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

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Message-ID: <20070306080509.GA2040@elf.ucw.cz>
Date:	Tue, 6 Mar 2007 09:05:09 +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!

> [cc'ing Pavel and linux-kernel, hello]
> 
> Original thread can be read from
> 
>   http://thread.gmane.org/gmane.linux.ide/16475
> 
> Jeff Garzik wrote:
> > Tejun Heo wrote:
> >> Some LLDs were missing scsi device PM callbacks while having host/port
> >> suspend support.  Add missing ones.
> >>
> >> Signed-off-by: Tejun Heo <htejun@...il.com>
> > 
> > applied 1-3, though I agree with Alan that a non-ifdef solution should
> > be sought (by the PM & PCI people?), where possible
> 
> Agreed, CONFIG_PM ifdefs are all over low level drivers, libata or not,
> and ugly as hell.  Maybe use separate section, mark functions with
> __power and drop them at link time is a better idea.  With linker
> tricks, we can make references to __power symbols NULL.  How does it sound?

Much complexity for little gain. Who is running _without_ CONFIG_PM
these days?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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