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https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
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f930a7a0f4
Enable the input system to be used with a compat ABI with 64-bit time. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#ifndef _INPUT_COMPAT_H
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#define _INPUT_COMPAT_H
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/*
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* 32bit compatibility wrappers for the input subsystem.
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*
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* Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/compiler.h>
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#include <linux/compat.h>
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#include <linux/input.h>
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#ifdef CONFIG_COMPAT
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/* Note to the author of this code: did it ever occur to
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you why the ifdefs are needed? Think about it again. -AK */
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#if defined(CONFIG_X86_64) || defined(CONFIG_TILE)
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# define INPUT_COMPAT_TEST is_compat_task()
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#elif defined(CONFIG_S390)
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# define INPUT_COMPAT_TEST test_thread_flag(TIF_31BIT)
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#elif defined(CONFIG_MIPS)
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# define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR)
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#else
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# define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT)
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#endif
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struct input_event_compat {
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struct compat_timeval time;
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__u16 type;
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__u16 code;
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__s32 value;
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};
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struct ff_periodic_effect_compat {
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__u16 waveform;
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__u16 period;
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__s16 magnitude;
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__s16 offset;
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__u16 phase;
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struct ff_envelope envelope;
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__u32 custom_len;
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compat_uptr_t custom_data;
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};
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struct ff_effect_compat {
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__u16 type;
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__s16 id;
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__u16 direction;
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struct ff_trigger trigger;
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struct ff_replay replay;
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union {
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struct ff_constant_effect constant;
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struct ff_ramp_effect ramp;
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struct ff_periodic_effect_compat periodic;
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struct ff_condition_effect condition[2]; /* One for each axis */
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struct ff_rumble_effect rumble;
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} u;
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};
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static inline size_t input_event_size(void)
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{
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return (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) ?
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sizeof(struct input_event_compat) : sizeof(struct input_event);
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}
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#else
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static inline size_t input_event_size(void)
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{
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return sizeof(struct input_event);
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}
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#endif /* CONFIG_COMPAT */
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int input_event_from_user(const char __user *buffer,
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struct input_event *event);
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int input_event_to_user(char __user *buffer,
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const struct input_event *event);
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int input_ff_effect_from_user(const char __user *buffer, size_t size,
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struct ff_effect *effect);
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#endif /* _INPUT_COMPAT_H */
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