drbd_suspend_io
extern void drbd_suspend_io(struct drbd_device *device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device);
drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */