Re: [PATCH bpf-next v9 08/10] bpf: Skip anonymous types in type lookup for performance

[Eduard Zingerman <eddyz87@gmail.com>]

On Mon, 2025-12-08 at 14:23 +0800, Donglin Peng wrote:

[...]

> @@ -550,6 +550,11 @@ u32 btf_nr_types(const struct btf *btf)
>  	return total;
>  }
>  
> +u32 btf_sorted_start_id(const struct btf *btf)
> +{
> +	return btf->sorted_start_id ?: (btf->start_id ?: 1);
> +}
> +

I think that changes in this patch are correct.  However, it seems
error prone to remember that sorted_start_id is always set for
vmlinux/module BTF and might not be set for program BTF.
Wdyt about using the above function everywhere instead of directly
reading the field?

>  /*
>   * Assuming that types are sorted by name in ascending order.
>   */

[...]