pci_host_bridge_acpi_msi_domain  786 drivers/pci/probe.c 		d = pci_host_bridge_acpi_msi_domain(bus);
pci_host_bridge_acpi_msi_domain 2309 include/linux/pci.h struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);