https://twitter.com/jessfraz/status/917850864018165761

dmesg_rick.c

#include <linux/hrtimer.h>
#include <linux/module.h>
#include <linux/kernel.h>

static struct hrtimer timer;

enum hrtimer_restart yell_rick( struct hrtimer *timer )
{
        ktime_t time;
        printk(KERN_INFO "I turned myself into a logger morty! I'm dmesg RIIIICK!\n");

        time = ktime_set(0, 1E9L);
        hrtimer_forward_now(timer, time);
 
        return HRTIMER_RESTART;
}

static int __init init_rick(void)
{
        ktime_t time;

        printk(KERN_INFO "morty! Morty! MORRRTY!\n");
        time = ktime_set(0, 1E9L);
        hrtimer_init(&timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
        timer.function = yell_rick;
        hrtimer_start(&timer, time, HRTIMER_MODE_REL);

        return 0;
}

static void __exit exit_rick(void)
{
        hrtimer_cancel(&timer);
        printk(KERN_INFO "This is the mega-genius equivalent of dying on the toilet.\n");
}

MODULE_LICENSE("Dual MIT/GPL");

module_init(init_rick);
module_exit(exit_rick);