Hello, module world !

Hello, module world ! Nice to meet you !

insert module with following command at console:
   insmod hello.ko
  insmod hello.ko whom="Mom" times=5

remove module with below command:
  rmmod hello

View the hello messages with command:
  dmesg | tail -5

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

MODULE_LICENSE("Dual BSD/GPL");

static char *whom = "world!";
static int times = 1;

module_param(whom, charp, S_IRUGO);
module_param(times, int, S_IRUGO);


static int hello_init(void)
{
    do {
        printk(KERN_ALERT "Hello, %s\n", whom);
    } while (--times);
    return 0;
}


static void hello_exit(void)
{
    printk(KERN_ALERT "Goodbye, cruel module world\n");
}


module_init(hello_init);
module_exit(hello_exit);


Makefile content:

ifneq ($(KERNELRELEASE),)
    obj-m := hello.o
else
    KERNELDIR ?= /lib/modules/$(shell uname -r)/build
    PWD := $(shell pwd)
default:
    $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
endif