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-rw-r--r--include/linux/blkdev_compat.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h
index 42b474b15..e263dc836 100644
--- a/include/linux/blkdev_compat.h
+++ b/include/linux/blkdev_compat.h
@@ -305,12 +305,23 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
* The existence of these flags implies that REQ_FLUSH an REQ_FUA are
* defined. Thus we can safely define VDEV_REQ_FLUSH and VDEV_REQ_FUA
* compatibility macros.
+ *
+ * Linux 4.8 renamed the REQ_FLUSH to REQ_PREFLUSH but there was no
+ * functional change in behavior.
*/
#ifdef WRITE_FLUSH_FUA
+
#define VDEV_WRITE_FLUSH_FUA WRITE_FLUSH_FUA
+#ifdef REQ_PREFLUSH
+#define VDEV_REQ_FLUSH REQ_PREFLUSH
+#define VDEV_REQ_FUA REQ_FUA
+#else
#define VDEV_REQ_FLUSH REQ_FLUSH
#define VDEV_REQ_FUA REQ_FUA
+#endif
+
#else
+
#define VDEV_WRITE_FLUSH_FUA WRITE_BARRIER
#ifdef HAVE_BIO_RW_BARRIER
#define VDEV_REQ_FLUSH (1 << BIO_RW_BARRIER)
@@ -319,6 +330,7 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
#define VDEV_REQ_FLUSH REQ_HARDBARRIER
#define VDEV_REQ_FUA REQ_FUA
#endif
+
#endif
/*