ocfs2: drop the BLKDEV_IFL_WAIT flag

Commit dd3932eddf ("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>

fs/ocfs2/file.c

@@ -187,8 +187,7 @@ static int ocfs2_sync_file(struct file *file, int datasync)
 		 * platter
 		 */
 		if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
-			blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL,
+			blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
-					   NULL, BLKDEV_IFL_WAIT);
 		goto bail;
 	}