commit 2ee91f197c0bc654b24eed5831fd12aa0d566a7d
author Ingo Molnar <mingo@elte.hu> Wed Dec 06 20:39:32 2006 -0800
committer Linus Torvalds <torvalds@woody.osdl.org> Thu Dec 07 08:39:43 2006 -0800
tree 85f9013d1cf17d6a947bbad723ce0cb5427a3dac
parent 50cc670aebf4fc64afaf533fb9fa1c8570f09d74

[PATCH] lockdep: show more details about self-test failures

Make the locking self-test failures (of 'FAILURE' type) easier to debug by
printing more information.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/mutex-debug.c

diff --git a/kernel/mutex-debug.c b/kernel/mutex-debug.c
index 1865164..841539d 100644
--- a/kernel/mutex-debug.c
+++ b/kernel/mutex-debug.c
@@ -77,6 +77,9 @@
 
 void debug_mutex_unlock(struct mutex *lock)
 {
+	if (unlikely(!debug_locks))
+		return;
+
 	DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
 	DEBUG_LOCKS_WARN_ON(lock->magic != lock);
 	DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);