From f646d9c8f9d955b6f9323225beeeadd11eaeb788 Mon Sep 17 00:00:00 2001
From: Michael Scire <SciresM@gmail.com>
Date: Wed, 28 May 2025 10:44:31 -0700
Subject: [PATCH] kern: use KLightLock for KCoreBarrierInterruptHandler

---
 libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp b/libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
index 657af7f52..401a4d4d7 100644
--- a/libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
+++ b/libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
@@ -112,7 +112,7 @@ namespace ams::kern::arch::arm64::cpu {
         class KCoreBarrierInterruptHandler : public KInterruptHandler {
             private:
                 util::Atomic<u64> m_target_cores;
-                KSpinLock m_lock;
+                KLightLock m_lock;
             public:
                 constexpr KCoreBarrierInterruptHandler() : KInterruptHandler(), m_target_cores(0), m_lock() { /* ... */ }
 
@@ -123,11 +123,8 @@ namespace ams::kern::arch::arm64::cpu {
                 }
 
                 void SynchronizeCores(u64 core_mask) {
-                    /* Disable dispatch while we synchronize. */
-                    KScopedDisableDispatch dd;
-
                     /* Acquire exclusive access to ourselves. */
-                    KScopedSpinLock lk(m_lock);
+                    KScopedLightLock lk(m_lock);
 
                     /* If necessary, force synchronization with other cores. */
                     if (const u64 other_cores_mask = core_mask & ~(1ul << GetCurrentCoreId()); other_cores_mask != 0) {