linux-kernel - Re: [Sound-open-firmware] [PATCH] ASoC: SOF: build compression interface into snd

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Date:   Mon, 8 Nov 2021 19:11:23 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     Daniel Baluta <daniel.baluta@....com>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Liam Girdwood <lgirdwood@...il.com>,
        Bud Liviu-Alexandru <budliviu@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Paul Olaru <paul.olaru@....nxp.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        sound-open-firmware@...a-project.org
Subject: Re: [Sound-open-firmware] [PATCH] ASoC: SOF: build compression
 interface into snd_sof.ko

On Mon, Nov 8, 2021 at 6:18 PM Pierre-Louis Bossart
<pierre-louis.bossart@...ux.intel.com> wrote:
> On 11/8/21 10:15 AM, Arnd Bergmann wrote:
> > On Mon, Nov 8, 2021 at 3:13 PM Daniel Baluta <daniel.baluta@....com> wrote:
>
> On a related note, with this randconfig we have a separate problem on an
> AMD patch on the SOF tree
>
> ERROR: modpost: "snd_amd_acp_find_config"
> [sound/soc/amd/snd-acp-config] is a static EXPORT_SYMBOL
>
> That wasn't detected earlier, any idea what Kconfig option I need to
> enable to filter this out?

I don't see that symbol on linux-next at all, so this must be a bug
that is specific to the
current SOF tree. The message tells you that snd_amd_acp_find_config should
not be exported at all since it's static, or it should not be marked
static because it
is used by other modules. IOW having a symbol that is both static and exported
means it's not usable from built-in drivers.

       Arnd