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    SubjectRe: [PATCH 3/4] dm verity: add support for forward error correction
    Hi Sami,

    [auto build test WARNING on: dm/for-next]
    [also build test WARNING on: v4.3 next-20151105]

    url: https://github.com/0day-ci/linux/commits/Sami-Tolvanen/dm-verity-clean-up-duplicate-hashing-code/20151105-124458
    base: https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
    config: s390-allyesconfig (attached as .config)
    reproduce:
    wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
    chmod +x ~/bin/make.cross
    # save the attached .config to linux build tree
    make.cross ARCH=s390

    All warnings (new ones prefixed by >>):

    drivers/md/dm-verity.c: In function 'verity_fec_decode_rsb':
    >> drivers/md/dm-verity.c:812:1: warning: 'verity_fec_decode_rsb' uses dynamic stack allocation
    }
    ^

    vim +/verity_fec_decode_rsb +812 drivers/md/dm-verity.c

    796 if (r < 0)
    797 return r;
    798
    799 r = verity_hash(v, io_hash_desc(v, io), io->fec_buf,
    800 1 << v->data_dev_block_bits, io_real_digest(v, io));
    801 if (unlikely(r < 0))
    802 return r;
    803
    804 if (memcmp(io_real_digest(v, io), io_want_digest(v, io),
    805 v->digest_size)) {
    806 DMERR_LIMIT("%s: FEC %llu: failed to correct (%d erasures)",
    807 v->data_dev->name, (unsigned long long)rsb, neras);
    808 return -1;
    809 }
    810
    811 return 0;
    > 812 }
    813
    814 static int verity_fec_bv_copy(struct dm_verity *v, struct dm_verity_io *io,
    815 u8 *data, size_t len)
    816 {
    817 BUG_ON(io->fec_pos + len > 1 << v->data_dev_block_bits);
    818 memcpy(data, &io->fec_buf[io->fec_pos], len);
    819 io->fec_pos += len;
    820 return 0;

    ---
    0-DAY kernel test infrastructure Open Source Technology Center
    https://lists.01.org/pipermail/kbuild-all Intel Corporation
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