arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:510:5: warning: no previous prototype for function 'LZ4_decompress_safe_forceExtDict'

kernel test robot
2022-06-26T01:14:43Z

Hi Tiezhu,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0840a7914caa14315a3191178a9f72c742477860
commit: 7e4fd16b38923028b01d3dbadf4ca973d885c53e MIPS: RALINK: Define pci_remap_iospace under CONFIG_PCI_DRIVERS_GENERIC
date: 4 weeks ago
config: mips-randconfig-r035-20220626
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 42a7ddb428c999229491b0effbb1a4059149fba8)
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-mipsel-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e4fd16b38923028b01d3dbadf4ca973d885c53e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7e4fd16b38923028b01d3dbadf4ca973d885c53e
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

arch/mips/boot/compressed/decompress.c:42:6: warning: no previous prototype for function 'error' [-Wmissing-prototypes]
void error(char *x)
^
arch/mips/boot/compressed/decompress.c:42:1: 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:64:
In file included from arch/mips/boot/compressed/../../../../lib/decompress_unlz4.c:10:
>> arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:510:5: warning: no previous prototype for function 'LZ4_decompress_safe_forceExtDict' [-Wmissing-prototypes]
int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
^
arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c:510:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
^
static
arch/mips/boot/compressed/decompress.c:85:6: warning: no previous prototype for function '__stack_chk_fail' [-Wmissing-prototypes]
void __stack_chk_fail(void)
^
arch/mips/boot/compressed/decompress.c:85:1: 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:90:6: warning: no previous prototype for function 'decompress_kernel' [-Wmissing-prototypes]
void decompress_kernel(unsigned long boot_heap_start)
^
arch/mips/boot/compressed/decompress.c:90:1: 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
4 warnings generated.
--
>> arch/mips/boot/compressed/dbg.c:12:13: warning: no previous prototype for function 'putc' [-Wmissing-prototypes]
void __weak putc(char c)
^
arch/mips/boot/compressed/dbg.c:12:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __weak putc(char c)
^
static
>> arch/mips/boot/compressed/dbg.c:16:6: warning: no previous prototype for function 'puts' [-Wmissing-prototypes]
void puts(const char *s)
^
arch/mips/boot/compressed/dbg.c:16:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void puts(const char *s)
^
static
>> arch/mips/boot/compressed/dbg.c:26:6: warning: no previous prototype for function 'puthex' [-Wmissing-prototypes]
void puthex(unsigned long long val)
^
arch/mips/boot/compressed/dbg.c:26:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void puthex(unsigned long long val)
^
static
3 warnings generated.

vim +/LZ4_decompress_safe_forceExtDict +510 arch/mips/boot/compressed/../../../../lib/lz4/lz4_decompress.c

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 510 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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