Messages in this thread Patch in this message |  | | From | "J. Bruce Fields" <> | Subject | [PATCH] Spell out behavior of atomic_dec_and_lock() in kerneldoc | Date | Mon, 7 Apr 2008 15:59:05 -0400 |
| |
A little more detail here wouldn't hurt.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> --- 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 576a5f7..1129ee0 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) \ -- 1.5.5.rc1
|  |