diff mbox

mac80211: add missing rcu_barrier

Message ID 1305363891.3437.9.camel@jlt3.sipsolutions.net (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Johannes Berg May 14, 2011, 9:04 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

mac80211 uses call_rcu() with functions that are
defined in the module, so it must use rcu_barrier()
at module exit time.

Luckily, this seems to not be a problem in practice
as module unload and unregistration takes a long
time and probably does multiple synchronize_rcu().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
Might want to apply this before the mesh patch that uses call_rcu I just
sent a few minutes ago.

 net/mac80211/main.c |    2 ++
 1 file changed, 2 insertions(+)



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diff mbox

Patch

--- a/net/mac80211/main.c	2011-05-14 11:01:03.000000000 +0200
+++ b/net/mac80211/main.c	2011-05-14 11:01:42.000000000 +0200
@@ -1090,6 +1090,8 @@  static void __exit ieee80211_exit(void)
 		ieee80211s_stop();
 
 	ieee80211_iface_exit();
+
+	rcu_barrier();
 }