linux-kernel - [PATCH v2] checkpatch: add fix option for MAINTAINERS

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Date:   Mon, 16 Nov 2020 12:49:30 +0530
From:   Aditya Srivastava <yashsri421@...il.com>
To:     joe@...ches.com
Cc:     yashsri421@...il.com,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org, lukas.bulwahn@...il.com
Subject: [PATCH v2] checkpatch: add fix option for MAINTAINERS_STYLE

Checkpatch expects entries in MAINTAINERS file in a specific order and
warns if the changes made do not follow the specified order.

E.g., running checkpatch on commit 6f736909f0a4 ("MAINTAINERS: Add
patchwork link for PWM entry") reports this warning:

WARNING: Misordered MAINTAINERS entry - list 'Q:' before 'T:'
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm.git
+Q:	https://patchwork.ozlabs.org/project/linux-pwm/list/

Provide a simple fix by swapping the unordered lines

Signed-off-by: Aditya Srivastava <yashsri421@...il.com>
---
Changes in v2:
modified commit message

 scripts/checkpatch.pl | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 2749f32dffe9..c9aaaa443265 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3299,13 +3299,22 @@ sub process {
 					     "Unknown MAINTAINERS entry type: '$cur'\n" . $herecurr);
 				} else {
 					if ($previndex >= 0 && $curindex < $previndex) {
-						WARN("MAINTAINERS_STYLE",
-						     "Misordered MAINTAINERS entry - list '$cur:' before '$prev:'\n" . $hereprev);
+						if (WARN("MAINTAINERS_STYLE",
+							 "Misordered MAINTAINERS entry - list '$cur:' before '$prev:'\n" . $hereprev) &&
+						    $fix) {
+							# swap these lines
+							$fixed[$fixlinenr - 1] = $rawline;
+							$fixed[$fixlinenr] = $prevrawline;
+						}
 					} elsif ((($prev eq 'F' && $cur eq 'F') ||
 						  ($prev eq 'X' && $cur eq 'X')) &&
 						 ($prevval cmp $curval) > 0) {
-						WARN("MAINTAINERS_STYLE",
-						     "Misordered MAINTAINERS entry - list file patterns in alphabetic order\n" . $hereprev);
+						if (WARN("MAINTAINERS_STYLE",
+							 "Misordered MAINTAINERS entry - list file patterns in alphabetic order\n" . $hereprev) &&
+						    $fix) {
+							$fixed[$fixlinenr - 1] = $rawline;
+							$fixed[$fixlinenr] = $prevrawline;
+						}
 					}
 				}
 			}
-- 
2.17.1