netns xfrm: per-netns MIBs

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/mib.h b/include/net/netns/mib.h
index 10cb7c3..0b44112 100644
--- a/include/net/netns/mib.h
+++ b/include/net/netns/mib.h
@@ -20,6 +20,9 @@
 	DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
 	DEFINE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg_statistics);
 #endif
+#ifdef CONFIG_XFRM_STATISTICS
+	DEFINE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics);
+#endif
 };
 
 #endif