__skb_queue_after
__skb_queue_after(head, insert, new);
__skb_queue_after(&agg->queue, iter, skb);
__skb_queue_after(queue, p_tail, p);
__skb_queue_after(pktq, pkt, pkt_pad);
__skb_queue_after(&priv->tx_queue, target_skb, skb);
__skb_queue_after(list, (struct sk_buff *)list, newsk);
__skb_queue_after(list, old, newsk);
__skb_queue_after(&sk->sk_write_queue, skb, buff);