Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\ring_buffer.c Create Date:2022-07-28 11:55:32
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:d_buffer_empty - is the ring buffer empty?*@buffer: The ring buffer to test

Proto:bool ring_buffer_empty(struct ring_buffer *buffer)

Type:bool

Parameter:

TypeParameterName
struct ring_buffer *buffer
4460  for_each_buffer_cpu(buffer, cpu)
4461  cpu_buffer = buffers[cpu]
4462  local_irq_save(flags)
4463  dolock = rb_reader_lock(cpu_buffer)
4464  ret = rb_per_cpu_empty(cpu_buffer)
4465  rb_reader_unlock(cpu_buffer, dolock)
4466  local_irq_restore(flags)
4468  If Not ret Then Return false
4472  Return true
Caller
NameDescribe
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