Re: [PATCH] HID: hiddev: use IS_ENABLED() for USB_HIDDEV

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On Fri, 24 Jun 2016, Arnd Bergmann wrote:

> On Friday, June 24, 2016 10:28:50 AM CEST Jiri Kosina wrote:
> > From: Jiri Kosina <jkosina@xxxxxxx>
> > 
> > Use IS_ENABLED() for checking USB_HIDDEV to make sure compilation works 
> > for all possible config combinations.
> > 
> > Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
> > ---
> >  include/linux/hiddev.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/include/linux/hiddev.h b/include/linux/hiddev.h
> > index a5dd814..b6f48d6 100644
> > --- a/include/linux/hiddev.h
> > +++ b/include/linux/hiddev.h
> > @@ -37,7 +37,7 @@ struct hid_usage;
> >  struct hid_field;
> >  struct hid_report;
> >  
> > -#ifdef CONFIG_USB_HIDDEV
> > +#if IS_ENABLED(CONFIG_USB_HIDDEV)
> >  int hiddev_connect(struct hid_device *hid, unsigned int force);
> >  void hiddev_disconnect(struct hid_device *);
> >  void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
> > 
> > 
> 
> CONFIG_USB_HIDDEV is a 'bool' option, so the two look completely
> equivalent.
> 
> If we wanted to make USB_HIDDEV a loadable module by itself,
> we'd also need to export those functions and change both the Kconfig
> and Makefile files to ensure that you can't have USB_HIDDEV=m
> in combination with USB_HID=y.
> 
> What problem are you trying to fix specifically?

This mail was by my mistake generated from my private git tree; sorry for 
the noise, feel free to ignore it.

-- 
Jiri Kosina
SUSE Labs

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