lib/zstd/compress/zstd_opt.c:1324:15: warning: stack frame size (2224) exceeds limit (2048) in 'ZSTD_compressBlock_opt0'

From: kernel test robot <lkp@intel.com>
To: Nick Terrell <terrelln@fb.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	linux-kernel@vger.kernel.org
Subject: lib/zstd/compress/zstd_opt.c:1324:15: warning: stack frame size (2224) exceeds limit (2048) in 'ZSTD_compressBlock_opt0'
Date: Fri, 9 Jun 2023 04:14:57 +0800	[thread overview]
Message-ID: <202306090430.17nVObx2-lkp@intel.com> (raw)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   25041a4c02c7cf774d8b6ed60586fd64f1cdaa81
commit: 2aa14b1ab2c41a4fe41efae80d58bb77da91f19f zstd: import usptream v1.5.2
date:   8 months ago
config: riscv-randconfig-r012-20230608 (https://download.01.org/0day-ci/archive/20230609/202306090430.17nVObx2-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2aa14b1ab2c41a4fe41efae80d58bb77da91f19f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 2aa14b1ab2c41a4fe41efae80d58bb77da91f19f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash fs/f2fs/ lib/zstd/

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306090430.17nVObx2-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> lib/zstd/compress/zstd_opt.c:1324:15: warning: stack frame size (2224) exceeds limit (2048) in 'ZSTD_compressBlock_opt0' [-Wframe-larger-than]
   static size_t ZSTD_compressBlock_opt0(
                 ^
>> lib/zstd/compress/zstd_opt.c:1331:15: warning: stack frame size (2128) exceeds limit (2048) in 'ZSTD_compressBlock_opt2' [-Wframe-larger-than]
   static size_t ZSTD_compressBlock_opt2(
                 ^
   2 warnings generated.

vim +/ZSTD_compressBlock_opt0 +1324 lib/zstd/compress/zstd_opt.c

  1323	
> 1324	static size_t ZSTD_compressBlock_opt0(
  1325	        ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
  1326	        const void* src, size_t srcSize, const ZSTD_dictMode_e dictMode)
  1327	{
  1328	    return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 0 /* optLevel */, dictMode);
  1329	}
  1330	
> 1331	static size_t ZSTD_compressBlock_opt2(
  1332	        ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
  1333	        const void* src, size_t srcSize, const ZSTD_dictMode_e dictMode)
  1334	{
  1335	    return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /* optLevel */, dictMode);
  1336	}
  1337	

-- 
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https://github.com/intel/lkp-tests/wiki