Hi Xuan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Xuan-Zhuo/virtio-net-support-xdp... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git c7654495916e109f76a67fd3ae68f8fa70ab4faa config: parisc-randconfig-r023-20210617 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/6155fdb771fa9f6c96472440c6b846dbf... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xuan-Zhuo/virtio-net-support-xdp-socket-zero-copy/20210617-033438 git checkout 6155fdb771fa9f6c96472440c6b846dbfc4aebde # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/virtio/virtio_ring.c:1898: warning: expecting prototype for virtqueue_get_buf(). Prototype was for virtqueue_get_buf_ctx() instead drivers/virtio/virtio_ring.c:2024: warning: Function parameter or member 'ctx' not described in 'virtqueue_detach_unused_buf_ctx' vim +2024 drivers/virtio/virtio_ring.c e6f633e5beab65 Tiwei Bie 2018-11-21 2014 138fd25148638a Tiwei Bie 2018-11-21 2015 /** 138fd25148638a Tiwei Bie 2018-11-21 2016 * virtqueue_detach_unused_buf - detach first unused buffer a5581206c565a7 Jiang Biao 2019-04-23 2017 * @_vq: the struct virtqueue we're talking about. 138fd25148638a Tiwei Bie 2018-11-21 2018 * 138fd25148638a Tiwei Bie 2018-11-21 2019 * Returns NULL or the "data" token handed to virtqueue_add_*(). 138fd25148638a Tiwei Bie 2018-11-21 2020 * This is not valid on an active queue; it is useful only for device 138fd25148638a Tiwei Bie 2018-11-21 2021 * shutdown. 138fd25148638a Tiwei Bie 2018-11-21 2022 */ 6155fdb771fa9f Xuan Zhuo 2021-06-10 2023 void *virtqueue_detach_unused_buf_ctx(struct virtqueue *_vq, void **ctx) 138fd25148638a Tiwei Bie 2018-11-21 @2024 { 1ce9e6055fa0a9 Tiwei Bie 2018-11-21 2025 struct vring_virtqueue *vq = to_vvq(_vq); 1ce9e6055fa0a9 Tiwei Bie 2018-11-21 2026 6155fdb771fa9f Xuan Zhuo 2021-06-10 2027 return vq->packed_ring ? 6155fdb771fa9f Xuan Zhuo 2021-06-10 2028 virtqueue_detach_unused_buf_ctx_packed(_vq, ctx) : 6155fdb771fa9f Xuan Zhuo 2021-06-10 2029 virtqueue_detach_unused_buf_ctx_split(_vq, ctx); 6155fdb771fa9f Xuan Zhuo 2021-06-10 2030 } 6155fdb771fa9f Xuan Zhuo 2021-06-10 2031 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org