linux-kernel - [PATCH -tip V4 6/8] workqueue: use wq_unbound_online_cpumask in restore_unbound_workers

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Date:   Mon, 11 Jan 2021 23:26:36 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Valentin Schneider <valentin.schneider@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Qian Cai <cai@...hat.com>,
        Vincent Donnefort <vincent.donnefort@....com>,
        Tejun Heo <tj@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Hillf Danton <hdanton@...a.com>,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: [PATCH -tip V4 6/8] workqueue: use wq_unbound_online_cpumask in restore_unbound_workers_cpumask()

From: Lai Jiangshan <laijs@...ux.alibaba.com>

restore_unbound_workers_cpumask() is called when CPU_ONLINE, where
wq_online_cpumask equals to cpu_online_mask.  So no fucntionality
changed.

Acked-by: Tejun Heo <tj@...nel.org>
Tested-by: Paul E. McKenney <paulmck@...nel.org>
Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 kernel/workqueue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index d01cca8e51f9..f2793749bd97 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5043,6 +5043,7 @@ static void restore_unbound_workers_cpumask(struct worker_pool *pool, int cpu)
 	static cpumask_t cpumask;
 	struct worker *worker;
 
+	lockdep_assert_held(&wq_pool_mutex);
 	lockdep_assert_held(&wq_pool_attach_mutex);
 
 	/* is @cpu allowed for @pool? */
@@ -5050,7 +5051,7 @@ static void restore_unbound_workers_cpumask(struct worker_pool *pool, int cpu)
 		return;
 
 	/* is @cpu the only online CPU? */
-	cpumask_and(&cpumask, pool->attrs->cpumask, cpu_online_mask);
+	cpumask_and(&cpumask, pool->attrs->cpumask, wq_unbound_online_cpumask);
 	if (cpumask_weight(&cpumask) != 1)
 		return;
 
-- 
2.19.1.6.gb485710b