hpwdt_pretimeout
retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout, 0, "hpwdt");
retval = register_nmi_handler(NMI_SERR, hpwdt_pretimeout, 0, "hpwdt");
retval = register_nmi_handler(NMI_IO_CHECK, hpwdt_pretimeout, 0, "hpwdt");