const runtime.spanScanUnowned

5 uses

	runtime (current package)
		mgcmark_greenteagc.go#L82: 	spanScanUnowned  spanScanOwnership = 0         // Indicates the span is not acquired for scanning.
		mgcmark_greenteagc.go#L148: 	case spanScanUnowned:
		mgcmark_greenteagc.go#L150: 		if imb.owned.or(spanScanOneMark) == spanScanUnowned {
		mgcmark_greenteagc.go#L160: 		return imb.owned.or(spanScanManyMark) == spanScanUnowned
		mgcmark_greenteagc.go#L174: 	return spanScanOwnership(atomic.Xchg8((*uint8)(unsafe.Pointer(&imb.owned)), uint8(spanScanUnowned)))