Hi Thorsten, kernel test robot noticed the following build warnings: [auto build test WARNING on kees/for-next/pstore] [also build test WARNING on kees/for-next/kspp linus/master v6.12-rc3 next-20241015] [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/Thorsten-Blum/hv-hyperv-h-Annotate-vmbus_channel_gpadl_header-with-__counted_by/20241015-182055 base: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore patch link: https://lore.kernel.org/r/20241015101829.94876-2-thorsten.blum%40linux.dev patch subject: [PATCH] hv: hyperv.h: Annotate vmbus_channel_gpadl_header with __counted_by() config: arm64-randconfig-001-20241016 (https://download.01.org/0day-ci/archive/20241016/202410161148.ODpoEJF0-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project bfe84f7085d82d06d61c632a7bad1e692fd159e4) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241016/202410161148.ODpoEJF0-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/202410161148.ODpoEJF0-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/arm64/hyperv/hv_core.c:13: In file included from include/linux/mm.h:2228: include/linux/vmstat.h:500:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 500 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 501 | item]; | ~~~~ include/linux/vmstat.h:507:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 507 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 508 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 519 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 520 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 528 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 529 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm64/hyperv/hv_core.c:14: >> include/linux/hyperv.h:646:2: warning: 'counted_by' should not be applied to an array with element of unknown size because 'struct gpa_range' is a struct type with a flexible array member. This will be an error in a future compiler version [-Wbounds-safety-counted-by-elt-type-unknown-size] 646 | struct gpa_range range[] __counted_by(rangecount); | ^~~~~~~~~~~~~~~~~~~~~~~~ 6 warnings generated. vim +646 include/linux/hyperv.h 633 634 /* 635 * The number of PFNs in a GPADL message is defined by the number of 636 * pages that would be spanned by ByteCount and ByteOffset. If the 637 * implied number of PFNs won't fit in this packet, there will be a 638 * follow-up packet that contains more. 639 */ 640 struct vmbus_channel_gpadl_header { 641 struct vmbus_channel_message_header header; 642 u32 child_relid; 643 u32 gpadl; 644 u16 range_buflen; 645 u16 rangecount; > 646 struct gpa_range range[] __counted_by(rangecount); 647 } __packed; 648 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
