Hi all, Following the report of a preemption-related bug in arm-cci, it turns out there's a fair bit of cleaning up to do in this area. I've started here with the Arm drivers that I'm fairly familiar with - I suspect the hisi/qcom/xgene ones suffer from similar issues, but it's going to take me a while longer to figure them out in detail.
Robin. Robin Murphy (5): perf/arm-cci: Fix CPU hotplug race avoidance cpu/hotplug: Export __cpuhp_state_add_instance_cpuslocked() perf/arm-ccn: Fix CPU hotplug race avoidance cpu/hotplug: Add locked variant of cpuhp_state_add_instance() perf/arm_dsu: Fix CPU hotplug races drivers/perf/arm-cci.c | 22 ++++++++++++---------- drivers/perf/arm-ccn.c | 25 +++++++++++++------------ drivers/perf/arm_dsu_pmu.c | 8 +++++--- include/linux/cpuhotplug.h | 6 ++++++ kernel/cpu.c | 1 + 5 files changed, 37 insertions(+), 25 deletions(-) -- 2.20.1.dirty
