69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
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* Copyright (c) 2015 François Tigeot
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_UACCESS_H_
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#define _LINUX_UACCESS_H_
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#include <linux/compiler.h>
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#define __get_user(_x, _p) ({ \
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int __err; \
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__typeof(*(_p)) __x; \
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__err = -copyin((_p), &(__x), sizeof(*(_p))); \
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(_x) = __x; \
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__err; \
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})
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#define __put_user(_x, _p) ({ \
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__typeof(*(_p)) __x = (_x); \
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-copyout(&(__x), (_p), sizeof(*(_p))); \
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})
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#define get_user(_x, _p) -copyin((_p), &(_x), sizeof(*(_p)))
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#define put_user(_x, _p) -copyout(&(_x), (_p), sizeof(*(_p)))
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/*
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* NOTE: The returned value from pagefault_disable() must be stored
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* and passed to pagefault_enable(). Else possible recursion on the
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* state can be lost.
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*/
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static inline int __must_check
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pagefault_disable(void)
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{
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return (vm_fault_disable_pagefaults());
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}
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static inline void
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pagefault_enable(int save)
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{
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vm_fault_enable_pagefaults(save);
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}
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#endif /* _LINUX_UACCESS_H_ */
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