函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\core.c Create Date:2022-07-27 14:55:06
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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函数名称：perf_event_index

函数原型：static int perf_event_index(struct perf_event *event)

返回类型：int

参数：

类型参数名称
struct perf_event *event
5412  如果state按位与PERF_HES_STOPPED则返回:0
5415  如果state不等于PERF_EVENT_STATE_ACTIVE则返回:0
5418  返回:event_idx(event)
调用者
名称描述
perf_event_update_userpageCallers need to ensure there can be no nesting of this function, otherwise* the seqlock logic goes bad. We can not serialize this because the arch* code calls this from NMI context.