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Message-ID: <8969d6d5-a337-d794-0ebc-43a6ce40c102@gmail.com>
Date:   Fri, 23 Mar 2018 18:31:06 -0700
From:   Frank Rowand <frowand.list@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>, Frank.Rowand@...y.com
Cc:     Arnd Bergmann <arnd@...db.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [RFC] drm: rcar-du: keep temporary dtb files around
 during build

Hi Geert,

On 03/22/18 07:26, Geert Uytterhoeven wrote:
> Hi Frank,
> 
> On Fri, Mar 16, 2018 at 2:39 AM,  <Frank.Rowand@...y.com> wrote:
>> On Thursday, March 15, 2018 8:37 AM, Arnd Bergmann [mailto:arnd@...db.de]  wrote:
>>>
>>> The *.dtb and *.dtb.S files get removed by 'make' during the build
>>> process,
>>> and later seem to be missed during the 'modpost' stage:
>>>
>>> rm drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dtb
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dtb
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dtb.S
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dtb.S
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dtb.S
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dtb
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dtb
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dtb
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dtb.S
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dtb.S
>>> WARNING: could not open
>>> drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dtb.S: No such file or
>>> directory
>>>
>>> As a workaround, this adds all those files to the 'extra-y' target list,
>>> but that's really ugly. Any ideas for a better fix?
>>
>> Does this work for you (untested, but the way it is done in
>> drivers/of/unittest-data/Makefile):
>>
>> .PRECIOUS: \
>>         $(obj)/%.dtb.S \
>>         $(obj)/%.dtb
> 
> Shouldn't that just be moved to scripts/Makefile.lib, just above the rule
> to make dtb.S, like is done for other precious objects?
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 

Thank you for adding Yamada-san (later in this thread).

I acked his patch series that does what you suggest.

-Frank

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