diff mbox series

[RFC,08/12] debugobjects: Make object hash locks nested terminal locks

Message ID 1541709268-3766-9-git-send-email-longman@redhat.com (mailing list archive)
State New, archived
Headers show
Series locking/lockdep: Add a new class of terminal locks | expand

Commit Message

Waiman Long Nov. 8, 2018, 8:34 p.m. UTC 
By making the object hash locks nested terminal locks, we can avoid
a bunch of unnecessary lockdep validations as well as saving space
in the lockdep tables.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 lib/debugobjects.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 4216d3d..3182d15 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -1129,8 +1129,13 @@  void __init debug_objects_early_init(void)
 {
 	int i;
 
-	for (i = 0; i < ODEBUG_HASH_SIZE; i++)
+	/*
+	 * Make the obj_hash locks nested terminal locks.
+	 */
+	for (i = 0; i < ODEBUG_HASH_SIZE; i++) {
 		raw_spin_lock_init(&obj_hash[i].lock);
+		lockdep_set_terminal_nested_class(&obj_hash[i].lock);
+	}
 
 	for (i = 0; i < ODEBUG_POOL_SIZE; i++)
 		hlist_add_head(&obj_static_pool[i].node, &obj_pool);