2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef _ASM_UACCESS_H_
30 #define _ASM_UACCESS_H_
32 #define get_user(_x, _p) -copyin((_p), &(_x), sizeof(*(_p)))
35 copy_to_user(void *to, const void *from, unsigned long n)
37 if (copyout(from, to, n) != 0)
43 copy_from_user(void *to, const void *from, unsigned long n)
45 if (copyin(from, to, n) != 0)
51 __copy_to_user(void *to, const void *from, unsigned len)
53 if (copyout(from, to, len))
58 static inline unsigned long
59 __copy_from_user(void *to, const void *from, unsigned len)
61 if (copyin(from, to, len))
67 __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size)
69 if (copyin_nofault(src, dst, size))
75 __copy_to_user_inatomic(void __user *to, const void *from, unsigned n)
77 return (copyout_nofault(from, to, n) != 0 ? n : 0);
80 static inline unsigned long
81 __copy_from_user_inatomic_nocache(void *to, const void __user *from,
85 * XXXKIB. Equivalent Linux function is implemented using
86 * MOVNTI for aligned moves. For unaligned head and tail,
87 * normal move is performed. As such, it is not incorrect, if
88 * only somewhat slower, to use normal copyin. All uses
89 * except shmem_pwrite_fast() have the destination mapped WC.
91 return ((copyin_nofault(__DECONST(void *, from), to, n) != 0 ? n : 0));
94 #define __put_user(value, uptr) \
96 __typeof(*(uptr)) __tmpval = (value); \
97 __copy_to_user_inatomic((uptr), &__tmpval, sizeof(__tmpval)); \
100 #define put_user(_x, _p) __put_user(_x, _p)
102 #endif /* _ASM_UACCESS_H_ */