man/io_uring_register_buf_ring.3: note 5.19 availability
@@ -124,6 +124,8 @@ or
.BR io_uring_buf_ring_advance (3)
to provide buffers, which will set these fields and update the tail.
+Available since 5.19.
+
.SH RETURN VALUE
On success
.BR io_uring_register_buf_ring (3)
