From nobody Fri Oct 3 08:50:44 2025 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D2112FF67E; Wed, 3 Sep 2025 13:18:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756905515; cv=none; b=Yc5GBtGy8WWOAYZsMUzAJ+65yamZybMHI/7k8KfvZiC3f6xGXECPdvT1qyZJnDnxIKzNgTvXfdo7DExXRqfAgMuQG9qD4I0dsKWjhpbQBVptH6W8fJt+G8EG7qx1pIxEWnzA5MGFG4y7LBA0+p0MFGXrr7JhxBFroGHswcqHP50= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756905515; c=relaxed/simple; bh=lBV/LXcmoSKW35TD8fJIFkXy7y0QDiiHa2xN0x50KdQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fXzlZORYH3q9fPDtHClMR3AfSLzmCjhWLdj1fbQXyAcrK0g5f7LRupJVf95UYVf2Kh36NYXvi9tCrmMZUy9FH13sCmcG57BlL1Cwqtw68WLs+zBQIFxj2aT8xTS7yjNrwyBlSMk0H/efd095pycmJV0iZQMOyMDDmRRpXB+wVwA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 770bae1888c811f0b29709d653e92f7d-20250903 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.45,REQID:0168c3e0-98fe-406d-85b1-48da848a7ccc,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:6493067,CLOUDID:2c9e1e9e5c5ada8eb7e570a730afb71d,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:81|82|102|850,TC:nil,Content:0|50,EDM:-3 ,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV :0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 770bae1888c811f0b29709d653e92f7d-20250903 Received: from mail.kylinos.cn [(10.44.16.175)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA) with ESMTP id 1452110782; Wed, 03 Sep 2025 21:18:22 +0800 Received: from mail.kylinos.cn (localhost [127.0.0.1]) by mail.kylinos.cn (NSMail) with SMTP id 65C56E008FA2; Wed, 3 Sep 2025 21:18:21 +0800 (CST) X-ns-mid: postfix-68B8401D-2351769 Received: from localhost.localdomain (unknown [172.25.120.24]) by mail.kylinos.cn (NSMail) with ESMTPA id A519FE008FA4; Wed, 3 Sep 2025 21:18:17 +0800 (CST) From: Zihuan Zhang To: "Rafael J . wysocki" , Viresh Kumar , Catalin Marinas , Will Deacon , Borislav Petkov , Dave Hansen , Srinivas Pandruvada , Michael Ellerman , Krzysztof Kozlowski , Alim Akhtar , Thierry Reding , MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Jani Nikula , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Daniel Lezcano , Sascha Hauer , Shawn Guo , Eduardo Valentin , Keerthy Cc: Ben Horgan , zhenglifeng , Zhang Rui , Len Brown , Lukasz Luba , Pengutronix Kernel Team , Beata Michalska , Fabio Estevam , Pavel Machek , Sumit Gupta , Prasanna Kumar T S M , Sudeep Holla , Yicong Yang , linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, Zihuan Zhang Subject: [PATCH v4 07/10] powercap: dtpm_cpu: Use scope-based cleanup helper Date: Wed, 3 Sep 2025 21:17:30 +0800 Message-Id: <20250903131733.57637-8-zhangzihuan@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250903131733.57637-1-zhangzihuan@kylinos.cn> References: <20250903131733.57637-1-zhangzihuan@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace the manual cpufreq_cpu_put() with __free(put_cpufreq_policy) annotation for policy references. This reduces the risk of reference counting mistakes and aligns the code with the latest kernel style. No functional change intended. Signed-off-by: Zihuan Zhang --- drivers/powercap/dtpm_cpu.c | 30 +++++++++++------------------- 1 file changed, 11 insertions(+), 19 deletions(-) diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c index 99390ec1481f..f76594185fa2 100644 --- a/drivers/powercap/dtpm_cpu.c +++ b/drivers/powercap/dtpm_cpu.c @@ -144,19 +144,17 @@ static int update_pd_power_uw(struct dtpm *dtpm) static void pd_release(struct dtpm *dtpm) { struct dtpm_cpu *dtpm_cpu =3D to_dtpm_cpu(dtpm); - struct cpufreq_policy *policy; =20 if (freq_qos_request_active(&dtpm_cpu->qos_req)) freq_qos_remove_request(&dtpm_cpu->qos_req); =20 - policy =3D cpufreq_cpu_get(dtpm_cpu->cpu); - if (policy) { + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D + cpufreq_cpu_get(dtpm_cpu->cpu); + + if (policy) for_each_cpu(dtpm_cpu->cpu, policy->related_cpus) per_cpu(dtpm_per_cpu, dtpm_cpu->cpu) =3D NULL; =20 - cpufreq_cpu_put(policy); - } - kfree(dtpm_cpu); } =20 @@ -192,7 +190,6 @@ static int cpuhp_dtpm_cpu_online(unsigned int cpu) static int __dtpm_cpu_setup(int cpu, struct dtpm *parent) { struct dtpm_cpu *dtpm_cpu; - struct cpufreq_policy *policy; struct em_perf_state *table; struct em_perf_domain *pd; char name[CPUFREQ_NAME_LEN]; @@ -202,21 +199,19 @@ static int __dtpm_cpu_setup(int cpu, struct dtpm *par= ent) if (dtpm_cpu) return 0; =20 - policy =3D cpufreq_cpu_get(cpu); + struct cpufreq_policy *policy __free(put_cpufreq_policy) =3D + cpufreq_cpu_get(cpu); + if (!policy) return 0; =20 pd =3D em_cpu_get(cpu); - if (!pd || em_is_artificial(pd)) { - ret =3D -EINVAL; - goto release_policy; - } + if (!pd || em_is_artificial(pd)) + return -EINVAL; =20 dtpm_cpu =3D kzalloc(sizeof(*dtpm_cpu), GFP_KERNEL); - if (!dtpm_cpu) { - ret =3D -ENOMEM; - goto release_policy; - } + if (!dtpm_cpu) + return -ENOMEM; =20 dtpm_init(&dtpm_cpu->dtpm, &dtpm_ops); dtpm_cpu->cpu =3D cpu; @@ -239,7 +234,6 @@ static int __dtpm_cpu_setup(int cpu, struct dtpm *paren= t) if (ret < 0) goto out_dtpm_unregister; =20 - cpufreq_cpu_put(policy); return 0; =20 out_dtpm_unregister: @@ -251,8 +245,6 @@ static int __dtpm_cpu_setup(int cpu, struct dtpm *paren= t) per_cpu(dtpm_per_cpu, cpu) =3D NULL; kfree(dtpm_cpu); =20 -release_policy: - cpufreq_cpu_put(policy); return ret; } =20 --=20 2.25.1