Hi! Sorry, i was not in cc, so I'll reply in this way :) +static const struct vsock_transport * +vsock_dgram_lookup_transport(unsigned int cid, __u8 flags) +{ + const struct vsock_transport *transport; + + transport = vsock_connectible_lookup_transport(cid, flags); + if (transport) + return transport; + + return transport_dgram_fallback; +} + ^^^ I guess this must be under EXPORT_SYMBOL, because it is called from virtio_transport_common.c, so module build fails. Thanks