diff --git a/crate/process/src/process_manager.rs b/crate/process/src/process_manager.rs
index 732b046..4d00b8a 100644
--- a/crate/process/src/process_manager.rs
+++ b/crate/process/src/process_manager.rs
@@ -41,18 +41,16 @@ pub struct ProcessManager {
     wait_queue: Vec<Mutex<Vec<Pid>>>,
     children: Vec<Mutex<Vec<Pid>>>,
     event_hub: Mutex<EventHub<Event>>,
-    exit_handler: fn(Pid),
 }
 
 impl ProcessManager {
-    pub fn new(scheduler: Box<Scheduler>, max_proc_num: usize, exit_handler: fn(Pid)) -> Self {
+    pub fn new(scheduler: Box<Scheduler>, max_proc_num: usize) -> Self {
         ProcessManager {
             procs: new_vec_default(max_proc_num),
             scheduler: Mutex::new(scheduler),
             wait_queue: new_vec_default(max_proc_num),
             children: new_vec_default(max_proc_num),
             event_hub: Mutex::new(EventHub::new()),
-            exit_handler,
         }
     }
 
@@ -231,9 +229,7 @@ impl ProcessManager {
         for waiter in self.wait_queue[pid].lock().iter() {
             self.wakeup(*waiter);
         }
-
         proc.context = None;
-        (self.exit_handler)(pid);
     }
 }
 
diff --git a/kernel/src/process/mod.rs b/kernel/src/process/mod.rs
index 65c1980..3d04f7e 100644
--- a/kernel/src/process/mod.rs
+++ b/kernel/src/process/mod.rs
@@ -11,7 +11,7 @@ pub mod context;
 pub fn init() {
     // NOTE: max_time_slice <= 5 to ensure 'priority' test pass
     let scheduler = Box::new(scheduler::RRScheduler::new(5));
-    let manager = Arc::new(ProcessManager::new(scheduler, MAX_PROCESS_NUM, Process::proc_exit));
+    let manager = Arc::new(ProcessManager::new(scheduler, MAX_PROCESS_NUM));
 
     extern fn idle(_arg: usize) -> ! {
         loop { cpu::halt(); }
@@ -30,18 +30,6 @@ pub fn init() {
 
 static PROCESSORS: [Processor; MAX_CPU_NUM] = [Processor::new(), Processor::new(), Processor::new(), Processor::new(), Processor::new(), Processor::new(), Processor::new(), Processor::new()];
 
-#[derive(Default)]
-pub struct Process {
-    parent: AtomicUsize,
-    children: Mutex<Vec<usize>>,
-}
-
-impl Process {
-    pub fn proc_exit(pid: usize) {
-        info!("proc_exit");
-    }
-}
-
 /// Get current thread struct
 pub fn process() -> &'static mut ContextImpl {
     use core::mem::transmute;