GET_RING_HEAD     213 drivers/gpu/drm/r128/r128_cce.c 		if (GET_RING_HEAD(dev_priv) == dev_priv->ring.tail) {
GET_RING_HEAD     429 drivers/gpu/drm/r128/r128_drv.h 	ring->space = (GET_RING_HEAD(dev_priv) - ring->tail) * sizeof(u32);