Hi Jonathan, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net/master] [also build test WARNING on linus/master v5.8-rc1 next-20200618] [cannot apply to char-misc/char-misc-testing net-next/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jonathan-Lemon/netgpu-networking... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git ef7232da6bcd4294cbb2d424bc35885721570f01 config: sparc-allyesconfig (attached as .config) compiler: sparc64-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc 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 >>, old ones prefixed by <<): drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_alloc_rq': drivers/net/ethernet/mellanox/mlx5/core/en_main.c:380:6: warning: unused variable 'num_xsk_frames' [-Wunused-variable] 380 | u32 num_xsk_frames = 0; | ^~~~~~~~~~~~~~ In file included from include/linux/kernel.h:13, from include/asm-generic/bug.h:19, from arch/sparc/include/asm/bug.h:25, from include/linux/bug.h:5, from include/linux/refcount.h:96, from include/net/act_api.h:9, from include/net/tc_act/tc_gact.h:5, from drivers/net/ethernet/mellanox/mlx5/core/en_main.c:33: drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_build_rq_frags_info': << from drivers/net/ethernet/mellanox/mlx5/core/en_main.c:42: 2097 | PAGE_SIZE : include/linux/log2.h:176:4: note: in definition of macro 'roundup_pow_of_two' 176 | (n == 1) ? 1 : | ^ vim +2097 drivers/net/ethernet/mellanox/mlx5/core/en_main.c 2060 2061 if (!hd_split && mlx5e_rx_is_linear_skb(params, xsk)) { 2062 int frag_stride; 2063 2064 frag_stride = mlx5e_rx_get_linear_frag_sz(params, xsk); 2065 frag_stride = roundup_pow_of_two(frag_stride); 2066 2067 info->arr[0].frag_size = byte_count; 2068 info->arr[0].frag_stride = frag_stride; 2069 info->num_frags = 1; 2070 info->wqe_bulk = PAGE_SIZE / frag_stride; 2071 goto out; 2072 } 2073 2074 if (byte_count > PAGE_SIZE + 2075 (MLX5E_MAX_RX_FRAGS - 1) * frag_size_max) 2076 frag_size_max = PAGE_SIZE; 2077 2078 i = 0; 2079 2080 if (hd_split) { 2081 // Start with one fragment for all headers (implementing HDS) 2082 info->arr[0].frag_size = TOTAL_HEADERS; 2083 info->arr[0].frag_stride = roundup_pow_of_two(PAGE_SIZE); 2084 buf_size += TOTAL_HEADERS; 2085 // Now, continue with the payload frags. 2086 i = 1; 2087 } 2088 2089 while (buf_size < byte_count) { 2090 int frag_size = byte_count - buf_size; 2091 2092 if (i < MLX5E_MAX_RX_FRAGS - 1) 2093 frag_size = min(frag_size, frag_size_max); 2094 2095 info->arr[i].frag_size = frag_size; 2096 info->arr[i].frag_stride = roundup_pow_of_two(hd_split ? 2098 frag_size); 2099 info->arr[i].frag_source = hd_split; 2100 buf_size += frag_size; 2101 i++; 2102 } 2103 info->num_frags = i; 2104 /* number of different wqes sharing a page */ 2105 info->wqe_bulk = 1 + (info->num_frags % 2); 2106 2107 out: 2108 info->wqe_bulk = max_t(u8, info->wqe_bulk, 8); 2109 info->log_num_frags = order_base_2(info->num_frags); 2110 } 2111 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org