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In-Reply-To: <20211028141938.3530-14-lukas.bulwahn@gmail.com>
From:   Arnd Bergmann <arnd@arndb.de>
Date:   Thu, 28 Oct 2021 16:58:45 +0200
Message-ID: <CAK8P3a33cMrabWU7i=cT7qVJui2--VkNr2rx2BmKX5qSyfpGpg@mail.gmail.com>
Subject: Re: [PATCH 13/13] arm: pgtable: refer to intended CONFIG_ARM_LPAE in comment
To:     Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc:     Russell King <linux@armlinux.org.uk>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>,
        Sekhar Nori <nsekhar@ti.com>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Linus Walleij <linusw@kernel.org>,
        Imre Kaloz <kaloz@openwrt.org>,
        Krzysztof Halasa <khalasa@piap.pl>,
        Avi Fishman <avifishman70@gmail.com>,
        Tomer Maimon <tmaimon77@gmail.com>,
        Tali Perry <tali.perry1@gmail.com>,
        Patrick Venture <venture@google.com>,
        Nancy Yuen <yuenn@google.com>,
        Benjamin Fair <benjaminfair@google.com>,
        Dinh Nguyen <dinguyen@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        OpenBMC Maillist <openbmc@lists.ozlabs.org>,
        kernel-janitors@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Precedence: bulk

On Thu, Oct 28, 2021 at 4:19 PM Lukas Bulwahn <lukas.bulwahn@gmail.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@gmail.com>

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