linux-kernel - Re: [PATCH] Fix triplefault on x86-64 bootup

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Message-ID: <20070812104606.GA5871@martell.zuzino.mipt.ru>
Date:	Sun, 12 Aug 2007 14:46:06 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Petr Vandrovec <petr@...drovec.name>
Cc:	ak@...e.de, discuss@...-64.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] Fix triplefault on x86-64 bootup

On Sun, Aug 12, 2007 at 10:12:52AM +0200, Petr Vandrovec wrote:
> --- a/arch/x86_64/lib/memcpy.S
> +++ b/arch/x86_64/lib/memcpy.S
> @@ -124,6 +124,8 @@ ENDPROC(__memcpy)
>  	.quad memcpy
>  	.quad 1b
>  	.byte X86_FEATURE_REP_GOOD
> -	.byte .Lfinal - memcpy
> +	/* Replace only beginning, memcpy is used to apply alternatives, so it
> +	 * is silly to overwrite itself with nops - reboot is only outcome... */
> +	.byte 2b - 1b
>  	.byte 2b - 1b
>  	.previous

Thanks, this fixes E6400 reboots on bootup here.

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