static void xen_apic_init(APICCommonState *s)
{
- memory_region_init_io(&s->io_memory, NULL, &xen_apic_io_ops, s, "xen-apic-msi",
- APIC_SPACE_SIZE);
+ memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s,
+ "xen-apic-msi", APIC_SPACE_SIZE);
#if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
&& CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420