25  * The bottom two bits of the slot determine how the remaining bits in the
26  * slot are interpreted:
33  * sibling entry, or an indicator that the entry in this slot has been moved
82  * @index:	index of current slot
85  * @node:	node that contains current slot
89  * described by a pointer to its first slot and a struct radix_tree_iter
153  * radix_tree_deref_slot - dereference a slot
154  * @slot: slot pointer, returned by radix_tree_lookup_slot
157  * locked across slot lookup and dereference. Not required if write lock is
163  * Return: entry stored in that slot.
165 static inline void *radix_tree_deref_slot(void __rcu **slot)  in radix_tree_deref_slot()  argument
167 	return rcu_dereference(*slot);  in radix_tree_deref_slot()
171  * radix_tree_deref_slot_protected - dereference a slot with tree lock held
172  * @slot: slot pointer, returned by radix_tree_lookup_slot
177  * Return: entry stored in that slot.
179 static inline void *radix_tree_deref_slot_protected(void __rcu **slot,  in radix_tree_deref_slot_protected()  argument
182 	return rcu_dereference_protected(*slot, lockdep_is_held(treelock));  in radix_tree_deref_slot_protected()
215 			  void __rcu **slot, void *entry);
217 		const struct radix_tree_iter *, void __rcu **slot, void *entry);
219 			     void __rcu **slot, void *entry);
221 			struct radix_tree_iter *iter, void __rcu **slot);
290  * Returns:	pointer to chunk first slot, or NULL if there no more left
293  * @iter->next_index.  It returns a pointer to the chunk's first slot.
306  * If @index is present in the radix tree, this function returns the slot
323  * against deletion or creation may result in seeing a slot for which
343  * @slot: pointer to current slot
345  * Returns: New slot pointer
351 void __rcu **__must_check radix_tree_iter_resume(void __rcu **slot,
367  * radix_tree_next_slot - find next slot in chunk
369  * @slot:	pointer to current slot
372  * Returns:	pointer to next slot, or NULL if there no more left
377  * There are several cases where 'slot' can be passed in as NULL to this
380  * 'slot' because either:
385 static __always_inline void __rcu **radix_tree_next_slot(void __rcu **slot,  in radix_tree_next_slot()  argument
394 			slot++;  in radix_tree_next_slot()
402 			slot += offset;  in radix_tree_next_slot()
409 			slot++;  in radix_tree_next_slot()
412 			if (likely(*slot))  in radix_tree_next_slot()
424 	return slot;  in radix_tree_next_slot()
430  * @slot:	the void** variable for pointer to slot
435  * @slot points to radix tree slot, @iter->index contains its index.
437 #define radix_tree_for_each_slot(slot, root, iter, start)		\  argument
438 	for (slot = radix_tree_iter_init(iter, start) ;			\
439 	     slot || (slot = radix_tree_next_chunk(root, iter, 0)) ;	\
440 	     slot = radix_tree_next_slot(slot, iter, 0))
445  * @slot:	the void** variable for pointer to slot
451  * @slot points to radix tree slot, @iter->index contains its index.
453 #define radix_tree_for_each_tagged(slot, root, iter, start, tag)	\  argument
454 	for (slot = radix_tree_iter_init(iter, start) ;			\
455 	     slot || (slot = radix_tree_next_chunk(root, iter,		\
457 	     slot = radix_tree_next_slot(slot, iter,			\