Commit | Line | Data |
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cfb1b555 CO |
1 | /* |
2 | * drivers/s390/s390_rdev.c | |
3 | * s390 root device | |
cfb1b555 CO |
4 | * |
5 | * Copyright (C) 2002, 2005 IBM Deutschland Entwicklung GmbH, | |
6 | * IBM Corporation | |
4ce3b30c | 7 | * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) |
cfb1b555 CO |
8 | * Carsten Otte (cotte@de.ibm.com) |
9 | */ | |
10 | ||
11 | #include <linux/slab.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/device.h> | |
14 | #include <asm/s390_rdev.h> | |
15 | ||
16 | static void | |
17 | s390_root_dev_release(struct device *dev) | |
18 | { | |
19 | kfree(dev); | |
20 | } | |
21 | ||
22 | struct device * | |
23 | s390_root_dev_register(const char *name) | |
24 | { | |
25 | struct device *dev; | |
26 | int ret; | |
27 | ||
28 | if (!strlen(name)) | |
29 | return ERR_PTR(-EINVAL); | |
88abaab4 | 30 | dev = kzalloc(sizeof(struct device), GFP_KERNEL); |
cfb1b555 CO |
31 | if (!dev) |
32 | return ERR_PTR(-ENOMEM); | |
cfb1b555 CO |
33 | strncpy(dev->bus_id, name, min(strlen(name), (size_t)BUS_ID_SIZE)); |
34 | dev->release = s390_root_dev_release; | |
35 | ret = device_register(dev); | |
36 | if (ret) { | |
37 | kfree(dev); | |
38 | return ERR_PTR(ret); | |
39 | } | |
40 | return dev; | |
41 | } | |
42 | ||
43 | void | |
44 | s390_root_dev_unregister(struct device *dev) | |
45 | { | |
46 | if (dev) | |
47 | device_unregister(dev); | |
48 | } | |
49 | ||
50 | EXPORT_SYMBOL(s390_root_dev_register); | |
51 | EXPORT_SYMBOL(s390_root_dev_unregister); |