FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_xxx.c
1 /* $NetBSD: subr_xxx.c,v 1.17 2006/11/01 10:17:59 yamt Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1986, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)subr_xxx.c 8.3 (Berkeley) 3/29/95
32 */
33
34 /*
35 * Miscellaneous trivial functions, including many
36 * that are often inline-expanded or done in assembler.
37 */
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: subr_xxx.c,v 1.17 2006/11/01 10:17:59 yamt Exp $");
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44
45 #include <machine/cpu.h>
46
47 /*
48 * Unsupported device function (e.g. writing to read-only device).
49 */
50 int
51 enodev(void)
52 {
53
54 return (ENODEV);
55 }
56
57 /*
58 * Unconfigured device function; driver not configured.
59 */
60 int
61 enxio(void)
62 {
63
64 return (ENXIO);
65 }
66
67 /*
68 * Unsupported ioctl function.
69 */
70 int
71 enoioctl(void)
72 {
73
74 return (ENOTTY);
75 }
76
77 /*
78 * Unsupported system function.
79 * This is used for an otherwise-reasonable operation
80 * that is not supported by the current system binary.
81 */
82 int
83 enosys(void)
84 {
85
86 return (ENOSYS);
87 }
88
89 /*
90 * Return error for operation not supported
91 * on a specific object or file type.
92 */
93 int
94 eopnotsupp(void)
95 {
96
97 return (EOPNOTSUPP);
98 }
99
100 /*
101 * Generic null operation, always returns success.
102 */
103 /*ARGSUSED*/
104 int
105 nullop(void *v)
106 {
107
108 return (0);
109 }
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