linux-kernel - [PATCH] scripts/checkpatch.pl: added test for repeated lines

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Message-Id: <1310321889-25943-1-git-send-email-edwin@cheatah.nl>
Date:	Sun, 10 Jul 2011 20:18:09 +0200
From:	Edwin van Vliet <edwin@...atah.nl>
To:	apw@...onical.com
Cc:	linux-kernel@...r.kernel.org, Edwin van Vliet <edwin@...atah.nl>
Subject: [PATCH] scripts/checkpatch.pl: added test for repeated lines

Repeated lines may indicate a bug or code that needs clarification. If the
repeated line is intentional, an extra comment may be helpful for reviewers
since the repeated pattern is likely to draw attention.

Signed-off-by: Edwin van Vliet <edwin@...atah.nl>
---
 scripts/checkpatch.pl |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b0aa2c6..4b50496 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1479,6 +1479,11 @@ sub process {
 			WARN("adding a line without newline at end of file\n" . $herecurr);
 		}
 
+# check for repeated lines which may indicate bugs or lack of clarity
+		if ($rawline eq $prevrawline) {
+			WARN("repeated line\n" . $herecurr);
+		}
+
 # Blackfin: use hi/lo macros
 		if ($realfile =~ m@...h/blackfin/.*\.S$@) {
 			if ($line =~ /\.[lL][[:space:]]*=.*&[[:space:]]*0x[fF][fF][fF][fF]/) {
-- 
1.7.5.4

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