[gentoo-user] systemd and kernel symbol HOTPLUG

The premerge check for systemd complains that CONFIG_HOTPLUG is not
set.
grep .config does not show "CONFIG_HOTPLUG"

make menuconfig when asked to search for HOTPLUG shows that is has the
value HOTPLUG (?).  It also asserts that HOTPLUG is "selected by"
a Boolean combination of flags all of which are true (and none are
negated).

What gives?

thanks,
allan