Commit 93d81d1a authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

mutex: small cleanup 



Remove a local variable by combining an assingment and test in one.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a6525042

kernel/mutex.c

+2 −5
Original line number Diff line number Diff line
@@ -129,7 +129,6 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, 
{

	struct task_struct *task = current;

	struct mutex_waiter waiter;

	unsigned int old_val;

	unsigned long flags;



	spin_lock_mutex(&lock->wait_lock, flags);
@@ -142,8 +141,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, 
	list_add_tail(&waiter.list, &lock->wait_list);

	waiter.task = task;



	old_val = atomic_xchg(&lock->count, -1);

	if (old_val == 1)

	if (atomic_xchg(&lock->count, -1) == 1)

		goto done;



	lock_contended(&lock->dep_map, ip);
@@ -158,8 +156,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, 
		 * that when we release the lock, we properly wake up the

		 * other waiters:

		 */

		old_val = atomic_xchg(&lock->count, -1);

		if (old_val == 1)

		if (atomic_xchg(&lock->count, -1) == 1)

			break;



		/*