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>

1 files changed, 2 insertions, 2 deletions

diff --git a/block/elevator.c b/block/elevator.c
index ef7f59469acc..dba9be891a6b 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -634,7 +634,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
 
         if (rq->rq_flags & RQF_SOFTBARRIER) {
                 /* barriers are scheduling boundary, update end_sector */
-                if (rq->cmd_type == REQ_TYPE_FS) {
+                if (!blk_rq_is_passthrough(rq)) {
                         q->end_sector = rq_end_sector(rq);
                         q->boundary_rq = rq;
                 }
@@ -676,7 +676,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where)
                 if (elv_attempt_insert_merge(q, rq))
                         break;
         case ELEVATOR_INSERT_SORT:
-                BUG_ON(rq->cmd_type != REQ_TYPE_FS);
+                BUG_ON(blk_rq_is_passthrough(rq));
                 rq->rq_flags |= RQF_SORTED;
                 q->nr_sorted++;
                 if (rq_mergeable(rq)) {