Re: [PATCH v4 15/25] mm/filemap: Convert lock_page_async to lock_folio_async

[Christoph Hellwig]

On Fri, Mar 05, 2021 at 04:18:51AM +0000, Matthew Wilcox (Oracle) wrote:
> There aren't any actual callers of lock_page_async(), but convert
> filemap_update_page() to call __lock_folio_async().

So please just kill lock_page_async first and mark __lock_page_async
static.  Then only update __lock_page_async to work on a folio.