On Mon, Mar 05, 2018 at 03:57:07PM +0000, Bart Van Assche wrote:

On Sat, 2018-03-03 at 10:24 +0800, Ming Lei wrote:

quoted

 struct nullb_page {
 	struct page *page;
-	unsigned long bitmap;
+	unsigned long bitmap[DIV_ROUND_UP(MAP_SZ, sizeof(unsigned long) * 8)];
 };

Could DECLARE_BITMAP() have been used here?

Indeed, will do it in V2.

Thanks,
Ming