SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqst

It seems strange to maintain stats for bytes_sent in one structure, and
bytes received in another. Try to assemble all the RPC request-related
stats in struct rpc_rqst

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8986b1b..65fe2e4 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -780,7 +780,7 @@
 	struct rpc_rqst *req = task->tk_rqstp;
 	struct rpc_rtt *rtt = task->tk_client->cl_rtt;
 	unsigned timer = task->tk_msg.rpc_proc->p_timer;
-	long m = usecs_to_jiffies(ktime_to_us(task->tk_rtt));
+	long m = usecs_to_jiffies(ktime_to_us(req->rq_rtt));
 
 	if (timer) {
 		if (req->rq_ntrans == 1)
@@ -805,7 +805,7 @@
 			task->tk_pid, ntohl(req->rq_xid), copied);
 
 	xprt->stat.recvs++;
-	task->tk_rtt = ktime_sub(ktime_get(), req->rq_xtime);
+	req->rq_rtt = ktime_sub(ktime_get(), req->rq_xtime);
 	if (xprt->ops->timer != NULL)
 		xprt_update_rtt(task);