154 static inline struct swap_extent *first_se(struct swap_info_struct *sis)  in first_se()  argument
156 	struct rb_node *rb = rb_first(&sis->swap_extent_root);  in first_se()
204 offset_to_swap_extent(struct swap_info_struct *sis, unsigned long offset)  in offset_to_swap_extent()  argument
209 	rb = sis->swap_extent_root.rb_node;  in offset_to_swap_extent()
1813 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1815 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1818 		if (device == sis->bdev->bd_dev) {  in swap_type_of()
1819 			struct swap_extent *se = first_se(sis);  in swap_type_of()
1837 		struct swap_info_struct *sis = swap_info[type];  in find_first_swap()  local
1839 		if (!(sis->flags & SWP_WRITEOK))  in find_first_swap()
1841 		*device = sis->bdev->bd_dev;  in find_first_swap()
1875 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1877 		spin_lock(&sis->lock);  in count_swap_pages()
1878 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1879 			n = sis->pages;  in count_swap_pages()
1881 				n -= sis->inuse_pages;  in count_swap_pages()
1883 		spin_unlock(&sis->lock);  in count_swap_pages()
2294 	struct swap_info_struct *sis;  in map_swap_entry()  local
2298 	sis = swp_swap_info(entry);  in map_swap_entry()
2299 	*bdev = sis->bdev;  in map_swap_entry()
2302 	se = offset_to_swap_extent(sis, offset);  in map_swap_entry()
2319 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
2321 	while (!RB_EMPTY_ROOT(&sis->swap_extent_root)) {  in destroy_swap_extents()
2322 		struct rb_node *rb = sis->swap_extent_root.rb_node;  in destroy_swap_extents()
2325 		rb_erase(rb, &sis->swap_extent_root);  in destroy_swap_extents()
2329 	if (sis->flags & SWP_ACTIVATED) {  in destroy_swap_extents()
2330 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
2333 		sis->flags &= ~SWP_ACTIVATED;  in destroy_swap_extents()
2346 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
2349 	struct rb_node **link = &sis->swap_extent_root.rb_node, *parent = NULL;  in add_swap_extent()
2381 	rb_insert_color(&new_se->rb_node, &sis->swap_extent_root);  in add_swap_extent()
2416 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
2418 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
2424 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2425 		*span = sis->pages;  in setup_swap_extents()
2430 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
2432 			sis->flags |= SWP_ACTIVATED;  in setup_swap_extents()
2434 			sis->flags |= SWP_FS_OPS;  in setup_swap_extents()
2435 			ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2436 			*span = sis->pages;  in setup_swap_extents()
2441 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()