linux-kernel - Re: [PATCH] Make bootsector stub 16-bit-only (i386)

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Message-Id: <200705081427.08646.ak@suse.de>
Date:	Tue, 8 May 2007 14:27:08 +0200
From:	Andi Kleen <ak@...e.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander van Heukelum <heukelum@...lshack.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Make bootsector stub 16-bit-only (i386)

On Tuesday 08 May 2007 13:25, H. Peter Anvin wrote:
> Andrew Morton wrote:
> >>  	# Normalize the start address
> >> -	jmpl	$BOOTSEG, $start2
> >> +	jmpw	$BOOTSEG, $start2
> >
> > Sigh, another blow struck in the ongoing struggle between my Vaio and the
> > rest of the world.
> >
> > Stone-cold black-screen lockup immediately upon boot.
> >
> > Stock FC5 install, config at
> > http://userweb.kernel.org/~akpm/config-sony.txt
>
> Andrew, I'm seriously starting to think there is something fundamentally
> wrong with that test setup.

I agree. The patch above does not change any code in the running
kernel and is not even used in a normal kernel boot. Andrew,
can you please double check that?

> [*] On the other hand, as I discovered in the process,
> arch/i386/kernel/cpu/transmeta.c apparently gets miscompiled on my
> development system for top-of-Linus.  This is a Linux bug and not gcc's
> fault.  The following code:

You should have put that into a different mail (is there a electron shortage
somewhere now? @)  Ok, thanks for the well researched bug report.  Will fix in 
my tree.

-Andi

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