linux-kernel - Re: [PATCH, x86]: Fix movq immediate operand constraints in uaccess

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Date:	Mon, 20 Jul 2009 22:15:41 +0200
From:	Uros Bizjak <ubizjak@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	x86@...nel.org
Subject: Re: [PATCH, x86]: Fix movq immediate operand constraints in uaccess_64.h

On 07/19/2009 06:06 PM, Uros Bizjak wrote:
> Hello!
>
> arch/x86/include/asm/uaccess_64.h uses wrong asm operand constraint 
> ("ir") for movq insn. Since movq sign-extends its immediate operand, 
> "er" constraint should be used instead.
>
> Attached patch changes all uses of __put_user_asm in uaccess_64.h to 
> use "er" when "q" insn suffix is involved.
>
> Patch was compile tested on x86_64 with defconfig.
>
> Uros.

Uh, missed signed-off line and Cc, so:

Signed-off-by: Uros Bizjak <ubizjak@...il.com>



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