netns xfrm: per-netns xfrm_state_byspi hash

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
index bfcd5a3..b05ca3f 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -15,6 +15,7 @@
 	 */
 	struct hlist_head	*state_bydst;
 	struct hlist_head	*state_bysrc;
+	struct hlist_head	*state_byspi;
 };
 
 #endif