intel_ring_update_space
if (intel_ring_update_space(ring) >= PAGE_SIZE)
intel_ring_update_space(&frame->ring);
intel_ring_update_space(ring);
intel_ring_update_space(ring);
intel_ring_update_space(ring);
if (intel_ring_update_space(ring) >= bytes)
intel_ring_update_space(ring);
intel_ring_update_space(ring);
unsigned int intel_ring_update_space(struct intel_ring *ring);
intel_ring_update_space(ring);
intel_ring_update_space(ring);
intel_ring_update_space(ring);