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 10:50:52
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：all when ep->mtx cannot be held (ep_poll_callback)

函数原型：static inline void ep_pm_stay_awake_rcu(struct epitem *epi)

返回类型：void

参数：

类型参数名称
struct epitem *epi
643  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
644  ws等于cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().(wakeup_source used when EPOLLWAKEUP is set )
645  如果ws则__pm_stay_awake(ws)
647  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
调用者
名称描述
ep_poll_callbackThis is the callback that is passed to the wait queue wakeup* mechanism