linux-kernel - Re: [PATCH 12/30] iio: gyro: adis16080: Fix formatting issue and compiler attribute ordering

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Date:   Thu, 17 Sep 2020 19:33:02 +0100
From:   Jonathan Cameron <jic23@...23.retrosnub.co.uk>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Barry Song <21cnbao@...il.com>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH 12/30] iio: gyro: adis16080: Fix formatting issue and
 compiler attribute ordering

On Sat, 18 Jul 2020 15:54:42 +0100
Jonathan Cameron <jic23@...nel.org> wrote:

> On Thu, 16 Jul 2020 14:59:10 +0100
> Lee Jones <lee.jones@...aro.org> wrote:
> 
> > Kerneldoc expects attributes/parameters to be in '@*.: ' format and
> > gets confused if the variable does not follow the type/attribute
> > definitions.
> > 
> > Fixes the following W=1 kernel build warning(s):
> > 
> >  drivers/iio/gyro/adis16080.c:49: warning: Function parameter or member 'lock' not described in 'adis16080_state'
> >  drivers/iio/gyro/adis16080.c:49: warning: Function parameter or member '____cacheline_aligned' not described in 'adis16080_state'
> > 
> > Cc: Michael Hennerich <Michael.Hennerich@...log.com>
> > Cc: Barry Song <21cnbao@...il.com>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>  
> Hmm. You are going to have an awful lot of those ____cacheline_aligned ones.
> 
> Might be worth thinking about whether we fix kernel-doc to cope with those.
> 
> A quick grep suggests the vast majority of users of this have it after
> the element name.
> 
> @Jon Corbet :  What do you think?  Looks like there is special
> handling already for ____cacheline_aligned_in_smp. Should we extend
> that to this case?

Applied with the ____cacheline_aligned bit dropped as Jon took the patch
to stop kernel-doc complaining about this.

thanks,

Jonathan

> 
> Jonathan
> 
> 
> 
> > ---
> >  drivers/iio/gyro/adis16080.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c
> > index 1b84b8e112fe1..f38f9abcccbb5 100644
> > --- a/drivers/iio/gyro/adis16080.c
> > +++ b/drivers/iio/gyro/adis16080.c
> > @@ -38,14 +38,14 @@ struct adis16080_chip_info {
> >   * @us:			actual spi_device to write data
> >   * @info:		chip specific parameters
> >   * @buf:		transmit or receive buffer
> > - * @lock		lock to protect buffer during reads
> > + * @lock:		lock to protect buffer during reads
> >   **/
> >  struct adis16080_state {
> >  	struct spi_device		*us;
> >  	const struct adis16080_chip_info *info;
> >  	struct mutex			lock;
> >  
> > -	__be16 buf ____cacheline_aligned;
> > +	__be16 ____cacheline_aligned buf;
> >  };
> >  
> >  static int adis16080_read_sample(struct iio_dev *indio_dev,  
>