+/* blk_queue_discard() is available */
+#undef HAVE_BLK_QUEUE_DISCARD
+
+/* blk_queue_flush() is available */
+#undef HAVE_BLK_QUEUE_FLUSH
+
+/* blk_queue_flush() is GPL-only */
+#undef HAVE_BLK_QUEUE_FLUSH_GPL_ONLY
+
+/* blk_queue_io_opt() is available */
+#undef HAVE_BLK_QUEUE_IO_OPT
+
+/* blk_queue_max_hw_sectors() is available */
+#undef HAVE_BLK_QUEUE_MAX_HW_SECTORS
+
+/* blk_queue_max_segments() is available */
+#undef HAVE_BLK_QUEUE_MAX_SEGMENTS
+
+/* blk_queue_nonrot() is available */
+#undef HAVE_BLK_QUEUE_NONROT
+
+/* blk_queue_physical_block_size() is available */
+#undef HAVE_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
+