linux-kernel - Re: 2.6.35-rc2-git1 - include/linux/cgroup.h:534 invoked rcu_dereference

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Date:	Wed, 09 Jun 2010 17:24:28 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Miles Lane <miles.lane@...il.com>
Cc:	paulmck@...ux.vnet.ibm.com, Vivek Goyal <vgoyal@...hat.com>,
	Eric Paris <eparis@...hat.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>, nauman@...gle.com,
	eric.dumazet@...il.com, netdev@...r.kernel.org,
	Jens Axboe <jens.axboe@...cle.com>,
	Gui Jianfeng <guijianfeng@...fujitsu.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: 2.6.35-rc2-git1 - include/linux/cgroup.h:534 invoked 
 rcu_dereference_check() without protection!

On Wed, 2010-06-09 at 11:11 -0400, Miles Lane wrote:
> 
> Sorry.  I misunderstood this message when I first read it.  I didn't
> realize this message include a new version of the patch.
> Anyhow, I just tried to apply the patch to 2.6.35-rc2-git3 and got this:
> 
> # patch -p1 -l -F 20 --dry-run < ../5.patch
> patching file include/linux/cgroup.h
> patching file kernel/sched.c
> Hunk #1 succeeded at 306 with fuzz 1.
> Hunk #3 FAILED at 4462.
> Hunk #4 succeeded at 4487 with fuzz 3.
> 1 out of 4 hunks FAILED -- saving rejects to file kernel/sched.c.rej

Weird.. it seems to apply without trouble to Linus' git tree.

root@...ns:/usr/src/linux-2.6# git checkout -f origin/master
HEAD is now at 84f7586... Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
root@...ns:/usr/src/linux-2.6# quilt push
Applying patch patches/sched-rcu-validation.patch
patching file include/linux/cgroup.h
patching file kernel/sched.c

Now at patch patches/sched-rcu-validation.patch
root@...ns:/usr/src/linux-2.6# git describe
v2.6.35-rc2-54-g84f7586

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