netif_reduces_vlan_mtu 147 net/8021q/vlan_dev.c if (netif_reduces_vlan_mtu(real_dev)) netif_reduces_vlan_mtu 178 net/8021q/vlan_netlink.c max_mtu = netif_reduces_vlan_mtu(real_dev) ? real_dev->mtu - VLAN_HLEN :