diff --git a/kernel/src/arch/x86_64/interrupt/handler.rs b/kernel/src/arch/x86_64/interrupt/handler.rs
index 2b5c099..0996b53 100644
--- a/kernel/src/arch/x86_64/interrupt/handler.rs
+++ b/kernel/src/arch/x86_64/interrupt/handler.rs
@@ -86,7 +86,7 @@ pub extern "C" fn rust_trap(tf: &mut TrapFrame) {
         Breakpoint => breakpoint(),
         DoubleFault => double_fault(tf),
         PageFault => page_fault(tf),
-        IRQ0...63 => {
+        IRQ0..=63 => {
             let irq = tf.trap_num as u8 - IRQ0;
             super::ack(irq); // must ack before switching
             match irq {
diff --git a/kernel/src/arch/x86_64/paging.rs b/kernel/src/arch/x86_64/paging.rs
index 92a5baf..99711fd 100644
--- a/kernel/src/arch/x86_64/paging.rs
+++ b/kernel/src/arch/x86_64/paging.rs
@@ -282,8 +282,8 @@ impl FrameDeallocator<Size4KiB> for FrameAllocatorForX86 {
 fn flush_tlb_all(vaddr: usize) {
     // FIXME: too slow, disable now.
     return;
-    if !super::AP_CAN_INIT.load(Ordering::Relaxed) {
-        return;
-    }
-    super::ipi::invoke_on_allcpu(move || tlb::flush(VirtAddr::new(vaddr as u64)), false);
+    // if !super::AP_CAN_INIT.load(Ordering::Relaxed) {
+    //     return;
+    // }
+    // super::ipi::invoke_on_allcpu(move || tlb::flush(VirtAddr::new(vaddr as u64)), false);
 }