From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] don't compare skb->network_header with
 skb->tail
Date: Sun, 10 Mar 2013 16:52:28 -0400 (EDT)
Message-ID: <20130310.165228.391887733059465336.davem@davemloft.net>
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Cc: netdev@vger.kernel.org, stephen@networkplumber.org,
	zhiguo.hong@emc.com
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From: Hong Zhiguo <honkiko@gmail.com>
Date: Sun, 10 Mar 2013 16:42:07 +0800

> in the case of NET_SKBUFF_DATA_USES_OFFSET(on 64-bit arch),
> skb->network_header is just offset over skb->head.
> 
> Signed-off-by: Hong Zhiguo <honkiko@gmail.com>

So is skb->tail, so there is no problem.