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Rev 5056 Rev 5270
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 */
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 */
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#ifndef _LINUX_RESERVATION_H
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#ifndef _LINUX_RESERVATION_H
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#define _LINUX_RESERVATION_H
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#define _LINUX_RESERVATION_H
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#include
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#include
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#include
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#include
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#include
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#include
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extern struct ww_class reservation_ww_class;
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extern struct lock_class_key reservation_seqcount_class;
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extern const char reservation_seqcount_string[];
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struct reservation_object_list {
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	struct rcu_head rcu;
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	u32 shared_count, shared_max;
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	struct fence __rcu *shared[];
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extern struct ww_class reservation_ww_class;
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};
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struct reservation_object {
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	struct ww_mutex lock;
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	seqcount_t seq;
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	struct fence __rcu *fence_excl;
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	struct reservation_object_list __rcu *fence;
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	struct reservation_object_list *staged;
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};
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struct reservation_object {
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#define reservation_object_held(obj) lockdep_is_held(&(obj)->lock.base)
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	struct ww_mutex lock;
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#define reservation_object_assert_held(obj) \
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};
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	lockdep_assert_held(&(obj)->lock.base)
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static inline void
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reservation_object_init(struct reservation_object *obj)
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{
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	ww_mutex_init(&obj->lock, &reservation_ww_class);
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static inline void
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	__seqcount_init(&obj->seq, reservation_seqcount_string, &reservation_seqcount_class);
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reservation_object_init(struct reservation_object *obj)
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	RCU_INIT_POINTER(obj->fence, NULL);
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{
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	RCU_INIT_POINTER(obj->fence_excl, NULL);
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	ww_mutex_init(&obj->lock, &reservation_ww_class);
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	obj->staged = NULL;
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}
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static inline void
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reservation_object_fini(struct reservation_object *obj)
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{
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	int i;
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	struct reservation_object_list *fobj;
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	struct fence *excl;
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	/*
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	 * This object should be dead and all references must have
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	 * been released to it, so no need to be protected with rcu.
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	 */
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	excl = rcu_dereference_protected(obj->fence_excl, 1);
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	if (excl)
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		fence_put(excl);
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	fobj = rcu_dereference_protected(obj->fence, 1);
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	if (fobj) {
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		for (i = 0; i < fobj->shared_count; ++i)
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			fence_put(rcu_dereference_protected(fobj->shared[i], 1));
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}
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		kfree(fobj);
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	}
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	kfree(obj->staged);
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	ww_mutex_destroy(&obj->lock);
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}
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static inline struct reservation_object_list *
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reservation_object_get_list(struct reservation_object *obj)
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{
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	return rcu_dereference_protected(obj->fence,
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					 reservation_object_held(obj));
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}
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static inline struct fence *
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reservation_object_get_excl(struct reservation_object *obj)
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{
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	return rcu_dereference_protected(obj->fence_excl,
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					 reservation_object_held(obj));
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}
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int reservation_object_reserve_shared(struct reservation_object *obj);
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void reservation_object_add_shared_fence(struct reservation_object *obj,
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					 struct fence *fence);
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void reservation_object_add_excl_fence(struct reservation_object *obj,
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				       struct fence *fence);
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int reservation_object_get_fences_rcu(struct reservation_object *obj,
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				      struct fence **pfence_excl,
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				      unsigned *pshared_count,
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				      struct fence ***pshared);
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long reservation_object_wait_timeout_rcu(struct reservation_object *obj,
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static inline void
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					 bool wait_all, bool intr,