linux-kernel - Re: [PATCH 3/9] eeepc-laptop: use DEVICE_ATTR* to instantiate device

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Date:	Wed, 17 Sep 2014 15:06:50 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Frans Klaver <fransklaver@...il.com>
Cc:	Darren Hart <dvhart@...radead.org>,
	Corentin Chary <corentin.chary@...il.com>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/9] eeepc-laptop: use DEVICE_ATTR* to instantiate
 device_attributes

On Wed, Sep 17, 2014 at 11:47:21PM +0200, Frans Klaver wrote:
> Device attributes are instantiated manually, while we have DEVICE_ATTR*
> macros available to do much of the work for us. Let's use them.
> 
> Signed-off-by: Frans Klaver <fransklaver@...il.com>
> ---
>  drivers/platform/x86/eeepc-laptop.c | 34 ++++------------------------------
>  1 file changed, 4 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index 0094449..db26f78 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c
> @@ -308,13 +308,7 @@ static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
>  	{								\
>  		return store_sys_acpi(dev, _cm, buf, count);		\
>  	}								\
> -	static struct device_attribute dev_attr_##_name = {		\
> -		.attr = {						\
> -			.name = __stringify(_name),			\
> -			.mode = _mode },				\
> -		.show   = _name##_show,					\
> -		.store  = _name##_store,				\
> -	}
> +	static DEVICE_ATTR(_name, _mode, _name##_show, _name##_store)

Can you change this to be DEVICE_ATTR_RO()?

If not, split it up into 2 different macros, one using the _RW and one
_RO version, _never_ have the driver specify the mode of the sysfs file
please.

thanks,

greg k-h
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