linux-kernel - Re: checkpatch bailing out

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Date:	Sat, 2 Mar 2013 14:26:55 +0100
From:	"Arend van Spriel" <arend@...adcom.com>
To:	"Joe Perches" <joe@...ches.com>
cc:	"Andy Whitcroft" <apw@...onical.com>, linux-kernel@...r.kernel.org
Subject: Re: checkpatch bailing out

On 03/02/13 14:07, Joe Perches wrote:
> On Sat, 2013-03-02 at 13:02 +0100, Arend van Spriel wrote:
>> With my laptop being broken I have to work on a server provided by my
>> employer and I am preparing some patches for submission. So I intended
>> to run checkpatch, but I get the following message after which the
>> script bails out:
>>
>> $ git format-patch -1 --stdout | scripts/checkpatch.pl -
>> Nested quantifiers in regex; marked by<-- HERE in m/(\((?:[^\(\)]++<--
>> HERE |(?-1))*\))/ at scripts/checkpatch.pl line 347.
>>
>> The server runs RHEL5
>>
>> 2.6.18-308.20.1.el5 #1 SMP x86_64 GNU/Linux
>>
>> Perl interpreter:
>>
>> $ /usr/bin/perl -v
>>
>> This is perl, v5.8.8 built for x86_64-linux-thread-multi
>>
>> My repository is based on wireless-testing repo.
>>
>> Did a quick search on LKML, but not finding anything like this. Any help
>> would be appreciated here.
>
> Sorry, I don't have perl 5.8.8, it's pretty old.
>
> Perhaps this explains it:
> http://www.perlmonks.org/?node_id=971814 (question)
> http://www.perlmonks.org/?node_id=971883 (explanation)
>
> Perhaps you could test this patch?

No luck. Fails on the same line although the message is different.

$ git format-patch -1 --stdout | scripts/checkpatch.pl -
Sequence (?-1...) not recognized in regex; marked by <-- HERE in 
m/(\((?:(?>[^\(\)]+)|(?-1 <-- HERE ))*\))/ at scripts/checkpatch.pl line 
347.

> ---
>   scripts/checkpatch.pl | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index b28cc38..fb53845 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -344,7 +344,7 @@ our $Typecast	= qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
>   # requires at least perl version v5.10.0

Anyway, I will try to meet this requirement instead of chasing this. 
Thanks for looking into this.

Regards,
Arend

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