//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname mapiterinit
func mapiterinit(t *maptype, h *hmap, it *hiter) {
	if raceenabled && h != nil {
		callerpc := getcallerpc()
		racereadpc(unsafe.Pointer(h), callerpc, abi.FuncPCABIInternal(mapiterinit))
	}

	it.t = t
	if h == nil || h.count == 0 {
		return
	}