linux-kernel - Re: [PATCH] staging: fbtft: replace __ATTR() with DEVICE

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Date:   Wed, 13 Dec 2017 12:50:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Aishwarya Pant <aishpant@...il.com>
Cc:     Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        julia.lawall@...6.fr
Subject: Re: [PATCH] staging: fbtft: replace __ATTR() with DEVICE_ATTR()

On Mon, Dec 11, 2017 at 03:24:30PM +0530, Aishwarya Pant wrote:
> This is a clean-up patch which replaces the uses of raw __ATTR(...)
> macro with the more conventional DEVICE_ATTR(...) for defining device
> attributes.
> 
> Done using coccinelle-
> 
> @r@
> identifier foo, n;
> @@
> 
> struct device_attribute foo =  __ATTR(n, ...);
> 
> @script:python p@
> id;
> foo << r.foo;
> n << r.n;
> @@
> 
> // standardise the variable name to dev_attr_{name}
> coccinelle.id = "dev_attr_" + n
> 
> @@
> identifier r.foo;
> declarer name DEVICE_ATTR;
> @@
> 
> //change definition
> - struct device_attribute foo = __ATTR
> + DEVICE_ATTR
> 	(...);
> 
> @depends on r@
> identifier r.foo, p.id;
> @@
> 
> // replace usages everywhere
> - foo
> + id
> 
> Signed-off-by: Aishwarya Pant <aishpant@...il.com>
> ---
>  drivers/staging/fbtft/fbtft-sysfs.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/fbtft/fbtft-sysfs.c b/drivers/staging/fbtft/fbtft-sysfs.c
> index 712096659aa0..506d604d01bb 100644
> --- a/drivers/staging/fbtft/fbtft-sysfs.c
> +++ b/drivers/staging/fbtft/fbtft-sysfs.c
> @@ -197,19 +197,18 @@ static ssize_t show_debug(struct device *device,
>  	return snprintf(buf, PAGE_SIZE, "%lu\n", par->debug);
>  }
>  
> -static struct device_attribute debug_device_attr =
> -	__ATTR(debug, 0660, show_debug, store_debug);
> +static DEVICE_ATTR(debug, 0660, show_debug, store_debug);

This should be DEVICE_ATTR_RW(), right?  0660 makes no sense...

thanks,

greg k-h