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Date:   Sun, 17 Jan 2021 09:26:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nick Terrell <terrelln@...com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>,
        Kees Cook <keescook@...omium.org>
Subject: lib/zstd/compress.c:1393:1: warning: the frame size of 1436 bytes is
 larger than 1280 bytes

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0da0a8a0a0e1845f495431c3d8d733d2bbf9e9e5
commit: 6d25a633ea68a103c7293d16eb69a7d4689075ad lib: Prepare zstd for preboot environment, improve performance
date:   6 months ago
config: parisc-randconfig-r026-20210117 (attached as .config)
compiler: hppa-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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d25a633ea68a103c7293d16eb69a7d4689075ad
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 6d25a633ea68a103c7293d16eb69a7d4689075ad
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 

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

All warnings (new ones prefixed by >>):

   lib/zstd/compress.c:434:8: warning: no previous prototype for 'ZSTD_noCompressBlock' [-Wmissing-prototypes]
     434 | size_t ZSTD_noCompressBlock(void *dst, size_t dstCapacity, const void *src, size_t srcSize)
         |        ^~~~~~~~~~~~~~~~~~~~
   lib/zstd/compress.c:2252:6: warning: no previous prototype for 'ZSTD_compressBlock_greedy_extDict' [-Wmissing-prototypes]
    2252 | void ZSTD_compressBlock_greedy_extDict(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_extDict_generic(ctx, src, srcSize, 0, 0); }
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   lib/zstd/compress.c:2982:15: warning: no previous prototype for 'ZSTD_createCStream_advanced' [-Wmissing-prototypes]
    2982 | ZSTD_CStream *ZSTD_createCStream_advanced(ZSTD_customMem customMem)
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from lib/zstd/compress.c:23:
   lib/zstd/zstd_internal.h:83:21: warning: 'ZSTD_did_fieldSize' defined but not used [-Wunused-const-variable=]
      83 | static const size_t ZSTD_did_fieldSize[4] = {0, 1, 2, 4};
         |                     ^~~~~~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:82:21: warning: 'ZSTD_fcs_fieldSize' defined but not used [-Wunused-const-variable=]
      82 | static const size_t ZSTD_fcs_fieldSize[4] = {0, 2, 4, 8};
         |                     ^~~~~~~~~~~~~~~~~~
   In file included from lib/zstd/error_private.h:26,
                    from lib/zstd/bitstream.h:53,
                    from lib/zstd/fse.h:228,
                    from lib/zstd/compress.c:20:
   include/linux/zstd.h:798:21: warning: 'ZSTD_skippableHeaderSize' defined but not used [-Wunused-const-variable=]
     798 | static const size_t ZSTD_skippableHeaderSize = 8;
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/zstd.h:795:21: warning: 'ZSTD_frameHeaderSize_min' defined but not used [-Wunused-const-variable=]
     795 | static const size_t ZSTD_frameHeaderSize_min = ZSTD_FRAMEHEADERSIZE_MIN;
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/zstd.h:794:21: warning: 'ZSTD_frameHeaderSize_prefix' defined but not used [-Wunused-const-variable=]
     794 | static const size_t ZSTD_frameHeaderSize_prefix = 5;
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   lib/zstd/compress.c: In function 'ZSTD_compressBlock_doubleFast':
>> lib/zstd/compress.c:1393:1: warning: the frame size of 1436 bytes is larger than 1280 bytes [-Wframe-larger-than=]
    1393 | }
         | ^


vim +1393 lib/zstd/compress.c

73f3d1b48f5069d4 Nick Terrell 2017-08-09  1382  
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1383  static void ZSTD_compressBlock_doubleFast(ZSTD_CCtx *ctx, const void *src, size_t srcSize)
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1384  {
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1385  	const U32 mls = ctx->params.cParams.searchLength;
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1386  	switch (mls) {
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1387  	default: /* includes case 3 */
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1388  	case 4: ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 4); return;
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1389  	case 5: ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 5); return;
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1390  	case 6: ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 6); return;
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1391  	case 7: ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 7); return;
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1392  	}
73f3d1b48f5069d4 Nick Terrell 2017-08-09 @1393  }
73f3d1b48f5069d4 Nick Terrell 2017-08-09  1394  

:::::: The code at line 1393 was first introduced by commit
:::::: 73f3d1b48f5069d46ba48aa28c2898dc93185560 lib: Add zstd modules

:::::: TO: Nick Terrell <terrelln@...com>
:::::: CC: Chris Mason <clm@...com>

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

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