Re: [PATCH net-next 2/2] tun: AF_XDP Rx zero-copy support

[kernel test robot]

Hi Yunjian,

kernel test robot noticed the following build warnings:

[auto build test WARNING 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/20240124-174011
base:   net-next/main
patch link:    https://lore.kernel.org/r/1706089075-16084-1-git-send-email-wangyunjian%40huawei.com
patch subject: [PATCH net-next 2/2] tun: AF_XDP Rx zero-copy support
config: i386-randconfig-062-20240127 (https://download.01.org/0day-ci/archive/20240128/202401281735.bX1dign9-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240128/202401281735.bX1dign9-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401281735.bX1dign9-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/net/tun.c:1298:5: sparse: sparse: symbol 'tun_xsk_pool_setup' was not declared. Should it be static?
   drivers/net/tun.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/umh.h, include/linux/kmod.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false

vim +/tun_xsk_pool_setup +1298 drivers/net/tun.c

  1297	
> 1298	int tun_xsk_pool_setup(struct net_device *dev, struct xsk_buff_pool *pool,
  1299			       u16 qid)
  1300	{
  1301		return pool ? tun_xsk_pool_enable(dev, pool, qid) :
  1302			tun_xsk_pool_disable(dev, qid);
  1303	}
  1304	

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