diff --git a/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/core/los_bitmap.c b/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/core/los_bitmap.c
index 4e8b8600..954a66fc 100644
--- a/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/core/los_bitmap.c
+++ b/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/core/los_bitmap.c
@@ -38,6 +38,7 @@
 #define OS_BITMAP_WORD_MASK ~0UL
 
 /* find first zero bit starting from LSB */
+//这段代码的功能与位图操作有关，可能是用于设置、清除或检查位图中特定位置的状态或标志
 STATIC INLINE UINT16 Ffz(UINTPTR x)
 {
     return __builtin_ffsl(~x) - 1;