linux-kernel - Re: [PATCH] kbuild: warn about headers using __[us]{8,16,32,64} types w/out linux/types.h

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Message-Id: <200812291527.53317.vapier@gentoo.org>
Date:	Mon, 29 Dec 2008 15:27:51 -0500
From:	Mike Frysinger <vapier@...too.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kbuild: warn about headers using __[us]{8,16,32,64} types w/out linux/types.h

On Monday 29 December 2008 08:24:56 Sam Ravnborg wrote:
> On Mon, Dec 29, 2008 at 07:18:47AM -0500, Mike Frysinger wrote:
> > Signed-off-by: Mike Frysinger <vapier@...too.org>
> > ---
> >  scripts/headers_check.pl |   20 ++++++++++++++++++++
> >  1 files changed, 20 insertions(+), 0 deletions(-)
> >
> > diff --git a/scripts/headers_check.pl b/scripts/headers_check.pl
> > index bdd9fb6..5036319 100644
> > --- a/scripts/headers_check.pl
> > +++ b/scripts/headers_check.pl
> > @@ -37,6 +37,7 @@ foreach my $file (@files) {
> >  		check_include();
> >  		check_prototypes();
> >  		check_config();
> > +		check_sizetypes();
> >  	}
> >  	close FH;
> >  }
> > @@ -72,3 +73,22 @@ sub check_config
> >  		printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where
> > it is not valid\n"; }
> >  }
> > +
> > +my $linux_types;
> > +sub check_sizetypes
> > +{
> > +	if ($lineno == 1) {
> > +		$linux_types = 0;
> > +	} elsif ($linux_types) {
> > +		return;
> > +	}
> > +	if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
> > +		$linux_types = 1;
> > +		return;
> > +	}
> > +	if ($line =~ m/__[us](8|16|32|64)\b/) {
> > +		printf STDERR "$filename:$lineno: found __[us]{8,16,32,64} type w/out
> > #include <linux/types.h>\n"; +		# Warn until headers are all fixed
> > +		#$ret = 1;
> > +	}
> > +}
>
> We do not need to warn for each line in a file. Only once is enough.

i wasnt sure about that ... got pretty noisy the way i posted it :)

> Also I assume that include <asm/types.h> is also ok.

i dont think so ... does it really make sense for headers to be hitting 
asm/types.h anyways ?  shouldnt they all be going through linux/types.h ?  
checkpatch would certainly warn about it ...
-mike

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