diff --git a/package/uboot-xburst/files/drivers/mmc/jz_mmc.c b/package/uboot-xburst/files/drivers/mmc/jz_mmc.c
index 18352ddc8..72b448af8 100644
--- a/package/uboot-xburst/files/drivers/mmc/jz_mmc.c
+++ b/package/uboot-xburst/files/drivers/mmc/jz_mmc.c
@@ -29,9 +29,7 @@
 #include <asm/jz4740.h>
 #include "jz_mmc.h"
 
-#define CFG_MMC_BASE		0x80600000
 static int sd2_0 = 0;
-static uchar mmc_buf[1024];
 static int mmc_ready = 0;
 static int use_4bit;		/* Use 4-bit data bus */
 /*
diff --git a/scripts/build b/scripts/build
index a51acf097..b6c16f773 100755
--- a/scripts/build
+++ b/scripts/build
@@ -32,8 +32,9 @@ if [ -f "config" ]; then
 fi
 
 echo "This script will move previous builds to bak/!"
-echo "This script will reset modifications you made"
-echo "  to files which are part of the repository!"
+echo "This script will compile base on last commit"
+echo "  your  modifications will backup by git stash"
+echo "  those modifications will apply again after compile"
 echo "This script comes without any kind of warranty!"
 echo " "
 echo "Are you brave, dude? [NO/yes]"
@@ -58,8 +59,7 @@ mv .config config
 mkdir xburst
 
 echo "updating git repo..."
-git diff > bak/modify_${DATE_TIME}.patch
-git checkout -f
+git stash
 git checkout tracking_backfire
 git pull > /dev/null
 if [ "$?" != "0" ]; then
@@ -122,6 +122,8 @@ if [ "$?" != "0" ]; then
 	exit 1
 fi
 
+git stash pop
+
 cp .config xburst/config
 cp bin/xburst/* xburst/ 2>/dev/null
 mkdir xburst/files