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| author | Paul Mackerras <paulus@samba.org> | 2008-04-14 21:11:02 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-04-14 21:11:02 +1000 |
| commit | ac7c5353b189e10cf5dd27399f64f7b013abffc6 (patch) | |
| tree | 8222d92b774c256d6ec4399c716d76b3f05ddc4b /include/linux/spinlock.h | |
| parent | a8f75ea70c58546205fb7673be41455b9da5d9a7 (diff) | |
| parent | 120dd64cacd4fb796bca0acba3665553f1d9ecaa (diff) | |
| download | blackbird-op-linux-ac7c5353b189e10cf5dd27399f64f7b013abffc6.tar.gz blackbird-op-linux-ac7c5353b189e10cf5dd27399f64f7b013abffc6.zip | |
Merge branch 'linux-2.6'
Diffstat (limited to 'include/linux/spinlock.h')
| -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, * atomic_dec_and_lock - lock on reaching reference count zero * @atomic: the atomic counter * @lock: the spinlock in question + * + * Decrements @atomic by 1. If the result is 0, returns true and locks + * @lock. Returns false for all other cases. */ extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock); #define atomic_dec_and_lock(atomic, lock) \ |
