If CONFIG_PCI disabled then kernel can't compile properly. This is an error: -- LD .tmp_vmlinux1 drivers/built-in.o: In function `pnpacpi_allocated_resource': rsparser.c:(.text+0x31955): undefined reference to `pcibios_penalize_isa_irq' make[1]: *** [.tmp_vmlinux1] Error 1 -- This is a small patch for ./drivers/pnp/pnpacpi/rsparser.c