Questions

1. Spot the bug(s) in the following pseudocode:

static my_chip_tasklet(void)
{
    // ... process data
    if (!copy_to_user(to, from, count)) {
        pr_warn("..."); [...]
    }
}
static irqreturn_t chip_hardisr(int irq, void *data)
{
    // ack irq
    // << ... fetch data into kfifo ... >>
    // << ... call func_a(), delay, then call func_b() >>
    func_a();
    usleep(100); // 100 us delay required here! see datasheet pg ...
    func_b();
    tasklet_schedule(...);
    return IRQ_HANDLED;
}
my_chip_probe(...)
{
    // ...
    request_irq(CHIP_IRQ, chip_hardisr, ...);
    // ...
    tasklet_init(...);
}

2. timer_simple_check: Enhance the timer_simple kernel module so that it checks the amount of time that elapsed between setting up a timeout and it actually being serviced.
3. kclock: Write a kernel module that sets up a kernel timer so that it times out every second. Then, use this to print the timestamp to the kernel log to get, in effect, a simple "clock app...