From e35dc5149d87a1a925d9d3cc9827d90f4caf68bb Mon Sep 17 00:00:00 2001
From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Sat, 17 Feb 2018 20:56:35 +0000
Subject: [PATCH] Add support for kref_read() function in the LinuxKPI.

MFC after:	1 week
Submitted by:	Johannes Lundberg <johalun0@gmail.com>
Sponsored by:	Mellanox Technologies
---
 sys/compat/linuxkpi/common/include/linux/kref.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/kref.h b/sys/compat/linuxkpi/common/include/linux/kref.h
index 80fd271015b..7411694ad65 100644
--- a/sys/compat/linuxkpi/common/include/linux/kref.h
+++ b/sys/compat/linuxkpi/common/include/linux/kref.h
@@ -52,6 +52,13 @@ kref_init(struct kref *kref)
 	refcount_init(&kref->refcount.counter, 1);
 }
 
+static inline unsigned int
+kref_read(const struct kref *kref)
+{
+
+	return (atomic_read(&kref->refcount));
+}
+
 static inline void
 kref_get(struct kref *kref)
 {