998 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1000 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1005 				*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1010 		if (bdev == sis->bdev) {  in swap_type_of()
1011 			struct swap_extent *se = &sis->first_swap_extent;  in swap_type_of()
1015 					*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1057 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1059 		spin_lock(&sis->lock);  in count_swap_pages()
1060 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1061 			n = sis->pages;  in count_swap_pages()
1063 				n -= sis->inuse_pages;  in count_swap_pages()
1065 		spin_unlock(&sis->lock);  in count_swap_pages()
1581 	struct swap_info_struct *sis;  in map_swap_entry()  local
1586 	sis = swap_info[swp_type(entry)];  in map_swap_entry()
1587 	*bdev = sis->bdev;  in map_swap_entry()
1590 	start_se = sis->curr_swap_extent;  in map_swap_entry()
1602 		sis->curr_swap_extent = se;  in map_swap_entry()
1620 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
1622 	while (!list_empty(&sis->first_swap_extent.list)) {  in destroy_swap_extents()
1625 		se = list_entry(sis->first_swap_extent.list.next,  in destroy_swap_extents()
1631 	if (sis->flags & SWP_FILE) {  in destroy_swap_extents()
1632 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
1635 		sis->flags &= ~SWP_FILE;  in destroy_swap_extents()
1647 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
1655 		se = &sis->first_swap_extent;  in add_swap_extent()
1656 		sis->curr_swap_extent = se;  in add_swap_extent()
1662 		lh = sis->first_swap_extent.list.prev;	/* Highest extent */  in add_swap_extent()
1682 	list_add_tail(&new_se->list, &sis->first_swap_extent.list);  in add_swap_extent()
1717 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
1719 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
1725 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
1726 		*span = sis->pages;  in setup_swap_extents()
1731 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
1733 			sis->flags |= SWP_FILE;  in setup_swap_extents()
1734 			ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
1735 			*span = sis->pages;  in setup_swap_extents()
1740 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()