From 4f739cddb9f37b9780c9b0f4d1222b0be8d7e723 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Fri, 15 Sep 2017 23:58:38 +0200
Subject: data: move from spinlocks to lockless data structure

Reference: https://www.cs.rochester.edu/research/synchronization/pseudocode/queues.html
Original-code-from: @aegis
---
 src/send.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/send.c')

diff --git a/src/send.c b/src/send.c
index f270ad2..850f771 100644
--- a/src/send.c
+++ b/src/send.c
@@ -111,7 +111,7 @@ void packet_send_keepalive(struct wireguard_peer *peer)
 	struct sk_buff *skb;
 	struct sk_buff_head queue;
 
-	if (list_empty(&peer->init_queue.queue)) {
+	if (!atomic_read(&peer->init_queue.len)) {
 		skb = alloc_skb(DATA_PACKET_HEAD_ROOM + MESSAGE_MINIMUM_LENGTH, GFP_ATOMIC);
 		if (unlikely(!skb))
 			return;
-- 
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