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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-02-19 06:14:24 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-02-19 06:14:24 +0000 |
| commit | 6fafeb146e9efd59140ea58cebd7dd38ae9a6379 (patch) | |
| tree | 7db89ba6a28932514b105d620bba4884ec332ec3 /libdde_linux26/contrib/include/asm-generic/cmpxchg.h | |
| parent | 38c2c2458e3f4ecb329ff35621806252aac209b9 (diff) | |
| parent | 8df772b3c665e663f6f9d2a70f9c691590bd3f91 (diff) | |
Merge branch 'dde' into upstream-merged
Diffstat (limited to 'libdde_linux26/contrib/include/asm-generic/cmpxchg.h')
| -rw-r--r-- | libdde_linux26/contrib/include/asm-generic/cmpxchg.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/libdde_linux26/contrib/include/asm-generic/cmpxchg.h b/libdde_linux26/contrib/include/asm-generic/cmpxchg.h new file mode 100644 index 00000000..213ac6e8 --- /dev/null +++ b/libdde_linux26/contrib/include/asm-generic/cmpxchg.h @@ -0,0 +1,22 @@ +#ifndef __ASM_GENERIC_CMPXCHG_H +#define __ASM_GENERIC_CMPXCHG_H + +/* + * Generic cmpxchg + * + * Uses the local cmpxchg. Does not support SMP. + */ +#ifdef CONFIG_SMP +#error "Cannot use generic cmpxchg on SMP" +#endif + +/* + * Atomic compare and exchange. + * + * Do not define __HAVE_ARCH_CMPXCHG because we want to use it to check whether + * a cmpxchg primitive faster than repeated local irq save/restore exists. + */ +#define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n)) +#define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n)) + +#endif |