[PATCH] checkpatch: Warn on empty commit log bodies

[Mark Brown]

Try to help ensure that e-mailed patches have some commit log text in
the body of the e-mail by warning if we can't find any lines that look
like a header of some kind prior to the Signed-off-by.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxx>
---
 scripts/checkpatch.pl |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 45eb0ae..d162421 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1072,6 +1072,7 @@ sub process {
 
 	our $clean = 1;
 	my $signoff = 0;
+	my $headers = 0;
 	my $is_patch = 0;
 
 	our @report = ();
@@ -1258,6 +1259,11 @@ sub process {
 
 		$cnt_lines++ if ($realcnt != 0);
 
+		# Check for a RFC822 style header
+		if ($line =~ /^([a-z0-9-]+:|From )/i) {
+			$headers++;
+		}
+
 #check the patch for a signoff:
 		if ($line =~ /^\s*signed-off-by:/i) {
 			# This is a signoff, if ugly, so do not double report.
@@ -1270,6 +1276,14 @@ sub process {
 				WARN("space required after Signed-off-by:\n" .
 					$herecurr);
 			}
+
+			# There should be at least 1 line of ordinary
+			# text for the body of the commit log prior to
+			# the signoff.
+			if ($linenr - $headers < 2) {
+				print $headers . $linenr . "\n";
+				WARN("no body for commit log");
+			}
 		}
 
 # Check for wrappage within a valid hunk of the file
-- 
1.5.6.3

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