From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7F1D9204684 for ; Mon, 16 Dec 2024 11:50:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734349814; cv=none; b=axYWQsrNM3MqCDNyNpcAn48UliXGaR+pJ2Hl6QyL/dYeWyPSIHE+TdIDnPcvu3gId2d5h5fXGTzs0kjaD9BvXCKDTZ8jNlg5dDofF5Tbx0OCLhDJDgPhlyiz9rbXBXB7ceSXAoTvsuz2AYTxajyGxmoOLH6ggfRcD6TbeCGfqIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734349814; c=relaxed/simple; bh=RyiC6CTxjFlvt11l6QOa8TlUBlD7SWpUaXebEuiEjU4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=LL314MyKG0kMh2ZgKuR2M2PscqDY1zxtDOE0GTIyz/OBGxzhp3QnZsWQ6jo0BWeHl/zx/ltOL+u54/9fN4zFIyGUNqhCG7GTQXpay51oHyy3kXkR/PkEO49L+KjS+Bxsm4ikzLa9TTUKxXynzwM2J9Npg43b4ZEgxJzh1Rpu7zk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 C67FF113E; Mon, 16 Dec 2024 03:50:38 -0800 (PST) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AAC2B3F58B; Mon, 16 Dec 2024 03:50:08 -0800 (PST) From: Yeoreum Yun To: suzuki.poulose@arm.com, mike.leach@linaro.org, james.clark@linaro.org, alexander.shishkin@linux.intel.com, bigeasy@linutronix.de, clrkwllms@kernel.org, rostedt@goodmis.org Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, Yeoreum Yun Subject: [PATCH v3 0/9] coresight: change some driver' spinlock type to raw_spinlock_t Date: Mon, 16 Dec 2024 11:49:57 +0000 Message-Id: <20241216115006.415861-1-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In some coresight drivers, drvdata->spinlock can be held during __schedule() by perf_event_task_sched_out()/in(). Since drvdata->spinlock type is spinlock_t and perf_event_task_sched_out()/in() is called after acquiring rq_lock, which is raw_spinlock_t (an unsleepable lock), this poses an issue in PREEMPT_RT kernel where spinlock_t is sleepable. To address this,change type drvdata->spinlock in some coresight drivers, which can be called by perf_event_task_sched_out()/in(), from spinlock_t to raw_spinlock_t. Reviewed-by: James Clark v2 to v3: - Fix build error v1 to v2: - seperate patchsets to change locktype and apply gurad API. Yeoreum Yun (9): coresight: change coresight_device lock type to raw_spinlock_t coresight-etm4x: change etmv4_drvdata spinlock type to raw_spinlock_t coresight: change coresight_trace_id_map's lock type to raw_spinlock_t coresight-cti: change cti_drvdata spinlock's type to raw_spinlock_t coresight-etb10: change etb_drvdata spinlock's type to raw_spinlock_t coresight-funnel: change funnel_drvdata spinlock's type to raw_spinlock_t coresight-replicator: change replicator_drvdata spinlock's type to raw_spinlock_t coresight-tmc: change tmc_drvdata spinlock's type to raw_spinlock_t coresight/ultrasoc: change cti_drvdata spinlock's type to raw_spinlock_t .../hwtracing/coresight/coresight-config.c | 8 +- .../hwtracing/coresight/coresight-config.h | 2 +- drivers/hwtracing/coresight/coresight-core.c | 2 +- .../hwtracing/coresight/coresight-cti-core.c | 44 +-- .../hwtracing/coresight/coresight-cti-sysfs.c | 76 +++--- drivers/hwtracing/coresight/coresight-cti.h | 2 +- drivers/hwtracing/coresight/coresight-etb10.c | 26 +- .../coresight/coresight-etm4x-core.c | 18 +- .../coresight/coresight-etm4x-sysfs.c | 250 +++++++++--------- drivers/hwtracing/coresight/coresight-etm4x.h | 2 +- .../hwtracing/coresight/coresight-funnel.c | 12 +- .../coresight/coresight-replicator.c | 12 +- .../hwtracing/coresight/coresight-syscfg.c | 26 +- .../hwtracing/coresight/coresight-tmc-core.c | 6 +- .../hwtracing/coresight/coresight-tmc-etf.c | 48 ++-- .../hwtracing/coresight/coresight-tmc-etr.c | 40 +-- drivers/hwtracing/coresight/coresight-tmc.h | 2 +- .../hwtracing/coresight/coresight-trace-id.c | 22 +- drivers/hwtracing/coresight/ultrasoc-smb.c | 12 +- drivers/hwtracing/coresight/ultrasoc-smb.h | 2 +- include/linux/coresight.h | 4 +- 21 files changed, 308 insertions(+), 308 deletions(-) -- LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}