SUNRPC: Remove rpcb_getport_sync()

Clean up: rpcb_getport_sync() has no more users, so remove it.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/clnt.h

@@ -137,7 +137,6 @@ int		rpcb_register(u32, u32, int, unsigned short);
 int		rpcb_v4_register(const u32 program, const u32 version,
 				 const struct sockaddr *address,
 				 const char *netid);
-int		rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
 void		rpcb_getport_async(struct rpc_task *);
 
 void		rpc_call_start(struct rpc_task *);

net/sunrpc/rpcb_clnt.c

@@ -475,57 +475,6 @@ int rpcb_v4_register(const u32 program, const u32 version,
 	return -EAFNOSUPPORT;
 }
 
-/**
- * rpcb_getport_sync - obtain the port for an RPC service on a given host
- * @sin: address of remote peer
- * @prog: RPC program number to bind
- * @vers: RPC version number to bind
- * @prot: transport protocol to use to make this request
- *
- * Return value is the requested advertised port number,
- * or a negative errno value.
- *
- * Called from outside the RPC client in a synchronous task context.
- * Uses default timeout parameters specified by underlying transport.
- *
- * XXX: Needs to support IPv6
- */
-int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
-{
-	struct rpcbind_args map = {
-		.r_prog		= prog,
-		.r_vers		= vers,
-		.r_prot		= prot,
-		.r_port		= 0,
-	};
-	struct rpc_message msg = {
-		.rpc_proc	= &rpcb_procedures2[RPCBPROC_GETPORT],
-		.rpc_argp	= &map,
-		.rpc_resp	= &map,
-	};
-	struct rpc_clnt	*rpcb_clnt;
-	int status;
-
-	dprintk("RPC:       %s(%pI4, %u, %u, %d)\n",
-		__func__, &sin->sin_addr.s_addr, prog, vers, prot);
-
-	rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
-				sizeof(*sin), prot, RPCBVERS_2);
-	if (IS_ERR(rpcb_clnt))
-		return PTR_ERR(rpcb_clnt);
-
-	status = rpc_call_sync(rpcb_clnt, &msg, 0);
-	rpc_shutdown_client(rpcb_clnt);
-
-	if (status >= 0) {
-		if (map.r_port != 0)
-			return map.r_port;
-		status = -EACCES;
-	}
-	return status;
-}
-EXPORT_SYMBOL_GPL(rpcb_getport_sync);
-
 static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
 {
 	struct rpc_message msg = {