linux-kernel - Re: [PATCH v2 5/5] of/fdt: only store the device node basename in full

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Message-ID: <CANk1AXTLT9gB_f0GZLODpppjkxqDAp1x1RZmQ8O1i+UHckimxw@mail.gmail.com>
Date:   Tue, 17 Oct 2017 16:32:53 -0500
From:   Alan Tull <atull@...nel.org>
To:     Rob Herring <robh@...nel.org>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        David Laight <David.Laight@...lab.com>
Subject: Re: [PATCH v2 5/5] of/fdt: only store the device node basename in full_name

On Mon, Aug 21, 2017 at 10:16 AM, Rob Herring <robh@...nel.org> wrote:

Hi Rob,

> With dependencies on a statically allocated full path name converted to
> use %pOF format specifier, we can store just the basename of node, and
> the unflattening of the FDT can be simplified.
>
> This commit will affect the remaining users of full_name. After
> analyzing these users, the remaining cases should only change some print
> messages. The main users of full_name are providing a name for struct
> resource. The resource names shouldn't be important other than providing
> /proc/iomem names.
>
> We no longer distinguish between pre and post 0x10 dtb formats as either
> a full path or basename will work. However, less than 0x10 formats have
> been broken since the conversion to use libfdt (and no one has cared).
> The conversion of the unflattening code to be non-recursive also broke
> pre 0x10 formats as the populate_node function would return 0 in that
> case.
>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> v2:
> - rebase to linux-next
>
>  drivers/of/fdt.c | 69 +++++++++-----------------------------------------------
>  1 file changed, 11 insertions(+), 58 deletions(-)

I've just updated to the latest next branch and am finding problems
applying overlays.   Reverting this commit alleviates things.  The
errors I get are:

[   88.498704] OF: overlay: Failed to apply prop @/__symbols__/clk_0
[   88.513447] OF: overlay: apply failed '/__symbols__'
[   88.518423] create_overlay: Failed to create overlay (err=-12)

My branch also includes Pantelis' patch that turns on symbols [1].

Alan

[1] https://github.com/pantoniou/linux-beagle-track-mainline/commit/486c87d450f2895a766c6097328d0c6538ec7a31