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Message-ID: <20230522133409.5c6e839a@kernel.org>
Date:   Mon, 22 May 2023 13:34:09 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
Cc:     davem@...emloft.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Leon Romanovsky <leon@...nel.org>,
        David Ahern <dsahern@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>,
        Christian Brauner <brauner@...nel.org>,
        Kuniyuki Iwashima <kuniyu@...zon.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        Luca Boccassi <bluca@...ian.org>, linux-arch@...r.kernel.org
Subject: Re: [PATCH net-next v6 1/3] scm: add SO_PASSPIDFD and SCM_PIDFD

On Mon, 22 May 2023 15:24:37 +0200 Alexander Mikhalitsyn wrote:
> v6:
> 	- disable feature when CONFIG_UNIX=n/m (pidfd_prepare API is not exported to modules)

IMHO hiding the code under #if IS_BUILTIN(CONFIG_UNRELATED) is
surprising to the user and.. ugly?

Can we move scm_pidfd_recv() into a C source and export that?
That should be less controversial than exporting pidfd_prepare()
directly?

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