ext4: use EXT4_BAD_INO for buddy cache to avoid colliding with valid inode #

		ext4_msg(sb, KERN_ERR, "can't get new inode");

		goto err_freesgi;

	}

	sbi->s_buddy_cache->i_ino = get_next_ino();

	/* To avoid potentially colliding with an valid on-disk inode number,

	 * use EXT4_BAD_INO for the buddy cache inode number.  This inode is

	 * not in the inode hash, so it should never be found by iget(), but

	 * this will avoid confusion if it ever shows up during debugging. */

	sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;

	EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;

	for (i = 0; i < ngroups; i++) {

		desc = ext4_get_group_desc(sb, i, NULL);