Re: [PATCH v4 1/3] dax: Add an enum for specifying dax wakup mode

[Matthew Wilcox]

On Fri, Apr 23, 2021 at 09:07:21AM -0400, Vivek Goyal wrote:
> +enum dax_wake_mode {
> +	WAKE_NEXT,
> +	WAKE_ALL,
> +};

Why define them in this order when ...

> @@ -196,7 +207,7 @@ static void dax_wake_entry(struct xa_state *xas, void *entry, bool wake_all)
>  	 * must be in the waitqueue and the following check will see them.
>  	 */
>  	if (waitqueue_active(wq))
> -		__wake_up(wq, TASK_NORMAL, wake_all ? 0 : 1, &key);
> +		__wake_up(wq, TASK_NORMAL, mode == WAKE_ALL ? 0 : 1, &key);

... they're used like this?  This is almost as bad as

enum bool {
	true,
	false,
};