git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| fbb9ce95 IM |
1 | /* |
| 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 | ||
| 50cc670a | 23 | #define MAX_LOCKDEP_CHAINS_BITS 14 |
| fbb9ce95 IM |
24 | #define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS) |
| 25 | ||
| 443cd507 HY |
26 | #define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5) |
| 27 | ||
| fbb9ce95 IM |
28 | /* |
| 29 | * Stack-trace: tightly packed array of stack backtrace | |
| 30 | * addresses. Protected by the hash_lock. | |
| 31 | */ | |
| 9bb25bf3 | 32 | #define MAX_STACK_TRACE_ENTRIES 262144UL |
| fbb9ce95 IM |
33 | |
| 34 | extern struct list_head all_lock_classes; | |
| 443cd507 | 35 | extern struct lock_chain lock_chains[]; |
| fbb9ce95 IM |
36 | |
| 37 | extern void | |
| 38 | get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3, char *c4); | |
| 39 | ||
| 40 | extern const char * __get_key_name(struct lockdep_subclass_key *key, char *str); | |
| 41 | ||
| 443cd507 HY |
42 | struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i); |
| 43 | ||
| fbb9ce95 IM |
44 | extern unsigned long nr_lock_classes; |
| 45 | extern unsigned long nr_list_entries; | |
| 46 | extern unsigned long nr_lock_chains; | |
| cd1a28e8 | 47 | extern int nr_chain_hlocks; |
| fbb9ce95 IM |
48 | extern unsigned long nr_stack_trace_entries; |
| 49 | ||
| 50 | extern unsigned int nr_hardirq_chains; | |
| 51 | extern unsigned int nr_softirq_chains; | |
| 52 | extern unsigned int nr_process_chains; | |
| 53 | extern unsigned int max_lockdep_depth; | |
| 54 | extern unsigned int max_recursion_depth; | |
| 55 | ||
| 56 | #ifdef CONFIG_DEBUG_LOCKDEP | |
| 57 | /* | |
| 58 | * Various lockdep statistics: | |
| 59 | */ | |
| 60 | extern atomic_t chain_lookup_hits; | |
| 61 | extern atomic_t chain_lookup_misses; | |
| 62 | extern atomic_t hardirqs_on_events; | |
| 63 | extern atomic_t hardirqs_off_events; | |
| 64 | extern atomic_t redundant_hardirqs_on; | |
| 65 | extern atomic_t redundant_hardirqs_off; | |
| 66 | extern atomic_t softirqs_on_events; | |
| 67 | extern atomic_t softirqs_off_events; | |
| 68 | extern atomic_t redundant_softirqs_on; | |
| 69 | extern atomic_t redundant_softirqs_off; | |
| 70 | extern atomic_t nr_unused_locks; | |
| 71 | extern atomic_t nr_cyclic_checks; | |
| 72 | extern atomic_t nr_cyclic_check_recursions; | |
| 73 | extern atomic_t nr_find_usage_forwards_checks; | |
| 74 | extern atomic_t nr_find_usage_forwards_recursions; | |
| 75 | extern atomic_t nr_find_usage_backwards_checks; | |
| 76 | extern atomic_t nr_find_usage_backwards_recursions; | |
| 77 | # define debug_atomic_inc(ptr) atomic_inc(ptr) | |
| 78 | # define debug_atomic_dec(ptr) atomic_dec(ptr) | |
| 79 | # define debug_atomic_read(ptr) atomic_read(ptr) | |
| 80 | #else | |
| 81 | # define debug_atomic_inc(ptr) do { } while (0) | |
| 82 | # define debug_atomic_dec(ptr) do { } while (0) | |
| 83 | # define debug_atomic_read(ptr) 0 | |
| 84 | #endif |