Enable trace events for preempt and irq disable/enable

modulename: trace_irqsoff.ko

configname: CONFIG_PREEMPTIRQ_EVENTS

Linux Kernel Configuration
└─>Tracers
└─>Enable trace events for preempt and irq disable/enable
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Enable tracing of disable and enable events for preemption and irqs.
For tracing preempt disable/enable events, DEBUG_PREEMPT must be
enabled. For tracing irq disable/enable events, PROVE_LOCKING must
be disabled.

source code:
kernel/trace/trace_irqsoff.c