entry.val = page->private;
entry.val = page_private(page);
void delete_from_swap_cache(struct page *page){	swp_entry_t entry;	entry.val = page->private;	write_lock_irq(&swapper_space.tree_lock);	__delete_from_swap_cache(page);	write_unlock_irq(&swapper_space.tree_lock);	swap_free(entry);	page_cache_release(page);}