Try some filesystems

src/user.rs

@@ -2,18 +2,16 @@ use core::time::Duration;
 
 use crate::syscall::{sleep, write_string_temp};
 
-pub extern "C" fn test() {
+pub fn test() {
     loop {
         write_string_temp("test");
-        // enable_supervisor_interrupt();
         sleep(Duration::new(2, 0));
     }
 }
 
-pub extern "C" fn proc2() {
+pub fn proc2() {
     loop {
         write_string_temp("proc2");
-        // enable_supervisor_interrupt();
         sleep(Duration::new(3, 0));
     }
 }