On Mon, 7 Feb 2022 11:07:39 +0100 Hans Schultz <schultz.hans@xxxxxxxxx> wrote: > --- a/include/uapi/linux/if_link.h > +++ b/include/uapi/linux/if_link.h > @@ -532,6 +532,7 @@ enum { > IFLA_BRPORT_GROUP_FWD_MASK, > IFLA_BRPORT_NEIGH_SUPPRESS, > IFLA_BRPORT_ISOLATED, > + IFLA_BRPORT_LOCKED, > IFLA_BRPORT_BACKUP_PORT, > IFLA_BRPORT_MRP_RING_OPEN, Adding new element in middle of enum causes them to be renumbered. That breaks the kernel ABI. Please add only at end.