
backports: add OPTIMIZER_HIDE_VAR
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | backport/backport-include/linux/compiler-gccN.h | 4 | ||||
| -rw-r--r-- | backport/backport-include/linux/compiler.h | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/backport/backport-include/linux/compiler-gccN.h b/backport/backport-include/linux/compiler-gccN.h index 23ad803d..97e7541d 100644 --- a/backport/backport-include/linux/compiler-gccN.h +++ b/backport/backport-include/linux/compiler-gccN.h @@ -120,3 +120,7 @@ #endif #endif /* gcc version >= 40000 specific checks */ + +#ifndef OPTIMIZER_HIDE_VAR +#define OPTIMIZER_HIDE_VAR(var) __asm__ ("" : "=r" (var) : "0" (var)) +#endif diff --git a/backport/backport-include/linux/compiler.h b/backport/backport-include/linux/compiler.h index e5af565b..53c069df 100644 --- a/backport/backport-include/linux/compiler.h +++ b/backport/backport-include/linux/compiler.h @@ -88,4 +88,8 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s }) #endif +#ifndef OPTIMIZER_HIDE_VAR +#define OPTIMIZER_HIDE_VAR(var) barrier() +#endif + #endif /* __BACKPORT_LINUX_COMPILER_H */ |