Hi Xuan, kernel test robot noticed the following build warnings: [auto build test WARNING on mst-vhost/linux-next] [cannot apply to net-next/main linus/master horms-ipvs/master v6.7-rc7 next-20231222] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Xuan-Zhuo/virtio_net-rename-free_old_xmit_skbs-to-free_old_xmit/20231229-155253 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next patch link: https://lore.kernel.org/r/20231229073108.57778-24-xuanzhuo%40linux.alibaba.com patch subject: [PATCH net-next v3 23/27] virtio_net: xsk: rx: support recv merge mode config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231230/202312300404.1R72Ssbh-lkp@xxxxxxxxx/config) compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231230/202312300404.1R72Ssbh-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/202312300404.1R72Ssbh-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/net/virtio/xsk.c:216:17: warning: variable 'xdp' is uninitialized when used here [-Wuninitialized] 216 | xsk_buff_free(xdp); | ^~~ drivers/net/virtio/xsk.c:210:22: note: initialize the variable 'xdp' to silence this warning 210 | struct xdp_buff *xdp; | ^ | = NULL 1 warning generated. vim +/xdp +216 drivers/net/virtio/xsk.c 202 203 struct sk_buff *virtnet_receive_xsk_buf(struct virtnet_info *vi, struct virtnet_rq *rq, 204 void *buf, u32 len, 205 unsigned int *xdp_xmit, 206 struct virtnet_rq_stats *stats) 207 { 208 struct net_device *dev = vi->dev; 209 struct sk_buff *skb = NULL; 210 struct xdp_buff *xdp; 211 212 if (unlikely(len < vi->hdr_len + ETH_HLEN)) { 213 pr_debug("%s: short packet %i\n", dev->name, len); 214 DEV_STATS_INC(dev, rx_length_errors); 215 > 216 xsk_buff_free(xdp); 217 return NULL; 218 } 219 220 len -= vi->hdr_len; 221 222 u64_stats_add(&stats->bytes, len); 223 224 xdp = buf_to_xdp(vi, rq, buf, len); 225 if (!xdp) 226 return NULL; 227 228 if (vi->mergeable_rx_bufs) 229 skb = virtnet_receive_xsk_merge(dev, vi, rq, xdp, xdp_xmit, stats); 230 231 return skb; 232 } 233 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
