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 22 struct lockdep_subclass_key { 23 char __one_byte; 24 }; 25 26 struct lock_class_key { 27 struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; 28 }; 29 30 struct 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 40 void lockdep_init_map(struct lockdep_map *lock, const char *name, 41 struct lock_class_key *key, int subclass); 42 void 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); 45 void lock_release(struct lockdep_map *lock, unsigned long ip); 46 void lockdep_reset_lock(struct lockdep_map *lock); 47 void lockdep_register_key(struct lock_class_key *key); 48 void lockdep_unregister_key(struct lock_class_key *key); 49 extern 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