From b13cf70993e033a3e9e9bb5008d24d3f1ca7acf4 Mon Sep 17 00:00:00 2001
From: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Date: Tue, 27 Nov 2012 21:27:19 +0100
Subject: [PATCH] --- yaml --- r: 347742 b: refs/heads/master c:
 9a52aeeb92853167a67225602b9783f3cf4e578e h: refs/heads/master v: v3

---
 [refs]                   |  2 +-
 trunk/scripts/kernel-doc | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 2dcbe20748ce..4eb6a1cc845e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ddf5eabd20c6cc2814fa2c00a1a033776fbc3e44
+refs/heads/master: 9a52aeeb92853167a67225602b9783f3cf4e578e
diff --git a/trunk/scripts/kernel-doc b/trunk/scripts/kernel-doc
index 46e7aff80d1a..28b761567815 100755
--- a/trunk/scripts/kernel-doc
+++ b/trunk/scripts/kernel-doc
@@ -137,6 +137,8 @@ use strict;
 # should document the "Context:" of the function, e.g. whether the functions
 # can be called form interrupts. Unlike other sections you can end it with an
 # empty line.
+# A non-void function should have a "Return:" section describing the return
+# value(s).
 # Example-sections should contain the string EXAMPLE so that they are marked
 # appropriately in DocBook.
 #
@@ -315,6 +317,7 @@ my $section_default = "Description";	# default section
 my $section_intro = "Introduction";
 my $section = $section_default;
 my $section_context = "Context";
+my $section_return = "Return";
 
 my $undescribed = "-- undescribed --";
 
@@ -2038,6 +2041,28 @@ sub check_sections($$$$$$) {
 	}
 }
 
+##
+# Checks the section describing the return value of a function.
+sub check_return_section {
+        my $file = shift;
+        my $declaration_name = shift;
+        my $return_type = shift;
+
+        # Ignore an empty return type (It's a macro)
+        # Ignore functions with a "void" return type. (But don't ignore "void *")
+        if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
+                return;
+        }
+
+        if (!defined($sections{$section_return}) ||
+            $sections{$section_return} eq "") {
+                print STDERR "Warning(${file}:$.): " .
+                        "No description found for return value of " .
+                        "'$declaration_name'\n";
+                ++$warnings;
+        }
+}
+
 ##
 # takes a function prototype and the name of the current file being
 # processed and spits out all the details stored in the global
@@ -2109,6 +2134,15 @@ sub dump_function($$) {
 	my $prms = join " ", @parameterlist;
 	check_sections($file, $declaration_name, "function", $sectcheck, $prms, "");
 
+        # This check emits a lot of warnings at the moment, because many
+        # functions don't have a 'Return' doc section. So until the number
+        # of warnings goes sufficiently down, the check is only performed in
+        # verbose mode.
+        # TODO: always perform the check.
+        if ($verbose) {
+                check_return_section($file, $declaration_name, $return_type);
+        }
+
     output_declaration($declaration_name,
 		       'function',
 		       {'function' => $declaration_name,