can't mount root during freebsd-update 7.0 -> 8.1 on amd64

[perryh at pluto.rain.com]

David DEMELIER <demelier.david at gmail.com> wrote:

> Here : http://ivoras.sharanet.org/freebsd/freebsd8.html
>
> GEOM_PART becomes the default slicer
>
> Status: Committed to -CURRENT
> Will appear in 8.0: sure
> Author: Marcel Moolenaar & others
> Web: commit message
>
> GEOM_PART (gpart) is a new GEOM partition class (slicer) and
> utility that rolls up support for many partitioning formats
> (MBR, BSD, GPT etc.) into a single code base.
> ...
> NOTE: Some old utilities like bsdlabel may not work if the kernel
> doesn't include GEOM_BSD and other old slicer classes. In other
> words, bsdlabel et al don't work with GEOM_PART.

Does this mean that, in 8.1-RELEASE, bsdlabel/disklabel will not work
with the GENERIC kernel (which includes GEOM_PART_GPT and GEOM_LABEL,
but no other GEOM_ pieces AFAICT)?