linux-kernel - [tip:locking/core] locking/lockdep: Remove a superfluous INIT_LIST

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Date:   Tue, 11 Dec 2018 07:28:28 -0800
From:   tip-bot for Bart Van Assche <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     longman@...hat.com, bvanassche@....org,
        torvalds@...ux-foundation.org, hpa@...or.com, mingo@...nel.org,
        johannes@...solutions.net, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, sasha.levin@...cle.com, peterz@...radead.org
Subject: [tip:locking/core] locking/lockdep: Remove a superfluous
 INIT_LIST_HEAD() statement

Commit-ID:  a66b6922dc6a5ece60ea9326153da3b062977a4d
Gitweb:     https://git.kernel.org/tip/a66b6922dc6a5ece60ea9326153da3b062977a4d
Author:     Bart Van Assche <bvanassche@....org>
AuthorDate: Thu, 6 Dec 2018 17:11:35 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 11 Dec 2018 14:54:54 +0100

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@....org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Johannes Berg <johannes@...solutions.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Sasha Levin <sasha.levin@...cle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Waiman Long <longman@...hat.com>
Cc: johannes.berg@...el.com
Cc: tj@...nel.org
Link: https://lkml.kernel.org/r/20181207011148.251812-12-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/locking/lockdep.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 81388d028ac7..346b5a1fd062 100644
--- 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);