}

func (s *mspan) pinnerBitSize() uintptr {
	return divRoundUp(uintptr(s.nelems)*2, 8)
}

// newPinnerBits returns a pointer to 8 byte aligned bytes to be used for this
// span's pinner bits. newPinnerBits is used to mark objects that are pinned.
// They are copied when the span is swept.
func (s *mspan) newPinnerBits() *pinnerBits {
	return (*pinnerBits)(newMarkBits(uintptr(s.nelems) * 2))
}