Function abd_borrow_buf

freebsd/contrib/openzfs/module/zfs/abd.c:637–650

* Borrow a raw buffer from an ABD without copying the contents of the ABD * into the buffer. If the ABD is scattered, this will allocate a raw buffer * whose contents are undefined. To copy over the existing data in the ABD, use * abd_borrow_buf_copy() instead. */

 * abd_borrow_buf_copy() instead.
 */
void *
abd_borrow_buf(abd_t *abd, size_t n)
{
	void *buf;
	abd_verify(abd);
	ASSERT3U(abd->abd_size, >=, n);
	if (abd_is_linear(abd)) {
		buf = abd_to_buf(abd);
	} else {
		buf = zio_buf_alloc(n);
	}
	(void) zfs_refcount_add_many(&abd->abd_children, n, buf);
	return (buf);
}

void *
abd_borrow_buf_copy(abd_t *abd, size_t n)