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| author | H. Peter Anvin <hpa@zytor.com> | 2010-02-11 00:55:28 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-11 00:55:28 (GMT) |
| commit | 84abd88a70090cf00f9e45c3a81680874f17626e (patch) | |
| tree | 4f58b80057f6e1f5817af1dc33a5458b3dfc9a99 /include/linux/compiler-gcc4.h | |
| parent | 13ca0fcaa33f6b1984c4111b6ec5df42689fea6f (diff) | |
| parent | e28cab42f384745c8a947a9ccd51e4aae52f5d51 (diff) | |
| download | linux-fsl-qoriq-84abd88a70090cf00f9e45c3a81680874f17626e.tar.xz | |
Merge remote branch 'linus/master' into x86/bootmem
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 450fa59..94dea3f 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 |