pci_is_root_bus    32 include/linux/pci-acpi.h 	while (!pci_is_root_bus(pbus))
pci_is_root_bus    42 include/linux/pci-acpi.h 	if (pci_is_root_bus(pbus))
pci_is_root_bus   509 include/linux/pci.h 	if (pci_is_root_bus(dev->bus))