[PATCH] checkpatch.pl: Relax commit ID check to allow more than 12 chars

[Jonathan Neuschäfer]

By now, `git log --pretty=%h` (on my copy of linux.git) prints commit
hashes with 13 digits, because of the number of objects.

Relax the rule in checkpatch.pl to allow a few more digits (up to 16).

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 78cc595b98ce1..3a2c8b5426191 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3177,7 +3177,7 @@ sub process {
 				$tag_case = 0 if $tag eq "Fixes:";
 				$tag_space = 0 if ($line =~ /^fixes:? [0-9a-f]{5,} ($balanced_parens)/i);

-				$id_length = 0 if ($orig_commit =~ /^[0-9a-f]{12}$/i);
+				$id_length = 0 if ($orig_commit =~ /^[0-9a-f]{12,16}$/i);
 				$id_case = 0 if ($orig_commit !~ /[A-F]/);

 				# Always strip leading/trailing parens then double quotes if existing
@@ -3194,7 +3194,7 @@ sub process {
 			if ($ctitle ne $title || $tag_case || $tag_space ||
 			    $id_length || $id_case || !$title_has_quotes) {
 				if (WARN("BAD_FIXES_TAG",
-				     "Please use correct Fixes: style 'Fixes: <12 chars of sha1> (\"<title line>\")' - ie: 'Fixes: $cid (\"$ctitle\")'\n" . $herecurr) &&
+				     "Please use correct Fixes: style 'Fixes: <12-16 chars of sha1> (\"<title line>\")' - ie: 'Fixes: $cid (\"$ctitle\")'\n" . $herecurr) &&
 				    $fix) {
 					$fixed[$fixlinenr] = "Fixes: $cid (\"$ctitle\")";
 				}
--
2.39.0