Factor it out and add a comment.

Cc: "Michael S. Tsirkin" <address@hidden>
Cc: Murilo Opsfelder Araujo <address@hidden>
Cc: Greg Kurz <address@hidden>
Cc: Eduardo Habkost <address@hidden>
Cc: "Dr. David Alan Gilbert" <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
---