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Date:   Sun,  3 Jan 2021 08:50:15 +0100
From:   Nicolai Fischer <nicolai.fischer@....de>
To:     linux-kernel@...r.kernel.org
Cc:     joe@...ches.com, apw@...onical.com, akpm@...ux-foundation.org,
        nicolai.fischer@....de, johannes.czekay@....de,
        linux-kernel@...cs.fau.de
Subject: [PATCH v3 5/5] checkpatch: kconfig: enforce block indentation

Adds a new warning to checkpatch in case a new Kconfig block
is not indented one sigle tab more than the keyword which
starts it.

Co-developed-by: Johannes Czekay <johannes.czekay@....de>
Signed-off-by: Johannes Czekay <johannes.czekay@....de>
Signed-off-by: Nicolai Fischer <nicolai.fischer@....de>
---
 scripts/checkpatch.pl | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 805b5870803f..8a82ea5c2eb3 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3306,7 +3306,8 @@ sub process {
 		    # 'choice' is usually the last thing on the line (though
 		    # Kconfig supports named choices), so use a word boundary
 		    # (\b) rather than a whitespace character (\s)
-		    $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) {
+		    $line =~ /^\+(\s*)(?:config|menuconfig|choice)\b/) {
+			my $base_indent = $1;
 			my $length = 0;
 			my $cnt = $realcnt;
 			my $ln = $linenr + 1;
@@ -3315,6 +3316,7 @@ sub process {
 			my $is_end = 0;
 			my $help_indent;
 			my $help_stat_real;
+			my $block_stat_real;
 			for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) {
 				$f = $lines[$ln - 1];
 				$cnt-- if ($lines[$ln - 1] !~ /^-/);
@@ -3323,7 +3325,10 @@ sub process {
 				next if ($f =~ /^-/);
 				last if (!$file && $f =~ /^\@\@/);
 
-				if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|int|hex|string|prompt)\s*(?:["'].*)?$/) {
+				if ($lines[$ln - 1] =~ /^\+(\s*)(?:bool|tristate|int|hex|string|prompt)\s*(?:["'].*)?$/) {
+					if ($1 !~ /^$base_indent\t$/) {
+						$block_stat_real = get_stat_real($linenr, $ln);
+					}
 					$is_start = 1;
 				} elsif ($lines[$ln - 1] =~ /^\+(\s*)help$/) {
 					$help_indent = $1;
@@ -3358,6 +3363,10 @@ sub process {
 				WARN("CONFIG_DESCRIPTION",
 				     "please write a paragraph ($length/$min_conf_desc_length lines) that describes the config symbol fully\n" . $herecurr);
 			}
+			if ($is_start && $is_end && defined $block_stat_real) {
+				WARN("CONFIG_DESCRIPTION",
+				     "please indent the block a single tab more than the start\n" . "$here\n$block_stat_real\n");
+			}
 			if ($is_start && $is_end && defined $help_stat_real) {
 				WARN("CONFIG_DESCRIPTION",
 				     "please indent the help text two spaces more than the keyword\n" . "$here\n$help_stat_real\n");
-- 
2.29.2

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