On Thu, 20 May 2021, Ian Abbott wrote:
> On 20/05/2021 13:25, Lee Jones wrote:
> > ... and mark it as __maybe_unused since not all users of the
> > header file reference it.
> >
> > Fixes the following W=1 kernel build warning(s):
> >
> > drivers/staging/comedi/drivers/ni_mio_common.c:163:35: warning: ‘range_ni_E_ao_ext’ defined but not used [-Wunused-const-variable=]
> >
> > Cc: Ian Abbott <abbotti@xxxxxxxxx>
> > Cc: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
> > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> > Cc: "Uwe Kleine-König" <u.kleine-koenig@xxxxxxxxxxxxxx>
> > Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> > Cc: "David A. Schleef" <ds@xxxxxxxxxxx>
> > Cc: Mori Hess <fmhess@xxxxxxxxxxxxxxxxxxxxx>
> > Cc: Truxton Fulton <trux@xxxxxxxxxxx>
> > Cc: linux-staging@xxxxxxxxxxxxxxx
> > Cc: linux-pwm@xxxxxxxxxxxxxxx
> > Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
> > ---
> > drivers/comedi/drivers/ni_mio_common.c | 9 ---------
> > drivers/comedi/drivers/ni_stc.h | 9 ++++++++-
> > 2 files changed, 8 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/comedi/drivers/ni_mio_common.c b/drivers/comedi/drivers/ni_mio_common.c
> > index 4f80a4991f953..37615b4e2c10d 100644
> > --- a/drivers/comedi/drivers/ni_mio_common.c
> > +++ b/drivers/comedi/drivers/ni_mio_common.c
> > @@ -160,15 +160,6 @@ static const struct comedi_lrange range_ni_M_ai_628x = {
> > }
> > };
> > -static const struct comedi_lrange range_ni_E_ao_ext = {
> > - 4, {
> > - BIP_RANGE(10),
> > - UNI_RANGE(10),
> > - RANGE_ext(-1, 1),
> > - RANGE_ext(0, 1)
> > - }
> > -};
> > -
> > static const struct comedi_lrange *const ni_range_lkup[] = {
> > [ai_gain_16] = &range_ni_E_ai,
> > [ai_gain_8] = &range_ni_E_ai_limited,
> > diff --git a/drivers/comedi/drivers/ni_stc.h b/drivers/comedi/drivers/ni_stc.h
> > index fbc0b753a0f59..0822e65f709dd 100644
> > --- a/drivers/comedi/drivers/ni_stc.h
> > +++ b/drivers/comedi/drivers/ni_stc.h
> > @@ -1137,6 +1137,13 @@ struct ni_private {
> > u8 rgout0_usage;
> > };
> > -static const struct comedi_lrange range_ni_E_ao_ext;
> > +static const struct comedi_lrange __maybe_unused range_ni_E_ao_ext = {
> > + 4, {
> > + BIP_RANGE(10),
> > + UNI_RANGE(10),
> > + RANGE_ext(-1, 1),
> > + RANGE_ext(0, 1)
> > + }
> > +};
> > #endif /* _COMEDI_NI_STC_H */
> >
>
> The "ni_stc.h" header is also included by "ni_mio_cs.c" which doesn't need
> `range_ni_E_ao_ext` (admittedly, it was already pulling in a "tentative"
> definition of the variable).
>
> Thinking about it, I think it's probably better to move `range_ni_E_ao_ext`
> from "ni_mio_common.c" into *both* "ni_atmio.c" and "ni_pcimio.c" (I think
> we can live with the small amount of duplication), and to remove the
> tentative definition from "ni_stc.h".
Happy to rework.
Am I taking this or Uwe's suggestion?
--
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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