warning assignment from incompatible pointer type

/*
	@warning: assignment from incompatible pointer type    （指针类型不匹配）   
*/
	//原代码
	struct Node
  		datatype data;
  		struct Node *next;
 		struct Node *pre;
	};
	typedef struct Node nodes;
	typedef struct Node *list;      //与结构体中的指针类型冲突
	//修改后的代码
	typedef struct Node *list; 
	struct Node
		datatype data;
  		list next;
  		list pre; 
	};
	typedef struct Node nodes;