The CAM system has it's own ideas of what locks are to be held by whom.
So do GEOM. Not a pretty sight.

Take all the interesting stuff out of GEOM::disk_create(), and leave just
the creation of the fake dev_t. Schedule the topology munging to happen
in the g_event thread with g_call_me().

This makes disk_create() pretty lock-agnostic, almost lock-atheist.

Tripped over by: peter
Sponsored by: DARPA & NAI Labs