hello-1.c
/*
 * hello−1.c − The simplest kernel module.
 */
 
#include <linux/module.h>       /* Needed by all modules */
#include <linux/kernel.h>       /* Needed for KERN_INFO */
 
int init_module(void)
{
        printk(KERN_INFO "Hello world 1.\n");
        /*
         * A non 0 return means init_module failed; module can't be loaded.
         */
        return 0;
}
 
void cleanup_module(void)
{
        printk(KERN_INFO "Goodbye world 1.\n");
}
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