Hi Andrey,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.13-rc2 next-20170728]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

url:    
https://github.com/0day-ci/linux/commits/Andrey-Smirnov/ZII-RAVE-platform-driver/20170729-210238
config: blackfin-allyesconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
        wget 
https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=blackfin 

All errors (new ones prefixed by >>):

   drivers/platform/rave/rave-sp.c: In function 'csum_ccitt':
   drivers/platform/rave/rave-sp.c:458:25: error: implicit declaration of 
function 'crc_ccitt_false' [-Werror=implicit-function-declaration]
     const u16 calculated = crc_ccitt_false(0xffff, buf, size);
                            ^~~~~~~~~~~~~~~
   drivers/platform/rave/rave-sp.c: In function 'rave_sp_write':
>> drivers/platform/rave/rave-sp.c:495:11: error: 'ENOME' undeclared (first use 
>> in this function)
      return -ENOME;
              ^~~~~
   drivers/platform/rave/rave-sp.c:495:11: note: each undeclared identifier is 
reported only once for each function it appears in
   cc1: some warnings being treated as errors

vim +/ENOME +495 drivers/platform/rave/rave-sp.c

   455  
   456  static void csum_ccitt(const u8 *buf, size_t size, u8 *crc)
   457  {
 > 458          const u16 calculated = crc_ccitt_false(0xffff, buf, size);
   459  
   460          /*
   461           * While the rest of the wire protocol is little-endian,
   462           * CCITT-16 CRC in RDU2 device is sent out in big-endian order.
   463           */
   464          put_unaligned_be16(calculated, crc);
   465  }
   466  
   467  static void *stuff(unsigned char *dest, const unsigned char *src, 
size_t n)
   468  {
   469          while (n--) {
   470                  const unsigned char byte = *src++;
   471  
   472                  switch (byte) {
   473                  case RAVE_SP_STX:
   474                  case RAVE_SP_ETX:
   475                  case RAVE_SP_DLE:
   476                          *dest++ = RAVE_SP_DLE;
   477                          /* FALLTHROUGH */
   478                  default:
   479                          *dest++ = byte;
   480                  }
   481          }
   482  
   483          return dest;
   484  }
   485  
   486  static int rave_sp_write(struct rave_sp *sp, const u8 *data, u8 
data_size)
   487  {
   488          const size_t checksum_length = sp->variant->checksum->length;
   489          unsigned char frame[RAVE_SP_TX_BUFFER_SIZE];
   490          unsigned char crc[RAVE_SP_CHECKSUM_SIZE];
   491          unsigned char *dest = frame;
   492          size_t length;
   493  
   494          if (WARN_ON(checksum_length > sizeof(crc)))
 > 495                  return -ENOME;
   496  
   497          if (WARN_ON(data_size > sizeof(frame)))
   498                  return -ENOMEM;
   499  
   500          sp->variant->checksum->subroutine(data, data_size, crc);
   501  
   502          *dest++ = RAVE_SP_STX;
   503          dest = stuff(dest, data, data_size);
   504          dest = stuff(dest, crc, checksum_length);
   505          *dest++ = RAVE_SP_ETX;
   506  
   507          length = dest - frame;
   508  
   509          print_hex_dump(KERN_DEBUG, "rave-sp tx: ", DUMP_PREFIX_NONE,
   510                         16, 1, frame, length, false);
   511  
   512          return serdev_device_write(sp->serdev, frame, length, HZ);
   513  }
   514  

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

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