[PATCH -tip v2 1/7] locking/mutex: Standardize arguments in lock/unlock slowpaths

[Davidlohr Bueso <davidlohr@hp.com>]

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>
---
 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
-- 
1.8.1.4