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wifi: mac80211: add RCU _check() link access variants

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We might sometimes need to use RCU and locking in the same code
path, so add the two variants link_conf_dereference_check() and
link_sta_dereference_check().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-09-27 11:39:23 +02:00
parent 3903963ed9
commit f3630c4f82
1 changed files with 8 additions and 0 deletions
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8
include/net/mac80211.h
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@ -1915,6 +1915,10 @@ static inline bool lockdep_vif_mutex_held(struct ieee80211_vif *vif)
rcu_dereference_protected((vif)->link_conf[link_id], \
lockdep_vif_mutex_held(vif))
#define link_conf_dereference_check(vif, link_id) \
rcu_dereference_check((vif)->link_conf[link_id], \
lockdep_vif_mutex_held(vif))
/**
* enum ieee80211_key_flags - key flags
*
@ -2311,6 +2315,10 @@ static inline bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta)
rcu_dereference_protected((sta)->link[link_id], \
lockdep_sta_mutex_held(sta))
#define link_sta_dereference_check(sta, link_id) \
rcu_dereference_check((sta)->link[link_id], \
lockdep_sta_mutex_held(sta))
#define for_each_sta_active_link(vif, sta, link_sta, link_id) \
for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) \
if ((!(vif)->active_links || \