locking/lockdep: Remove a superfluous INIT_LIST_HEAD() statement

Initializing a list entry just before it is passed to list_add_tail_rcu()
is not necessary because list_add_tail_rcu() overwrites the next and prev
pointers anyway. Hence remove the INIT_LIST_HEAD() statement.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20181207011148.251812-12-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 81388d0..346b5a1 100644 (file)
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -792,7 +792,6 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force)
        class->key = key;
        class->name = lock->name;
        class->subclass = subclass;
-       INIT_LIST_HEAD(&class->lock_entry);
        INIT_LIST_HEAD(&class->locks_before);
        INIT_LIST_HEAD(&class->locks_after);
        class->name_version = count_matching_names(class);