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Commit 5ce97039 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Test whether the task is queued before grabbing the queue spinlocks 



When asked to wake up an RPC task, it makes sense to test whether or not
the task is still queued.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 359c48c0

net/sunrpc/sched.c

+4 −0
Original line number Diff line number Diff line
@@ -479,6 +479,8 @@ void rpc_wake_up_queued_task_on_wq(struct workqueue_struct *wq, 
		struct rpc_wait_queue *queue,

		struct rpc_task *task)

{

	if (!RPC_IS_QUEUED(task))

		return;

	spin_lock_bh(&queue->lock);

	rpc_wake_up_task_on_wq_queue_locked(wq, queue, task);

	spin_unlock_bh(&queue->lock);
@@ -489,6 +491,8 @@ void rpc_wake_up_queued_task_on_wq(struct workqueue_struct *wq, 
 */

void rpc_wake_up_queued_task(struct rpc_wait_queue *queue, struct rpc_task *task)

{

	if (!RPC_IS_QUEUED(task))

		return;

	spin_lock_bh(&queue->lock);

	rpc_wake_up_task_queue_locked(queue, task);

	spin_unlock_bh(&queue->lock);