From nobody Thu Oct 31 00:24:13 2024 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 34207C7EE2F for ; Wed, 31 May 2023 11:00:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235052AbjEaLAq (ORCPT ); Wed, 31 May 2023 07:00:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232018AbjEaLAn (ORCPT ); Wed, 31 May 2023 07:00:43 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8AA612B; Wed, 31 May 2023 04:00:42 -0700 (PDT) Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4QWR880rmzz67J0f; Wed, 31 May 2023 18:58:32 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Wed, 31 May 2023 12:00:39 +0100 From: Jonathan Cameron To: Namhyung Kim , Liang Kan , , CC: , , , , , , , , Davidlohr Bueso , Dave Jiang Subject: [PATCH v8 1/5] perf: Allow a PMU to have a parent Date: Wed, 31 May 2023 12:00:07 +0100 Message-ID: <20230531110011.13963-2-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230531110011.13963-1-Jonathan.Cameron@huawei.com> References: <20230531110011.13963-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml500005.china.huawei.com (7.191.163.240) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Some PMUs have well defined parents such as PCI devices. As the device_initialize() and device_add() are all within pmu_dev_alloc() which is called from perf_pmu_register() there is no opportunity to set the parent from within a driver. Add a struct device *parent field to struct pmu and use that to set the parent. Reviewed-by: Dan Williams Reviewed-by: Greg Kroah-Hartman Acked-by: Peter Zijlstra (Intel) Signed-off-by: Jonathan Cameron --- include/linux/perf_event.h | 1 + kernel/events/core.c | 1 + 2 files changed, 2 insertions(+) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index d5628a7b5eaa..b99db1eda72c 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -303,6 +303,7 @@ struct pmu { =20 struct module *module; struct device *dev; + struct device *parent; const struct attribute_group **attr_groups; const struct attribute_group **attr_update; const char *name; diff --git a/kernel/events/core.c b/kernel/events/core.c index db016e418931..285cf6ca6e81 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -11379,6 +11379,7 @@ static int pmu_dev_alloc(struct pmu *pmu) =20 dev_set_drvdata(pmu->dev, pmu); pmu->dev->bus =3D &pmu_bus; + pmu->dev->parent =3D pmu->parent; pmu->dev->release =3D pmu_dev_release; =20 ret =3D dev_set_name(pmu->dev, "%s", pmu->name); --=20 2.39.2