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=-11.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 0E1A4C433E2 for ; Sun, 13 Sep 2020 13:12:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0BA72158C for ; Sun, 13 Sep 2020 13:12:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725938AbgIMNMc (ORCPT ); Sun, 13 Sep 2020 09:12:32 -0400 Received: from foss.arm.com ([217.140.110.172]:54422 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725919AbgIMNMa (ORCPT ); Sun, 13 Sep 2020 09:12:30 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1E573106F; Sun, 13 Sep 2020 06:12:29 -0700 (PDT) Received: from [192.168.0.21] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 93AB43F68F; Sun, 13 Sep 2020 06:12:25 -0700 (PDT) Subject: Re: [PATCH v10 09/24] coresight: etm3x: allow etm3x to be built as a module To: tingwei@codeaurora.org, mathieu.poirier@linaro.org, alexander.shishkin@linux.intel.com, mike.leach@linaro.org Cc: kim.phillips@arm.com, gregkh@linuxfoundation.org, leo.yan@linaro.org, rdunlap@infradead.org, linux@armlinux.org.uk, ykaukab@suse.de, tsoni@codeaurora.org, saiprakash.ranjan@codeaurora.org, jinlmao@codeaurora.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20200821034445.967-1-tingwei@codeaurora.org> <20200821034445.967-10-tingwei@codeaurora.org> From: Suzuki K Poulose Message-ID: <0c2abd02-4fe6-5eaa-e9d3-41811f062ac1@arm.com> Date: Sun, 13 Sep 2020 14:17:05 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20200821034445.967-10-tingwei@codeaurora.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/21/2020 04:44 AM, Tingwei Zhang wrote: > From: Kim Phillips > > Allow to build coresight-etm3x as a module, for ease of development. > > - Kconfig becomes a tristate, to allow =m > - append -core to source file name to allow module to > be called coresight-etm3x by the Makefile > - add an etm_remove function, for module unload > - add a MODULE_DEVICE_TABLE for autoloading on boot > > Cc: Mathieu Poirier > Cc: Leo Yan > Cc: Alexander Shishkin > Cc: Randy Dunlap > Cc: Suzuki K Poulose > Cc: Greg Kroah-Hartman > Cc: Russell King > Signed-off-by: Kim Phillips > Signed-off-by: Tingwei Zhang > Reviewed-by: Mike Leach > diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c > similarity index 97% > rename from drivers/hwtracing/coresight/coresight-etm3x.c > rename to drivers/hwtracing/coresight/coresight-etm3x-core.c > index bf22dcfd3327..ba9c86497acb 100644 > --- a/drivers/hwtracing/coresight/coresight-etm3x.c > +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c > @@ -895,6 +895,23 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id) > return ret; > } > > +static int __exit etm_remove(struct amba_device *adev) > +{ > + struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev); > + > + etm_perf_symlink(drvdata->csdev, false); > + > + if (--etm_count == 0) { > + cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING); > + if (hp_online) > + cpuhp_remove_state_nocalls(hp_online); > + } > + > + coresight_unregister(drvdata->csdev); > + > + return 0; > +} > + Don't we need to fix the races like we did for ETMv4 ? Suzuki