Changed visibility of get_block_device_size

Change-Id: I5d27f5f50275017134a48eed8d89e452353777f1
diff --git a/ext4_utils/ext4_utils.c b/ext4_utils/ext4_utils.c
index c3bec96..d4fbc7c 100644
--- a/ext4_utils/ext4_utils.c
+++ b/ext4_utils/ext4_utils.c
@@ -388,7 +388,7 @@
 	}
 }
 
-static u64 get_block_device_size(int fd)
+u64 get_block_device_size(int fd)
 {
 	u64 size = 0;
 	int ret;
diff --git a/ext4_utils/ext4_utils.h b/ext4_utils/ext4_utils.h
index 0a9bd56..adc7d9e 100644
--- a/ext4_utils/ext4_utils.h
+++ b/ext4_utils/ext4_utils.h
@@ -174,6 +174,7 @@
 void ext4_create_journal_inode(void);
 void ext4_update_free(void);
 void ext4_queue_sb(void);
+u64 get_block_device_size(int fd);
 u64 get_file_size(int fd);
 u64 parse_num(const char *arg);
 void ext4_parse_sb(struct ext4_super_block *sb);