netfilter: netns nf_conntrack: per-netns conntrack count

Sysctls and proc files are stubbed to init_net's one. This is temporary.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 82d80b8..edf8471 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -1,6 +1,9 @@
 #ifndef __NETNS_CONNTRACK_H
 #define __NETNS_CONNTRACK_H
 
+#include <asm/atomic.h>
+
 struct netns_ct {
+	atomic_t		count;
 };
 #endif