s->contents = g_malloc0(s->chip_size);
- memory_region_init_io(&s->iomem, &nvram_ops, s, "nvram", s->chip_size);
+ memory_region_init_io(&s->iomem, NULL, &nvram_ops, s, "nvram", s->chip_size);
sysbus_init_mmio(dev, &s->iomem);
/* Read current file */