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scripts/kernel-doc: check that non-void fcts describe their return value 

If a function has a return value, but its kernel-doc comment doesn't contain a
"Return" section, then emit the following warning:

   Warning(file.h:129): No description found for return value of 'fct'

Note: 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.

Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Yacine Belkadi 2012-11-27 21:27:19 +01:00 committed by Michal Marek
parent ddf5eabd20
commit 9a52aeeb92
1 changed files with 34 additions and 0 deletions
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scripts/kernel-doc
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@ -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,