1 files changed, 6 insertions, 2 deletions
diff --git a/src/osal/osal_rtthread.h b/src/osal/osal_rtthread.h
index 97f5dc69a..a778f5425 100644
--- a/src/osal/osal_rtthread.h
+++ b/src/osal/osal_rtthread.h
@@ -55,12 +55,16 @@ TU_ATTR_ALWAYS_INLINE static inline void osal_spin_init(osal_spinlock_t *ctx) {
 }
 
 TU_ATTR_ALWAYS_INLINE static inline void osal_spin_lock(osal_spinlock_t *ctx, bool in_isr) {
-  (void) in_isr;
+  if (!TUP_MCU_MULTIPLE_CORE && in_isr) {
+    return; // single core MCU does not need to lock in ISR
+  }
   rt_spin_lock(ctx);
 }
 
 TU_ATTR_ALWAYS_INLINE static inline void osal_spin_unlock(osal_spinlock_t *ctx, bool in_isr) {
-  (void) in_isr;
+  if (!TUP_MCU_MULTIPLE_CORE && in_isr) {
+    return; // single core MCU does not need to lock in ISR
+  }
   rt_spin_unlock(ctx);
 }