35  * The bottom two bits of the slot determine how the remaining bits in the
36  * slot are interpreted:
43  * sibling entry, or an indicator that the entry in this slot has been moved
92  * @index:	index of current slot
95  * @node:	node that contains current slot
99  * described by a pointer to its first slot and a struct radix_tree_iter
163  * radix_tree_deref_slot - dereference a slot
164  * @slot: slot pointer, returned by radix_tree_lookup_slot
167  * locked across slot lookup and dereference. Not required if write lock is
173  * Return: entry stored in that slot.
175 static inline void *radix_tree_deref_slot(void __rcu **slot)  in radix_tree_deref_slot()  argument
177 	return rcu_dereference(*slot);  in radix_tree_deref_slot()
181  * radix_tree_deref_slot_protected - dereference a slot with tree lock held
182  * @slot: slot pointer, returned by radix_tree_lookup_slot
187  * Return: entry stored in that slot.
189 static inline void *radix_tree_deref_slot_protected(void __rcu **slot,  in radix_tree_deref_slot_protected()  argument
192 	return rcu_dereference_protected(*slot, lockdep_is_held(treelock));  in radix_tree_deref_slot_protected()
225 			  void __rcu **slot, void *entry);
227 		const struct radix_tree_iter *, void __rcu **slot, void *entry);
229 			     void __rcu **slot, void *entry);
231 			struct radix_tree_iter *iter, void __rcu **slot);
300  * Returns:	pointer to chunk first slot, or NULL if there no more left
303  * @iter->next_index.  It returns a pointer to the chunk's first slot.
316  * If @index is present in the radix tree, this function returns the slot
333  * against deletion or creation may result in seeing a slot for which
353  * @slot: pointer to current slot
355  * Returns: New slot pointer
361 void __rcu **__must_check radix_tree_iter_resume(void __rcu **slot,
377  * radix_tree_next_slot - find next slot in chunk
379  * @slot:	pointer to current slot
382  * Returns:	pointer to next slot, or NULL if there no more left
387  * There are several cases where 'slot' can be passed in as NULL to this
390  * 'slot' because either:
395 static __always_inline void __rcu **radix_tree_next_slot(void __rcu **slot,  in radix_tree_next_slot()  argument
404 			slot++;  in radix_tree_next_slot()
412 			slot += offset;  in radix_tree_next_slot()
419 			slot++;  in radix_tree_next_slot()
422 			if (likely(*slot))  in radix_tree_next_slot()
434 	return slot;  in radix_tree_next_slot()
440  * @slot:	the void** variable for pointer to slot
445  * @slot points to radix tree slot, @iter->index contains its index.
447 #define radix_tree_for_each_slot(slot, root, iter, start)		\  argument
448 	for (slot = radix_tree_iter_init(iter, start) ;			\
449 	     slot || (slot = radix_tree_next_chunk(root, iter, 0)) ;	\
450 	     slot = radix_tree_next_slot(slot, iter, 0))
455  * @slot:	the void** variable for pointer to slot
461  * @slot points to radix tree slot, @iter->index contains its index.
463 #define radix_tree_for_each_tagged(slot, root, iter, start, tag)	\  argument
464 	for (slot = radix_tree_iter_init(iter, start) ;			\
465 	     slot || (slot = radix_tree_next_chunk(root, iter,		\
467 	     slot = radix_tree_next_slot(slot, iter,			\