函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\ring_buffer.c Create Date:2022-07-27 13:00:11
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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函数名称：rb_per_cpu_empty

函数原型：static bool rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)

返回类型：bool

参数：

类型参数名称
struct ring_buffer_per_cpu *cpu_buffer
3173  reader等于reader_page
3174  head等于rb_set_head_page(cpu_buffer)
3175  commit等于committed pages
3178  如果此条件成立可能性小(为编译器优化)(!head)则返回:true
3181  返回:dex for next read 恒等于rb_page_commit(reader)且commit恒等于reader或commit恒等于head且dex for next read 恒等于rb_page_commit(commit)的值
调用者
名称描述
rb_iter_peek
ring_buffer_emptyd_buffer_empty - is the ring buffer empty?*@buffer: The ring buffer to test
ring_buffer_empty_cpug_buffer_empty_cpu - is a cpu buffer of a ring buffer empty?*@buffer: The ring buffer*@cpu: The CPU buffer to test