s = (m5206_mbar_state *)g_malloc0(sizeof(m5206_mbar_state));
- memory_region_init_io(&s->iomem, &m5206_mbar_ops, s,
+ memory_region_init_io(&s->iomem, NULL, &m5206_mbar_ops, s,
"mbar", 0x00001000);
memory_region_add_subregion(sysmem, base, &s->iomem);