Merge tag 'for-7.1/block-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block updates from Jens Axboe:

 - Add shared memory zero-copy I/O support for ublk, bypassing per-I/O
   copies between kernel and userspace by matching registered buffer
   PFNs at I/O time. Includes selftests.

 - Refactor bio integrity to support filesystem initiated integrity
   operations and arbitrary buffer alignment.

 - Clean up bio allocation, splitting bio_alloc_bioset() into clear fast
   and slow paths. Add bio_await() and bio_submit_or_kill() helpers,
   unify synchronous bi_end_io callbacks.

 - Fix zone write plug refcount handling and plug removal races. Add
   support for serializing zone writes at QD=1 for rotational zoned
   devices, yielding significant throughput improvements.

 - Add SED-OPAL ioctls for Single User Mode management and a STACK_RESET
   command.

 - Add io_uring passthrough (uring_cmd) support to the BSG layer.

 - Replace pp_buf in partition scanning with struct seq_buf.

 - zloop improvements and cleanups.

 - drbd genl cleanup, switching to pre_doit/post_doit.

 - NVMe pull request via Keith:
      - Fabrics authentication updates
      - Enhanced block queue limits support
      - Workqueue usage updates
      - A new write zeroes device quirk
      - Tagset cleanup fix for loop device

 - MD pull requests via Yu Kuai:
      - Fix raid5 soft lockup in retry_aligned_read()
      - Fix raid10 deadlock with check operation and nowait requests
      - Fix raid1 overlapping writes on writemostly disks
      - Fix sysfs deadlock on array_state=clear
      - Proactive RAID-5 parity building with llbitmap, with
        write_zeroes_unmap optimization for initial sync
      - Fix llbitmap barrier ordering, rdev skipping, and bitmap_ops
        version mismatch fallback
      - Fix bcache use-after-free and uninitialized closure
      - Validate raid5 journal metadata payload size
      - Various cleanups

 - Various other fixes, improvements, and cleanups

* tag 'for-7.1/block-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (146 commits)
  ublk: fix tautological comparison warning in ublk_ctrl_reg_buf
  scsi: bsg: fix buffer overflow in scsi_bsg_uring_cmd()
  block: refactor blkdev_zone_mgmt_ioctl
  MAINTAINERS: update ublk driver maintainer email
  Documentation: ublk: address review comments for SHMEM_ZC docs
  ublk: allow buffer registration before device is started
  ublk: replace xarray with IDA for shmem buffer index allocation
  ublk: simplify PFN range loop in __ublk_ctrl_reg_buf
  ublk: verify all pages in multi-page bvec fall within registered range
  ublk: widen ublk_shmem_buf_reg.len to __u64 for 4GB buffer support
  xfs: use bio_await in xfs_zone_gc_reset_sync
  block: add a bio_submit_or_kill helper
  block: factor out a bio_await helper
  block: unify the synchronous bi_end_io callbacks
  xfs: fix number of GC bvecs
  selftests/ublk: add read-only buffer registration test
  selftests/ublk: add filesystem fio verify test for shmem_zc
  selftests/ublk: add hugetlbfs shmem_zc test for loop target
  selftests/ublk: add shared memory zero-copy test
  selftests/ublk: add UBLK_F_SHMEM_ZC support for loop target
  ...

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