fs/proc/task_mmu.c:2065:6: error: call to undeclared function 'huge_pte_none'; ISO C99 and later do not support implicit function declarations

fs/proc/task_mmu.c:2065:6: error: call to undeclared function 'huge_pte_none'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/Oscar-Salvador/mm-Add-softleaf_from_pud/20260427-233610
head:   a50a24d8da5140888004ac6386c0a0f6b4d0dd9a
commit: a50a24d8da5140888004ac6386c0a0f6b4d0dd9a mm: Make /proc/pid/pagemap use the new generic pagewalk API
date:   11 days ago
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260508/202605082357.ji6iXTek-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260508/202605082357.ji6iXTek-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/202605082357.ji6iXTek-lkp@intel.com/

All errors (new ones prefixed by >>):

   fs/proc/task_mmu.c:1139:17: warning: unused variable 'curr_addr' [-Wunused-variable]
    1139 |                 unsigned long curr_addr = ptw.curr_addr;
         |                               ^~~~~~~~~
>> fs/proc/task_mmu.c:2065:6: error: call to undeclared function 'huge_pte_none'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2065 |         if (huge_pte_none(ptent)) {
         |             ^
   fs/proc/task_mmu.c:2065:6: note: did you mean 'huge_pte_lock'?
   include/linux/hugetlb.h:1308:27: note: 'huge_pte_lock' declared here
    1308 | static inline spinlock_t *huge_pte_lock(struct hstate *h,
         |                           ^
>> fs/proc/task_mmu.c:2079:3: error: call to undeclared function 'huge_ptep_modify_prot_commit'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2079 |                 huge_ptep_modify_prot_commit(vma, addr, ptep, ptent,
         |                 ^
   fs/proc/task_mmu.c:2079:3: note: did you mean '__ptep_modify_prot_commit'?
   include/linux/pgtable.h:1542:20: note: '__ptep_modify_prot_commit' declared here
    1542 | static inline void __ptep_modify_prot_commit(struct vm_area_struct *vma,
         |                    ^
>> fs/proc/task_mmu.c:2080:11: error: call to undeclared function 'huge_pte_mkuffd_wp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2080 |                                              huge_pte_mkuffd_wp(ptent));
         |                                              ^
   fs/proc/task_mmu.c:2080:11: note: did you mean 'pte_mkuffd_wp'?
   arch/x86/include/asm/pgtable.h:427:21: note: 'pte_mkuffd_wp' declared here
     427 | static inline pte_t pte_mkuffd_wp(pte_t pte)
         |                     ^
>> fs/proc/task_mmu.c:2432:8: error: call to undeclared function 'huge_pte_uffd_wp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2432 |                 if (!huge_pte_uffd_wp(pte))
         |                      ^
   fs/proc/task_mmu.c:2624:5: error: call to undeclared function 'make_uffd_wp_pud'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2624 |                                 make_uffd_wp_pud(ptw.vma, curr_addr, ptw.pudp);
         |                                 ^
   fs/proc/task_mmu.c:2624:5: note: did you mean 'make_uffd_wp_pmd'?
   fs/proc/task_mmu.c:1892:13: note: 'make_uffd_wp_pmd' declared here
    1892 | static void make_uffd_wp_pmd(struct vm_area_struct *vma,
         |             ^
   1 warning and 5 errors generated.


vim +/huge_pte_none +2065 fs/proc/task_mmu.c

52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2057  
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2058  static void make_uffd_wp_huge_pte(struct vm_area_struct *vma,
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2059  				  unsigned long addr, pte_t *ptep,
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2060  				  pte_t ptent)
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2061  {
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2062  	const unsigned long psize = huge_page_size(hstate_vma(vma));
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2063  	softleaf_t entry;
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2064  
12f0cd393369d7 Lorenzo Stoakes      2025-11-27 @2065  	if (huge_pte_none(ptent)) {
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2066  		set_huge_pte_at(vma->vm_mm, addr, ptep,
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2067  				make_pte_marker(PTE_MARKER_UFFD_WP), psize);
12f0cd393369d7 Lorenzo Stoakes      2025-11-27  2068  		return;
12f0cd393369d7 Lorenzo Stoakes      2025-11-27  2069  	}
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2070  
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2071  	entry = softleaf_from_pte(ptent);
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2072  	if (softleaf_is_hwpoison(entry) || softleaf_is_marker(entry))
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2073  		return;
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2074  
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2075  	if (softleaf_is_migration(entry))
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2076  		set_huge_pte_at(vma->vm_mm, addr, ptep,
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2077  				pte_swp_mkuffd_wp(ptent), psize);
03bfbc3ad6e496 Lorenzo Stoakes      2025-11-10  2078  	else
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21 @2079  		huge_ptep_modify_prot_commit(vma, addr, ptep, ptent,
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21 @2080  					     huge_pte_mkuffd_wp(ptent));
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2081  }
52526ca7fdb905 Muhammad Usama Anjum 2023-08-21  2082  

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