kernel-doc: add support for specifying extra files for EXPORT_SYMBOLs
If the kernel-doc comments for functions are not in the same file as the
EXPORT_SYMBOL statements, the -export and -internal output selections do
not work as expected. This is typically the case when the kernel-doc
comments are in header files next to the function declarations and the
EXPORT_SYMBOL statements are next to the function definitions in the
source files.
Let the user specify additional source files in which to look for the
EXPORT_SYMBOLs using the new -export-file FILE option, which may be
given multiple times.
The pathological example for this is include/net/mac80211.h, which has
all the kernel-doc documentation for the exported functions defined in a
plethora of source files net/mac80211/*.c.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 516d95f..9708a87 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -61,10 +61,10 @@
Output selection (mutually exclusive):
-export Only output documentation for symbols that have been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
- in the same FILE.
+ in the same FILE or any -export-file FILE.
-internal Only output documentation for symbols that have NOT been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
- in the same FILE.
+ in the same FILE or any -export-file FILE.
-function NAME Only output documentation for the given function(s)
or DOC: section title(s). All other functions and DOC:
sections are ignored. May be specified multiple times.
@@ -76,6 +76,9 @@
-no-doc-sections Do not output DOC: sections.
-enable-lineno Enable output of #define LINENO lines. Only works with
reStructuredText format.
+ -export-file FILE Specify an additional FILE in which to look for
+ EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
+ -export or -internal. May be specified multiple times.
Other parameters:
-v Verbose output, more warnings and other information.
@@ -336,6 +339,8 @@
my $output_selection = OUTPUT_ALL;
my $show_not_found = 0;
+my @export_file_list;
+
my @build_time;
if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
(my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
@@ -488,6 +493,9 @@
} elsif ($cmd eq "-internal") { # only non-exported symbols
$output_selection = OUTPUT_INTERNAL;
%function_table = ();
+ } elsif ($cmd eq "-export-file") {
+ my $file = shift @ARGV;
+ push(@export_file_list, $file);
} elsif ($cmd eq "-v") {
$verbose = 1;
} elsif (($cmd eq "-h") || ($cmd eq "--help")) {
@@ -2747,6 +2755,25 @@
return $file;
}
+sub process_export_file($) {
+ my ($orig_file) = @_;
+ my $file = map_filename($orig_file);
+
+ if (!open(IN,"<$file")) {
+ print STDERR "Error: Cannot open file $file\n";
+ ++$errors;
+ return;
+ }
+
+ while (<IN>) {
+ if (/$export_symbol/) {
+ $function_table{$2} = 1;
+ }
+ }
+
+ close(IN);
+}
+
sub process_file($) {
my $file;
my $identifier;
@@ -3081,6 +3108,14 @@
close(SOURCE_MAP);
}
+if ($output_selection == OUTPUT_EXPORTED ||
+ $output_selection == OUTPUT_INTERNAL) {
+ foreach (@export_file_list) {
+ chomp;
+ process_export_file($_);
+ }
+}
+
foreach (@ARGV) {
chomp;
process_file($_);