1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LIBLOCKDEP_COMMON_H
3#define _LIBLOCKDEP_COMMON_H
4
5#include <pthread.h>
6
7#define NR_LOCKDEP_CACHING_CLASSES 2
8#define MAX_LOCKDEP_SUBCLASSES 8UL
9
10#ifndef CALLER_ADDR0
11#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
12#endif
13
14#ifndef _RET_IP_
15#define _RET_IP_ CALLER_ADDR0
16#endif
17
18#ifndef _THIS_IP_
19#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
20#endif
21
22struct lockdep_subclass_key {
23	char __one_byte;
24};
25
26struct lock_class_key {
27	struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
28};
29
30struct lockdep_map {
31	struct lock_class_key	*key;
32	struct lock_class	*class_cache[NR_LOCKDEP_CACHING_CLASSES];
33	const char		*name;
34#ifdef CONFIG_LOCK_STAT
35	int			cpu;
36	unsigned long		ip;
37#endif
38};
39
40void lockdep_init_map(struct lockdep_map *lock, const char *name,
41			struct lock_class_key *key, int subclass);
42void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
43			int trylock, int read, int check,
44			struct lockdep_map *nest_lock, unsigned long ip);
45void lock_release(struct lockdep_map *lock, unsigned long ip);
46void lockdep_reset_lock(struct lockdep_map *lock);
47void lockdep_register_key(struct lock_class_key *key);
48void lockdep_unregister_key(struct lock_class_key *key);
49extern void debug_check_no_locks_freed(const void *from, unsigned long len);
50
51#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
52	{ .name = (_name), .key = (void *)(_key), }
53
54#endif
55