atomic64

函数名称：atomic64_sub

函数原型：static inline void atomic64_sub(s64 i, atomic64_t *v)

返回类型：void

参数：

类型	参数	名称
s64	i
atomic64_t *	v

**调用者**
名称	描述
perf_mmap_close	A buffer can be mmap()ed multiple times; either directly through the same* event, or through other events by use of perf_event_set_output().* In order to undo the VM accounting done by perf_mmap() we need to destroy
blkcg_scale_delay	Scale the accumulated delay based on how long it has been since we updated* the delay. We only call this when we are adding delay, in case it's been a* while since we added delay, and when we are checking to see if we need to

函数逻辑报告