netdev - Re: [RFC net-next 1/6] tools: ynl: fix render-max for flags definition

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Date:   Thu, 23 Feb 2023 09:09:37 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, ast@...nel.org,
        daniel@...earbox.net, hawk@...nel.org, john.fastabend@...il.com,
        saeedm@...dia.com, tariqt@...dia.com, leon@...nel.org,
        shayagr@...zon.com, akiyano@...zon.com, darinzon@...zon.com,
        sgoutham@...vell.com, lorenzo.bianconi@...hat.com, toke@...hat.com
Subject: Re: [RFC net-next 1/6] tools: ynl: fix render-max for flags
 definition

On Thu, 23 Feb 2023 13:11:33 +0100 Lorenzo Bianconi wrote:
> +                if const['type'] == 'flags':
> +                    max_name = c_upper(name_pfx + 'mask')
> +                    max_val = f' = {(entry.user_value() << 1) - 1},'
> +                    cw.p(max_name + max_val)

Could you use EnumSet::get_mask instead() ?

I think it also needs to be fixed to actually walk the elements 
and combine the user_value()s rather than count them and assume
there are no gaps.