are already protected inside rcu_irq_enter/rcu_irq_exit() but
preemption or signal handling on irq exit still need to be protected.
+config HAVE_VIRT_CPU_ACCOUNTING
+ bool
+
+config HAVE_IRQ_TIME_ACCOUNTING
+ bool
+ help
+ Archs need to ensure they use a high enough resolution clock to
+ support irq time accounting and then call enable_sched_clock_irqtime().
+
source "kernel/gcov/Kconfig"