linux-kernel - Re: [PATCH] Remove CONFIG_PM altogether, enable power management all the time

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Message-ID: <Pine.LNX.4.44L0.1102091507550.2050-100000@iolanthe.rowland.org>
Date:	Wed, 9 Feb 2011 15:09:42 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
cc:	Tim Bird <tim.bird@...sony.com>,
	"Rowand, Frank" <Frank_Rowand@...yusa.com>,
	Frank Rowand <frank.rowand@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Len Brown <len.brown@...el.com>,
	"linux-pm@...ts.linux-foundation.org" 
	<linux-pm@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"linux-embedded@...r.kernel.org" <linux-embedded@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] Remove CONFIG_PM altogether, enable power management
 all the time

On Wed, 9 Feb 2011, Mark Brown wrote:

> On Wed, Feb 09, 2011 at 11:53:52AM -0800, Tim Bird wrote:

> > I'm confused.  Do you plan to retain the option to
> > turn off PM features completely, or not?  I thought that's
> > what CONFIG_PM did today.
> 
> Raphael's patches do that in a much better way than my original patch,
> my original patch would have force CONFIG_PM on but still allowed all
> the PM features that it controls to be turned on and off individually.

Or to put it another way, if you enable any of CONFIG_PM_SUSPEND, 
CONFIG_PM_HIBERNATION, or CONFIG_PM_RUNTIME, then CONFIG_PM will 
automatically be turned on.  Otherwise it will automatically be turned 
off.

Alan Stern

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