>
> +void ipi_cpu_backtrace(struct pt_regs *regs)
> +{
> + int cpu = smp_processor_id();
> +
> + if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
> + printk_nmi_backtrace_this_cpu_begin();
> + pr_warn("FIQ backtrace for cpu %d\n", cpu);
> + if (regs != NULL)
> + show_regs(regs);
> + else
> + dump_stack();
Help more if we could print both register and stack info.
> + printk_nmi_backtrace_this_cpu_end();
> +
> + cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
> + }
> +}
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