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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