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ipv6: Make IP6CB(skb)->nhoff 16-bit.

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Even with jumbograms I cannot see any way in which we would need
to records a larger than 65535 valued next-header offset.

The maximum extension header length is (256 << 3) == 2048.
There are only a handful of extension headers specified which
we'd even accept (say 5 or 6), therefore the largest next-header
offset we'd ever have to contend with is something less than
say 16k.

Therefore make it a u16 instead of a u32.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2010-07-19 22:01:26 -07:00
parent 5ae482e01d
commit e7c38157c6
1 changed files with 1 additions and 1 deletions
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2
include/linux/ipv6.h
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@ -246,7 +246,7 @@ struct inet6_skb_parm {
__u16 srcrt;
__u16 dst1;
__u16 lastopt;
__u32 nhoff;
__u16 nhoff;
__u16 flags;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
__u16 dsthao;