函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rcu\srcutree.c Create Date:2022-07-27 11:18:49
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Return true if the number of pre-existing readers is determined to* be zero.

函数原型：static bool srcu_readers_active_idx_check(struct srcu_struct *ssp, int idx)

返回类型：bool

参数：

类型参数名称
struct srcu_struct *ssp
intidx
285  unlocks等于Returns approximate total of the readers' ->srcu_unlock_count[] values* for the rank of per-CPU counters specified by idx.
298  smp_mb()
321  返回:Returns approximate total of the readers' ->srcu_lock_count[] values* for the rank of per-CPU counters specified by idx.恒等于unlocks
调用者
名称描述
try_check_zeroWait until all readers counted by array index idx complete, but* loop an additional time if there is an expedited grace period pending.* The caller must ensure that ->srcu_idx is not changed while checking.