kcopy_nta
error = kcopy_nta(p, iov->iov_base, cnt,
error = kcopy_nta(iov->iov_base, p, cnt,
error = kcopy_nta(p, iov->iov_base, cnt,
error = kcopy_nta(iov->iov_base, p, cnt,
int kcopy_nta(const void *, void *, size_t, int);