diff mbox

[07/10] decnet: Use rcu_barrier() on module unload.

Message ID 1245843884.6695.54.camel@localhost.localdomain
State Not Applicable, archived
Headers show

Commit Message

Jesper Dangaard Brouer June 24, 2009, 11:44 a.m. UTC 
On Wed, 2009-06-24 at 07:23 +0100, Chrissie Caulfield wrote:
> The issues with DECnet module unloading are a little more than just an
> RCU leak I think!
> 
> Though that area does need reviewing ... when I get some time.

Fine.  Now you have read my comment in the code, then there is a updated
patch below.  Will you ack-that?
diff mbox

Patch

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