drivers: use req op accessor

The req operation REQ_OP is separated from the rq_flag_bits
definition. This converts the block layer drivers to
use req_op to get the op from the request struct.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 36cddab..9fb26f2 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -1,7 +1,10 @@
 #ifndef MMC_QUEUE_H
 #define MMC_QUEUE_H
 
-#define MMC_REQ_SPECIAL_MASK	(REQ_DISCARD | REQ_FLUSH)
+static inline bool mmc_req_is_special(struct request *req)
+{
+	return req && (req->cmd_flags & REQ_FLUSH || req_op(req) == REQ_OP_DISCARD);
+}
 
 struct request;
 struct task_struct;