diff options
| -rw-r--r-- | include/linux/spinlock.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h index 576a5f77d3bd..1129ee0a7180 100644 --- a/include/linux/spinlock.h +++ b/include/linux/spinlock.h | |||
| @@ -341,6 +341,9 @@ static inline void double_spin_unlock(spinlock_t *l1, spinlock_t *l2, | |||
| 341 | * atomic_dec_and_lock - lock on reaching reference count zero | 341 | * atomic_dec_and_lock - lock on reaching reference count zero |
| 342 | * @atomic: the atomic counter | 342 | * @atomic: the atomic counter |
| 343 | * @lock: the spinlock in question | 343 | * @lock: the spinlock in question |
| 344 | * | ||
| 345 | * Decrements @atomic by 1. If the result is 0, returns true and locks | ||
| 346 | * @lock. Returns false for all other cases. | ||
| 344 | */ | 347 | */ |
| 345 | extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock); | 348 | extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock); |
| 346 | #define atomic_dec_and_lock(atomic, lock) \ | 349 | #define atomic_dec_and_lock(atomic, lock) \ |