Subject: [PATCH 03/10] mac80211: Use rcu_barrier() on unload.

From: Jesper Dangaard Brouer <[email-masked]>
Date: Tue, 23 Jun 2009 17:04:09 +0200

The mac80211 module uses rcu_call() thus it should use rcu_barrier()
on module unload.

I'm having a hardtime verifying that no more call_rcu() callbacks can
be schedules in the module unload path.  Could a maintainer please
look into this?

Signed-off-by: Jesper Dangaard Brouer <[email-masked]>
---

 net/mac80211/main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 092a017..e9f70ce 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1100,6 +1100,8 @@ static void __exit ieee80211_exit(void)
 		ieee80211s_stop();
 
 	ieee80211_debugfs_netdev_exit();
+
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
 }