函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace.c Create Date:2022-07-27 13:07:33
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：tracing_resize_ring_buffer

函数原型：static ssize_t tracing_resize_ring_buffer(struct trace_array *tr, unsigned long size, int cpu_id)

返回类型：ssize_t

参数：

类型参数名称
struct trace_array *tr
unsigned longsize
intcpu_id
5648  ret等于size
5650  mutex_lock( & race_types_lock is used to protect the trace_types list.)
5652  如果cpu_id不等于RING_BUFFER_ALL_CPUS则
5654  如果非测试CPU信息则
5655  ret等于负EINVAL
5656  转到:out
5660  ret等于__tracing_resize_ring_buffer(tr, size, cpu_id)
5661  如果ret小于0则ret等于负ENOMEM
5664  out :
5665  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
5667  返回:ret
调用者
名称描述
tracing_entries_write
tracing_free_buffer_release