netdev - Re: [PATCH 2/2] net: asix: Move declaration of ax88172a

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Date:	Fri, 9 Aug 2013 10:40:16 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Fabio Estevam <festevam@...il.com>
Cc:	Mark Brown <broonie@...nel.org>,
	"David S. Miller" <davem@...emloft.net>, linux-usb@...r.kernel.org,
	netdev@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	Mark Brown <broonie@...aro.org>
Subject: Re: [PATCH 2/2] net: asix: Move declaration of ax88172a_info to
 shared header

On Fri, 9 Aug 2013 14:39:06 -0300
Fabio Estevam <festevam@...il.com> wrote:

> On Fri, Aug 9, 2013 at 2:31 PM, Mark Brown <broonie@...nel.org> wrote:
> > From: Mark Brown <broonie@...aro.org>
> >
> > Ensure that the definition of ax88172a_info matches the declaration seen
> > by users and silence sparse warnings about symbols without declarations
> > in the global namespace by moving the declaration into the shared header
> > asix.h.
> >
> > Signed-off-by: Mark Brown <broonie@...aro.org>
> > ---
> >  drivers/net/usb/asix.h         | 2 ++
> >  drivers/net/usb/asix_devices.c | 2 --
> >  2 files changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/usb/asix.h b/drivers/net/usb/asix.h
> > index 346c032..bdaa12d 100644
> > --- a/drivers/net/usb/asix.h
> > +++ b/drivers/net/usb/asix.h
> > @@ -178,6 +178,8 @@ struct asix_common_private {
> >         struct asix_rx_fixup_info rx_fixup_info;
> >  };
> >
> > +extern const struct driver_info ax88172a_info;
> 
> You could drop the 'extern' here.
> 
> All other function prototypes in this header file do not use 'extern'.

That is data, not function prototype, so yes extern is needed.
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