linux-kernel - Re: [GIT PULL v2] sched: Make sleep inside atomic detection work on !PREEMPT

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Message-ID: <20110701172934.GA6240@elte.hu>
Date:	Fri, 1 Jul 2011 19:29:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [GIT PULL v2] sched: Make sleep inside atomic detection work on
 !PREEMPT


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> On Fri, Jul 01, 2011 at 05:05:17PM +0200, Ingo Molnar wrote:
> > 
> > -tip testing also found that m32r fails to build:
> > 
> > /home/mingo/tip/kernel/sched.c: In function 'preempt_schedule':
> > /home/mingo/tip/kernel/sched.c:4364: error: implicit declaration of function 'add_preempt_count_notrace'
> > /home/mingo/tip/kernel/sched.c:4366: error: implicit declaration of function 'sub_preempt_count_notrace'
> > 
> > due to:
> > 
> > bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a is the first bad commit
> > commit bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a
> > Author: Frederic Weisbecker <fweisbec@...il.com>
> > Date:   Wed Jun 8 01:13:27 2011 +0200
> > 
> >     sched: Isolate preempt counting in its own config option
> > 
> > Thanks,
> > 
> > 	Ingo
> 
> I have no clue how that did happen.
> 
> Can you send me your config?

Just the m32r defconfig: m32700ut.smp_defconfig.

My guess would be that one of these:

 include/linux/bit_spinlock.h |    2 +-
 include/linux/hardirq.h      |    4 ++--
 include/linux/pagemap.h      |    4 ++--
 include/linux/preempt.h      |   26 +++++++++++++++++---------
 include/linux/rcupdate.h     |   12 ++++++------
 include/linux/sched.h        |    2 +-

changed/exposed some header dependency quirk on m32r, failing the 
build. Or m32r has some strange .config combo.

Thanks,

	Ingo
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