linux-kernel - Re: [PATCH] iio: am2315: Make am2315_acpi_id depend on CONFIG

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Message-ID: <CAHp75VeLyxbwbDtCca5goCEWn7vbQ9d_Fb01dWj1CP8eBb9jJA@mail.gmail.com>
Date:   Tue, 4 May 2021 18:15:44 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
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>
Subject: Re: [PATCH] iio: am2315: Make am2315_acpi_id depend on CONFIG_ACPI

On Tue, May 4, 2021 at 6:11 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Tue, May 4, 2021 at 5:41 PM Guenter Roeck <linux@...ck-us.net> wrote:
> >
> > With CONFIG_ACPI=n and -Werror, 0-day reports:
> >
> > drivers/iio/humidity/am2315.c:259:36: error:
> >         'am2315_acpi_id' defined but not used
>
> ...
>
> > +#ifdef CONFIG_ACPI
> >  static const struct acpi_device_id am2315_acpi_id[] = {
> >         {"AOS2315", 0},
>
> This is a fake ID according to the specification. Do we have any proof
> that it's being used in the wild?
> If no, I prefer to drop this ID section entirely.
>
> If yes, needs a comment which device is using it (however it may be
> out of the scope of this fix).

Googling shows zarro results.

(Yes, I know about meta-acpi project and I may fix it there, but it
may not be considered as a "being in the wild")

So, please, remove the entire section.

Feel free to add any tag from me (Rb, Ack)

> >         {}
> >  };
> > -
> >  MODULE_DEVICE_TABLE(acpi, am2315_acpi_id);
> > +#endif


-- 
With Best Regards,
Andy Shevchenko