linux-kernel - Re: [PATCH 1/1] Staging: comedi: comedi

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Date:	Tue, 10 May 2016 17:45:14 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	Shyam Saini <mayhs11saini@...il.com>
Cc:	gregkh@...uxfoundation.org, hsweeten@...ionengravers.com,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] Staging: comedi: comedi_fops.c: Fixed coding style
 issue

On 10/05/16 16:51, Shyam Saini wrote:
> Fixed following checkpatch.pl warnings
> WARNING: Prefer WRITE_ONCE(<FOO>, <BAR>) over ACCESS_ONCE(<FOO>) = <BAR>
>
> WARNING: Prefer READ_ONCE(<FOO>) over ACCESS_ONCE(<FOO>)
>
> Signed-off-by: Shyam Saini <mayhs11saini@...il.com>
> ---
>   drivers/staging/comedi/comedi_fops.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
> index 629080f..4d87596 100644
> --- a/drivers/staging/comedi/comedi_fops.c
> +++ b/drivers/staging/comedi/comedi_fops.c
> @@ -312,8 +312,8 @@ static void comedi_file_reset(struct file *file)
>   	}
>   	cfp->last_attached = dev->attached;
>   	cfp->last_detach_count = dev->detach_count;
> -	ACCESS_ONCE(cfp->read_subdev) = read_s;
> -	ACCESS_ONCE(cfp->write_subdev) = write_s;
> +	WRITE_ONCE(cfp->read_subdev, read_s);
> +	WRITE_ONCE(cfp->write_subdev, write_s);
>   }
>
>   static void comedi_file_check(struct file *file)
> @@ -331,7 +331,7 @@ static struct comedi_subdevice *comedi_file_read_subdevice(struct file *file)
>   	struct comedi_file *cfp = file->private_data;
>
>   	comedi_file_check(file);
> -	return ACCESS_ONCE(cfp->read_subdev);
> +	return READ_ONCE(cfp->read_subdev);
>   }
>
>   static struct comedi_subdevice *comedi_file_write_subdevice(struct file *file)
> @@ -339,7 +339,7 @@ static struct comedi_subdevice *comedi_file_write_subdevice(struct file *file)
>   	struct comedi_file *cfp = file->private_data;
>
>   	comedi_file_check(file);
> -	return ACCESS_ONCE(cfp->write_subdev);
> +	return READ_ONCE(cfp->write_subdev);
>   }
>
>   static int resize_async_buffer(struct comedi_device *dev,
> @@ -1992,7 +1992,7 @@ static int do_setrsubd_ioctl(struct comedi_device *dev, unsigned long arg,
>   	    !(s_old->async->cmd.flags & CMDF_WRITE))
>   		return -EBUSY;
>
> -	ACCESS_ONCE(cfp->read_subdev) = s_new;
> +	WRITE_ONCE(cfp->read_subdev, s_new);
>   	return 0;
>   }
>
> @@ -2034,7 +2034,7 @@ static int do_setwsubd_ioctl(struct comedi_device *dev, unsigned long arg,
>   	    (s_old->async->cmd.flags & CMDF_WRITE))
>   		return -EBUSY;
>
> -	ACCESS_ONCE(cfp->write_subdev) = s_new;
> +	WRITE_ONCE(cfp->write_subdev, s_new);
>   	return 0;
>   }
>
>

Thanks!

Reviewed-by: Ian Abbott <abbotti@....co.uk>

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-