Merge tag 'jfs-6.5' of github.com:kleikamp/linux-shaggy

Pull jfs updates from David Kleikamp:
 "Minor bug fixes and cleanups"

* tag 'jfs-6.5' of github.com:kleikamp/linux-shaggy:
  FS: JFS: Check for read-only mounted filesystem in txBegin
  FS: JFS: Fix null-ptr-deref Read in txBegin
  fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev
  fs: jfs: (trivial) Fix typo in dbInitTree function
  jfs: jfs_dmap: Validate db_l2nbperpage while mounting