tracing_irq_cpu 20 kernel/trace/trace_preemptirq.c static DEFINE_PER_CPU(int, tracing_irq_cpu); tracing_irq_cpu 24 kernel/trace/trace_preemptirq.c if (this_cpu_read(tracing_irq_cpu)) { tracing_irq_cpu 28 kernel/trace/trace_preemptirq.c this_cpu_write(tracing_irq_cpu, 0); tracing_irq_cpu 38 kernel/trace/trace_preemptirq.c if (!this_cpu_read(tracing_irq_cpu)) { tracing_irq_cpu 39 kernel/trace/trace_preemptirq.c this_cpu_write(tracing_irq_cpu, 1); tracing_irq_cpu 52 kernel/trace/trace_preemptirq.c if (this_cpu_read(tracing_irq_cpu)) { tracing_irq_cpu 56 kernel/trace/trace_preemptirq.c this_cpu_write(tracing_irq_cpu, 0); tracing_irq_cpu 66 kernel/trace/trace_preemptirq.c if (!this_cpu_read(tracing_irq_cpu)) { tracing_irq_cpu 67 kernel/trace/trace_preemptirq.c this_cpu_write(tracing_irq_cpu, 1);