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authorLai Jiangshan <laijs@linux.alibaba.com>2020-05-29 08:59:02 +0200
committerTejun Heo <tj@kernel.org>2020-05-29 16:25:23 +0200
commitb8f06b0444ec146e3ae98caac8039c77e5308ce2 (patch)
tree2b0337a366ac25868dc4043f1955fc32dc51e9a8 /kernel
parentworkqueue: void unneeded requeuing the pwq in rescuer thread (diff)
downloadlinux-b8f06b0444ec146e3ae98caac8039c77e5308ce2.tar.xz
linux-b8f06b0444ec146e3ae98caac8039c77e5308ce2.zip
workqueue: remove useless unlock() and lock() in series
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/workqueue.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 6feefc65d332..c667ca5aed61 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -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);