Remove warnings

kernel/scheme/debug.rs

@@ -5,7 +5,7 @@ use super::Scheme;
 pub struct DebugScheme;
 
 impl Scheme for DebugScheme {
-    fn open(&mut self, path: &[u8], flags: usize) -> Result<usize> {
+    fn open(&mut self, path: &[u8], _flags: usize) -> Result<usize> {
         println!("DebugScheme::open: {}", unsafe { str::from_utf8_unchecked(path) });
         Ok(0)
     }
@@ -13,21 +13,21 @@ impl Scheme for DebugScheme {
     /// Read the file `number` into the `buffer`
     ///
     /// Returns the number of bytes read
-    fn read(&mut self, file: usize, buffer: &mut [u8]) -> Result<usize> {
+    fn read(&mut self, _file: usize, _buffer: &mut [u8]) -> Result<usize> {
         Ok(0)
     }
 
     /// Write the `buffer` to the `file`
     ///
     /// Returns the number of bytes written
-    fn write(&mut self, file: usize, buffer: &[u8]) -> Result<usize> {
+    fn write(&mut self, _file: usize, buffer: &[u8]) -> Result<usize> {
         //TODO: Write bytes, do not convert to str
         print!("{}", unsafe { str::from_utf8_unchecked(buffer) });
         Ok(buffer.len())
     }
 
     /// Close the file `number`
-    fn close(&mut self, file: usize) -> Result<()> {
+    fn close(&mut self, _file: usize) -> Result<()> {
         Ok(())
     }
 }