linux-kernel - Re: tags: include headers before source files

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Date:	Mon, 8 Feb 2010 00:13:11 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
Cc:	linux-kernel@...r.kernel.org, Michal Marek <mmarek@...e.cz>,
	linux-kbuild@...r.kernel.org
Subject: Re: tags: include headers before source files

On Wed, Feb 03, 2010 at 05:25:27PM +0100, Guennadi Liakhovetski wrote:
>Currently looking up a structure definition in TAGS / tags takes one to 
>one of multiple "static struct X" definitions in arch sources, which makes 
>it for many structs practically impossible to get to the required header. 
>This patch changes the order of sources being tagged to first scan 
>architecture includes, then the top-level include/ directory, and only 
>then the rest. It also takes into account, that many architectures have 
>more than one include directory, i.e., not only arch/$ARCH/include, but 
>also arch/$ARCH/mach-X/include etc.

This is a good idea!

>
>Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@....de>


Besides what Michal mentioned, this patch looks fine for me too.

Reviewed-by: WANG Cong <xiyou.wangcong@...il.com>

Thanks.

>---
>
>I am no expert in Kbuild, so, please, review, comment, suggest 
>improvements, but at least, this does make TAGS usable for me.
>
>diff --git a/scripts/tags.sh b/scripts/tags.sh
>index 1a0c44d..b84ce1c 100755
>--- a/scripts/tags.sh
>+++ b/scripts/tags.sh
>@@ -32,13 +32,18 @@ fi
> # find sources in arch/$ARCH
> find_arch_sources()
> {
>-	find ${tree}arch/$1 $ignore -name "$2" -print;
>+	for i in $archincludedir; do
>+		prune+="-wholename $i -prune -o "
>+	done
>+	find ${tree}arch/$1 $ignore $prune -name "$2" -print;
> }
> 
> # find sources in arch/$1/include
> find_arch_include_sources()
> {
>-	find ${tree}arch/$1/include $ignore -name "$2" -print;
>+	include=$(find ${tree}arch/$1/ -name include -type d);
>+	archincludedir+=$include
>+	find $include $ignore -name "$2" -print;
> }
> 
> # find sources in include/
>@@ -63,14 +68,15 @@ find_sources()
> 
> all_sources()
> {
>-	for arch in $ALLSOURCE_ARCHS
>-	do
>-		find_sources $arch '*.[chS]'
>-	done
>+	find_arch_include_sources $ARCH '*.[chS]'
> 	if [ ! -z "$archinclude" ]; then
> 		find_arch_include_sources $archinclude '*.[chS]'
> 	fi
> 	find_include_sources '*.[chS]'
>+	for arch in $ALLSOURCE_ARCHS
>+	do
>+		find_sources $arch '*.[chS]'
>+	done
> 	find_other_sources '*.[chS]'
> }
> 
>--
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