At this point, the kernel is prepped and ready, but if you reboot now, your system won't come back up due to device file system errors. The problem is that TimeSys Linux depends on the devfs file system.
# rpmbuild -ba rpm.spec 
This should build the devfs package and place it in /usr/src/redhat/RPMS/i386/. You can then install this RPM by typing:
# rpm -Uvh /usr/src/redhat/RPMS/i386/devfsd-1.3.25-1.i386.rpm
Normally, you would now need to add the line /sbin/devfsd /dev into /etc/rc.d/rc.sysinit, but Red Hat Linux 9 should already have done this for you during installation.
If your system can't find rpmbuild, you may need to install the rpm-build package first.