[PATCH] lockdep: prove mutex locking correctness

[karo-tx-linux.git] / kernel / mutex-debug.c

diff --git a/kernel/mutex-debug.c b/kernel/mutex-debug.c
index 5569766a1ea2f54fac9e9f8bffdfc3472ae5184e..e3203c654dda80ab646ffcbd4b0306e942fde846 100644 (file)
--- a/kernel/mutex-debug.c
+++ b/kernel/mutex-debug.c
@@ -83,12 +83,16 @@ void debug_mutex_unlock(struct mutex *lock)
        DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
 }
 
-void debug_mutex_init(struct mutex *lock, const char *name)
+void debug_mutex_init(struct mutex *lock, const char *name,
+                     struct lock_class_key *key)
 {
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
        /*
         * Make sure we are not reinitializing a held lock:
         */
        debug_check_no_locks_freed((void *)lock, sizeof(*lock));
+       lockdep_init_map(&lock->dep_map, name, key);
+#endif
        lock->owner = NULL;
        lock->magic = lock;
 }