netdev_has_upper_dev
!netdev_has_upper_dev(slave_dev, bond_dev)) {
if (netdev_has_upper_dev(dev, port_dev)) {
if (netdev_has_upper_dev(port_dev, dev)) {
bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
EXPORT_SYMBOL(netdev_has_upper_dev);