> do you have idea on how to achieve the same
> (for mounts, swap devices, raidframe, and potentially other subsystems;
> that's the tricky part ;) with struct specinfo or struct disk?
> 
> -e.

for example, add a flag to VOP_OPEN and VOP_CLOSE (and corresponding
device driver entries) to say "it's open for mount" (or swap, etc)
so that the info can be maintained in a similar way to openmasks.

YAMAMOTO Takashi