thp: madvise(MADV_NOHUGEPAGE)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / input / input-compat.c
blob1accb89ae66f29430065ad2bac1562871a86a53e
1 /*
2 * 32bit compatibility wrappers for the input subsystem.
4 * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
11 #include <asm/uaccess.h>
12 #include "input-compat.h"
14 #ifdef CONFIG_COMPAT
16 int input_event_from_user(const char __user *buffer,
17 struct input_event *event)
19 if (INPUT_COMPAT_TEST) {
20 struct input_event_compat compat_event;
22 if (copy_from_user(&compat_event, buffer,
23 sizeof(struct input_event_compat)))
24 return -EFAULT;
26 event->time.tv_sec = compat_event.time.tv_sec;
27 event->time.tv_usec = compat_event.time.tv_usec;
28 event->type = compat_event.type;
29 event->code = compat_event.code;
30 event->value = compat_event.value;
32 } else {
33 if (copy_from_user(event, buffer, sizeof(struct input_event)))
34 return -EFAULT;
37 return 0;
40 int input_event_to_user(char __user *buffer,
41 const struct input_event *event)
43 if (INPUT_COMPAT_TEST) {
44 struct input_event_compat compat_event;
46 compat_event.time.tv_sec = event->time.tv_sec;
47 compat_event.time.tv_usec = event->time.tv_usec;
48 compat_event.type = event->type;
49 compat_event.code = event->code;
50 compat_event.value = event->value;
52 if (copy_to_user(buffer, &compat_event,
53 sizeof(struct input_event_compat)))
54 return -EFAULT;
56 } else {
57 if (copy_to_user(buffer, event, sizeof(struct input_event)))
58 return -EFAULT;
61 return 0;
64 int input_ff_effect_from_user(const char __user *buffer, size_t size,
65 struct ff_effect *effect)
67 if (INPUT_COMPAT_TEST) {
68 struct ff_effect_compat *compat_effect;
70 if (size != sizeof(struct ff_effect_compat))
71 return -EINVAL;
74 * It so happens that the pointer which needs to be changed
75 * is the last field in the structure, so we can retrieve the
76 * whole thing and replace just the pointer.
78 compat_effect = (struct ff_effect_compat *)effect;
80 if (copy_from_user(compat_effect, buffer,
81 sizeof(struct ff_effect_compat)))
82 return -EFAULT;
84 if (compat_effect->type == FF_PERIODIC &&
85 compat_effect->u.periodic.waveform == FF_CUSTOM)
86 effect->u.periodic.custom_data =
87 compat_ptr(compat_effect->u.periodic.custom_data);
88 } else {
89 if (size != sizeof(struct ff_effect))
90 return -EINVAL;
92 if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
93 return -EFAULT;
96 return 0;
99 #else
101 int input_event_from_user(const char __user *buffer,
102 struct input_event *event)
104 if (copy_from_user(event, buffer, sizeof(struct input_event)))
105 return -EFAULT;
107 return 0;
110 int input_event_to_user(char __user *buffer,
111 const struct input_event *event)
113 if (copy_to_user(buffer, event, sizeof(struct input_event)))
114 return -EFAULT;
116 return 0;
119 int input_ff_effect_from_user(const char __user *buffer, size_t size,
120 struct ff_effect *effect)
122 if (size != sizeof(struct ff_effect))
123 return -EINVAL;
125 if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
126 return -EFAULT;
128 return 0;
131 #endif /* CONFIG_COMPAT */
133 EXPORT_SYMBOL_GPL(input_event_from_user);
134 EXPORT_SYMBOL_GPL(input_event_to_user);
135 EXPORT_SYMBOL_GPL(input_ff_effect_from_user);