| 1 |
3 |
xianfeng |
/*
|
| 2 |
|
|
* kernel/lockdep_internals.h
|
| 3 |
|
|
*
|
| 4 |
|
|
* Runtime locking correctness validator
|
| 5 |
|
|
*
|
| 6 |
|
|
* lockdep subsystem internal functions and variables.
|
| 7 |
|
|
*/
|
| 8 |
|
|
|
| 9 |
|
|
/*
|
| 10 |
|
|
* MAX_LOCKDEP_ENTRIES is the maximum number of lock dependencies
|
| 11 |
|
|
* we track.
|
| 12 |
|
|
*
|
| 13 |
|
|
* We use the per-lock dependency maps in two ways: we grow it by adding
|
| 14 |
|
|
* every to-be-taken lock to all currently held lock's own dependency
|
| 15 |
|
|
* table (if it's not there yet), and we check it for lock order
|
| 16 |
|
|
* conflicts and deadlocks.
|
| 17 |
|
|
*/
|
| 18 |
|
|
#define MAX_LOCKDEP_ENTRIES 8192UL
|
| 19 |
|
|
|
| 20 |
|
|
#define MAX_LOCKDEP_KEYS_BITS 11
|
| 21 |
|
|
#define MAX_LOCKDEP_KEYS (1UL << MAX_LOCKDEP_KEYS_BITS)
|
| 22 |
|
|
|
| 23 |
|
|
#define MAX_LOCKDEP_CHAINS_BITS 14
|
| 24 |
|
|
#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS)
|
| 25 |
|
|
|
| 26 |
|
|
/*
|
| 27 |
|
|
* Stack-trace: tightly packed array of stack backtrace
|
| 28 |
|
|
* addresses. Protected by the hash_lock.
|
| 29 |
|
|
*/
|
| 30 |
|
|
#define MAX_STACK_TRACE_ENTRIES 262144UL
|
| 31 |
|
|
|
| 32 |
|
|
extern struct list_head all_lock_classes;
|
| 33 |
|
|
|
| 34 |
|
|
extern void
|
| 35 |
|
|
get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3, char *c4);
|
| 36 |
|
|
|
| 37 |
|
|
extern const char * __get_key_name(struct lockdep_subclass_key *key, char *str);
|
| 38 |
|
|
|
| 39 |
|
|
extern unsigned long nr_lock_classes;
|
| 40 |
|
|
extern unsigned long nr_list_entries;
|
| 41 |
|
|
extern unsigned long nr_lock_chains;
|
| 42 |
|
|
extern unsigned long nr_stack_trace_entries;
|
| 43 |
|
|
|
| 44 |
|
|
extern unsigned int nr_hardirq_chains;
|
| 45 |
|
|
extern unsigned int nr_softirq_chains;
|
| 46 |
|
|
extern unsigned int nr_process_chains;
|
| 47 |
|
|
extern unsigned int max_lockdep_depth;
|
| 48 |
|
|
extern unsigned int max_recursion_depth;
|
| 49 |
|
|
|
| 50 |
|
|
#ifdef CONFIG_DEBUG_LOCKDEP
|
| 51 |
|
|
/*
|
| 52 |
|
|
* Various lockdep statistics:
|
| 53 |
|
|
*/
|
| 54 |
|
|
extern atomic_t chain_lookup_hits;
|
| 55 |
|
|
extern atomic_t chain_lookup_misses;
|
| 56 |
|
|
extern atomic_t hardirqs_on_events;
|
| 57 |
|
|
extern atomic_t hardirqs_off_events;
|
| 58 |
|
|
extern atomic_t redundant_hardirqs_on;
|
| 59 |
|
|
extern atomic_t redundant_hardirqs_off;
|
| 60 |
|
|
extern atomic_t softirqs_on_events;
|
| 61 |
|
|
extern atomic_t softirqs_off_events;
|
| 62 |
|
|
extern atomic_t redundant_softirqs_on;
|
| 63 |
|
|
extern atomic_t redundant_softirqs_off;
|
| 64 |
|
|
extern atomic_t nr_unused_locks;
|
| 65 |
|
|
extern atomic_t nr_cyclic_checks;
|
| 66 |
|
|
extern atomic_t nr_cyclic_check_recursions;
|
| 67 |
|
|
extern atomic_t nr_find_usage_forwards_checks;
|
| 68 |
|
|
extern atomic_t nr_find_usage_forwards_recursions;
|
| 69 |
|
|
extern atomic_t nr_find_usage_backwards_checks;
|
| 70 |
|
|
extern atomic_t nr_find_usage_backwards_recursions;
|
| 71 |
|
|
# define debug_atomic_inc(ptr) atomic_inc(ptr)
|
| 72 |
|
|
# define debug_atomic_dec(ptr) atomic_dec(ptr)
|
| 73 |
|
|
# define debug_atomic_read(ptr) atomic_read(ptr)
|
| 74 |
|
|
#else
|
| 75 |
|
|
# define debug_atomic_inc(ptr) do { } while (0)
|
| 76 |
|
|
# define debug_atomic_dec(ptr) do { } while (0)
|
| 77 |
|
|
# define debug_atomic_read(ptr) 0
|
| 78 |
|
|
#endif
|
