busmap 122 arch/x86/pci/irq.c u8 busmap[256]; busmap 126 arch/x86/pci/irq.c memset(busmap, 0, sizeof(busmap)); busmap 138 arch/x86/pci/irq.c busmap[e->bus] = 1; busmap 141 arch/x86/pci/irq.c if (!busmap[i] || pci_find_bus(0, i))