Actually, the kernel RPM's post-install script will normally create an entry for the running kernel by name, so O-P's step shouldn't be necessary, but it won't do any harm and could save the day if something goes wrong.
Therein lies the problem. On none of my installations was there a named
kernel stanza for the original installation kernel
. It used to be that a newly installed kernel became the default, and the previously used kernel
was given a named stanza so it could still be accessed. At some point that changed, and the newly added kernel became the default and got a named stanza, both
, which would be fine if there was already a named stanza for the original install kernel, but I haven't seen that.