linux-kernel - drivers/hwmon/ltq-cputemp.c:23:2: error: call to undeclared function 'ltq_cgu_w32'; ISO C99 and later do not support implicit function declarations

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Date:   Sun, 8 May 2022 04:54:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Alex Shi <alexs@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>
Subject: drivers/hwmon/ltq-cputemp.c:23:2: error: call to undeclared function
 'ltq_cgu_w32'; ISO C99 and later do not support implicit function
 declarations

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   30c8e80f79329617012f07b09b70114592092ea4
commit: e8c07082a810fbb9db303a2b66b66b8d7e588b53 Kbuild: move to -std=gnu11
date:   8 weeks ago
config: mips-randconfig-r022-20220507 (https://download.01.org/0day-ci/archive/20220508/202205080416.vzIXy16B-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af4cf1c6b8ed0d8102fc5e69acdc2fcbbcdaa9a7)
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=e8c07082a810fbb9db303a2b66b66b8d7e588b53
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e8c07082a810fbb9db303a2b66b66b8d7e588b53
        # 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 as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/hwmon/ltq-cputemp.c:23:2: error: call to undeclared function 'ltq_cgu_w32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) | CGU_TEMP_PD, CGU_GPHY1_CR);
           ^
>> drivers/hwmon/ltq-cputemp.c:23:14: error: call to undeclared function 'ltq_cgu_r32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) | CGU_TEMP_PD, CGU_GPHY1_CR);
                       ^
   drivers/hwmon/ltq-cputemp.c:28:2: error: call to undeclared function 'ltq_cgu_w32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) & ~CGU_TEMP_PD, CGU_GPHY1_CR);
           ^
   drivers/hwmon/ltq-cputemp.c:28:14: error: call to undeclared function 'ltq_cgu_r32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) & ~CGU_TEMP_PD, CGU_GPHY1_CR);
                       ^
   drivers/hwmon/ltq-cputemp.c:39:12: error: call to undeclared function 'ltq_cgu_r32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                   value = (ltq_cgu_r32(CGU_GPHY1_CR) >> 9) & 0x01FF;
                            ^
   drivers/hwmon/ltq-cputemp.c:92:24: error: use of undeclared identifier 'SOC_TYPE_VR9_2'
           if (ltq_soc_type() != SOC_TYPE_VR9_2)
                                 ^
   6 errors generated.


vim +/ltq_cgu_w32 +23 drivers/hwmon/ltq-cputemp.c

7074d0a9275860 Florian Eckert 2017-09-01  20  
7074d0a9275860 Florian Eckert 2017-09-01  21  static void ltq_cputemp_enable(void)
7074d0a9275860 Florian Eckert 2017-09-01  22  {
7074d0a9275860 Florian Eckert 2017-09-01 @23  	ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) | CGU_TEMP_PD, CGU_GPHY1_CR);
7074d0a9275860 Florian Eckert 2017-09-01  24  }
7074d0a9275860 Florian Eckert 2017-09-01  25  

:::::: The code at line 23 was first introduced by commit
:::::: 7074d0a92758603369655ef5d4f49e6caaae0b4e hwmon: (ltq-cputemp) add cpu temp sensor driver

:::::: TO: Florian Eckert <fe@....tdt.de>
:::::: CC: Guenter Roeck <linux@...ck-us.net>

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