DRM_I915_GEM_GET_APERTURE 336 include/uapi/drm/i915_drm.h #define DRM_I915_GEM_GET_APERTURE 0x23 DRM_I915_GEM_GET_APERTURE 336 tools/include/uapi/drm/i915_drm.h #define DRM_I915_GEM_GET_APERTURE 0x23