trace_preempt_off  700 include/linux/ftrace.h   extern void trace_preempt_off(unsigned long a0, unsigned long a1);
trace_preempt_off 3767 kernel/sched/core.c 		trace_preempt_off(CALLER_ADDR0, ip);
trace_preempt_off  136 kernel/softirq.c 		trace_preempt_off(CALLER_ADDR0, get_lock_parent_ip());