_kern_unreserve_address_range
extern status_t _kern_unreserve_address_range(addr_t address, addr_t size);
_kern_unreserve_address_range(fLastAreaTop, fLastAreaReservedTop - fLastAreaTop);
_kern_unreserve_address_range(lastTop, reservedTop - lastTop);
_kern_unreserve_address_range((addr_t)reservedBase, kHeapReservationSize);
_kern_unreserve_address_range(reservedAddress, reservedSize);
_kern_unreserve_address_range(reservedAddress, reservedSize);
return _kern_unreserve_address_range(newAreaBase, reserveSize);
status = _kern_unreserve_address_range(newAreaBase + reserveSize, reserveSize);