blk_failfast_driver(rq))
#define blk_rq_started(rq) ((rq)->cmd_flags & REQ_STARTED)
#define blk_rq_io_stat(rq) ((rq)->cmd_flags & REQ_IO_STAT)
+#define blk_rq_quiet(rq) ((rq)->cmd_flags & REQ_QUIET)
#define blk_account_rq(rq) (blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq)))