blob: ba3882ca3e4883a8cd8524e84105b0c364636eb0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Kernel module for testing dynamic_debug
*
* Authors:
* Jim Cromie <jim.cromie@gmail.com>
*/
#define pr_fmt(fmt) "test_dd: " fmt
#include <linux/module.h>
static void do_prints(void); /* device under test */
/* run tests by reading or writing sysfs node */
static int param_set_do_prints(const char *instr, const struct kernel_param *kp)
{
do_prints();
return 0;
}
static int param_get_do_prints(char *buffer, const struct kernel_param *kp)
{
do_prints();
return scnprintf(buffer, PAGE_SIZE, "did do_prints\n");
}
static const struct kernel_param_ops param_ops_do_prints = {
.set = param_set_do_prints,
.get = param_get_do_prints,
};
module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600);
static void do_alpha(void)
{
pr_debug("do alpha\n");
}
static void do_beta(void)
{
pr_debug("do beta\n");
}
static void do_prints(void)
{
do_alpha();
do_beta();
}
static int __init test_dynamic_debug_init(void)
{
pr_debug("init start\n");
do_prints();
pr_debug("init done\n");
return 0;
}
static void __exit test_dynamic_debug_exit(void)
{
pr_debug("exiting\n");
}
module_init(test_dynamic_debug_init);
module_exit(test_dynamic_debug_exit);
MODULE_AUTHOR("Jim Cromie <jim.cromie@gmail.com>");
MODULE_LICENSE("GPL");
|
