linux-kernel - Re: Re: checkpatch: support deprecated terms checking

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Date:   Sun, 26 Jul 2020 01:35:57 +0200
From:   SeongJae Park <sj38.park@...il.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        SeongJae Park <sjpark@...zon.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, apw@...onical.com,
        colin.king@...onical.com, sj38.park@...il.com, jslaby@...e.cz,
        pavel@....cz, SeongJae Park <sjpark@...zon.de>
Subject: Re: Re: checkpatch: support deprecated terms checking

On Sat, 25 Jul 2020 10:29:23 -0700 Joe Perches <joe@...ches.com> wrote:

> On Sat, 2020-07-25 at 15:02 +0200, Michał Mirosław wrote:
> > Hello,
> > 
> > I see that this patch went into next and is already inciting people to
> > do wrong things [1]. Can you please fix it to require '--subjective'
> > switch or otherwise mark it clearly as suggestion-only?
> > 
> > The coding-style as in Linus' master says about *NEW* uses of the words
> > listed (those introductions I expect to be actually rare) and not about
> > existing use in the code or industry. Making a noise about all uses
> > found surely will generate a lot more irrelevant patches.
> > 
> > [1] https://www.spinics.net/lists/linux-tegra/msg51849.html
> 
> And if not reverted, perhaps do not check existing files
> at all but only check patches and change the message to
> show only suggestions not from a specification.

Agreed for this case.  However, excluding existing file check doesn't fully
avoid this problem.  Also, more terms having different deprecation rules might
be added in future.  How about allowing file check but show reference in the
suggestion message as below?

> ---
[...]


Thanks,
SeongJae Park


================================ >8 ===========================================
>From aeb852296bc40ca1de8a6a11f4d5368b02d2e417 Mon Sep 17 00:00:00 2001
From: SeongJae Park <sjpark@...zon.de>
Date: Sun, 26 Jul 2020 01:14:48 +0200
Subject: [PATCH] scripts/deprecatd_terms: provide references

Deprecation of terms could have special rules.  For example, 'slave' is
ok for existing usages.  Same to 'master', but it's also ok unless it's
used with 'slave'.  This commit provides the references for such rules.

Signed-off-by: SeongJae Park <sjpark@...zon.de>
---
 scripts/checkpatch.pl        | 2 +-
 scripts/deprecated_terms.txt | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e9fde28eb0de..77f5f777b053 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2981,7 +2981,7 @@ sub process {
 				my $msg_level = \&WARN;
 				$msg_level = \&CHK if ($file);
 				if (&{$msg_level}("DEPRECATED_TERM",
-						  "Use of '$deprecated_term' is deprecated, please '$suggested', instead.\n" . $herecurr) &&
+						  "Use of '$deprecated_term' is controversial - if not required by specification, perhaps '$suggested' instead.  See: scripts/deprecated_terms.txt\n" . $herecurr) &&
 				    $fix) {
 					$fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($deprecated_term)($|[^A-Za-z@])/$1$suggested$3/;
 				}
diff --git a/scripts/deprecated_terms.txt b/scripts/deprecated_terms.txt
index 1be27a24187b..d92b9c896fce 100644
--- a/scripts/deprecated_terms.txt
+++ b/scripts/deprecated_terms.txt
@@ -3,8 +3,10 @@
 # The format of each line is:
 # deprecated||suggested
 #
+# If special rules are applied on the terms, please comment those.
+#
+# Refer to "4) Naming" section of Documentation/process/coding-style.rst for
+# below three terms.
 blacklist||(denylist|blocklist)
-# For other alternatives of 'slave', Please refer to
-# Documentation/process/coding-style.rst
 slave||(secondary|target|...)
 whitelist||(allowlist|passlist)
-- 
2.17.1