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authorYeoreum Yun <yeoreum.yun@arm.com>2025-03-06 15:11:08 +0300
committerSuzuki K Poulose <suzuki.poulose@arm.com>2025-03-10 13:40:26 +0300
commit982d0a0e08db46865cfbb901444b192c528fc741 (patch)
tree9c3330c1358a81daba9cd2c7d8f31f952e326256 /tools/perf/scripts/python/parallel-perf.py
parent56eb02f0b04fce3b5c4e3224b659e342cc7a8c56 (diff)
downloadlinux-982d0a0e08db46865cfbb901444b192c528fc741.tar.xz
coresight-replicator: change replicator_drvdata spinlock's type to raw_spinlock_t
In coresight-replicator drivers, replicator_drvdata->spinlock can be held during __schedule() by perf_event_task_sched_out()/in(). Since replicator_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 replicator_drvdata->spinlock in coresight-replicator 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> Reviewed-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20250306121110.1647948-8-yeoreum.yun@arm.com
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