By making the object hash locks nestable 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 <long...@redhat.com>
---
 lib/debugobjects.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 4216d3d..c6f3967 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 nestable terminal locks.
+        */
+       for (i = 0; i < ODEBUG_HASH_SIZE; i++) {
                raw_spin_lock_init(&obj_hash[i].lock);
+               lockdep_set_terminal_nestable_class(&obj_hash[i].lock);
+       }
 
        for (i = 0; i < ODEBUG_POOL_SIZE; i++)
                hlist_add_head(&obj_static_pool[i].node, &obj_pool);
-- 
1.8.3.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

Reply via email to