[NETNS]: Add an empty netns_dccp structure on struct net.

According to the overall struct net design, it will be
filled with DCCP-related members.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/dccp.h b/include/net/netns/dccp.h
new file mode 100644
index 0000000..056e6ad
--- /dev/null
+++ b/include/net/netns/dccp.h
@@ -0,0 +1,7 @@
+#ifndef __NETNS_DCCP_H__
+#define __NETNS_DCCP_H__
+
+struct netns_dccp {
+};
+
+#endif