152                 e->dz--;  in hid_pointer_event()
154                 e->dz++;  in hid_pointer_event()
209         prev->dz += curr->dz;  in hid_pointer_sync()
210         curr->dz = 0;  in hid_pointer_sync()
220         next->dz = 0;  in hid_pointer_sync()
360     int dx, dy, dz, l;  in hid_pointer_poll()  local
382     dz = int_clamp(e->dz, -127, 127);  in hid_pointer_poll()
383     e->dz -= dz;  in hid_pointer_poll()
386         !e->dz &&  in hid_pointer_poll()
394     dz = 0 - dz;  in hid_pointer_poll()
408             buf[l++] = dz;  in hid_pointer_poll()
429             buf[l++] = dz;  in hid_pointer_poll()
587         VMSTATE_INT32(dz, HIDPointerEvent),