netdev - [RFC Patch net-next 4/4] net_sched: make ingress qdisc lockless

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Date:	Thu,  9 Jan 2014 10:19:53 -0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	John Fastabend <john.fastabend@...il.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>
Subject: [RFC Patch net-next 4/4] net_sched: make ingress qdisc lockless

Cc: John Fastabend <john.fastabend@...il.com>
Cc: Eric Dumazet <eric.dumazet@...il.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Jamal Hadi Salim <jhs@...atatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
---
 net/core/dev.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index ce01847..e357d05 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3376,10 +3376,8 @@ static int ing_filter(struct sk_buff *skb, struct netdev_queue *rxq)
 
 	q = rxq->qdisc;
 	if (q != &noop_qdisc) {
-		spin_lock(qdisc_lock(q));
 		if (likely(!test_bit(__QDISC_STATE_DEACTIVATED, &q->state)))
 			result = qdisc_enqueue_root(skb, q);
-		spin_unlock(qdisc_lock(q));
 	}
 
 	return result;
-- 
1.8.3.1

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