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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2016-04-30 13:18:46 +0200 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2016-04-30 18:36:22 +0200 |
| commit | 250c6572bdf0dde579cd4f62ae5c0964bc445b58 (patch) | |
| tree | b00e46ac85111819fded505d053049848b316efb | |
| parent | 61cbbfb9198ec7723cb1db2ed2f7ca7a72f92f00 (diff) | |
header: add barrier_data()
barrier_data() was added in Linux commit 7829fb09 "lib: make
memzero_explicit more robust against dead store elimination".
This is needed by memzero_explicit added in the next patch.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
| -rw-r--r-- | backport/backport-include/linux/compiler.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/backport/backport-include/linux/compiler.h b/backport/backport-include/linux/compiler.h index 613b857a..0b2358c6 100644 --- a/backport/backport-include/linux/compiler.h +++ b/backport/backport-include/linux/compiler.h @@ -25,4 +25,12 @@ # define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __LINE__) #endif +#ifndef barrier_data +#ifdef __GNUC__ +#define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory") +#else /* __GNUC__ */ +# define barrier_data(ptr) barrier() +#endif /* __GNUC__ */ +#endif + #endif /* __BACKPORT_LINUX_COMPILER_H */ |