trace_hardirq_exit 42 include/linux/irqflags.h # define trace_hardirq_exit() \ trace_hardirq_exit 62 include/linux/irqflags.h # define trace_hardirq_exit() do { } while (0) trace_hardirq_exit 10 tools/include/linux/irqflags.h # define trace_hardirq_exit() do { } while (0)