Re: [PATCH v3 11/11] selftests/mm: add PMD swap entry tests

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

Hi Usama,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Usama-Arif/mm-add-PMD-swap-entry-detection-support/20260704-014151
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260703173903.3789516-12-usama.arif%40linux.dev
patch subject: [PATCH v3 11/11] selftests/mm: add PMD swap entry tests
config: i386-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260704/202607041039.WHXO0OYv-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260704/202607041039.WHXO0OYv-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/202607041039.WHXO0OYv-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from ./include/linux/mm.h:31,
                    from ./include/linux/memcontrol.h:21,
                    from ./include/linux/swap.h:9,
                    from ./include/linux/suspend.h:5,
                    from arch/x86/kernel/asm-offsets.c:14:
>> ./include/linux/pgtable.h:1921:21: error: redefinition of 'pmd_swp_mkexclusive'
    1921 | static inline pmd_t pmd_swp_mkexclusive(pmd_t pmd)
         |                     ^~~~~~~~~~~~~~~~~~~
   In file included from ./arch/x86/include/asm/tlbflush.h:17,
                    from ./arch/x86/include/asm/uaccess.h:17,
                    from ./include/linux/uaccess.h:13,
                    from ./include/linux/sched/task.h:13,
                    from ./include/linux/sched/signal.h:9,
                    from ./include/linux/rcuwait.h:6,
                    from ./include/linux/percpu-rwsem.h:7,
                    from ./include/linux/fs/super_types.h:13,
                    from ./include/linux/fs/super.h:5,
                    from ./include/linux/fs.h:5,
                    from ./include/linux/cgroup.h:17,
                    from ./include/linux/memcontrol.h:13:
   ./arch/x86/include/asm/pgtable.h:1532:21: note: previous definition of 'pmd_swp_mkexclusive' with type 'pmd_t(pmd_t)'
    1532 | static inline pmd_t pmd_swp_mkexclusive(pmd_t pmd)
         |                     ^~~~~~~~~~~~~~~~~~~
>> ./include/linux/pgtable.h:1926:20: error: conflicting types for 'pmd_swp_exclusive'; have 'bool(pmd_t)' {aka '_Bool(pmd_t)'}
    1926 | static inline bool pmd_swp_exclusive(pmd_t pmd)
         |                    ^~~~~~~~~~~~~~~~~
   ./arch/x86/include/asm/pgtable.h:1537:19: note: previous definition of 'pmd_swp_exclusive' with type 'int(pmd_t)'
    1537 | static inline int pmd_swp_exclusive(pmd_t pmd)
         |                   ^~~~~~~~~~~~~~~~~
>> ./include/linux/pgtable.h:1931:21: error: redefinition of 'pmd_swp_clear_exclusive'
    1931 | static inline pmd_t pmd_swp_clear_exclusive(pmd_t pmd)
         |                     ^~~~~~~~~~~~~~~~~~~~~~~
   ./arch/x86/include/asm/pgtable.h:1542:21: note: previous definition of 'pmd_swp_clear_exclusive' with type 'pmd_t(pmd_t)'
    1542 | static inline pmd_t pmd_swp_clear_exclusive(pmd_t pmd)
         |                     ^~~~~~~~~~~~~~~~~~~~~~~


vim +/pmd_swp_mkexclusive +1921 ./include/linux/pgtable.h

  1919	
  1920	#ifndef CONFIG_ARCH_SUPPORTS_PMD_SOFTLEAF
> 1921	static inline pmd_t pmd_swp_mkexclusive(pmd_t pmd)
  1922	{
  1923		return pmd;
  1924	}
  1925	
> 1926	static inline bool pmd_swp_exclusive(pmd_t pmd)
  1927	{
  1928		return false;
  1929	}
  1930	
> 1931	static inline pmd_t pmd_swp_clear_exclusive(pmd_t pmd)
  1932	{
  1933		return pmd;
  1934	}
  1935	#endif
  1936	

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