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From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>,
	Lai Jiangshan <jiangshanlai@gmail.com>
Cc: linux-kernel@vger.kernel.org,
	Juri Lelli <juri.lelli@redhat.com>,
	Cestmir Kalina <ckalina@redhat.com>,
	Alex Gladkov <agladkov@redhat.com>,
	Phil Auld <pauld@redhat.com>,
	Costa Shulyupin <cshulyup@redhat.com>,
	Waiman Long <longman@redhat.com>
Subject: [PATCH wq/for-6.9 v5 1/4] workqueue: Link pwq's into wq->pwqs from oldest to newest
Date: Thu,  8 Feb 2024 11:10:11 -0500
Message-Id: <20240208161014.1084943-2-longman@redhat.com>
In-Reply-To: <20240208161014.1084943-1-longman@redhat.com>
References: <20240208161014.1084943-1-longman@redhat.com>
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Add a new pwq into the tail of wq->pwqs so that pwq iteration will
start from the oldest pwq to the newest. This ordering will facilitate
the inclusion of ordered workqueues in a wq_unbound_cpumask update.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index cf514ba0dfc3..fa7bd3b34f52 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4804,7 +4804,7 @@ static void link_pwq(struct pool_workqueue *pwq)
 	pwq->work_color = wq->work_color;
 
 	/* link in @pwq */
-	list_add_rcu(&pwq->pwqs_node, &wq->pwqs);
+	list_add_tail_rcu(&pwq->pwqs_node, &wq->pwqs);
 }
 
 /* obtain a pool matching @attr and create a pwq associating the pool and @wq */
-- 
2.39.3