pci_host_bridge_acpi_msi_domain 1320 drivers/pci/pci-acpi.c struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) pci_host_bridge_acpi_msi_domain 2316 include/linux/pci.h pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }