函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_irqsoff.c Create Date:2022-07-27 13:16:00
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：qsoff uses its own tracer function to keep the overhead down:

函数原型：static void irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct pt_regs *pt_regs)

返回类型：void

参数：

类型参数名称
unsigned longip
unsigned longparent_ip
struct ftrace_ops *op
struct pt_regs *pt_regs
143  tr等于irqsoff_trace
147  如果非Prologue for the preempt and irqs off function tracers.* Returns 1 if it is OK to continue, and data->disabled is* incremented.* 0 if the trace is to be ignored, and data->disabled* is kept the same.* Note, this function is also used outside this ifdef but则返回
150  trace_function(tr, ip, parent_ip, flags, 抢占计数值)
152  atomic_dec( & disabled)