--- zzzz-none-000/linux-4.4.271/include/net/netns/xfrm.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/netns/xfrm.h	2023-04-19 10:22:30.000000000 +0000
@@ -84,6 +84,8 @@
 	struct work_struct	flow_cache_gc_work;
 	struct work_struct	flow_cache_flush_work;
 	struct mutex		flow_flush_sem;
+	spinlock_t xfrm_event_lock;
+	struct list_head event_notifier_list;
 };
 
 #endif