Hi Zhenyu,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.6]
[cannot apply to arm64/for-next/core linus/master arc/for-next next-20200331]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Zhenyu-Ye/arm64-tlb-add-support-for-TTL-feature/20200401-031750
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: nios2-3c120_defconfig (attached as .config)
compiler: nios2-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=9.3.0 make.cross ARCH=nios2 

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

All errors (new ones prefixed by >>):

   In file included from arch/nios2/include/asm/pgtable.h:22,
                    from include/linux/mm.h:94,
                    from include/linux/pid_namespace.h:7,
                    from include/linux/ptrace.h:10,
                    from arch/nios2/kernel/asm-offsets.c:9:
   arch/nios2/include/asm/tlbflush.h: In function 'flush_tlb_page':
>> arch/nios2/include/asm/tlbflush.h:34:29: error: 'tlb_start' undeclared (first use in this function); did you mean 'va_start'?
      34 |  flush_tlb_range(NULL, vma, tlb_start, tlb_end);
         |                             ^~~~~~~~~
         |                             va_start
   arch/nios2/include/asm/tlbflush.h:34:29: note: each undeclared identifier is reported only once for each function it appears in
>> arch/nios2/include/asm/tlbflush.h:34:40: error: 'tlb_end' undeclared (first use in this function); did you mean '_end'?
      34 |  flush_tlb_range(NULL, vma, tlb_start, tlb_end);
         |                                        ^~~~~~~
         |                                        _end
   make[2]: *** [scripts/Makefile.build:101: arch/nios2/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1112: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:179: sub-make] Error 2
   36 real  5 user  12 sys  50.66% cpu 	make prepare

vim +34 arch/nios2/include/asm/tlbflush.h

    30	
    31	static inline void flush_tlb_page(struct vm_area_struct *vma,
    32					  unsigned long address)
    33	{
  > 34		flush_tlb_range(NULL, vma, tlb_start, tlb_end);
    35	}
    36	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org