static void write_ecryptfs_marker(char *page_virt, size_t *written)
{
	u32 m_1, m_2;

	get_random_bytes(&m_1, (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2));
	m_2 = (m_1 ^ MAGIC_ECRYPTFS_MARKER);
	put_unaligned_be32(m_1, page_virt);
	page_virt += (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2);
	put_unaligned_be32(m_2, page_virt);
	(*written) = MAGIC_ECRYPTFS_MARKER_SIZE_BYTES;
}