[PATCH] workqueue: Remove rcu_read_lock/unlock() in workqueue_congested()

[qiang . zhang]

From: Zqiang <qiang.zh...@windriver.com>

The RCU read critical area already by preempt_disable/enable()
(equivalent to rcu_read_lock_sched/unlock_sched()) mark, so remove
rcu_read_lock/unlock().

Signed-off-by: Zqiang <qiang.zh...@windriver.com>
---
 kernel/workqueue.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 0d150da252e8..c599835ad6c3 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4540,7 +4540,6 @@ bool workqueue_congested(int cpu, struct workqueue_struct 
*wq)
        struct pool_workqueue *pwq;
        bool ret;
 
-       rcu_read_lock();
        preempt_disable();
 
        if (cpu == WORK_CPU_UNBOUND)
@@ -4553,7 +4552,6 @@ bool workqueue_congested(int cpu, struct workqueue_struct 
*wq)
 
        ret = !list_empty(&pwq->delayed_works);
        preempt_enable();
-       rcu_read_unlock();
 
        return ret;
 }
-- 
2.25.1