linux-kernel - Re: [PATCH 1/3] acpi: nfit: add declaration in a local header

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Date:   Mon, 5 Jun 2023 19:07:44 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Dave Jiang <dave.jiang@...el.com>, Arnd Bergmann <arnd@...nel.org>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Len Brown <lenb@...nel.org>,
        nvdimm@...ts.linux.dev, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] acpi: nfit: add declaration in a local header

On Mon, May 22, 2023 at 5:22 PM Dave Jiang <dave.jiang@...el.com> wrote:
>
>
>
> On 5/16/23 1:14 PM, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@...db.de>
> >
> > The nfit_intel_shutdown_status() function has a __weak defintion
> > in nfit.c and an override in acpi_nfit_test.c for testing
> > purposes. This works without an extern declaration, but causes
> > a W=1 build warning:
> >
> > drivers/acpi/nfit/core.c:1717:13: error: no previous prototype for 'nfit_intel_shutdown_status' [-Werror=missing-prototypes]
> >
> > Add a declaration in a header that gets included from both
> > sides to shut up the warning and ensure that the prototypes
> > actually match.
> >
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
>
> Reviewed-by: Dave Jiang <dave.jiang@...el.com>

Applied as 6.5 material, thanks!

> > ---
> >   drivers/acpi/nfit/nfit.h | 2 ++
> >   1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
> > index 6023ad61831a..573bc0de2990 100644
> > --- a/drivers/acpi/nfit/nfit.h
> > +++ b/drivers/acpi/nfit/nfit.h
> > @@ -347,4 +347,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
> >   void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
> >   bool intel_fwa_supported(struct nvdimm_bus *nvdimm_bus);
> >   extern struct device_attribute dev_attr_firmware_activate_noidle;
> > +void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem);
> > +
> >   #endif /* __NFIT_H__ */