NETIF_VLAN_OFFLOAD_FEATURES
if ((netdev->features & NETIF_VLAN_OFFLOAD_FEATURES) ^
(features & NETIF_VLAN_OFFLOAD_FEATURES))
current_vlan_features = netdev->features & NETIF_VLAN_OFFLOAD_FEATURES;
requested_vlan_features = features & NETIF_VLAN_OFFLOAD_FEATURES;