SUNRPC: rpc_delay() should not clobber the rpc_task->tk_status

Doing so prevents stuff like call_encode() from working correctly.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/sched.c

@@ -542,24 +542,20 @@ void rpc_wake_up_status(struct rpc_wait_queue *queue, int status)
 	spin_unlock_bh(&queue->lock);
 }
 
+static void __rpc_atrun(struct rpc_task *task)
+{
+	rpc_wake_up_task(task);
+}
+
 /*
  * Run a task at a later time
  */
-static void	__rpc_atrun(struct rpc_task *);
-void
-rpc_delay(struct rpc_task *task, unsigned long delay)
+void rpc_delay(struct rpc_task *task, unsigned long delay)
 {
 	task->tk_timeout = delay;
 	rpc_sleep_on(&delay_queue, task, NULL, __rpc_atrun);
 }
 
-static void
-__rpc_atrun(struct rpc_task *task)
-{
-	task->tk_status = 0;
-	rpc_wake_up_task(task);
-}
-
 /*
  * Helper to call task->tk_ops->rpc_call_prepare
  */