extract_iter_to_sg
plen = extract_iter_to_sg(&msg->msg_iter, len, &sgtable,
err = extract_iter_to_sg(&msg->msg_iter, seglen, &rsgl->sgl.sgt,
err = extract_iter_to_sg(&msg->msg_iter, LONG_MAX,
rc = extract_iter_to_sg(iter, count, &sgtable,
ret = extract_iter_to_sg(iter, iov_iter_count(iter), sgt, max_sg, 0);
ssize_t extract_iter_to_sg(struct iov_iter *iter, size_t len,
EXPORT_SYMBOL_GPL(extract_iter_to_sg);