Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / input-compat.c

diff --git a/kernel/drivers/input/input-compat.c b/kernel/drivers/input/input-compat.c
new file mode 100644 (file)
index 0000000..64ca711
--- /dev/null
+++ b/kernel/drivers/input/input-compat.c
@@ -0,0 +1,136 @@
+/*
+ * 32bit compatibility wrappers for the input subsystem.
+ *
+ * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/export.h>
+#include <asm/uaccess.h>
+#include "input-compat.h"
+
+#ifdef CONFIG_COMPAT
+
+int input_event_from_user(const char __user *buffer,
+                         struct input_event *event)
+{
+       if (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) {
+               struct input_event_compat compat_event;
+
+               if (copy_from_user(&compat_event, buffer,
+                                  sizeof(struct input_event_compat)))
+                       return -EFAULT;
+
+               event->time.tv_sec = compat_event.time.tv_sec;
+               event->time.tv_usec = compat_event.time.tv_usec;
+               event->type = compat_event.type;
+               event->code = compat_event.code;
+               event->value = compat_event.value;
+
+       } else {
+               if (copy_from_user(event, buffer, sizeof(struct input_event)))
+                       return -EFAULT;
+       }
+
+       return 0;
+}
+
+int input_event_to_user(char __user *buffer,
+                       const struct input_event *event)
+{
+       if (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) {
+               struct input_event_compat compat_event;
+
+               compat_event.time.tv_sec = event->time.tv_sec;
+               compat_event.time.tv_usec = event->time.tv_usec;
+               compat_event.type = event->type;
+               compat_event.code = event->code;
+               compat_event.value = event->value;
+
+               if (copy_to_user(buffer, &compat_event,
+                                sizeof(struct input_event_compat)))
+                       return -EFAULT;
+
+       } else {
+               if (copy_to_user(buffer, event, sizeof(struct input_event)))
+                       return -EFAULT;
+       }
+
+       return 0;
+}
+
+int input_ff_effect_from_user(const char __user *buffer, size_t size,
+                             struct ff_effect *effect)
+{
+       if (INPUT_COMPAT_TEST) {
+               struct ff_effect_compat *compat_effect;
+
+               if (size != sizeof(struct ff_effect_compat))
+                       return -EINVAL;
+
+               /*
+                * It so happens that the pointer which needs to be changed
+                * is the last field in the structure, so we can retrieve the
+                * whole thing and replace just the pointer.
+                */
+               compat_effect = (struct ff_effect_compat *)effect;
+
+               if (copy_from_user(compat_effect, buffer,
+                                  sizeof(struct ff_effect_compat)))
+                       return -EFAULT;
+
+               if (compat_effect->type == FF_PERIODIC &&
+                   compat_effect->u.periodic.waveform == FF_CUSTOM)
+                       effect->u.periodic.custom_data =
+                               compat_ptr(compat_effect->u.periodic.custom_data);
+       } else {
+               if (size != sizeof(struct ff_effect))
+                       return -EINVAL;
+
+               if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
+                       return -EFAULT;
+       }
+
+       return 0;
+}
+
+#else
+
+int input_event_from_user(const char __user *buffer,
+                        struct input_event *event)
+{
+       if (copy_from_user(event, buffer, sizeof(struct input_event)))
+               return -EFAULT;
+
+       return 0;
+}
+
+int input_event_to_user(char __user *buffer,
+                       const struct input_event *event)
+{
+       if (copy_to_user(buffer, event, sizeof(struct input_event)))
+               return -EFAULT;
+
+       return 0;
+}
+
+int input_ff_effect_from_user(const char __user *buffer, size_t size,
+                             struct ff_effect *effect)
+{
+       if (size != sizeof(struct ff_effect))
+               return -EINVAL;
+
+       if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
+               return -EFAULT;
+
+       return 0;
+}
+
+#endif /* CONFIG_COMPAT */
+
+EXPORT_SYMBOL_GPL(input_event_from_user);
+EXPORT_SYMBOL_GPL(input_event_to_user);
+EXPORT_SYMBOL_GPL(input_ff_effect_from_user);