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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 2877EC48BD1 for ; Fri, 11 Jun 2021 10:17:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08A0A613C9 for ; Fri, 11 Jun 2021 10:17:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231725AbhFKKS4 (ORCPT ); Fri, 11 Jun 2021 06:18:56 -0400 Received: from mail-lf1-f52.google.com ([209.85.167.52]:37831 "EHLO mail-lf1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230436AbhFKKSy (ORCPT ); Fri, 11 Jun 2021 06:18:54 -0400 Received: by mail-lf1-f52.google.com with SMTP id p7so7804787lfg.4 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=WyXBPLpN+wtEctnEEqICF1UYWICFGjvXR/LOC8INVGRRaOXtYsUtswduXhXu97pRXc 7HXWGn4ajBuCwW2RJX95/UWpFX2rZFRkSW910nMiKXvIBbRy/UsKptRMMdtZ3JdPUIsL L9dbhfKYf6bnXr8yPAvvUglZgSH8zygpHY9DhsGBrvSaXGSH7C1CMEWq6VwuZ5sDpEM0 DS4aH2DWrxc8V+uCGml2Cqok/snn7AGV1YfCVNbLc5tD7NM2B1aYxs3iGa+8FhGdxAkO GLGhkz7vKF+0btDpmq37gauD49E+fTTS61CkhFXOjSLqK+zJTJNxrmvt42kFy3B2tSUQ 2y1A== X-Gm-Message-State: AOAM5305M1dZ+AzGh3Ze0lB6IDkk2c0RceVf3otP+8AjFetNT2lRNnFi HaAXl/Q61ddCDGyH8gNEaqhTbw== X-Google-Smtp-Source: ABdhPJxBZ9vK96gsXAjYydEfz9jpbzWYekseICjHgXuXnxlGOrppnbIcfyEiu+1iDIBmJWbn3ZVHbg== 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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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.