sizeof_idt
if (!sizeof_idt(idt))
if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt))
if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) {
nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt),
memcpy(nfit_idt->idt, idt, sizeof_idt(idt));