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Linux/tools/lib/lockdep/include/liblockdep/common.h

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  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 
 21 struct lockdep_subclass_key {
 22         char __one_byte;
 23 };
 24 
 25 struct lock_class_key {
 26         struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
 27 };
 28 
 29 struct 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 
 39 void lockdep_init_map(struct lockdep_map *lock, const char *name,
 40                         struct lock_class_key *key, int subclass);
 41 void 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);
 44 void 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 

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