linux-kernel - [ardb:arm64-ro-page-tables-pkvm-v5.17 11/26] include/linux/pgtable.h:83:29: error: redefinition of 'p4d

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Date:   Sat, 29 Jan 2022 06:15:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [ardb:arm64-ro-page-tables-pkvm-v5.17 11/26]
 include/linux/pgtable.h:83:29: error: redefinition of 'p4d_index'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git arm64-ro-page-tables-pkvm-v5.17
head:   b38f2df95cbf61e70bc32017da5318d1cb03e3e3
commit: 213a01959c0f951a020c1affdab630af1f4077ee [11/26] mm: add default definition of p4d_index()
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220129/202201290655.jMtwgXZW-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=213a01959c0f951a020c1affdab630af1f4077ee
        git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
        git fetch --no-tags ardb arm64-ro-page-tables-pkvm-v5.17
        git checkout 213a01959c0f951a020c1affdab630af1f4077ee
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 prepare

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 >>):

   In file included from include/linux/kasan.h:30,
                    from include/linux/slab.h:136,
                    from include/linux/crypto.h:20,
                    from arch/x86/kernel/asm-offsets.c:9:
>> include/linux/pgtable.h:83:29: error: redefinition of 'p4d_index'
      83 | static inline unsigned long p4d_index(unsigned long address)
         |                             ^~~~~~~~~
   In file included from include/linux/pgtable.h:6,
                    from include/linux/kasan.h:30,
                    from include/linux/slab.h:136,
                    from include/linux/crypto.h:20,
                    from arch/x86/kernel/asm-offsets.c:9:
   arch/x86/include/asm/pgtable.h:904:29: note: previous definition of 'p4d_index' was here
     904 | static inline unsigned long p4d_index(unsigned long address)
         |                             ^~~~~~~~~
   make[2]: *** [scripts/Makefile.build:121: arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1191: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:219: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/p4d_index +83 include/linux/pgtable.h

    81	
    82	#ifndef p4d_index
  > 83	static inline unsigned long p4d_index(unsigned long address)
    84	{
    85		return (address >> P4D_SHIFT) & (PTRS_PER_P4D - 1);
    86	}
    87	#define p4d_index p4d_index
    88	#endif
    89	

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