Re: [PATCH v4 2/3] fs: Convert kiocb rw_hint from enum to u16

[Christoph Hellwig]

> +/* ki_hint changed from enum to u16, make sure rw_hint fits into u16 */

I don't think this comment is very useful.

> +static inline u16 ki_hint_valid(enum rw_hint hint)

I'd call this ki_hint_validate.

> +{
> +	if (hint > MAX_KI_HINT)
> +		return 0;
> +
> +	return hint;

Nit: kill the empty line.