linux-kernel - Re: [PATCH] AUX_DEVICE_INFO is one byte long, use 'movb'

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Message-Id: <200608010150.40529.ak@suse.de>
Date:	Tue, 1 Aug 2006 01:50:40 +0200
From:	Andi Kleen <ak@...e.de>
To:	Diego Calleja <diegocg@...il.com>
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] AUX_DEVICE_INFO is one byte long, use 'movb'

On Tuesday 01 August 2006 01:47, Diego Calleja wrote:
> Bugzilla #6552 says:
> 
> "In arch/i386/boot/setup.S, movw is used instead of movb for PS/2 mouse
> information, although it is unsigned char. This does not harm, because
> the jmp instruction overwritten by movw is used before executing movw,
> and never be used again"
> 
> I've no idea if this is a real bug or how it gets fixed, so I'm submitting
> it for review instead of letting it die of boredom in bugzilla. Aditionally
> to i386, I've changed x86-64, which mirrors the same code.
> 
> Credits to Yoshinori K. Okuji, who found the problem and suggested a fix.

Queued thanks.

-Andi
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