linux-kernel - [PATCH 2/4] checkpatch: Add a multiple blank lines test

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Message-Id: <c069ba9c948d974761a0f50e63e0c364d66cfa9d.1403541113.git.joe@perches.com>
Date:	Mon, 23 Jun 2014 09:35:53 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jean Delvare <jdelvare@...e.de>,
	Andy Whitcroft <apw@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] checkpatch: Add a multiple blank lines test

Multiple consecutive blank lines waste screen space.
Emit a --strict only message with these blank lines.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 4bb4218..3d6dea6 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1642,6 +1642,8 @@ sub process {
 
 	my $non_utf8_charset = 0;
 
+	my $last_blank_line = 0;
+
 	our @report = ();
 	our $cnt_lines = 0;
 	our $cnt_error = 0;
@@ -2306,6 +2308,15 @@ sub process {
 			    "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev);
 		}
 
+# check for multiple consecutive blank lines
+		if ($prevline =~ /^[\+ ]\s*$/ &&
+		    $line =~ /^\+\s*$/ &&
+		    $last_blank_line != ($linenr - 1)) {
+			CHK("LINE_SPACING",
+			    "Please don't use multiple blank lines\n" . $hereprev);
+			$last_blank_line = $linenr;
+		}
+
 # check for missing blank lines after declarations
 		if ($sline =~ /^\+\s+\S/ &&			#Not at char 1
 			# actual declarations
-- 
1.8.1.2.459.gbcd45b4.dirty

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