[BUG][PATCH] boot failure Re: Linux 2.2.21pre4

From: Barry K. Nathan (barryn@pobox.com)
Date: Sat Mar 09 2002 - 08:29:23 EST


> 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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