keyboard through PCI&VirtIO

src/io.rs

@@ -62,10 +62,10 @@ macro_rules! print {
 #[macro_export]
 macro_rules! println {
     () => {
-        $crate::print!("\n\r");
+        $crate::print!("\n\r")
     };
     ($($args:expr),*) => {
         $crate::print!($($args),*);
-        $crate::println!();
+        $crate::println!()
     };
 }