Update to crossbeam-queue v0.3.11

Cargo.toml

@@ -27,7 +27,7 @@ version = "1.0"
 features = ["spin_no_std"]
 
 [dependencies.crossbeam-queue]
-version = "0.2.1"
+version = "0.3.11"
 default-features = false
 features = ["alloc"]
 

src/task/executor.rs

@@ -41,7 +41,7 @@ impl Executor {
             waker_cache,
         } = self;
 
-        while let Ok(task_id) = task_queue.pop() {
+        while let Some(task_id) = task_queue.pop() {
             let task = match tasks.get_mut(&task_id) {
                 Some(task) => task,
                 None => continue, // task no longer exists

src/task/keyboard.rs

@@ -51,17 +51,17 @@ impl Stream for ScancodeStream {
             .expect("scancode queue not initialized");
 
         // fast path
-        if let Ok(scancode) = queue.pop() {
+        if let Some(scancode) = queue.pop() {
             return Poll::Ready(Some(scancode));
         }
 
         WAKER.register(&cx.waker());
         match queue.pop() {
-            Ok(scancode) => {
+            Some(scancode) => {
                 WAKER.take();
                 Poll::Ready(Some(scancode))
             }
-            Err(crossbeam_queue::PopError) => Poll::Pending,
+            None => Poll::Pending,
         }
     }
 }