netns xfrm: per-netns xfrm_policy_byidx 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 6648924..5cd7d06 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -27,6 +27,7 @@
 	wait_queue_head_t	km_waitq;
 
 	struct list_head	policy_all;
+	struct hlist_head	*policy_byidx;
 };
 
 #endif