I've been plagued by this one problem for a long time now. As it came
across today, I pinpointed it.
If you're using a new kernel (errata 2.2.16-3, ext2 2.2.17-5) on older
system (RH60), compiling SMP modules (e.g. external network
drivers from ftp.scyld.com) will fail because SMP related issues are not
defined and modules are compiled for UP. Manually defining -D__SMP__ or
friends won't help either because other stuff is left out too.
This is caused by the fact that those errata kernels don't
Require: initscripts new enough which create /boot/kernel.h at boot.
Updated initscripts would be probably too much to ask, but _please_ at
Require: decent initscript versions :-)
*** Bug 20026 has been marked as a duplicate of this bug. ***