diff options
Diffstat (limited to 'include/asm-frv/atomic.h')
| -rw-r--r-- | include/asm-frv/atomic.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-frv/atomic.h b/include/asm-frv/atomic.h index 55f06a0e949f..f6539ff569c5 100644 --- a/include/asm-frv/atomic.h +++ b/include/asm-frv/atomic.h @@ -416,4 +416,14 @@ extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new); #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new)) +#define atomic_add_unless(v, a, u) \ +({ \ + int c, old; \ + c = atomic_read(v); \ + while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ + c = old; \ + c != (u); \ +}) +#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) + #endif /* _ASM_ATOMIC_H */ |