Re: [PATCH v2] Staging: greybus: Cleanup in greybus driver

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On 04/17  :25, Greg KH wrote:
> On Tue, Apr 16, 2019 at 05:13:18PM -0500, Madhumitha Prabakaran wrote:
> > Fix a blank line after structure declarations. Also, convert
> > macros into inline functions in order to maintain Linux kernel
> > coding style based on which the inline function is
> > preferable over the macro.
> > 
> > Blank line fixes are suggested by checkpatch.pl
> > 
> > Signed-off-by: Madhumitha Prabakaran <madhumithabiw@xxxxxxxxx>
> > 
> > Changes in v2:
> > - To maintain consistency in driver greybus, all the instances of macro
> > with container_of are fixed in a single patch.
> > ---
> >  drivers/staging/greybus/bundle.h    |  6 +++++-
> >  drivers/staging/greybus/control.h   |  6 +++++-
> >  drivers/staging/greybus/gbphy.h     | 12 ++++++++++--
> >  drivers/staging/greybus/greybus.h   |  6 +++++-
> >  drivers/staging/greybus/hd.h        |  6 +++++-
> >  drivers/staging/greybus/interface.h |  6 +++++-
> >  drivers/staging/greybus/module.h    |  6 +++++-
> >  drivers/staging/greybus/svc.h       |  6 +++++-
> >  8 files changed, 45 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/staging/greybus/bundle.h b/drivers/staging/greybus/bundle.h
> > index 8734d2055657..84956eedb1c4 100644
> > --- a/drivers/staging/greybus/bundle.h
> > +++ b/drivers/staging/greybus/bundle.h
> > @@ -31,7 +31,11 @@ struct gb_bundle {
> >  
> >  	struct list_head	links;	/* interface->bundles */
> >  };
> > -#define to_gb_bundle(d) container_of(d, struct gb_bundle, dev)
> > +
> > +static inline struct gb_bundle *to_gb_bundle(struct device *d)
> > +{
> > +	return container_of(d, struct gb_bundle, dev);
> > +}
> 
> Why are we changing this to an inline function?  The #define is fine,
> and how we "normally" do this type of container_of conversion.
> 
> I understand the objection of the "no blank line", but this was the
> "original" style that we used to create these #defines from the very
> beginning of the driver model work a decade ago.  Changing that
> muscle-memory is going to be hard for some of us.  Look at
> drivers/base/base.h for other examples of this.

Thanks for explaining it.

> 
> thanks,
> 
> greg k-h
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