On alpha:

WARNING: "dma_free_coherent" [drivers/char/drm/drm.ko] undefined!
WARNING: "dma_alloc_coherent" [drivers/char/drm/drm.ko] undefined!
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NDave Airlie <airlied@linux.ie>