SUNRPC: create stubs for xprtsock init and cleanup

Over time we will want to add some specific init and cleanup logic for the
xprtsock implementation.  Add stub routines for initialization and exit
processing.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index faaf81e..d85fdde 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -138,6 +138,8 @@
 extern int register_rpc_pipefs(void);
 extern void unregister_rpc_pipefs(void);
 extern struct cache_detail ip_map_cache;
+extern int init_socket_xprt(void);
+extern void cleanup_socket_xprt(void);
 
 static int __init
 init_sunrpc(void)
@@ -155,6 +157,7 @@
 	rpc_proc_init();
 #endif
 	cache_register(&ip_map_cache);
+	init_socket_xprt();
 out:
 	return err;
 }
@@ -162,6 +165,7 @@
 static void __exit
 cleanup_sunrpc(void)
 {
+	cleanup_socket_xprt();
 	unregister_rpc_pipefs();
 	rpc_destroy_mempool();
 	if (cache_unregister(&ip_map_cache))
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index ad61b3e..70131c3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1502,3 +1502,21 @@
 
 	return xprt;
 }
+
+/**
+ * init_socket_xprt - stub
+ *
+ */
+int init_socket_xprt(void)
+{
+	return 0;
+}
+
+/**
+ * cleanup_socket_xprt - stub
+ *
+ */
+void cleanup_socket_xprt(void)
+{
+	return;
+}