void hugetlb_add_new_anon_rmap(struct folio *, struct vm_area_struct *,
unsigned long address);
+static inline void hugetlb_remove_rmap(struct folio *folio)
+{
+ VM_WARN_ON_FOLIO(!folio_test_hugetlb(folio), folio);
+
+ atomic_dec(&folio->_entire_mapcount);
+}
+
static inline void __page_dup_rmap(struct page *page, bool compound)
{
if (compound) {
make_pte_marker(PTE_MARKER_UFFD_WP),
sz);
hugetlb_count_sub(pages_per_huge_page(h), mm);
- page_remove_rmap(page, vma, true);
+ hugetlb_remove_rmap(page_folio(page));
spin_unlock(ptl);
tlb_remove_page_size(tlb, page, huge_page_size(h));
/* Break COW or unshare */
huge_ptep_clear_flush(vma, haddr, ptep);
- page_remove_rmap(&old_folio->page, vma, true);
+ hugetlb_remove_rmap(old_folio);
hugetlb_add_new_anon_rmap(new_folio, vma, haddr);
if (huge_pte_uffd_wp(pte))
newpte = huge_pte_mkuffd_wp(newpte);
bool last;
enum node_stat_item idx;
+ VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio);
VM_BUG_ON_PAGE(compound && !PageHead(page), page);
- /* Hugetlb pages are not counted in NR_*MAPPED */
- if (unlikely(folio_test_hugetlb(folio))) {
- /* hugetlb pages are always mapped with pmds */
- atomic_dec(&folio->_entire_mapcount);
- return;
- }
-
/* Is page being unmapped by PTE? Is this its last map to be removed? */
if (likely(!compound)) {
last = atomic_add_negative(-1, &page->_mapcount);
dec_mm_counter(mm, mm_counter_file(&folio->page));
}
discard:
- page_remove_rmap(subpage, vma, folio_test_hugetlb(folio));
+ if (unlikely(folio_test_hugetlb(folio)))
+ hugetlb_remove_rmap(folio);
+ else
+ page_remove_rmap(subpage, vma, false);
if (vma->vm_flags & VM_LOCKED)
mlock_drain_local();
folio_put(folio);
*/
}
- page_remove_rmap(subpage, vma, folio_test_hugetlb(folio));
+ if (unlikely(folio_test_hugetlb(folio)))
+ hugetlb_remove_rmap(folio);
+ else
+ page_remove_rmap(subpage, vma, false);
if (vma->vm_flags & VM_LOCKED)
mlock_drain_local();
folio_put(folio);