linux-kernel - Re: drivers/mux/adg792a.c:134:34: warning: 'adg792a_of

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Date:   Tue, 7 Nov 2023 21:59:27 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Peter Rosin <peda@...ntia.se>
Cc:     Philip Li <philip.li@...el.com>, kernel test robot <lkp@...el.com>,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        oe-kbuild-all@...ts.linux.dev,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mark Brown <broonie@...nel.org>
Subject: Re: drivers/mux/adg792a.c:134:34: warning: 'adg792a_of_match' defined
 but not used

On Mon, Nov 6, 2023 at 11:31 PM Peter Rosin <peda@...ntia.se> wrote:
> 2023-11-05 at 08:35, Philip Li wrote:
> > On Sun, Nov 05, 2023 at 09:09:00AM +0200, Andy Shevchenko wrote:
> >> On Sun, Nov 5, 2023 at 7:03 AM kernel test robot <lkp@...el.com> wrote:
> >>> commit: e9e40543ad5b38b848879768359fd13650529961 spi: Add generic SPI multiplexer

...

> >> I dunno why it's pointing out to that commit and some (random?) people
> >
> > Sorry for the incorrect bad commit, Andy. We will investigate this why
> > it locates to this commit in the bisection process, and try to avoid
> > similar wrong report if possible.
>
> In this case I think the reason is that you have CONFIG_SPI_MUX, which
> seletcs CONFIG_MULTIPLEXER, which in turn makes CONFIG_MUX_ADG792A
> "visible". I.e. before the fingered commit, it is likely that nothing
> selects CONFIG_MULTIPLEXER with the given configuration.

The use of the of_match_ptr() is quite doubtful, no?

-- 
With Best Regards,
Andy Shevchenko