checkpatch: relax check for length of git commit IDs

Checkpatch currently warns if a git commit ID (in the changelog,
usually) is less than 12 characters or more than 16.  The "more than 16"
is excessive.  Change the check so we accept IDs from 12 to 40 chars in
length.

Cc: 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 31a731e06f5022afd7c040d5688840491b228e9d..b385bcbbf2f58e03d21ec155a304cf3baed7cdd8 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2133,7 +2133,7 @@ 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]{12,16} \("/) {
+                   $line !~ /\b[Cc]ommit [0-9a-f]{12,40} \("/) {
                        $line =~ /\b(c)ommit\s+([0-9a-f]{5,})/i;
                        my $init_char = $1;
                        my $orig_commit = lc($2);
@@ -2141,7 +2141,7 @@ sub process {
                        my $desc = 'commit description';
                        ($id, $desc) = git_commit_info($orig_commit, $id, $desc);
                        ERROR("GIT_COMMIT_ID",
-                             "Please use 12 to 16 chars for the git commit ID like: '${init_char}ommit $id (\"$desc\")'\n" . $herecurr);
+                             "Please use 12 or more chars for the git commit ID like: '${init_char}ommit $id (\"$desc\")'\n" . $herecurr);
                }
 
 # Check for added, moved or deleted files