linux-kernel - Re: [patch 3/3] clockevents: Fix resume logic

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Message-Id: <200705092036.20953.rjw@sisk.pl>
Date:	Wed, 9 May 2007 20:36:20 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	tglx@...utronix.de
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>, linux-acpi@...r.kernel.org
Subject: Re: [patch 3/3] clockevents: Fix resume logic - updated version

On Wednesday, 9 May 2007 19:15, Thomas Gleixner wrote:
> On Wed, 2007-05-09 at 19:09 +0200, Rafael J. Wysocki wrote:
> > > > Well, where is unregister_time_interpolator() called from?
> > > 
> > > # grep -rn unregister_time_interpolator .
> > > ./kernel/timer.c:1893:unregister_time_interpolator(struct time_interpolator *ti)
> > > ./include/linux/timex.h:270:extern void unregister_time_interpolator(struct time_interpolator *);
> > > 
> > > I don't see a caller. i386 does not use time interpolator anyway.
> > > 
> > > # find -iname Kconfig | xargs grep TIME_INTERPOLATION
> > > ./arch/sparc64/Kconfig:37:config TIME_INTERPOLATION
> > > ./arch/ia64/Kconfig:60:config TIME_INTERPOLATION
> > 
> > But clocksource_resume() has no other caller, AFAICS ...
> 
> Eeep ?
> 
> clocksource_resume is called from timekeeping_resume()
> 
> timestatic int timekeeping_resume(struct sys_device *dev)
> {
>         unsigned long flags;
>         unsigned long now = read_persistent_clock();
> 
>         clocksource_resume();
> ....
> }
> 
> keeping_resume() called via the sysdev resume 
> 
> static struct sysdev_class timekeeping_sysclass = {
>         .resume         = timekeeping_resume,
>         .suspend        = timekeeping_suspend,
>         set_kset_name("timekeeping"),
> };

Well, apparently, not in -mm2:

rafael@...ercik:~/src/mm/linux-2.6.21-mm2> grep -r -I -l 'timekeeping_resume' *
kernel/time/timekeeping.c
rafael@...ercik:~/src/mm/linux-2.6.21-mm2> grep clocksource_resume kernel/time/timekeeping.c
rafael@...ercik:~/src/mm/linux-2.6.21-mm2>

Hmm?

Rafael
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