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block: introduce blk_rq_is_passthrough

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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 <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-01-31 16:57:29 +01:00 • committed by Jens Axboe
commit 57292b58dd
21 changed files with 59 additions and 53 deletions
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block/blk-exec.c
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@ -51,7 +51,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
WARN_ON(irqs_disabled());
WARN_ON(rq->cmd_type == REQ_TYPE_FS);
WARN_ON(!blk_rq_is_passthrough(rq));
rq->rq_disk = bd_disk;
rq->end_io = done;