netdev - Re: [PATCH][MIPS][7/7] AR7: ethernet

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Message-ID: <20070913113547.GC31940@linux-mips.org>
Date:	Thu, 13 Sep 2007 12:35:47 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Thiemo Seufer <ths@...workno.de>
Cc:	Matteo Croce <technoboy85@...il.com>, linux-mips@...ux-mips.org,
	Eugene Konev <ejka@...i.kspu.ru>, netdev@...r.kernel.org,
	davem@...emloft.net, kuznet@....inr.ac.ru, pekkas@...core.fi,
	jmorris@...ei.org, yoshfuji@...ux-ipv6.org, kaber@...eworks.de,
	openwrt-devel@...ts.openwrt.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeff Garzik <jgarzik@...ox.com>
Subject: Re: [PATCH][MIPS][7/7] AR7: ethernet

On Thu, Sep 13, 2007 at 02:42:46AM +0100, Thiemo Seufer wrote:

> > All struct members here are sized such that there is no padding needed, so
> > the packed attribute doesn't buy you anything - unless of course the
> > entire structure is missaligned but I don't see how that would be possible
> > in this driver so the __attribute__ ((packed)) should go - it result in
> > somwhat larger and slower code.
> 
> FWIW, a modern gcc will warn about such superfluous packed attributes,
> that's another reason to remove those.

I doubt it will in this case; the packed structure is dereferenced by a
pointer so no way for gcc to know the alignment.

  Ralf
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