free_ioctx

函数名称：When this function runs, the kioctx has been removed from the "hash table"* and ctx->users has dropped to 0, so we know no more kiocbs can be submitted -* now it's safe to cancel any that need to be.

函数原型：static void free_ioctx_users(struct percpu_ref *ref)

返回类型：void

参数：

类型	参数	名称
struct percpu_ref *	ref

615

ctx等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(ref, structkioctx, users)

618

spin_lock_irq( & ctx_lock)

620

当非链表为空循环

621

req等于list_first_entry - get the first element from a list*@ptr: the list head to take the element from.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.* Note, that list is expected to be not empty.( & used for cancellation , structaio_kiocb, ki_list)

623

ki_cancel( & rw)

624

删除链表项并重新初始化

627

spin_unlock_irq( & ctx_lock)

629

percpu_ref_kill - drop the initial ref*@ref: percpu_ref to kill* Must be used to drop the initial ref on a percpu refcount; must be called* precisely once before shutdown.* Switches @ref into atomic mode before gathering up the percpu counters

630

percpu计数引用减

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告