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| author | Ingo Molnar <mingo@elte.hu> | 2009-12-07 13:14:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-07 13:14:18 +0100 |
| commit | f3d607c6b39bd9cb5000e03e2c0dc2afe1241374 (patch) | |
| tree | 885b5e0b5bb3d87efc4bfbde69feff2ece32ecac /include/linux/compiler-gcc4.h | |
| parent | 8055039c2a2454c7159dcbde3161943b757a6e0e (diff) | |
| parent | 6ec22f9b037fc0c2e00ddb7023fad279c365324d (diff) | |
| download | kernel-crypto-f3d607c6b39bd9cb5000e03e2c0dc2afe1241374.tar.gz kernel-crypto-f3d607c6b39bd9cb5000e03e2c0dc2afe1241374.tar.xz kernel-crypto-f3d607c6b39bd9cb5000e03e2c0dc2afe1241374.zip | |
Merge branch 'linus' into x86/urgent
Merge reason: we want to queue up a dependent fix.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/compiler-gcc4.h')
| -rw-r--r-- | include/linux/compiler-gcc4.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h index 450fa597c94..94dea3ffbfa 100644 --- a/include/linux/compiler-gcc4.h +++ b/include/linux/compiler-gcc4.h @@ -36,4 +36,26 @@ the kernel context */ #define __cold __attribute__((__cold__)) + +#if __GNUC_MINOR__ >= 5 +/* + * Mark a position in code as unreachable. This can be used to + * suppress control flow warnings after asm blocks that transfer + * control elsewhere. + * + * Early snapshots of gcc 4.5 don't support this and we can't detect + * this in the preprocessor, but we can live with this because they're + * unreleased. Really, we need to have autoconf for the kernel. + */ +#define unreachable() __builtin_unreachable() +#endif + +#endif + +#if __GNUC_MINOR__ > 0 +#define __compiletime_object_size(obj) __builtin_object_size(obj, 0) +#endif +#if __GNUC_MINOR__ >= 4 +#define __compiletime_warning(message) __attribute__((warning(message))) +#define __compiletime_error(message) __attribute__((error(message))) #endif |