Porting Notes: * Not required for Linux since the zone is always global. But we'll want this change if we start using the zones code. Authored by: Andy Fiddaman <omnios@citrus-it.co.uk> Reviewed by: Jason King <jason.king@joyent.com> Reviewed by: Sebastien Roy <sebastien.roy@delphix.com> Reviewed by: Tom Caputi <tcaputi@datto.com> Approved by: Joshua M. Clulow <josh@sysmgr.org> Ported-by: Brian Behlendorf <behlendorf1@llnl.gov> OpenZFS-issue: https://www.illumos.org/issues/9880 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/bc4c0ff134 Closes #8189