Update to new dependencies

src/allocator/linked_list.rs

@@ -1,4 +1,4 @@
-use alloc::heap::{AllocErr, GlobalAlloc, Layout, Opaque};
+use core::alloc::{AllocErr, GlobalAlloc, Layout};
 use core::ptr::NonNull;
 use linked_list_allocator::Heap;
 use spin::Mutex;
@@ -16,7 +16,7 @@ impl Allocator {
 }
 
 unsafe impl GlobalAlloc for Allocator {
-    unsafe fn alloc(&self, layout: Layout) -> *mut Opaque {
+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
         loop {
             let res = if let Some(ref mut heap) = *HEAP.lock() {
                 heap.allocate_first_fit(layout)
@@ -40,12 +40,12 @@ unsafe impl GlobalAlloc for Allocator {
                         panic!("__rust_allocate: heap not initialized");
                     }
                 },
-                other => return other.ok().map_or(0 as *mut Opaque, |allocation| allocation.as_ptr()),
+                other => return other.ok().map_or(0 as *mut u8, |allocation| allocation.as_ptr()),
             }
         }
     }
 
-    unsafe fn dealloc(&self, ptr: *mut Opaque, layout: Layout) {
+    unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
         if let Some(ref mut heap) = *HEAP.lock() {
             heap.deallocate(NonNull::new_unchecked(ptr), layout)
         } else {

src/allocator/slab.rs

@@ -1,4 +1,4 @@
-use alloc::heap::{Alloc, AllocErr, Layout};
+use core::alloc::{Alloc, AllocErr, Layout};
 use spin::Mutex;
 use slab_allocator::Heap;