To apply all patches:
=====================
fakeroot make -f debian/rules patch

To create a new patch:
*create an directory with the unpatch source
*create a directory with the patched source
*run diff -urN directory.orig/file directory.patched/file > my_patch
*Check if this file is patched already by examining the patches in 
 debian/patches/
 +if yes replace the the patch (part) there with your patch from my_patch and
  do not forget to update the first lines (comments) with a brief note about
  your patch
 +if no move "my_patch" to debian/patches and add the filename of your patch
  to debian/patches/00list. Please note, that the format ##_patchname.dpatch
  is currently used, so the name my_patch could become "30_mypatch.dpatch".

To remove a patch:
==================
*Remove the appropriate line in debian/patches/00list before building.
*If necessary, fix up follow up patches (should be necessary only seldom)

For a complete description, see dpatch(1)

Please note that linuxinfo is heavily patched and abandoned upstream.