/* hello-mod.c
 *
 * Load and unload a module that does nothing but acknowledge
 *   init_module     at insmod and
 *   cleanup_module  at rmmod.
 * 
 * Code from Linux Kernel Module Programmer's Guide  (hello-1.c)
 */

#include <linux/module.h>       /* for module programming */
#include <linux/kernel.h>       /* for KERN_ALERT in printk */

/* Deal with CONFIG_MODVERSIONS */
#if CONFIG_MODVERSIONS==1
#define MODVERSIONS
#include <linux/modversions.h>
#endif


/* No main, kernel modules are loaded with insmod and unloaded with rmmod */

/* Prototypes */
int init_module(void);
void cleanup_module(void);

/* Module init at insmod */
int init_module(void)
{
  printk("<1>hello-mod: Hello world.\n");
  return 0;  /* non 0 means init_module failed; module can't be loaded */
}

/* Module cleanup at rmmod */
void cleanup_module(void)
{
  printk(KERN_ALERT "hello-mod: Goodby world.\n");
}