linux-kernel - [PATCH] checkpatch: Add warning about submitting patches using --file

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Date:	Mon, 02 Sep 2013 12:40:47 -0700
From:	Joe Perches <joe@...ches.com>
To:	Josh Triplett <josh@...htriplett.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Andy Whitcroft <apw@...onical.com>,
	David Howells <dhowells@...hat.com>,
	ksummit-2013-discuss@...ts.linuxfoundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH] checkpatch: Add warning about submitting patches using
 --file

Add a message describing the lack of value in using
--file to generate patches.

Exclude files in staging from this message.

A similar message was removed by commit cf655043d4b
("update checkpatch.pl to version 0.15")

Signed-off-by: Joe Perches <joe@...ches.com>
---

Maybe this sort of wordsmithing is valuable.

 scripts/checkpatch.pl | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 9bb056c..f788a14 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4280,6 +4280,19 @@ $vname has style problems, please review.
 If any of these errors are false positives, please report
 them to the maintainer, see CHECKPATCH in MAINTAINERS.
 EOM
+		if ($file && $realfile !~ m@\bstaging/@) {
+			print << "EOM";
+
+WARNING: When using --file mode, do not send patches that just make
+whitespace or formatting changes unless more significant changes are
+also made for other reasons in another patch.
+
+Patches that are just code style changes have a real cost.
+
+These sort of patches can cause rejects with other changes and are
+thought of by many maintainers as more harmful and tiresome than useful.
+EOM
+		}
 	}
 
 	return $clean;


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