netdev - [PATCH][net-next][V2] net: avoid to call skb_queue

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Message-Id: <1418002975-15271-1-git-send-email-roy.qing.li@gmail.com>
Date:	Mon,  8 Dec 2014 09:42:55 +0800
From:	roy.qing.li@...il.com
To:	netdev@...r.kernel.org
Cc:	edumazet@...gle.com, sergei.shtylyov@...entembedded.com
Subject: [PATCH][net-next][V2] net: avoid to call skb_queue_len again

From: Li RongQing <roy.qing.li@...il.com>

the queue length of sd->input_pkt_queue has been put into qlen,
and impossible to change, since hold the lock

Signed-off-by: Li RongQing <roy.qing.li@...il.com>
Acked-by: Eric Dumazet <edumazet@...gle.com>
Cc: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 0814a56..b954400 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3297,7 +3297,7 @@ static int enqueue_to_backlog(struct sk_buff *skb, int cpu,
 	rps_lock(sd);
 	qlen = skb_queue_len(&sd->input_pkt_queue);
 	if (qlen <= netdev_max_backlog && !skb_flow_limit(skb, qlen)) {
-		if (skb_queue_len(&sd->input_pkt_queue)) {
+		if (qlen) {
 enqueue:
 			__skb_queue_tail(&sd->input_pkt_queue, skb);
 			input_queue_tail_incr_save(sd, qtail);
-- 
2.1.0

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