linux-kernel - Re: [ANNOUNCE] 3.4.41-rt55-feat1

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Date:	Thu, 25 Apr 2013 14:48:56 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Tim Sander <tim.sander@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	RT <linux-rt-users@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Carsten Emde <C.Emde@...dl.org>, John Kacur <jkacur@...hat.com>
Subject: Re: [ANNOUNCE] 3.4.41-rt55-feat1

On Thu, 2013-04-25 at 08:43 -0400, Steven Rostedt wrote: 
> On Thu, 2013-04-25 at 14:36 +0200, Mike Galbraith wrote:
> > On Thu, 2013-04-25 at 14:32 +0200, Sebastian Andrzej Siewior wrote: 
> > > On 04/25/2013 01:14 PM, Tim Sander wrote:
> > > > Hi 
> > > > 
> > > > I just wanted to test this release but it fails to compile with the the 
> > > > following error:
> > > > 
> > > > kernel/hrtimer.c: In function '__hrtimer_start_range_ns':
> > > > kernel/hrtimer.c:1045:7: error: implicit declaration of function 
> > > > 'hrtimer_rt_defer'
> > > > kernel/hrtimer.c: At top level:
> > > > kernel/hrtimer.c:1416:12: error: static declaration of 'hrtimer_rt_defer' 
> > > > follows non-static declaration
> > > > kernel/hrtimer.c:1045:10: note: previous implicit declaration of 
> > > > 'hrtimer_rt_defer' was here
> > > > 
> > > > The kernelconfig is attached.
> > > 
> > > You do not have CONFIG_HIGH_RES_TIMERS defined. Is this on purpose?
> > 
> > git@...ge:~/linux-2.6> ls -1 arch/arm/configs|wc -l
> > 122
> > git@...ge:~/linux-2.6> grep -IR CONFIG_HIGH_RES_TIMERS arch/arm/configs|wc -l
> > 31
> > 
> > Oh.  Sniff, poor little things.
> > 
> > hrtimer: fix hrtimer free zone build bug
> 
> Perhaps the better solution is to select HIGH_RES_TIMERS when
> PREEMPT_RT_FULL is selected?

If they have support, most definitely.  I got the impression lots of ARM
boxen are impoverished.. why else would they not have it already set?

-Mike


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