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Message-Id: <20100307.153127.98692943.davem@davemloft.net>
Date:	Sun, 07 Mar 2010 15:31:27 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	paulmck@...ux.vnet.ibm.com, netdev@...r.kernel.org,
	shemminger@...tta.com
Subject: Re: [PATCH 6/13] bridge: Add core IGMP snooping support

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Sat, 6 Mar 2010 15:03:35 +0800

> On Sat, Mar 06, 2010 at 02:56:55PM +0800, Herbert Xu wrote:
>>
>> > In contrast, rcu_barrier_bh() is guaranteed not to return until all
>> > pending RCU-bh callbacks have executed.
>> 
>> You're absolutely right.  I'll send a patch to fix this.
> 
> bridge: Fix RCU race in br_multicast_stop
> 
> Thanks to Paul McKenny for pointing out that it is incorrect to use 
> synchronize_rcu_bh to ensure that pending callbacks have completed.
> Instead we should use rcu_barrier_bh.
> 
> Reported-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied.
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