linux-kernel - Re: [Q] x86

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Message-ID: <86802c440802230044sbfc909t656aadf5729b31c2@mail.gmail.com>
Date:	Sat, 23 Feb 2008 00:44:49 -0800
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Cyrill Gorcunov" <gorcunov@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"Sam Ravnborg" <sam@...nborg.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Q] x86 - boot/header.S

On Sat, Feb 23, 2008 at 12:20 AM, Cyrill Gorcunov <gorcunov@...il.com> wrote:
> Hi Peter, Sam,
>
>  could you take a look on x86/boot/header.S:280 please?
>
>  # Zero the bss
>         movw    $__bss_start, %di
>         movw    $_end+3, %cx
>         xorl    %eax, %eax
>         subw    %di, %cx
>         shrw    $2, %cx
>         rep; stosl
>
>  I wonder why is $_end there instead of $__bss_stop?
>  Well, accroding to vmlinux_32.lsd both _end and __bss_stop
>  are the same BUT __bss_stop is more convenient methink.
>  Would it be usefull to change?

we should have head32.c like head64.c
and x86_32_start_kernel.

Eric's patch long time ago...

YH
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