netdev - [PATCH v2] checkpatch: add double empty line check

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Message-ID: <1353151057.14327.18.camel@lb-tlvb-eilong.il.broadcom.com>
Date:	Sat, 17 Nov 2012 13:17:37 +0200
From:	"Eilon Greenstein" <eilong@...adcom.com>
To:	"Andy Whitcroft" <apw@...onical.com>
cc:	"Joe Perches" <joe@...ches.com>,
	"David Rientjes" <rientjes@...gle.com>,
	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>
Subject: [PATCH v2] checkpatch: add double empty line check

Changes from previous attempt:
- Use CHK instead of WARN
- Issue only one warning per empty lines block

Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
 scripts/checkpatch.pl |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 21a9f5d..13d264f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3579,6 +3579,14 @@ sub process {
 			WARN("EXPORTED_WORLD_WRITABLE",
 			     "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
 		}
+
+# check for double empty lines
+		if ($line =~ /^\+\s*$/ &&
+		    ($rawlines[$linenr] =~ /^\s*$/ ||
+		     $prevline =~ /^\+?\s*$/ && $rawlines[$linenr] !~ /^\+\s*$/)) {
+			CHK("DOUBLE_EMPTY_LINE",
+			    "One empty line should be sufficient. Consider removing this one.\n" . $herecurr);
+		}
 	}
 
 	# If we have no input at all, then there is nothing to report on
-- 
1.7.9.5




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