Re: [PATCH net-next v2 3/3] tun: AF_XDP Tx zero-copy support

[kernel test robot <lkp@intel.com>]

Hi Yunjian,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Yunjian-Wang/xsk-Remove-non-zero-dma_page-check-in-xp_assign_dev/20240228-190840
base:   net-next/main
patch link:    https://lore.kernel.org/r/1709118356-133960-1-git-send-email-wangyunjian%40huawei.com
patch subject: [PATCH net-next v2 3/3] tun: AF_XDP Tx zero-copy support
config: i386-randconfig-012-20240229 (https://download.01.org/0day-ci/archive/20240229/202402291828.G9c5tW50-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240229/202402291828.G9c5tW50-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402291828.G9c5tW50-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/vhost/net.c: In function 'vhost_net_buf_peek_len':
>> drivers/vhost/net.c:206:27: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
      struct xdp_desc *desc = tun_ptr_to_xdp_desc(ptr);
                              ^~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +206 drivers/vhost/net.c

   198	
   199	static int vhost_net_buf_peek_len(void *ptr)
   200	{
   201		if (tun_is_xdp_frame(ptr)) {
   202			struct xdp_frame *xdpf = tun_ptr_to_xdp(ptr);
   203	
   204			return xdpf->len;
   205		} else if (tun_is_xdp_desc_frame(ptr)) {
 > 206			struct xdp_desc *desc = tun_ptr_to_xdp_desc(ptr);
   207	
   208			return desc->len;
   209		}
   210	
   211		return __skb_array_len_with_tag(ptr);
   212	}
   213	

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