[PATCHv8 5/6] io_uring: enable per-io hinting capability

[Christoph Hellwig]

Same hint vs write stream thing here as well.

> +	if (ddir == ITER_SOURCE &&
> +	    req->file->f_op->fop_flags & FOP_PER_IO_HINTS)
> +		rw->kiocb.ki_write_hint = READ_ONCE(sqe->write_hint);
> +	else
> +		rw->kiocb.ki_write_hint = WRITE_LIFE_NOT_SET;

WRITE_LIFE_NOT_SET is in the wrong namespae vs the separate streams.

Either use 0 directly or add a separate constant for it.