From patchwork Fri Jun 11 10:15:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 458500 Delivered-To: patch@linaro.org Received: by 2002:a02:735a:0:0:0:0:0 with SMTP id a26csp632173jae; Fri, 11 Jun 2021 03:16:46 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx/WwrS28/o8Kel5eCQrBoR4VmPULzXL/R78cD87kz/i0VOaeIlfgUsr63VnYUbLg7vwP1o X-Received: by 2002:a17:906:29c8:: with SMTP id y8mr2970760eje.312.1623406606664; Fri, 11 Jun 2021 03:16:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623406606; cv=none; d=google.com; s=arc-20160816; b=s+5qAvean/skQTkTJfhzImKmDwZ7D12eiD/w87PYqbscc4qEonzBKUYuFEaiOPXj/V 5Opgy4DhCMgO+Aqm8NwhoeHb/DxqAFsdJBtz+ZY6NB7HB30y72Hw9PiUWHNyZ4OV6rKs OBxUhtbxOCpPdqnVF2xkE14td4Y7bOvG+k+w6DrMEJBfwHJyBKdx/SK6sgYiQXXPgTM4 gBBctIwOci7H8/byRXv1Z8FZGjgPRDkD2Ew2NECeUrisyNXUUgZsiNUYa6NI5HFXvYsb 54E1+LlH1FvpO+RyER0IN3Qs5PH0ysrausk7Wr2wSajDmd8Tdd7TrB1Tb99TBMDQXdO8 +S7Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=NHSHhv8DH5N4EUCGo4h1bBiaEnjkumBewOX9z/LMwSQ=; b=cSYhCCIBL0Tlui+ZsqjjrqNJi56aK2vFsxbt5Q4fRcwRt108+pry2z4E3aG5p5NNql /2LY8BuCC40juX0EcxliAmryHuD+QkHc7I4NX5CLqdXwn6OhNfUHxwI3H+fY7sqHi/ai oGd4UdTqaLIKSPwBpMfK5D/MqmBQhvpC9ylndSTEqlaqKWvvgvTbUsSkgtSC7zxFwVi6 s4D04/5RnT+97MzqYIOcUHl4likkpULg4XfukibuSE4I+7ozCUr0bh9f78FchCLCVbGi lRyfcK2yEVMZ3924ZpmfV8sDreS4l7yox3qiyl+Y7jjsMOtOIs/GBHl88NMHLOxqKHWP wDWA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=QA4jVvVN; spf=pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id q19si4883808edv.125.2021.06.11.03.16.46; Fri, 11 Jun 2021 03:16:46 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=QA4jVvVN; spf=pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230291AbhFKKSn (ORCPT + 8 others); Fri, 11 Jun 2021 06:18:43 -0400 Received: from mail-lf1-f41.google.com ([209.85.167.41]:41856 "EHLO mail-lf1-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230233AbhFKKSm (ORCPT ); Fri, 11 Jun 2021 06:18:42 -0400 Received: by mail-lf1-f41.google.com with SMTP id j20so7768255lfe.8 for ; Fri, 11 Jun 2021 03:16:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NHSHhv8DH5N4EUCGo4h1bBiaEnjkumBewOX9z/LMwSQ=; b=QA4jVvVN4LCK88DiOg8DHx/xUKJiUsKHH/u21a9FmFHZL+Mu4uDVyUK9ki3+EcaVxz l8i74R7wCybyiqMTz0t99+VmhIk78TEVsDZAO6Y0Tg7ZtZVKpxYHkymUtDp4azG7fk02 e7JFw3FLOa1RNG6Ss4gobTt1yM3BVT8z3tv1VxOx/vw3h71hR1fcYjxY/qopX2Th8qX4 R7p2gDkyCBj2FaHhT07M7s2WQyPi/M5PQP+mWTfAzUr3TCBLnh/t7XzHRShCnSldQHIf kEH5i1W5hA4dO5K+7MW53czeYfRE05QCQmqnwp653Ehpywb6BVwIV37Zj44BoXx4bwEC fruQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NHSHhv8DH5N4EUCGo4h1bBiaEnjkumBewOX9z/LMwSQ=; b=LxG3PIQ6Ao512OyDui9tVKvKdzIzEyMrV8lhhbWiVZDQt8AOiNZz2DA11s61qSljUA +JoPjJD70COZJGqXViIdXBSWVcSloRMOilCYy6cmqzAtlNeWM8EPhpsQsgLvm1LB9JIq ILVikDowmjs5SXE57Kzq+xBQ1ZL8dwF9XXalLzE5ES5l0l4g9J1VHZneNl74ET6R1uvk o3Yp+t+0dtXTxW/Td6YeXy5Dc+ICCG7jtJbwoiWmU2P6xvxkGD3uclX+kVWDPoOTEwyl Os5ArJo1RJL7uaXsvp2X2jCHwhGu+7rb0ArRZqi1AKuM979ThswCsndNQ7bzxIxcT8k6 BEvg== X-Gm-Message-State: AOAM531YfR7b+1NEcvqk0se1IGNYrp0nfcVZS9QYR+nDfRps2RXsqjEQ bLDsfR5WObXBfKqyMhS1J/zu0A== X-Received: by 2002:ac2:58e8:: with SMTP id v8mr2231704lfo.35.1623406544295; Fri, 11 Jun 2021 03:15:44 -0700 (PDT) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id b28sm552097lfp.197.2021.06.11.03.15.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Jun 2021 03:15:43 -0700 (PDT) From: Dmitry Baryshkov To: "Rafael J. Wysocki" , Kevin Hilman , Ulf Hansson , Greg Kroah-Hartman Cc: Bjorn Andersson , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] PM: domains: use separate lockdep class for each genpd Date: Fri, 11 Jun 2021 13:15:38 +0300 Message-Id: <20210611101540.3379937-1-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org It is not possible to always use mutex nesting when locking/unlocking genpds. See for example the trace in the patch#2, where genpd calls are broken with regulator calls (genpd enables regulator, regulator uses another genpd). This causes lockdep to print a false warning and stop reporting further warnings. Break this by introducing per-domain lock classes and use them to clearly track genpd locking sequences.