From efe117ab8114f47f317b4803e5bc0104420bcba2 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 5 Nov 2009 11:06:40 +0100 Subject: [PATCH] mac80211: Speedup ieee80211_remove_interfaces() Speedup ieee80211_remove_interfaces() by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet Reviewed-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/iface.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 1bf12a26b45e..80c16f6e2af6 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -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(); + 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, -- 2.30.2