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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 188DACA1007 for ; Wed, 3 Sep 2025 06:11:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 67F4E10E091; Wed, 3 Sep 2025 06:11:27 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="OhG5GB8k"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9608610E052; Wed, 3 Sep 2025 06:11:25 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 45E8960236; Wed, 3 Sep 2025 06:11:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2C74C4CEF0; Wed, 3 Sep 2025 06:11:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756879884; bh=DEWGVqilbGOs6UgUqJ9p5sDy7a3JODRL7uL+KLdqaDM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=OhG5GB8keEQ58YNgxAI/Sjc1rocLhOfxCLl/XZwlEzS1WCwat/fRihODLk7ZhvcWr H3XYzOgamWZw2UP1IcvzjzFaTBdCBESmwBjW57Q0I4QlZ/cxF1rW0y5KmmG5aM1SZs 0uwLCKpyV6hM1ZLubZDbjoGbQOQY4z6fZm3zXiREW8Xa2eaDBHXBu8+MrVOXj9aNfo pqJnCWRxzZG176Yw/RX5egzLS+IB1ebxgjYZCtkELZ6V0YgtZVtdAYK9klO4OCqnRM DQ1ON/yN8nE1oOUXnkRR5ccXnOp7joOzEV/f+6jB4MMYU965FZbZcYRzziTXfVhat1 LzBIkLuy7dzZg== Message-ID: <04ca5584-b10e-465d-bbda-627b7f743ce9@kernel.org> Date: Wed, 3 Sep 2025 08:11:12 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 12/12] PM: EM: Use scope-based cleanup helper To: Zihuan Zhang Cc: airlied@gmail.com, alim.akhtar@samsung.com, beata.michalska@arm.com, ben.horgan@arm.com, bp@alien8.de, catalin.marinas@arm.com, cw00.choi@samsung.com, daniel.lezcano@kernel.org, dave.hansen@linux.intel.com, dri-devel@lists.freedesktop.org, edubezval@gmail.com, festevam@gmail.com, imx@lists.linux.dev, intel-gfx@lists.freedesktop.org, j-keerthy@ti.com, jani.nikula@linux.intel.com, kernel@pengutronix.de, kyungmin.park@samsung.com, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, lukasz.luba@arm.com, mpe@ellerman.id.au, myungjoo.ham@samsung.com, pavel@kernel.org, ptsm@linux.microsoft.com, rafael@kernel.org, rodrigo.vivi@intel.com, rui.zhang@intel.com, s.hauer@pengutronix.de, shawnguo@kernel.org, simona@ffwll.ch, srinivas.pandruvada@linux.intel.com, sudeep.holla@arm.com, sumitg@nvidia.com, thierry.reding@gmail.com, tursulin@ursulin.net, viresh.kumar@linaro.org, will@kernel.org, yangyicong@hisilicon.com, zhenglifeng1@huawei.com References: <20250903021230.1044454-1-zhangzihuan@kylinos.cn> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 03/09/2025 04:12, Zihuan Zhang wrote: >> You are not improving the source code here. This is not how to use >> __free() and you clearly do not understand the source code. > > Sorry for the problem, policy should be assigned after cpumask_test_cpu(). > > I actually realized earlier that __free() only frees at the end of the variable’s lifetime. > I had suggested using a braced macro in cpufreq.h to allow immediate release after use, > but I understand the maintainer’s advice to “keep it simple” and will follow that. > >> What's more, you did not use standard tools which would tell you this is >> buggy and wrong. > > Could you please let me know which standard tools you recommend for detecting such issues? > > I’d like to use them to avoid similar mistakes in the future. All standard tools used for kernel development, sparse, smatch, clang, coccinelle, see my talk from OSSE25. Best regards, Krzysztof