linux-kernel - [PATCH] checkpatch: Add test for SPDX-License-Identifier on wrong line #

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Message-ID: <9b74ee87f8c1b8fd310e213fcb4994d58610fcb6.camel@perches.com>
Date:   Fri, 08 Feb 2019 12:44:37 -0800
From:   Joe Perches <joe@...ches.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
Subject: [PATCH] checkpatch: Add test for SPDX-License-Identifier on wrong
 line #

Warn when any SPDX-License-Identifier: tag is not created
on the proper line number.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 216480ae29d1..d0001fd1112d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3075,6 +3075,14 @@ sub process {
 # check we are in a valid source file if not then ignore this hunk
 		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
 
+# check for using SPDX-License-Identifier on the wrong line number
+		if ($realline != $checklicenseline &&
+		    $rawline =~ /\bSPDX-License-Identifier:/ &&
+		    substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) {
+			WARN("SPDX_LICENSE_TAG",
+			     "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr);
+		}
+
 # line length limit (with some exclusions)
 #
 # There are a few types of lines that may extend beyond $max_line_length: