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

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

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

 clean:
       rm -rf .*.cmd *.mod.o modules.order Module.symvers
       rm -rf *.o .*.dwo *.ko *.mod.c