diff options
Diffstat (limited to 'include/asm-arm26/atomic.h')
| -rw-r--r-- | include/asm-arm26/atomic.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-arm26/atomic.h b/include/asm-arm26/atomic.h index 54b24ea..a47cadc 100644 --- a/include/asm-arm26/atomic.h +++ b/include/asm-arm26/atomic.h @@ -76,6 +76,21 @@ static inline int atomic_cmpxchg(atomic_t *v, int old, int new) return ret; } +static inline int atomic_add_unless(atomic_t *v, int a, int u) +{ + int ret; + unsigned long flags; + + local_irq_save(flags); + ret = v->counter; + if (ret != u) + v->counter += a; + local_irq_restore(flags); + + return ret != u; +} +#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) + static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) { unsigned long flags; |
