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authorEric Dumazet <edumazet@google.com>2016-06-06 09:37:15 -0700
committerDavid S. Miller <davem@davemloft.net>2016-06-07 16:37:13 -0700
commitf9eb8aea2a1e12fc2f584d1627deeb957435a801 (patch)
treebc3cf06664da45bc0e6ce9b5165dba534ed11751 /net/l2tp
parent64151ae36ed93c45654069c8aff2a7f0125075e8 (diff)
downloadlinux-f9eb8aea2a1e12fc2f584d1627deeb957435a801.tar.bz2
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/l2tp')
-rw-r--r--net/l2tp/l2tp_eth.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index e253c26f31ac..c00d72d182fa 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -68,6 +68,8 @@ static inline struct l2tp_eth_net *l2tp_eth_pernet(struct net *net)
}
static struct lock_class_key l2tp_eth_tx_busylock;
+static struct lock_class_key l2tp_qdisc_running_key;
+
static int l2tp_eth_dev_init(struct net_device *dev)
{
struct l2tp_eth *priv = netdev_priv(dev);
@@ -76,6 +78,8 @@ static int l2tp_eth_dev_init(struct net_device *dev)
eth_hw_addr_random(dev);
eth_broadcast_addr(dev->broadcast);
dev->qdisc_tx_busylock = &l2tp_eth_tx_busylock;
+ dev->qdisc_running_key = &l2tp_qdisc_running_key;
+
return 0;
}