uaccess.h revision 294825
1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5294825Shselasky * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6289565Shselasky * Copyright (c) 2015 Fran��ois Tigeot 7219820Sjeff * All rights reserved. 8219820Sjeff * 9219820Sjeff * Redistribution and use in source and binary forms, with or without 10219820Sjeff * modification, are permitted provided that the following conditions 11219820Sjeff * are met: 12219820Sjeff * 1. Redistributions of source code must retain the above copyright 13219820Sjeff * notice unmodified, this list of conditions, and the following 14219820Sjeff * disclaimer. 15219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 16219820Sjeff * notice, this list of conditions and the following disclaimer in the 17219820Sjeff * documentation and/or other materials provided with the distribution. 18219820Sjeff * 19219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29289644Shselasky * 30289644Shselasky * $FreeBSD: head/sys/compat/linuxkpi/common/include/linux/uaccess.h 294825 2016-01-26 14:21:30Z hselasky $ 31219820Sjeff */ 32219820Sjeff#ifndef _LINUX_UACCESS_H_ 33219820Sjeff#define _LINUX_UACCESS_H_ 34219820Sjeff 35289593Shselasky#include <linux/compiler.h> 36289593Shselasky 37294825Shselasky#define __get_user(_x, _p) ({ \ 38294825Shselasky int __err; \ 39294825Shselasky __typeof(*(_p)) __x; \ 40294825Shselasky __err = -copyin((_p), &(__x), sizeof(*(_p))); \ 41294825Shselasky (_x) = __x; \ 42294825Shselasky __err; \ 43294825Shselasky}) 44294825Shselasky#define __put_user(_x, _p) ({ \ 45294825Shselasky __typeof(*(_p)) __x = (_x); \ 46294825Shselasky -copyout(&(__x), (_p), sizeof(*(_p))); \ 47294825Shselasky}) 48219820Sjeff#define get_user(_x, _p) -copyin((_p), &(_x), sizeof(*(_p))) 49219820Sjeff#define put_user(_x, _p) -copyout(&(_x), (_p), sizeof(*(_p))) 50219820Sjeff 51289593Shselasky/* 52289593Shselasky * NOTE: The returned value from pagefault_disable() must be stored 53289593Shselasky * and passed to pagefault_enable(). Else possible recursion on the 54289593Shselasky * state can be lost. 55289593Shselasky */ 56289593Shselaskystatic inline int __must_check 57289593Shselaskypagefault_disable(void) 58289565Shselasky{ 59289593Shselasky return (vm_fault_disable_pagefaults()); 60289565Shselasky} 61289565Shselasky 62289593Shselaskystatic inline void 63289593Shselaskypagefault_enable(int save) 64289565Shselasky{ 65289593Shselasky vm_fault_enable_pagefaults(save); 66289565Shselasky} 67289565Shselasky 68219820Sjeff#endif /* _LINUX_UACCESS_H_ */ 69