[PATCH] scripts: kernel-doc: Report excess struct member descriptions

[Kees Cook]

While missing descriptions were already be reported, missing struct
members were not. For example, previously this output was empty, but now
produces:

$ ./scripts/kernel-doc -none ./drivers/leds/leds-mlxreg.c
./drivers/leds/leds-mlxreg.c:42: warning: Excess struct member 'led_data' 
description in 'mlxreg_led_data'

Cc: Jonathan Corbet <cor...@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
 scripts/kernel-doc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 08a3e603db19..39e730ee1fef 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1265,6 +1265,18 @@ sub dump_struct($$) {
                $declaration .= "\t" . $clause . "\n";
                $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
        }
+
+       my %_members;
+       $_members{$_}++ for (@parameterlist);
+
+       while (my ($k, $v) = each %parameterdescs) {
+           if (!exists($_members{$k})) {
+               if (show_warnings("struct", $declaration_name)) {
+                    emit_warning("${file}:$.", "Excess struct member '$k' 
description in '$declaration_name'\n");
+               }
+           }
+       }
+
        output_declaration($declaration_name,
                           'struct',
                           {'struct' => $declaration_name,
-- 
2.34.1