155 static inline struct swap_extent *first_se(struct swap_info_struct *sis)  in first_se()  argument
157 	struct rb_node *rb = rb_first(&sis->swap_extent_root);  in first_se()
205 offset_to_swap_extent(struct swap_info_struct *sis, unsigned long offset)  in offset_to_swap_extent()  argument
210 	rb = sis->swap_extent_root.rb_node;  in offset_to_swap_extent()
1770 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1772 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1777 				*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1782 		if (bdev == sis->bdev) {  in swap_type_of()
1783 			struct swap_extent *se = first_se(sis);  in swap_type_of()
1787 					*bdev_p = bdgrab(sis->bdev);  in swap_type_of()
1828 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1830 		spin_lock(&sis->lock);  in count_swap_pages()
1831 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1832 			n = sis->pages;  in count_swap_pages()
1834 				n -= sis->inuse_pages;  in count_swap_pages()
1836 		spin_unlock(&sis->lock);  in count_swap_pages()
2259 	struct swap_info_struct *sis;  in map_swap_entry()  local
2263 	sis = swp_swap_info(entry);  in map_swap_entry()
2264 	*bdev = sis->bdev;  in map_swap_entry()
2267 	se = offset_to_swap_extent(sis, offset);  in map_swap_entry()
2284 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
2286 	while (!RB_EMPTY_ROOT(&sis->swap_extent_root)) {  in destroy_swap_extents()
2287 		struct rb_node *rb = sis->swap_extent_root.rb_node;  in destroy_swap_extents()
2290 		rb_erase(rb, &sis->swap_extent_root);  in destroy_swap_extents()
2294 	if (sis->flags & SWP_ACTIVATED) {  in destroy_swap_extents()
2295 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
2298 		sis->flags &= ~SWP_ACTIVATED;  in destroy_swap_extents()
2311 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
2314 	struct rb_node **link = &sis->swap_extent_root.rb_node, *parent = NULL;  in add_swap_extent()
2346 	rb_insert_color(&new_se->rb_node, &sis->swap_extent_root);  in add_swap_extent()
2381 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
2383 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
2389 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2390 		*span = sis->pages;  in setup_swap_extents()
2395 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
2397 			sis->flags |= SWP_ACTIVATED;  in setup_swap_extents()
2399 			sis->flags |= SWP_FS;  in setup_swap_extents()
2400 			ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2401 			*span = sis->pages;  in setup_swap_extents()
2406 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()