| /* |
| * kernel/lockdep_internals.h |
| * |
| * Runtime locking correctness validator |
| * |
| * lockdep subsystem internal functions and variables. |
| */ |
| |
| /* |
| * MAX_LOCKDEP_ENTRIES is the maximum number of lock dependencies |
| * we track. |
| * |
| * We use the per-lock dependency maps in two ways: we grow it by adding |
| * every to-be-taken lock to all currently held lock's own dependency |
| * table (if it's not there yet), and we check it for lock order |
| * conflicts and deadlocks. |
| */ |
| #define MAX_LOCKDEP_ENTRIES 8192UL |
| |
| #define MAX_LOCKDEP_KEYS_BITS 11 |
| #define MAX_LOCKDEP_KEYS (1UL << MAX_LOCKDEP_KEYS_BITS) |
| |
| #define MAX_LOCKDEP_CHAINS_BITS 14 |
| #define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS) |
| |
| #define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5) |
| |
| /* |
| * Stack-trace: tightly packed array of stack backtrace |
| * addresses. Protected by the hash_lock. |
| */ |
| #define MAX_STACK_TRACE_ENTRIES 262144UL |
| |
| extern struct list_head all_lock_classes; |
| extern struct lock_chain lock_chains[]; |
| |
| extern void |
| get_usage_chars(struct lock_class *class, char *c1, char *c2, char *c3, char *c4); |
| |
| extern const char * __get_key_name(struct lockdep_subclass_key *key, char *str); |
| |
| struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i); |
| |
| extern unsigned long nr_lock_classes; |
| extern unsigned long nr_list_entries; |
| extern unsigned long nr_lock_chains; |
| extern int nr_chain_hlocks; |
| extern unsigned long nr_stack_trace_entries; |
| |
| extern unsigned int nr_hardirq_chains; |
| extern unsigned int nr_softirq_chains; |
| extern unsigned int nr_process_chains; |
| extern unsigned int max_lockdep_depth; |
| extern unsigned int max_recursion_depth; |
| |
| #ifdef CONFIG_DEBUG_LOCKDEP |
| /* |
| * Various lockdep statistics: |
| */ |
| extern atomic_t chain_lookup_hits; |
| extern atomic_t chain_lookup_misses; |
| extern atomic_t hardirqs_on_events; |
| extern atomic_t hardirqs_off_events; |
| extern atomic_t redundant_hardirqs_on; |
| extern atomic_t redundant_hardirqs_off; |
| extern atomic_t softirqs_on_events; |
| extern atomic_t softirqs_off_events; |
| extern atomic_t redundant_softirqs_on; |
| extern atomic_t redundant_softirqs_off; |
| extern atomic_t nr_unused_locks; |
| extern atomic_t nr_cyclic_checks; |
| extern atomic_t nr_cyclic_check_recursions; |
| extern atomic_t nr_find_usage_forwards_checks; |
| extern atomic_t nr_find_usage_forwards_recursions; |
| extern atomic_t nr_find_usage_backwards_checks; |
| extern atomic_t nr_find_usage_backwards_recursions; |
| # define debug_atomic_inc(ptr) atomic_inc(ptr) |
| # define debug_atomic_dec(ptr) atomic_dec(ptr) |
| # define debug_atomic_read(ptr) atomic_read(ptr) |
| #else |
| # define debug_atomic_inc(ptr) do { } while (0) |
| # define debug_atomic_dec(ptr) do { } while (0) |
| # define debug_atomic_read(ptr) 0 |
| #endif |