if export_partdevice partdev 1; then
mkdir -p /boot
- [ -f "/boot/kernel*.img" ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot
+ [ -f /boot/kernel*.img ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot
cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE"
tar -C / -zxvf "$UPGRADE_BACKUP" boot/cmdline.txt boot/config.txt
sync