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mutex: improve header comment to be actually informative about the API

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Impact: improve documentation

It's nice to say that mutex_trylock follows the spin_trylock convention.
It's a lot nicer if the comment also says which that is...  make it so.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Arjan van de Ven 2008-10-29 14:24:09 -07:00 • committed by Ingo Molnar
parent d1a76187a5
commit d98d38f201
1 changed files with 2 additions and 0 deletions
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2
include/linux/mutex.h
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@ -144,6 +144,8 @@ extern int __must_check mutex_lock_killable(struct mutex *lock);
/* /*
* NOTE: mutex_trylock() follows the spin_trylock() convention, * NOTE: mutex_trylock() follows the spin_trylock() convention,
* not the down_trylock() convention! * not the down_trylock() convention!
*
* Returns 1 if the mutex has been acquired successfully, and 0 on contention.
*/ */
extern int mutex_trylock(struct mutex *lock); extern int mutex_trylock(struct mutex *lock);
extern void mutex_unlock(struct mutex *lock); extern void mutex_unlock(struct mutex *lock);