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[NET]: Store skb->timestamp as offset to a base timestamp

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Reduces skb size by 8 bytes on 64-bit.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2005-08-14 17:24:31 -07:00
committed by David S. Miller
parent 25ed891019
commit a61bbcf28a
39 changed files with 172 additions and 88 deletions
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28
net/core/dev.c
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@@ -1009,13 +1009,22 @@ void net_disable_timestamp(void)
atomic_dec(&netstamp_needed);
}
static inline void net_timestamp(struct timeval *stamp)
void __net_timestamp(struct sk_buff *skb)
{
struct timeval tv;
do_gettimeofday(&tv);
skb_set_timestamp(skb, &tv);
}
EXPORT_SYMBOL(__net_timestamp);
static inline void net_timestamp(struct sk_buff *skb)
{
if (atomic_read(&netstamp_needed))
do_gettimeofday(stamp);
__net_timestamp(skb);
else {
stamp->tv_sec = 0;
stamp->tv_usec = 0;
skb->tstamp.off_sec = 0;
skb->tstamp.off_usec = 0;
}
}
@@ -1027,7 +1036,8 @@ static inline void net_timestamp(struct timeval *stamp)
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
{
struct packet_type *ptype;
net_timestamp(&skb->stamp);
net_timestamp(skb);
rcu_read_lock();
list_for_each_entry_rcu(ptype, &ptype_all, list) {
@@ -1379,8 +1389,8 @@ int netif_rx(struct sk_buff *skb)
if (netpoll_rx(skb))
return NET_RX_DROP;
if (!skb->stamp.tv_sec)
net_timestamp(&skb->stamp);
if (!skb->tstamp.off_sec)
net_timestamp(skb);
/*
* The code is rearranged so that the path is the most
@@ -1566,8 +1576,8 @@ int netif_receive_skb(struct sk_buff *skb)
if (skb->dev->poll && netpoll_rx(skb))
return NET_RX_DROP;
if (!skb->stamp.tv_sec)
net_timestamp(&skb->stamp);
if (!skb->tstamp.off_sec)
net_timestamp(skb);
if (!skb->input_dev)
skb->input_dev = skb->dev;