Unregister a previously registered buffer
ring
# DESCRIPTION
The [io_uring_unregister_buf_ring] function unregisters a
previously registered shared buffer ring indicated by *bgid*.
# RETURN VALUE
On success [io_uring_unregister_buf_ring] returns 0. On failure it
returns **-errno**.
# SEE ALSO
[io_uring_register_buf_ring], [io_uring_free_buf_ring]