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kernel/lockdep_internals.h
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/* * 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 |
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#define MAX_LOCKDEP_CHAINS_BITS 14 |
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#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS) |
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#define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5) |
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/* * Stack-trace: tightly packed array of stack backtrace * addresses. Protected by the hash_lock. */ |
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#define MAX_STACK_TRACE_ENTRIES 262144UL |
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extern struct list_head all_lock_classes; |
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extern struct lock_chain lock_chains[]; |
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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); |
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struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i); |
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extern unsigned long nr_lock_classes; extern unsigned long nr_list_entries; extern unsigned long nr_lock_chains; |
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extern int nr_chain_hlocks; |
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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; |
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#ifdef CONFIG_PROVE_LOCKING |
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extern unsigned long lockdep_count_forward_deps(struct lock_class *); extern unsigned long lockdep_count_backward_deps(struct lock_class *); |
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#else static inline unsigned long lockdep_count_forward_deps(struct lock_class *class) { return 0; } static inline unsigned long lockdep_count_backward_deps(struct lock_class *class) { return 0; } #endif |
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#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 |