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rpc: add rpc_queue_empty function

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Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Alexandros Batsakis 2009-12-14 21:27:53 -08:00 committed by Trond Myklebust
parent afe6c27ccb
commit 48f1861242
2 changed files with 15 additions and 0 deletions
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1
include/linux/sunrpc/sched.h
View File

@ -229,6 +229,7 @@ void rpc_wake_up_queued_task(struct rpc_wait_queue *,
void rpc_wake_up(struct rpc_wait_queue *);
struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
void rpc_wake_up_status(struct rpc_wait_queue *, int);
int rpc_queue_empty(struct rpc_wait_queue *);
void rpc_delay(struct rpc_task *, unsigned long);
void * rpc_malloc(struct rpc_task *, size_t);
void rpc_free(void *);

14
net/sunrpc/sched.c
View File

@ -384,6 +384,20 @@ static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct r
__rpc_do_wake_up_task(queue, task);
}
/*
* Tests whether rpc queue is empty
*/
int rpc_queue_empty(struct rpc_wait_queue *queue)
{
int res;
spin_lock_bh(&queue->lock);
res = queue->qlen;
spin_unlock_bh(&queue->lock);
return (res == 0);
}
EXPORT_SYMBOL_GPL(rpc_queue_empty);
/*
* Wake up a task on a specific queue
*/