函数逻辑报告

函数名称：adix_tree_iter_lookup - look up an index in the radix tree*@root: radix tree root*@iter: iterator state*@index: key to look up* If @index is present in the radix tree, this function returns the slot* containing it and updates @iter to describe the entry

函数原型：static inline void __rcu **radix_tree_iter_lookup(const struct xarray *root, struct radix_tree_iter *iter, unsigned long index)

返回类型：void

参数：