IXGBE_TX_FLAGS_VLAN_SHIFT
vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
IXGBE_TX_FLAGS_VLAN_SHIFT;
IXGBE_TX_FLAGS_VLAN_SHIFT);
tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;