[dm-devel] [dm:for-next 7/8] include/uapi/linux/byteorder/little_endian.h:32:42: warning: cast from pointer to integer of different size

kernel test robot lkp at intel.com
Thu May 20 16:14:09 UTC 2021


tree:   https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
head:   68040817337fda98196974401391f2d1b9f87e49
commit: def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36 [7/8] dm space maps: improve performance with inc/dec on ranges of blocks
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/commit/?id=def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36
        git remote add dm https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git
        git fetch --no-tags dm for-next
        git checkout def6a7a9a7f0e7e3886fb77cf45c4a48e7e71c36
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/byteorder/little_endian.h:5,
                    from arch/x86/include/uapi/asm/byteorder.h:5,
                    from include/asm-generic/bitops/le.h:7,
                    from arch/x86/include/asm/bitops.h:395,
                    from include/linux/bitops.h:32,
                    from include/linux/kernel.h:12,
                    from arch/x86/include/asm/percpu.h:27,
                    from arch/x86/include/asm/current.h:6,
                    from include/linux/sched.h:12,
                    from include/linux/blkdev.h:5,
                    from drivers/md/persistent-data/dm-block-manager.h:11,
                    from drivers/md/persistent-data/dm-btree.h:9,
                    from drivers/md/persistent-data/dm-array.h:9,
                    from drivers/md/persistent-data/dm-array.c:7:
   drivers/md/persistent-data/dm-array.c: In function 'block_inc':
>> include/uapi/linux/byteorder/little_endian.h:32:42: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      32 | #define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
         |                                          ^
   include/linux/byteorder/generic.h:87:21: note: in expansion of macro '__le64_to_cpu'
      87 | #define le64_to_cpu __le64_to_cpu
         |                     ^~~~~~~~~~~~~
   drivers/md/persistent-data/dm-array.c:578:34: note: in expansion of macro 'le64_to_cpu'
     578 |   dm_tm_inc(info->btree_info.tm, le64_to_cpu(block_le));
         |                                  ^~~~~~~~~~~


vim +32 include/uapi/linux/byteorder/little_endian.h

5921e6f8809b161 David Howells 2012-10-13  14  
5921e6f8809b161 David Howells 2012-10-13  15  #define __constant_htonl(x) ((__force __be32)___constant_swab32((x)))
5921e6f8809b161 David Howells 2012-10-13  16  #define __constant_ntohl(x) ___constant_swab32((__force __be32)(x))
5921e6f8809b161 David Howells 2012-10-13  17  #define __constant_htons(x) ((__force __be16)___constant_swab16((x)))
5921e6f8809b161 David Howells 2012-10-13  18  #define __constant_ntohs(x) ___constant_swab16((__force __be16)(x))
5921e6f8809b161 David Howells 2012-10-13  19  #define __constant_cpu_to_le64(x) ((__force __le64)(__u64)(x))
5921e6f8809b161 David Howells 2012-10-13  20  #define __constant_le64_to_cpu(x) ((__force __u64)(__le64)(x))
5921e6f8809b161 David Howells 2012-10-13  21  #define __constant_cpu_to_le32(x) ((__force __le32)(__u32)(x))
5921e6f8809b161 David Howells 2012-10-13  22  #define __constant_le32_to_cpu(x) ((__force __u32)(__le32)(x))
5921e6f8809b161 David Howells 2012-10-13  23  #define __constant_cpu_to_le16(x) ((__force __le16)(__u16)(x))
5921e6f8809b161 David Howells 2012-10-13  24  #define __constant_le16_to_cpu(x) ((__force __u16)(__le16)(x))
5921e6f8809b161 David Howells 2012-10-13  25  #define __constant_cpu_to_be64(x) ((__force __be64)___constant_swab64((x)))
5921e6f8809b161 David Howells 2012-10-13  26  #define __constant_be64_to_cpu(x) ___constant_swab64((__force __u64)(__be64)(x))
5921e6f8809b161 David Howells 2012-10-13  27  #define __constant_cpu_to_be32(x) ((__force __be32)___constant_swab32((x)))
5921e6f8809b161 David Howells 2012-10-13  28  #define __constant_be32_to_cpu(x) ___constant_swab32((__force __u32)(__be32)(x))
5921e6f8809b161 David Howells 2012-10-13  29  #define __constant_cpu_to_be16(x) ((__force __be16)___constant_swab16((x)))
5921e6f8809b161 David Howells 2012-10-13  30  #define __constant_be16_to_cpu(x) ___constant_swab16((__force __u16)(__be16)(x))
5921e6f8809b161 David Howells 2012-10-13  31  #define __cpu_to_le64(x) ((__force __le64)(__u64)(x))
5921e6f8809b161 David Howells 2012-10-13 @32  #define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
5921e6f8809b161 David Howells 2012-10-13  33  #define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
5921e6f8809b161 David Howells 2012-10-13  34  #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
5921e6f8809b161 David Howells 2012-10-13  35  #define __cpu_to_le16(x) ((__force __le16)(__u16)(x))
5921e6f8809b161 David Howells 2012-10-13  36  #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
5921e6f8809b161 David Howells 2012-10-13  37  #define __cpu_to_be64(x) ((__force __be64)__swab64((x)))
5921e6f8809b161 David Howells 2012-10-13  38  #define __be64_to_cpu(x) __swab64((__force __u64)(__be64)(x))
5921e6f8809b161 David Howells 2012-10-13  39  #define __cpu_to_be32(x) ((__force __be32)__swab32((x)))
5921e6f8809b161 David Howells 2012-10-13  40  #define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x))
5921e6f8809b161 David Howells 2012-10-13  41  #define __cpu_to_be16(x) ((__force __be16)__swab16((x)))
5921e6f8809b161 David Howells 2012-10-13  42  #define __be16_to_cpu(x) __swab16((__force __u16)(__be16)(x))
5921e6f8809b161 David Howells 2012-10-13  43  

:::::: The code at line 32 was first introduced by commit
:::::: 5921e6f8809b1616932ca4afd40fe449faa8fd88 UAPI: (Scripted) Disintegrate include/linux/byteorder

:::::: TO: David Howells <dhowells at redhat.com>
:::::: CC: David Howells <dhowells at redhat.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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