linux-kernel - kernel/livepatch/transition.c:17:1: sparse: sparse: symbol '__pcpu_scope_klp_stack_entries' was not declared. Should it be static?

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Message-ID: <202305171329.i0UQ4TJa-lkp@intel.com>
Date:   Wed, 17 May 2023 14:09:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>
Subject: kernel/livepatch/transition.c:17:1: sparse: sparse: symbol
 '__pcpu_scope_klp_stack_entries' was not declared. Should it be static?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6
commit: e92606fa172f63a26054885b9715be86c643229d livepatch: Convert stack entries array to percpu
date:   8 weeks ago
config: powerpc-randconfig-s033-20230517
compiler: powerpc-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e92606fa172f63a26054885b9715be86c643229d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e92606fa172f63a26054885b9715be86c643229d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash kernel/livepatch/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305171329.i0UQ4TJa-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/livepatch/transition.c:17:1: sparse: sparse: symbol '__pcpu_scope_klp_stack_entries' was not declared. Should it be static?

vim +/__pcpu_scope_klp_stack_entries +17 kernel/livepatch/transition.c

    16	
  > 17	#define MAX_STACK_ENTRIES  100
    18	DEFINE_PER_CPU(unsigned long[MAX_STACK_ENTRIES], klp_stack_entries);
    19	

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

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