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locking/mutexes: Standardize arguments in lock/unlock slowpaths

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Just how the locking-end behaves, when unlocking, go ahead and
obtain the proper data structure immediately after the previous
(asm-end) call exits and there are (probably) pending waiters.
This simplifies a bit some of the layering.

Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: jason.low2@hp.com
Cc: aswin@hp.com
Cc: mingo@kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1406752916-3341-1-git-send-email-davidlohr@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Davidlohr Bueso 2014-07-30 13:41:50 -07:00 committed by Ingo Molnar
parent 2e39465abc
commit 242489cfe9
1 changed files with 4 additions and 3 deletions
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7
kernel/locking/mutex.c
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@ -679,9 +679,8 @@ EXPORT_SYMBOL_GPL(__ww_mutex_lock_interruptible);
* Release the lock, slowpath:
*/
static inline void
__mutex_unlock_common_slowpath(atomic_t *lock_count, int nested)
__mutex_unlock_common_slowpath(struct mutex *lock, int nested)
{
struct mutex *lock = container_of(lock_count, struct mutex, count);
unsigned long flags;
/*
@ -716,7 +715,9 @@ __mutex_unlock_common_slowpath(atomic_t *lock_count, int nested)
__visible void
__mutex_unlock_slowpath(atomic_t *lock_count)
{
__mutex_unlock_common_slowpath(lock_count, 1);
struct mutex *lock = container_of(lock_count, struct mutex, count);
__mutex_unlock_common_slowpath(lock, 1);
}
#ifndef CONFIG_DEBUG_LOCK_ALLOC