[openeuler:OLK-5.10 2712/2712] drivers/firmware/efi/libstub/../../../../lib/lz4/lz4_decompress.c:488:5: warning: no previous prototype for 'LZ4_decompress_safe_withPrefix64k'

[kernel test robot <lkp@intel.com>]

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   8af3d979a0d4bd2f18127293d843277437e74c6e
commit: e467807275555a062593aa1e89f3201644ef0ea5 [2712/2712] efi/libstub: implement generic EFI zboot
config: arm64-randconfig-001-20250123 (https://download.01.org/0day-ci/archive/20250123/202501231827.ODrxloSs-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250123/202501231827.ODrxloSs-lkp@intel.com/reproduce)

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/202501231827.ODrxloSs-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/firmware/efi/libstub/../../../../lib/decompress_unlz4.c:10,
                    from drivers/firmware/efi/libstub/zboot.c:17:
>> drivers/firmware/efi/libstub/../../../../lib/lz4/lz4_decompress.c:488:5: warning: no previous prototype for 'LZ4_decompress_safe_withPrefix64k' [-Wmissing-prototypes]
     488 | int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/firmware/efi/libstub/../../../../lib/lz4/lz4_decompress.c:510:5: warning: no previous prototype for 'LZ4_decompress_safe_forceExtDict' [-Wmissing-prototypes]
     510 | int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/firmware/efi/libstub/zboot.c:162:1: warning: no previous prototype for 'efi_zboot_entry' [-Wmissing-prototypes]
     162 | efi_zboot_entry(efi_handle_t handle, efi_system_table_t *systab)
         | ^~~~~~~~~~~~~~~


vim +/LZ4_decompress_safe_withPrefix64k +488 drivers/firmware/efi/libstub/../../../../lib/lz4/lz4_decompress.c

2209fda323e2fd Gao Xiang    2018-10-30  487  
2209fda323e2fd Gao Xiang    2018-10-30 @488  int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
2209fda323e2fd Gao Xiang    2018-10-30  489  				      int compressedSize, int maxOutputSize)
2209fda323e2fd Gao Xiang    2018-10-30  490  {
2209fda323e2fd Gao Xiang    2018-10-30  491  	return LZ4_decompress_generic(source, dest,
2209fda323e2fd Gao Xiang    2018-10-30  492  				      compressedSize, maxOutputSize,
2209fda323e2fd Gao Xiang    2018-10-30  493  				      endOnInputSize, decode_full_block,
2209fda323e2fd Gao Xiang    2018-10-30  494  				      withPrefix64k,
2209fda323e2fd Gao Xiang    2018-10-30  495  				      (BYTE *)dest - 64 * KB, NULL, 0);
2209fda323e2fd Gao Xiang    2018-10-30  496  }
2209fda323e2fd Gao Xiang    2018-10-30  497  
2209fda323e2fd Gao Xiang    2018-10-30  498  static int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest,
2209fda323e2fd Gao Xiang    2018-10-30  499  					       int compressedSize,
2209fda323e2fd Gao Xiang    2018-10-30  500  					       int maxOutputSize,
2209fda323e2fd Gao Xiang    2018-10-30  501  					       size_t prefixSize)
2209fda323e2fd Gao Xiang    2018-10-30  502  {
2209fda323e2fd Gao Xiang    2018-10-30  503  	return LZ4_decompress_generic(source, dest,
2209fda323e2fd Gao Xiang    2018-10-30  504  				      compressedSize, maxOutputSize,
2209fda323e2fd Gao Xiang    2018-10-30  505  				      endOnInputSize, decode_full_block,
2209fda323e2fd Gao Xiang    2018-10-30  506  				      noDict,
2209fda323e2fd Gao Xiang    2018-10-30  507  				      (BYTE *)dest - prefixSize, NULL, 0);
4e1a33b105ddf2 Sven Schmidt 2017-02-24  508  }
cffb78b0e0b3a3 Kyungsik Lee 2013-07-08  509  
2209fda323e2fd Gao Xiang    2018-10-30 @510  int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
2209fda323e2fd Gao Xiang    2018-10-30  511  				     int compressedSize, int maxOutputSize,
2209fda323e2fd Gao Xiang    2018-10-30  512  				     const void *dictStart, size_t dictSize)
2209fda323e2fd Gao Xiang    2018-10-30  513  {
2209fda323e2fd Gao Xiang    2018-10-30  514  	return LZ4_decompress_generic(source, dest,
2209fda323e2fd Gao Xiang    2018-10-30  515  				      compressedSize, maxOutputSize,
2209fda323e2fd Gao Xiang    2018-10-30  516  				      endOnInputSize, decode_full_block,
2209fda323e2fd Gao Xiang    2018-10-30  517  				      usingExtDict, (BYTE *)dest,
2209fda323e2fd Gao Xiang    2018-10-30  518  				      (const BYTE *)dictStart, dictSize);
2209fda323e2fd Gao Xiang    2018-10-30  519  }
2209fda323e2fd Gao Xiang    2018-10-30  520  

:::::: The code at line 488 was first introduced by commit
:::::: 2209fda323e2fd2a2d0885595fd5097717f8d2aa lib/lz4: update LZ4 decompressor module

:::::: TO: Gao Xiang <gaoxiang25@huawei.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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