cleanup updating the size of block devices v3

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Subject: cleanup updating the size of block devices v3
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 16 Nov 2020 15:56:51 +0100
Cc: Justin Sanders <justin@xxxxxxxxxx>, Mike Snitzer <snitzer@xxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, linux-nvme@xxxxxxxxxxxxxxxxxxx, Song Liu <song@xxxxxxxxxx>, dm-devel@xxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Ilya Dryomov <idryomov@xxxxxxxxx>, Jack Wang <jinpu.wang@xxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, nbd@xxxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, Stefan Hajnoczi <stefanha@xxxxxxxxxx>, drbd-dev@xxxxxxxxxxxxxxx, ceph-devel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>

Hi Jens,

this series builds on top of the work that went into the last merge window,
and make sure we have a single coherent interfac for updating the size of a
block device.

Changes since v2:
 - rebased to the set_capacity_revalidate_and_notify in mainline
 - keep the loop_set_size function
 - fix two mixed up acks
 
Changes since v1:
 - minor spelling fixes

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Follow-Ups:
- [PATCH 03/78] nvme: let set_capacity_revalidate_and_notify update the bdev size
  - From: Christoph Hellwig
- [PATCH 17/78] rnbd: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 16/78] rbd: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 10/78] nbd: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 02/78] loop: let set_capacity_revalidate_and_notify update the bdev size
  - From: Christoph Hellwig
- [PATCH 15/78] drbd: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 18/78] zram: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 13/78] pktcdvd: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 05/78] block: remove the update_bdev parameter to set_capacity_revalidate_and_notify
  - From: Christoph Hellwig
- [PATCH 20/78] md: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 19/78] dm-raid: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 12/78] dm: use set_capacity_and_notify
  - From: Christoph Hellwig
- [PATCH 14/78] nvme: use set_capacity_and_notify in nvme_set_queue_dying
  - From: Christoph Hellwig
- Re: cleanup updating the size of block devices v3
  - From: Jens Axboe
- [PATCH 04/78] sd: update the bdev size in sd_revalidate_disk
  - From: Christoph Hellwig
- [PATCH 38/78] block: rework requesting modules for unclaimed devices
  - From: Christoph Hellwig
- [PATCH 22/78] virtio-blk: remove a spurious call to revalidate_disk_size
  - From: Christoph Hellwig
- [PATCH 01/78] block: remove the call to __invalidate_device in check_disk_size_change
  - From: Christoph Hellwig
- [PATCH 37/78] block: split block_class_lock
  - From: Christoph Hellwig
- [PATCH 27/78] rbd: implement ->set_read_only to hook into BLKROSET processing
  - From: Christoph Hellwig
- [PATCH 07/78] nbd: move the task_recv check into nbd_size_update
  - From: Christoph Hellwig
- [PATCH 26/78] block: add a new set_read_only method
  - From: Christoph Hellwig
- [PATCH 08/78] nbd: refactor size updates
  - From: Christoph Hellwig
- [PATCH 31/78] loop: use set_disk_ro
  - From: Christoph Hellwig
- [PATCH 24/78] mtd_blkdevs: don't override BLKFLSBUF
  - From: Christoph Hellwig
- [PATCH 32/78] block: remove set_device_ro
  - From: Christoph Hellwig
- [PATCH 34/78] block: propagate BLKROSET to all partitions
  - From: Christoph Hellwig
- [PATCH 39/78] block: add an optional probe callback to major_names
  - From: Christoph Hellwig
- [PATCH 29/78] dasd: implement ->set_read_only to hook into BLKROSET processing
  - From: Christoph Hellwig
- [PATCH 21/78] md: remove a spurious call to revalidate_disk_size in update_size
  - From: Christoph Hellwig
- [PATCH 06/78] nbd: remove the call to set_blocksize
  - From: Christoph Hellwig
- [PATCH 11/78] aoe: don't call set_capacity from irq context
  - From: Christoph Hellwig
- [PATCH 09/78] nbd: validate the block size in nbd_set_size
  - From: Christoph Hellwig
- Re: cleanup updating the size of block devices v3
  - From: Christoph Hellwig
- [PATCH 35/78] block: cleanup del_gendisk a bit
  - From: Christoph Hellwig
- [PATCH 33/78] block: remove __blkdev_driver_ioctl
  - From: Christoph Hellwig
- [PATCH 28/78] md: implement ->set_read_only to hook into BLKROSET processing
  - From: Christoph Hellwig
- [PATCH 36/78] block: open code kobj_map into in block/genhd.c
  - From: Christoph Hellwig
- [PATCH 30/78] block: don't call into the driver for BLKROSET
  - From: Christoph Hellwig
- [PATCH 23/78] block: unexport revalidate_disk_size
  - From: Christoph Hellwig
- [PATCH 64/78] dm: simplify flush_bio initialization in __send_empty_flush
  - From: Christoph Hellwig
- [PATCH 25/78] block: don't call into the driver for BLKFLSBUF
  - From: Christoph Hellwig
- [PATCH 76/78] filemap: use ->f_mapping over ->i_mapping consistently
  - From: Christoph Hellwig
- [PATCH 47/78] floppy: use a separate gendisk for each media format
  - From: Christoph Hellwig
- [PATCH 78/78] block: remove i_bdev
  - From: Christoph Hellwig
- [PATCH 52/78] block: switch gendisk lookup to a simple xarray
  - From: Christoph Hellwig
- [PATCH 70/78] block: replace bd_mutex with a per-gendisk mutex
  - From: Christoph Hellwig
- [PATCH 66/78] block: keep a block_device reference for each hd_struct
  - From: Christoph Hellwig
- [PATCH 60/78] zram: remove the claim mechanism
  - From: Christoph Hellwig
- [PATCH 74/78] block: merge struct block_device and struct hd_struct
  - From: Christoph Hellwig
- [PATCH 75/78] block: stop using bdget_disk for partition 0
  - From: Christoph Hellwig
- [PATCH 61/78] zram: do not call set_blocksize
  - From: Christoph Hellwig
- [PATCH 67/78] block: simplify the block device claiming interface
  - From: Christoph Hellwig
- [PATCH 50/78] z2ram: reindent
  - From: Christoph Hellwig
- [PATCH 68/78] block: remove ->bd_contains
  - From: Christoph Hellwig
- [PATCH 73/78] block: use put_device in put_disk
  - From: Christoph Hellwig
- [PATCH 77/78] fs: simplify the get_super_thawed interface
  - From: Christoph Hellwig
- [PATCH 72/78] block: use disk_part_iter_exit in disk_part_iter_next
  - From: Christoph Hellwig
- [PATCH 69/78] block: remove the nr_sects field in struct hd_struct
  - From: Christoph Hellwig
- [PATCH 56/78] init: refactor name_to_dev_t
  - From: Christoph Hellwig
- [PATCH 55/78] block: change the hash used for looking up block devices
  - From: Christoph Hellwig
- [PATCH 49/78] ataflop: use a separate gendisk for each media format
  - From: Christoph Hellwig
- [PATCH 57/78] init: refactor devt_from_partuuid
  - From: Christoph Hellwig
- [PATCH 63/78] bcache: remove a superflous lookup_bdev all
  - From: Christoph Hellwig
- [PATCH 71/78] block: add a bdev_kobj helper
  - From: Christoph Hellwig
- [PATCH 51/78] z2ram: use separate gendisk for the different modes
  - From: Christoph Hellwig
- [PATCH 58/78] init: cleanup match_dev_by_uuid and match_dev_by_label
  - From: Christoph Hellwig
- [PATCH 53/78] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats
  - From: Christoph Hellwig
- [PATCH 62/78] loop: do not call set_blocksize
  - From: Christoph Hellwig
- [PATCH 65/78] dm: remove the block_device reference in struct mapped_device
  - From: Christoph Hellwig
- [PATCH 48/78] amiflop: use separate gendisks for Amiga vs MS-DOS mode
  - From: Christoph Hellwig
- [PATCH 59/78] mtip32xx: remove the call to fsync_bdev on removal
  - From: Christoph Hellwig
- [PATCH 54/78] block: remove a duplicate __disk_get_part prototype
  - From: Christoph Hellwig
- [PATCH 45/78] md: use __register_blkdev to allocate devices on demand
  - From: Christoph Hellwig
- [PATCH 44/78] loop: use __register_blkdev to allocate devices on demand
  - From: Christoph Hellwig
- [PATCH 46/78] ide: switch to __register_blkdev for command set probing
  - From: Christoph Hellwig
- [PATCH 41/78] swim: don't call blk_register_region
  - From: Christoph Hellwig
- [PATCH 42/78] sd: use __register_blkdev to avoid a modprobe for an unregistered dev_t
  - From: Christoph Hellwig
- [PATCH 40/78] ide: remove ide_{,un}register_region
  - From: Christoph Hellwig
- [PATCH 43/78] brd: use __register_blkdev to allocate devices on demand
  - From: Christoph Hellwig

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