void skb_unlink(struct sk_buff *skb)
void skb_unlink(struct sk_buff *skb, struct sk_buff_head *list)
void skb_unlink(struct sk_buff *skb){	struct sk_buff_head *list = skb->list;	if (list) {		unsigned long flags;		spin_lock_irqsave(&list->lock, flags);		if (skb->list == list)			__skb_unlink(skb, skb->list);		spin_unlock_irqrestore(&list->lock, flags);	}}