linux-kernel - Re: [PATCH 01/13] sysctl: add new register_sysctl

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Date:   Fri, 29 May 2020 07:40:27 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     keescook@...omium.org, yzaikin@...gle.com, nixiaoming@...wei.com,
        axboe@...nel.dk, clemens@...isch.de, arnd@...db.de,
        gregkh@...uxfoundation.org, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        airlied@...ux.ie, daniel@...ll.ch, benh@...nel.crashing.org,
        rdna@...com, viro@...iv.linux.org.uk, mark@...heh.com,
        jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, vbabka@...e.cz,
        sfr@...b.auug.org.au, jack@...e.cz, amir73il@...il.com,
        rafael@...nel.org, tytso@....edu, julia.lawall@...6.fr,
        akpm@...ux-foundation.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linuxppc-dev@...ts.ozlabs.org,
        ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] sysctl: add new register_sysctl_subdir() helper

Luis Chamberlain <mcgrof@...nel.org> writes:

> Often enough all we need to do is create a subdirectory so that
> we can stuff sysctls underneath it. However, *if* that directory
> was already created early on the boot sequence we really have no
> need to use the full boiler plate code for it, we can just use
> local variables to help us guide sysctl to place the new leaf files.
>
> So use a helper to do precisely this.

Reset restart.  This is patch is total nonsense.

- You are using register_sysctl_table which as I believe I have
  mentioned is a deprecated compatibility wrapper.  The point of
  spring house cleaning is to get off of the deprecated functions
  isn't it?

- You are using the old nasty form for creating directories instead
  of just passing in a path.

- None of this is even remotely necessary.  The directories
  are created automatically if you just register their entries.

Eric