[PATCH v2 29/34] SUNRPC: Convert the xprt->sending queue back to an ordinary wait queue

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We no longer need priority semantics on the xprt->sending queue, because
the order in which tasks are sent is now dictated by their position in
the send queue.
Note that the backlog queue remains a priority queue, meaning that
slot resources are still managed in order of task priority.

Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
 net/sunrpc/xprt.c | 29 ++++++-----------------------
 1 file changed, 6 insertions(+), 23 deletions(-)

diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index ba9af25d14de..ebe5235c484b 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -181,7 +181,6 @@ EXPORT_SYMBOL_GPL(xprt_load_transport);
 int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task)
 {
 	struct rpc_rqst *req = task->tk_rqstp;
-	int priority;
 
 	if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) {
 		if (task == xprt->snd_task)
@@ -197,13 +196,7 @@ int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task)
 			task->tk_pid, xprt);
 	task->tk_timeout = 0;
 	task->tk_status = -EAGAIN;
-	if (req == NULL)
-		priority = RPC_PRIORITY_LOW;
-	else if (!req->rq_ntrans)
-		priority = RPC_PRIORITY_NORMAL;
-	else
-		priority = RPC_PRIORITY_HIGH;
-	rpc_sleep_on_priority(&xprt->sending, task, NULL, priority);
+	rpc_sleep_on(&xprt->sending, task, NULL);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xprt_reserve_xprt);
@@ -231,7 +224,6 @@ static void xprt_clear_locked(struct rpc_xprt *xprt)
 int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task)
 {
 	struct rpc_rqst *req = task->tk_rqstp;
-	int priority;
 
 	if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) {
 		if (task == xprt->snd_task)
@@ -251,13 +243,7 @@ int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task)
 	dprintk("RPC: %5u failed to lock transport %p\n", task->tk_pid, xprt);
 	task->tk_timeout = 0;
 	task->tk_status = -EAGAIN;
-	if (req == NULL)
-		priority = RPC_PRIORITY_LOW;
-	else if (!req->rq_ntrans)
-		priority = RPC_PRIORITY_NORMAL;
-	else
-		priority = RPC_PRIORITY_HIGH;
-	rpc_sleep_on_priority(&xprt->sending, task, NULL, priority);
+	rpc_sleep_on(&xprt->sending, task, NULL);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xprt_reserve_xprt_cong);
@@ -285,8 +271,7 @@ static void __xprt_lock_write_next(struct rpc_xprt *xprt)
 	if (test_and_set_bit(XPRT_LOCKED, &xprt->state))
 		return;
 
-	if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending,
-				__xprt_lock_write_func, xprt))
+	if (rpc_wake_up_first(&xprt->sending, __xprt_lock_write_func, xprt))
 		return;
 	xprt_clear_locked(xprt);
 }
@@ -297,8 +282,7 @@ static void __xprt_lock_write_next_cong(struct rpc_xprt *xprt)
 		return;
 	if (RPCXPRT_CONGESTED(xprt))
 		goto out_unlock;
-	if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending,
-				__xprt_lock_write_func, xprt))
+	if (rpc_wake_up_first(&xprt->sending, __xprt_lock_write_func, xprt))
 		return;
 out_unlock:
 	xprt_clear_locked(xprt);
@@ -495,8 +479,7 @@ void xprt_write_space(struct rpc_xprt *xprt)
 	if (xprt->snd_task) {
 		dprintk("RPC:       write space: waking waiting task on "
 				"xprt %p\n", xprt);
-		rpc_wake_up_queued_task_on_wq(xprtiod_workqueue,
-				&xprt->pending, xprt->snd_task);
+		rpc_wake_up_queued_task(&xprt->pending, xprt->snd_task);
 	}
 	spin_unlock_bh(&xprt->transport_lock);
 }
@@ -1596,7 +1579,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
 
 	rpc_init_wait_queue(&xprt->binding, "xprt_binding");
 	rpc_init_wait_queue(&xprt->pending, "xprt_pending");
-	rpc_init_priority_wait_queue(&xprt->sending, "xprt_sending");
+	rpc_init_wait_queue(&xprt->sending, "xprt_sending");
 	rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog");
 
 	xprt_init_xid(xprt);
-- 
2.17.1




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