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

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Message-ID: <Pine.LNX.4.44L0.0705281155270.22682-100000@netrider.rowland.org>
Date:	Mon, 28 May 2007 11:56:32 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
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 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?

Alan Stern

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