149 static void anon_vma_chain_link(struct vm_area_struct *vma,  in anon_vma_chain_link()  argument
153 	avc->vma = vma;  in anon_vma_chain_link()
155 	list_add(&avc->same_vma, &vma->anon_vma_chain);  in anon_vma_chain_link()
187 int __anon_vma_prepare(struct vm_area_struct *vma)  in __anon_vma_prepare()  argument
189 	struct mm_struct *mm = vma->vm_mm;  in __anon_vma_prepare()
199 	anon_vma = find_mergeable_anon_vma(vma);  in __anon_vma_prepare()
212 	if (likely(!vma->anon_vma)) {  in __anon_vma_prepare()
213 		vma->anon_vma = anon_vma;  in __anon_vma_prepare()
214 		anon_vma_chain_link(vma, avc, anon_vma);  in __anon_vma_prepare()
333 int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)  in anon_vma_fork()  argument
344 	vma->anon_vma = NULL;  in anon_vma_fork()
350 	error = anon_vma_clone(vma, pvma);  in anon_vma_fork()
355 	if (vma->anon_vma)  in anon_vma_fork()
380 	vma->anon_vma = anon_vma;  in anon_vma_fork()
382 	anon_vma_chain_link(vma, avc, anon_vma);  in anon_vma_fork()
391 	unlink_anon_vmas(vma);  in anon_vma_fork()
395 void unlink_anon_vmas(struct vm_area_struct *vma)  in unlink_anon_vmas()  argument
404 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
422 	if (vma->anon_vma) {  in unlink_anon_vmas()
423 		vma->anon_vma->num_active_vmas--;  in unlink_anon_vmas()
429 		vma->anon_vma = NULL;  in unlink_anon_vmas()
438 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
747 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)  in page_address_in_vma()  argument
756 		if (!vma->anon_vma || !page__anon_vma ||  in page_address_in_vma()
757 		    vma->anon_vma->root != page__anon_vma->root)  in page_address_in_vma()
759 	} else if (!vma->vm_file) {  in page_address_in_vma()
761 	} else if (vma->vm_file->f_mapping != folio->mapping) {  in page_address_in_vma()
765 	return vma_address(page, vma);  in page_address_in_vma()
807 		struct vm_area_struct *vma, unsigned long address, void *arg)  in folio_referenced_one()  argument
810 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, 0);  in folio_referenced_one()
816 		if ((vma->vm_flags & VM_LOCKED) &&  in folio_referenced_one()
819 			mlock_vma_folio(folio, vma, !pvmw.pte);  in folio_referenced_one()
827 			    !(vma->vm_flags & (VM_SEQ_READ | VM_RAND_READ))) {  in folio_referenced_one()
832 			if (ptep_clear_flush_young_notify(vma, address,  in folio_referenced_one()
842 				if (likely(!(vma->vm_flags & VM_SEQ_READ)))  in folio_referenced_one()
846 			if (pmdp_clear_flush_young_notify(vma, address,  in folio_referenced_one()
864 		pra->vm_flags |= vma->vm_flags & ~VM_LOCKED;  in folio_referenced_one()
873 static bool invalid_folio_referenced_vma(struct vm_area_struct *vma, void *arg)  in invalid_folio_referenced_vma()  argument
878 	if (!mm_match_cgroup(vma->vm_mm, memcg))  in invalid_folio_referenced_vma()
945 	struct vm_area_struct *vma = pvmw->vma;  in page_vma_mkclean_one()  local
954 				0, vma, vma->vm_mm, address,  in page_vma_mkclean_one()
969 			flush_cache_page(vma, address, pte_pfn(*pte));  in page_vma_mkclean_one()
970 			entry = ptep_clear_flush(vma, address, pte);  in page_vma_mkclean_one()
973 			set_pte_at(vma->vm_mm, address, pte, entry);  in page_vma_mkclean_one()
983 			flush_cache_range(vma, address,  in page_vma_mkclean_one()
985 			entry = pmdp_invalidate(vma, address, pmd);  in page_vma_mkclean_one()
988 			set_pmd_at(vma->vm_mm, address, pmd, entry);  in page_vma_mkclean_one()
1012 static bool page_mkclean_one(struct folio *folio, struct vm_area_struct *vma,  in page_mkclean_one()  argument
1015 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, PVMW_SYNC);  in page_mkclean_one()
1023 static bool invalid_mkclean_vma(struct vm_area_struct *vma, void *arg)  in invalid_mkclean_vma()  argument
1025 	if (vma->vm_flags & VM_SHARED)  in invalid_mkclean_vma()
1069 		      struct vm_area_struct *vma)  in pfn_mkclean_range()  argument
1075 		.vma		= vma,  in pfn_mkclean_range()
1079 	if (invalid_mkclean_vma(vma, NULL))  in pfn_mkclean_range()
1082 	pvmw.address = vma_pgoff_address(pgoff, nr_pages, vma);  in pfn_mkclean_range()
1083 	VM_BUG_ON_VMA(pvmw.address == -EFAULT, vma);  in pfn_mkclean_range()
1098 void page_move_anon_rmap(struct page *page, struct vm_area_struct *vma)  in page_move_anon_rmap()  argument
1100 	void *anon_vma = vma->anon_vma;  in page_move_anon_rmap()
1104 	VM_BUG_ON_VMA(!anon_vma, vma);  in page_move_anon_rmap()
1124 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in __page_set_anon_rmap()  argument
1126 	struct anon_vma *anon_vma = vma->anon_vma;  in __page_set_anon_rmap()
1149 	page->index = linear_page_index(vma, address);  in __page_set_anon_rmap()
1162 	struct vm_area_struct *vma, unsigned long address)  in __page_check_anon_rmap()  argument
1176 	VM_BUG_ON_FOLIO(folio_anon_vma(folio)->root != vma->anon_vma->root,  in __page_check_anon_rmap()
1178 	VM_BUG_ON_PAGE(page_to_pgoff(page) != linear_page_index(vma, address),  in __page_check_anon_rmap()
1195 	struct vm_area_struct *vma, unsigned long address, rmap_t flags)  in page_add_anon_rmap()  argument
1235 		__page_set_anon_rmap(page, vma, address,  in page_add_anon_rmap()
1238 		__page_check_anon_rmap(page, vma, address);  in page_add_anon_rmap()
1240 	mlock_vma_page(page, vma, compound);  in page_add_anon_rmap()
1257 	struct vm_area_struct *vma, unsigned long address)  in page_add_new_anon_rmap()  argument
1262 	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);  in page_add_new_anon_rmap()
1276 	__page_set_anon_rmap(page, vma, address, 1);  in page_add_new_anon_rmap()
1288 	struct vm_area_struct *vma, bool compound)  in page_add_file_rmap()  argument
1333 	mlock_vma_page(page, vma, compound);  in page_add_file_rmap()
1424 	struct vm_area_struct *vma, bool compound)  in page_remove_rmap()  argument
1464 	munlock_vma_page(page, vma, compound);  in page_remove_rmap()
1470 static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,  in try_to_unmap_one()  argument
1473 	struct mm_struct *mm = vma->vm_mm;  in try_to_unmap_one()
1474 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, 0);  in try_to_unmap_one()
1491 		split_huge_pmd_address(vma, address, false, folio);  in try_to_unmap_one()
1502 	mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma, vma->vm_mm,  in try_to_unmap_one()
1509 		adjust_range_if_pmd_sharing_possible(vma, &range.start,  in try_to_unmap_one()
1522 		    (vma->vm_flags & VM_LOCKED)) {  in try_to_unmap_one()
1524 			mlock_vma_folio(folio, vma, false);  in try_to_unmap_one()
1551 			flush_cache_range(vma, range.start, range.end);  in try_to_unmap_one()
1565 				if (!hugetlb_vma_trylock_write(vma)) {  in try_to_unmap_one()
1570 				if (huge_pmd_unshare(mm, vma, address, pvmw.pte)) {  in try_to_unmap_one()
1571 					hugetlb_vma_unlock_write(vma);  in try_to_unmap_one()
1572 					flush_tlb_range(vma,  in try_to_unmap_one()
1589 				hugetlb_vma_unlock_write(vma);  in try_to_unmap_one()
1591 			pteval = huge_ptep_clear_flush(vma, address, pvmw.pte);  in try_to_unmap_one()
1593 			flush_cache_page(vma, address, pte_pfn(*pvmw.pte));  in try_to_unmap_one()
1608 				pteval = ptep_clear_flush(vma, address, pvmw.pte);  in try_to_unmap_one()
1617 		pte_install_uffd_wp_if_needed(vma, address, pvmw.pte, pteval);  in try_to_unmap_one()
1636 		} else if (pte_unused(pteval) && !userfaultfd_armed(vma)) {  in try_to_unmap_one()
1719 			if (arch_unmap_one(mm, vma, address, pteval) < 0) {  in try_to_unmap_one()
1788 		page_remove_rmap(subpage, vma, folio_test_hugetlb(folio));  in try_to_unmap_one()
1789 		if (vma->vm_flags & VM_LOCKED)  in try_to_unmap_one()
1799 static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)  in invalid_migration_vma()  argument
1801 	return vma_is_temporary_stack(vma);  in invalid_migration_vma()
1841 static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma,  in try_to_migrate_one()  argument
1844 	struct mm_struct *mm = vma->vm_mm;  in try_to_migrate_one()
1845 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, 0);  in try_to_migrate_one()
1866 		split_huge_pmd_address(vma, address, true, folio);  in try_to_migrate_one()
1877 	mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma, vma->vm_mm,  in try_to_migrate_one()
1884 		adjust_range_if_pmd_sharing_possible(vma, &range.start,  in try_to_migrate_one()
1941 			flush_cache_range(vma, range.start, range.end);  in try_to_migrate_one()
1955 				if (!hugetlb_vma_trylock_write(vma)) {  in try_to_migrate_one()
1960 				if (huge_pmd_unshare(mm, vma, address, pvmw.pte)) {  in try_to_migrate_one()
1961 					hugetlb_vma_unlock_write(vma);  in try_to_migrate_one()
1962 					flush_tlb_range(vma,  in try_to_migrate_one()
1980 				hugetlb_vma_unlock_write(vma);  in try_to_migrate_one()
1983 			pteval = huge_ptep_clear_flush(vma, address, pvmw.pte);  in try_to_migrate_one()
1985 			flush_cache_page(vma, address, pte_pfn(*pvmw.pte));  in try_to_migrate_one()
1987 			pteval = ptep_clear_flush(vma, address, pvmw.pte);  in try_to_migrate_one()
2044 		} else if (pte_unused(pteval) && !userfaultfd_armed(vma)) {  in try_to_migrate_one()
2063 			if (arch_unmap_one(mm, vma, address, pteval) < 0) {  in try_to_migrate_one()
2129 		page_remove_rmap(subpage, vma, folio_test_hugetlb(folio));  in try_to_migrate_one()
2130 		if (vma->vm_flags & VM_LOCKED)  in try_to_migrate_one()
2195 		struct vm_area_struct *vma, unsigned long address, void *priv)  in page_make_device_exclusive_one()  argument
2197 	struct mm_struct *mm = vma->vm_mm;  in page_make_device_exclusive_one()
2198 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, 0);  in page_make_device_exclusive_one()
2207 	mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0, vma,  in page_make_device_exclusive_one()
2208 				      vma->vm_mm, address, min(vma->vm_end,  in page_make_device_exclusive_one()
2228 		flush_cache_page(vma, address, pte_pfn(*pvmw.pte));  in page_make_device_exclusive_one()
2229 		pteval = ptep_clear_flush(vma, address, pvmw.pte);  in page_make_device_exclusive_one()
2266 		page_remove_rmap(subpage, vma, false);  in page_make_device_exclusive_one()
2442 		struct vm_area_struct *vma = avc->vma;  in rmap_walk_anon()  local
2443 		unsigned long address = vma_address(&folio->page, vma);  in rmap_walk_anon()
2445 		VM_BUG_ON_VMA(address == -EFAULT, vma);  in rmap_walk_anon()
2448 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_anon()
2451 		if (!rwc->rmap_one(folio, vma, address, rwc->arg))  in rmap_walk_anon()
2474 	struct vm_area_struct *vma;  in rmap_walk_file()  local
2501 	vma_interval_tree_foreach(vma, &mapping->i_mmap,  in rmap_walk_file()
2503 		unsigned long address = vma_address(&folio->page, vma);  in rmap_walk_file()
2505 		VM_BUG_ON_VMA(address == -EFAULT, vma);  in rmap_walk_file()
2508 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_file()
2511 		if (!rwc->rmap_one(folio, vma, address, rwc->arg))  in rmap_walk_file()
2551 void hugepage_add_anon_rmap(struct page *page, struct vm_area_struct *vma,  in hugepage_add_anon_rmap()  argument
2554 	struct anon_vma *anon_vma = vma->anon_vma;  in hugepage_add_anon_rmap()
2564 		__page_set_anon_rmap(page, vma, address,  in hugepage_add_anon_rmap()
2569 			struct vm_area_struct *vma, unsigned long address)  in hugepage_add_new_anon_rmap()  argument
2571 	BUG_ON(address < vma->vm_start || address >= vma->vm_end);  in hugepage_add_new_anon_rmap()
2575 	__page_set_anon_rmap(page, vma, address, 1);  in hugepage_add_new_anon_rmap()