On Fri, Sep 27, 2024 at 09:39:54AM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/djiang/linux.git
> cxl/fwctl
> head: b4f2900f53c72de8fc639b62e44763c6a9695d3b
> commit: 5a0496c19151d83cd0d926f8a1488eeaab27509b [13/25] cxl: Add Get
> Supported Features command for kernel usage
> config: arm-randconfig-004-20240927
> (https://download.01.org/0day-ci/archive/20240927/202409270908.njpl38kw-...@intel.com/config)
> compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project
> 7773243d9916f98ba0ffce0c3a960e4aa9f03e81)
> reproduce (this is a W=1 build):
> (https://download.01.org/0day-ci/archive/20240927/202409270908.njpl38kw-...@intel.com/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 <l...@intel.com>
> | Closes:
> https://lore.kernel.org/oe-kbuild-all/202409270908.njpl38kw-...@intel.com/
>
> All errors (new ones prefixed by >>):
>
> In file included from drivers/cxl/port.c:7:
> In file included from drivers/cxl/cxlmem.h:6:
> In file included from include/linux/pci.h:1646:
> In file included from include/linux/dmapool.h:14:
> In file included from include/linux/scatterlist.h:8:
> In file included from include/linux/mm.h:2232:
> include/linux/vmstat.h:517:36: warning: arithmetic between different
> enumeration types ('enum node_stat_item' and 'enum lru_list')
> [-Wenum-enum-conversion]
> 517 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
> | ~~~~~~~~~~~ ^ ~~~
> In file included from drivers/cxl/port.c:7:
> >> drivers/cxl/cxlmem.h:798:44: error: 'counted_by' argument must be a simple
> >> declaration reference
> 798 | struct cxl_feat_entry ents[]
> __counted_by(le32_to_cpu(supported_feats));
> |
> ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It seems like this should likely use the __counted_by_le() macro so that
it is only used for tracking on little endian targets?
> include/linux/byteorder/generic.h:89:21: note: expanded from macro
> 'le32_to_cpu'
> 89 | #define le32_to_cpu __le32_to_cpu
> | ^
> include/uapi/linux/byteorder/little_endian.h:35:26: note: expanded from
> macro '__le32_to_cpu'
> 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
> | ^
> include/linux/compiler_attributes.h:105:62: note: expanded from macro
> '__counted_by'
> 105 | # define __counted_by(member)
> __attribute__((__counted_by__(member)))
> |
> ^~~~~~
> 1 warning and 1 error generated.
>
>
> vim +/counted_by +798 drivers/cxl/cxlmem.h
>
> 793
> 794 struct cxl_mbox_get_sup_feats_out {
> 795 __le16 num_entries;
> 796 __le16 supported_feats;
> 797 u8 reserved[4];
> > 798 struct cxl_feat_entry ents[]
> __counted_by(le32_to_cpu(supported_feats));
> 799 } __packed;
> 800
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
