[ardb:x86-pie-v2 6/15] arch/x86/include/asm/processor.h:416:16: error: implicit declaration of function 'per_cpu_offset'

[kernel test robot <lkp@intel.com>]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git x86-pie-v2
head:   29ffb3695f4c4dbeaf110a752cee0d918e3b6519
commit: e68ec274b0f929ef4ccb4be27152a2464a103f74 [6/15] x86: Use stack protector with guard symbol if supported
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20240120/202401201228.lBmoRWMP-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240120/202401201228.lBmoRWMP-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401201228.lBmoRWMP-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:60,
                    from include/linux/spinlock.h:60,
                    from include/linux/swait.h:7,
                    from include/linux/completion.h:12,
                    from include/linux/crypto.h:15,
                    from arch/x86/kernel/asm-offsets.c:9:
   arch/x86/include/asm/processor.h: In function 'cpu_kernelmode_gs_base':
>> arch/x86/include/asm/processor.h:416:16: error: implicit declaration of function 'per_cpu_offset' [-Werror=implicit-function-declaration]
     416 |         return per_cpu_offset(cpu);
         |                ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
   make[3]: *** [scripts/Makefile.build:116: arch/x86/kernel/asm-offsets.s] Error 1
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1191: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:234: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:234: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/per_cpu_offset +416 arch/x86/include/asm/processor.h

   413	
   414	static inline unsigned long cpu_kernelmode_gs_base(int cpu)
   415	{
 > 416		return per_cpu_offset(cpu);
   417	}
   418	

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