函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\eventpoll.c Create Date:2022-07-29 10:50:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：This is called from eventpoll_release() to unlink files from the eventpoll* interface. We need to have this facility to cleanup correctly files that are* closed without being removed from the eventpoll interface.

函数原型：void eventpoll_release_file(struct file *file)

返回类型：void

参数：

类型参数名称
struct file *file
982  mutex_lock( & This mutex is used to serialize ep_free() and eventpoll_release_file().)
984  ep等于The "container" of this item
985  mutex_lock_nested( & * This mutex is used to ensure that files are not removed * while epoll is using them. This is held during the event * collection loop, the file cleanup path, the epoll file exit * code and the ctl operations., 0)
986  Removes a "struct epitem" from the eventpoll RB tree and deallocates* all the associated resources. Must be called with "mtx" held.
987  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
989  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
调用者
名称描述
eventpoll_releaseThis is called from inside fs/file_table.c:__fput() to unlink files* from the eventpoll interface. We need to have this facility to cleanup* correctly files that are closed without being removed from the eventpoll* interface.