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[SK_BUFF]: Introduce skb_reset_network_header(skb)

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For the common, open coded 'skb->nh.raw = skb->data' operation, so that we can
later turn skb->nh.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple case, next will handle the slightly more
"complex" cases.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-04-10 20:45:18 -07:00 • committed by David S. Miller
parent 57effc70a5
commit c1d2bbe1cd
47 changed files with 78 additions and 68 deletions
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6
net/packet/af_packet.c
View file

@ -401,14 +401,14 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock,
* notable one here. This should really be fixed at the driver level.
*/
skb_reserve(skb, LL_RESERVED_SPACE(dev));
skb->nh.raw = skb->data;
skb_reset_network_header(skb);
/* Try to align data part correctly */
if (dev->hard_header) {
skb->data -= dev->hard_header_len;
skb->tail -= dev->hard_header_len;
if (len < dev->hard_header_len)
skb->nh.raw = skb->data;
skb_reset_network_header(skb);
}
/* Returns -EFAULT on error */
@ -768,7 +768,7 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
goto out_unlock;
skb_reserve(skb, LL_RESERVED_SPACE(dev));
skb->nh.raw = skb->data;
skb_reset_network_header(skb);
if (dev->hard_header) {
int res;