Hi Zhou, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 54ad6c4559d2bcbb5d7a03050b2f417a326a1ce2 commit: 0886320b818787f720824229f153f161c89faf70 [1544/1544] mm/sharepool: Charge Buddy hugepage to memcg config: arm64-randconfig-r131-20250401 (https://download.01.org/0day-ci/archive/20250402/202504020332.I3Yx3nDu-lkp@i...) compiler: aarch64-linux-gcc (GCC) 11.5.0 reproduce: (https://download.01.org/0day-ci/archive/20250402/202504020332.I3Yx3nDu-lkp@i...) 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/202504020332.I3Yx3nDu-lkp@intel.com/ All errors (new ones prefixed by >>): mm/share_pool.c:1086:29: sparse: sparse: incompatible types for operation (<=): mm/share_pool.c:1086:29: sparse: int *num mm/share_pool.c:1086:29: sparse: int mm/share_pool.c:3299:21: sparse: sparse: undefined identifier 'huge_ptep_get' mm/share_pool.c:3299:34: sparse: sparse: invalid initializer mm/share_pool.c:4577:32: sparse: sparse: undefined identifier 'hugetlb_alloc_hugepage' mm/share_pool.c:4585:30: sparse: sparse: undefined identifier 'huge_pte_none' mm/share_pool.c:4606:23: sparse: sparse: undefined identifier 'huge_add_to_page_cache' mm/share_pool.c:4625:14: sparse: sparse: undefined identifier 'huge_pte_none' mm/share_pool.c:4631:9: sparse: sparse: undefined identifier 'set_huge_pte_at' mm/share_pool.c:4633:9: sparse: sparse: undefined identifier 'hugetlb_count_add' mm/share_pool.c:4797:24: sparse: sparse: undefined identifier 'hugetlb_alloc_hugepage' mm/share_pool.c: In function 'mg_sp_group_id_by_pid': mm/share_pool.c:1086:29: warning: ordered comparison of pointer with integer zero [-Wextra] 1086 | if (!spg_ids || num <= 0) | ^~ mm/share_pool.c: In function 'sp_hugetlb_entry': mm/share_pool.c:3299:21: error: implicit declaration of function 'huge_ptep_get' [-Werror=implicit-function-declaration] 3299 | pte_t pte = huge_ptep_get(ptep); | ^~~~~~~~~~~~~ mm/share_pool.c:3299:21: error: invalid initializer mm/share_pool.c: In function 'sharepool_no_page': mm/share_pool.c:4577:32: error: implicit declaration of function 'hugetlb_alloc_hugepage'; did you mean 'vmalloc_hugepage'? [-Werror=implicit-function-declaration] 4577 | page = hugetlb_alloc_hugepage(node_id, HUGETLB_ALLOC_BUDDY); | ^~~~~~~~~~~~~~~~~~~~~~ | vmalloc_hugepage

...

mm/share_pool.c:4577:64: error: 'HUGETLB_ALLOC_BUDDY' undeclared (first use in this function) 4577 | page = hugetlb_alloc_hugepage(node_id, HUGETLB_ALLOC_BUDDY); | ^~~~~~~~~~~~~~~~~~~ mm/share_pool.c:4577:64: note: each undeclared identifier is reported only once for each function it appears in mm/share_pool.c:4585:30: error: implicit declaration of function 'huge_pte_none'; did you mean 'huge_pte_lock'? [-Werror=implicit-function-declaration] 4585 | if (!huge_pte_none(huge_ptep_get(ptep))) { | ^~~~~~~~~~~~~ | huge_pte_lock mm/share_pool.c:4606:23: error: implicit declaration of function 'huge_add_to_page_cache'; did you mean 'add_to_page_cache'? [-Werror=implicit-function-declaration] 4606 | err = huge_add_to_page_cache(page, mapping, idx); | ^~~~~~~~~~~~~~~~~~~~~~ | add_to_page_cache mm/share_pool.c:4631:9: error: implicit declaration of function 'set_huge_pte_at'; did you mean 'set_huge_swap_pte_at'? [-Werror=implicit-function-declaration] 4631 | set_huge_pte_at(mm, haddr, ptep, new_pte); | ^~~~~~~~~~~~~~~ | set_huge_swap_pte_at mm/share_pool.c:4633:9: error: implicit declaration of function 'hugetlb_count_add'; did you mean 'hugetlb_count_sub'? [-Werror=implicit-function-declaration] 4633 | hugetlb_count_add(pages_per_huge_page(h), mm); | ^~~~~~~~~~~~~~~~~ | hugetlb_count_sub mm/share_pool.c: In function 'sp_alloc_pages': mm/share_pool.c:4797:61: error: 'HUGETLB_ALLOC_NONE' undeclared (first use in this function); did you mean 'HUGETLB_ANON_FILE'? 4797 | page = hugetlb_alloc_hugepage(NUMA_NO_NODE, HUGETLB_ALLOC_NONE); | ^~~~~~~~~~~~~~~~~~ | HUGETLB_ANON_FILE cc1: some warnings being treated as errors

vim +/HUGETLB_ALLOC_BUDDY +4577 mm/share_pool.c 4541 4542 vm_fault_t sharepool_no_page(struct mm_struct *mm, 4543 struct vm_area_struct *vma, 4544 struct address_space *mapping, pgoff_t idx, 4545 unsigned long address, pte_t *ptep, unsigned int flags) 4546 { 4547 struct hstate *h = hstate_vma(vma); 4548 vm_fault_t ret = VM_FAULT_SIGBUS; 4549 unsigned long size; 4550 struct page *page; 4551 pte_t new_pte; 4552 spinlock_t *ptl; 4553 unsigned long haddr = address & huge_page_mask(h); 4554 bool new_page = false; 4555 int err; 4556 int node_id; 4557 struct sp_area *spa; 4558 bool charge_hpage = false; 4559 struct mem_cgroup *memcg; 4560 4561 spa = vma->vm_private_data; 4562 if (!spa) { 4563 pr_err("share pool: vma is invalid, not from sp mmap\n"); 4564 return ret; 4565 } 4566 node_id = spa->node_id; 4567 4568 retry: 4569 page = find_lock_page(mapping, idx); 4570 if (!page) { 4571 size = i_size_read(mapping->host) >> huge_page_shift(h); 4572 if (idx >= size) 4573 goto out; 4574 4575 page = alloc_huge_page(vma, haddr, 0); 4576 if (IS_ERR(page)) {

4577 page = hugetlb_alloc_hugepage(node_id, HUGETLB_ALLOC_BUDDY); 4578 if (!page) 4579 page = ERR_PTR(-ENOMEM); 4580 else if (!PageKmemcg(page)) 4581 charge_hpage = true; 4582 } 4583 if (IS_ERR(page)) { 4584 ptl = huge_pte_lock(h, mm, ptep); 4585 if (!huge_pte_none(huge_ptep_get(ptep))) { 4586 ret = 0; 4587 spin_unlock(ptl); 4588 goto out; 4589 } 4590 spin_unlock(ptl); 4591 ret = vmf_error(PTR_ERR(page)); 4592 goto out; 4593 } 4594 4595 if (charge_hpage && 4596 mem_cgroup_try_charge_delay(page, vma->vm_mm, GFP_KERNEL, &memcg, true)) { 4597 put_page(page); 4598 ret = vmf_error(-ENOMEM); 4599 goto out; 4600 } 4601 4602 __SetPageUptodate(page); 4603 new_page = true; 4604 4605 /* sharepool pages are all shared */ 4606 err = huge_add_to_page_cache(page, mapping, idx); 4607 if (err) { 4608 if (charge_hpage) { 4609 mem_cgroup_cancel_charge(page, memcg, true); 4610 charge_hpage = false; 4611 } 4612 put_page(page); 4613 if (err == -EEXIST) 4614 goto retry; 4615 goto out; 4616 } 4617 } 4618 4619 ptl = huge_pte_lock(h, mm, ptep); 4620 size = i_size_read(mapping->host) >> huge_page_shift(h); 4621 if (idx >= size) 4622 goto backout; 4623 4624 ret = 0; 4625 if (!huge_pte_none(huge_ptep_get(ptep))) 4626 goto backout; 4627 4628 page_dup_rmap(page, true); 4629 new_pte = make_huge_pte(vma, page, ((vma->vm_flags & VM_WRITE) 4630 && (vma->vm_flags & VM_SHARED))); 4631 set_huge_pte_at(mm, haddr, ptep, new_pte); 4632 4633 hugetlb_count_add(pages_per_huge_page(h), mm); 4634 4635 if (charge_hpage) 4636 mem_cgroup_commit_charge(page, memcg, false, true); 4637 4638 spin_unlock(ptl); 4639 4640 if (new_page) 4641 SetPagePrivate(&page[1]); 4642 4643 unlock_page(page); 4644 out: 4645 return ret; 4646 4647 backout: 4648 spin_unlock(ptl); 4649 unlock_page(page); 4650 if (charge_hpage) 4651 mem_cgroup_cancel_charge(page, memcg, true); 4652 put_page(page); 4653 goto out; 4654 } 4655 EXPORT_SYMBOL(sharepool_no_page); 4656

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