void skb_insert(struct sk_buff *old, struct sk_buff *newsk)
void skb_insert(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list)
void skb_insert(struct sk_buff *old, struct sk_buff *newsk){	unsigned long flags;	spin_lock_irqsave(&old->list->lock, flags);	__skb_insert(newsk, old->prev, old, old->list);	spin_unlock_irqrestore(&old->list->lock, flags);}