Unlike Red Hat (or practically any other distribution), Caldera certifies that the source code shipped with the distribution is the source code used to build the kernel that was shipped with the distribution.

This quality issue is a primary reason why Caldera stopped distributing Red Hat and started producing their own distribution, and is one of their primary "value adds".

Further, I do not incorporate into the kernel any code from outside the Caldera distribution unless absolutely necessary for some special purpose. I'm not a hobbyist, you know.

On the other hand, I don't see why the kernel should carry SMP on a single processor system, or have hooks for a zillion modules and capabilities that will never be used. Rebuilding the kernel is very easy, so why not clean it up?