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

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Date:	Thu, 17 May 2012 13:54:08 -0700
From:	Joe Perches <joe@...ches.com>
To:	Phil Carmody <ext-phil.2.carmody@...ia.com>
Cc:	linux-kernel@...r.kernel.org, apw@...onical.com
Subject: Re: [PATCH 1/1] checkpatch: don't fake typedefs with #define

On Thu, 2012-05-17 at 15:52 +0300, Phil Carmody wrote:
> People seemed to be taking the "no typedefs" rule too literally,
> and were using #define to abide by the letter rather than the
> spirit of the law. E.g. #define FOO_t struct _FOO_t
> 
> Signed-off-by: Phil Carmody <ext-phil.2.carmody@...ia.com>
> ---
>  scripts/checkpatch.pl |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index faea0ec..7dc41c5 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -2299,6 +2299,12 @@ sub process {
>  			     "do not add new typedefs\n" . $herecurr);
>  		}
>  
> +# check for deliberate avoidance of the above anti-typedef rule
> +		if ($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?


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