Commit-ID: 242489cfe97d44290e7f88b12591fab6c0819045
Gitweb: http://git.kernel.org/tip/242489cfe97d44290e7f88b12591fab6c0819045
Author: Davidlohr Bueso <davidlohr@xxxxxx>
AuthorDate: Wed, 30 Jul 2014 13:41:50 -0700
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 13 Aug 2014 10:31:58 +0200
locking/mutexes: Standardize arguments in lock/unlock slowpaths
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@xxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: jason.low2@xxxxxx
Cc: aswin@xxxxxx
Cc: mingo@xxxxxxxxxx
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1406752916-3341-1-git-send-email-davidlohr@xxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/locking/mutex.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index ae712b2..ad0e333 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -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
--
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