mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 19:56:18 +00:00
213cc06079
Impact: cleanup This patch factors out common code from multiple tracers into a tracing_reset_online_cpus() function and converts the tracers to use it. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
|
|
* ring buffer based function tracer
|
|
*
|
|
* Copyright (C) 2007-2008 Steven Rostedt <srostedt@redhat.com>
|
|
* Copyright (C) 2008 Ingo Molnar <mingo@redhat.com>
|
|
*
|
|
* Based on code from the latency_tracer, that is:
|
|
*
|
|
* Copyright (C) 2004-2006 Ingo Molnar
|
|
* Copyright (C) 2004 William Lee Irwin III
|
|
*/
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/fs.h>
|
|
|
|
#include "trace.h"
|
|
|
|
static void start_function_trace(struct trace_array *tr)
|
|
{
|
|
tr->cpu = get_cpu();
|
|
tracing_reset_online_cpus(tr);
|
|
put_cpu();
|
|
|
|
tracing_start_cmdline_record();
|
|
tracing_start_function_trace();
|
|
}
|
|
|
|
static void stop_function_trace(struct trace_array *tr)
|
|
{
|
|
tracing_stop_function_trace();
|
|
tracing_stop_cmdline_record();
|
|
}
|
|
|
|
static int function_trace_init(struct trace_array *tr)
|
|
{
|
|
start_function_trace(tr);
|
|
return 0;
|
|
}
|
|
|
|
static void function_trace_reset(struct trace_array *tr)
|
|
{
|
|
stop_function_trace(tr);
|
|
}
|
|
|
|
static void function_trace_start(struct trace_array *tr)
|
|
{
|
|
tracing_reset_online_cpus(tr);
|
|
}
|
|
|
|
static struct tracer function_trace __read_mostly =
|
|
{
|
|
.name = "function",
|
|
.init = function_trace_init,
|
|
.reset = function_trace_reset,
|
|
.start = function_trace_start,
|
|
#ifdef CONFIG_FTRACE_SELFTEST
|
|
.selftest = trace_selftest_startup_function,
|
|
#endif
|
|
};
|
|
|
|
static __init int init_function_trace(void)
|
|
{
|
|
return register_tracer(&function_trace);
|
|
}
|
|
|
|
device_initcall(init_function_trace);
|