On Wed, Apr 1, 2026 at 12:45 AM David Woodhouse <[email protected]> wrote:
>
> From: David Woodhouse <[email protected]>
>
> Wrap the IPv4-specific registrations in inet_init() with
> CONFIG_LEGACY_IP guards. When LEGACY_IP is disabled, the kernel
> will not:
>  - Register the AF_INET socket family
>  - Register the ETH_P_IP packet handler (ip_rcv)
>  - Initialize ARP, ICMP, IGMP, or IPv4 routing
>  - Register IPv4 protocol handlers (TCP/UDP/ICMP over IPv4)
>  - Initialize IPv4 multicast routing, proc entries, or fragmentation
>
> The shared INET infrastructure (tcp_prot, udp_prot, tcp_init, etc.)
> remains initialized for use by IPv6.
>

...

>
>         /* Add UDP-Lite (RFC 3828) */
> -       udplite4_register();
> +       if (IS_ENABLED(CONFIG_LEGACY_IP))
> +               udplite4_register();

udplite has been removed in net-next.

I would think your patch series is net-next material ?

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