Re: [PATCH 3/3] x86/64/mm: Make 5-level paging support unconditional

From: kernel test robot
Date: Tue Jun 25 2024 - 19:22:36 EST


Hi Kirill,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/x86/core]
[also build test ERROR on tip/master linus/master tip/x86/mm v6.10-rc5 next-20240625]
[cannot apply to tip/auto-latest]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Kirill-A-Shutemov/x86-64-mm-Always-use-dynamic-memory-layout/20240625-183159
base: tip/x86/core
patch link: https://lore.kernel.org/r/20240621164406.256314-4-kirill.shutemov%40linux.intel.com
patch subject: [PATCH 3/3] x86/64/mm: Make 5-level paging support unconditional
config: i386-buildonly-randconfig-004-20240626 (https://download.01.org/0day-ci/archive/20240626/202406260735.rkb4c8N7-lkp@xxxxxxxxx/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240626/202406260735.rkb4c8N7-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406260735.rkb4c8N7-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> arch/x86/mm/pgtable.c:699:5: error: redefinition of 'p4d_set_huge'
699 | int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
| ^~~~~~~~~~~~
In file included from include/linux/mm.h:30,
from arch/x86/mm/pgtable.c:2:
include/linux/pgtable.h:1665:19: note: previous definition of 'p4d_set_huge' with type 'int(p4d_t *, phys_addr_t, pgprot_t)' {aka 'int(p4d_t *, long long unsigned int, struct pgprot)'}
1665 | static inline int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
| ^~~~~~~~~~~~
>> arch/x86/mm/pgtable.c:709:6: error: redefinition of 'p4d_clear_huge'
709 | void p4d_clear_huge(p4d_t *p4d)
| ^~~~~~~~~~~~~~
include/linux/pgtable.h:1669:20: note: previous definition of 'p4d_clear_huge' with type 'void(p4d_t *)'
1669 | static inline void p4d_clear_huge(p4d_t *p4d) { }
| ^~~~~~~~~~~~~~


vim +/p4d_set_huge +699 arch/x86/mm/pgtable.c

6b6378355b9250 Toshi Kani 2015-04-14 692
6b6378355b9250 Toshi Kani 2015-04-14 693 #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 694 /**
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 695 * p4d_set_huge - setup kernel P4D mapping
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 696 *
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 697 * No 512GB pages yet -- always return 0
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 698 */
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 @699 int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 700 {
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 701 return 0;
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 702 }
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 703
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 704 /**
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 705 * p4d_clear_huge - clear kernel P4D mapping when it is set
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 706 *
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 707 * No 512GB pages yet -- always return 0
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 708 */
c8db8c2628afc7 Li kunyu 2022-05-12 @709 void p4d_clear_huge(p4d_t *p4d)
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 710 {
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 711 }
b8504058a06bd1 Kirill A. Shutemov 2017-03-30 712

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