linux-kernel - Re: [PATCH 0239/1285] Replace numeric parameter like 0444 with macro

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Date:	Tue, 2 Aug 2016 14:22:13 +0200
From:	Greg KH <greg@...ah.com>
To:	Baole Ni <baolex.ni@...el.com>
Cc:	jdelvare@...e.com, linux@...ck-us.net, airlied@...ux.ie,
	kgene@...nel.org, k.kozlowski@...sung.com,
	dougthompson@...ssion.com, bp@...en8.de,
	linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
	chuansheng.liu@...el.com, aduggan@...aptics.com,
	dianders@...omium.org
Subject: Re: [PATCH 0239/1285] Replace numeric parameter like 0444 with macro

On Tue, Aug 02, 2016 at 06:52:21PM +0800, Baole Ni wrote:
> I find that the developers often just specified the numeric value
> when calling a macro which is defined with a parameter for access permission.
> As we know, these numeric value for access permission have had the corresponding macro,
> and that using macro can improve the robustness and readability of the code,
> thus, I suggest replacing the numeric parameter with the macro.
> 
> Signed-off-by: Chuansheng Liu <chuansheng.liu@...el.com>
> Signed-off-by: Baole Ni <baolex.ni@...el.com>
> ---
>  drivers/hwmon/fschmd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
> index d58abdc..a7e4885 100644
> --- a/drivers/hwmon/fschmd.c
> +++ b/drivers/hwmon/fschmd.c
> @@ -602,7 +602,7 @@ static ssize_t store_alert_led(struct device *dev,
>  	return count;
>  }
>  
> -static DEVICE_ATTR(alert_led, 0644, show_alert_led, store_alert_led);
> +static DEVICE_ATTR(alert_led, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, show_alert_led, store_alert_led);

Use DEVICE_ATTR_RW() please.