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Subjectarch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:506:5: warning: no previous prototype for 'LZ4_decompress_safe_forceExtDict'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 34e047aa16c0123bbae8e2f6df33e5ecc1f56601
commit: baec970aa5ba11099ad7a91773350c91fb2113f0 mips: Add N64 machine type
date: 1 year, 2 months ago
config: mips-randconfig-r001-20220319 (https://download.01.org/0day-ci/archive/20220320/202203200545.zUPhx82w-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 11.2.0
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=baec970aa5ba11099ad7a91773350c91fb2113f0
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout baec970aa5ba11099ad7a91773350c91fb2113f0
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

arch/mips/boot/compressed/decompress.c:38:6: warning: no previous prototype for 'error' [-Wmissing-prototypes]
38 | void error(char *x)
| ^~~~~
In file included from arch/mips/boot/compressed/../../../../lib/decompress_unlz4.c:10,
from arch/mips/boot/compressed/decompress.c:60:
arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:484:5: warning: no previous prototype for 'LZ4_decompress_safe_withPrefix64k' [-Wmissing-prototypes]
484 | int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:506:5: warning: no previous prototype for 'LZ4_decompress_safe_forceExtDict' [-Wmissing-prototypes]
506 | int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/mips/boot/compressed/decompress.c:81:6: warning: no previous prototype for '__stack_chk_fail' [-Wmissing-prototypes]
81 | void __stack_chk_fail(void)
| ^~~~~~~~~~~~~~~~
arch/mips/boot/compressed/decompress.c:86:6: warning: no previous prototype for 'decompress_kernel' [-Wmissing-prototypes]
86 | void decompress_kernel(unsigned long boot_heap_start)
| ^~~~~~~~~~~~~~~~~


vim +/LZ4_decompress_safe_forceExtDict +506 arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c

cffb78b0e0b3a3 Kyungsik Lee 2013-07-08 505
2209fda323e2fd Gao Xiang 2018-10-30 @506 int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
2209fda323e2fd Gao Xiang 2018-10-30 507 int compressedSize, int maxOutputSize,
2209fda323e2fd Gao Xiang 2018-10-30 508 const void *dictStart, size_t dictSize)
2209fda323e2fd Gao Xiang 2018-10-30 509 {
2209fda323e2fd Gao Xiang 2018-10-30 510 return LZ4_decompress_generic(source, dest,
2209fda323e2fd Gao Xiang 2018-10-30 511 compressedSize, maxOutputSize,
2209fda323e2fd Gao Xiang 2018-10-30 512 endOnInputSize, decode_full_block,
2209fda323e2fd Gao Xiang 2018-10-30 513 usingExtDict, (BYTE *)dest,
2209fda323e2fd Gao Xiang 2018-10-30 514 (const BYTE *)dictStart, dictSize);
2209fda323e2fd Gao Xiang 2018-10-30 515 }
2209fda323e2fd Gao Xiang 2018-10-30 516

:::::: The code at line 506 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>

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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