From 5f6834b693976b63f48fef8c20e3ca81a8e86817 Mon Sep 17 00:00:00 2001
From: Aidan Cully <github@aidan.users.panix.com>
Date: Tue, 21 Nov 2017 19:37:46 -0500
Subject: [PATCH] ck_queue: fix logic inversion in CK_STAILQ_CONCAT.

STAILQ_CONCAT transcription error lead to inversion of logic. It would only work for empty lists.
---
 include/ck_queue.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/ck_queue.h b/include/ck_queue.h
index c1e9872..30c384e 100644
--- a/include/ck_queue.h
+++ b/include/ck_queue.h
@@ -235,7 +235,7 @@ struct {								\
  * Singly-linked Tail queue functions.
  */
 #define	CK_STAILQ_CONCAT(head1, head2) do {					\
-	if ((head2)->stqh_first == NULL) {					\
+	if ((head2)->stqh_first != NULL) {					\
 		ck_pr_store_ptr((head1)->stqh_last, (head2)->stqh_first);	\
 		ck_pr_fence_store();						\
 		(head1)->stqh_last = (head2)->stqh_last;			\