Hi Keith, kernel test robot noticed the following build warnings: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on next-20241205] [cannot apply to brauner-vfs/vfs.all hch-configfs/for-next linus/master v6.13-rc1] [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/Keith-Busch/fs-add-a-write-stream-field-to-the-kiocb/20241206-095707 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next patch link: https://lore.kernel.org/r/20241206015308.3342386-10-kbusch%40meta.com patch subject: [PATCHv11 09/10] nvme: register fdp queue limits config: i386-buildonly-randconfig-003 (https://download.01.org/0day-ci/archive/20241206/202412061328.YMG9MZn5-lkp@xxxxxxxxx/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241206/202412061328.YMG9MZn5-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/202412061328.YMG9MZn5-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/nvme/host/core.c:8: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:8: In file included from include/linux/cacheflush.h:5: In file included from arch/x86/include/asm/cacheflush.h:5: In file included from include/linux/mm.h:2223: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> drivers/nvme/host/core.c:2178:18: warning: variable 'h' is uninitialized when used here [-Wuninitialized] 2178 | n = le16_to_cpu(h->numfdpc) + 1; | ^ include/linux/byteorder/generic.h:91:21: note: expanded from macro 'le16_to_cpu' 91 | #define le16_to_cpu __le16_to_cpu | ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ drivers/nvme/host/core.c:2157:36: note: initialize the variable 'h' to silence this warning 2157 | struct nvme_fdp_config_log hdr, *h; | ^ | = NULL 2 warnings generated. vim +/h +2178 drivers/nvme/host/core.c 2153 2154 static int nvme_check_fdp(struct nvme_ns *ns, struct nvme_ns_info *info, 2155 u8 fdp_idx) 2156 { 2157 struct nvme_fdp_config_log hdr, *h; 2158 size_t size = sizeof(hdr); 2159 int i, n, ret; 2160 void *log; 2161 2162 info->runs = 0; 2163 ret = nvme_get_log_lsi(ns->ctrl, 0, NVME_LOG_FDP_CONFIG, 0, NVME_CSI_NVM, 2164 (void *)&hdr, size, 0, info->endgid); 2165 if (ret) 2166 return ret; 2167 2168 size = le32_to_cpu(hdr.sze); 2169 log = kzalloc(size, GFP_KERNEL); 2170 if (!log) 2171 return 0; 2172 2173 ret = nvme_get_log_lsi(ns->ctrl, 0, NVME_LOG_FDP_CONFIG, 0, NVME_CSI_NVM, 2174 log, size, 0, info->endgid); 2175 if (ret) 2176 goto out; 2177 > 2178 n = le16_to_cpu(h->numfdpc) + 1; 2179 if (fdp_idx > n) 2180 goto out; 2181 2182 h = log; 2183 log = h->configs; 2184 for (i = 0; i < n; i++) { 2185 struct nvme_fdp_config_desc *config = log; 2186 2187 if (i == fdp_idx) { 2188 info->runs = le64_to_cpu(config->runs); 2189 break; 2190 } 2191 log += le16_to_cpu(config->size); 2192 } 2193 out: 2194 kfree(h); 2195 return ret; 2196 } 2197 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
