const golang.org/x/sys/unix.IFLA_INET6_RA_MTU one use golang.org/x/sys/unix (current package) ztypes_linux.go#L1611: IFLA_INET6_RA_MTU = 0x9
The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)