159 static inline struct swap_extent *first_se(struct swap_info_struct *sis)  in first_se()  argument
161 	struct rb_node *rb = rb_first(&sis->swap_extent_root);  in first_se()
209 offset_to_swap_extent(struct swap_info_struct *sis, unsigned long offset)  in offset_to_swap_extent()  argument
214 	rb = sis->swap_extent_root.rb_node;  in offset_to_swap_extent()
230 	struct swap_info_struct *sis = page_swap_info(page);  in swap_page_sector()  local
236 	se = offset_to_swap_extent(sis, offset);  in swap_page_sector()
1672 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1674 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1677 		if (device == sis->bdev->bd_dev) {  in swap_type_of()
1678 			struct swap_extent *se = first_se(sis);  in swap_type_of()
1696 		struct swap_info_struct *sis = swap_info[type];  in find_first_swap()  local
1698 		if (!(sis->flags & SWP_WRITEOK))  in find_first_swap()
1700 		*device = sis->bdev->bd_dev;  in find_first_swap()
1735 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1737 		spin_lock(&sis->lock);  in count_swap_pages()
1738 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1739 			n = sis->pages;  in count_swap_pages()
1741 				n -= sis->inuse_pages;  in count_swap_pages()
1743 		spin_unlock(&sis->lock);  in count_swap_pages()
2152 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
2154 	while (!RB_EMPTY_ROOT(&sis->swap_extent_root)) {  in destroy_swap_extents()
2155 		struct rb_node *rb = sis->swap_extent_root.rb_node;  in destroy_swap_extents()
2158 		rb_erase(rb, &sis->swap_extent_root);  in destroy_swap_extents()
2162 	if (sis->flags & SWP_ACTIVATED) {  in destroy_swap_extents()
2163 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
2166 		sis->flags &= ~SWP_ACTIVATED;  in destroy_swap_extents()
2179 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
2182 	struct rb_node **link = &sis->swap_extent_root.rb_node, *parent = NULL;  in add_swap_extent()
2214 	rb_insert_color(&new_se->rb_node, &sis->swap_extent_root);  in add_swap_extent()
2246 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
2248 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
2254 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2255 		*span = sis->pages;  in setup_swap_extents()
2260 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
2263 		sis->flags |= SWP_ACTIVATED;  in setup_swap_extents()
2264 		if ((sis->flags & SWP_FS_OPS) &&  in setup_swap_extents()
2266 			destroy_swap_extents(sis);  in setup_swap_extents()
2272 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()