From: Jesper Dangaard Brouer Subject: [PATCH 07/10] decnet: Use rcu_barrier() on module unload. Date: Tue, 23 Jun 2009 17:04:29 +0200 Message-ID: <20090623150429.22490.15113.stgit@localhost> References: <20090623150330.22490.87327.stgit@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit 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: netfilter-devel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org The decnet module unloading as been disabled with a '#if 0' statement, because it have had issues. Perhaps using rcu_barrier() will fix these issues? Any maintainers with input? Signed-off-by: Jesper Dangaard Brouer --- net/decnet/af_decnet.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c index d351b8d..bff12da 100644 --- a/net/decnet/af_decnet.c +++ b/net/decnet/af_decnet.c @@ -2393,6 +2393,10 @@ module_init(decnet_init); * Prevent DECnet module unloading until its fixed properly. * Requires an audit of the code to check for memory leaks and * initialisation problems etc. + * + * hawk@comx.dk 2009-06-19: + * I have added a rcu_barrier() which should plug some of your + * module unload issues. Maintainers please try it out... */ #if 0 static void __exit decnet_exit(void) @@ -2413,6 +2417,8 @@ static void __exit decnet_exit(void) proc_net_remove(&init_net, "decnet"); proto_unregister(&dn_proto); + + rcu_barrier_bh(); /* Wait for completion of call_rcu_bh()'s */ } module_exit(decnet_exit); #endif