--- zzzz-none-000/linux-4.4.271/net/bridge/br.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/net/bridge/br.c	2023-04-19 10:22:30.000000000 +0000
@@ -190,6 +190,7 @@
 	int err;
 
 	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+	BUILD_BUG_ON(sizeof(struct br_output_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
 
 	err = stp_proto_register(&br_stp_proto);
 	if (err < 0) {
@@ -223,6 +224,10 @@
 
 	brioctl_set(br_ioctl_deviceless_stub);
 
+	err = br_flood_rl_init();
+	if (err)
+		goto err_out6;
+
 #if IS_ENABLED(CONFIG_ATM_LANE)
 	br_fdb_test_addr_hook = br_fdb_test_addr;
 #endif
@@ -233,6 +238,8 @@
 
 	return 0;
 
+err_out6:
+	br_netlink_fini();
 err_out5:
 	unregister_switchdev_notifier(&br_switchdev_notifier);
 err_out4:
@@ -251,6 +258,7 @@
 static void __exit br_deinit(void)
 {
 	stp_proto_unregister(&br_stp_proto);
+	br_flood_rl_fini();
 	br_netlink_fini();
 	unregister_switchdev_notifier(&br_switchdev_notifier);
 	unregister_netdevice_notifier(&br_device_notifier);
@@ -266,6 +274,10 @@
 	br_fdb_fini();
 }
 
+/* Hook for bridge event notifications */
+br_notify_hook_t __rcu *br_notify_hook __read_mostly;
+EXPORT_SYMBOL_GPL(br_notify_hook);
+
 module_init(br_init)
 module_exit(br_deinit)
 MODULE_LICENSE("GPL");