内核定时器API之timer_setup

最近在写一个测试驱动demo，发现以前用的init_timer用不了了，后面发现现在新的内核都用timer_setup()了，特此记录

从4.14 Linux内核开始使用带有三个args的timer_setup()：

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
    init_timer(&dev->getIntrTimer);
    dev->getIntrTimer.data = (unsigned long) dev;
    dev->getIntrTimer.function = GetIntrTimerCallback;
    /* ... */
    add_timer(&dev->getIntrTimer);
#else
    timer_setup(&dev->getIntrTimer, GetIntrTimerCallback, 0);
    /* the third argument may include TIMER_* flags */
    /* ... */
#endif

//回调函数:
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
void GetIntrTimerCallback(unsigned long devAddr)
{
    myDevice *dev = (myDevice *) devAddr;
#else
void GetIntrTimerCallback(struct timer_list *t)
{
    myDevice *dev = from_timer(dev, t, getIntrTimer);
#endif
    /* Do something with "dev" */