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Rev 1408 Rev 1964
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#define XXX_LOCK_USAGE_STATES		(1+3*4)
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#define XXX_LOCK_USAGE_STATES		(1+3*4)
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#define MAX_LOCKDEP_SUBCLASSES		8UL
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#define MAX_LOCKDEP_SUBCLASSES		8UL
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/*
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 * NR_LOCKDEP_CACHING_CLASSES ... Number of classes
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 * cached in the instance of lockdep_map
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 *
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 * Currently main class (subclass == 0) and signle depth subclass
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 * are cached in lockdep_map. This optimization is mainly targeting
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 * on rq->lock. double_rq_lock() acquires this highly competitive with
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 * single depth.
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 */
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#define NR_LOCKDEP_CACHING_CLASSES	2
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/*
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/*
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 * Lock-classes are keyed via unique addresses, by embedding the
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 * Lock-classes are keyed via unique addresses, by embedding the
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 * lockclass-key into the kernel (or module) .data section. (For
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 * lockclass-key into the kernel (or module) .data section. (For
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 * static locks we use the lock address itself as the key.)
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 * static locks we use the lock address itself as the key.)
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 * Map the lock object (the lock instance) to the lock-class object.
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 * Map the lock object (the lock instance) to the lock-class object.
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 * This is embedded into specific lock instances:
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 * This is embedded into specific lock instances:
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 */
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 */
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struct lockdep_map {
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struct lockdep_map {
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	struct lock_class_key		*key;
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	struct lock_class_key		*key;
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	struct lock_class		*class_cache;
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	struct lock_class		*class_cache[NR_LOCKDEP_CACHING_CLASSES];
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	const char			*name;
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	const char			*name;
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#ifdef CONFIG_LOCK_STAT
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#ifdef CONFIG_LOCK_STAT
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	int				cpu;
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	int				cpu;
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	unsigned long			ip;
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	unsigned long			ip;
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#endif
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#endif
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#define lockdep_set_class_and_subclass(lock, key, sub) \
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#define lockdep_set_class_and_subclass(lock, key, sub) \
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		lockdep_init_map(&(lock)->dep_map, #key, key, sub)
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		lockdep_init_map(&(lock)->dep_map, #key, key, sub)
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#define lockdep_set_subclass(lock, sub)	\
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#define lockdep_set_subclass(lock, sub)	\
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		lockdep_init_map(&(lock)->dep_map, #lock, \
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		lockdep_init_map(&(lock)->dep_map, #lock, \
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				 (lock)->dep_map.key, sub)
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				 (lock)->dep_map.key, sub)
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#define lockdep_set_novalidate_class(lock) \
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	lockdep_set_class(lock, &__lockdep_no_validate__)
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/*
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/*
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 * Compare locking classes
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 * Compare locking classes
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 */
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 */
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#define lockdep_match_class(lock, key) lockdep_match_key(&(lock)->dep_map, key)
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#define lockdep_match_class(lock, key) lockdep_match_key(&(lock)->dep_map, key)
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# define lockdep_set_class_and_name(lock, key, name) \
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# define lockdep_set_class_and_name(lock, key, name) \
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		do { (void)(key); (void)(name); } while (0)
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		do { (void)(key); (void)(name); } while (0)
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#define lockdep_set_class_and_subclass(lock, key, sub) \
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#define lockdep_set_class_and_subclass(lock, key, sub) \
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		do { (void)(key); } while (0)
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		do { (void)(key); } while (0)
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#define lockdep_set_subclass(lock, sub)		do { } while (0)
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#define lockdep_set_subclass(lock, sub)		do { } while (0)
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#define lockdep_set_novalidate_class(lock) do { } while (0)
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/*
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/*
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 * We don't define lockdep_match_class() and lockdep_match_key() for !LOCKDEP
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 * We don't define lockdep_match_class() and lockdep_match_key() for !LOCKDEP
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 * case since the result is not well defined and the caller should rather
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 * case since the result is not well defined and the caller should rather
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 * #ifdef the call himself.
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 * #ifdef the call himself.
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 */
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 */
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#define LOCK_CONTENDED_FLAGS(_lock, try, lock, lockfl, flags) \
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#define LOCK_CONTENDED_FLAGS(_lock, try, lock, lockfl, flags) \
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	lockfl((_lock), (flags))
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	lockfl((_lock), (flags))
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#endif /* CONFIG_LOCKDEP */
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#ifdef CONFIG_GENERIC_HARDIRQS
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extern void early_init_irq_lock_class(void);
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#else
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static inline void early_init_irq_lock_class(void)
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{
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}
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#endif
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#endif /* CONFIG_LOCKDEP */
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#ifdef CONFIG_TRACE_IRQFLAGS
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#ifdef CONFIG_TRACE_IRQFLAGS
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extern void early_boot_irqs_off(void);
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extern void early_boot_irqs_off(void);
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extern void early_boot_irqs_on(void);
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extern void early_boot_irqs_on(void);
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#else
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#else
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# define might_lock(lock) do { } while (0)
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# define might_lock(lock) do { } while (0)
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# define might_lock_read(lock) do { } while (0)
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# define might_lock_read(lock) do { } while (0)
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#endif
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#endif
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#ifdef CONFIG_PROVE_RCU
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extern void lockdep_rcu_dereference(const char *file, const int line);
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#endif
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