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Subject[PATCH 4/4] workqueue: remove useless unlock() and lock() in series
Date
This is no point to unlock() and then lock() the same mutex
back to back.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
kernel/workqueue.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index c0cbe0de95d0..415893cfb074 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4383,13 +4383,11 @@ void destroy_workqueue(struct workqueue_struct *wq)
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);

--
2.20.1
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