From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH][net-next] gianfar: Fix reported sent bytes to BQL for
 Tx timestamping
Date: Mon, 29 Apr 2013 08:59:53 -0700
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On Mon, 2013-04-29 at 18:52 +0300, Claudiu Manoil wrote:

> Interesting but non-trivial, I think. Is this allowed? I mean, doesn't
> the net stack overwrite this field?

Each layer is allowed to overwrite skb->cb[]

Some network drivers already do.