[PATCH 25/33] docs: Kconfig/Makefile: add a check for broken ABI files

Mauro Carvalho Chehab
2020-10-29T01:01:52Z

From: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

The files under Documentation/ABI should follow the syntax
as defined at Documentation/ABI/README.

Allow checking if they're following the syntax by running
the ABI parser script on COMPILE_TEST.

With that, when there's a problem with a file under
Documentation/ABI, it would produce a warning like:

Warning: file ./Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats#14:
What '/sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_cor' doesn't have a description
Warning: file ./Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats#21:
What '/sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_fatal' doesn't have a description

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
Documentation/Kconfig | 10 ++++++++++
Documentation/Makefile | 5 +++++
lib/Kconfig.debug | 2 ++
scripts/get_abi.pl | 14 +++++++++++---
4 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/Documentation/Kconfig b/Documentation/Kconfig
index 66046fa1c341..e549a61f4d96 100644
--- a/Documentation/Kconfig
+++ b/Documentation/Kconfig
@@ -10,4 +10,14 @@ config WARN_MISSING_DOCUMENTS

If unsure, select 'N'.

+config WARN_ABI_ERRORS
+ bool "Warn if there are errors at ABI files"
+ depends on COMPILE_TEST
+ help
+ The files under Documentation/ABI should follow what's
+ described at Documentation/ABI/README. Yet, as they're manually
+ written, it would be possible that some of those files would
+ have errors that would break them for being parsed by
+ scripts/get_abi.pl. Add a check to verify them.

+ If unsure, select 'N'.
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 4e47dff8b315..61a7310b49e0 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -10,6 +10,11 @@ ifeq ($(CONFIG_WARN_MISSING_DOCUMENTS),y)
$(shell $(srctree)/scripts/documentation-file-ref-check --warn)
endif

+# Check for broken ABI files
+ifeq ($(CONFIG_WARN_ABI_ERRORS),y)
+$(shell $(srctree)/scripts/get_abi.pl validate --dir $(srctree)/Documentation/ABI)
+endif
+
# You can set these variables from the command line.
SPHINXBUILD = sphinx-build
SPHINXOPTS =
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d7a7bc3b6098..c789b39ed527 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2446,4 +2446,6 @@ config HYPERV_TESTING

endmenu # "Kernel Testing and Coverage"

+source "Documentation/Kconfig"
+
endmenu # Kernel hacking
diff --git a/scripts/get_abi.pl b/scripts/get_abi.pl
index 3cff7cdf1397..413349789145 100755
--- a/scripts/get_abi.pl
+++ b/scripts/get_abi.pl
@@ -50,7 +50,15 @@ my %symbols;
sub parse_error($$$$) {
my ($file, $ln, $msg, $data) = @_;

- print STDERR "file $file#$ln: $msg at\n\t$data";
+ $data =~ s/\s+$/\n/;
+
+ print STDERR "Warning: file $file#$ln:\n\t$msg";
+
+ if ($data ne "") {
+ print STDERR ". Line\n\t\t$data";
+ } else {
+ print STDERR "\n";
+ }
}

#
@@ -110,7 +118,7 @@ sub parse_abi {

# Invalid, but it is a common mistake
if ($new_tag eq "where") {
- parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", $_);
+ parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", "");
$new_tag = "what";
}

@@ -225,7 +233,7 @@ sub parse_abi {
}

# Everything else is error
- parse_error($file, $ln, "Unexpected line:", $_);
+ parse_error($file, $ln, "Unexpected content", $_);
}
$data{$nametag}->{description} =~ s/^\n+// if ($data{$nametag}->{description});
if ($what) {
--
2.26.2