1 /* $NetBSD: lockdep.h,v 1.9 2021/12/19 11:49:12 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_LOCKDEP_H_
33 #define _LINUX_LOCKDEP_H_
34
35 #include <sys/cdefs.h>
36 #include <sys/types.h>
37
38 #include <lib/libkern/libkern.h>
39
40 struct lock_class_key;
41 struct mutex;
42 struct spinlock;
43
44 #define __acquires(lock) /* XXX lockdep annotation */
45 #define __releases(lock) /* XXX lockdep annotation */
46
47 #define mutex_acquire(m, x, y, ip) __nothing
48 #define mutex_release(m, ip) __nothing
49
50 #define __lockdep_used __unused
51 #define lockdep_init_map(a,b,c,d) __nothing
52 #define lock_acquire_shared_recursive(l, s, t, n, i) __nothing
53 #define lock_release(l, n) __nothing
54 #ifdef notyet
55 #define lockdep_assert_held(m) KDASSERT(lockdep_is_held(m))
56 #define lockdep_assert_held_once(m) KDASSERT(lockdep_is_held(m))
57 #define lockdep_is_held(m) mutex_owned(__lockdep_kmutex(m))
58 #define might_lock(m) \
59 KDASSERT(mutex_ownable(__lockdep_kmutex(m)))
60 #else
61 #define lockdep_assert_held(m) do {} while (0)
62 #define lockdep_assert_held_once(m) do {} while (0)
63 #define lockdep_is_held(m) 1
64 #define might_lock(m) do {} while (0)
65 #define might_lock_nested(m,n) do {} while (0)
66 #endif
67
68 #define __lockdep_kmutex(m) \
69 (__builtin_types_compatible_p(typeof(*(m)), struct mutex) ? \
70 &((const struct mutex *)(m))->mtx_lock \
71 : __builtin_types_compatible_p(typeof(*(m)), struct spinlock) ? \
72 &((const struct spinlock *)(m))->sl_lock \
73 : NULL)
74
75 #define SINGLE_DEPTH_NESTING 0
76
77 struct pin_cookie {
78 int dummy;
79 };
80
81 static inline struct pin_cookie
lockdep_pin_lock(struct mutex * m)82 lockdep_pin_lock(struct mutex *m)
83 {
84 return (struct pin_cookie) { (int)(intptr_t)m };
85 }
86
87 static inline void
lockdep_unpin_lock(struct mutex * m,struct pin_cookie cookie)88 lockdep_unpin_lock(struct mutex *m, struct pin_cookie cookie)
89 {
90 KASSERT(cookie.dummy == (int)(intptr_t)m);
91 }
92
93 static inline void
lockdep_set_class(void * m,struct lock_class_key * ck)94 lockdep_set_class(void *m, struct lock_class_key *ck)
95 {
96 }
97
98 static inline void
lockdep_set_subclass(void * m,unsigned subclass)99 lockdep_set_subclass(void *m, unsigned subclass)
100 {
101 }
102
103 #endif /* _LINUX_LOCKDEP_H_ */
104