linux-kernel - Re: [RFC v3 16/19] arch: um: make UML unflatten device tree when testing

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Date:   Mon, 3 Dec 2018 16:00:50 -0800
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...gle.com>, mcgrof@...nel.org,
        shuah@...nel.org, Joel Stanley <joel@....id.au>,
        mpe@...erman.id.au, joe@...ches.com, brakmo@...com,
        rostedt@...dmis.org, Tim.Bird@...y.com, khilman@...libre.com,
        Julia Lawall <julia.lawall@...6.fr>,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        jdike@...toit.com, richard@....at, linux-um@...ts.infradead.org,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, dan.j.williams@...el.com,
        linux-nvdimm@...ts.01.org, kieran.bingham@...asonboard.com,
        Frank Rowand <frowand.list@...il.com>,
        Knut Omang <knut.omang@...cle.com>
Subject: Re: [RFC v3 16/19] arch: um: make UML unflatten device tree when testing

On Wed, Nov 28, 2018 at 1:16 PM Rob Herring <robh@...nel.org> wrote:
>
> On Wed, Nov 28, 2018 at 1:38 PM Brendan Higgins
> <brendanhiggins@...gle.com> wrote:
> > diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
> > index a818ccef30ca2..bd58ae3bf4148 100644
> > --- a/arch/um/kernel/um_arch.c
> > +++ b/arch/um/kernel/um_arch.c
> > +#if IS_ENABLED(CONFIG_OF_UNITTEST)
> > +       unflatten_device_tree();
> > +#endif
>
> Kind of strange to have this in the arch code. I'd rather have this in
> the unittest code if possible. Can we have an initcall conditional on
> CONFIG_UM in the unittest do this? Side note, use a C if with
> IS_ENABLED() whenever possible instead of pre-processor #if.

Yeah, that makes more sense. I will send a separate patch.

>
> I'll take a fix separately as it was on my todo to fix. I've got the
> unit tests running in a gitlab CI job now[1].
>
> Rob
>
> [1] https://gitlab.com/robherring/linux-dt-unittest/pipelines