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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vdkhv-0000000G89U-1UDF; Thu, 08 Jan 2026 07:45:23 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vdkhq-0000000G86v-3qBf for linux-phy@lists.infradead.org; Thu, 08 Jan 2026 07:45:19 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 907E960051; Thu, 8 Jan 2026 07:45:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3209C16AAE; Thu, 8 Jan 2026 07:45:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767858317; bh=6w/lg+NnsVA+yDAH39Ntfm5T+shyzWZk1vLqcLB71Vk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=WjTfPJ4+xySgldi2SSgqEMUmzoct3Gmt2IlxvVoFnvr/RueB5DUUvMRMp1T9+QoNJ ZViByva76/iCXUzGYOnm31X1HUNZGn1hN2BF3+DsZxGvfHSiHhkWHdlGI7bcufV7WI FzRz7Wr+Y9N2tya6hgQSX2yVyIKc7s6RZYs9m47KKlB32AlHkKvd8e+auQxuhuqgZJ vaHRJ2eB8l+zWvN0X4IJg2pbB+nnaFUoWUNZNcYC7iZKuhe/PBfxL9WGOfS4fcqrKm 4Ng6SNsCN72toMNby7oqBwa3CDTRT0PnmV8qkyL/+IJeAT10glyHSShDyzDF0CCBrv Mpc8f/CsChFLA== Message-ID: <9e172c95-25bb-4608-932c-e761b1b1802d@kernel.org> Date: Thu, 8 Jan 2026 08:45:08 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 2/7] mux: Add helper functions for getting optional and selected mux-state To: Josua Mayer , Ulf Hansson , Rob Herring , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Wolfram Sang , Marc Kleine-Budde , Vincent Mailhol , Vinod Koul , Kishon Vijay Abraham I , Peter Rosin , Aaro Koskinen , Andreas Kemnade , Kevin Hilman , Roger Quadros , Tony Lindgren , Vignesh R , Janusz Krzysztofik , Andi Shyti , Neil Armstrong , kernel test robot Cc: "oe-kbuild-all@lists.linux.dev" , Mikhail Anikin , Yazan Shhady , Jon Nettleton , "linux-mmc@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-renesas-soc@vger.kernel.org" , "linux-can@vger.kernel.org" , "linux-phy@lists.infradead.org" References: <20251229-rz-sdio-mux-v4-2-a023e55758fe@solid-run.com> <202601010305.tpY47HE4-lkp@intel.com> <3396461.44csPzL39Z@josua-pc> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On 08/01/2026 08:42, Josua Mayer wrote: > On Wednesday, 31 December 2025 21:18:51 IST kernel test robot wrote: >> Hi Josua, >> >> kernel test robot noticed the following build errors: >> >> [auto build test ERROR on 8f0b4cce4481fb22653697cced8d0d04027cb1e8] >> >> url: >> https://github.com/intel-lab-lkp/linux/commits/Josua-Mayer/phy-can-transcei >> ver-rename-temporary-helper-function-to-avoid-conflict/20251229-223153 base: >> 8f0b4cce4481fb22653697cced8d0d04027cb1e8 >> patch link: >> https://lore.kernel.org/r/20251229-rz-sdio-mux-v4-2-a023e55758fe%40solid-ru >> n.com patch subject: [PATCH v4 2/7] mux: Add helper functions for getting >> optional and selected mux-state config: parisc-randconfig-002-20260101 >> (https://download.01.org/0day-ci/archive/20260101/202601010305.tpY47HE4-lkp >> @intel.com/config) compiler: hppa-linux-gcc (GCC) 10.5.0 >> reproduce (this is a W=1 build): >> (https://download.01.org/0day-ci/archive/20260101/202601010305.tpY47HE4-lkp >> @intel.com/reproduce) >> >> If you fix the issue in a separate patch/commit (i.e. not just a new version >> of the same patch/commit), kindly add following tags >> >> | Reported-by: kernel test robot >> | Closes: >> | https://lore.kernel.org/oe-kbuild-all/202601010305.tpY47HE4-lkp@intel.com >> | / >> All error/warnings (new ones prefixed by >>): >> >> In file included from drivers/mux/core.c:19: >> >> include/linux/mux/consumer.h: In function 'mux_control_put': >>>> include/linux/mux/consumer.h:138:9: warning: 'return' with a value, in >>>> function returning void [-Wreturn-type] >> 138 | return -EOPNOTSUPP; >> >> | ^ >> > To be fixed in next version > >> include/linux/mux/consumer.h:136:20: note: declared here >> 136 | static inline void mux_control_put(struct mux_control *mux) >> >> | ^~~~~~~~~~~~~~~ >> >> drivers/mux/core.c: At top level: >>>> drivers/mux/core.c:302:14: error: redefinition of 'mux_control_states' >> >> 302 | unsigned int mux_control_states(struct mux_control *mux) >> >> | ^~~~~~~~~~~~~~~~~~ >> >> In file included from drivers/mux/core.c:19: >> include/linux/mux/consumer.h:70:28: note: previous definition of >> 'mux_control_states' was here 70 | static inline unsigned int >> mux_control_states(struct mux_control *mux) >> | ^~~~~~~~~~~~~~~~~~ > > I don't understand how this is possible. > In the header file line 136 the inline declaration for mux_control_states is > gated by ifdef CONFIG_MULTIPLEXER else case. > > The build of mux/core.c itself is gated in Makefile by CONFIG_MULTIPLEXER. > > So mux/core.c is not being built when CONFIG_MULTIPLEXER is not set. > If it is set, we hit in the header file the non-inline declaration near start > of the file. You have all the tools in this email to actually reproduce it. Did you try? Best regards, Krzysztof -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy