FBNIC_XMIT_CB_TS
FBNIC_XMIT_CB(skb)->flags |= FBNIC_XMIT_CB_TS;
if (unlikely(FBNIC_XMIT_CB(skb)->flags & FBNIC_XMIT_CB_TS)) {
} while (!(FBNIC_XMIT_CB(skb)->flags & FBNIC_XMIT_CB_TS));
FBNIC_XMIT_CB(skb)->flags &= ~FBNIC_XMIT_CB_TS;