linux-kernel - arch/powerpc/kernel/time.c:169:29: error: unused function 'read

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Message-ID: <202308121120.u2d3YPVt-lkp@intel.com>
Date:   Sat, 12 Aug 2023 11:59:55 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: arch/powerpc/kernel/time.c:169:29: error: unused function
 'read_spurr'

Hi Nathan,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   190bf7b14b0cf3df19c059061be032bd8994a597
commit: 015d98149b326e0f1f02e44413112ca8b4330543 powerpc/barrier: Avoid collision with clang's __lwsync macro
date:   2 years, 2 months ago
config: powerpc-randconfig-r011-20230812 (https://download.01.org/0day-ci/archive/20230812/202308121120.u2d3YPVt-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230812/202308121120.u2d3YPVt-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308121120.u2d3YPVt-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/powerpc/kernel/time.c:169:29: error: unused function 'read_spurr' [-Werror,-Wunused-function]
     169 | static inline unsigned long read_spurr(unsigned long tb)
         |                             ^
   1 error generated.
--
>> arch/powerpc/sysdev/grackle.c:26:20: error: unused function 'grackle_set_stg' [-Werror,-Wunused-function]
      26 | static inline void grackle_set_stg(struct pci_controller* bp, int enable)
         |                    ^
   1 error generated.


vim +/read_spurr +169 arch/powerpc/kernel/time.c

c6622f63db86fc Paul Mackerras   2006-02-24  164  
c6622f63db86fc Paul Mackerras   2006-02-24  165  /*
cf9efce0ce3136 Paul Mackerras   2010-08-26  166   * Read the SPURR on systems that have it, otherwise the PURR,
cf9efce0ce3136 Paul Mackerras   2010-08-26  167   * or if that doesn't exist return the timebase value passed in.
c6622f63db86fc Paul Mackerras   2006-02-24  168   */
abcff86df2d2ec Christophe Leroy 2018-08-02 @169  static inline unsigned long read_spurr(unsigned long tb)
c6622f63db86fc Paul Mackerras   2006-02-24  170  {
cf9efce0ce3136 Paul Mackerras   2010-08-26  171  	if (cpu_has_feature(CPU_FTR_SPURR))
cf9efce0ce3136 Paul Mackerras   2010-08-26  172  		return mfspr(SPRN_SPURR);
c6622f63db86fc Paul Mackerras   2006-02-24  173  	if (cpu_has_feature(CPU_FTR_PURR))
c6622f63db86fc Paul Mackerras   2006-02-24  174  		return mfspr(SPRN_PURR);
cf9efce0ce3136 Paul Mackerras   2010-08-26  175  	return tb;
c6622f63db86fc Paul Mackerras   2006-02-24  176  }
c6622f63db86fc Paul Mackerras   2006-02-24  177  

:::::: The code at line 169 was first introduced by commit
:::::: abcff86df2d2ec0a0ca9470fa5d2a184af18928a powerpc/time: Only set CONFIG_ARCH_HAS_SCALED_CPUTIME on PPC64

:::::: TO: Christophe Leroy <christophe.leroy@....fr>
:::::: CC: Michael Ellerman <mpe@...erman.id.au>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki