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block: split scsi_request out of struct request

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And require all drivers that want to support BLOCK_PC to allocate it
as the first thing of their private data.  To support this the legacy
IDE and BSG code is switched to set cmd_size on their queues to let
the block layer allocate the additional space.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-01-27 09:46:29 +01:00 • committed by Jens Axboe
commit 82ed4db499
49 changed files with 458 additions and 410 deletions
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drivers/ata/libata-scsi.c
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@ -1271,7 +1271,7 @@ static int atapi_drain_needed(struct request *rq)
if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
return 0;
return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
}
static int ata_scsi_dev_config(struct scsi_device *sdev,