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8021q: Vlan driver should use rcu_barrier() on unload instead of syncronize_net()

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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.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesper Dangaard Brouer 2009-06-08 03:11:28 +00:00 committed by David S. Miller
parent 1abb0de2f8
commit 6e327c11a9
1 changed files with 1 additions and 1 deletions
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2
net/8021q/vlan.c
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@ -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();
}