linux-kernel - [PATCH 34/39] scripts/headers_check.pl: correct RE in header CONFIG leak check

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Date:	Sat,  6 Jun 2009 01:42:52 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	"Robert P. J. Day" <rpjday@...shcourse.ca>,
	David Woodhouse <dwmw2@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 34/39] scripts/headers_check.pl: correct RE in header CONFIG leak check

From: Robert P. J. Day <rpjday@...shcourse.ca>

Correct the regular expression in scripts/headers_check.pl to include '_'
as a valid character in the class; otherwise, the check will report a
"leaked" symbol of CONFIG_A_B_C as merely CONFIG_A.

This patch will make no difference whatsoever in the current kernel tree
as the call to the perl routine that does that check is currently
commented out:

                &check_include();
                &check_asm_types();
                &check_sizetypes();
                &check_prototypes();
                # Dropped for now. Too much noise &check_config();

However, I noticed that problem when I was building the yum downloadable
kernel source rpm for fedora 11 (beta), which *does* run that check, and
that's where the problem became obvious.

Signed-off-by: Robert P. J. Day <rpjday@...shcourse.ca>
Cc: David Woodhouse <dwmw2@...radead.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
---
 scripts/headers_check.pl |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/scripts/headers_check.pl b/scripts/headers_check.pl
index 3923888..e3fb949 100644
--- a/scripts/headers_check.pl
+++ b/scripts/headers_check.pl
@@ -74,7 +74,7 @@ sub check_declarations
 
 sub check_config
 {
-	if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9]+)[^a-zA-Z0-9]/) {
+	if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
 		printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
 	}
 }
-- 
1.6.3.rc3.40.g75b44

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