函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\sbitmap.c Create Date:2022-07-27 08:21:47
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：sbq_wake_ptr

函数原型：static struct sbq_wait_state *sbq_wake_ptr(struct sbitmap_queue *sbq)

返回类型：struct sbq_wait_state

参数：

类型参数名称
struct sbitmap_queue *sbq
492  如果非atomic_read( & @ws_active: count of currently active ws waitqueues)则返回:NULL
495  wake_index等于atomic_read( & @wake_index: Next wait queue in @ws to wake up.)
496  以i小于SBQ_WAIT_QUEUES循环
497  ws等于@ws: Wait queues.[wake_index]
499  如果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_则
500  如果wake_index不等于atomic_read( & @wake_index: Next wait queue in @ws to wake up.)则atomic_set( & @wake_index: Next wait queue in @ws to wake up., wake_index)
502  返回:ws
505  wake_index等于sbq_index_inc(wake_index)
508  返回:NULL
调用者
名称描述
__sbq_wake_up