linux-kernel - Re: [Patch 0/2] sysfs: fix s

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Date:	Fri, 05 Feb 2010 11:09:09 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	Peter Zijlstra <peterz@...radead.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <gregkh@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>, Miles Lane <miles.lane@...il.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Patch 0/2] sysfs: fix s_active lockdep warning

Alan Stern wrote:
> On Thu, 4 Feb 2010, Peter Zijlstra wrote:
> 
>> On Thu, 2010-02-04 at 11:35 -0500, Alan Stern wrote:
>>> +#include <linux/sched.h>
>> #include <linux/lockdep.h>
>>
>> should be sufficient I think.
> 
> No, it's not.  It leaves MAX_LOCK_DEPTH undeclared.  Beats me why that 
> symbol ended up in sched.h...
> 

because task_struct->held_locks uses it, but it seems better to move
it into lockdep.h...
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