checkpatch: allow commit descriptions on separate line from commit id

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 emds on the next line like:

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

Allow this form.

Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Joe Lawrence <joe.lawrence@stratus.com>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b385bcb..4d08b39 100755 (executable)
--- 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);