linux-kernel - Re: [RFC] Plan to get rid of all legacy PM handling

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Date:	Sun, 17 Jun 2012 16:49:40 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [RFC] Plan to get rid of all legacy PM handling

On Sun, Jun 17, 2012 at 11:10:49PM +0200, Rafael J. Wysocki wrote:
> Hi all,
> 
> I have a plan to replace all of the legacy device PM callbacks throughout
> the kernel with PM handling based on struct dev_pm_ops objects.  Ultimately,
> that should make it possible to remove the legacy hooks from struct bus_type
> and struct device_driver and to siplify the PM core and some bus types
> (most importantly PCI) quite a bit.
> 
> I'm going to start with platform drivers that should be the most
> straightforward to convert and when they all have been dealt with it
> should be possible to drop the platform bus type's PM callbacks entirely.
> Next, I'm going to take care of the bus types that only define PM callbacks
> to call drivers' callbacks, which is completely unnecessary after some PM
> core changes that went in during the 3.4 development cycle.  Finally, I will
> be looking at PCI drivers.
> 
> The task is huge, but I've done similar things already, so it's nothing new
> to me.  So, if you're a maintainer of code that contains legacy PM handling,
> please be prepared to see some patches from me in a not-too-distant-future.

Nice, that work is great to see have happen, thanks for taking this on,
it's much needed.

greg k-h
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