1040 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1042 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1047 				*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1052 		if (bdev == sis->bdev) {  in swap_type_of()
1053 			struct swap_extent *se = &sis->first_swap_extent;  in swap_type_of()
1057 					*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1099 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1101 		spin_lock(&sis->lock);  in count_swap_pages()
1102 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1103 			n = sis->pages;  in count_swap_pages()
1105 				n -= sis->inuse_pages;  in count_swap_pages()
1107 		spin_unlock(&sis->lock);  in count_swap_pages()
1623 	struct swap_info_struct *sis;  in map_swap_entry()  local
1628 	sis = swap_info[swp_type(entry)];  in map_swap_entry()
1629 	*bdev = sis->bdev;  in map_swap_entry()
1632 	start_se = sis->curr_swap_extent;  in map_swap_entry()
1644 		sis->curr_swap_extent = se;  in map_swap_entry()
1662 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
1664 	while (!list_empty(&sis->first_swap_extent.list)) {  in destroy_swap_extents()
1667 		se = list_entry(sis->first_swap_extent.list.next,  in destroy_swap_extents()
1673 	if (sis->flags & SWP_FILE) {  in destroy_swap_extents()
1674 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
1677 		sis->flags &= ~SWP_FILE;  in destroy_swap_extents()
1689 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
1697 		se = &sis->first_swap_extent;  in add_swap_extent()
1698 		sis->curr_swap_extent = se;  in add_swap_extent()
1704 		lh = sis->first_swap_extent.list.prev;	/* Highest extent */  in add_swap_extent()
1724 	list_add_tail(&new_se->list, &sis->first_swap_extent.list);  in add_swap_extent()
1759 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
1761 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
1767 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
1768 		*span = sis->pages;  in setup_swap_extents()
1773 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
1775 			sis->flags |= SWP_FILE;  in setup_swap_extents()
1776 			ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
1777 			*span = sis->pages;  in setup_swap_extents()
1782 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()