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owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/18/25 12:57 PM, nifan.cxl@gmail.com wrote: > From: Fan Ni > > In __unmap_hugepage_range(), the "page" pointer always points to the > first page of a huge page, which guarantees there is a folio associating > with it. Convert the "page" pointer to use folio. > > Signed-off-by: Fan Ni > --- > This is a new patch added to the series based on the discussion here: > https://lore.kernel.org/linux-mm/aAHUluy7T32ZlYg7@debian/T/#m2b9cc1743e1907e52658815b297b9d249474f387 > --- > mm/hugetlb.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/mm/hugetlb.c b/mm/hugetlb.c > index 7d280ab23784..8177a3fe47d7 100644 > --- a/mm/hugetlb.c > +++ b/mm/hugetlb.c > @@ -5840,7 +5840,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > pte_t *ptep; > pte_t pte; > spinlock_t *ptl; > - struct page *page; > + struct folio *folio; > struct hstate *h = hstate_vma(vma); > unsigned long sz = huge_page_size(h); > bool adjust_reservation = false; > @@ -5904,14 +5904,14 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > continue; > } > > - page = pte_page(pte); > + folio = page_folio(pte_page(pte)); > /* > * If a reference page is supplied, it is because a specific > * page is being unmapped, not a range. Ensure the page we > * are about to unmap is the actual page of interest. > */ > if (ref_folio) { > - if (page != folio_page(ref_folio, 0)) { > + if (folio != ref_folio) { > spin_unlock(ptl); > continue; > } > @@ -5926,7 +5926,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > pte = huge_ptep_get_and_clear(mm, address, ptep, sz); > tlb_remove_huge_tlb_entry(h, tlb, ptep, address); > if (huge_pte_dirty(pte)) > - set_page_dirty(page); > + folio_mark_dirty(folio); > /* Leave a uffd-wp pte marker if needed */ > if (huge_pte_uffd_wp(pte) && > !(zap_flags & ZAP_FLAG_DROP_MARKER)) > @@ -5934,7 +5934,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > make_pte_marker(PTE_MARKER_UFFD_WP), > sz); > hugetlb_count_sub(pages_per_huge_page(h), mm); > - hugetlb_remove_rmap(page_folio(page)); > + hugetlb_remove_rmap(folio); > > /* > * Restore the reservation for anonymous page, otherwise the > @@ -5943,8 +5943,8 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > * reservation bit. > */ > if (!h->surplus_huge_pages && __vma_private_lock(vma) && > - folio_test_anon(page_folio(page))) { > - folio_set_hugetlb_restore_reserve(page_folio(page)); > + folio_test_anon(folio)) { > + folio_set_hugetlb_restore_reserve(folio); > /* Reservation to be adjusted after the spin lock */ > adjust_reservation = true; > } > @@ -5968,12 +5968,12 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, > * count will not be incremented by free_huge_folio. > * Act as if we consumed the reservation. > */ > - folio_clear_hugetlb_restore_reserve(page_folio(page)); > + folio_clear_hugetlb_restore_reserve(folio); > else if (rc) > vma_add_reservation(h, vma, address); > } > > - tlb_remove_page_size(tlb, page, huge_page_size(h)); > + tlb_remove_page_size(tlb, folio_page(folio, 0), huge_page_size(h)); > /* > * Bail out after unmapping reference page if supplied > */ Reviewed-by: Sidhartha Kumar