驱动模块编译报错Error: selected processor does not support `isb ' in ARM mode

[dql2016]

我想把这个编译成模块https://v853.docs.aw-ol.com/soft/dev_gpio/
写了Makefile文件

CROSS_COMPILE := arm-openwrt-linux-
CC := $(CROSS_COMPILE)gcc
LD := $(CROSS_COMPILE)ld
KERNELDIR := /home/allwinner/tina-v853/kernel/linux-4.9
CURRENT_PATH := $(shell pwd)
ARCH := arm

obj-m := led.o

build: kernel_modules

kernel_modules:
	$(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) modules ARCH=$(ARCH)

clean:
	$(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) clean

但是编译报错了

allwinner@allwinner-VirtualBox:~/nfsroot$ make
make -C /home/allwinner/tina-v853/kernel/linux-4.9 M=/home/allwinner/nfsroot modules ARCH=arm
make[1]: Entering directory '/home/allwinner/tina-v853/kernel/linux-4.9'
  CC [M]  /home/allwinner/nfsroot/led.o
/tmp/ccvV4lGB.s: Assembler messages:
/tmp/ccvV4lGB.s:105: Error: selected processor does not support `isb ' in ARM mode
/tmp/ccvV4lGB.s:118: Error: selected processor does not support `isb ' in ARM mode
make[2]: *** [scripts/Makefile.build:341: /home/allwinner/nfsroot/led.o] Error 1
make[1]: *** [Makefile:1617: _module_/home/allwinner/nfsroot] Error 2
make[1]: Leaving directory '/home/allwinner/tina-v853/kernel/linux-4.9'
make: *** [Makefile:13: kernel_modules] Error 2

[YuzukiTsuru]

感觉CFLAGS缺失了