Commit 
dd3932eddf42 ("block: remove BLKDEV_IFL_WAIT") had removed the
flag argument to blkdev_issue_flush(), but the ocfs2 merge brought in a
new one.  It didn't cause a merge conflict, so the merges silently
worked out fine, but the result didn't actually compile.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
                 * platter
                 */
                if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
-                       blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL,
-                                          NULL, BLKDEV_IFL_WAIT);
+                       blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
                goto bail;
        }