ifndef KERNELRELEASE PWD := $(shell pwd) all: $(MAKE) -C $(KERNELDIR) SUBDIRS=$(PWD) modules clean: rm -f *.o *.ko *.mod.* .*.cmd Module.symvers rm -rf .tmp_versions install: $(MAKE) -C $(KERNELDIR) SUBDIRS=$(PWD) modules_install else obj-m := udlfb.o endif