linux驱动模块

obj-m = hello.o

KERNALPATH = /home/3.8.13

CC = /home/gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux/bin/arm-linux-gnueabihf-gcc
LD = /home/gcc-linaro-arm-linux-gnueabihf-4.7-2013.03-20130313_linux/bin/arm-linux-gnueabihf-ld
export ARCH=arm

all:

make -C $(KERNALPATH) M=$(shell pwd) modules

#include <linux/init.h>
#include <linux/module.h>

static int hello_init(void){
printk(KERN_ALERT "hello,world\n");
return 0;
}

static void hello_exit(void){
printk(KERN_ALERT "goodbye,cruel world\n");
return 0;
}

MODULE_LICENSE("Dual BSD/GPL");
module_init(hello_init);
module_exit(hello_exit);