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

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Message-ID: <1366893374.6139.5.camel@marge.simpson.net>
Date:	Thu, 25 Apr 2013 14:36:14 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	Tim Sander <tim.sander@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	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 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

Signed-off-by: Mike Galbraith <bitbucket@...ine.de>

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 2328c04..31d57a2 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1036,7 +1036,7 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 		&& hrtimer_enqueue_reprogram(timer, new_base)) {
 
 		if (wakeup
-#ifdef CONFIG_PREEMPT_RT_BASE
+#if defined(CONFIG_PREEMPT_RT_BASE) && defined(CONFIG_HIGH_RES_TIMERS)
 		    /*
 		     * Move softirq based timers away from the rbtree in
 		     * case it expired already. Otherwise we would have a


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