From patchwork Mon Dec 2 09:24:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 13890177 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 016F6D10DDD for ; Mon, 2 Dec 2024 09:30:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=xDo53sRToS3Oqod4PT26cC1RE5TW7V+qPTtywAFWYM4=; b=nM+uw7oZbXLxGYv/IQatsHHdRB O5s+bdgNbQSopacJCxCvaPSivksyx62/5vouUic89Hdh8VELD2N9PgoF7yo2f92Mmu387//oDLJ9s HQF2D81+LO3DkllqH//eSBEGOVSCQotqLippq/7WwqdPure4rq+b6S6d/jHw8HRmqwnlopmqsVTp4 oDb5aBJfaEnQLGCKT1Q/m5tZ0l5PV7PKGM5nLSSK3yYoTWUzdb0xWbeE+o6QWdgznhcC9Hs0bKxGt 4Ac3cKFX8Psieop7KlzdQz50Ka5kgeY8D8EuLd59Xn/xjifGQCzijH6Ir9Lq1OqVNtag/4Hddwxtl P3m/Iw6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tI2l0-00000005Zln-44A7; Mon, 02 Dec 2024 09:30:18 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tI2gC-00000005YhE-296g for linux-arm-kernel@lists.infradead.org; Mon, 02 Dec 2024 09:25:22 +0000 Received: from mail.maildlp.com (unknown [172.19.163.48]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Y1yxX0gsNz11PWH; Mon, 2 Dec 2024 17:22:56 +0800 (CST) Received: from kwepemd200014.china.huawei.com (unknown [7.221.188.8]) by mail.maildlp.com (Postfix) with ESMTPS id E38A818007C; Mon, 2 Dec 2024 17:25:10 +0800 (CST) Received: from localhost.localdomain (10.50.165.33) by kwepemd200014.china.huawei.com (7.221.188.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34; Mon, 2 Dec 2024 17:25:10 +0800 From: Yicong Yang To: , , , , CC: , , , , Subject: [PATCH 0/4] Coresight TMC-ETR some bugfixes and cleanups Date: Mon, 2 Dec 2024 17:24:15 +0800 Message-ID: <20241202092419.11777-1-yangyicong@huawei.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-Originating-IP: [10.50.165.33] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemd200014.china.huawei.com (7.221.188.8) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241202_012520_714383_4E93BECC X-CRM114-Status: UNSURE ( 7.09 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yicong Yang Fix two race issues found by using TMC-ETR. Two cleanups found when debugging the issues. Patch 1/4 is suggested by Suzuki in [1] and tested to solve the original issue. [1] https://lore.kernel.org/linux-arm-kernel/20241114081653.24328-1-yangyicong@huawei.com/ Suzuki K Poulose (1): coresight: tmc: Don't reallocate the sysfs_buffer if it's in use Yicong Yang (3): coresight: tmc: Add missing doc of tmc_drvdata::reading coresight: tmc-etr: Fix race condition between sysfs and perf mode coresight: tmc-etr: Decouple the perf buffer allocation from sysfs mode .../hwtracing/coresight/coresight-tmc-etr.c | 65 +++++++++++++------ drivers/hwtracing/coresight/coresight-tmc.h | 1 + 2 files changed, 45 insertions(+), 21 deletions(-)