1252 static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff)  in retract_page_tables()  argument
1258 	i_mmap_lock_write(mapping);  in retract_page_tables()
1259 	vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {  in retract_page_tables()
1287 	i_mmap_unlock_write(mapping);  in retract_page_tables()
1309 		struct address_space *mapping, pgoff_t start,  in collapse_shmem()  argument
1342 	new_page->mapping = mapping;  in collapse_shmem()
1351 	spin_lock_irq(&mapping->tree_lock);  in collapse_shmem()
1352 	radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) {  in collapse_shmem()
1369 		if (n && !shmem_charge(mapping->host, n)) {  in collapse_shmem()
1374 			radix_tree_insert(&mapping->page_tree, index,  in collapse_shmem()
1384 				&mapping->tree_lock);  in collapse_shmem()
1386 			spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1388 			if (shmem_getpage(mapping->host, index, &page,  in collapse_shmem()
1395 			spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1417 		if (page_mapping(page) != mapping) {  in collapse_shmem()
1428 			unmap_mapping_range(mapping, index << PAGE_SHIFT,  in collapse_shmem()
1431 		spin_lock_irq(&mapping->tree_lock);  in collapse_shmem()
1433 		slot = radix_tree_lookup_slot(&mapping->page_tree, index);  in collapse_shmem()
1435 					&mapping->tree_lock), page);  in collapse_shmem()
1446 			spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1458 		radix_tree_replace_slot(&mapping->page_tree, slot,  in collapse_shmem()
1483 		if (!shmem_charge(mapping->host, n)) {  in collapse_shmem()
1488 			radix_tree_insert(&mapping->page_tree, index,  in collapse_shmem()
1503 	spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1520 			page->mapping = NULL;  in collapse_shmem()
1542 		retract_page_tables(mapping, start);  in collapse_shmem()
1546 		spin_lock_irq(&mapping->tree_lock);  in collapse_shmem()
1547 		mapping->nrpages -= nr_none;  in collapse_shmem()
1548 		shmem_uncharge(mapping->host, nr_none);  in collapse_shmem()
1550 		radix_tree_for_each_slot(slot, &mapping->page_tree, &iter,  in collapse_shmem()
1561 				radix_tree_delete(&mapping->page_tree,  in collapse_shmem()
1571 			radix_tree_replace_slot(&mapping->page_tree,  in collapse_shmem()
1574 			spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1577 			spin_lock_irq(&mapping->tree_lock);  in collapse_shmem()
1580 		spin_unlock_irq(&mapping->tree_lock);  in collapse_shmem()
1583 		new_page->mapping = NULL;  in collapse_shmem()
1593 		struct address_space *mapping,  in khugepaged_scan_shmem()  argument
1607 	radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) {  in khugepaged_scan_shmem()
1667 			collapse_shmem(mm, mapping, start, hpage, node);  in khugepaged_scan_shmem()
1675 		struct address_space *mapping,  in khugepaged_scan_shmem()  argument