linux-kernel - [PATCH 18/39] kbuild/headers

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Date:	Sat,  6 Jun 2009 01:42:36 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Amerigo Wang <amwang@...hat.com>, Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 18/39] kbuild/headers_check: refine extern check

From: Amerigo Wang <amwang@...hat.com>

'extern' checking information is not clear, refine it.
Plus, fix a comment.

Signed-off-by: WANG Cong <amwang@...hat.com>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
---
 scripts/headers_check.pl |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/scripts/headers_check.pl b/scripts/headers_check.pl
index 56f90a4..3923888 100644
--- a/scripts/headers_check.pl
+++ b/scripts/headers_check.pl
@@ -2,7 +2,7 @@
 #
 # headers_check.pl execute a number of trivial consistency checks
 #
-# Usage: headers_check.pl dir [files...]
+# Usage: headers_check.pl dir arch [files...]
 # dir:   dir to look for included files
 # arch:  architecture
 # files: list of files to check
@@ -37,7 +37,7 @@ foreach my $file (@files) {
 		&check_include();
 		&check_asm_types();
 		&check_sizetypes();
-		&check_prototypes();
+		&check_declarations();
 		# Dropped for now. Too much noise &check_config();
 	}
 	close FH;
@@ -61,10 +61,14 @@ sub check_include
 	}
 }
 
-sub check_prototypes
+sub check_declarations
 {
-	if ($line =~ m/^\s*extern\b/) {
-		printf STDERR "$filename:$lineno: extern's make no sense in userspace\n";
+	if ($line =~m/^\s*extern\b/) {
+		if ($line =~ m/^\s*extern\b.*\(.*\)/) {
+			printf STDERR "$filename:$lineno: extern's make no sense in userspace\n";
+		} else {
+			printf STDERR "$filename:$lineno: exporting global variable to userspace is suspicious\n";
+		}
 	}
 }
 
-- 
1.6.3.rc3.40.g75b44

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