diff options
Diffstat (limited to 'samples/markers/probe-example.c')
-rw-r--r-- | samples/markers/probe-example.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/samples/markers/probe-example.c b/samples/markers/probe-example.c deleted file mode 100644 index 2dfb3b32937e..000000000000 --- a/samples/markers/probe-example.c +++ /dev/null | |||
@@ -1,92 +0,0 @@ | |||
1 | /* probe-example.c | ||
2 | * | ||
3 | * Connects two functions to marker call sites. | ||
4 | * | ||
5 | * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | ||
6 | * | ||
7 | * This file is released under the GPLv2. | ||
8 | * See the file COPYING for more details. | ||
9 | */ | ||
10 | |||
11 | #include <linux/sched.h> | ||
12 | #include <linux/kernel.h> | ||
13 | #include <linux/module.h> | ||
14 | #include <linux/marker.h> | ||
15 | #include <asm/atomic.h> | ||
16 | |||
17 | struct probe_data { | ||
18 | const char *name; | ||
19 | const char *format; | ||
20 | marker_probe_func *probe_func; | ||
21 | }; | ||
22 | |||
23 | void probe_subsystem_event(void *probe_data, void *call_data, | ||
24 | const char *format, va_list *args) | ||
25 | { | ||
26 | /* Declare args */ | ||
27 | unsigned int value; | ||
28 | const char *mystr; | ||
29 | |||
30 | /* Assign args */ | ||
31 | value = va_arg(*args, typeof(value)); | ||
32 | mystr = va_arg(*args, typeof(mystr)); | ||
33 | |||
34 | /* Call printk */ | ||
35 | printk(KERN_INFO "Value %u, string %s\n", value, mystr); | ||
36 | |||
37 | /* or count, check rights, serialize data in a buffer */ | ||
38 | } | ||
39 | |||
40 | atomic_t eventb_count = ATOMIC_INIT(0); | ||
41 | |||
42 | void probe_subsystem_eventb(void *probe_data, void *call_data, | ||
43 | const char *format, va_list *args) | ||
44 | { | ||
45 | /* Increment counter */ | ||
46 | atomic_inc(&eventb_count); | ||
47 | } | ||
48 | |||
49 | static struct probe_data probe_array[] = | ||
50 | { | ||
51 | { .name = "subsystem_event", | ||
52 | .format = "integer %d string %s", | ||
53 | .probe_func = probe_subsystem_event }, | ||
54 | { .name = "subsystem_eventb", | ||
55 | .format = MARK_NOARGS, | ||
56 | .probe_func = probe_subsystem_eventb }, | ||
57 | }; | ||
58 | |||
59 | static int __init probe_init(void) | ||
60 | { | ||
61 | int result; | ||
62 | int i; | ||
63 | |||
64 | for (i = 0; i < ARRAY_SIZE(probe_array); i++) { | ||
65 | result = marker_probe_register(probe_array[i].name, | ||
66 | probe_array[i].format, | ||
67 | probe_array[i].probe_func, &probe_array[i]); | ||
68 | if (result) | ||
69 | printk(KERN_INFO "Unable to register probe %s\n", | ||
70 | probe_array[i].name); | ||
71 | } | ||
72 | return 0; | ||
73 | } | ||
74 | |||
75 | static void __exit probe_fini(void) | ||
76 | { | ||
77 | int i; | ||
78 | |||
79 | for (i = 0; i < ARRAY_SIZE(probe_array); i++) | ||
80 | marker_probe_unregister(probe_array[i].name, | ||
81 | probe_array[i].probe_func, &probe_array[i]); | ||
82 | printk(KERN_INFO "Number of event b : %u\n", | ||
83 | atomic_read(&eventb_count)); | ||
84 | marker_synchronize_unregister(); | ||
85 | } | ||
86 | |||
87 | module_init(probe_init); | ||
88 | module_exit(probe_fini); | ||
89 | |||
90 | MODULE_LICENSE("GPL"); | ||
91 | MODULE_AUTHOR("Mathieu Desnoyers"); | ||
92 | MODULE_DESCRIPTION("SUBSYSTEM Probe"); | ||