X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Fmutex-debug.c;h=ec815a960b5d526a29992dfd59e30ae21e35d9f3;hb=5dab600e6a153ceb64832f608069e6c08185411a;hp=18651641a7b5aa6482e0aa73ce03b5133e6ffa91;hpb=4dfbb9d8c6cbfc32faa5c71145bd2a43e1f8237c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/kernel/mutex-debug.c b/kernel/mutex-debug.c
index 1865164..ec815a9 100644
--- a/kernel/mutex-debug.c
+++ b/kernel/mutex-debug.c
@@ -13,10 +13,10 @@
  *  Released under the General Public License (GPL).
  */
 #include <linux/mutex.h>
-#include <linux/sched.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/poison.h>
+#include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>
@@ -27,11 +27,6 @@
 /*
  * Must be called with lock->wait_lock held.
  */
-void debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner)
-{
-	lock->owner = new_owner;
-}
-
 void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
 {
 	memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
@@ -60,7 +55,6 @@ void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter,
 
 	/* Mark the current thread as blocked on the lock: */
 	ti->task->blocked_on = waiter;
-	waiter->lock = lock;
 }
 
 void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
@@ -77,10 +71,13 @@ void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
 
 void debug_mutex_unlock(struct mutex *lock)
 {
-	DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
+	if (unlikely(!debug_locks))
+		return;
+
 	DEBUG_LOCKS_WARN_ON(lock->magic != lock);
-	DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
 	DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
+	DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
+	mutex_clear_owner(lock);
 }
 
 void debug_mutex_init(struct mutex *lock, const char *name,
@@ -93,7 +90,6 @@ void debug_mutex_init(struct mutex *lock, const char *name,
 	debug_check_no_locks_freed((void *)lock, sizeof(*lock));
 	lockdep_init_map(&lock->dep_map, name, key, 0);
 #endif
-	lock->owner = NULL;
 	lock->magic = lock;
 }
 
@@ -105,7 +101,7 @@ void debug_mutex_init(struct mutex *lock, const char *name,
  * use of the mutex is forbidden. The mutex must not be locked when
  * this function is called.
  */
-void fastcall mutex_destroy(struct mutex *lock)
+void mutex_destroy(struct mutex *lock)
 {
 	DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock));
 	lock->magic = NULL;