Subject: Re: [PATCH 03/11 net-next v4] ipv6: replace IS_BUILTIN(CONFIG_IPV6) with IS_ENABLED(CONFIG_IPV6)

From: Ido Schimmel <[email-masked]>
Date: Mon, 23 Mar 2026 22:11:25 +0200

On Fri, Mar 20, 2026 at 07:55:55PM +0100, Fernando Fernandez Mancera wrote:
> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
> index 08cd86f49bf9..c442ac275f58 100644
> --- a/net/ipv6/route.c
> +++ b/net/ipv6/route.c
> @@ -6826,7 +6826,7 @@ void __init ip6_route_init_special_entries(void)
>    #endif
>  }
>  
> -#if IS_BUILTIN(CONFIG_IPV6)
> +#if IS_ENABLED(CONFIG_IPV6)

Can't this be removed?

>  #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_PROC_FS)
>  DEFINE_BPF_ITER_FUNC(ipv6_route, struct bpf_iter_meta *meta, struct fib6_info *rt)
>  
> @@ -6921,7 +6921,7 @@ int __init ip6_route_init(void)
>  	if (ret)
>  		goto out_register_late_subsys;
>  
> -#if IS_BUILTIN(CONFIG_IPV6)
> +#if IS_ENABLED(CONFIG_IPV6)

Same question.

I will try to go over the rest of the patches tomorrow morning.

>  #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_PROC_FS)
>  	ret = bpf_iter_register();
>  	if (ret)
> @@ -6961,10 +6961,8 @@ int __init ip6_route_init(void)
>  
>  void ip6_route_cleanup(void)
>  {
> -#if IS_BUILTIN(CONFIG_IPV6)
>  #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_PROC_FS)
>  	bpf_iter_unregister();
> -#endif
>  #endif
>  	unregister_netdevice_notifier(&ip6_route_dev_notifier);
>  	unregister_pernet_subsys(&ip6_route_net_late_ops);
> -- 
> 2.53.0
>