/* The unique thing about the reader page, is that, if the writer is ever on it, the previous pointer never points back to the reader page.  */
static int rb_is_reader_page(struct buffer_page *page)
/* The unique thing about the reader page, is that, if the writer is ever on it, the previous pointer never points back to the reader page.  */
static int rb_is_reader_page(struct buffer_page *page)
{
	struct list_head *list = page->list.prev;
	return rb_list_head(list->next) != &page->list;
}