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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/microblaze/include/asm/atomic.h | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/microblaze/include/asm/atomic.h')
| -rw-r--r-- | arch/microblaze/include/asm/atomic.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/atomic.h b/arch/microblaze/include/asm/atomic.h new file mode 100644 index 00000000..472d8bf7 --- /dev/null +++ b/arch/microblaze/include/asm/atomic.h @@ -0,0 +1,26 @@ +#ifndef _ASM_MICROBLAZE_ATOMIC_H +#define _ASM_MICROBLAZE_ATOMIC_H + +#include <asm/cmpxchg.h> +#include <asm-generic/atomic.h> +#include <asm-generic/atomic64.h> + +/* + * Atomically test *v and decrement if it is greater than 0. + * The function returns the old value of *v minus 1. + */ +static inline int atomic_dec_if_positive(atomic_t *v) +{ + unsigned long flags; + int res; + + local_irq_save(flags); + res = v->counter - 1; + if (res >= 0) + v->counter = res; + local_irq_restore(flags); + + return res; +} + +#endif /* _ASM_MICROBLAZE_ATOMIC_H */ |