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Commit 1481197b authored by Dale Farnsworth's avatar Dale Farnsworth Committed by Peter Zijlstra
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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: default avatarDale Farnsworth <dale@farnsworth.org>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bdb9441e

kernel/lockdep.c

+4 −4
Original line number Diff line number Diff line
@@ -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: