Simple Module

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
 
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Bill Gates");
 
static int simple_param;
module_param(simple_param,int,0);
 
static int simple_init1(void)
{
    printk(KERN_ALERT "hello, all %d\n", simple_param);
    return 0;
}
 
static void simple_cleanup1(void)
{
    printk(KERN_ALERT "bye all...\n");
}
 
module_init(simple_init1);
module_exit(simple_cleanup1);

Use a simple Makefile to compile the module
To load it with parameter:

# insmod simple.ko simple_param=26