simplify gendisk and request_queue allocation for blk-mq based drivers

[Konrad Rzeszutek Wilk]

On Wed, Jun 02, 2021 at 09:53:15AM +0300, Christoph Hellwig wrote:
> Hi all,

Hi!

You wouldn't have a nice git repo to pull so one can test it easily?

Thank you!

Cc-ing Boris/Juergen - pls see below xen.
> 
> this series is the scond part of cleaning up lifetimes and allocation of
> the gendisk and request_queue structure.  It adds a new interface to
> allocate the disk and queue together for blk based drivers, and uses that
> in all drivers that do not have any caveats in their gendisk and
> request_queue lifetime rules.
> 
> Diffstat:
>  block/blk-mq.c                      |   91 +++++++++++++++-------------------
>  block/blk.h                         |    1 
>  block/elevator.c                    |    2 
>  drivers/block/amiflop.c             |   16 +-----
>  drivers/block/aoe/aoeblk.c          |   33 ++++--------
>  drivers/block/aoe/aoedev.c          |    3 -
>  drivers/block/ataflop.c             |   16 +-----
>  drivers/block/floppy.c              |   20 +------
>  drivers/block/loop.c                |   19 ++-----
>  drivers/block/nbd.c                 |   53 +++++++------------
>  drivers/block/null_blk/main.c       |   11 +---
>  drivers/block/paride/pcd.c          |   19 +++----
>  drivers/block/paride/pd.c           |   30 ++++-------
>  drivers/block/paride/pf.c           |   18 ++----
>  drivers/block/ps3disk.c             |   36 +++++--------
>  drivers/block/rbd.c                 |   52 ++++++-------------
>  drivers/block/rnbd/rnbd-clt.c       |   35 +++----------
>  drivers/block/sunvdc.c              |   47 ++++-------------
>  drivers/block/swim.c                |   34 +++++-------
>  drivers/block/swim3.c               |   33 +++++-------
>  drivers/block/sx8.c                 |   23 ++------
>  drivers/block/virtio_blk.c          |   26 ++-------
>  drivers/block/xen-blkfront.c        |   96 ++++++++++++++----------------------
>  drivers/block/z2ram.c               |   15 +----
>  drivers/cdrom/gdrom.c               |   45 +++++++---------
>  drivers/md/dm-rq.c                  |    9 +--
>  drivers/memstick/core/ms_block.c    |   25 +++------
>  drivers/memstick/core/mspro_block.c |   26 ++++-----
>  drivers/mtd/mtd_blkdevs.c           |   48 ++++++++----------
>  drivers/mtd/ubi/block.c             |   68 ++++++++++---------------
>  drivers/s390/block/scm_blk.c        |   21 ++-----
>  include/linux/blk-mq.h              |   24 ++++++---
>  include/linux/elevator.h            |    1 
>  33 files changed, 386 insertions(+), 610 deletions(-)