linux-kernel - Re: [RFC][PATCH -mm 1/3] PM: Hibernation and suspend notifiers

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Message-Id: <200705281929.38259.rjw@sisk.pl>
Date:	Mon, 28 May 2007 19:29:37 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Pavel Machek <pavel@....cz>, Oliver Neukum <oliver@...kum.org>
Subject: Re: [RFC][PATCH -mm 1/3] PM: Hibernation and suspend notifiers

On Monday, 28 May 2007 17:56, Alan Stern wrote:
> On Sun, 27 May 2007, Rafael J. Wysocki wrote:
> 
> > From: Rafael J. Wysocki <rjw@...k.pl>
> > 
> > Make it possible to register hibernation and suspend notifiers, so that
> > subsystems can perform hibernation-related or suspend-related operations that
> > should not be carried out by device drivers' .suspend() and .resume() routines.
> 
> > +static DEFINE_MUTEX(pm_notifier_lock);
> > +
> > +static RAW_NOTIFIER_HEAD(pm_chain);
> 
> Is there any particular reason you chose to use a RAW_NOTIFIER_HEAD 
> with an explicit mutex instead of using a BLOCKING_NOTIFIER_HEAD?

Hmm, not really.  I based it on the CPU hotplug notifiers, actually.

I'll see if I can use BLOCKING_NOTIFIER_HEAD.

Greetings,
Rafael
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