From 2595d78f3df2ca389aae259a291f93eb06ecad43 Mon Sep 17 00:00:00 2001
From: Kevin Bowling <kbowling@FreeBSD.org>
Date: Sun, 21 Mar 2021 11:50:30 -0700
Subject: [PATCH] sys/ck.h: Add an include guard

Approved by:	cognet
MFC after:	1 week
Sponsored by:	BBOX.io
Differential Revision:	https://reviews.freebsd.org/D29357
---
 sys/sys/ck.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/sys/ck.h b/sys/sys/ck.h
index 3bfce70c8d2..b04fe67b476 100644
--- a/sys/sys/ck.h
+++ b/sys/sys/ck.h
@@ -1,6 +1,9 @@
 /*
  * $FreeBSD$
  */
+#ifndef _SYS_CK_H_
+#define _SYS_CK_H_
+
 #ifdef _KERNEL
 #include <ck_queue.h>
 #include <ck_epoch.h>
@@ -11,3 +14,5 @@
 #define CK_LIST_HEAD LIST_HEAD
 #define CK_LIST_ENTRY LIST_ENTRY
 #endif
+
+#endif /* !_SYS_CK_H_ */