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