On Thu, 2021-01-07 at 12:41 +0100, Boris Brezillon wrote:
> On Thu, 7 Jan 2021 10:13:43 +0100
> Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
>
> > On 08/12/2020 16:55, Adrian Ratiu wrote:
> > > Some configurations built by the ktest bot produce the following
> > > warn, so mark the struct as __maybe_unused to avoid unnecessary
> > > ML spam.
> > >
> > > > > drivers/staging/media/rkvdec/rkvdec.c:967:34: warning: unused variable 'of_rkvdec_match' [-Wunused-const-variable]
> > > static const struct of_device_id of_rkvdec_match[] = {
> > > ^
> > > 1 warning generated.
> >
> > I suspect that this is because there is no 'depends on OF' in the Kconfig.
> >
> > '__maybe_unused' isn't used for this anywhere else, so this does not seem like the
> > right approach.
>
> It's not uncommon to do that, especially when you want the driver to be
> compile-tested (`git grep -C2 __maybe_unused|grep of_device_id` even
> reports 2 drivers in the media tree :P). A `depends on OF` or an
> `#ifdef CONFIG_OF` section surrounding the of_rkvdec_match declaration
> would also do the trick.
>
I'm fine either way, __maybe_unused or depends on OF.
Thanks,
Ezequiel
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