linux-kernel - Re: [PATCH v7 06/18] kbuild: enable building KUnit

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Date:   Wed, 10 Jul 2019 12:59:30 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Brendan Higgins <brendanhiggins@...gle.com>
Cc:     Frank Rowand <frowand.list@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Kees Cook <keescook@...gle.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Rob Herring <robh@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        "Cc: Shuah Khan" <shuah@...nel.org>,
        "Theodore Ts'o" <tytso@....edu>, DTML <devicetree@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        kunit-dev@...glegroups.com,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        linux-um@...ts.infradead.org,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        Tim Bird <Tim.Bird@...y.com>,
        Amir Goldstein <amir73il@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Daniel Vetter <daniel@...ll.ch>, Jeff Dike <jdike@...toit.com>,
        Joel Stanley <joel@....id.au>,
        Julia Lawall <julia.lawall@...6.fr>,
        Kevin Hilman <khilman@...libre.com>,
        Knut Omang <knut.omang@...cle.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Petr Mladek <pmladek@...e.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Richard Weinberger <richard@....at>,
        David Rientjes <rientjes@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>, wfg@...ux.intel.com,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH v7 06/18] kbuild: enable building KUnit

On Tue, Jul 9, 2019 at 3:34 PM Brendan Higgins
<brendanhiggins@...gle.com> wrote:
>
> KUnit is a new unit testing framework for the kernel and when used is
> built into the kernel as a part of it. Add KUnit to the root Kconfig and
> Makefile to allow it to be actually built.
>
> Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Cc: Michal Marek <michal.lkml@...kovi.net>
> Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Reviewed-by: Logan Gunthorpe <logang@...tatee.com>
> ---
>  Kconfig  | 2 ++
>  Makefile | 2 +-
>  2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/Kconfig b/Kconfig
> index 48a80beab6853..10428501edb78 100644
> --- a/Kconfig
> +++ b/Kconfig
> @@ -30,3 +30,5 @@ source "crypto/Kconfig"
>  source "lib/Kconfig"
>
>  source "lib/Kconfig.debug"
> +
> +source "kunit/Kconfig"
> diff --git a/Makefile b/Makefile
> index 3e4868a6498b2..60cf4f0813e0d 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -991,7 +991,7 @@ endif
>  PHONY += prepare0
>
>  ifeq ($(KBUILD_EXTMOD),)
> -core-y         += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
> +core-y         += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ kunit/
>
>  vmlinux-dirs   := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
>                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
> --
> 2.22.0.410.gd8fdbe21b5-goog


This is so trivial, and do not need to get ack from me.

Just a nit.


When CONFIG_KUNIT is disable, is there any point in descending into kunit/ ?

core-$(CONFIG_KUNIT) += kunit/

... might be useful to skip kunit/ entirely.

If you look at the top-level Makefile, some entries are doing this:


init-y          := init/
drivers-y       := drivers/ sound/
drivers-$(CONFIG_SAMPLES) += samples/
drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
net-y           := net/
libs-y          := lib/
core-y          := usr/





--
Best Regards
Masahiro Yamada