On Sun, Oct 01, 2017 at 06:20:49AM +0300, Michael S. Tsirkin wrote:
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.
Good tip, thank you! However since we're testing old kernels, too,
we'll need to keep it for probably 1-3 more years.
Thanks,
Fengguang
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
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