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 13:01:04
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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函数名称：d_buffer_empty - is the ring buffer empty?*@buffer: The ring buffer to test

函数原型：bool ring_buffer_empty(struct ring_buffer *buffer)

返回类型：bool

参数：

类型参数名称
struct ring_buffer *buffer
4460  for_each_buffer_cpu(buffer, cpu)
4461  cpu_buffer等于buffers[cpu]
4462  local_irq_save(flags)
4463  dolock等于rb_reader_lock(cpu_buffer)
4464  ret等于rb_per_cpu_empty(cpu_buffer)
4465  rb_reader_unlock(cpu_buffer, dolock)
4466  local_irq_restore(flags)
4468  如果非ret则返回:false
4472  返回:true
调用者
名称描述
ring_buffer_waitg_buffer_wait - wait for input to the ring buffer*@buffer: buffer to wait on*@cpu: the cpu buffer to wait on*@full: wait until a full page is available, if @cpu != RING_BUFFER_ALL_CPUS* If @cpu == RING_BUFFER_ALL_CPUS then the task will wake up as soon
ring_buffer_poll_waitg_buffer_poll_wait - poll on buffer input*@buffer: buffer to wait on*@cpu: the cpu buffer to wait on*@filp: the file descriptor*@poll_table: The poll descriptor* If @cpu == RING_BUFFER_ALL_CPUS then the task will wake up as soon