From b0e5d9834e89aa2c4843536c956373d94f5a50d5 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 6 Nov 2018 02:33:16 +0000
Subject: [PATCH 1/2] scst: Add an IOCB_DSYNC backport for kernel versions <
 v4.7

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7798 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index 2c715f7db..bd5cd22cc 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -349,6 +349,11 @@ static inline int vfs_fsync_backport(struct file *file, int datasync)
 #define vfs_fsync vfs_fsync_backport
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
+/* See also commit dde0c2e79848 ("fs: add IOCB_SYNC and IOCB_DSYNC") */
+#define IOCB_DSYNC 0
+#endif
+
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0) && \
 	LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)
 /*

From c2f8864d90b2b4e48995fa5fb806ab3611a3f64c Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 6 Nov 2018 03:11:44 +0000
Subject: [PATCH 2/2] scst/include/backport.h: Fix the <linux/eventpoll.h>
 backport

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7799 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index bd5cd22cc..f4e9e6846 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -301,22 +301,29 @@ enum {
 /* <linux/eventpoll.h> */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
-typedef unsigned int __bitwise __poll_t;
+/*
+ * See also commit 65aaf87b3aa2 ("add EPOLLNVAL, annotate EPOLL... and
+ * event_poll->event").
+ */
+typedef unsigned int __poll_t;
+#define EPOLLNVAL	POLLNVAL
 #endif
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)
-#define EPOLLIN		(__force __poll_t)POLLIN
-#define EPOLLPRI	(__force __poll_t)POLLPRI
-#define EPOLLOUT	(__force __poll_t)POLLOUT
-#define EPOLLERR	(__force __poll_t)POLLERR
-#define EPOLLHUP	(__force __poll_t)POLLHUP
-#define EPOLLNVAL	(__force __poll_t)POLLNVAL
-#define EPOLLRDNORM	(__force __poll_t)POLLRDNORM
-#define EPOLLRDBAND	(__force __poll_t)POLLRDBAND
-#define EPOLLWRNORM	(__force __poll_t)POLLWRNORM
-#define EPOLLWRBAND	(__force __poll_t)POLLWRBAND
-#define EPOLLMSG	(__force __poll_t)POLLMSG
-#define EPOLLRDHUP	(__force __poll_t)POLLRDHUP
+/*
+ * See also commit 7e040726850a ("eventpoll.h: add missing epoll event masks").
+ */
+#define EPOLLIN		POLLIN
+#define EPOLLPRI	POLLPRI
+#define EPOLLOUT	POLLOUT
+#define EPOLLERR	POLLERR
+#define EPOLLHUP	POLLHUP
+#define EPOLLRDNORM	POLLRDNORM
+#define EPOLLRDBAND	POLLRDBAND
+#define EPOLLWRNORM	POLLWRNORM
+#define EPOLLWRBAND	POLLWRBAND
+#define EPOLLMSG	POLLMSG
+#define EPOLLRDHUP	POLLRDHUP
 #endif
 
 /* <linux/fs.h> */