tun_notifier_block 3672 drivers/net/tun.c static struct notifier_block tun_notifier_block __read_mostly = { tun_notifier_block 3694 drivers/net/tun.c ret = register_netdevice_notifier(&tun_notifier_block); tun_notifier_block 3714 drivers/net/tun.c unregister_netdevice_notifier(&tun_notifier_block);