really newbie: compiling a module

[Gergely Buday <gbuday@xxxxxxxxx>]

Dear kernel experts,

I try to compile a module from Linux Device Drivers, 3rd edition:

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

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");
}

module_init(hello_init);
module_exit(hello_exit);
---

I got a makefile from

http://www.tldp.org/LDP/lkmpg/2.6/html/x181.html

namely

obj-m += helloworld.o

all:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

but that does not work on my system. What makefile should I use and
where should I put my helloworld.c?

Best Wishes

- Gergely

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