linux-kernel - Re: [PATCH 2/2] iio: proximity: isl29501: mark OF related data as maybe unused

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Date:   Fri, 11 Aug 2023 16:34:04 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andi Shyti <andi.shyti@...nel.org>
Subject: Re: [PATCH 2/2] iio: proximity: isl29501: mark OF related data as
 maybe unused

On Thu, 10 Aug 2023 13:19:33 +0200
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

> When compile tested with W=1 on x86_64 with driver as built-in:
> 
>   isl29501.c:999:34: error: unused variable 'isl29501_i2c_matches' [-Werror,-Wunused-const-variable]
> 
> The if defined(CONFIG_OF) is also not needed in such case.
As in patch 1 I'd rather see it used. Not even an match data to make that more complex
here.

> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  drivers/iio/proximity/isl29501.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/proximity/isl29501.c b/drivers/iio/proximity/isl29501.c
> index bcebacaf3dab..9e34224b5775 100644
> --- a/drivers/iio/proximity/isl29501.c
> +++ b/drivers/iio/proximity/isl29501.c
> @@ -995,13 +995,11 @@ static const struct i2c_device_id isl29501_id[] = {
>  
>  MODULE_DEVICE_TABLE(i2c, isl29501_id);
>  
> -#if defined(CONFIG_OF)
> -static const struct of_device_id isl29501_i2c_matches[] = {
> +static const struct of_device_id isl29501_i2c_matches[] __maybe_unused = {
>  	{ .compatible = "renesas,isl29501" },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, isl29501_i2c_matches);
> -#endif
>  
>  static struct i2c_driver isl29501_driver = {
>  	.driver = {