linux-kernel - Re: [PATCH] headers_check.pl: disallow extern's

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Date:	Wed, 31 Dec 2008 17:32:32 -0500
From:	Mike Frysinger <vapier@...too.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] headers_check.pl: disallow extern's

On Wednesday 31 December 2008 11:58:03 Arnd Bergmann wrote:
> On Saturday 27 December 2008, Mike Frysinger wrote:
> > +sub check_prototypes
> > +{
> > +	if ($line =~ m/^\s*extern\b/) {
> > +		printf STDERR "extern's make no sense in userspace\n";
> > +		$ret = 1;
> > +	}
> > +}
>
> Unfortunately, this way you can only detect prototypes with an explicit
> 'extern' in them, not the equivalent form with an implicit extern.
>
> Not sure if we can detect the other form reliably from perl.

yes, i already mentioned both of these issues.  that's why i suggested we 
start adding "extern" to all the headers (or at least the userspace ones).
-mike

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