rebuild 2.4.21-20 kernel - can I use config from 2.4.21-15 ?

[Alois Treindl <alois astro ch>]

RHEL U3 comes with kernel 2.4.21-20

I always need to rebuild my own kernel for each new release because I 
need some extra drivers in it, which I prefer compiled-in.

Now this new kernel includes some extra features, like ExecShield support.

Can I use the .config file from my previous kernel build or are there 
new kernel config options which I need to activate?

If yes, which are they?


Alois