This modifies the following files: -

  Documentation/Docbook/Makefile - Fix dependencies generating parportbook
  which caused tex to choke.

  Documentation/Docbook/kernel-api.tmpl - Remove references to source
  files which do not contain kernel-doc comments, which caused "errors" in
  the generated documentation.

  include/linux/init.h - fix a trivial function comment to correct the
  generated documentation.

  This patch partially addresses one of the issues on the Kernel Janitor
  TODO list -

  "someone who knows DocBook, or is willing to learn, should go through
  and clean up Documentation/DocBook to kill all the warnings that occur
  during "make pdfdocs" and generally make the documents look nicer, and
  render smaller PDFs."