diff --git a/src/include/kernel/kernel.h b/src/include/kernel/kernel.h
index 5ed0bda..b3c645c 100644
--- a/src/include/kernel/kernel.h
+++ b/src/include/kernel/kernel.h
@@ -7,7 +7,7 @@
 
 #include <kernel/arch/x86_64/kernel.h>
 
-#define ISA_STRING "x86_64"
+#define ISA_NAME "x86_64"
 
 #endif
 
diff --git a/src/kernel/arch/x86_64/memm_x86_64.c b/src/kernel/arch/x86_64/memm_x86_64.c
index 2eeec75..6112c03 100644
--- a/src/kernel/arch/x86_64/memm_x86_64.c
+++ b/src/kernel/arch/x86_64/memm_x86_64.c
@@ -123,8 +123,8 @@ bool memm_map_pageframes_to(
         }
 
         map_pageframe_to(target, physical, user, write, align);
-        usize step = min(size, (usize)align * MEMM_PAGE_SIZE);
 
+        usize step = min(size, (usize)align * MEMM_PAGE_SIZE);
         size -= step;
         target += step;
         physical += step;
diff --git a/src/kernel/main.c b/src/kernel/main.c
index 9eda2e9..9da9895 100644
--- a/src/kernel/main.c
+++ b/src/kernel/main.c
@@ -65,7 +65,7 @@ void get_frame_buffer_with_bootinfo(framebuffer *fb, bootinfo_t *bootinfo)
     fb->width = fbinfo->framebuffer_width;
     fb->height = fbinfo->framebuffer_height;
     fb->pixsize = fbinfo->framebuffer_bpp / 8;
-    fb->pixtype = rgb;
+    fb->pixtype = rgb; // 绝大多数显示器配置都是rgb，不需要特意判断
     memm_map_pageframes_to(
         (u64)fb->pointer, (u64)fb->pointer,
         fb->width * fb->height * fb->pixsize,