ftrace_stack_reserve 2802 kernel/trace/trace.c static DEFINE_PER_CPU(int, ftrace_stack_reserve);
ftrace_stack_reserve 2832 kernel/trace/trace.c 	stackidx = __this_cpu_inc_return(ftrace_stack_reserve) - 1;
ftrace_stack_reserve 2873 kernel/trace/trace.c 	__this_cpu_dec(ftrace_stack_reserve);