ep_free

Name:ep_free

Proto:static void ep_free(struct eventpoll *ep)

Type:void

Parameter:

Type	Parameter	Name
struct eventpoll *	ep

797

If waitqueue_active -- locklessly test for waiters on the queue*@wq_head: the waitqueue to test for waiters* returns true if the wait list is not empty* NOTE: this function is lockless and requires care, incorrect usage _will_ Then ep_poll_safewake( & Wait queue used by file->poll() )

808

mutex_lock( & This mutex is used to serialize ep_free() and eventpoll_release_file().)

813

When rbp cycle

814

epi = rb_entry(rbp, structepitem, rbn)

816

This function unregisters poll callbacks from the associated file* descriptor. Must be called with "mtx" held (or "epmutex" if called from* ep_free).

817

828

mutex_lock( & * 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.)

829

When ((rbp = Same as rb_first(), but O(1) ( & RB tree root used to store monitored fd structs )) != NULL) cycle

830

epi = rb_entry(rbp, structepitem, rbn)

831

Removes a "struct epitem" from the eventpoll RB tree and deallocates* all the associated resources. Must be called with "mtx" held.

832

834

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.

836

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.

837

mutex_destroy( & * 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.)

838

free_uid( The user that created the eventpoll descriptor )

839

wakeup_source_unregister( wakeup_source used when ep_scan_ready_list is running )

840

**Caller**
Name	Describe
ep_eventpoll_release
do_epoll_create	Open an eventpoll file descriptor.

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