Re: [PATCH v3 3/3] kselftest: Add new test for detecting unprobed Devicetree devices

[Naresh Kamboju]

Hi Aishwarya,

On Thu, 2 Nov 2023 at 17:41, Aishwarya TCV <aishwarya.tcv@xxxxxxx> wrote:
>
>
>
> On 28/08/2023 22:13, Nícolas F. R. A. Prado wrote:
> > Introduce a new kselftest to detect devices that were declared in the
> > Devicetree, and are expected to be probed by a driver, but weren't.
> >
> > The test uses two lists: a list of compatibles that can match a
> > Devicetree device to a driver, and a list of compatibles that should be
> > ignored. The first is automatically generated by the
> > dt-extract-compatibles script, and is run as part of building this test.
> > The list of compatibles to ignore is a hand-crafted list to capture the
> > few exceptions of compatibles that are expected to match a driver but
> > not be bound to it.
> >
> > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
> > Reviewed-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> >
>
> Hi Nicolas,
>
> Currently when building kselftest against next-master and
> mainline-master the below build error is observed. A bisect (full log
> below) identified this patch as introducing the failure.
>
> Full log from a failure:
>
> https://storage.kernelci.org/mainline/master/v6.6-9152-gdeefd5024f07/arm64/defconfig%2Bkselftest/gcc-10/logs/kselftest.log
>
> make[4]: Entering directory '/tmp/kci/linux/tools/testing/selftests/dt'
> /tmp/kci/linux/tools/testing/selftests/../../../scripts/dtc/dt-extract-compatibles
> -d /tmp/kci/linux/tools/testing/selftests/../../.. >
> /tmp/kci/linux/build/kselftest/dt/compatible_list
> Traceback (most recent call last):
>   File
> "/tmp/kci/linux/tools/testing/selftests/../../../scripts/dtc/dt-extract-compatibles",
> line 107, in <module>
>     compat_ignore_list.extend(parse_compatibles_to_ignore(f))
>   File
> "/tmp/kci/linux/tools/testing/selftests/../../../scripts/dtc/dt-extract-compatibles",
> line 67, in parse_compatibles_to_ignore
>     with open(file, 'r', encoding='utf-8') as f:
> OSError: [Errno 40] Too many levels of symbolic links:

OSError: [Errno 40] Too many levels of symbolic links:
This is not related to selftests/dt tests build.

May be due to, A loop of symlinks that are pointing to self / same files ?

> '/tmp/kci/linux/tools/testing/selftests/../../../build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/build/source/tools/testing/selftests/powerpc/vphn/vphn.c'
> make[4]: *** [Makefile:12:
> /tmp/kci/linux/build/kselftest/dt/compatible_list] Error 1
> make[4]: Leaving directory '/tmp/kci/linux/tools/testing/selftests/dt'

Here is the log showing selftests/dt build pass for arm64 build from
Linux next master branch.

Links to the successful build and kselftest.tar file shared below [1].

Build log:
========
make[4]: Entering directory 'tools/testing/selftests/dt'
tools/testing/selftests/../../../scripts/dtc/dt-extract-compatibles -d
tools/testing/selftests/../../.. >
/home/tuxbuild/.cache/tuxmake/builds/1/build/kselftest/dt/compatible_list
make[4]: Leaving directory 'tools/testing/selftests/dt

Please build by using tuxmake and validate builds are working.

steps to reproduce:
======
#!/bin/sh

# TuxMake is a command line tool and Python library that provides
# portable and repeatable Linux kernel builds across a variety of
# architectures, toolchains, kernel configurations, and make targets.
#
# TuxMake supports the concept of runtimes.
# See https://docs.tuxmake.org/runtimes/, for that to work it requires
# that you install podman or docker on your system.
#
# To install tuxmake to your home directory at ~/.local/bin:
# pip3 install -U --user tuxmake
#
# Or install a deb/rpm depending on the running distribution
# See https://tuxmake.org/install-deb/ or
# https://tuxmake.org/install-rpm/
#
# See https://docs.tuxmake.org/ for complete documentation.
# Original tuxmake command with fragments listed below.
# tuxmake --runtime podman --target-arch arm64 --toolchain gcc-13
--kconfig defconfig --kconfig-add
https://raw.githubusercontent.com/Linaro/meta-lkft/kirkstone/meta/recipes-kernel/linux/files/systemd.config
--kconfig-add CONFIG_BCMGENET=y --kconfig-add
tools/testing/selftests/cgroup/config --kconfig-add
tools/testing/selftests/cpufreq/config --kconfig-add
tools/testing/selftests/efivarfs/config --kconfig-add
tools/testing/selftests/filesystems/binderfs/config --kconfig-add
tools/testing/selftests/filesystems/fat/config --kconfig-add
tools/testing/selftests/firmware/config --kconfig-add
tools/testing/selftests/ftrace/config --kconfig-add
tools/testing/selftests/gpio/config --kconfig-add
tools/testing/selftests/ipc/config --kconfig-add
tools/testing/selftests/memfd/config dtbs dtbs-legacy headers kernel
kselftest modules


tuxmake --runtime podman --target-arch arm64 --toolchain gcc-13
--kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2XYjd2yxHiay3gVALCGpAch4G8o/config
dtbs dtbs-legacy headers kernel kselftest modules


Build links:
 [1] https://storage.tuxsuite.com/public/linaro/lkft/builds/2XYjd2yxHiay3gVALCGpAch4G8o/

- Naresh