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

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

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

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