Linux Driver: Example0

main.c

#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");

static int __init init_modules(void)
{
	printk("hello world\n");
	return 0;
}

static void __exit exit_modules(void)
{
	printk("goodbye\n");
}

module_init(init_modules);
module_exit(exit_modules);

Makefile

mname := brook
$(mname)-objs := main.o
obj-m := $(mname).o

KERNELDIR := /lib/modules/`uname -r`/build

all:
	$(MAKE) -C $(KERNELDIR) M=`pwd` modules

clean:
	$(MAKE) -C $(KERNELDIR) M=`pwd` clean