Constant RENDER_ALLOW

pub const RENDER_ALLOW: u32 = bindings::drm_ioctl_flags_DRM_RENDER_ALLOW; // 32u32

This is used for all ioctl needed for rendering only, for drivers which support render nodes. This should be all new render drivers, and hence it should be always set for any ioctl with AUTH set. Note though that read-only query ioctl might have this set, but have not set DRM_AUTH because they do not require authentication.