abd_copy_from_buf
abd_copy_from_buf(data, lr + 1, lr->lr_length);
extern inline void abd_copy_from_buf(abd_t *abd, const void *buf, size_t size);
abd_copy_from_buf(abd, buf, n);
abd_copy_from_buf(hdr->b_l1hdr.b_pabd,
abd_copy_from_buf(hdr->b_l1hdr.b_pabd, buf->b_data,
abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));
abd_copy_from_buf(ub_abd, &spa->spa_uberblock, sizeof (uberblock_t));
abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));