From a952a3584baca89b59d54d58a6c6dcd2a7193880 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Thu, 19 Nov 2020 03:47:09 +0000
Subject: [PATCH] scst: Unbreak the build for kernel versions 3.0..4.16

Reported-by: Gilbert Standen <gilstanden@hotmail.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9184 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index 0fff88b04..f8d91e996 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -33,6 +33,9 @@
 #include <linux/dmapool.h>
 #include <linux/eventpoll.h>
 #include <linux/iocontext.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+#include <linux/kobject_ns.h>
+#endif
 #include <linux/scatterlist.h>	/* struct scatterlist */
 #include <linux/slab.h>		/* kmalloc() */
 #include <linux/stddef.h>	/* sizeof_field() */
@@ -849,15 +852,18 @@ enum kobj_ns_type {
  * 172856eac7cf ("kobject: Export kobj_ns_grab_current() and kobj_ns_drop()";
  * v4.16).
  */
-static inline void *kobj_ns_grab_current(enum kobj_ns_type type)
+static inline void *kobj_ns_grab_current_backport(enum kobj_ns_type type)
 {
 	WARN_ON_ONCE(type != KOBJ_NS_TYPE_NET);
 	return &init_net;
 }
 
-static inline void kobj_ns_drop(enum kobj_ns_type type, void *ns)
+static inline void kobj_ns_drop_backport(enum kobj_ns_type type, void *ns)
 {
 }
+
+#define kobj_ns_grab_current kobj_ns_grab_current_backport
+#define kobj_ns_drop kobj_ns_drop_backport
 #endif
 
 /* <linux/kref.h> */