netns xfrm: per-netns xfrm_state_hmask

Since hashtables are per-netns, they can be independently resized.

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 b05ca3f..dbbc0e9 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -16,6 +16,7 @@
 	struct hlist_head	*state_bydst;
 	struct hlist_head	*state_bysrc;
 	struct hlist_head	*state_byspi;
+	unsigned int		state_hmask;
 };
 
 #endif