linux-kernel - Re: [PATCH 2/2 v2] char: misc: use octal permissions for the proc entry

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Date:   Tue, 18 Apr 2017 10:15:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 2/2 v2] char: misc: use octal permissions for the proc
 entry

On Tue, Apr 18, 2017 at 09:51:31AM +0200, Martin Kaiser wrote:
> Thus wrote Greg Kroah-Hartman (gregkh@...uxfoundation.org):
> 
> > > -	ret = proc_create("misc", 0, NULL, &misc_proc_fops);
> > > +	ret = proc_create("misc", 0444, NULL, &misc_proc_fops);
> 
> > What checkpatch warning does this fix?  0 is a number :)
> 
> ERROR: Use 4 digit octal (0777) not decimal permissions
> #285: FILE: drivers/char/misc.c:285:
> +  ret = proc_create("misc", 0, NULL, &misc_proc_fops);

Come on now, think about what this is saying.  Is 0 not also an octal
number?

checkpatch requires you to use your brain, it is but a dumb perl
script...

greg k-h