diff --git a/src/listhead.rs b/src/listhead.rs
index df947c6..fc31ada 100644
--- a/src/listhead.rs
+++ b/src/listhead.rs
@@ -53,8 +53,7 @@ impl<T> ListHead<T> {
         return self.next.ptr_eq(&self.prev);
     }
 
-    pub fn add_tail(&self,
-                    pnew: &Rc::<RefCell::<ListHead<T>>>) {
+    pub fn add_tail(&self, pnew: &Rc::<RefCell::<Self>>) {
         /*
         let prev = &mut head.borrow_mut().prev;
         let next = Rc::downgrade(head);
@@ -71,12 +70,12 @@ impl<T> ListHead<T> {
         return self.next.upgrade().unwrap().borrow().data();
     }
 
-    pub fn replace_init(head: &Rc::<RefCell::<ListHead<T>>>,
-                        pnew: &mut Rc::<RefCell::<ListHead<T>>>) {
+    pub fn replace_init(&self, pnew: &mut Rc::<RefCell::<Self>>) {
+        /*
         pnew.borrow_mut().next = head.borrow_mut().next.clone();
         pnew.borrow_mut().next.upgrade().unwrap().borrow_mut().prev = Rc::downgrade(pnew);
         pnew.borrow_mut().prev = head.borrow_mut().prev.clone();
-        head.borrow_mut().init();
+        head.borrow_mut().init();*/
     }
 
     pub fn for_each(&self, cb: fn (&Weak::<RefCell::<T>>) -> bool) {
diff --git a/src/timer.rs b/src/timer.rs
index 93b454a..611ea7a 100644
--- a/src/timer.rs
+++ b/src/timer.rs
@@ -211,11 +211,7 @@ impl Timer {
         }
         if !tv[index].borrow().empty() {
             let mut cascade_list = crate::ListHead::<TimerList>::new_head();
-            crate::ListHead::<TimerList>::replace_init
-                (
-                    &mut tv[index],
-                    &mut cascade_list
-                );
+            tv[index].borrow().replace_init(&mut cascade_list);
             while !cascade_list.borrow().empty() {
                 let timer = &cascade_list.borrow().first_entry().upgrade().unwrap();
                 timer.borrow_mut().timer_entry.borrow_mut().del_init();
@@ -241,11 +237,7 @@ impl Timer {
             }
             self.timer_tick += 1;
 
-            crate::ListHead::<TimerList>::replace_init
-                (
-                    &mut self.work_list,
-                    &mut self.tv1[index]
-                );
+            self.work_list.borrow().replace_init(&mut self.tv1[index]);
             while !self.work_list.borrow().empty() {
                 let timer = &self.work_list.borrow().first_entry();
                 self.running_timer = timer.clone();