On Wed, Jan 05, 2022 at 12:44:38AM -0800, John Hubbard wrote:
> On 1/2/22 13:57, Matthew Wilcox (Oracle) wrote:
> > +int isolate_lru_page(struct page *page)
> > +{
> > + if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
> > + return -EBUSY;
> > + return isolate_lru_folio((struct folio *)page);
>
> This cast is not great to have, but it is correct, given the above
> constraints about tail pages...and I expect this sort of thing is
> temporary, anyway?
We could call page_folio() here, but we already know the answer.
The whole of folio-compat.c is temporary. Any time I have the luxury
of boredom, grepping for any of the functions in folio-compat will
show something that needs to be converted to use folios.
