From: Yeoreum Yun <yeoreum.yun@arm.com>
To: suzuki.poulose@arm.com, james.clark@linaro.org,
alexander.shishkin@linux.intel.com, bigeasy@linutronix.de,
clrkwllms@kernel.org, rostedt@goodmis.org, mike.leach@linaro.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 <yeoreum.yun@arm.com>
Subject: [PATCH v4 0/9] coresight: change some driver' spinlock type to raw_spinlock_t
Date: Fri, 20 Dec 2024 10:45:11 +0000 [thread overview]
Message-ID: <20241220104521.809071-1-yeoreum.yun@arm.com> (raw)
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 <james.clark@linaro.org>
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 smb_drv_data 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}
next reply other threads:[~2024-12-20 10:45 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-20 10:45 Yeoreum Yun [this message]
2024-12-20 10:45 ` [PATCH v4 1/9] coresight: change coresight_device lock " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 1/1] coresight/ultrasoc: change smb_drv_data spinlock's " Yeoreum Yun
2024-12-20 10:46 ` Yeo Reum Yun
2024-12-20 10:45 ` [PATCH v4 2/9] coresight-etm4x: change etmv4_drvdata spinlock " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 3/9] coresight: change coresight_trace_id_map's lock " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 4/9] coresight-cti: change cti_drvdata spinlock's " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 5/9] coresight-etb10: change etb_drvdata " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 6/9] coresight-funnel: change funnel_drvdata " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 7/9] coresight-replicator: change replicator_drvdata " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 8/9] coresight-tmc: change tmc_drvdata " Yeoreum Yun
2024-12-20 10:45 ` [PATCH v4 9/9] coresight/ultrasoc: change smb_drv_data " Yeoreum Yun
2024-12-31 14:44 ` [PATCH v4 0/9] coresight: change some driver' spinlock " Yeo Reum Yun
2025-02-25 10:23 ` Suzuki K Poulose
2025-02-25 13:53 ` Yeo Reum Yun
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