linux-kernel - Re: [PATCH v2] iio: bme680

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Message-ID: <20210506133754.GA2266661@roeck-us.net>
Date:   Thu, 6 May 2021 06:37:54 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel test robot <lkp@...el.com>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v2] iio: bme680_i2c: Remove ACPI support

On Thu, May 06, 2021 at 12:28:40PM +0300, Andy Shevchenko wrote:
> On Thu, May 6, 2021 at 6:43 AM Guenter Roeck <linux@...ck-us.net> wrote:
> >
> > With CONFIG_ACPI=n and -Werror, 0-day reports:
> >
> > drivers/iio/chemical/bme680_i2c.c:46:36: error:
> >         'bme680_acpi_match' defined but not used
> >
> > Apparently BME0680 is not a valid ACPI ID. Remove it and with it
> > ACPI support from the bme680_i2c driver.
> 
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> 
> with the SPI part amended in the same way.
> 
Right. I just sent a patch doing that. Oddly enough 0-day didn't complain
about that one to me, nor about many other drivers with the same problem.
No idea how it decides if and when to make noise.

Is there a way to determine invalid ACPI IDs ? I could write a coccinelle
script to remove the code automatically.

Thanks,
Guenter