13609 i86xpv needs to be more careful with ao_gendisp
Reviewed by: Gordon Ross <Gordon.W.Ross@gmail.com>
Approved by: Robert Mustacchi <rm@fingolfin.org>

3196 ao_gendisp use by make is racey
Reviewed by: Hans Rosenfeld <hans.rosenfeld@nexenta.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Garrett D'Amore <garrett@damore.org>