132 static void anon_vma_chain_link(struct vm_area_struct *vma,  in anon_vma_chain_link()  argument
136 	avc->vma = vma;  in anon_vma_chain_link()
138 	list_add(&avc->same_vma, &vma->anon_vma_chain);  in anon_vma_chain_link()
169 int anon_vma_prepare(struct vm_area_struct *vma)  in anon_vma_prepare()  argument
171 	struct anon_vma *anon_vma = vma->anon_vma;  in anon_vma_prepare()
176 		struct mm_struct *mm = vma->vm_mm;  in anon_vma_prepare()
183 		anon_vma = find_mergeable_anon_vma(vma);  in anon_vma_prepare()
195 		if (likely(!vma->anon_vma)) {  in anon_vma_prepare()
196 			vma->anon_vma = anon_vma;  in anon_vma_prepare()
197 			anon_vma_chain_link(vma, avc, anon_vma);  in anon_vma_prepare()
311 int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)  in anon_vma_fork()  argument
322 	vma->anon_vma = NULL;  in anon_vma_fork()
328 	error = anon_vma_clone(vma, pvma);  in anon_vma_fork()
333 	if (vma->anon_vma)  in anon_vma_fork()
357 	vma->anon_vma = anon_vma;  in anon_vma_fork()
359 	anon_vma_chain_link(vma, avc, anon_vma);  in anon_vma_fork()
368 	unlink_anon_vmas(vma);  in anon_vma_fork()
372 void unlink_anon_vmas(struct vm_area_struct *vma)  in unlink_anon_vmas()  argument
381 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
399 	if (vma->anon_vma)  in unlink_anon_vmas()
400 		vma->anon_vma->degree--;  in unlink_anon_vmas()
408 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {  in unlink_anon_vmas()
572 __vma_address(struct page *page, struct vm_area_struct *vma)  in __vma_address()  argument
575 	return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);  in __vma_address()
579 vma_address(struct page *page, struct vm_area_struct *vma)  in vma_address()  argument
581 	unsigned long address = __vma_address(page, vma);  in vma_address()
584 	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);  in vma_address()
694 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)  in page_address_in_vma()  argument
703 		if (!vma->anon_vma || !page__anon_vma ||  in page_address_in_vma()
704 		    vma->anon_vma->root != page__anon_vma->root)  in page_address_in_vma()
707 		if (!vma->vm_file || vma->vm_file->f_mapping != page->mapping)  in page_address_in_vma()
711 	address = __vma_address(page, vma);  in page_address_in_vma()
712 	if (unlikely(address < vma->vm_start || address >= vma->vm_end))  in page_address_in_vma()
803 int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma)  in page_mapped_in_vma()  argument
809 	address = __vma_address(page, vma);  in page_mapped_in_vma()
810 	if (unlikely(address < vma->vm_start || address >= vma->vm_end))  in page_mapped_in_vma()
812 	pte = page_check_address(page, vma->vm_mm, address, &ptl, 1);  in page_mapped_in_vma()
829 static int page_referenced_one(struct page *page, struct vm_area_struct *vma,  in page_referenced_one()  argument
832 	struct mm_struct *mm = vma->vm_mm;  in page_referenced_one()
849 		if (vma->vm_flags & VM_LOCKED) {  in page_referenced_one()
856 		if (pmdp_clear_flush_young_notify(vma, address, pmd))  in page_referenced_one()
870 		if (vma->vm_flags & VM_LOCKED) {  in page_referenced_one()
876 		if (ptep_clear_flush_young_notify(vma, address, pte)) {  in page_referenced_one()
884 			if (likely(!(vma->vm_flags & VM_SEQ_READ)))  in page_referenced_one()
897 		pra->vm_flags |= vma->vm_flags;  in page_referenced_one()
907 static bool invalid_page_referenced_vma(struct vm_area_struct *vma, void *arg)  in invalid_page_referenced_vma()  argument
912 	if (!mm_match_cgroup(vma->vm_mm, memcg))  in invalid_page_referenced_vma()
976 static int page_mkclean_one(struct page *page, struct vm_area_struct *vma,  in page_mkclean_one()  argument
979 	struct mm_struct *mm = vma->vm_mm;  in page_mkclean_one()
992 		flush_cache_page(vma, address, pte_pfn(*pte));  in page_mkclean_one()
993 		entry = ptep_clear_flush(vma, address, pte);  in page_mkclean_one()
1010 static bool invalid_mkclean_vma(struct vm_area_struct *vma, void *arg)  in invalid_mkclean_vma()  argument
1012 	if (vma->vm_flags & VM_SHARED)  in invalid_mkclean_vma()
1055 	struct vm_area_struct *vma, unsigned long address)  in page_move_anon_rmap()  argument
1057 	struct anon_vma *anon_vma = vma->anon_vma;  in page_move_anon_rmap()
1060 	VM_BUG_ON_VMA(!anon_vma, vma);  in page_move_anon_rmap()
1061 	VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);  in page_move_anon_rmap()
1080 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in __page_set_anon_rmap()  argument
1082 	struct anon_vma *anon_vma = vma->anon_vma;  in __page_set_anon_rmap()
1099 	page->index = linear_page_index(vma, address);  in __page_set_anon_rmap()
1109 	struct vm_area_struct *vma, unsigned long address)  in __page_check_anon_rmap()  argument
1124 	BUG_ON(page_anon_vma(page)->root != vma->anon_vma->root);  in __page_check_anon_rmap()
1125 	BUG_ON(page->index != linear_page_index(vma, address));  in __page_check_anon_rmap()
1141 	struct vm_area_struct *vma, unsigned long address)  in page_add_anon_rmap()  argument
1143 	do_page_add_anon_rmap(page, vma, address, 0);  in page_add_anon_rmap()
1152 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in do_page_add_anon_rmap()  argument
1174 		__page_set_anon_rmap(page, vma, address, exclusive);  in do_page_add_anon_rmap()
1176 		__page_check_anon_rmap(page, vma, address);  in do_page_add_anon_rmap()
1190 	struct vm_area_struct *vma, unsigned long address)  in page_add_new_anon_rmap()  argument
1192 	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);  in page_add_new_anon_rmap()
1199 	__page_set_anon_rmap(page, vma, address, 1);  in page_add_new_anon_rmap()
1297 static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,  in try_to_unmap_one()  argument
1300 	struct mm_struct *mm = vma->vm_mm;  in try_to_unmap_one()
1308 	if ((flags & TTU_MUNLOCK) && !(vma->vm_flags & VM_LOCKED))  in try_to_unmap_one()
1321 		if (vma->vm_flags & VM_LOCKED) {  in try_to_unmap_one()
1331 		if (ptep_clear_flush_young_notify(vma, address, pte)) {  in try_to_unmap_one()
1338 	flush_cache_page(vma, address, page_to_pfn(page));  in try_to_unmap_one()
1351 		pteval = ptep_clear_flush(vma, address, pte);  in try_to_unmap_one()
1434 bool is_vma_temporary_stack(struct vm_area_struct *vma)  in is_vma_temporary_stack()  argument
1436 	int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);  in is_vma_temporary_stack()
1441 	if ((vma->vm_flags & VM_STACK_INCOMPLETE_SETUP) ==  in is_vma_temporary_stack()
1448 static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)  in invalid_migration_vma()  argument
1450 	return is_vma_temporary_stack(vma);  in invalid_migration_vma()
1592 		struct vm_area_struct *vma = avc->vma;  in rmap_walk_anon()  local
1593 		unsigned long address = vma_address(page, vma);  in rmap_walk_anon()
1597 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_anon()
1600 		ret = rwc->rmap_one(page, vma, address, rwc->arg);  in rmap_walk_anon()
1627 	struct vm_area_struct *vma;  in rmap_walk_file()  local
1643 	vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {  in rmap_walk_file()
1644 		unsigned long address = vma_address(page, vma);  in rmap_walk_file()
1648 		if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))  in rmap_walk_file()
1651 		ret = rwc->rmap_one(page, vma, address, rwc->arg);  in rmap_walk_file()
1680 	struct vm_area_struct *vma, unsigned long address, int exclusive)  in __hugepage_set_anon_rmap()  argument
1682 	struct anon_vma *anon_vma = vma->anon_vma;  in __hugepage_set_anon_rmap()
1693 	page->index = linear_page_index(vma, address);  in __hugepage_set_anon_rmap()
1697 			    struct vm_area_struct *vma, unsigned long address)  in hugepage_add_anon_rmap()  argument
1699 	struct anon_vma *anon_vma = vma->anon_vma;  in hugepage_add_anon_rmap()
1707 		__hugepage_set_anon_rmap(page, vma, address, 0);  in hugepage_add_anon_rmap()
1711 			struct vm_area_struct *vma, unsigned long address)  in hugepage_add_new_anon_rmap()  argument
1713 	BUG_ON(address < vma->vm_start || address >= vma->vm_end);  in hugepage_add_new_anon_rmap()
1715 	__hugepage_set_anon_rmap(page, vma, address, 1);  in hugepage_add_new_anon_rmap()