All files except driver.c are snapshots from the HP-UX kernel.  They've
  been modified as little as possible.  Even though they don't fit the
  Linux coding style, please leave them in their funny format just in case
  someone in the future, with access to HP-UX source code, is generous
  enough to update our copies with later changes from HP-UX -- it'll
  make their 'diff' job easier if our code is relatively unmodified.
  
  Required Disclaimer: Hewlett-Packard makes no implied or expressed
  warranties about this code nor any promises to maintain or test it
  in any way.  This copy of this snapshot is no longer the property
  of Hewlett-Packard.