Hi Nick,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kdave/for-next]
[also build test ERROR on f2fs/dev-test linus/master v5.9-rc6 next-20200923]
[cannot apply to cryptodev/master crypto/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Nick-Terrell/Update-to-zstd-1-4-6/20200924-064102
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
config: h8300-randconfig-p002-20200923 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross 
ARCH=h8300 

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

All errors (new ones prefixed by >>):

   h8300-linux-ld: lib/zstd/common/entropy_common.o: in function `MEM_swap32':
>> lib/zstd/common/mem.h:179: undefined reference to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/common/mem.h:179: undefined reference to 
>> `__bswapsi2'
>> h8300-linux-ld: lib/zstd/common/mem.h:179: undefined reference to 
>> `__bswapsi2'
>> h8300-linux-ld: lib/zstd/common/mem.h:179: undefined reference to 
>> `__bswapsi2'
   h8300-linux-ld: lib/zstd/common/fse_decompress.o: in function `MEM_swap32':
>> lib/zstd/common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/common/fse_decompress.o:lib/zstd/common/mem.h:179: 
more undefined references to `__bswapsi2' follow
   h8300-linux-ld: lib/zstd/compress/zstd_compress.o: in function `MEM_swap64':
>> lib/zstd/compress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/compress/zstd_compress.o: in function `MEM_swap32':
>> lib/zstd/compress/../common/mem.h:179: undefined reference to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:179: undefined reference 
>> to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:179: undefined reference 
>> to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:179: undefined reference 
>> to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:179: undefined reference 
>> to `__bswapsi2'
   h8300-linux-ld: 
lib/zstd/compress/zstd_compress.o:lib/zstd/compress/../common/mem.h:179: more 
undefined references to `__bswapsi2' follow
   h8300-linux-ld: lib/zstd/compress/zstd_double_fast.o: in function 
`MEM_swap64':
>> lib/zstd/compress/../common/mem.h:192: undefined reference to `__bswapdi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
>> to `__bswapdi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
>> to `__bswapdi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
>> to `__bswapdi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
>> to `__bswapdi2'
   h8300-linux-ld: 
lib/zstd/compress/zstd_double_fast.o:lib/zstd/compress/../common/mem.h:192: 
more undefined references to `__bswapdi2' follow
   h8300-linux-ld: lib/zstd/compress/zstd_opt.o: in function `MEM_swap32':
>> lib/zstd/compress/../common/mem.h:179: undefined reference to `__bswapsi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:179: undefined reference 
>> to `__bswapsi2'
   h8300-linux-ld: lib/zstd/compress/zstd_opt.o: in function `MEM_swap64':
>> lib/zstd/compress/../common/mem.h:192: undefined reference to `__bswapdi2'
>> h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
>> to `__bswapdi2'
   h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
to `__bswapdi2'
   h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
to `__bswapdi2'
   h8300-linux-ld: lib/zstd/compress/../common/mem.h:192: undefined reference 
to `__bswapdi2'
   h8300-linux-ld: 
lib/zstd/compress/zstd_opt.o:lib/zstd/compress/../common/mem.h:192: more 
undefined references to `__bswapdi2' follow
   h8300-linux-ld: lib/zstd/decompress/huf_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: 
lib/zstd/decompress/huf_decompress.o:lib/zstd/decompress/../common/mem.h:179: 
more undefined references to `__bswapsi2' follow
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: 
lib/zstd/decompress/zstd_decompress.o:lib/zstd/decompress/../common/mem.h:179: 
more undefined references to `__bswapsi2' follow
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: 
lib/zstd/decompress/zstd_decompress.o:lib/zstd/decompress/../common/mem.h:179: 
more undefined references to `__bswapsi2' follow
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap64':
   lib/zstd/decompress/../common/mem.h:192: undefined reference to `__bswapdi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/zstd_decompress_block.o: in function 
`MEM_swap32':
   lib/zstd/decompress/../common/mem.h:179: undefined reference to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: lib/zstd/decompress/../common/mem.h:179: undefined reference 
to `__bswapsi2'
   h8300-linux-ld: 
lib/zstd/decompress/zstd_decompress_block.o:lib/zstd/decompress/../common/mem.h:179:
 more undefined references to `__bswapsi2' follow

cppcheck warnings: (new ones prefixed by >>)

>> lib/zstd/decompress/zstd_ddict.c:147:32: warning: Boolean result is used in 
>> bitwise operation. Clarify expression with parentheses. [clarifyCondition]
       if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
                                  ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^
>> lib/zstd/compress/zstd_ldm.c:571:0: warning: Array 'rep[3]' accessed at 
>> index 3, which is out of bounds. [arrayIndexOutOfBounds]
       ZSTD_blockCompressor const blockCompressor =
   ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^
>> lib/zstd/decompress/zstd_decompress.c:133:32: warning: Boolean result is 
>> used in bitwise operation. Clarify expression with parentheses. 
>> [clarifyCondition]
       if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
                                  ^
>> lib/zstd/decompress/zstd_decompress.c:1751:28: warning: Variable 
>> 'zds->inPos' is reassigned a value before the old one has been used. 
>> [redundantAssignment]
                   zds->inPos = 0;   /* input is consumed */
                              ^
   lib/zstd/decompress/zstd_decompress.c:1747:28: note: Variable 'zds->inPos' 
is reassigned a value before the old one has been used.
                   zds->inPos += loadedSize;
                              ^
   lib/zstd/decompress/zstd_decompress.c:1751:28: note: Variable 'zds->inPos' 
is reassigned a value before the old one has been used.
                   zds->inPos = 0;   /* input is consumed */
                              ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^
>> lib/zstd/compress/zstd_compress.c:84:32: warning: Boolean result is used in 
>> bitwise operation. Clarify expression with parentheses. [clarifyCondition]
       if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
                                  ^
   lib/zstd/compress/zstd_compress.c:200:32: warning: Boolean result is used in 
bitwise operation. Clarify expression with parentheses. [clarifyCondition]
       if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
                                  ^
   lib/zstd/compress/zstd_compress.c:3345:32: warning: Boolean result is used 
in bitwise operation. Clarify expression with parentheses. [clarifyCondition]
       if (!customMem.customAlloc ^ !customMem.customFree) return NULL;
                                  ^
>> lib/zstd/common/zstd_internal.h:401:27: warning: Array 'DeBruijnClz[32]' 
>> accessed at index 509099, which is out of bounds. [arrayIndexOutOfBounds]
           return DeBruijnClz[(v * 0x07C4ACDDU) >> 27];
                             ^
   lib/zstd/compress/zstd_compress.c:3494:40: note: Assignment 
'limitedSrcSize=(uint32_t)(pledgedSrcSize<524288U?pledgedSrcSize:524288U)', 
assigned value is 524288
               U32 const limitedSrcSize = (U32)MIN(pledgedSrcSize, 1U << 19);
                                          ^
   lib/zstd/compress/zstd_compress.c:3495:90: note: Calling function 
'ZSTD_highbit32', 1st argument 'limitedSrcSize-1' value is 524287
               U32 const limitedSrcLog = limitedSrcSize > 1 ? 
ZSTD_highbit32(limitedSrcSize - 1) + 1 : 1;
                                                                                
            ^
   lib/zstd/common/zstd_internal.h:395:17: note: Assignment 'v=val', assigned 
value is 524287
           U32 v = val;
                   ^
   lib/zstd/common/zstd_internal.h:396:0: note: Assignment 'v=v|(v>>1)', 
assigned value is 524287
           v |= v >> 1;
   ^
   lib/zstd/common/zstd_internal.h:397:0: note: Assignment 'v=v|(v>>2)', 
assigned value is 524287
           v |= v >> 2;
   ^
   lib/zstd/common/zstd_internal.h:398:0: note: Assignment 'v=v|(v>>4)', 
assigned value is 524287
           v |= v >> 4;
   ^
   lib/zstd/common/zstd_internal.h:399:0: note: Assignment 'v=v|(v>>8)', 
assigned value is 524287
           v |= v >> 8;
   ^
   lib/zstd/common/zstd_internal.h:400:0: note: Assignment 'v=v|(v>>16)', 
assigned value is 524287
           v |= v >> 16;
   ^
   lib/zstd/common/zstd_internal.h:401:27: note: Array index out of bounds
           return DeBruijnClz[(v * 0x07C4ACDDU) >> 27];
                             ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^
>> lib/zstd/compress/zstd_lazy.c:663:74: warning: Overflow in pointer 
>> arithmetic, NULL pointer is subtracted. [nullPointerArithmetic]
       const U32 dictAndPrefixLength = (U32)((ip - prefixLowest) + (dictEnd - 
dictLowest));
                                                                            ^
   lib/zstd/compress/zstd_lazy.c:658:70: note: Assignment 
'dictEnd=dictMode==ZSTD_dictMatchState?dms->window.nextSrc:NULL', assigned 
value is 0
       const BYTE* const dictEnd      = dictMode == ZSTD_dictMatchState ?
                                                                        ^
   lib/zstd/compress/zstd_lazy.c:663:74: note: Null pointer subtraction
       const U32 dictAndPrefixLength = (U32)((ip - prefixLowest) + (dictEnd - 
dictLowest));
                                                                            ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^
>> lib/zstd/compress/zstd_double_fast.c:97:75: warning: Overflow in pointer 
>> arithmetic, NULL pointer is subtracted. [nullPointerArithmetic]
       const U32 dictAndPrefixLength  = (U32)((ip - prefixLowest) + (dictEnd - 
dictStart));
                                                                             ^
   lib/zstd/compress/zstd_double_fast.c:88:70: note: Assignment 
'dictEnd=dictMode==ZSTD_dictMatchState?dms->window.nextSrc:NULL', assigned 
value is 0
       const BYTE* const dictEnd      = dictMode == ZSTD_dictMatchState ?
                                                                        ^
   lib/zstd/compress/zstd_double_fast.c:97:75: note: Null pointer subtraction
       const U32 dictAndPrefixLength  = (U32)((ip - prefixLowest) + (dictEnd - 
dictStart));
                                                                             ^
>> lib/zstd/common/zstd_deps.h:131:0: warning: syntax error [syntaxError]
   
   ^

# 
https://github.com/0day-ci/linux/commit/400786d3b08436113bcb3c9c16a97eefc31317c1
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review 
Nick-Terrell/Update-to-zstd-1-4-6/20200924-064102
git checkout 400786d3b08436113bcb3c9c16a97eefc31317c1
vim +179 lib/zstd/common/mem.h

   173  
   174  
   175  MEM_STATIC U32 MEM_swap32(U32 in)
   176  {
   177  #if (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \
   178    || (defined(__clang__) && __has_builtin(__builtin_bswap32))
 > 179      return __builtin_bswap32(in);
   180  #else
   181      return  ((in << 24) & 0xff000000 ) |
   182              ((in <<  8) & 0x00ff0000 ) |
   183              ((in >>  8) & 0x0000ff00 ) |
   184              ((in >> 24) & 0x000000ff );
   185  #endif
   186  }
   187  

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

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