linux-kernel - Re: [RFC 1/1 linux-next] checkpatch: don't ask for asm/file.h to linux/file.h unconditionally

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Date:	Mon, 30 Mar 2015 13:49:03 -0700
From:	Joe Perches <joe@...ches.com>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel@...r.kernel.org, Andy Whitcroft <apw@...onical.com>
Subject: Re: [RFC 1/1 linux-next] checkpatch: don't ask for asm/file.h to
 linux/file.h unconditionally

On Mon, 2015-03-30 at 22:36 +0200, Fabian Frederick wrote:
> Currently checkpatch warns when asm/file.h is included and linux/file.h
> exists. That conversion can be made when linux/file.h includes asm/file.h
> which is not always the case.(See signal.h)
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> -#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
> +# warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
> +# itself <asm/foo.h> (uses RAW line)
>  		if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
>  			my $file = "$1.h";
>  			my $checkfile = "include/linux/$file";
> +			my $asminclude = `grep -ci "#include <asm/$file.h>" $checkfile`;

This won't work with #include forms like:
	#include	<asm/foo.h>
or when checkpatch is run from somewhere other
than the top of tree.

why the -i?

>  			if (-f "$root/$checkfile" &&
>  			    $realfile ne $checkfile &&
> -			    $1 !~ /$allowed_asm_includes/)
> +			    $1 !~ /$allowed_asm_includes/ &&
> +			    $asminclude > 0 )
>  			{
>  				if ($realfile =~ m{^arch/}) {
>  					CHK("ARCH_INCLUDE_LINUX",


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