linux-kernel - Re: [PATCH 02/30] iio: accel: bma220_spi: Do not define 'struct acpi_device_id' when !CONFIG

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Date:   Sat, 18 Jul 2020 15:26:32 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org,
        Tiberiu Breana <tiberiu.a.breana@...el.com>
Subject: Re: [PATCH 02/30] iio: accel: bma220_spi: Do not define 'struct
 acpi_device_id' when !CONFIG_ACPI

On Thu, 16 Jul 2020 14:59:00 +0100
Lee Jones <lee.jones@...aro.org> wrote:

> Since ACPI_PTR() is used to NULLify the value when !CONFIG_ACPI,
> struct 'bma220_acpi_id' becomes defined but unused.
> 
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/iio/accel/bma220_spi.c:312:36: warning: ‘bma220_acpi_id’ defined but not used [-Wunused-const-variable=]
>  312 | static const struct acpi_device_id bma220_acpi_id[] = {
>  | ^~~~~~~~~~~~~~
> 
> Cc: Tiberiu Breana <tiberiu.a.breana@...el.com>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobulders to play with it.

Thanks,

Jonathan

> ---
>  drivers/iio/accel/bma220_spi.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c
> index cae905039cb62..439618d815594 100644
> --- a/drivers/iio/accel/bma220_spi.c
> +++ b/drivers/iio/accel/bma220_spi.c
> @@ -309,12 +309,14 @@ static const struct spi_device_id bma220_spi_id[] = {
>  	{}
>  };
>  
> +#ifdef CONFIG_ACPI
>  static const struct acpi_device_id bma220_acpi_id[] = {
>  	{"BMA0220", 0},
>  	{}
>  };
>  
>  MODULE_DEVICE_TABLE(spi, bma220_spi_id);
> +#endif
>  
>  static struct spi_driver bma220_driver = {
>  	.driver = {