From: Sven Eckelmann <sven@narfation.org>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org,
simon.wunderlich@s2003.tu-chemnitz.de,
Marek Lindner <lindner_marek@yahoo.de>
Subject: Re: Using nested locking for spin_lock_bh
Date: Thu, 29 Mar 2012 12:41 +0200 [thread overview]
Message-ID: <2191191.ipEiEk2XX9@bentobox> (raw)
In-Reply-To: <20120329031136.GA2062@zhy>
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On Thursday, March 29, 2012 11:11:37 AM Yong Zhang wrote:
> On Wed, Mar 28, 2012 at 06:36:39PM +0200, Sven Eckelmann wrote:
> > Hi,
> >
> > I started to run some experimental batman-adv code inside some virtual
> > machines with different debugging functions enabled. One of them was
> > lockdep. There we noticed a false positive for a lock class that is
> > actually used in two different data structures.
>
> Hmm, I think you can initialize the lock class in the two differnent data
> structures with differnt lock_class_key.
Thanks. I think I understand the problem now a little bit better and could
resolve it using lockdep_set_class.
Kind regards,
Sven
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next prev parent reply other threads:[~2012-03-29 10:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-28 16:36 Using nested locking for spin_lock_bh Sven Eckelmann
2012-03-29 3:11 ` Yong Zhang
2012-03-29 10:41 ` Sven Eckelmann [this message]
2012-04-15 11:18 ` Peter Zijlstra
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