linux-kernel - Re: [PATCH v4 linux-kselftest-test 3/6] kunit: allow kunit tests to be loaded as a module

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Message-Id: <20191119210553.2FEBD222DC@mail.kernel.org>
Date:   Tue, 19 Nov 2019 13:05:52 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Alan Maguire <alan.maguire@...cle.com>, brendanhiggins@...gle.com,
        linux-kselftest@...r.kernel.org, skhan@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, kunit-dev@...glegroups.com,
        keescook@...omium.org, yzaikin@...gle.com,
        akpm@...ux-foundation.org, yamada.masahiro@...ionext.com,
        catalin.marinas@....com, joe.lawrence@...hat.com,
        penguin-kernel@...ove.sakura.ne.jp, schowdary@...dia.com,
        urezki@...il.com, andriy.shevchenko@...ux.intel.com,
        corbet@....net, tytso@....edu, adilger.kernel@...ger.ca,
        mcgrof@...nel.org, changbin.du@...el.com,
        linux-ext4@...r.kernel.org, linux-doc@...r.kernel.org,
        Alan Maguire <alan.maguire@...cle.com>,
        Knut Omang <knut.omang@...cle.com>
Subject: Re: [PATCH v4 linux-kselftest-test 3/6] kunit: allow kunit tests to be loaded as a module

Quoting Alan Maguire (2019-11-15 02:16:09)
> As tests are added to kunit, it will become less feasible to execute
> all built tests together.  By supporting modular tests we provide
> a simple way to do selective execution on a running system; specifying
> 
> CONFIG_KUNIT=y
> CONFIG_KUNIT_EXAMPLE_TEST=m
> 
> ...means we can simply "insmod example-test.ko" to run the tests.
> 
> To achieve this we need to do the following:
> 
> o export the required symbols in kunit
> o string-stream tests utilize non-exported symbols so for now we skip
>   building them when CONFIG_KUNIT_TEST=m.
> o support a new way of declaring test suites.  Because a module cannot
>   do multiple late_initcall()s, we provide a kunit_test_suites() macro
>   to declare multiple suites within the same module at once.
> o some test module names would have been too general ("test-test"
>   and "example-test" for kunit tests, "inode-test" for ext4 tests);
>   rename these as appropriate ("kunit-test", "kunit-example-test"
>   and "ext4-inode-test" respectively).
> 
> Signed-off-by: Alan Maguire <alan.maguire@...cle.com>
> Signed-off-by: Knut Omang <knut.omang@...cle.com>
> ---
>  fs/ext4/Kconfig                |   2 +-
>  fs/ext4/Makefile               |   5 +
>  fs/ext4/inode-test.c           |   4 +-
>  include/kunit/test.h           |  35 +++--
>  kernel/sysctl-test.c           |   4 +-
>  lib/Kconfig.debug              |   4 +-
>  lib/kunit/Kconfig              |   4 +-
>  lib/kunit/Makefile             |  10 +-
>  lib/kunit/assert.c             |   8 +
>  lib/kunit/example-test.c       |  88 -----------
>  lib/kunit/kunit-example-test.c |  90 +++++++++++
>  lib/kunit/kunit-test.c         | 334 +++++++++++++++++++++++++++++++++++++++++
>  lib/kunit/string-stream-test.c |   2 +-
>  lib/kunit/test-test.c          | 333 ----------------------------------------
>  lib/kunit/test.c               |   8 +
>  lib/kunit/try-catch.c          |   2 +
>  lib/list-test.c                |   4 +-

Can you generate your patches with -M or -C? Hopefully that will find
copies and only show us the diff between the two files.

>  17 files changed, 494 insertions(+), 443 deletions(-)
>  delete mode 100644 lib/kunit/example-test.c
>  create mode 100644 lib/kunit/kunit-example-test.c
>  create mode 100644 lib/kunit/kunit-test.c
>  delete mode 100644 lib/kunit/test-test.c