obj-m += hello-world.o 
PWD := $(CURDIR) 

all: 
	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules 

inst: all
	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules_install

clean: 
	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

.PHONY: all clean inst