From 4704f3edfdd3cc5918932577373c0dc165d52959 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 12 Jan 2012 04:41:32 +0000 Subject: net: reintroduce missing rcu_assign_pointer() calls [ Upstream commit cf778b00e96df6d64f8e21b8395d1f8a859ecdc7 ] commit a9b3cd7f32 (rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER) did a lot of incorrect changes, since it did a complete conversion of rcu_assign_pointer(x, y) to RCU_INIT_POINTER(x, y). We miss needed barriers, even on x86, when y is not NULL. Signed-off-by: Eric Dumazet CC: Stephen Hemminger CC: Paul E. McKenney Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/mac80211/agg-rx.c | 2 +- net/mac80211/cfg.c | 4 ++-- net/mac80211/ibss.c | 2 +- net/mac80211/sta_info.c | 6 +++--- 4 files changed, 7 insertions(+), 7 deletions(-) (limited to 'net/mac80211') diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 93b243422659..41c2310eb3ca 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -326,7 +326,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, status = WLAN_STATUS_SUCCESS; /* activate it for RX */ - RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx); + rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx); if (timeout) mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout)); diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index d06c65fa5526..11cee762047b 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -575,7 +575,7 @@ static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata, sdata->vif.bss_conf.dtim_period = new->dtim_period; - RCU_INIT_POINTER(sdata->u.ap.beacon, new); + rcu_assign_pointer(sdata->u.ap.beacon, new); synchronize_rcu(); @@ -922,7 +922,7 @@ static int ieee80211_change_station(struct wiphy *wiphy, return -EBUSY; } - RCU_INIT_POINTER(vlansdata->u.vlan.sta, sta); + rcu_assign_pointer(vlansdata->u.vlan.sta, sta); } sta->sdata = vlansdata; diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index ede9a8b341ac..3ece106d5660 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -184,7 +184,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, *pos++ = 0; /* U-APSD no in use */ } - RCU_INIT_POINTER(ifibss->presp, skb); + rcu_assign_pointer(ifibss->presp, skb); sdata->vif.bss_conf.beacon_int = beacon_int; sdata->vif.bss_conf.basic_rates = basic_rates; diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 8eaa746ec7a2..1fdd8ff60134 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -73,7 +73,7 @@ static int sta_info_hash_del(struct ieee80211_local *local, if (!s) return -ENOENT; if (s == sta) { - RCU_INIT_POINTER(local->sta_hash[STA_HASH(sta->sta.addr)], + rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], s->hnext); return 0; } @@ -83,7 +83,7 @@ static int sta_info_hash_del(struct ieee80211_local *local, s = rcu_dereference_protected(s->hnext, lockdep_is_held(&local->sta_lock)); if (rcu_access_pointer(s->hnext)) { - RCU_INIT_POINTER(s->hnext, sta->hnext); + rcu_assign_pointer(s->hnext, sta->hnext); return 0; } @@ -232,7 +232,7 @@ static void sta_info_hash_add(struct ieee80211_local *local, struct sta_info *sta) { sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; - RCU_INIT_POINTER(local->sta_hash[STA_HASH(sta->sta.addr)], sta); + rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); } static void sta_unblock(struct work_struct *wk) -- cgit v1.2.3