Christoph Hellwig 6d247d7f71 block: allow specifying size for extra command data
This mirrors the blk-mq capabilities to allocate extra drivers-specific
data behind struct request by setting a cmd_size field, as well as having
a constructor / destructor for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-01-27 15:08:35 -07:00
..
2016-10-28 08:45:17 -06:00
2017-01-17 10:03:42 -07:00
2016-12-14 10:49:33 -08:00
2017-01-27 15:03:01 -07:00