____netdev_has_upper_dev 6453 net/core/dev.c return netdev_walk_all_upper_dev_rcu(dev, ____netdev_has_upper_dev, ____netdev_has_upper_dev 6471 net/core/dev.c return !!netdev_walk_all_upper_dev_rcu(dev, ____netdev_has_upper_dev, ____netdev_has_upper_dev 6716 net/core/dev.c return __netdev_walk_all_upper_dev(dev, ____netdev_has_upper_dev,