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Date:	Sun, 27 Jul 2014 22:18:38 -0700
From:	Davidlohr Bueso <>
Subject: [PATCH -tip/master 1/7] locking/mutex: Unify 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 <>
 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);

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