linux-kernel - Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing the packed attribute

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Message-Id: <201106202207.23104.arnd@arndb.de>
Date:	Mon, 20 Jun 2011 22:07:22 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Alexander Holler <holler@...oftware.de>
Cc:	Nicolas Pitre <nico@...xnic.net>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	gregkh@...e.de, lkml <linux-kernel@...r.kernel.org>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing the packed attribute

On Monday 20 June 2011 19:39:34 Alexander Holler wrote:
> That packed without an additional aligned() caused errors on ARM with 
> gcc 4.6 is another problem which got (currently) fixed by removing packed.

Packed caused errors because it is *wrong*. The code as it was used undefined
behavior in the language.

> But this introduces imho doubts and uncertainty about if padding bytes 
> could be between the members, therefore I would prefer to use packed 
> with aligned instead of removing the packed.

Packing was never an issue here, please stop talking about it.

	Arnd
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