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| author | Bob Copeland <me@bobcopeland.com> | 2013-04-18 18:26:49 -0400 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-04-22 15:40:39 +0200 |
| commit | 8ceb59557bdc373e532b87d4142ce27e04218f0e (patch) | |
| tree | 95fab44394b51719702afc7bbe22789043be5f65 /net/mac80211/cfg.c | |
| parent | 908f8d07e9774c2476e0683f6a0ce50562a2da45 (diff) | |
| download | lwn-8ceb59557bdc373e532b87d4142ce27e04218f0e.tar.gz lwn-8ceb59557bdc373e532b87d4142ce27e04218f0e.zip | |
mac80211: use synchronize_rcu() with rcu_barrier()
The RCU docs used to state that rcu_barrier() included a wait
for an RCU grace period; however the comments for rcu_barrier()
as of commit f0a0e6f... "rcu: Clarify memory-ordering properties
of grace-period primitives" contradict this.
So add back synchronize_{rcu,net}() to where they once were,
but keep the rcu_barrier()s for the call_rcu() callbacks.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bob Copeland <bob@cozybit.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/cfg.c')
| -rw-r--r-- | net/mac80211/cfg.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 490990e3fc38..1a89c80e6407 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1043,6 +1043,7 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) sta_info_flush_defer(vlan); sta_info_flush_defer(sdata); + synchronize_net(); rcu_barrier(); list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { sta_info_flush_cleanup(vlan); |