tracing/events: don't say hi when loading the trace event sample
[linux-2.6.git] / samples / trace_events / trace-events-sample.c
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);
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");