linux-kernel - Re: [PATCH 1080/1285] Replace numeric parameter like 0444 with macro

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Date:	Tue, 2 Aug 2016 09:26:42 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Baole Ni <baolex.ni@...el.com>
Cc:	jbaron@...mai.com, jiangshanlai@...il.com,
	mathieu.desnoyers@...icios.com, m.chehab@...sung.com,
	gregkh@...uxfoundation.org, m.szyprowski@...sung.com,
	kyungmin.park@...sung.com, k.kozlowski@...sung.com,
	linux-kernel@...r.kernel.org, chuansheng.liu@...el.com,
	mhocko@...e.com, tglx@...utronix.de, vkuznets@...hat.com,
	pmladek@...e.com, tj@...nel.org, jpoimboe@...hat.com
Subject: Re: [PATCH 1080/1285] Replace numeric parameter like 0444 with
 macro

On Tue,  2 Aug 2016 20:14:36 +0800
Baole Ni <baolex.ni@...el.com> 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.
> 

NACK!

I find 0444 more readable than S_IRUSR | S_IRGRP | S_IROTH.

-- Steve

> Signed-off-by: Chuansheng Liu <chuansheng.liu@...el.com>
> Signed-off-by: Baole Ni <baolex.ni@...el.com>
> ---
>  lib/dynamic_debug.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
> index fe42b6e..853158e 100644
> --- a/lib/dynamic_debug.c
> +++ b/lib/dynamic_debug.c
> @@ -63,7 +63,7 @@ struct ddebug_iter {
>  static DEFINE_MUTEX(ddebug_lock);
>  static LIST_HEAD(ddebug_tables);
>  static int verbose;
> -module_param(verbose, int, 0644);
> +module_param(verbose, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
>  
>  /* Return the path relative to source root */
>  static inline const char *trim_prefix(const char *path)