函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\sched\wait_bit.c Create Date:2022-07-27 10:41:33
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__wait_on_bit_lock

函数原型：int __sched __wait_on_bit_lock(struct wait_queue_head *wq_head, struct wait_bit_queue_entry *wbq_entry, wait_bit_action_f *action, unsigned mode)

返回类型：int

参数：

类型参数名称
struct wait_queue_head *wq_head
struct wait_bit_queue_entry *wbq_entry
wait_bit_action_f *action
unsignedmode
85  ret等于0
87  循环
88  prepare_to_wait_exclusive(wq_head, & wq_entry, mode)
89  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则
90  ret等于action( & key, mode)
97  如果ret则sh_wait - clean up after waiting in a queue*@wq_head: waitqueue waited on*@wq_entry: wait descriptor* Sets current thread back to running state and removes* the wait descriptor from the given waitqueue if still* queued.
100  如果非st_and_set_bit - Set a bit and return its old value*@nr: Bit to set*@addr: Address to count from* This is an atomic fully-ordered operation (implied full memory barrier).则
101  如果非ret则sh_wait - clean up after waiting in a queue*@wq_head: waitqueue waited on*@wq_entry: wait descriptor* Sets current thread back to running state and removes* the wait descriptor from the given waitqueue if still* queued.
103  返回:0
104  否则如果ret则
105  返回:ret
调用者
名称描述
out_of_line_wait_on_bit_lock