161 static inline struct swap_extent *first_se(struct swap_info_struct *sis)  in first_se()  argument
163 	struct rb_node *rb = rb_first(&sis->swap_extent_root);  in first_se()
211 offset_to_swap_extent(struct swap_info_struct *sis, unsigned long offset)  in offset_to_swap_extent()  argument
216 	rb = sis->swap_extent_root.rb_node;  in offset_to_swap_extent()
232 	struct swap_info_struct *sis = page_swap_info(page);  in swap_page_sector()  local
238 	se = offset_to_swap_extent(sis, offset);  in swap_page_sector()
1653 		struct swap_info_struct *sis = swap_info[type];  in swap_type_of()  local
1655 		if (!(sis->flags & SWP_WRITEOK))  in swap_type_of()
1658 		if (device == sis->bdev->bd_dev) {  in swap_type_of()
1659 			struct swap_extent *se = first_se(sis);  in swap_type_of()
1677 		struct swap_info_struct *sis = swap_info[type];  in find_first_swap()  local
1679 		if (!(sis->flags & SWP_WRITEOK))  in find_first_swap()
1681 		*device = sis->bdev->bd_dev;  in find_first_swap()
1716 		struct swap_info_struct *sis = swap_info[type];  in count_swap_pages()  local
1718 		spin_lock(&sis->lock);  in count_swap_pages()
1719 		if (sis->flags & SWP_WRITEOK) {  in count_swap_pages()
1720 			n = sis->pages;  in count_swap_pages()
1722 				n -= sis->inuse_pages;  in count_swap_pages()
1724 		spin_unlock(&sis->lock);  in count_swap_pages()
2157 static void destroy_swap_extents(struct swap_info_struct *sis)  in destroy_swap_extents()  argument
2159 	while (!RB_EMPTY_ROOT(&sis->swap_extent_root)) {  in destroy_swap_extents()
2160 		struct rb_node *rb = sis->swap_extent_root.rb_node;  in destroy_swap_extents()
2163 		rb_erase(rb, &sis->swap_extent_root);  in destroy_swap_extents()
2167 	if (sis->flags & SWP_ACTIVATED) {  in destroy_swap_extents()
2168 		struct file *swap_file = sis->swap_file;  in destroy_swap_extents()
2171 		sis->flags &= ~SWP_ACTIVATED;  in destroy_swap_extents()
2184 add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,  in add_swap_extent()  argument
2187 	struct rb_node **link = &sis->swap_extent_root.rb_node, *parent = NULL;  in add_swap_extent()
2219 	rb_insert_color(&new_se->rb_node, &sis->swap_extent_root);  in add_swap_extent()
2251 static int setup_swap_extents(struct swap_info_struct *sis, sector_t *span)  in setup_swap_extents()  argument
2253 	struct file *swap_file = sis->swap_file;  in setup_swap_extents()
2259 		ret = add_swap_extent(sis, 0, sis->max, 0);  in setup_swap_extents()
2260 		*span = sis->pages;  in setup_swap_extents()
2265 		ret = mapping->a_ops->swap_activate(sis, swap_file, span);  in setup_swap_extents()
2268 		sis->flags |= SWP_ACTIVATED;  in setup_swap_extents()
2269 		if ((sis->flags & SWP_FS_OPS) &&  in setup_swap_extents()
2271 			destroy_swap_extents(sis);  in setup_swap_extents()
2277 	return generic_swapfile_activate(sis, swap_file, span);  in setup_swap_extents()