Copy vmlinuz_hd.vblock only in x86 platform.

build_image

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Script to build a bootable keyfob-based chromeos system image from within
 # a chromiumos setup. This assumes that all needed packages have been built into
 # the given target's root with binary packages turned on. This script will
 # build the Chrome OS image using only pre-built binary packages.
@@ skipping 299 matching lines @@
     --vboot_max_ios=${FLAGS_vboot_max_ios} \
     --vboot_error_behavior=${FLAGS_vboot_behavior} \
     --root=${cros_root} \
     --keys_dir="${DEVKEYSDIR}"
 
   # Move the verification block needed for the hard disk install to the
   # stateful partition. Mount stateful fs, copy file, and umount fs.
   # In original CL: http://codereview.chromium.org/2868044, this was done in
   # create_base_image(). However, it could break the build if it is a clean
   # build because vmlinuz_hd.vblock hasn't been created by build_kernel_image.sh
-  STATEFUL_LOOP_DEV=$(sudo losetup -f)
+  if [[ "${ARCH}" = "x86" ]]; then
+    STATEFUL_LOOP_DEV=$(sudo losetup -f)
     if [ -z "${STATEFUL_LOOP_DEV}" ] ; then
-    echo "No free loop device. Free up a loop device or reboot. exiting. "
-    exit 1
+      echo "No free loop device. Free up a loop device or reboot. exiting. "
+      exit 1
+    fi
+    sudo losetup "${STATEFUL_LOOP_DEV}" "${STATEFUL_FS_IMG}"
+    sudo mount "${STATEFUL_LOOP_DEV}" "${STATEFUL_FS_DIR}"
+    sudo cp "${OUTPUT_DIR}/vmlinuz_hd.vblock" "${STATEFUL_FS_DIR}"
+    sudo umount -d "${STATEFUL_FS_DIR}"
+    STATEFUL_LOOP_DEV=
   fi
-  sudo losetup "${STATEFUL_LOOP_DEV}" "${STATEFUL_FS_IMG}"
-  sudo mount "${STATEFUL_LOOP_DEV}" "${STATEFUL_FS_DIR}"
-  sudo cp "${OUTPUT_DIR}/vmlinuz_hd.vblock" "${STATEFUL_FS_DIR}"
-  sudo umount -d "${STATEFUL_FS_DIR}"
-  STATEFUL_LOOP_DEV=
 
   # START_KERN_A is set by the first call to install the gpt.
   local koffset="$(partoffset ${OUTPUT_DIR}/${image_name} 2)"
   sudo dd if="${OUTPUT_DIR}/vmlinuz.image" of="${OUTPUT_DIR}/${image_name}" \
     conv=notrunc bs=512 seek=${koffset}
 
   # Populate the legacy/efi bootloader partition.
   local kernel_part="--kernel_partition='${OUTPUT_DIR}/vmlinuz.image'"
   local bootloader_to="${ESP_FS_IMG}"
   local usb_disk="${FLAGS_usb_disk}"
@@ skipping 353 matching lines @@
   echo "Developer image created as ${DEVELOPER_IMAGE_NAME}"
 fi
 
 print_time_elapsed
 
 echo "To copy to USB keyfob, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_usb.sh --from=${OUTSIDE_OUTPUT_DIR} --to=/dev/sdX"
 echo "To convert to VMWare image, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_vmware.sh --from=${OUTSIDE_OUTPUT_DIR}"
 echo "from the scripts directory where you entered the chroot."