Merge tag 'ext4_for_linus-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4HEADmaster

Pull ext4 updates from Ted Ts'o:

 - A major rework of the fast commit mechanism to avoid lock contention
   and deadlocks. We also export snapshot statistics in
   /proc/fs/ext4/*/fc_info

 - Performance optimization for directory hash computation by processing
   input in 4-byte chunks and removing function pointers, along with new
   KUnit tests for directory hash

 - Cleanups in JBD2 to remove special slabs and use kmalloc() instead

 - Various bug fixes, including:
     - Early validation of donor superblock in EXT4_IOC_MOVE_EXT to
       avoid cross-fs deadlock
     - Fix for a kernel BUG in ext4_write_inline_data_end under
       data=journal
     - Fix for a NULL dereference in jbd2_journal_dirty_metadata when
       handle is aborted
     - Fix for an underflow in JBD2 fast commit block initialization
       check
     - Fix for LOGFLUSH shutdown ordering to ensure ordered data
       writeback
     - Miscellaneous fixes for error path return values and KUnit
       assertions

* tag 'ext4_for_linus-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: validate donor file superblock early in EXT4_IOC_MOVE_EXT
  ext4: fix kernel BUG in ext4_write_inline_data_end
  ext4: fix ERR_PTR(0) in ext4_mkdir()
  jbd2: remove special jbd2 slabs
  ext4: remove mention of PageWriteback
  ext4: improve str2hashbuf by processing 4-byte chunks and removing function pointers
  ext4: add Kunit coverage for directory hash computation
  ext4: fast commit: export snapshot stats in fc_info
  ext4: fast commit: add lock_updates tracepoint
  ext4: fast commit: avoid i_data_sem by dropping ext4_map_blocks() in snapshots
  ext4: fast commit: avoid self-deadlock in inode snapshotting
  ext4: fast commit: avoid waiting for FC_COMMITTING
  ext4: lockdep: handle i_data_sem subclassing for special inodes
  ext4: fast commit: snapshot inode state before writing log
  jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit()
  ext4: fix fast commit wait/wake bit mapping on 64-bit
  jbd2: check for aborted handle in jbd2_journal_dirty_metadata()
  ext4: Use %pe to print PTR_ERR()
  ext4: fix LOGFLUSH shutdown ordering to allow ordered-mode data writeback
  ext4: replace KUnit tests for memcmp() with KUNIT_ASSERT_MEMEQ()

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