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

   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