On Thu, Jan 14, 2016 at 11:47:17AM +0000, John Harrison wrote: > On 13/01/2016 18:43, Chris Wilson wrote: > >Use the upper s32 for the output, so again you are not overwriting user > >state without good reason. > > > Makes sense. Will do.
It would also be useful (for nefarious reasons) to only copy back the rsvd2 field, i.e. keep it as DRM_IOW(EXECBUFFER2) and do the small fixed-sized copy_to_user of rsvd2 as required. That means we can avoid the copy mostly, and treat args as a private copy of the user parameters, i.e. space we can scribble over with impunity. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
