mac80211: use RCU_INIT_POINTER

rcu_assign_pointer() ensures that the initialization of a structure is
carried out before storing a pointer to that structure. However, in the
case that NULL is assigned there's no structure to initialize so using
RCU_INIT_POINTER instead is safe and more efficient.

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
[squash eight tiny patches, rewrite commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index aaa59d719592..906bc3b05aae 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1566,7 +1566,7 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 
                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
                     sta->sdata->u.vlan.sta) {
-                        rcu_assign_pointer(sta->sdata->u.vlan.sta, NULL);
+                        RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
                         prev_4addr = true;
                 }