netdev - Re: [PATCH net-next] vhost_net: do not stall on zerocopy depletion

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Message-ID: <201710010643.vBr77xtG%fengguang.wu@intel.com>
Date:   Sun, 1 Oct 2017 06:20:53 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org, davem@...emloft.net,
        mst@...hat.com, jasowang@...hat.com, den@...ipeden.com,
        virtualization@...ts.linux-foundation.org,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH net-next] vhost_net: do not stall on zerocopy depletion

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
config: tile-allyesconfig (attached as .config)
compiler: tilegx-linux-gcc (GCC) 4.6.2
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=tile 

All warnings (new ones prefixed by >>):

   drivers/vhost/net.c: In function 'vhost_exceeds_maxpend':
>> drivers/vhost/net.c:440:9: warning: comparison of distinct pointer types lacks a cast [enabled by default]

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

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