[PATCH] RPC: remove xprt->nocong

 Get rid of the "xprt->nocong" variable.

 Test-plan:
 Use WAN simulation to cause sporadic bursty packet loss with UDP mounts.
 Look for significant regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/lockd/host.c

@@ -188,7 +188,6 @@ nlm_bind_host(struct nlm_host *host)
 			goto forgetit;
 
 		xprt_set_timeout(&xprt->timeout, 5, nlmsvc_timeout);
-		xprt->nocong = 1;	/* No congestion control for NLM */
 		xprt->resvport = 1;	/* NLM requires a reserved port */
 
 		/* Existing NLM servers accept AUTH_UNIX only */

include/linux/sunrpc/xprt.h

@@ -172,7 +172,6 @@ struct rpc_xprt {
 	unsigned int		max_reqs;	/* total slots */
 	unsigned long		state;		/* transport state */
 	unsigned char		shutdown   : 1,	/* being shut down */
-				nocong	   : 1,	/* no congestion control */
 				resvport   : 1; /* use a reserved port */
 
 	/*

net/sunrpc/xprtsock.c

@@ -1100,7 +1100,6 @@ int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
 	xprt->prot = IPPROTO_UDP;
 	xprt->port = XS_MAX_RESVPORT;
 	xprt->tsh_size = 0;
-	xprt->nocong = 0;
 	xprt->cwnd = RPC_INITCWND;
 	xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
 	/* XXX: header size can vary due to auth type, IPv6, etc. */
@@ -1140,7 +1139,6 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
 	xprt->prot = IPPROTO_TCP;
 	xprt->port = XS_MAX_RESVPORT;
 	xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
-	xprt->nocong = 1;
 	xprt->cwnd = RPC_MAXCWND(xprt);
 	xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
 	xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;