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