linux-kernel - Re: [PATCH 3/3] of: overlay: Pick up label symbols from overlays.

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Date:	Tue, 10 May 2016 09:23:43 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
Cc:	Frank Rowand <frowand.list@...il.com>,
	Matt Porter <mporter@...sulko.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Koen Kooi <koen@...inion.thruhere.net>,
	Guenter Roeck <linux@...ck-us.net>,
	Marek Vasut <marex@...x.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] of: overlay: Pick up label symbols from overlays.

On Tue, May 10, 2016 at 8:56 AM, Pantelis Antoniou
<panto@...oniou-consulting.com> wrote:
> Hi Rob,
>
>> On May 10, 2016, at 00:47 , Rob Herring <robherring2@...il.com> wrote:
>>
>> On Mon, May 9, 2016 at 1:11 PM, Pantelis Antoniou
>> <pantelis.antoniou@...sulko.com> wrote:
>>> Insert overlay symbols to the base tree when applied.
>>> This makes it possible to apply an overlay that references a label
>>> that a previously inserted overlay had.

[...]

>>> +       /* locate the symbols & fixups nodes on resolve */
>>> +       for_each_child_of_node(tree, child) {
>>> +               if (of_node_cmp(child->name, "__symbols__") == 0)
>>> +                       goto found;
>>
>> Doesn't of_get_child_by_name work here?
>>
>
> No, we’re holding of_mutex.

So. Go look at the function.

Rob