linux-kernel - Re: [linux-pm] Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

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Date:	Fri, 27 Apr 2007 12:09:17 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Nick Piggin <npiggin@...e.de>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Ingo Molnar <mingo@...e.hu>, Pavel Machek <pavel@....cz>,
	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org,
	Con Kolivas <kernel@...ivas.org>,
	suspend2-devel@...ts.suspend2.net,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [linux-pm] Re: suspend2 merge (was Re: [Suspend2-devel] Re:
	CFS and suspend2: hang in atomic copy)

On Fri, 2007-04-27 at 11:41 +0200, Johannes Berg wrote:

> No, because acpi doesn't know at build time whether it can actually do
> S4 or not.

Actually, you could probably do it by making some weak symbol for it
that only ACPI overrides, and then check in the ACPI code if S4 is
possible, otherwise somehow invoke the old symbol or copy the code or
something. Seems a bit more fragile though.

johannes

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