linux-kernel - Re: [PATCH 0867/1285] Replace numeric parameter like 0444 with macro

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Message-ID: <1470156329.16559.57.camel@infradead.org>
Date:	Tue, 02 Aug 2016 09:45:29 -0700
From:	Geoff Levand <geoff@...radead.org>
To:	Baole Ni <baolex.ni@...el.com>, benh@...nel.crashing.org,
	paulus@...ba.org, mpe@...erman.id.au, dwmw2@...radead.org,
	m.chehab@...sung.com, pawel@...iak.com, m.szyprowski@...sung.com,
	kyungmin.park@...sung.com, k.kozlowski@...sung.com
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	chuansheng.liu@...el.com
Subject: Re: [PATCH 0867/1285] Replace numeric parameter like 0444 with macro

On Tue, 2016-08-02 at 19:53 +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>
> ---
>  
>  static int timeout = 5000;	/* in msec ( 5 sec ) */
> -module_param(timeout, int, 0644);
> +module_param(timeout, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

To me, 644 is more 'readable', and as for robustness, the meaning of
644 will never change.

-Geoff