[PATCH] checkpatch: Allow commit descriptions on separate line from commit id

[Joe Perches <joe@perches.com>]

The general form for commit id and description is

'Commit <12+hexdigits> ("commit description/subject line")'

But commit logs often have relatively long commit ids and
the commit description is on a separate line like:

Some explanation as to why commit <12+hexdigits>
("commit description/subject line") is improved.

Allow this form.

Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Joe Lawrence <joe.lawrence@stratus.com
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index d89857d..4d869dd 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2133,7 +2133,10 @@ sub process {
 # Check for improperly formed commit descriptions
 		if ($in_commit_log &&
 		    $line =~ /\bcommit\s+[0-9a-f]{5,}/i &&
-		    $line !~ /\b[Cc]ommit [0-9a-f]{12,40} \("/) {
+		    !($line =~ /\b[Cc]ommit [0-9a-f]{12,40} \("/ ||
+		      ($line =~ /\b[Cc]ommit [0-9a-f]{12,40}\s*$/ &&
+		       defined $rawlines[$linenr] &&
+		       $rawlines[$linenr] =~ /^\s*\("/))) {
 			$line =~ /\b(c)ommit\s+([0-9a-f]{5,})/i;
 			my $init_char = $1;
 			my $orig_commit = lc($2);