Messages in this thread | | | Date | Mon, 8 Jun 2009 08:54:46 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH 1/5] 8021q: Vlan driver should use rcu_barrier() on unload instead of syncronize_net() |
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On Mon, Jun 08, 2009 at 03:11:28PM +0200, Jesper Dangaard Brouer wrote: > The VLAN 8021q driver needs to call rcu_barrier() when unloading the module, > instead of syncronize_net(). This is needed to make sure that outstanding > call_rcu() callbacks have completed, before the callback function code is > removed on module unload.
Looks good! And thank you for checking up on this!!!
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk> > --- > > net/8021q/vlan.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c > index 714e1c3..fe64908 100644 > --- a/net/8021q/vlan.c > +++ b/net/8021q/vlan.c > @@ -758,7 +758,7 @@ static void __exit vlan_cleanup_module(void) > BUG_ON(!hlist_empty(&vlan_group_hash[i])); > > unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops); > - synchronize_net(); > + rcu_barrier(); /* Wait for completion of call_rcu()'s */ > > vlan_gvrp_uninit(); > } >
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