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authorEric Dumazet <edumazet@google.com>2016-06-06 19:37:15 +0300
committerDavid S. Miller <davem@davemloft.net>2016-06-08 02:37:13 +0300
commitf9eb8aea2a1e12fc2f584d1627deeb957435a801 (patch)
treebc3cf06664da45bc0e6ce9b5165dba534ed11751 /net/ieee802154
parent64151ae36ed93c45654069c8aff2a7f0125075e8 (diff)
downloadlinux-f9eb8aea2a1e12fc2f584d1627deeb957435a801.tar.xz
net_sched: transform qdisc running bit into a seqcount
Instead of using a single bit (__QDISC___STATE_RUNNING) in sch->__state, use a seqcount. This adds lockdep support, but more importantly it will allow us to sample qdisc/class statistics without having to grab qdisc root lock. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ieee802154')
-rw-r--r--net/ieee802154/6lowpan/core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index dd085db8580e..14aa5effd29a 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -60,6 +60,7 @@ static struct header_ops lowpan_header_ops = {
static struct lock_class_key lowpan_tx_busylock;
static struct lock_class_key lowpan_netdev_xmit_lock_key;
+static struct lock_class_key lowpan_qdisc_running_key;
static void lowpan_set_lockdep_class_one(struct net_device *ldev,
struct netdev_queue *txq,
@@ -73,6 +74,8 @@ static int lowpan_dev_init(struct net_device *ldev)
{
netdev_for_each_tx_queue(ldev, lowpan_set_lockdep_class_one, NULL);
ldev->qdisc_tx_busylock = &lowpan_tx_busylock;
+ ldev->qdisc_running_key = &lowpan_qdisc_running_key;
+
return 0;
}