linux-kernel - Re: [PATCH] fix i486 boot failure due to stale %ds

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Date:	Sun, 4 Nov 2007 20:38:33 +0100 (MET)
From:	Mikael Pettersson <mikpe@...uu.se>
To:	hpa@...or.com, mikpe@...uu.se
Cc:	linux-kernel@...r.kernel.org, mingo@...hat.com, tglx@...utronix.de
Subject: Re: [PATCH] fix i486 boot failure due to stale %ds

On Sun, 04 Nov 2007 10:29:34 -0800, H. Peter Anvin wrote:
>Could you send me your /proc/cpuinfo?

Sure. It's a 100Mhz Intel 486 DX4:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 4
model		: 8
model name	: 486 DX/4
stepping	: 0
cache size	: 0 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu vme
bogomips	: 49.66
clflush size	: 32

>Also, I would be very interested if you could try out this patch:
...
>Urk, -ENOTAWAKEYET.  Try *THIS* patch, please.

First patch didn't build. Second patch builds and boots Ok.

So this means the 486 DX4 has a buggy mov to %cr0?

/Mikael
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