函数逻辑报告

函数名称：Usually this function is quite similar to normal lookup. But the key of* a parent node may be smaller than the smallest key of all its siblings.* In such a case we cannot just return NULL, as we have only proven that no

函数原型：void *btree_get_prev(struct btree_head *head, struct btree_geo *geo, unsigned long *__key)

返回类型：void

参数：