From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFB39C47086 for ; Tue, 25 May 2021 12:19:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6EEC6141C for ; Tue, 25 May 2021 12:19:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232384AbhEYMUo convert rfc822-to-8bit (ORCPT ); Tue, 25 May 2021 08:20:44 -0400 Received: from mail-ua1-f49.google.com ([209.85.222.49]:40724 "EHLO mail-ua1-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232353AbhEYMUn (ORCPT ); Tue, 25 May 2021 08:20:43 -0400 Received: by mail-ua1-f49.google.com with SMTP id z14so9355346uan.7; Tue, 25 May 2021 05:19:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=cflgo9YlhNLzTQ60SgvCsB3WgfxJaPc1W7VnDb/cs9M=; b=LDk/dTZGFfFBOnhqhUeE1Acr5XkNSQiOzlbd3BJXY5NoxQjeSKX4TyTu3OoyfW3Clb uMPAjdpHhyTyh3WQ2MCfbRc2OaM2iG7SKEKq/jerR+dvlTV+OvlC67t1ueASuBL2ykpq yev3FIscQGvsPjUyQ+w9gTUaZexfOxvWIH9sRjSkaiDye5Mc67jq3fcrUcpLDHT/A5nJ 67gbVxeJLThC6Q4JCFyZFMrdrLZvwNwyzPW6EwRnz0sQI+pScRowe+n9vf4HB4cwFIZg ojEsh6WGTSilIoTQSQpEGPq9FGizYbUDKxI709yHPZrXm34xYfO8oi4P17wcjYzmwoyR r5dw== X-Gm-Message-State: AOAM530yV8THWdZ2DFohZoCl9EldqBaVql7pwh27bjpzsAFxvKRDjh4s Q7w373gDXbBOzENlfVvpEdNfjzUGLsTor55nMsI= X-Google-Smtp-Source: ABdhPJxb73scnc9iMaNZBOCcPhRZmkJ74QOEAKvaJx8dDb4KvKhoSSYw8rxoeu5H1uuhrw83tIPuW9y+8LIMsJgzL6Y= X-Received: by 2002:a05:6122:3c:: with SMTP id q28mr484453vkd.5.1621945152471; Tue, 25 May 2021 05:19:12 -0700 (PDT) MIME-Version: 1.0 References: <20210523232556.15017-1-digetx@gmail.com> <8b6af8c0-6f01-193f-1eb4-4e230871f0cd@gmail.com> In-Reply-To: From: Geert Uytterhoeven Date: Tue, 25 May 2021 14:19:01 +0200 Message-ID: Subject: Re: [PATCH v1] kbuild: Disable compile testing if HAVE_LEGACY_CLK enabled To: Krzysztof Kozlowski Cc: Dmitry Osipenko , Thierry Reding , Jonathan Hunter , Stephen Boyd , Tony Lindgren , Arnd Bergmann , Paul Burton , John Crispin , "open list:BROADCOM NVRAM DRIVER" , Linux ARM , linux-m68k , Linux Kernel Mailing List , linux-tegra , linux-clk , "open list:TI ETHERNET SWITCH DRIVER (CPSW)" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Hi Krzysztof, On Tue, May 25, 2021 at 2:04 PM Krzysztof Kozlowski wrote: > On 24/05/2021 08:39, Dmitry Osipenko wrote: > > 24.05.2021 11:54, Geert Uytterhoeven пишет: > >> On Mon, May 24, 2021 at 1:26 AM Dmitry Osipenko wrote: > >>> There are couple older platforms that can't be compile-tested because they > >>> partially implement CLK API. It causes build failure of kernel drivers due > >>> to the missing symbols of the unimplemented part of CLK API. > >>> > >>> These platforms are: ARM EP93XX, ARM OMAP1, m68k ColdFire, MIPS AR7, > >>> MIPS Ralink. > >>> > >>> Disable compile-testing for HAVE_LEGACY_CLK=y. > >>> > >>> Reported-by: kernel test robot > >>> Signed-off-by: Dmitry Osipenko > >> > >> Thanks for your patch! > >> > >>> --- a/init/Kconfig > >>> +++ b/init/Kconfig > >>> @@ -131,7 +131,7 @@ config INIT_ENV_ARG_LIMIT > >>> > >>> config COMPILE_TEST > >>> bool "Compile also drivers which will not load" > >>> - depends on HAS_IOMEM > >>> + depends on HAS_IOMEM && !HAVE_LEGACY_CLK > >> > >> That sounds a bit drastic to me. Usually we just try to implement the > >> missing functionality, or provide stubs. > >> Which functions are missing? > > > > Everything that belongs to CONFIG_COMMON_CLK needs stubs. > > > > That is everything under CONFIG_HAVE_CLK [1], excluding functions > > belonging to clk-devres.o and clk-bulk.o [2]. The HAVE_LEGACY_CLK > > selects HAVE_CLK, but the COMMON_CLK is under HAVE_CLK too. > > > > [1] > > https://elixir.bootlin.com/linux/v5.13-rc3/source/include/linux/clk.h#L786 > > [2] > > https://elixir.bootlin.com/linux/v5.13-rc3/source/drivers/clk/Makefile#L3 > > > > This problem is repeated over and over again for the past years. Some > > maintainers are adding "depends on COMMON_CLK" for COMPILE_TEST of each > > driver, but this doesn't solve the root of the problem, and thus, it's > > constantly reoccurring. > > > > Recently Krzysztof Kozlowski added couple more clk stubs for MIPS, but > > still lots of stubs are missing. Some platforms don't have any stubs at > > all and apparently nobody cares to fix them. > > > > There 3 possible solutions: > > > > 1. Factor out COMMON_CLK from HAVE_LEGACY_CLK, if this is possible > > 2. Build stubs universally, maybe using weak functions. > > I vote for this one - global stubs. Yep. > Or for a new one: > 4. Disable COMPILE_TEST for specific platforms (mentioned in commit > msg). Eventually could be like: > config RALINK > depends !COMPILE_TEST || (COMPILE_TEST && COMMON_CLK) That's a neat idea! Of course there's a fifth option: 5. Convert legacy platforms to COMMON_CLK. Which is already happening for ARM EP93XX. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5907C2B9F8 for ; Tue, 25 May 2021 12:21:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 883C46141C for ; Tue, 25 May 2021 12:21:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 883C46141C Authentication-Results: mail.kernel.org; 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Tue, 25 May 2021 05:19:12 -0700 (PDT) MIME-Version: 1.0 References: <20210523232556.15017-1-digetx@gmail.com> <8b6af8c0-6f01-193f-1eb4-4e230871f0cd@gmail.com> In-Reply-To: From: Geert Uytterhoeven Date: Tue, 25 May 2021 14:19:01 +0200 Message-ID: Subject: Re: [PATCH v1] kbuild: Disable compile testing if HAVE_LEGACY_CLK enabled To: Krzysztof Kozlowski Cc: Dmitry Osipenko , Thierry Reding , Jonathan Hunter , Stephen Boyd , Tony Lindgren , Arnd Bergmann , Paul Burton , John Crispin , "open list:BROADCOM NVRAM DRIVER" , Linux ARM , linux-m68k , Linux Kernel Mailing List , linux-tegra , linux-clk , "open list:TI ETHERNET SWITCH DRIVER (CPSW)" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210525_051914_073398_CB149A25 X-CRM114-Status: GOOD ( 32.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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