函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_mmiotrace.c Create Date:2022-07-27 13:18:56
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：count_overruns

函数原型：static unsigned long count_overruns(struct trace_iterator *iter)

返回类型：unsigned long

参数：

类型参数名称
struct trace_iterator *iter
124  cnt等于atomic_xchg( & dropped_count, 0)
125  over等于g_buffer_overruns - get the number of overruns in buffer*@buffer: The ring buffer* Returns the total number of overruns in the ring buffer* (all CPU entries)
127  如果over大于prev_overruns则cnt加等于over减prev_overruns
129  prev_overruns等于over
130  返回:cnt
调用者
名称描述
mmio_read