old_bcn 908 net/mac80211/mesh.c struct beacon_data *old_bcn; old_bcn 911 net/mac80211/mesh.c old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, old_bcn 918 net/mac80211/mesh.c if (old_bcn) old_bcn 919 net/mac80211/mesh.c kfree_rcu(old_bcn, rcu_head);