linux-kernel - Re: [PATCH 19/19] PM: Add empty suspend/resume device irq functions

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Message-ID: <20090612113218.GB6355@osiris.boeblingen.de.ibm.com>
Date:	Fri, 12 Jun 2009 13:32:18 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux PM List <linux-pm@...ts.linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Magnus Damm <damm@...l.co.jp>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Sergio Luis <sergio@...ces.uece.br>,
	Lauro Salmito <laurosalmito@...il.com>,
	Jaswinder Singh Rajput <jaswinder@...nel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Nigel Cunningham <nigel@...onice.net>
Subject: Re: [PATCH 19/19] PM: Add empty suspend/resume device irq functions

On Fri, Jun 12, 2009 at 01:13:17PM +0200, Pavel Machek wrote:
> On Thu 2009-06-11 22:42:09, Rafael J. Wysocki wrote:
> > From: Heiko Carstens <heiko.carstens@...ibm.com>
> > 
> > git commit 0a0c5168 "PM: Introduce functions for suspending and resuming
> > device interrupts" introduced some helper functions. However these
> > functions are only available for architectures which support
> > GENERIC_HARDIRQS.
> 
> I believe architectures that do not use GENERIC_HARDIRQs should just
> provide the empty functions themselves.
> 
> If we want to help them, perhaps few attribute((weak)) functions in
> the core are the way to go...

We can still do that when there actually is an architecture that doesn't
support GENERIC_HARDIRQs _and_ needs non-empty functions.
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