127 static void anon_vma_chain_link(struct vm_area_struct *vma,  in anon_vma_chain_link()  argument
131 	avc->vma = vma;  in anon_vma_chain_link()
133 	list_add(&avc->same_vma, &vma->anon_vma_chain);  in anon_vma_chain_link()
164 int anon_vma_prepare(struct vm_area_struct *vma)  in anon_vma_prepare()  argument
166 	struct anon_vma *anon_vma = vma->anon_vma;  in anon_vma_prepare()
171 		struct mm_struct *mm = vma->vm_mm;  in anon_vma_prepare()
178 		anon_vma = find_mergeable_anon_vma(vma);  in anon_vma_prepare()
190 		if (likely(!vma->anon_vma)) {  in anon_vma_prepare()
191 			vma->anon_vma = anon_vma;  in anon_vma_prepare()
192 			anon_vma_chain_link(vma, avc, anon_vma);  in anon_vma_prepare()
306 int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)  in anon_vma_fork()  argument
317 	vma->anon_vma = NULL;  in anon_vma_fork()
323 	error = anon_vma_clone(vma, pvma);  in anon_vma_fork()
328 	if (vma->anon_vma)  in anon_vma_fork()
352 	vma->anon_vma = anon_vma;  in anon_vma_fork()
354 	anon_vma_chain_link(vma, avc, anon_vma);  in anon_vma_fork()
363 	unlink_anon_vmas(vma);  in anon_vma_fork()
367 void unlink_anon_vmas(struct vm_area_struct *vma)  in unlink_anon_vmas()  argument
376 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
394 	if (vma->anon_vma)  in unlink_anon_vmas()
395 		vma->anon_vma->degree--;  in unlink_anon_vmas()
403 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
567 __vma_address(struct page *page, struct vm_area_struct *vma)  in __vma_address()  argument
570 	return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);  in __vma_address()
574 vma_address(struct page *page, struct vm_area_struct *vma)  in vma_address()  argument
576 	unsigned long address = __vma_address(page, vma);  in vma_address()
579 	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);  in vma_address()
588 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)  in page_address_in_vma()  argument
597 		if (!vma->anon_vma || !page__anon_vma ||  in page_address_in_vma()
598 		    vma->anon_vma->root != page__anon_vma->root)  in page_address_in_vma()
601 		if (!vma->vm_file || vma->vm_file->f_mapping != page->mapping)  in page_address_in_vma()
605 	address = __vma_address(page, vma);  in page_address_in_vma()
606 	if (unlikely(address < vma->vm_start || address >= vma->vm_end))  in page_address_in_vma()
697 int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma)  in page_mapped_in_vma()  argument
703 	address = __vma_address(page, vma);  in page_mapped_in_vma()
704 	if (unlikely(address < vma->vm_start || address >= vma->vm_end))  in page_mapped_in_vma()
706 	pte = page_check_address(page, vma->vm_mm, address, &ptl, 1);  in page_mapped_in_vma()
723 static int page_referenced_one(struct page *page, struct vm_area_struct *vma,  in page_referenced_one()  argument
726 	struct mm_struct *mm = vma->vm_mm;  in page_referenced_one()
743 		if (vma->vm_flags & VM_LOCKED) {  in page_referenced_one()
750 		if (pmdp_clear_flush_young_notify(vma, address, pmd))  in page_referenced_one()
764 		if (vma->vm_flags & VM_LOCKED) {  in page_referenced_one()
770 		if (ptep_clear_flush_young_notify(vma, address, pte)) {  in page_referenced_one()
778 			if (likely(!(vma->vm_flags & VM_SEQ_READ)))  in page_referenced_one()
786 		pra->vm_flags |= vma->vm_flags;  in page_referenced_one()
796 static bool invalid_page_referenced_vma(struct vm_area_struct *vma, void *arg)  in invalid_page_referenced_vma()  argument
801 	if (!mm_match_cgroup(vma->vm_mm, memcg))  in invalid_page_referenced_vma()
865 static int page_mkclean_one(struct page *page, struct vm_area_struct *vma,  in page_mkclean_one()  argument
868 	struct mm_struct *mm = vma->vm_mm;  in page_mkclean_one()
881 		flush_cache_page(vma, address, pte_pfn(*pte));  in page_mkclean_one()
882 		entry = ptep_clear_flush(vma, address, pte);  in page_mkclean_one()
899 static bool invalid_mkclean_vma(struct vm_area_struct *vma, void *arg)  in invalid_mkclean_vma()  argument
901 	if (vma->vm_flags & VM_SHARED)  in invalid_mkclean_vma()
944 	struct vm_area_struct *vma, unsigned long address)  in page_move_anon_rmap()  argument
946 	struct anon_vma *anon_vma = vma->anon_vma;  in page_move_anon_rmap()
949 	VM_BUG_ON_VMA(!anon_vma, vma);  in page_move_anon_rmap()
950 	VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);  in page_move_anon_rmap()
964 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in __page_set_anon_rmap()  argument
966 	struct anon_vma *anon_vma = vma->anon_vma;  in __page_set_anon_rmap()
983 	page->index = linear_page_index(vma, address);  in __page_set_anon_rmap()
993 	struct vm_area_struct *vma, unsigned long address)  in __page_check_anon_rmap()  argument
1008 	BUG_ON(page_anon_vma(page)->root != vma->anon_vma->root);  in __page_check_anon_rmap()
1009 	BUG_ON(page->index != linear_page_index(vma, address));  in __page_check_anon_rmap()
1025 	struct vm_area_struct *vma, unsigned long address)  in page_add_anon_rmap()  argument
1027 	do_page_add_anon_rmap(page, vma, address, 0);  in page_add_anon_rmap()
1036 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in do_page_add_anon_rmap()  argument
1058 		__page_set_anon_rmap(page, vma, address, exclusive);  in do_page_add_anon_rmap()
1060 		__page_check_anon_rmap(page, vma, address);  in do_page_add_anon_rmap()
1074 	struct vm_area_struct *vma, unsigned long address)  in page_add_new_anon_rmap()  argument
1076 	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);  in page_add_new_anon_rmap()
1083 	__page_set_anon_rmap(page, vma, address, 1);  in page_add_new_anon_rmap()
1181 static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,  in try_to_unmap_one()  argument
1184 	struct mm_struct *mm = vma->vm_mm;  in try_to_unmap_one()
1201 		if (vma->vm_flags & VM_LOCKED)  in try_to_unmap_one()
1208 		if (ptep_clear_flush_young_notify(vma, address, pte)) {  in try_to_unmap_one()
1215 	flush_cache_page(vma, address, page_to_pfn(page));  in try_to_unmap_one()
1216 	pteval = ptep_clear_flush(vma, address, pte);  in try_to_unmap_one()
1310 	if (down_read_trylock(&vma->vm_mm->mmap_sem)) {  in try_to_unmap_one()
1311 		if (vma->vm_flags & VM_LOCKED) {  in try_to_unmap_one()
1315 		up_read(&vma->vm_mm->mmap_sem);  in try_to_unmap_one()
1320 bool is_vma_temporary_stack(struct vm_area_struct *vma)  in is_vma_temporary_stack()  argument
1322 	int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);  in is_vma_temporary_stack()
1327 	if ((vma->vm_flags & VM_STACK_INCOMPLETE_SETUP) ==  in is_vma_temporary_stack()
1334 static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)  in invalid_migration_vma()  argument
1336 	return is_vma_temporary_stack(vma);  in invalid_migration_vma()
1478 		struct vm_area_struct *vma = avc->vma;  in rmap_walk_anon()  local
1479 		unsigned long address = vma_address(page, vma);  in rmap_walk_anon()
1481 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_anon()
1484 		ret = rwc->rmap_one(page, vma, address, rwc->arg);  in rmap_walk_anon()
1511 	struct vm_area_struct *vma;  in rmap_walk_file()  local
1527 	vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {  in rmap_walk_file()
1528 		unsigned long address = vma_address(page, vma);  in rmap_walk_file()
1530 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_file()
1533 		ret = rwc->rmap_one(page, vma, address, rwc->arg);  in rmap_walk_file()
1562 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in __hugepage_set_anon_rmap()  argument
1564 	struct anon_vma *anon_vma = vma->anon_vma;  in __hugepage_set_anon_rmap()
1575 	page->index = linear_page_index(vma, address);  in __hugepage_set_anon_rmap()
1579 			    struct vm_area_struct *vma, unsigned long address)  in hugepage_add_anon_rmap()  argument
1581 	struct anon_vma *anon_vma = vma->anon_vma;  in hugepage_add_anon_rmap()
1589 		__hugepage_set_anon_rmap(page, vma, address, 0);  in hugepage_add_anon_rmap()
1593 			struct vm_area_struct *vma, unsigned long address)  in hugepage_add_new_anon_rmap()  argument
1595 	BUG_ON(address < vma->vm_start || address >= vma->vm_end);  in hugepage_add_new_anon_rmap()
1597 	__hugepage_set_anon_rmap(page, vma, address, 1);  in hugepage_add_new_anon_rmap()