> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 8ae31622deef..d48a1f0889d1 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1218,7 +1218,7 @@ __maybe_unused struct page *try_grab_compound_head(struct page *page, int refs,
> static inline __must_check bool try_get_page(struct page *page)
> {
> page = compound_head(page);
> - if (WARN_ON_ONCE(page_ref_count(page) <= 0))
> + if (WARN_ON_ONCE(page_ref_count(page) < (int)!is_zone_device_page(page)))
Please avoid the overly long line. In fact I'd be tempted to just not
bother here and keep the old, more lose check. Especially given that
John has a patch ready that removes try_get_page entirely.
