From 96efd620072a0cbdccc95b58901894111f17bb3a Mon Sep 17 00:00:00 2001
From: Ruihan Li <lrh2000@pku.edu.cn>
Date: Thu, 3 Oct 2024 23:10:27 +0800
Subject: [PATCH] Use `LocalIrqDisable` in `Subject`

---
 kernel/src/events/subject.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/src/events/subject.rs b/kernel/src/events/subject.rs
index a547ea476..8628dda69 100644
--- a/kernel/src/events/subject.rs
+++ b/kernel/src/events/subject.rs
@@ -3,6 +3,7 @@
 use core::sync::atomic::{AtomicUsize, Ordering};
 
 use keyable_arc::KeyableWeak;
+use ostd::sync::LocalIrqDisabled;
 
 use super::{Events, EventsFilter, Observer};
 use crate::prelude::*;
@@ -10,7 +11,7 @@ use crate::prelude::*;
 /// A Subject notifies interesting events to registered observers.
 pub struct Subject<E: Events, F: EventsFilter<E> = ()> {
     // A table that maintains all interesting observers.
-    observers: SpinLock<BTreeMap<KeyableWeak<dyn Observer<E>>, F>>,
+    observers: SpinLock<BTreeMap<KeyableWeak<dyn Observer<E>>, F>, LocalIrqDisabled>,
     // To reduce lock contentions, we maintain a counter for the size of the table
     num_observers: AtomicUsize,
 }