ep_item_poll

函数名称：Differs from ep_eventpoll_poll() in that internal callers already have* the ep->mtx so we need to start from depth=1, such that mutex_lock_nested()* is correctly annotated.

函数原型：static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, int depth)

返回类型：__poll_t

参数：

类型	参数	名称
const struct epitem *	epi
poll_table *	pt
int	depth

869

_key等于events

870

如果非is_file_epoll(file)则返回:vfs_poll(file, pt)按位与events

873

ep等于 needed for tty driver, and maybe others

874

poll_wait(file, & Wait queue used by file->poll() , pt)

875

locked等于pt且_qproc恒等于ep_ptable_queue_proc

877

返回:p_scan_ready_list - Scans the ready list in a way that makes possible for* the scan code, to call f_op->poll(). Also allows for* O(NumReady) performance.*@ep: Pointer to the epoll private data structure.*@sproc: Pointer to the scan callback.按位与events

**调用者**
名称	描述
ep_read_events_proc
ep_insert	Must be called with "mtx" held.
ep_modify	Modify the interest event mask by dropping an event if the new mask* has a match in the current file status. Must be called with "mtx" held.
ep_send_events_proc

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