Subject: lockdep: include all lock classes in all_lock_classes

Add each lock class to the all_lock_classes list when it is
first registered.

Previously, lock classes were added to all_lock_classes when
the lock class was first used.  Since one of the uses of the
list is to find unused locks, this didn't work well.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 3574379f4d62..81a4e4a3f087 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -779,6 +779,10 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force)
          * parallel walking of the hash-list safe:
          */
         list_add_tail_rcu(&class->hash_entry, hash_head);
+        /*
+         * Add it to the global list of classes:
+         */
+        list_add_tail_rcu(&class->lock_entry, &all_lock_classes);
 
         if (verbose(class)) {
                 graph_unlock();
@@ -2282,10 +2286,6 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
                         return 0;
                 break;
         case LOCK_USED:
-                /*
-                 * Add it to the global list of classes:
-                 */
-                list_add_tail_rcu(&this->class->lock_entry, &all_lock_classes);
                 debug_atomic_dec(&nr_unused_locks);
                 break;
         default: