linux-kernel - Re: [PATCH 13/13] arm: pgtable: refer to intended CONFIG_ARM

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Date:   Thu, 28 Oct 2021 16:58:45 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     Russell King <linux@...linux.org.uk>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Sekhar Nori <nsekhar@...com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linusw@...nel.org>,
        Imre Kaloz <kaloz@...nwrt.org>,
        Krzysztof Halasa <khalasa@...p.pl>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        kernel-janitors@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 13/13] arm: pgtable: refer to intended CONFIG_ARM_LPAE in comment

On Thu, Oct 28, 2021 at 4:19 PM Lukas Bulwahn <lukas.bulwahn@...il.com> wrote:
>
> Commit 5615f69bc209 ("ARM: 9016/2: Initialize the mapping of KASan shadow
> memory") adds some nested ifdef's in ./arch/arm/mm/pgd.c, and follows the
> good practice to annotate the endif's with a comment to indicate the
> corresponding ifdef condition.
>
> One comment annotation refers to CONFIG_LPAE, whereas the config is
> actually called CONFIG_ARM_LPAE. That imprecision in a comment is probably
> tolerable for all human readers.
>
> However, the script ./scripts/checkkconfigsymbols.py, which checks the
> kernel tree for references to non-existing Kconfig symbols, identifies and
> reports that the reference to CONFIG_LPAE is invalid.
>
> The script ./scripts/checkkconfigsymbols.py has been quite useful to
> identify a number of bugs with Kconfig symbols and deserves to be executed
> and checked regularly.
>
> So, repair the comment to reduce the reports from this script and simplify
> to use this script, as new issues are easier to spot when the list of
> reports is shorter.
>
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>

Reviewed-by: Arnd Bergmann <arnd@...db.de>