From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] sfc: Convert the normal transmit complete
 path to dev_consume_skb_any()
Date: Tue, 09 Sep 2014 16:46:24 -0700 (PDT)
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From: Rick Jones <rick.jones2@hp.com>
Date: Tue, 09 Sep 2014 16:38:32 -0700

> But perhaps someone from SolarFlare can say why that was a const to
> begin with.

Probably to trap skb->x modifications after the SKB has been placed
in these entries, except for these explicit spots where the casts
are applied.