linux-kernel - Re: [PATCH] memory: ti-emif-pm: Drop of_match_ptr from of_device

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Date:   Sat, 6 Feb 2021 15:08:32 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Santosh Shilimkar <ssantosh@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] memory: ti-emif-pm: Drop of_match_ptr from of_device_id
 table

On Sat, Feb 06, 2021 at 12:13:43PM +0100, Krzysztof Kozlowski wrote:
> The driver can match only via the DT table so the table should be always
> used and the of_match_ptr does not have any sense (this also allows ACPI
> matching via PRP0001, even though it might be not relevant here).  This
> fixes compile warning (!CONFIG_OF with clang):
> 
>     drivers/memory/ti-emif-pm.c:238:34: warning:
>         unused variable 'ti_emif_of_match' [-Wunused-const-variable]
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

Yes, this seems to be how everyone is dealing with this warning:

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>  drivers/memory/ti-emif-pm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/memory/ti-emif-pm.c b/drivers/memory/ti-emif-pm.c
> index 6c747c1e98cb..179fec2da56d 100644
> --- a/drivers/memory/ti-emif-pm.c
> +++ b/drivers/memory/ti-emif-pm.c
> @@ -340,7 +340,7 @@ static struct platform_driver ti_emif_driver = {
>  	.remove = ti_emif_remove,
>  	.driver = {
>  		.name = KBUILD_MODNAME,
> -		.of_match_table = of_match_ptr(ti_emif_of_match),
> +		.of_match_table = ti_emif_of_match,
>  		.pm = &ti_emif_pm_ops,
>  	},
>  };
> -- 
> 2.25.1
>