From: Jesper Dangaard Brouer Subject: [PATCH 02/10] bridge: Use rcu_barrier() instead of syncronize_net() on unload. Date: Tue, 23 Jun 2009 17:04:04 +0200 Message-ID: <20090623150404.22490.15268.stgit@localhost> References: <20090623150330.22490.87327.stgit@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: Jesper Dangaard Brouer , "Paul E. McKenney" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dougthompson@xmission.com, bluesmoke-devel@lists.sourceforge.net, axboe@kernel.dk, "Patrick McHardy" , christine.caulfield@googlemail.com, Trond.Myklebust@netapp.com, linux-wireless@vger.kernel.org, johannes@sipsolutions.net, yoshfuji@linux-ipv6.org, shemminger@linux-foundation.org, linux-nfs@vger.kernel.org, bfields@fieldses.org, neilb@suse.de, linux-ext4@vger.kernel.org, tytso@mit.edu, adilger@sun.com, netfilter-devel@vger.kernel.org To: "David S. Miller" Return-path: In-Reply-To: <20090623150330.22490.87327.stgit@localhost> Sender: netdev-owner@vger.kernel.org List-ID: When unloading modules that uses call_rcu() callbacks, then we must use rcu_barrier(). This module uses syncronize_net() which is not enough to be sure that all callback has been completed. Signed-off-by: Jesper Dangaard Brouer --- net/bridge/br.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/bridge/br.c b/net/bridge/br.c index 9aac521..e1241c7 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -93,7 +93,7 @@ static void __exit br_deinit(void) unregister_pernet_subsys(&br_net_ops); - synchronize_net(); + rcu_barrier(); /* Wait for completion of call_rcu()'s */ br_netfilter_fini(); #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)