Working on the Linux Kernel Janitors project, and following up on Mikal
  Still's work there, I'd like to submit a patch for the Macintosh ANS
  LCD driver.

  I believe from Mikal's Patches page that his previous patch was rejected
  due to not cleaning up properly. I believe my patch addresses this issue,
  by calling iounmap() to free the IO remapping created by ioremap() earlier
  in the function, if the call to misc_register() fails for any reason.

  Unfortunately I don't know how to get this driver to compile on my
  machine, and therefore I can't even check that my patch compiles. If you
  can advise me how to set my machine up to dompile these drivers, then
  please get in touch =) I hope I didn't make any stupid mistakes in this
  patch either.