mem_timer
timer_setup(&dev->mem_timer, mem_timer, 0);
timer_delete_sync(&dev->mem_timer);
struct hfi1_ibdev *dev = timer_container_of(dev, t, mem_timer);
mod_timer(&dev->mem_timer, jiffies + 1);
mod_timer(&dev->mem_timer, jiffies + 1);
struct timer_list mem_timer;