scripts: kernel_doc: better handle show warnings logic

The logic with inhibits warnings for definitions that is not
output is incomplete: it doesn't cover the cases where
OUTPUT_INTERNAL and OUTPUT_EXPORTED are used.

As the most common case is OUTPUT_ALL, place it first,
in order to optimize a litte bit the check logic.

Fixes: 2defb2729217 ("scripts: kernel-doc: apply filtering rules to warnings")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-and-Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

1 files changed, 41 insertions, 15 deletions

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 1e2b35ce1c9d..fee8952037b1 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1140,6 +1140,44 @@ sub dump_struct($$) {
     }
 }
 
+
+sub show_warnings($$) {
+        my $functype = shift;
+        my $name = shift;
+
+        return 1 if ($output_selection == OUTPUT_ALL);
+
+        if ($output_selection == OUTPUT_EXPORTED) {
+                if (defined($function_table{$name})) {
+                        return 1;
+                } else {
+                        return 0;
+                }
+        }
+        if ($output_selection == OUTPUT_INTERNAL) {
+                if (!($functype eq "function" && defined($function_table{$name}))) {
+                        return 1;
+                } else {
+                        return 0;
+                }
+        }
+        if ($output_selection == OUTPUT_INCLUDE) {
+                if (defined($function_table{$name})) {
+                        return 1;
+                } else {
+                        return 0;
+                }
+        }
+        if ($output_selection == OUTPUT_EXCLUDE) {
+                if (!defined($function_table{$name})) {
+                        return 1;
+                } else {
+                        return 0;
+                }
+        }
+        die("Please add the new output type at show_warnings()");
+}
+
 sub dump_enum($$) {
     my $x = shift;
     my $file = shift;
@@ -1160,11 +1198,7 @@ sub dump_enum($$) {
             push @parameterlist, $arg;
             if (!$parameterdescs{$arg}) {
                 $parameterdescs{$arg} = $undescribed;
-                if (($output_selection == OUTPUT_ALL) ||
-                    ($output_selection == OUTPUT_INCLUDE &&
-                     defined($function_table{$declaration_name})) ||
-                    ($output_selection == OUTPUT_EXCLUDE &&
-                     !defined($function_table{$declaration_name}))) {
+                if (show_warnings("enum", $declaration_name)) {
                         print STDERR "${file}:$.: warning: Enum value '$arg' not described in enum '$declaration_name'\n";
                 }
             }
@@ -1173,11 +1207,7 @@ sub dump_enum($$) {
 
         while (my ($k, $v) = each %parameterdescs) {
             if (!exists($_members{$k})) {
-                if (($output_selection == OUTPUT_ALL) ||
-                    ($output_selection == OUTPUT_INCLUDE &&
-                     defined($function_table{$declaration_name})) ||
-                    ($output_selection == OUTPUT_EXCLUDE &&
-                     !defined($function_table{$declaration_name}))) {
+                if (show_warnings("enum", $declaration_name)) {
                      print STDERR "${file}:$.: warning: Excess enum value '$k' description in '$declaration_name'\n";
                 }
             }
@@ -1385,11 +1415,7 @@ sub push_parameter($$$$) {
         if (!defined $parameterdescs{$param} && $param !~ /^#/) {
                 $parameterdescs{$param} = $undescribed;
 
-                if (($output_selection == OUTPUT_ALL) ||
-                    ($output_selection == OUTPUT_INCLUDE &&
-                     defined($function_table{$declaration_name})) ||
-                    ($output_selection == OUTPUT_EXCLUDE &&
-                     !defined($function_table{$declaration_name}))) {
+                if (show_warnings($type, $declaration_name)) {
                         print STDERR
                               "${file}:$.: warning: Function parameter or member '$param' not described in '$declaration_name'\n";
                         ++$warnings;