From 11d56f4129c9eed56a103faae8727548c256ee5c Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Mon, 25 Mar 2019 04:19:24 +0000
Subject: [PATCH] scst/include/backport.h: Fix the timer_setup() backport and
 add a from_timer() backport

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8070 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index a4d0a8d87..7715ffbe1 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -1170,10 +1170,10 @@ struct t10_pi_tuple {
 
 /*
  * See also commit 686fef928bba ("timer: Prepare to change timer callback
- * argument type"). See also commit 0eeda71bc30d ("timer: Replace timer base
- * by a cpu index").
+ * argument type") # v4.14. See also commit 0eeda71bc30d ("timer: Replace
+ * timer base by a cpu index") # v4.2.
  */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
 #define timer_setup(_timer, _fn, _flags) do {			\
 	init_timer(_timer);					\
 	(_timer)->function = (void *)(_fn);	\
@@ -1189,6 +1189,11 @@ struct t10_pi_tuple {
 } while (0)
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
+#define from_timer(var, callback_timer, timer_fieldname)		\
+	container_of(callback_timer, typeof(*var), timer_fieldname)
+#endif
+
 /*
  * See also commit 1d27e3e2252b ("timer: Remove expires and data arguments
  * from DEFINE_TIMER").