arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:126:12: warning: no previous prototype for function 'ZSTD_createDCtx_advanced'

From: kernel test robot
Date: Wed Sep 01 2021 - 22:30:20 EST

Hi Paul,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7c636d4d20f8c5acfbfbc60f326fddb0e1cf5daa
commit: a510b616131f85215ba156ed67e5ed1c0701f80f MIPS: Add support for ZSTD-compressed kernels
date: 12 months ago
config: mips-randconfig-r015-20210901 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4b1fde8a2b681dad2ce0c082a5d6422caa06b0bc)
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
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a510b616131f85215ba156ed67e5ed1c0701f80f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout a510b616131f85215ba156ed67e5ed1c0701f80f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips

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

All warnings (new ones prefixed by >>):

arch/mips/boot/compressed/decompress.c:38:6: warning: no previous prototype for function 'error' [-Wmissing-prototypes]
void error(char *x)
^
arch/mips/boot/compressed/decompress.c:38:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void error(char *x)
^
static
In file included from arch/mips/boot/compressed/decompress.c:76:
In file included from arch/mips/boot/compressed/../../../../lib/decompress_unzstd.c:75:
>> arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:126:12: warning: no previous prototype for function 'ZSTD_createDCtx_advanced' [-Wmissing-prototypes]
ZSTD_DCtx *ZSTD_createDCtx_advanced(ZSTD_customMem customMem)
^
arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:126:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
ZSTD_DCtx *ZSTD_createDCtx_advanced(ZSTD_customMem customMem)
^
static
>> arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:394:8: warning: no previous prototype for function 'ZSTD_getcBlockSize' [-Wmissing-prototypes]
size_t ZSTD_getcBlockSize(const void *src, size_t srcSize, blockProperties_t *bpPtr)
^
arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:394:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
size_t ZSTD_getcBlockSize(const void *src, size_t srcSize, blockProperties_t *bpPtr)
^
static
>> arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:432:8: warning: no previous prototype for function 'ZSTD_decodeLiteralsBlock' [-Wmissing-prototypes]
size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
^
arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:432:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
^
static
>> arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:794:8: warning: no previous prototype for function 'ZSTD_decodeSeqHeaders' [-Wmissing-prototypes]
size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx *dctx, int *nbSeqPtr, const void *src, size_t srcSize)
^
arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:794:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx *dctx, int *nbSeqPtr, const void *src, size_t srcSize)
^
static
>> arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:1497:8: warning: no previous prototype for function 'ZSTD_generateNxBytes' [-Wmissing-prototypes]
size_t ZSTD_generateNxBytes(void *dst, size_t dstCapacity, BYTE byte, size_t length)
^
arch/mips/boot/compressed/../../../../lib/zstd/decompress.c:1497:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
size_t ZSTD_generateNxBytes(void *dst, size_t dstCapacity, BYTE byte, size_t length)
^
static
arch/mips/boot/compressed/decompress.c:81:6: warning: no previous prototype for function '__stack_chk_fail' [-Wmissing-prototypes]
void __stack_chk_fail(void)
^
arch/mips/boot/compressed/decompress.c:81:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __stack_chk_fail(void)
^
static
arch/mips/boot/compressed/decompress.c:86:6: warning: no previous prototype for function 'decompress_kernel' [-Wmissing-prototypes]
void decompress_kernel(unsigned long boot_heap_start)
^
arch/mips/boot/compressed/decompress.c:86:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void decompress_kernel(unsigned long boot_heap_start)
^
static
8 warnings generated.


vim +/ZSTD_createDCtx_advanced +126 arch/mips/boot/compressed/../../../../lib/zstd/decompress.c

73f3d1b48f5069 Nick Terrell 2017-08-09 125
73f3d1b48f5069 Nick Terrell 2017-08-09 @126 ZSTD_DCtx *ZSTD_createDCtx_advanced(ZSTD_customMem customMem)
73f3d1b48f5069 Nick Terrell 2017-08-09 127 {
73f3d1b48f5069 Nick Terrell 2017-08-09 128 ZSTD_DCtx *dctx;
73f3d1b48f5069 Nick Terrell 2017-08-09 129
73f3d1b48f5069 Nick Terrell 2017-08-09 130 if (!customMem.customAlloc || !customMem.customFree)
73f3d1b48f5069 Nick Terrell 2017-08-09 131 return NULL;
73f3d1b48f5069 Nick Terrell 2017-08-09 132
73f3d1b48f5069 Nick Terrell 2017-08-09 133 dctx = (ZSTD_DCtx *)ZSTD_malloc(sizeof(ZSTD_DCtx), customMem);
73f3d1b48f5069 Nick Terrell 2017-08-09 134 if (!dctx)
73f3d1b48f5069 Nick Terrell 2017-08-09 135 return NULL;
73f3d1b48f5069 Nick Terrell 2017-08-09 136 memcpy(&dctx->customMem, &customMem, sizeof(customMem));
73f3d1b48f5069 Nick Terrell 2017-08-09 137 ZSTD_decompressBegin(dctx);
73f3d1b48f5069 Nick Terrell 2017-08-09 138 return dctx;
73f3d1b48f5069 Nick Terrell 2017-08-09 139 }
73f3d1b48f5069 Nick Terrell 2017-08-09 140

:::::: The code at line 126 was first introduced by commit
:::::: 73f3d1b48f5069d46ba48aa28c2898dc93185560 lib: Add zstd modules

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

---
0-DAY CI Kernel Test Service, Intel Corporation
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