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SubjectRe: [PATCH 2/5] drm/virtio: add uapi for in and out explicit fences
  Hi,

> The execbuffer IOCTL is now read-write to allow the userspace to read the
> out-fence.

> #define DRM_IOCTL_VIRTGPU_EXECBUFFER \
> - DRM_IOW(DRM_COMMAND_BASE + DRM_VIRTGPU_EXECBUFFER,\
> + DRM_IOWR(DRM_COMMAND_BASE + DRM_VIRTGPU_EXECBUFFER,\
> struct drm_virtgpu_execbuffer)

That changes the ioctl number and breaks the userspace api.

cheers,
Gerd

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