edac_stub.c
2 KB
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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
* common EDAC components that must be in kernel
*
* Author: Dave Jiang <djiang@mvista.com>
*
* 2007 (c) MontaVista Software, Inc.
* 2010 (c) Advanced Micro Devices Inc.
* Borislav Petkov <borislav.petkov@amd.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
*/
#include <linux/module.h>
#include <linux/edac.h>
#include <asm/atomic.h>
#include <asm/edac.h>
int edac_op_state = EDAC_OPSTATE_INVAL;
EXPORT_SYMBOL_GPL(edac_op_state);
atomic_t edac_handlers = ATOMIC_INIT(0);
EXPORT_SYMBOL_GPL(edac_handlers);
int edac_err_assert = 0;
EXPORT_SYMBOL_GPL(edac_err_assert);
static atomic_t edac_class_valid = ATOMIC_INIT(0);
/*
* called to determine if there is an EDAC driver interested in
* knowing an event (such as NMI) occurred
*/
int edac_handler_set(void)
{
if (edac_op_state == EDAC_OPSTATE_POLL)
return 0;
return atomic_read(&edac_handlers);
}
EXPORT_SYMBOL_GPL(edac_handler_set);
/*
* handler for NMI type of interrupts to assert error
*/
void edac_atomic_assert_error(void)
{
edac_err_assert++;
}
EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
/*
* sysfs object: /sys/devices/system/edac
* need to export to other files
*/
struct sysdev_class edac_class = {
.name = "edac",
};
EXPORT_SYMBOL_GPL(edac_class);
/* return pointer to the 'edac' node in sysfs */
struct sysdev_class *edac_get_sysfs_class(void)
{
int err = 0;
if (atomic_read(&edac_class_valid))
goto out;
/* create the /sys/devices/system/edac directory */
err = sysdev_class_register(&edac_class);
if (err) {
printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
return NULL;
}
out:
atomic_inc(&edac_class_valid);
return &edac_class;
}
EXPORT_SYMBOL_GPL(edac_get_sysfs_class);
void edac_put_sysfs_class(void)
{
/* last user unregisters it */
if (atomic_dec_and_test(&edac_class_valid))
sysdev_class_unregister(&edac_class);
}
EXPORT_SYMBOL_GPL(edac_put_sysfs_class);