linux-kernel - Re: [PATCH 09/14] ax.25: Update to register_net_sysctl

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Message-ID: <ZMKSWewULuEH6Naa@bombadil.infradead.org>
Date:   Thu, 27 Jul 2023 08:50:49 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Joel Granados <j.granados@...sung.com>
Cc:     Joerg Reuter <jreuter@...na.de>,
        Ralf Baechle <ralf@...ux-mips.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, willy@...radead.org,
        keescook@...omium.org, josh@...htriplett.org,
        linux-hams@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/14] ax.25: Update to register_net_sysctl_sz

On Thu, Jul 27, 2023 at 05:38:04PM +0200, Joel Granados wrote:
> On Wed, Jul 26, 2023 at 11:00:37AM -0700, Luis Chamberlain wrote:
> > On Wed, Jul 26, 2023 at 04:06:29PM +0200, Joel Granados wrote:
> > > This is part of the effort to remove the sentinel (last empty) element
> > > from the ctl_table arrays. We update to the new function and pass it the
> > > array size.
> > 
> > The commit log does not explain why. It also does not explain if there
> > is any delta on size at compile or runtime.
> Just to be on the same page:
> You mean the specific why for this commit. like for example:
> "
> We update  to register_net_sysctl_sz

I think it is clearer to just say:

Move from register_net_sysctl() to register_net_sysctl_sz()

> to prepare for when the ctl_table
> array sentinels are removed.

That is not as clear. I think you should just spell it out.

We want to use the syctl ARRAY_SIZE() when possible, and subsequent
patches ... now the register_net_sysctl() <does something> while
register_net_sysctl_sz() <does something else> and <in this case>
this user <does something> and so we must use register_net_sysctl_sz().

> "
> 
> right?

  Luis