Hi Levi,
On 20/12/2024 10:45, Yeoreum Yun wrote:
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
This doesn't apply cleanly on coresight next branch. Please could you rebase on coresight /next ?
Cheers Suzuki
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}