fix: functions with the "custom" ABI cannot have a return type

Author: criskell

src/interrupts.rs

@@ -1,6 +1,6 @@
 use crate::{gdt, print, println};
 use lazy_static::lazy_static;
-use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
+use pc_keyboard::{DecodedKey, HandleControl, Keyboard, ScancodeSet1, layouts};
 use pic8259::ChainedPics;
 use spin::{self, Mutex};
 use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
@@ -54,10 +54,7 @@ extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) {
     println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
 }
 
-extern "x86-interrupt" fn double_fault_handler(
-    stack_frame: InterruptStackFrame,
-    _error_code: u64,
-) -> ! {
+extern "x86-interrupt" fn double_fault_handler(stack_frame: InterruptStackFrame, _error_code: u64) {
     panic!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
 }