checkpatch: see if modified files are marked obsolete in MAINTAINERS

Use get_maintainer to check the status of individual files.  If
"obsolete", suggest leaving the files alone.

Link: http://lkml.kernel.org/r/7ceaa510dc9d2df05ec4b456baed7bb1415550b3.1471889575.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: SF Markus Elfring <elfring@users.sourceforge.net>
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 206a6b346a8dbc3d38b1771093671fa37f1daf27..34b4455740115458c127f83bd161459522298514 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -704,6 +704,16 @@ sub seed_camelcase_file {
        }
 }
 
+sub is_maintained_obsolete {
+       my ($filename) = @_;
+
+       return 0 if (!(-e "$root/scripts/get_maintainer.pl"));
+
+       my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback $filename 2>&1`;
+
+       return $status =~ /obsolete/i;
+}
+
 my $camelcase_seeded = 0;
 sub seed_camelcase_includes {
        return if ($camelcase_seeded);
@@ -2289,6 +2299,10 @@ sub process {
                }
 
                if ($found_file) {
+                       if (is_maintained_obsolete($realfile)) {
+                               WARN("OBSOLETE",
+                                    "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy.  No unnecessary modifications please.\n");
+                       }
                        if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
                                $check = 1;
                        } else {