Re: [PATCH v14 088/138] mm/filemap: Add filemap_get_folio

Matthew Wilcox
2021-08-16T03:03:30Z

On Tue, Aug 10, 2021 at 11:05:33PM +0100, David Howells wrote:
> Matthew Wilcox (Oracle) <willy@infradead.org> wrote:
>
> > filemap_get_folio() is a replacement for find_get_page().
> > Turn pagecache_get_page() into a wrapper around __filemap_get_folio().
> > Remove find_lock_head() as this use case is now covered by
> > filemap_get_folio().
> >
> > Reduces overall kernel size by 209 bytes. __filemap_get_folio() is
> > 316 bytes shorter than pagecache_get_page() was, but the new
> > pagecache_get_page() is 99 bytes
>
> longer, one presumes.

In total -- the old pagecache_get_page() turns into
__filemap_get_folio(), but the wrapper is 99 bytes in size.

Added the word "wrapper" to make this clearer.