ALSA: fix hda AZX_DCAPS_NO_TCSEL quirk check in driver_caps
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / edac / edac_stub.c
blobaab970760b755b4a5e3f848829bcbd74b3122a37
1 /*
2 * common EDAC components that must be in kernel
4 * Author: Dave Jiang <djiang@mvista.com>
6 * 2007 (c) MontaVista Software, Inc.
7 * 2010 (c) Advanced Micro Devices Inc.
8 * Borislav Petkov <borislav.petkov@amd.com>
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2. This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
15 #include <linux/module.h>
16 #include <linux/edac.h>
17 #include <asm/atomic.h>
18 #include <asm/edac.h>
20 int edac_op_state = EDAC_OPSTATE_INVAL;
21 EXPORT_SYMBOL_GPL(edac_op_state);
23 atomic_t edac_handlers = ATOMIC_INIT(0);
24 EXPORT_SYMBOL_GPL(edac_handlers);
26 int edac_err_assert = 0;
27 EXPORT_SYMBOL_GPL(edac_err_assert);
29 static atomic_t edac_class_valid = ATOMIC_INIT(0);
32 * called to determine if there is an EDAC driver interested in
33 * knowing an event (such as NMI) occurred
35 int edac_handler_set(void)
37 if (edac_op_state == EDAC_OPSTATE_POLL)
38 return 0;
40 return atomic_read(&edac_handlers);
42 EXPORT_SYMBOL_GPL(edac_handler_set);
45 * handler for NMI type of interrupts to assert error
47 void edac_atomic_assert_error(void)
49 edac_err_assert++;
51 EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
54 * sysfs object: /sys/devices/system/edac
55 * need to export to other files
57 struct sysdev_class edac_class = {
58 .name = "edac",
60 EXPORT_SYMBOL_GPL(edac_class);
62 /* return pointer to the 'edac' node in sysfs */
63 struct sysdev_class *edac_get_sysfs_class(void)
65 int err = 0;
67 if (atomic_read(&edac_class_valid))
68 goto out;
70 /* create the /sys/devices/system/edac directory */
71 err = sysdev_class_register(&edac_class);
72 if (err) {
73 printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
74 return NULL;
77 out:
78 atomic_inc(&edac_class_valid);
79 return &edac_class;
81 EXPORT_SYMBOL_GPL(edac_get_sysfs_class);
83 void edac_put_sysfs_class(void)
85 /* last user unregisters it */
86 if (atomic_dec_and_test(&edac_class_valid))
87 sysdev_class_unregister(&edac_class);
89 EXPORT_SYMBOL_GPL(edac_put_sysfs_class);