linux-kernel - Re: [PATCH 1/1] checkpatch: don't fake typedefs with #define

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Message-ID: <20120517211641.GC27953@pcarmody2.research.nokia.com>
Date:	Fri, 18 May 2012 00:16:41 +0300
From:	Phil Carmody <ext-phil.2.carmody@...ia.com>
To:	ext Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org, apw@...onical.com
Subject: Re: [PATCH 1/1] checkpatch: don't fake typedefs with #define

On 17/05/12 13:54 -0700, ext Joe Perches wrote:
> > +# check for deliberate avoidance of the above anti-typedef rule
> > +		if ($line =~ /#\s*define\s+$Ident\s+$Type\b/) {
> > +			WARN("NEW_TYPEDEFS",
> > +			     "do not fake typedefs using #define\n" . $herecurr);
> > +		}
> > +
> 
> I think the false positive rate is pretty high.
> I used this and don't see too many I'd remove.
> 
> $ git grep -E "#\s*define\s+\w+\s+(struct|unsigned|char|short|int|long|const)\b"
> 
> Got an example you want this to find?

Too many. Alas I can't share them. However, your input is most welcome, and that
grep shows that my regexp is *way* too broad. So auto-NACK-ing, and I'll now work
on something that doesn't include most of the above hits. Suggestions for a regexp
banning the fake typedefs that would get flagged were they to be mapped onto a 
typedef would be most welcome. The context I'm seeing them is a clear checkpatch
avoidance mess, and I'd like to see it similarly flagged.

Cheers,
Phil
-- 
Phil Carmody
Tel: +372 5697 1161 
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