UBI_FM_VHDR_MAGIC
fvh->magic = cpu_to_be32(UBI_FM_VHDR_MAGIC);
if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) {
be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC);