I am disturbed by the wide spread use of master/slave in Ethernet bonding. Asked the current IEEE chairs and it looks like it is already fixed "upstream".
The proper terminology is for Ethernet link aggregation in the the current standard 802.1AX 2020 revision (pay walled) for the parts formerly known as master and slave is now "Protocol Parser" and "Protocol multiplexer". Also it is not called bonding anywhere; it uses LACP only. Given the large scope of the name changes. Maybe it would be best to just convert the names all of rte_eth_bond to rte_eth_lacp and fix the master/slave references at the same time. For one brief release (20.08) keep both drivers and mark the bond on as deprecated. It would also help if all the documentation and tests were checked to see if they align with the current standard.