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Subject: [BUG][PATCH] boot failure Re: Linux 2.2.21pre4
To: alan@lxorguk.ukuu.org.uk (Alan Cox)
Date: Sat, 9 Mar 2002 05:29:23 -0800 (PST)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <E16jWBa-0008Nc-00@the-village.bc.nu> from "Alan Cox" at Mar 09, 2002 02:02:14 AM
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From: barryn@pobox.com (Barry K. Nathan)
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> Please save any 2.2 updates for 2.2.22pre from now on unless they are
> clear bug fixes. I hope to do a 2.2.21rc1 next
> 
> 2.2.21pre4
[snip]
> o	Fix MCE address reporting order, fix oops with	(Dave Jones)
> 	newer gcc due to bad asm constraints

Hmmm... I have a computer here that freezes at this point in the boot
process with 2.2.21-pre4:

...
CPU: L2 cache: 128K
Intel machine check architecture supported.

Reversing the following change to bluesmoke.c lets this computer boot
again like it does with 2.2.21-pre3. The computer in question has a 533MHz
Intel Celeron (the Pentium II-based kind).

-Barry K. Nathan <barryn@pobox.com>

diff -ruN linux-2.2.21-pre3/arch/i386/kernel/bluesmoke.c linux-2.2.21-pre4/arch/i386/kernel/bluesmoke.c
--- linux-2.2.21-pre3/arch/i386/kernel/bluesmoke.c	Sun Mar  3 23:20:11 2002
+++ linux-2.2.21-pre4/arch/i386/kernel/bluesmoke.c	Sat Mar  9 03:58:57 2002
@@ -165,7 +164,7 @@
 	if(l&(1<<8))
 		wrmsr(0x17b, 0xffffffff, 0xffffffff);
 	banks = l&0xff;
-	for(i=1;i<banks;i++)
+	for(i=0;i<banks;i++)
 	{
 		wrmsr(0x400+4*i, 0xffffffff, 0xffffffff); 
 	}
-
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