Merge tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:

 - disk events cleanup (Christoph)

 - gendisk and request queue allocation simplifications (Christoph)

 - bdev_disk_changed cleanups (Christoph)

 - IO priority improvements (Bart)

 - Chained bio completion trace fix (Edward)

 - blk-wbt fixes (Jan)

 - blk-wbt enable/disable fix (Zhang)

 - Scheduler dispatch improvements (Jan, Ming)

 - Shared tagset scheduler improvements (John)

 - BFQ updates (Paolo, Luca, Pietro)

 - BFQ lock inversion fix (Jan)

 - Documentation improvements (Kir)

 - CLONE_IO block cgroup fix (Tejun)

 - Remove of ancient and deprecated block dump feature (zhangyi)

 - Discard merge fix (Ming)

 - Misc fixes or followup fixes (Colin, Damien, Dan, Long, Max, Thomas,
   Yang)

* tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-block: (129 commits)
  block: fix discard request merge
  block/mq-deadline: Remove a WARN_ON_ONCE() call
  blk-mq: update hctx->dispatch_busy in case of real scheduler
  blk: Fix lock inversion between ioc lock and bfqd lock
  bfq: Remove merged request already in bfq_requests_merged()
  block: pass a gendisk to bdev_disk_changed
  block: move bdev_disk_changed
  block: add the events* attributes to disk_attrs
  block: move the disk events code to a separate file
  block: fix trace completion for chained bio
  block/partitions/msdos: Fix typo inidicator -> indicator
  block, bfq: reset waker pointer with shared queues
  block, bfq: check waker only for queues with no in-flight I/O
  block, bfq: avoid delayed merge of async queues
  block, bfq: boost throughput by extending queue-merging times
  block, bfq: consider also creation time in delayed stable merge
  block, bfq: fix delayed stable merge check
  block, bfq: let also stably merged queues enjoy weight raising
  blk-wbt: make sure throttle is enabled properly
  blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
  ...

diff --cc Documentation/admin-guide/sysctl/vm.rst
Simple merge

diff --cc block/blk-mq.c
Simple merge

diff --cc drivers/block/loop.c
index 452c743,4fb1f95..36e4312
--- 1/drivers/block/loop.c
--- 2/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@@ -2322,9 -2158,9 +2316,10 @@@ static int loop_add(struct loop_device 
        mutex_init(&lo->lo_mutex);
        lo->lo_number           = i;
        spin_lock_init(&lo->lo_lock);
 +      spin_lock_init(&lo->lo_work_lock);
        disk->major             = LOOP_MAJOR;
        disk->first_minor       = i << part_shift;
+       disk->minors            = 1 << part_shift;
        disk->fops              = &lo_fops;
        disk->private_data      = lo;
        disk->queue             = lo->lo_queue;

diff --cc drivers/md/dm.c
Simple merge

diff --cc drivers/memstick/core/ms_block.c
Simple merge

diff --cc drivers/nvme/host/core.c
Simple merge

diff --cc drivers/scsi/sd.c
Simple merge

diff --cc fs/block_dev.c
Simple merge

diff --cc fs/btrfs/volumes.c
Simple merge

diff --cc fs/fs-writeback.c
Simple merge

diff --cc include/linux/writeback.h
Simple merge

diff --cc kernel/sysctl.c
Simple merge

diff --cc mm/page-writeback.c
Simple merge