>> Can we just integrate it into the normal kernel build Makefile the way 
>> it's done in userland?

I'm all for autogenerating .d's

>The patch below does it - but uses -MD (to autogenerate the .d files),
>it might need other bits of my auto-depend stuff.

Why such a complex patch? and why generate the .d's as a separate action
to compiling the .o's ?  Ie. what's wrong with simply adding -MD
to CFLAGS/CPPFLAGS ?

Thanks
--sjg