blkcg_parent

函数名称：lkcg_parent - get the parent of a blkcg*@blkcg: blkcg of interest* Return the parent blkcg of @blkcg. Can be called anytime.

函数原型：static inline struct blkcg *blkcg_parent(struct blkcg *blkcg)

返回类型：struct blkcg

参数：

类型	参数	名称
struct blkcg *	blkcg

**调用者**
名称	描述
blkg_create	If @new_blkg is %NULL, this function tries to allocate a new one as* necessary using %GFP_NOWAIT. @new_blkg is always consumed on return.
__blkg_lookup_create	__blkg_lookup_create - lookup blkg, try to create one if not there@blkcg: blkcg of interest@q: request_queue of interest* Lookup blkg for the @blkcg - @q pair. If it doesn't exist, try to* create one
blkg_conf_prep	lkg_conf_prep - parse and prepare for per-blkg config update@blkcg: target block cgroup@pol: target policy@input: input string@ctx: blkg_conf_ctx to be filled* Parse per-blkg config update from @input and initialize @ctx with the* result

函数逻辑报告