--- zzzz-none-000/linux-3.10.107/net/bridge/br_notify.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/net/bridge/br_notify.c	2021-11-10 11:53:56.000000000 +0000
@@ -31,7 +31,16 @@
  */
 static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
 {
+#if 0
+	/* AVM: not present in 2.6.32: added around 3.10
+	 *
+	 * commit:
+	 * 351638e7deeed2ec8ce451b53d33921b3da68f83 net: pass info struct via netdevice notifier
+	 */
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+#else
 	struct net_device *dev = ptr;
+#endif
 	struct net_bridge_port *p;
 	struct net_bridge *br;
 	bool changed_addr;
@@ -102,6 +111,17 @@
 	case NETDEV_PRE_TYPE_CHANGE:
 		/* Forbid underlaying device to change its type. */
 		return NOTIFY_BAD;
+#if 0
+	/* AVM: not present in 2.6.32, added around 3.11
+	 *
+	 * commit:
+	 * 4aa5dee4d9997879adff858514844efab5a15a01 net: convert resend IGMP to notifier event
+	 */
+	case NETDEV_RESEND_IGMP:
+		/* Propagate to master device */
+		call_netdevice_notifiers(event, br->dev);
+		break;
+#endif
 	}
 
 	/* Events that may cause spanning tree to refresh */