函数逻辑报告

函数名称：race_clock(): 'between' trace clock. Not completely serialized,* but not completely incorrect when crossing CPUs either.* This is based on cpu_clock(), which will allow at most ~1 jiffy of* jitter between CPUs. So it's a pretty scalable clock, but there

函数原型：u64 notrace trace_clock(void)

返回类型：u64

参数：无