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authorAlexandros Batsakis <batsakis@netapp.com>2009-12-14 21:27:53 -0800
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-12-15 13:51:17 -0500
commit48f186124220794fce85ed1439fc32f16f69d3e2 (patch)
treec200395b4238a19d6653b23a43537ac29b7b8cf4
parentafe6c27ccb8cc31ce8ed0bd3589ce549f523c8e7 (diff)
rpc: add rpc_queue_empty function
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--include/linux/sunrpc/sched.h1
-rw-r--r--net/sunrpc/sched.c14
2 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 1906782ec86..9157405f932 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -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 *);
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index cef74ba0666..89ea8e69ec7 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -385,6 +385,20 @@ static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct r
}
/*
+ * 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
*/
void rpc_wake_up_queued_task(struct rpc_wait_queue *queue, struct rpc_task *task)