/* copy from ds while checksumming, otherwise like csum_partial  */
__wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum)
/* copy from ds while checksumming, otherwise like csum_partial  */
__wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum)
{
	memcpy(dst, src, len);
	return csum_partial(dst, len, sum);
}