Speedup ieee80211_remove_interfaces() by factorizing synchronize_rcu() calls
Signed-off-by: Eric Dumazet <eric.dumazet@xxxxxxxxx>
---
net/mac80211/iface.c | 14 +++++---------
1 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 14f10eb..a445f50 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -852,22 +852,18 @@ void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
void ieee80211_remove_interfaces(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata, *tmp;
+ LIST_HEAD(unreg_list);
ASSERT_RTNL();
+ mutex_lock(&local->iflist_mtx);
list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
- /*
- * we cannot hold the iflist_mtx across unregister_netdevice,
- * but we only need to hold it for list modifications to lock
- * out readers since we're under the RTNL here as all other
- * writers.
- */
- mutex_lock(&local->iflist_mtx);
list_del(&sdata->list);
- mutex_unlock(&local->iflist_mtx);
- unregister_netdevice(sdata->dev);
+ unregister_netdevice_queue(sdata->dev, &unreg_list);
}
+ mutex_unlock(&local->iflist_mtx);
+ unregister_netdevice_many(&unreg_list);
}
static u32 ieee80211_idle_off(struct ieee80211_local *local,
--
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