task_work_cancel

函数名称：ask_work_cancel - cancel a pending work added by task_work_add()*@task: the task which should execute the work*@func: identifies the work to remove* Find the last queued pending work with ->func == @func and remove* it from queue.* RETURNS:

函数原型：struct callback_head *task_work_cancel(struct task_struct *task, task_work_func_t func)

返回类型：struct callback_head

参数：

类型	参数	名称
struct task_struct *	task
task_work_func_t	func

pprev等于回调队列

如果此条件成立可能性大(为编译器优化)(!回调队列)则返回:NULL

raw_spin_lock_irqsave( & Protection of the PI data structures: , flags)

当work等于READ_ONCE( * pprev)循环

如果func不等于func则pprev等于next

否则如果cmpxchg(pprev, work, next)恒等于work则退出

raw_spin_unlock_irqrestore( & Protection of the PI data structures: , flags)

返回:work

**调用者**
名称	描述
irq_thread	Interrupt handler thread
keyctl_session_to_parent	Attempt to install the calling process's session keyring on the process's* parent process.* The keyring must exist and must grant the caller LINK permission, and the* parent process must be single-threaded and must have the same effective

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