linux-kernel - Re: [PATCH] acpi: blacklist: fix clang warning for unused dmi table

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Message-ID: <20190710170953.GA80585@archlinux-threadripper>
Date:   Wed, 10 Jul 2019 10:09:53 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] acpi: blacklist: fix clang warning for unused dmi table

On Wed, Jul 10, 2019 at 03:05:43PM +0200, Arnd Bergmann wrote:
> When CONFIG_DMI is disabled, we only have a tentative declaration,
> which causes a warning from clang:
> 
> drivers/acpi/blacklist.c:20:35: error: tentative array definition assumed to have one element [-Werror]
> static const struct dmi_system_id acpi_rev_dmi_table[] __initconst;
> 
> As the variable is not actually used here, hide it entirely
> in an #ifdef to shut up the warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: Nathan Chancellor <natechancellor@...il.com>