ifneq ($(KERNELRELEASE),) 
obj-m := mmap.o

else
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

default:
    $(MAKE) -C $(KDIR) M=$(PWD) modules
endif

clean:
    rm -rf *.ko *.o *.mod.c .*.cmd .tmp_versions Module.symvers