linux-kernel - Re: [PATCH 1/3] libata: add missing PM callbacks

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Message-ID: <20070306082212.GC2040@elf.ucw.cz>
Date:	Tue, 6 Mar 2007 09:22:12 +0100
From:	Pavel Machek <pavel@....cz>
To:	Tejun Heo <htejun@...il.com>
Cc:	Jeff Garzik <jeff@...zik.org>, linux-ide@...r.kernel.org,
	Alan <alan@...rguk.ukuu.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] libata: add missing PM callbacks

Hi!

> > Much complexity for little gain. Who is running _without_ CONFIG_PM
> > these days?
> 
> Embedded people, I guess.  The problem here is that if we are gonna
> support !CONFIG_PM configuration and try to reduce the kernel/module
> images size for such case, we end up sprinkling #ifdef's all over huge
> number of device drivers.

Ok, in separate mail I see you already did the work...

> If we determine to drop !CONFIG_PM configuration, I'm happy with that
> too but we need to determine something here.  Alternatives...
> 
> 1. drop !CONFIG_PM configuration
> 2. continue to sprinkle #ifdef's over device drivers
> 3. find out prettier way to mark PM functions

...of 3., and code is nicely generic and fairly simple. I thought it
would be too much work to implemente it, and it would get too messy.

Given that it is so simple, I believe 3. is the best option. We can
still do 1. in future if we feel like so...
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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