This contains hpfs fixes from my source ported to 2.6.7 kernel:

updates:
- allocator fragments files less
- OS/2 Warp Server filesystem can be mounted read/only
- added reschedule points so that it doesn't hog CPU

bug fixes:
- filesystem error message when syncing or fsyncing deleted file (or when
  system just writes it on its own)
- filesystem error on extremly fragmented files
- corrupted disk structures could possibly corrupt memory