linux-kernel - Re: [PATCH 0077/1285] Replace numeric parameter like 0444 with macro

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Date:	Tue, 2 Aug 2016 14:42:56 +0200
From:	Pavel Machek <pavel@....cz>
To:	Baole Ni <baolex.ni@...el.com>
Cc:	rjw@...ysocki.net, len.brown@...el.com, gregkh@...uxfoundation.org,
	hpa@...or.com, x86@...nel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, chuansheng.liu@...el.com
Subject: Re: [PATCH 0077/1285] Replace numeric parameter like 0444 with macro

On Tue 2016-08-02 18:38:55, 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>

Sorry, the macros just make it _less_ readable, because you do chmod
666, not chmod S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH.

NAK.
							Pavel
							
> -static DEVICE_ATTR(control, 0644, control_show, control_store);
> +static DEVICE_ATTR(control, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, control_show, control_store);

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