Re: [PATCH 01/12] writeback: Factor out writeback_finish()

[Christoph Hellwig]

On Mon, Jun 26, 2023 at 06:35:10PM +0100, Matthew Wilcox (Oracle) wrote:
> +	struct folio_batch fbatch;
> +	pgoff_t done_index;
> +	int err;
> +

I think this really needs a comment that it should only be used for
the writeback iterator.  In fact this whole structure could use a lot
more comments on what should / can be set by the caller, and what is
internal.

> +	unsigned range_whole:1;		/* entire file */

Same here.