acpiwmibus at acpiwmi0 not configured

[Edgar Fuß]

I notice a line
        acpiwmibus at acpiwmi0 not configured
in the autoconf messages.
Indeed, my kernel config has
        acpiwmi* at acpi?
and
        wmidell* at acpiwmibus?
but no attachment for any acpiwmibus, nor does any other kernel config.

Is there something magic about acpiwmibus or are the configs simply missing 
an appropriate line?