linux-kernel - Re: [PATCH] i386: always clear bss

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Message-ID: <463BBEEE.3000903@zytor.com>
Date:	Fri, 04 May 2007 16:17:02 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i386: always clear bss

Eric W. Biederman wrote:
> 
> My notes show 0x5c reserved for additional apm_bios_info, although
> of the top of my head I don't know how realistic that is.
> 
> 0x1e4 does look available.
> 
> It has been a long time since I made that choice, and I do see that
> looking at struct screen_info I did remember to document that I was
> using 0x3c, even in your structure.
> 
> It is all internal to our boot process and external code isn't going
> to use it so we can change it if we feel like.
> 

I don't see the actual instruction that does that anywhere in my tree,
which was branched from Andi's "for-linus" git tree, but I have reserved
0x1e4 for that purpose as "scratch".

	-hpa
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