From mboxrd@z Thu Jan 1 00:00:00 1970 From: Waiman Long Subject: [PATCH v2 09/17] debugobjects: Make object hash locks nestable terminal locks Date: Mon, 19 Nov 2018 13:55:18 -0500 Message-ID: <1542653726-5655-10-git-send-email-longman@redhat.com> References: <1542653726-5655-1-git-send-email-longman@redhat.com> Return-path: In-Reply-To: <1542653726-5655-1-git-send-email-longman@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: Peter Zijlstra , Ingo Molnar , Will Deacon , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Petr Mladek , Sergey Senozhatsky , Andrey Ryabinin , Tejun Heo , Andrew Morton , Waiman Long List-Id: iommu@lists.linux-foundation.org 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 --- 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