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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35E59C32789 for ; Tue, 23 Aug 2022 14:54:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242767AbiHWOy6 (ORCPT ); Tue, 23 Aug 2022 10:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240407AbiHWOyl (ORCPT ); Tue, 23 Aug 2022 10:54:41 -0400 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 167902FF824 for ; Tue, 23 Aug 2022 05:19:44 -0700 (PDT) Received: by mail-pg1-x52d.google.com with SMTP id v4so12090004pgi.10 for ; Tue, 23 Aug 2022 05:19:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc; bh=h3Gt6GfO7iahk4Z9hgPXcaayP+4k5NiZRatsBBvqq3I=; b=jp91CuNf82Skvn3Go665xPR4GMy50eIIwSw3xiqXHF3AEc70k9TFESW55BcprwdbDq QXXf7cevVFt3kkGMx1CFrUJSloQQx45NC5ABSD4phvkOF3dmKerUGShNblpN+spjNymo OoQHQ6PsX2JgYegEJBaGkjdNRxUKr61B6maxPGjtTX1wdyR+KssjchCArRM1LFRhzKhl BsGT8+KDFo6lE7lE3QgACghYOO7cdeXkgZvzQvcLgZaXYDdapUkFiyUEstS9ltiJGF9q ZM+XHqlhpwnE46ceHuBpT1AQg/4oIBNGrG3UCl5uMcdQalmUp+6VMg70OUG6ArBdIQG7 CiVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc; bh=h3Gt6GfO7iahk4Z9hgPXcaayP+4k5NiZRatsBBvqq3I=; b=nQRU+CM8F1Q3CqiHTYBqVXPXob+dqAeY7UhPVgMkM/8lNjdIOn8AmNuNDJVODyNcTp U60NBGc6FDi+SjN28HLVJpQ14NBAFtnvT1sbgEtX0OKZjxN307zTDY7fRtbZM+iOrnE2 UEEZcELrMFK/CxJoFkMtjrLSxy0xjkmeeRygMFJEJGKNG/YH+K09f/zIZI3BK+k+SW73 lBRYYP+hPitMyq9F/s77NE/3Vwzwv743jQWyxoA5yp1TpfE1xD7a/yj/Cg3Pfku7Ccqq a6Gb4soKyCVjuuINr5hLg+WGrdC/Cfpeh/Dq8c6bdTFwHTFtwrK+AYRe9CDAAQLHA0h/ hxew== X-Gm-Message-State: ACgBeo1wsqYQoIpWPQWXcfq/JHHDjzTBKLlBB0ukI6+S7YzOVgG5F9rx kTY4fUuFUz0CFhr92Ccknj7w4LZtft8= X-Google-Smtp-Source: AA6agR7UZf1qp2LkBQMndbgUpl3eJZqKhhxsCdF4Z8J/C8rZKqgJCtMoQxqRq6OO53NVLfLlUcARkw== X-Received: by 2002:a63:5b10:0:b0:429:c287:7bfa with SMTP id p16-20020a635b10000000b00429c2877bfamr19658653pgb.347.1661257168688; Tue, 23 Aug 2022 05:19:28 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id e8-20020a170902b78800b0016cf3f124e5sm10291661pls.131.2022.08.23.05.19.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Aug 2022 05:19:27 -0700 (PDT) Sender: Guenter Roeck Date: Tue, 23 Aug 2022 05:19:26 -0700 From: Guenter Roeck To: Jani Nikula Cc: "Nilawar, Badal" , intel-gfx@lists.freedesktop.org, linux-hwmon@vger.kernel.org, "Dixit, Ashutosh" Subject: Re: [Intel-gfx] [PATCH 1/7] drm/i915/hwmon: Add HWMON infrastructure Message-ID: <20220823121926.GD203169@roeck-us.net> References: <20220818193901.2974625-1-badal.nilawar@intel.com> <20220818193901.2974625-2-badal.nilawar@intel.com> <87ilmoo707.fsf@intel.com> <50a6d108-4518-c30e-5096-3ee921c75606@intel.com> <8735dnmgwp.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8735dnmgwp.fsf@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org On Tue, Aug 23, 2022 at 12:46:14PM +0300, Jani Nikula wrote: [ ... ] > >> > >> So why not do this in i915 Kconfig: > >> > >> config DRM_I915 > >> ... > >> depends on HWMON || HWMON=n > > With this change I am getting recursive dependancy error when I run make > > oldconfig > > > > badal@bnilawar-desk1:~/workspace/wp3/drm-tip$ make oldconfig > > HOSTCC scripts/basic/fixdep > > HOSTCC scripts/kconfig/conf.o > > HOSTCC scripts/kconfig/confdata.o > > HOSTCC scripts/kconfig/expr.o > > LEX scripts/kconfig/lexer.lex.c > > YACC scripts/kconfig/parser.tab.[ch] > > HOSTCC scripts/kconfig/lexer.lex.o > > HOSTCC scripts/kconfig/menu.o > > HOSTCC scripts/kconfig/parser.tab.o > > HOSTCC scripts/kconfig/preprocess.o > > HOSTCC scripts/kconfig/symbol.o > > HOSTCC scripts/kconfig/util.o > > HOSTLD scripts/kconfig/conf > > drivers/gpu/drm/i915/Kconfig:2:error: recursive dependency detected! > > drivers/gpu/drm/i915/Kconfig:2: symbol DRM_I915 depends on HWMON > > drivers/hwmon/Kconfig:6: symbol HWMON is selected by EEEPC_LAPTOP > > drivers/platform/x86/Kconfig:332: symbol EEEPC_LAPTOP depends on INPUT > > drivers/input/Kconfig:8: symbol INPUT is selected by DRM_I915 > > For a resolution refer to Documentation/kbuild/kconfig-language.rst > > subsection "Kconfig recursive dependency limitations" > > *sigh* > > Note: > select should be used with care. select will force > a symbol to a value without visiting the dependencies. > By abusing select you are able to select a symbol FOO even > if FOO depends on BAR that is not set. > In general use select only for non-visible symbols > (no prompts anywhere) and for symbols with no dependencies. > That will limit the usefulness but on the other hand avoid > the illegal configurations all over. > Agreed. HWMON should not be selected anywhere. Unfortunately it is, and drm is no exception. It is selected by DRM_RADEON and DRM_AMDGPU. Maybe just select it in DRM_I915 as well after all; in practice it won't make a difference. Guenter