tree d4e329fc83fd47331be454b916e4bf770c5371c4
parent 409f0a9014fe24d906ba21aaccff80eb7f7304da
author David S. Miller <davem@davemloft.net> 1234149853 -0800
committer David S. Miller <davem@davemloft.net> 1234149853 -0800

net: Increase default NET_SKB_PAD to 32.

Several devices need to insert some "pre headers" in front of the
main packet data when they transmit a packet.

Currently we allocate only 16 bytes of pad room and this ends up not
being enough for some types of hardware (NIU, usb-net, s390 qeth,
etc.)

So increase this to 32.

Note that drivers still need to check in their transmit routine
whether enough headroom exists, and if not use skb_realloc_headroom().
Tunneling, IPSEC, and other encapsulation methods can cause the
padding area to be used up.

Signed-off-by: David S. Miller <davem@davemloft.net>