--- zzzz-none-000/linux-4.4.271/include/net/netns/conntrack.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/netns/conntrack.h	2023-04-19 10:22:30.000000000 +0000
@@ -100,7 +100,11 @@
 	struct hlist_head	*expect_hash;
 	struct ct_pcpu __percpu *pcpu_lists;
 	struct ip_conntrack_stat __percpu *stat;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+	struct atomic_notifier_head nf_conntrack_chain;
+#else
 	struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
+#endif
 	struct nf_exp_event_notifier __rcu *nf_expect_event_cb;
 	struct nf_ip_net	nf_ct_proto;
 #if defined(CONFIG_NF_CONNTRACK_LABELS)