On 05/24/2017 02:34 AM, Bart Van Assche wrote:
> Several block drivers need to initialize the driver-private data
> after having called blk_get_request() and before .prep_rq_fn() is
> called, e.g. when submitting a REQ_OP_SCSI_* request. Avoid that
> that initialization code has to be repeated after every
> blk_get_request() call by adding a new callback function to struct
> request_queue.
> 
> Signed-off-by: Bart Van Assche <[email protected]>
> Cc: Jens Axboe <[email protected]>
> Cc: Christoph Hellwig <[email protected]>
> Cc: Omar Sandoval <[email protected]>
> Cc: Hannes Reinecke <[email protected]>
> Cc: [email protected]
> ---
>  block/blk-core.c       | 3 +++
>  block/blk-mq.c         | 3 +++
>  include/linux/blkdev.h | 4 ++++
>  3 files changed, 10 insertions(+)
> 
Reviewed-by: Hannes Reinecke <[email protected]>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Teamlead Storage & Networking
[email protected]                                   +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)

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