This is an actual functional change as we now plumb through the sync FD instead of doing a vkQueueSubmit and trusting in implicit sync. Reviewed-by: Eric Engestrom <eric@engestrom.ch> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> Tested-by: Roman Stratiienko <r.stratiienko@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14372>