linux-kernel - Re: [PATCH 00/11] rcu: Add missing RCU idle APIs on idle loop v2

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Message-ID: <20120826092137.GA50543@kaini.schwarzvogel.de>
Date:	Sun, 26 Aug 2012 11:21:37 +0200
From:	Tobias Klausmann <klausman@...warzvogel.de>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Michael Cree <mcree@...on.net.nz>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	LKML <linux-kernel@...r.kernel.org>,
	Chris Zankel <chris@...kel.net>,
	"3.2.x.." <stable@...r.kernel.org>,
	Chen Liqin <liqin.chen@...plusct.com>,
	Lennox Wu <lennox.wu@...il.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Parisc <linux-parisc@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	m68k <linux-m68k@...ts.linux-m68k.org>,
	Hirokazu Takata <takata@...ux-m32r.org>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Mikael Starvik <starvik@...s.com>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Cris <linux-cris-kernel@...s.com>,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>,
	alpha <linux-alpha@...r.kernel.org>
Subject: Re: [PATCH 00/11] rcu: Add missing RCU idle APIs on idle loop v2

Hi! 

On Sat, 25 Aug 2012, Paul E. McKenney wrote:
> Both Alpha patches should apply as-is back to 3.3, and should also fix
> the problem.  Could you please check this on the versions of interest?

I just now tried them on top of 3.3.8 from linux-stable.git.
While they apply cleanly, I get a compile failure:

  CC      arch/alpha/kernel/process.o
arch/alpha/kernel/process.c: In function 'cpu_idle':
arch/alpha/kernel/process.c:64: error: implicit declaration of function 'schedule_preempt_disabled'
make[1]: *** [arch/alpha/kernel/process.o] Error 1
make: *** [arch/alpha/kernel] Error 2

AFAICT, schedule_preempt_disabled() was only introduced in 3.4
and thus needs to be backported for 3.3.

Regards,
Tobias

-- 
panic("%s: CORRUPTED BTREE OR SOMETHING", __FUNCTION__);
        linux-2.6.6/fs/xfs/xfs_bmap.c
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