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workqueue: remove useless unlock() and lock() in series

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This is no point to unlock() and then lock() the same mutex
back to back.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan
2020-05-29 06:59:02 +00:00
committed by Tejun Heo
parent 4f3f4cf388
commit b8f06b0444
1 changed files with 0 additions and 2 deletions
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2
kernel/workqueue.c
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@@ -4403,13 +4403,11 @@ void destroy_workqueue(struct workqueue_struct *wq)
raw_spin_unlock_irq(&pwq->pool->lock);
}
mutex_unlock(&wq->mutex);
mutex_unlock(&wq_pool_mutex);
/*
* wq list is used to freeze wq, remove from list after
* flushing is complete in case freeze races us.
*/
mutex_lock(&wq_pool_mutex);
list_del_rcu(&wq->list);
mutex_unlock(&wq_pool_mutex);