this_cpu_ptr() call causes backtrace with CONFIG_DEBUG_PREEMPT=y because it required non-preemptive mode.
Stack Trace: arc_unwind_core+0xe8/0x118 dump_stack_lvl+0x2c/0x40 check_preemption_disabled+0xb4/0xb8 arc_pmu_device_probe+0x336/0x3c8 platform_probe+0x30/0x80 really_probe.part.0+0x8c/0x248 driver_probe_device+0x86/0x1e8 __driver_attach+0x8a/0x144 bus_for_each_dev+0x38/0x64 bus_add_driver+0x112/0x178 driver_register+0x4c/0xdc do_one_initcall+0x30/0x110 kernel_init_freeable+0x14a/0x1b0 Suggested fix turns off preemption for the routine call. Signed-off-by: Nikolay Agishev <agis...@synopsys.com> --- arch/arc/kernel/perf_event.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c index adff957962da..10bbdc2dab01 100644 --- a/arch/arc/kernel/perf_event.c +++ b/arch/arc/kernel/perf_event.c @@ -806,10 +806,14 @@ static int arc_pmu_device_probe(struct platform_device *pdev) arc_pmu->irq = irq; + get_cpu_ptr(&arc_pmu_cpu); + /* intc map function ensures irq_set_percpu_devid() called */ ret = request_percpu_irq(irq, arc_pmu_intr, "ARC perf counters", this_cpu_ptr(&arc_pmu_cpu)); + put_cpu_ptr(&arc_pmu_cpu); + if (!ret) on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1); else -- 2.35.1 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc