> Each time you re-sup the source, you
> might have to re-config your kernel. It might be that you don't have to
> change the kernel config file itself, but you still have to run config.

It would be also neccessary to update /usr/sbin/config because the
syntax is (has been) changed occationally.   If newly obtained source
codes are config'ed with old one, you would go a bunch of syntax errors.

Tohru Nishimura
Nara Institute of Science and Technology