arc_fw_hdr
bufhdr->hdr = arc_fw_hdr;
if (memcmp(&bufhdr->hdr, &arc_fw_hdr, sizeof(bufhdr->hdr)) != 0) {
struct arc_fw_hdr arc_fw_hdr = { 0x5e, 0x01, 0x61 };
struct arc_fw_hdr hdr;