o Having .config depend on all Config.in's via a find is
  annoying, since it causes a long break before "make" actually
  gets going. Comment it out for now.

o Fix some "make -j" issues with generating module versions.

o Unify "make distclean" and "make mrproper", they were doing nearly the
  same thing anyway.

o Use the new "make clean" infrastructure for arch/i386/boot/ and
  scripts/

o Reorganize the "make clean" stuff a little, do the 
  find -name '*.[oas]' | xargs rm -f from the top-level Makefile again
  and only use the per-subdir rule for special cases like generated files,
  host-progs and the like.