_DRM_VBLANK_RELATIVE
return _DRM_VBLANK_RELATIVE ==
case _DRM_VBLANK_RELATIVE:
vblwait->request.type &= ~_DRM_VBLANK_RELATIVE;
#define _DRM_VBLANK_TYPES_MASK (_DRM_VBLANK_ABSOLUTE | _DRM_VBLANK_RELATIVE)
#define _DRM_VBLANK_TYPES_MASK (_DRM_VBLANK_ABSOLUTE | _DRM_VBLANK_RELATIVE)