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Commit dc07e721 authored by J. Bruce Fields's avatar J. Bruce Fields Committed by Jonathan Corbet
Browse files

Spell out behavior of atomic_dec_and_lock() in kerneldoc 



A little more detail here wouldn't hurt.

Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent b40b5162

include/linux/spinlock.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -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_dec_and_lock - lock on reaching reference count zero

 * @atomic: the atomic counter

 * @atomic: the atomic counter

 * @lock: the spinlock in question

 * @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);

extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);

#define atomic_dec_and_lock(atomic, lock) \

#define atomic_dec_and_lock(atomic, lock) \