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: arm64-defconfig (https://download.01.org/0day-ci/archive/20231230/202312300808.efv5HGcd-lkp@xxxxxxxxx/config) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231230/202312300808.efv5HGcd-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/202312300808.efv5HGcd-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/net/virtio/main.c: In function 'virtnet_receive': >> drivers/net/virtio/main.c:1895:27: warning: variable 'pctx' set but not used [-Wunused-but-set-variable] 1895 | void *buf, *ctx, *pctx = NULL; | ^~~~ vim +/pctx +1895 drivers/net/virtio/main.c 1889 1890 static int virtnet_receive(struct virtnet_rq *rq, int budget, 1891 unsigned int *xdp_xmit) 1892 { 1893 struct virtnet_info *vi = rq->vq->vdev->priv; 1894 struct virtnet_rq_stats stats = {}; > 1895 void *buf, *ctx, *pctx = NULL; 1896 unsigned int len; 1897 int packets = 0; 1898 int i; 1899 1900 if (rq->xsk.pool) { 1901 struct sk_buff *skb; 1902 1903 while (packets < budget) { 1904 buf = virtqueue_get_buf(rq->vq, &len); 1905 if (!buf) 1906 break; 1907 1908 skb = virtnet_receive_xsk_buf(vi, rq, buf, len, xdp_xmit, &stats); 1909 if (skb) 1910 virtnet_receive_done(vi, rq, skb); 1911 1912 packets++; 1913 } 1914 } else { 1915 if (!vi->big_packets || vi->mergeable_rx_bufs) 1916 pctx = &ctx; 1917 else 1918 ctx = NULL; 1919 1920 while (packets < budget) { 1921 buf = virtnet_rq_get_buf(rq, &len, &ctx); 1922 if (!buf) 1923 break; 1924 1925 receive_buf(vi, rq, buf, len, ctx, xdp_xmit, &stats); 1926 packets++; 1927 } 1928 } 1929 1930 if (rq->vq->num_free > min((unsigned int)budget, virtqueue_get_vring_size(rq->vq)) / 2) { 1931 if (!try_fill_recv(vi, rq, GFP_ATOMIC)) { 1932 spin_lock(&vi->refill_lock); 1933 if (vi->refill_enabled) 1934 schedule_delayed_work(&vi->refill, 0); 1935 spin_unlock(&vi->refill_lock); 1936 } 1937 } 1938 1939 u64_stats_set(&stats.packets, packets); 1940 u64_stats_update_begin(&rq->stats.syncp); 1941 for (i = 0; i < VIRTNET_RQ_STATS_LEN; i++) { 1942 size_t offset = virtnet_rq_stats_desc[i].offset; 1943 u64_stats_t *item, *src; 1944 1945 item = (u64_stats_t *)((u8 *)&rq->stats + offset); 1946 src = (u64_stats_t *)((u8 *)&stats + offset); 1947 u64_stats_add(item, u64_stats_read(src)); 1948 } 1949 u64_stats_update_end(&rq->stats.syncp); 1950 1951 return packets; 1952 } 1953 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
