From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: Fw: rcu warning Date: Wed, 22 Sep 2010 14:47:36 -0700 Message-ID: <20100922144736.baf75544.akpm@linux-foundation.org> References: <20100922214438.GN2435@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org To: paulmck@linux.vnet.ibm.com Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:50673 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750913Ab0IVVri (ORCPT ); Wed, 22 Sep 2010 17:47:38 -0400 In-Reply-To: <20100922214438.GN2435@linux.vnet.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 22 Sep 2010 14:44:38 -0700 "Paul E. McKenney" wrote: > In linux/master, there is an rcu_read_lock_bh() in the call path, but > an rcu_dereference() instead of an rcu_dereference_bh(). Thoughts? > > (I have asked Andrew what kernel this is against -- I don't see the > rcu_read_lock() that I would expect to see in the lockdep output.) current linux-next.