1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
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.
17 *
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.
28 *
29 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/err.h 361163 2020-05-18 08:56:22Z hselasky $
30 */
31#ifndef	_LINUX_ERR_H_
32#define	_LINUX_ERR_H_
33
34#include <sys/types.h>
35
36#include <linux/compiler.h>
37
38#define MAX_ERRNO	4095
39
40#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
41
42static inline void *
43ERR_PTR(long error)
44{
45	return (void *)error;
46}
47
48static inline long
49PTR_ERR(const void *ptr)
50{
51	return (long)ptr;
52}
53
54static inline long
55IS_ERR(const void *ptr)
56{
57	return IS_ERR_VALUE((unsigned long)ptr);
58}
59
60static inline long
61IS_ERR_OR_NULL(const void *ptr)
62{
63	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
64}
65
66static inline void *
67ERR_CAST(const void *ptr)
68{
69	return __DECONST(void *, ptr);
70}
71
72static inline int
73PTR_ERR_OR_ZERO(const void *ptr)
74{
75	if (IS_ERR(ptr))
76		return PTR_ERR(ptr);
77	else
78		return 0;
79}
80
81#define PTR_RET(p) PTR_ERR_OR_ZERO(p)
82
83#endif	/* _LINUX_ERR_H_ */
84