[patch, -rc5-mm1] lock validator, fix NULL type->name bug

[Ingo Molnar <mingo@elte.hu>]

Subject: lock validator, fix NULL type->name bug
From: Ingo Molnar <mingo@elte.hu>

this should fix the bug reported Mike Galbraith: pass in a non-NULL 
mutex name string even if DEBUG_MUTEXES is turned off.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 include/linux/mutex.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/include/linux/mutex.h
===================================================================
--- linux.orig/include/linux/mutex.h
+++ linux/include/linux/mutex.h
@@ -80,7 +80,7 @@ struct mutex_waiter {
 do {							\
 	static struct lockdep_type_key __key;		\
 							\
-	__mutex_init((mutex), NULL, &__key);		\
+	__mutex_init((mutex), #mutex, &__key);		\
 } while (0)
 # define mutex_destroy(mutex)				do { } while (0)
 #endif
-
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