On Sun, Oct 01, 2017 at 08:09:30AM +0800, kbuild test robot wrote:
> Hi Willem,
>
> [auto build test WARNING on net-next/master]
>
> url:
> https://github.com/0day-ci/linux/commits/Willem-de-Bruijn/vhost_net-do-not-stall-on-zerocopy-depletion/20171001-054709
> reproduce:
> # apt-get install sparse
> make ARCH=x86_64 allmodconfig
> make C=1 CF=-D__CHECK_ENDIAN__
BTW __CHECK_ENDIAN__ is the default now, I think you can drop it from
your scripts.
>
> sparse warnings: (new ones prefixed by >>)
>
>
> vim +440 drivers/vhost/net.c
>
> 433
> 434 static bool vhost_exceeds_maxpend(struct vhost_net *net)
> 435 {
> 436 struct vhost_net_virtqueue *nvq =
> &net->vqs[VHOST_NET_VQ_TX];
> 437 struct vhost_virtqueue *vq = &nvq->vq;
> 438
> 439 return (nvq->upend_idx + UIO_MAXIOV - nvq->done_idx) %
> UIO_MAXIOV >
> > 440 min(VHOST_MAX_PEND, vq->num >> 2);
> 441 }
> 442
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
