net: sched: add rcu annotations around qdisc->qdisc_sleeping

[tomoyo/tomoyo-test1.git] / net / sched / sch_mqprio.c

diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index dc5a0ff..ab69ff7 100644 (file)
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -557,7 +557,7 @@ static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
         * qdisc totals are added at end.
         */
        for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
-               qdisc = netdev_get_tx_queue(dev, ntx)->qdisc_sleeping;
+               qdisc = rtnl_dereference(netdev_get_tx_queue(dev, ntx)->qdisc_sleeping);
                spin_lock_bh(qdisc_lock(qdisc));
 
                gnet_stats_add_basic(&sch->bstats, qdisc->cpu_bstats,
@@ -604,7 +604,7 @@ static struct Qdisc *mqprio_leaf(struct Qdisc *sch, unsigned long cl)
        if (!dev_queue)
                return NULL;
 
-       return dev_queue->qdisc_sleeping;
+       return rtnl_dereference(dev_queue->qdisc_sleeping);
 }
 
 static unsigned long mqprio_find(struct Qdisc *sch, u32 classid)
@@ -637,7 +637,7 @@ static int mqprio_dump_class(struct Qdisc *sch, unsigned long cl,
                tcm->tcm_parent = (tc < 0) ? 0 :
                        TC_H_MAKE(TC_H_MAJ(sch->handle),
                                  TC_H_MIN(tc + TC_H_MIN_PRIORITY));
-               tcm->tcm_info = dev_queue->qdisc_sleeping->handle;
+               tcm->tcm_info = rtnl_dereference(dev_queue->qdisc_sleeping)->handle;
        } else {
                tcm->tcm_parent = TC_H_ROOT;
                tcm->tcm_info = 0;
@@ -693,7 +693,7 @@ static int mqprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
        } else {
                struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
 
-               sch = dev_queue->qdisc_sleeping;
+               sch = rtnl_dereference(dev_queue->qdisc_sleeping);
                if (gnet_stats_copy_basic(d, sch->cpu_bstats,
                                          &sch->bstats, true) < 0 ||
                    qdisc_qstats_copy(d, sch) < 0)