Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit_irqson() to perf trace point hook

[Peter Zijlstra]

On Tue, Feb 11, 2020 at 04:59:29AM -0800, Paul E. McKenney wrote:

> However, a quick grep for NMI_MASK didn't show me the NMI_MASK bit
> getting set.  Help?

| #define nmi_enter()						\
| 	do {							\
| 		arch_nmi_enter();				\
| 		printk_nmi_enter();				\
| 		lockdep_off();					\
| 		ftrace_nmi_enter();				\
| 		BUG_ON(in_nmi());				\
| 		preempt_count_add(NMI_OFFSET + HARDIRQ_OFFSET);	\

		^^^^ right there

| 		rcu_nmi_enter();				\
| 		trace_hardirq_enter();				\
| 	} while (0)