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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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2
drivers/ata/libata-scsi.c
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@ -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)))