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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Mon, 15 Aug 2022 14:44:42 +0200
Message-ID: <CAK8P3a120ekWQzOLLfDF5jVHJ6XKpz5fKRrh8R-yk6S9PmoeTA@mail.gmail.com>
Subject: Re: [PATCH] clocksource/drivers/timer-ti-dm: Fix compile test warning
To:     Tony Lindgren <tony@atomide.com>
Cc:     Daniel Lezcano <daniel.lezcano@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        kernel test robot <lkp@intel.com>
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On Mon, Aug 15, 2022 at 2:03 PM Tony Lindgren <tony@atomide.com> wrote:
>
> We can get a warning with COMPILE_TEST enabled for omap_timer_match
> for 'omap_timer_match' defined but not used.
>
> Fixes: ab0bbef3ae0f ("clocksource/drivers/timer-ti-dm: Make timer selectable for ARCH_K3")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---
>  drivers/clocksource/timer-ti-dm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
> --- a/drivers/clocksource/timer-ti-dm.c
> +++ b/drivers/clocksource/timer-ti-dm.c
> @@ -1040,7 +1040,7 @@ static const struct dmtimer_platform_data am6_pdata = {
>         .timer_ops = &dmtimer_ops,
>  };
>
> -static const struct of_device_id omap_timer_match[] = {
> +static const __maybe_unused struct of_device_id omap_timer_match[] = {
>         {
>                 .compatible = "ti,omap2420-timer",
>         },

I think a better way to address this is to remove the of_match_ptr()
usage from the driver. The only reason to use of_match_ptr() is to save
a few bytes on machines that don't have CONFIG_OF enabled, but this
driver is not used on such machines any more.

         Arnd