netdev_lower_get_next
void *netdev_lower_get_next(struct net_device *dev,
ldev = netdev_lower_get_next(dev, &(iter)); \
ldev = netdev_lower_get_next(dev, &(iter)))
EXPORT_SYMBOL(netdev_lower_get_next);
ndev = netdev_lower_get_next(ndev, &lower);