diff --git a/kernel/liteos_m/arch/arm/cortex-m/cortex-m4/los_dispatch_gcc.S b/kernel/liteos_m/arch/arm/cortex-m/cortex-m4/los_dispatch_gcc.S
index f5e8495cacf9ca7c8099924646df2e438898caf1..bb8156683dc22b0732dc5bed70dd224c6ac0d6f0 100644
--- a/kernel/liteos_m/arch/arm/cortex-m/cortex-m4/los_dispatch_gcc.S
+++ b/kernel/liteos_m/arch/arm/cortex-m/cortex-m4/los_dispatch_gcc.S
@@ -128,6 +128,7 @@ LOS_IntRestore:
 
     .type osTaskSchedule, %function
     .global osTaskSchedule
+;进程调度函数，设置pendsv中断
 osTaskSchedule:
     .fnstart
     .cantunwind
@@ -140,7 +141,7 @@ osTaskSchedule:
 
 
 
-
+;pendsv中断处理函数
     .type osPendSV, %function
     .global osPendSV
 osPendSV:
@@ -157,6 +158,7 @@ osPendSV:
     blx     r2
     pop     {r12, lr}
 
+;进程切换函数
 TaskSwitch:
 
     mrs     r0, psp