[GitHub/mt8127/android_kernel_alcatel_ttab.git] / samples / trace_events / trace-events-sample.c

#include <linux/module.h>
#include <linux/kthread.h>

/*
 * Any file that uses trace points, must include the header.
 * But only one file, must include the header by defining
 * CREATE_TRACE_POINTS first.  This will make the C code that
 * creates the handles for the trace points.
 */
#define CREATE_TRACE_POINTS
#include "trace-events-sample.h"


static void simple_thread_func(int cnt)
{
	set_current_state(TASK_INTERRUPTIBLE);
	schedule_timeout(HZ);
	trace_foo_bar("hello", cnt);
}

static int simple_thread(void *arg)
{
	int cnt = 0;

	while (!kthread_should_stop())
		simple_thread_func(cnt++);

	return 0;
}

static struct task_struct *simple_tsk;

static int __init trace_event_init(void)
{
	simple_tsk = kthread_run(simple_thread, NULL, "event-sample");
	if (IS_ERR(simple_tsk))
		return -1;

	return 0;
}

static void __exit trace_event_exit(void)
{
	kthread_stop(simple_tsk);
}

module_init(trace_event_init);
module_exit(trace_event_exit);

MODULE_AUTHOR("Steven Rostedt");
MODULE_DESCRIPTION("trace-events-sample");
MODULE_LICENSE("GPL");
Commit	Line	Data
9cfe06f8 SR	1	#include <linux/module.h>
	2	#include <linux/kthread.h>
	3
	4	/*
	5	* Any file that uses trace points, must include the header.
	6	* But only one file, must include the header by defining
	7	* CREATE_TRACE_POINTS first. This will make the C code that
	8	* creates the handles for the trace points.
	9	*/
	10	#define CREATE_TRACE_POINTS
	11	#include "trace-events-sample.h"
	12
	13
	14	static void simple_thread_func(int cnt)
	15	{
	16	set_current_state(TASK_INTERRUPTIBLE);
	17	schedule_timeout(HZ);
	18	trace_foo_bar("hello", cnt);
9cfe06f8 SR	19	}
	20
	21	static int simple_thread(void *arg)
	22	{
	23	int cnt = 0;
	24
	25	while (!kthread_should_stop())
	26	simple_thread_func(cnt++);
	27
	28	return 0;
	29	}
	30
	31	static struct task_struct *simple_tsk;
	32
	33	static int __init trace_event_init(void)
	34	{
	35	simple_tsk = kthread_run(simple_thread, NULL, "event-sample");
	36	if (IS_ERR(simple_tsk))
	37	return -1;
	38
	39	return 0;
	40	}
	41
	42	static void __exit trace_event_exit(void)
	43	{
	44	kthread_stop(simple_tsk);
	45	}
	46
	47	module_init(trace_event_init);
	48	module_exit(trace_event_exit);
	49
	50	MODULE_AUTHOR("Steven Rostedt");
	51	MODULE_DESCRIPTION("trace-events-sample");
	52	MODULE_LICENSE("GPL");