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workqueue: Replace call_rcu_sched() with call_rcu()

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Now that call_rcu()'s callback is not invoked until after all
preempt-disable regions of code have completed (in addition to explicitly
marked RCU read-side critical sections), call_rcu() can be used in place
of call_rcu_sched().  This commit therefore makes that change.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Paul E. McKenney 2018-11-06 19:18:45 -08:00
parent cb2f55369d
commit 25b0077511
1 changed files with 4 additions and 4 deletions
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8
kernel/workqueue.c
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@ -3396,7 +3396,7 @@ static void put_unbound_pool(struct worker_pool *pool)
del_timer_sync(&pool->mayday_timer);
/* sched-RCU protected to allow dereferences from get_work_pool() */
call_rcu_sched(&pool->rcu, rcu_free_pool);
call_rcu(&pool->rcu, rcu_free_pool);
}
/**
@ -3503,14 +3503,14 @@ static void pwq_unbound_release_workfn(struct work_struct *work)
put_unbound_pool(pool);
mutex_unlock(&wq_pool_mutex);
call_rcu_sched(&pwq->rcu, rcu_free_pwq);
call_rcu(&pwq->rcu, rcu_free_pwq);
/*
* If we're the last pwq going away, @wq is already dead and no one
* is gonna access it anymore. Schedule RCU free.
*/
if (is_last)
call_rcu_sched(&wq->rcu, rcu_free_wq);
call_rcu(&wq->rcu, rcu_free_wq);
}
/**
@ -4195,7 +4195,7 @@ void destroy_workqueue(struct workqueue_struct *wq)
* The base ref is never dropped on per-cpu pwqs. Directly
* schedule RCU free.
*/
call_rcu_sched(&wq->rcu, rcu_free_wq);
call_rcu(&wq->rcu, rcu_free_wq);
} else {
/*
* We're the sole accessor of @wq at this point. Directly