From 26c47ffc4ecf5610946361376a079d1ad52a0793 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Sun, 13 Jan 2019 21:10:46 +0000
Subject: [PATCH] scst: Provide a definition for bdev_io_opt() for kernel
 versions < v2.6.32

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7878 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index 4ed3cc485..26604c190 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -119,6 +119,14 @@ static inline unsigned int queue_max_hw_sectors(struct request_queue *q)
 }
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
+/* See also commit ac481c20ef8f ("block: Topology ioctls") # v2.6.32 */
+static inline int bdev_io_opt(struct block_device *bdev)
+{
+	return 0;
+}
+#endif
+
 /* <linux/blk-mq.h> */
 
 static inline unsigned int scst_blk_rq_cpu(struct request *rq)