linux-kernel - Re: [RFT] x86 acpi: normalize segment descriptor register on resume

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Message-Id: <200807142210.43035.rjw@sisk.pl>
Date:	Mon, 14 Jul 2008 22:10:41 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Andy Lutomirski <luto@...ealbox.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Ingo Molnar <mingo@...e.hu>,
	public-kernel-testers-u79uwXL29TY76Z2rM5mHXA@...gmane.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@....cz>
Subject: Re: [RFT] x86 acpi: normalize segment descriptor register on resume

On Monday, 14 of July 2008, H. Peter Anvin wrote:
> Rafael J. Wysocki wrote:
> > 
> > If s3_bios depends on the (invalid) contents of the hidden part of any segment
> > register, it's just terminally broken.
> > 
> 
> Depending on it being in Big Real Mode isn't all that broken, however, 
> especially on laptops where the vendor has control over the system 
> BIOS/video BIOS.
> 
> Enabling BRM by default *shouldn't* break anything, so it might be what 
> we want to do anyway.

Agreed.
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