Hi Kai, kernel test robot noticed the following build warnings: [auto build test WARNING on jejb-scsi/for-next] [also build test WARNING on mkp-scsi/for-next linus/master v6.14-rc2 next-20250210] [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/Kai-M-kisara/scsi-scsi_debug-First-fixes-for-tapes/20250211-031623 base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next patch link: https://lore.kernel.org/r/20250210191232.185207-4-Kai.Makisara%40kolumbus.fi patch subject: [PATCH v1 3/7] scsi: scsi_debug: Add write support with block lengths and 4 bytes of data config: x86_64-kexec (https://download.01.org/0day-ci/archive/20250211/202502112016.6zs2FpD6-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/20250211/202502112016.6zs2FpD6-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/202502112016.6zs2FpD6-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/scsi/scsi_debug.c:31: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:2224: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 504 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 505 | item]; | ~~~~ include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 511 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 512 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 525 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/scsi_debug.c:2985:3: warning: variable 'len' is uninitialized when used here [-Wuninitialized] 2985 | len += resp_partition_m_pg(ap, pcontrol, target); | ^~~ drivers/scsi/scsi_debug.c:2850:28: note: initialize the variable 'len' to silence this warning 2850 | u32 alloc_len, offset, len; | ^ | = 0 >> drivers/scsi/scsi_debug.c:3378:10: warning: variable 'i' is uninitialized when used here [-Wuninitialized] 3378 | for ( ; i < TAPE_MAX_PARTITIONS; i++) | ^ drivers/scsi/scsi_debug.c:3367:7: note: initialize the variable 'i' to silence this warning 3367 | int i; | ^ | = 0 5 warnings generated. vim +/i +3378 drivers/scsi/scsi_debug.c 3363 3364 static int partition_tape(struct sdebug_dev_info *devip, int nbr_partitions, 3365 int part_0_size, int part_1_size) 3366 { 3367 int i; 3368 3369 if (part_0_size + part_1_size > TAPE_UNITS) 3370 return -1; 3371 devip->tape_eop[0] = part_0_size; 3372 devip->tape_blocks[0]->fl_size = TAPE_BLOCK_EOD_FLAG; 3373 devip->tape_eop[1] = part_1_size; 3374 devip->tape_blocks[1] = devip->tape_blocks[0] + 3375 devip->tape_eop[0]; 3376 devip->tape_blocks[1]->fl_size = TAPE_BLOCK_EOD_FLAG; 3377 > 3378 for ( ; i < TAPE_MAX_PARTITIONS; i++) 3379 devip->tape_location[i] = 0; 3380 3381 devip->tape_nbr_partitions = nbr_partitions; 3382 devip->tape_partition = 0; 3383 3384 partition_pg[3] = nbr_partitions - 1; 3385 put_unaligned_be16(devip->tape_eop[0], partition_pg + 8); 3386 put_unaligned_be16(devip->tape_eop[1], partition_pg + 10); 3387 3388 return nbr_partitions; 3389 } 3390 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
