static inline void net_timestamp_set(struct sk_buff *skb)
{
	if (atomic_read(&netstamp_needed))
		__net_timestamp(skb);
	else
		skb->tstamp.tv64 = 0;
}
static inline void net_timestamp_set(struct sk_buff *skb)
{
	if (atomic_read(&netstamp_needed))
		__net_timestamp(skb);
	else
		skb->tstamp.tv64 = 0;
}