linux-kernel - Re: [PATCH] scripts/checkpatch.pl: Add warnings for static char that could be static const char

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Date:	Fri, 10 Sep 2010 02:30:37 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andy Whitcroft <apw@...onical.com>
Cc:	Mike Frysinger <vapier.adi@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] scripts/checkpatch.pl: Add warnings for static char
 that could be static const char

On Fri, 2010-09-10 at 10:06 +0100, Andy Whitcroft wrote:
> On Thu, Sep 09, 2010 at 03:24:14PM -0400, Mike Frysinger wrote:
> > On Thu, Sep 9, 2010 at 15:21, Joe Perches wrote:
> > > Add warnings for possible missing const uses of
> > >        static char foo[] = "bar"
> > >    that could be
> > >        static const char foo[] = "bar"
> > > and
> > >        static const char *foo[] = {"bar", "baz"}
> > >    that could be
> > >        static const char * const foo[] = {"bar", "baz"}
> > guess you missed my last e-mail about not bothering checking the
> > static or the contents :)
> > > +               if ($line =~ /\bconst\s+char\s*\*\s*(\w+)\s*\[\s*\]/) {
> > -mike
> Could you elucidate on that comment Mike, perhaps copy those comments
> here.

Mike thinks that any time there is a char array declaration
with a default value like
	[static] char foo[] = "bar";
or
	[static] [const] char *foo[] = {"bar", ...};

checkpatch should issue a "use const" warning.

http://lkml.org/lkml/2010/9/9/205

Maybe.  Maybe not.  I don't like unnecessary warnings for
functional code.  I think it depends on how often those
initialized strings are actually modified post declaration.

If it's a _really_ high percentage, then OK, sure.


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