Remove unused WakeupReason

src/scheduler/mod.rs

@@ -297,16 +297,6 @@ impl PerCoreScheduler {
 		irqsave(|| self.current_task.borrow().prio)
 	}
 
-	#[inline]
-	pub fn get_current_task_wakeup_reason(&self) -> WakeupReason {
-		irqsave(|| self.current_task.borrow_mut().last_wakeup_reason)
-	}
-
-	#[inline]
-	pub fn set_current_task_wakeup_reason(&mut self, reason: WakeupReason) {
-		irqsave(|| self.current_task.borrow_mut().last_wakeup_reason = reason);
-	}
-
 	#[cfg(target_arch = "x86_64")]
 	#[inline]
 	pub fn get_current_kernel_stack(&self) -> VirtAddr {

src/scheduler/task.rs

@@ -35,13 +35,6 @@ pub enum TaskStatus {
 	Idle,
 }
 
-/// Reason why wakeup() has been called on a task.
-#[derive(Clone, Copy, PartialEq)]
-pub enum WakeupReason {
-	Custom,
-	Timer,
-}
-
 /// Unique identifier for a task (i.e. `pid`).
 #[derive(PartialEq, Eq, PartialOrd, Ord, Debug, Clone, Copy)]
 pub struct TaskId(u32);
@@ -365,8 +358,6 @@ pub struct Task {
 	pub prev: Option<Rc<RefCell<Task>>>,
 	/// Task Thread-Local-Storage (TLS)
 	pub tls: Option<TaskTLS>,
-	/// Reason why wakeup() has been called the last time
-	pub last_wakeup_reason: WakeupReason,
 	/// lwIP error code for this task
 	#[cfg(feature = "newlib")]
 	pub lwip_errno: i32,
@@ -399,7 +390,6 @@ impl Task {
 			next: None,
 			prev: None,
 			tls: None,
-			last_wakeup_reason: WakeupReason::Custom,
 			#[cfg(feature = "newlib")]
 			lwip_errno: 0,
 		}
@@ -420,7 +410,6 @@ impl Task {
 			next: None,
 			prev: None,
 			tls: None,
-			last_wakeup_reason: WakeupReason::Custom,
 			#[cfg(feature = "newlib")]
 			lwip_errno: 0,
 		}
@@ -445,7 +434,6 @@ impl Task {
 			next: None,
 			prev: None,
 			tls: None,
-			last_wakeup_reason: task.last_wakeup_reason,
 			#[cfg(feature = "newlib")]
 			lwip_errno: 0,
 		}
@@ -480,7 +468,7 @@ impl BlockedTaskQueue {
 		}
 	}
 
-	fn wakeup_task(task: Rc<RefCell<Task>>, reason: WakeupReason) {
+	fn wakeup_task(task: Rc<RefCell<Task>>) {
 		{
 			let mut borrowed = task.borrow_mut();
 			debug!(
@@ -502,7 +490,6 @@ impl BlockedTaskQueue {
 				borrowed.id
 			);
 			borrowed.status = TaskStatus::Ready;
-			borrowed.last_wakeup_reason = reason;
 		}
 
 		// Add the task to the ready queue.
@@ -563,7 +550,7 @@ impl BlockedTaskQueue {
 		while let Some(node) = cursor.current() {
 			if node.task.borrow().id == task.get_id() {
 				// Remove it from the list of blocked tasks and wake it up.
-				Self::wakeup_task(node.task.clone(), WakeupReason::Custom);
+				Self::wakeup_task(node.task.clone());
 				cursor.remove_current();
 
 				// If this is the first task, adjust the One-Shot Timer to fire at the
@@ -607,7 +594,7 @@ impl BlockedTaskQueue {
 			}
 
 			// Otherwise, this task has elapsed, so remove it from the list and wake it up.
-			Self::wakeup_task(node.task.clone(), WakeupReason::Timer);
+			Self::wakeup_task(node.task.clone());
 			cursor.remove_current();
 		}
 	}

src/synch/semaphore.rs

 use crate::arch::percore::*;
-use crate::scheduler::task::{TaskHandlePriorityQueue, WakeupReason};
+use crate::scheduler::task::TaskHandlePriorityQueue;
 use crate::synch::spinlock::SpinlockIrqSave;
 use crossbeam_utils::Backoff;
 
@@ -68,9 +68,7 @@ impl Semaphore {
 	/// least 1.
 	pub fn acquire(&self, time: Option<u64>) -> bool {
 		let backoff = Backoff::new();
-		// Reset last_wakeup_reason.
 		let core_scheduler = core_scheduler();
-		core_scheduler.set_current_task_wakeup_reason(WakeupReason::Custom);
 
 		let wakeup_time = time.map(|ms| crate::arch::processor::get_timer_ticks() + ms * 1000);