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 13:00:45
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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函数名称:rb_reader_lock

函数原型:static inline bool rb_reader_lock(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
4039  如果此条件成立可能性大(为编译器优化)(!in_nmi())则
4040  raw_spin_lock( & serialize readers )
4041  返回:true
4053  如果Define the various spin_lock methods. Note we define these* regardless of whether CONFIG_SMP or CONFIG_PREEMPTION are set. The* various methods are defined as nops in the case they are not* required.( & serialize readers )则返回:true
4057  atomic_inc( & record_disabled)
4058  返回:false
调用者
名称描述
ring_buffer_peekg_buffer_peek - peek at the next event to be read*@buffer: The ring buffer to read*@cpu: The cpu to peak at*@ts: The timestamp counter of this event
ring_buffer_consumeg_buffer_consume - return an event and consume it*@buffer: The ring buffer to get the next event from*@cpu: the cpu to read the buffer from*@ts: a variable to store the timestamp (may be NULL)*@lost_events: a variable to store if events were lost (may be
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