linux-kernel - Re: [PATCH v4 2/2] of: Add unit tests for applying overlays

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Date:   Tue, 25 Jul 2017 15:36:29 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Frank Rowand <frowand.list@...il.com>
Cc:     Stephen Boyd <stephen.boyd@...aro.org>,
        Michal Marek <mmarek@...e.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH v4 2/2] of: Add unit tests for applying overlays

On Tue, Apr 25, 2017 at 7:09 PM,  <frowand.list@...il.com> wrote:
> From: Frank Rowand <frank.rowand@...y.com>
>
> Existing overlay unit tests examine individual pieces of the overlay
> code.  The new tests target the entire process of applying an overlay.
>
> Signed-off-by: Frank Rowand <frank.rowand@...y.com>
> ---

[...]

> @@ -1261,6 +1263,8 @@ void __init unflatten_device_tree(void)
>
>         /* Get pointer to "/chosen" and "/aliases" nodes for use everywhere */
>         of_alias_scan(early_init_dt_alloc_memory_arch);
> +
> +       unittest_unflatten_overlay_base();

This breaks on systems that don't boot with FDT and call
unflatten_device_tree, namely x86 and UML (UML needs a few hacks to
work) which was a feature of the unittest. Considering applying
overlays on x86 is something we'll want to support, the unittest
should support that case.

Rob