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bitspace
2018 Nov 02
0
[PATCH 2/5] drm/virtio: add uapi for in and out explicit fences
...t; + if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
> >> + return -EINVAL;
> >> +
> > I assume this did this trigger when using old userspace?
>
> No, not as far as I'm aware. This check is there to prevent userspace from
> polluting the bitspace of flag, so that all free bits can be used for new flags.
>
> As far as I understand this is pointed out by a drm driver development document
> written by danvet, which I unfortunately can't seem to find the link for at the
> moment.
>
Yes that is correct. What I was asking is:...