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Commit efe117ab authored by Eric Dumazet's avatar Eric Dumazet Committed by John W. Linville
Browse files

mac80211: Speedup ieee80211_remove_interfaces() 



Speedup ieee80211_remove_interfaces() by factorizing synchronize_rcu() calls

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 4ba3eb03

net/mac80211/iface.c

+5 −9
Original line number Diff line number Diff line
@@ -860,22 +860,18 @@ 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();



	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_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {

		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,