block: introduce blk_rq_is_passthrough
This can be used to check for fs vs non-fs requests and basically
removes all knowledge of BLOCK_PC specific from the block layer,
as well as preparing for removing the cmd_type field in struct request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 6abd739..c771d4c 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1265,7 +1265,7 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
*/
static int atapi_drain_needed(struct request *rq)
{
- if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
+ if (likely(!blk_rq_is_passthrough(rq)))
return 0;
if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))