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| author | Monam Agarwal <monamagarwal123@gmail.com> | 2014-03-24 00:51:43 +0530 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2014-04-09 10:55:30 +0200 |
| commit | 0c2bef4621c5feb5bda9068c9964b2e9acf57017 (patch) | |
| tree | 0c57534e45d0d072873dcab9b5fddf54b3fef6a7 /net/mac80211/scan.c | |
| parent | 34dd886c19547ea138634b98a615ccd1fe42cd20 (diff) | |
| download | linux-0-day-0c2bef4621c5feb5bda9068c9964b2e9acf57017.tar.gz linux-0-day-0c2bef4621c5feb5bda9068c9964b2e9acf57017.tar.xz | |
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>
Diffstat (limited to 'net/mac80211/scan.c')
| -rw-r--r-- | net/mac80211/scan.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 3ce7f2c8539a1..28185c8dc19a3 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -309,7 +309,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) if (local->scan_req != local->int_scan_req) cfg80211_scan_done(local->scan_req, aborted); local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); local->scanning = 0; local->scan_chandef.chan = NULL; @@ -559,7 +559,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, ieee80211_recalc_idle(local); local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); } return rc; @@ -773,7 +773,7 @@ void ieee80211_scan_work(struct work_struct *work) int rc; local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); rc = __ieee80211_start_scan(sdata, req); if (rc) { @@ -1014,7 +1014,7 @@ out_free: if (ret) { /* Clean in case of failure after HW restart or upon resume. */ - rcu_assign_pointer(local->sched_scan_sdata, NULL); + RCU_INIT_POINTER(local->sched_scan_sdata, NULL); local->sched_scan_req = NULL; } @@ -1089,7 +1089,7 @@ void ieee80211_sched_scan_stopped_work(struct work_struct *work) return; } - rcu_assign_pointer(local->sched_scan_sdata, NULL); + RCU_INIT_POINTER(local->sched_scan_sdata, NULL); /* If sched scan was aborted by the driver. */ local->sched_scan_req = NULL; |