commit 7bdd402706cf26bfef9050dfee3f229b7f33ee4f
author Eric Dumazet <eric.dumazet@gmail.com> Wed Mar 14 06:56:25 2012 +0000
committer David S. Miller <davem@davemloft.net> Fri Mar 16 02:01:05 2012 -0700
tree 4db4fac193e40f7a7d86a3ec072337b451af3477
parent c0ea452e422a1fc78ec8c639df64012d0b8dbb4a

net/usbnet: reserve headroom on rx skbs

network drivers should reserve some headroom on incoming skbs so that we
dont need expensive reallocations, eg forwarding packets in tunnels.

This NET_SKB_PAD padding is done in various helpers, like
__netdev_alloc_skb_ip_align() in this patch, combining NET_SKB_PAD and
NET_IP_ALIGN magic.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Oliver Neukum <oneukum@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>