netdev - Re: arm: shmobile_defconfig: ld.lld: error: undefined symbol: lynx_pcs

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Date: Tue, 06 Jun 2023 12:34:43 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Geert Uytterhoeven" <geert@...ux-m68k.org>
Cc: "Naresh Kamboju" <naresh.kamboju@...aro.org>,
 "open list" <linux-kernel@...r.kernel.org>,
 linux-next <linux-next@...r.kernel.org>, lkft-triage@...ts.linaro.org,
 clang-built-linux <llvm@...ts.linux.dev>,
 Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
 "Linux ARM" <linux-arm-kernel@...ts.infradead.org>,
 Netdev <netdev@...r.kernel.org>, "Nathan Chancellor" <nathan@...nel.org>,
 "Nick Desaulniers" <ndesaulniers@...gle.com>,
 "Anders Roxell" <anders.roxell@...aro.org>,
 "Geert Uytterhoeven" <geert+renesas@...der.be>,
 "David S . Miller" <davem@...emloft.net>,
 "Eric Dumazet" <edumazet@...gle.com>, "Jakub Kicinski" <kuba@...nel.org>,
 "Paolo Abeni" <pabeni@...hat.com>,
 "Maxime Coquelin" <mcoquelin.stm32@...il.com>, maxime.chevallier@...tlin.com,
 "Simon Horman" <simon.horman@...igine.com>
Subject: Re: arm: shmobile_defconfig: ld.lld: error: undefined symbol: lynx_pcs_destroy

On Tue, Jun 6, 2023, at 12:31, Geert Uytterhoeven wrote:
> On Tue, Jun 6, 2023 at 12:21 PM Arnd Bergmann <arnd@...db.de> wrote:
>> On Tue, Jun 6, 2023, at 11:28, Geert Uytterhoeven wrote:
>> > On Tue, Jun 6, 2023 at 11:16 AM Arnd Bergmann <arnd@...db.de> wrote:
>> >> On Tue, Jun 6, 2023, at 11:01, Geert Uytterhoeven wrote:
>> >>
>> >> This won't work when PCS_LYNX is a loadable module and
>> >> STMMAC is built-in. I think we should just select PCS_LYNX
>> >
>> > Oops, you're right, forgot about that case.
>> > What about using IS_REACHABLE() instead?
>> > No, that won't work either, as DWMAC_SOCFPGA can be modular,
>> > with STMMAC builtin.
>>
>> It would work because of the 'select PCS_LYNX' below DWMAC_SOCFPGA,
>
> That was my first thought, but it won't work, as DWMAC_SOCFPGA=m
> causes PCS_LYNX=m, while main STMMAC can still be builtin.

Right, got it now.

     Arnd