there's only one that i know of, called ansi2knr. Ive built it and run 
it, and it's okay, but i dont think id want to pump kernel code through 
it :-)
(better would be to have kernel code written in k&r C again *grin* 
*ducks to avoid large heavy ojects thrown in my direction* ) 
i have the source if anybody wants it. 

> Just yesterday I stumbled on a CUG abstract for a utility which translates
> ANSI C to K&R for solving exactly this problem.  I forget the name, but
> anyway, does this sound familiar to anyone and if so do they know if it's
> any good?
> 
> John Wilson
> D Bit

happy hacking,
isildur