sunrpc: Make the ip_map_cache be per-net

Everything that is required for that already exists:
* the per-net cache registration with respective proc entries
* the context (struct net) is available in all the users

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h
index e52ce89..d013bf2 100644
--- a/net/sunrpc/netns.h
+++ b/net/sunrpc/netns.h
@@ -4,10 +4,16 @@
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 
+struct cache_detail;
+
 struct sunrpc_net {
 	struct proc_dir_entry *proc_net_rpc;
+	struct cache_detail *ip_map_cache;
 };
 
 extern int sunrpc_net_id;
 
+int ip_map_cache_create(struct net *);
+void ip_map_cache_destroy(struct net *);
+
 #endif