Hi Yunhui, kernel test robot noticed the following build warnings: [auto build test WARNING on shuah-kselftest/next] [also build test WARNING on shuah-kselftest/fixes linus/master v6.13 next-20250121] [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/Yunhui-Cui/RISC-V-Enable-cbo-clean-flush-in-usermode/20250115-104456 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next patch link: https://lore.kernel.org/r/20250115024024.84365-3-cuiyunhui%40bytedance.com patch subject: [PATCH v5 2/3] RISC-V: hwprobe: Expose Zicbom extension and its block size config: riscv-randconfig-r133-20250121 (https://download.01.org/0day-ci/archive/20250121/202501212220.5GHTtuF7-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project c23f2417dc5f6dc371afb07af5627ec2a9d373a0) reproduce: (https://download.01.org/0day-ci/archive/20250121/202501212220.5GHTtuF7-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/202501212220.5GHTtuF7-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> arch/riscv/kernel/sys_hwprobe.c:284:30: warning: implicit conversion from 'unsigned long long' to 'unsigned long' changes value from 1125899906842624 to 0 [-Wconstant-conversion] 284 | if (hwprobe_ext0_has(cpus, RISCV_HWPROBE_EXT_ZICBOM)) | ~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/include/uapi/asm/hwprobe.h:76:41: note: expanded from macro 'RISCV_HWPROBE_EXT_ZICBOM' 76 | #define RISCV_HWPROBE_EXT_ZICBOM (1ULL << 50) | ~~~~~^~~~~ 1 warning generated. vim +284 arch/riscv/kernel/sys_hwprobe.c 244 245 static void hwprobe_one_pair(struct riscv_hwprobe *pair, 246 const struct cpumask *cpus) 247 { 248 switch (pair->key) { 249 case RISCV_HWPROBE_KEY_MVENDORID: 250 case RISCV_HWPROBE_KEY_MARCHID: 251 case RISCV_HWPROBE_KEY_MIMPID: 252 hwprobe_arch_id(pair, cpus); 253 break; 254 /* 255 * The kernel already assumes that the base single-letter ISA 256 * extensions are supported on all harts, and only supports the 257 * IMA base, so just cheat a bit here and tell that to 258 * userspace. 259 */ 260 case RISCV_HWPROBE_KEY_BASE_BEHAVIOR: 261 pair->value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA; 262 break; 263 264 case RISCV_HWPROBE_KEY_IMA_EXT_0: 265 hwprobe_isa_ext0(pair, cpus); 266 break; 267 268 case RISCV_HWPROBE_KEY_CPUPERF_0: 269 case RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF: 270 pair->value = hwprobe_misaligned(cpus); 271 break; 272 273 case RISCV_HWPROBE_KEY_MISALIGNED_VECTOR_PERF: 274 pair->value = hwprobe_vec_misaligned(cpus); 275 break; 276 277 case RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE: 278 pair->value = 0; 279 if (hwprobe_ext0_has(cpus, RISCV_HWPROBE_EXT_ZICBOZ)) 280 pair->value = riscv_cboz_block_size; 281 break; 282 case RISCV_HWPROBE_KEY_ZICBOM_BLOCK_SIZE: 283 pair->value = 0; > 284 if (hwprobe_ext0_has(cpus, RISCV_HWPROBE_EXT_ZICBOM)) 285 pair->value = riscv_cbom_block_size; 286 break; 287 case RISCV_HWPROBE_KEY_HIGHEST_VIRT_ADDRESS: 288 pair->value = user_max_virt_addr(); 289 break; 290 291 case RISCV_HWPROBE_KEY_TIME_CSR_FREQ: 292 pair->value = riscv_timebase; 293 break; 294 295 /* 296 * For forward compatibility, unknown keys don't fail the whole 297 * call, but get their element key set to -1 and value set to 0 298 * indicating they're unrecognized. 299 */ 300 default: 301 pair->key = -1; 302 pair->value = 0; 303 break; 304 } 305 } 306 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
