diff --git a/Software/Development/OperatingSystem/Linux/Kernel/Modules/DeviceTree/DeviceTree.md b/Software/Development/OperatingSystem/Linux/Kernel/Modules/DeviceTree/DeviceTree.md
index 9cafa43..76798eb 100644
--- a/Software/Development/OperatingSystem/Linux/Kernel/Modules/DeviceTree/DeviceTree.md
+++ b/Software/Development/OperatingSystem/Linux/Kernel/Modules/DeviceTree/DeviceTree.md
@@ -238,7 +238,7 @@ IPI、PPI、SPI、SGI 是 ARM 规范的中断，含义如下:
 * SPI：shared processor interrupts  中断号 32 ～32+224
 * SGI：software generated interrupts (SGI).
 
-中断类型的值如下：
+中断类型的值在 \<linux kernel source\>/include/irq.h 中，部分定义如下：
 
 ```cpp
 #define IRQ_TYPE_NONE           0