Merge tag 'block-6.19-20260102' of git://git.kernel.org/pub/scm/linux/kernel/git...

Merge tag 'block-6.19-20260102' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block fixes from Jens Axboe:

 - Scan partition tables asynchronously for ublk, similarly to how nvme
   does it. This avoids potential deadlocks, which is why nvme does it
   that way too. Includes a set of selftests as well.

 - MD pull request via Yu:
     - Fix null-pointer dereference in raid5 sysfs group_thread_cnt
       store (Tuo Li)
     - Fix possible mempool corruption during raid1 raid_disks update
       via sysfs (FengWei Shih)
     - Fix logical_block_size configuration being overwritten during
       super_1_validate() (Li Nan)
     - Fix forward incompatibility with configurable logical block size:
       arrays assembled on new kernels could not be assembled on older
       kernels (v6.18 and before) due to non-zero reserved pad rejection
       (Li Nan)
     - Fix static checker warning about iterator not incremented (Li Nan)

 - Skip CPU offlining notifications on unmapped hardware queues

 - bfq-iosched block stats fix

 - Fix outdated comment in bfq-iosched

* tag 'block-6.19-20260102' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  block, bfq: update outdated comment
  blk-mq: skip CPU offline notify on unmapped hctx
  selftests/ublk: fix Makefile to rebuild on header changes
  selftests/ublk: add test for async partition scan
  ublk: scan partition in async way
  block,bfq: fix aux stat accumulation destination
  md: Fix forward incompatibility from configurable logical block size
  md: Fix logical_block_size configuration being overwritten
  md: suspend array while updating raid_disks via sysfs
  md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()
  md: Fix static checker warning in analyze_sbs