linux-kernel - Re: [PATCH] x86: Use helper in fault

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Date:	Tue, 18 Dec 2007 12:19:08 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Harvey Harrison <harvey.harrison@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86: Use helper in fault_64.c


* Harvey Harrison <harvey.harrison@...il.com> wrote:

> Use the fixup_exception() helper in fault_64.c

thanks, applied.

> This is only appropriate if CONFIG_PNP_BIOS cannot be set on X86_64, 
> which looks to be the case, but needs confirmation.

yeah, that seems to be the case:

in drivers/pnp/pnpbios/Kconfig:

 config PNPBIOS
 ...
         depends on ISA && X86 && EXPERIMENTAL

in arch/x86/Kconfig:

 if X86_32
 config ISA

it seems the PNPBIOS has not infested the 64-bit world, so we wont ever 
see this with a 64-bit kernel:

                extern u32 pnp_bios_is_utter_crap;
                pnp_bios_is_utter_crap = 1;
                printk(KERN_CRIT "PNPBIOS fault.. attempting recovery.\n");

	Ingo
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