host_b            328 drivers/pci/p2pdma.c 	struct pci_host_bridge *host_b = pci_find_host_bridge(b->bus);
host_b            330 drivers/pci/p2pdma.c 	if (host_a == host_b)
host_b            334 drivers/pci/p2pdma.c 	    __host_bridge_whitelist(host_b, false))