* Allows waiting until all spans are "assigned" or "unassigned" * Current implementation use a polling loop with sleep * Future implementation may block on sysfs attribute (like waitfor_xpds is blocking on sysfs Astribanks attribute) Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com> Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>