diff --git a/core/Makefile b/core/Makefile
index ece5cd4..b1f9484 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -733,8 +733,6 @@
 $(if $(BOARD_SYSTEMIMAGE_PARTITION_SIZE),$(hide) echo "system_size=$(BOARD_SYSTEMIMAGE_PARTITION_SIZE)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "system_fs_type=$(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_JOURNAL_SIZE),$(hide) echo "system_journal_size=$(BOARD_SYSTEMIMAGE_JOURNAL_SIZE)" >> $(1))
-$(if $(BOARD_HAS_EXT4_RESERVED_BLOCKS),$(hide) echo "has_ext4_reserved_blocks=$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" >> $(1))
-$(if $(BOARD_FLASH_BLOCK_SIZE),$(hide) echo "blocksize=$(BOARD_FLASH_BLOCK_SIZE)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR),$(hide) echo "system_squashfs_compressor=$(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR)" >> $(1))
 $(if $(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR_OPT),$(hide) echo "system_squashfs_compressor_opt=$(BOARD_SYSTEMIMAGE_SQUASHFS_COMPRESSOR_OPT)" >> $(1))
 $(if $(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "userdata_fs_type=$(BOARD_USERDATAIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
@@ -999,15 +997,7 @@
       $(TARGET_OUT) $(systemimage_intermediates)/system_image_info.txt $(1) \
       || ( echo "Out of space? the tree size of $(TARGET_OUT) is (MB): " 1>&2 ;\
            du -sm $(TARGET_OUT) 1>&2;\
-           if [ "$(INTERNAL_USERIMAGES_EXT_VARIANT)" == "ext4" ]; then \
-               maxsize=$(BOARD_SYSTEMIMAGE_PARTITION_SIZE); \
-               if [ "$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" == "true" ]; then \
-                   maxsize=$$((maxsize - 4096 * 4096)); \
-               fi; \
-               echo "The max is $$(( maxsize / 1048576 )) MB." 1>&2 ;\
-           else \
-               echo "The max is $$(( $(BOARD_SYSTEMIMAGE_PARTITION_SIZE) / 1048576 )) MB." 1>&2 ;\
-           fi; \
+           echo "The max is $$(( $(BOARD_SYSTEMIMAGE_PARTITION_SIZE) / 1048576 )) MB." 1>&2 ;\
            mkdir -p $(DIST_DIR); cp $(INSTALLED_FILES_FILE) $(DIST_DIR)/installed-files-rescued.txt; \
            exit 1 )
 endef
@@ -1490,9 +1480,6 @@
 ifdef BOARD_RECOVERYIMAGE_PARTITION_SIZE
 	$(hide) echo "recovery_size=$(BOARD_RECOVERYIMAGE_PARTITION_SIZE)" >> $(zip_root)/META/misc_info.txt
 endif
-ifdef BOARD_HAS_EXT4_RESERVED_BLOCKS
-	$(hide) echo "has_ext4_reserved_blocks=$(BOARD_HAS_EXT4_RESERVED_BLOCKS)" >> $(zip_root)/META/misc_info.txt
-endif
 ifdef TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS
 	@# TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS can be empty to indicate that nothing but defaults should be used.
 	$(hide) echo "recovery_mount_options=$(TARGET_RECOVERY_FSTYPE_MOUNT_OPTIONS)" >> $(zip_root)/META/misc_info.txt
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 7c271a2..6a77a8f 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -255,22 +255,6 @@
     prop_dict["partition_size"] = str(adjusted_size)
     prop_dict["original_partition_size"] = str(partition_size)
 
-  # Bug: 21522719, 22023465
-  # There are some reserved blocks on ext4 FS (lesser of 4096 blocks and 2%).
-  # We need to deduct those blocks from the available space, since they are
-  # not writable even with root privilege. It only affects devices using
-  # file-based OTA and a kernel version of 3.10 or greater (currently just
-  # sprout).
-  reserved_blocks = prop_dict.get("has_ext4_reserved_blocks") == "true"
-  if reserved_blocks and fs_type.startswith("ext4"):
-    partition_size = int(prop_dict.get("partition_size"))
-    block_size = int(prop_dict.get("blocksize"))
-    reserved_size = min(4096 * block_size, int(partition_size * 0.02))
-    adjusted_size = partition_size - reserved_size
-    if not prop_dict.has_key("original_partition_size"):
-      prop_dict["original_partition_size"] = str(partition_size)
-    prop_dict["partition_size"] = str(adjusted_size)
-
   if fs_type.startswith("ext"):
     build_command = ["mkuserimg.sh"]
     if "extfs_sparse_flag" in prop_dict:
@@ -407,8 +391,6 @@
     copy_prop("system_verity_block_device", "verity_block_device")
     copy_prop("system_root_image", "system_root_image")
     copy_prop("ramdisk_dir", "ramdisk_dir")
-    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
-    copy_prop("blocksize", "blocksize")
     copy_prop("system_squashfs_compressor", "squashfs_compressor")
     copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
   elif mount_point == "data":
@@ -424,14 +406,10 @@
     copy_prop("vendor_size", "partition_size")
     copy_prop("vendor_journal_size", "journal_size")
     copy_prop("vendor_verity_block_device", "verity_block_device")
-    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
-    copy_prop("blocksize", "blocksize")
   elif mount_point == "oem":
     copy_prop("fs_type", "fs_type")
     copy_prop("oem_size", "partition_size")
     copy_prop("oem_journal_size", "journal_size")
-    copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")
-    copy_prop("blocksize", "blocksize")
 
   return d