Chrooting to tmpfs in init

[Mark Lee <mark@xxxxxxxxxxxx>]

Salutations,

I've been wondering if it's possible to chroot to a tmpfs instead of a
partition in init. I'd like to decompress a 7zip root archive into a tmpfs
and use that as root. This is different from using aufs2. Any suggestions
as how I would go about doing this?

Regards,
Mark