mutex: implement adaptive spinning

[safe/jmp/linux-2.6] / kernel / mutex-debug.h

diff --git a/kernel/mutex-debug.h b/kernel/mutex-debug.h
index babfbdf..6b2d735 100644 (file)
--- a/kernel/mutex-debug.h
+++ b/kernel/mutex-debug.h
@@ -13,14 +13,6 @@
 /*
  * This must be called with lock->wait_lock held.
  */
-extern void
-debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
-
-static inline void debug_mutex_clear_owner(struct mutex *lock)
-{
-       lock->owner = NULL;
-}
-
 extern void debug_mutex_lock_common(struct mutex *lock,
                                    struct mutex_waiter *waiter);
 extern void debug_mutex_wake_waiter(struct mutex *lock,
@@ -35,6 +27,16 @@ extern void debug_mutex_unlock(struct mutex *lock);
 extern void debug_mutex_init(struct mutex *lock, const char *name,
                             struct lock_class_key *key);
 
+static inline void mutex_set_owner(struct mutex *lock)
+{
+       lock->owner = current_thread_info();
+}
+
+static inline void mutex_clear_owner(struct mutex *lock)
+{
+       lock->owner = NULL;
+}
+
 #define spin_lock_mutex(lock, flags)                   \
        do {                                            \
                struct mutex *l = container_of(lock, struct mutex, wait_lock); \