Fixed build for stable GlobalAllocator

Author: alex

src/allocator.rs

@@ -1,22 +1,22 @@
-use alloc::heap::{AllocErr, GlobalAlloc, Layout, Opaque};
+use core::alloc::{AllocErr, GlobalAlloc, Layout};
 
 use bindings;
 use c_types;
 
 pub struct KernelAllocator;
 
 unsafe impl GlobalAlloc for KernelAllocator {
-    unsafe fn alloc(&self, layout: Layout) -> *mut Opaque {
+    unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
         // krealloc is used instead of kmalloc because kmalloc is an inline function and can't be
         // bound to as a result
         return bindings::krealloc(
             0 as *const c_types::c_void,
             layout.size(),
             bindings::GFP_KERNEL,
-        ) as *mut Opaque;
+        ) as *mut u8;
     }
 
-    unsafe fn dealloc(&self, ptr: *mut Opaque, _layout: Layout) {
+    unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
         bindings::kfree(ptr as *const c_types::c_void);
     }
 }

src/lib.rs

@@ -1,5 +1,5 @@
 #![no_std]
-#![feature(alloc, global_allocator, allocator_api, const_fn, lang_items, panic_implementation)]
+#![feature(alloc, allocator_api, const_fn, lang_items, panic_implementation)]
 
 #[macro_use]
 extern crate alloc;