writeback: split writeback_inodes_wb
[linux-2.6/next.git] / samples / trace_events / trace-events-sample.c
blobaabc4e97091126cbf51b43e0e7e47005ab99267b
1 #include <linux/module.h>
2 #include <linux/kthread.h>
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"
14 static void simple_thread_func(int cnt)
16 set_current_state(TASK_INTERRUPTIBLE);
17 schedule_timeout(HZ);
18 trace_foo_bar("hello", cnt);
21 static int simple_thread(void *arg)
23 int cnt = 0;
25 while (!kthread_should_stop())
26 simple_thread_func(cnt++);
28 return 0;
31 static struct task_struct *simple_tsk;
33 static int __init trace_event_init(void)
35 simple_tsk = kthread_run(simple_thread, NULL, "event-sample");
36 if (IS_ERR(simple_tsk))
37 return -1;
39 return 0;
42 static void __exit trace_event_exit(void)
44 kthread_stop(simple_tsk);
47 module_init(trace_event_init);
48 module_exit(trace_event_exit);
50 MODULE_AUTHOR("Steven Rostedt");
51 MODULE_DESCRIPTION("trace-events-sample");
52 MODULE_LICENSE("GPL");