函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rcu\sync.c Create Date:2022-07-27 11:18:22
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：rcu_sync_func

函数原型：static void rcu_sync_func(struct callback_head *rhp)

返回类型：void

参数：

类型参数名称
struct callback_head *rhp
75  rsp等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(rhp, structrcu_sync, cb_head)
78  WARN_ON_ONCE(READ_ONCE(gp_state) == GP_IDLE)
79  WARN_ON_ONCE(READ_ONCE(gp_state) == GP_PASSED)
81  spin_lock_irqsave( & rss_lock, flags)
82  如果gp_count则
86  WRITE_ONCE(gp_state, GP_PASSED)
87  wake_up_locked( & gp_wait)
88  否则如果gp_state恒等于GP_REPLAY则
93  WRITE_ONCE(gp_state, GP_EXIT)
94  rcu_sync_call(rsp)
95  否则
101  WRITE_ONCE(gp_state, GP_IDLE)
103  spin_unlock_irqrestore( & rss_lock, flags)
调用者
名称描述
rcu_sync_enter_sync_enter() - Force readers onto slowpath*@rsp: Pointer to rcu_sync structure to use for synchronization* This function is used by updaters who need readers to make use of* a slowpath during the update