> +/*
> + * Write life time hint values.
> + */
> +enum rw_hint {
> + WRITE_LIFE_NONE = 0,
> + WRITE_LIFE_SHORT,
> + WRITE_LIFE_MEDIUM,
> + WRITE_LIFE_LONG,
> + WRITE_LIFE_EXTREME,
> +};
> +
> +#define RW_HINT_MASK 0x7 /* 3 bits */FYI, exposing enums in a uapi is always a bit problematic, due to different ABI rules. It might be better to make these explicit defines at least for the uapi. Btw, I think it might make sense to merge this with patch 5.
