SUNRPC: Clean up initialisation of the struct rpc_rqst

Move the initialisation back into xprt.c.
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Yihao Wu <wuyihaolinux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

include/linux/sunrpc/xprt.h

@@ -325,7 +325,6 @@ struct xprt_class {
 struct rpc_xprt		*xprt_create_transport(struct xprt_create *args);
 void			xprt_connect(struct rpc_task *task);
 void			xprt_reserve(struct rpc_task *task);
-void			xprt_request_init(struct rpc_task *task);
 void			xprt_retry_reserve(struct rpc_task *task);
 int			xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
 int			xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);

net/sunrpc/clnt.c

@@ -1558,7 +1558,6 @@ call_reserveresult(struct rpc_task *task)
 	task->tk_status = 0;
 	if (status >= 0) {
 		if (task->tk_rqstp) {
-			xprt_request_init(task);
 			task->tk_action = call_refresh;
 			return;
 		}

net/sunrpc/xprt.c

@@ -1257,6 +1257,55 @@ void xprt_free(struct rpc_xprt *xprt)
 }
 EXPORT_SYMBOL_GPL(xprt_free);
 
+static __be32
+xprt_alloc_xid(struct rpc_xprt *xprt)
+{
+	__be32 xid;
+
+	spin_lock(&xprt->reserve_lock);
+	xid = (__force __be32)xprt->xid++;
+	spin_unlock(&xprt->reserve_lock);
+	return xid;
+}
+
+static void
+xprt_init_xid(struct rpc_xprt *xprt)
+{
+	xprt->xid = prandom_u32();
+}
+
+static void
+xprt_request_init(struct rpc_task *task)
+{
+	struct rpc_xprt *xprt = task->tk_xprt;
+	struct rpc_rqst	*req = task->tk_rqstp;
+
+	INIT_LIST_HEAD(&req->rq_list);
+	req->rq_timeout = task->tk_client->cl_timeout->to_initval;
+	req->rq_task	= task;
+	req->rq_xprt    = xprt;
+	req->rq_buffer  = NULL;
+	req->rq_xid	= xprt_alloc_xid(xprt);
+	req->rq_connect_cookie = xprt->connect_cookie - 1;
+	req->rq_bytes_sent = 0;
+	req->rq_snd_buf.len = 0;
+	req->rq_snd_buf.buflen = 0;
+	req->rq_rcv_buf.len = 0;
+	req->rq_rcv_buf.buflen = 0;
+	req->rq_release_snd_buf = NULL;
+	xprt_reset_majortimeo(req);
+	dprintk("RPC: %5u reserved req %p xid %08x\n", task->tk_pid,
+			req, ntohl(req->rq_xid));
+}
+
+static void
+xprt_do_reserve(struct rpc_xprt *xprt, struct rpc_task *task)
+{
+	xprt->ops->alloc_slot(xprt, task);
+	if (task->tk_rqstp != NULL)
+		xprt_request_init(task);
+}
+
 /**
  * xprt_reserve - allocate an RPC request slot
  * @task: RPC task requesting a slot allocation
@@ -1276,7 +1325,7 @@ void xprt_reserve(struct rpc_task *task)
 	task->tk_timeout = 0;
 	task->tk_status = -EAGAIN;
 	if (!xprt_throttle_congested(xprt, task))
-		xprt->ops->alloc_slot(xprt, task);
+		xprt_do_reserve(xprt, task);
 }
 
 /**
@@ -1298,45 +1347,7 @@ void xprt_retry_reserve(struct rpc_task *task)
 
 	task->tk_timeout = 0;
 	task->tk_status = -EAGAIN;
-	xprt->ops->alloc_slot(xprt, task);
-}
-
-static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt)
-{
-	__be32 xid;
-
-	spin_lock(&xprt->reserve_lock);
-	xid = (__force __be32)xprt->xid++;
-	spin_unlock(&xprt->reserve_lock);
-	return xid;
-}
-
-static inline void xprt_init_xid(struct rpc_xprt *xprt)
-{
-	xprt->xid = prandom_u32();
-}
-
-void xprt_request_init(struct rpc_task *task)
-{
-	struct rpc_xprt *xprt = task->tk_xprt;
-	struct rpc_rqst	*req = task->tk_rqstp;
-
-	INIT_LIST_HEAD(&req->rq_list);
-	req->rq_timeout = task->tk_client->cl_timeout->to_initval;
-	req->rq_task	= task;
-	req->rq_xprt    = xprt;
-	req->rq_buffer  = NULL;
-	req->rq_xid	= xprt_alloc_xid(xprt);
-	req->rq_connect_cookie = xprt->connect_cookie - 1;
-	req->rq_bytes_sent = 0;
-	req->rq_snd_buf.len = 0;
-	req->rq_snd_buf.buflen = 0;
-	req->rq_rcv_buf.len = 0;
-	req->rq_rcv_buf.buflen = 0;
-	req->rq_release_snd_buf = NULL;
-	xprt_reset_majortimeo(req);
-	dprintk("RPC: %5u reserved req %p xid %08x\n", task->tk_pid,
-			req, ntohl(req->rq_xid));
+	xprt_do_reserve(xprt, task);
 }
 
 /**