netdev - Re: [PATCH net-next v2] net: filter: constify detection of pkt_type

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Message-ID: <20140912160559.GA34038@its-macbook-pro.westell.com>
Date:	Fri, 12 Sep 2014 09:06:01 -0700
From:	Alexei Starovoitov <alexei.starovoitov@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>,
	Markos Chandras <markos.chandras@...tec.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	Denis Kirjanov <kda@...ux-powerpc.org>
Subject: Re: [PATCH net-next v2] net: filter: constify detection of
 pkt_type_offset

On Fri, Sep 12, 2014 at 02:04:43PM +0200, Hannes Frederic Sowa wrote:
> Currently we have 2 pkt_type_offset functions doing the same thing and
> spread across the architecture files. Remove those and replace them
> with a PKT_TYPE_OFFSET macro helper which gets the constant value from a
> zero sized sk_buff member right in front of the bitfield with offsetof.
> This new offset marker does not change size of struct sk_buff.
> 
> Cc: Eric Dumazet <eric.dumazet@...il.com>
> Cc: Markos Chandras <markos.chandras@...tec.com>
> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
> Cc: Daniel Borkmann <dborkman@...hat.com>
> Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>
> Signed-off-by: Denis Kirjanov <kda@...ux-powerpc.org>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> ---
> 
> v2) Incorporated Daniel's feedback. I first misinterpreted the feedback
>     as something not related to pkt_type_offset.

Thanks! It's a nice cleanup.

Acked-by: Alexei Starovoitov <ast@...mgrid.com>

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