SUNRPC: Reduce asynchronous RPC task stack usage

From: Trond Myklebust <Trond.Myklebust@netapp.com>

We should just farm out asynchronous RPC tasks immediately to rpciod...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

 net/sunrpc/sched.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)


diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index c8979ce..22a097f 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -720,7 +720,12 @@ void rpc_execute(struct rpc_task *task)
 {
 	rpc_set_active(task);
 	rpc_set_running(task);
-	__rpc_execute(task);
+	if (RPC_IS_ASYNC(task)) {
+		INIT_WORK(&task->u.tk_work, rpc_async_schedule);
+		queue_work(rpciod_workqueue, &task->u.tk_work);
+
+	} else
+		__rpc_execute(task);
 }
 
 static void rpc_async_schedule(struct work_struct *work)