[PATCH 02/17] mm: Add folio_pincount_available()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Convert hpage_pincount_available() into folio_pincount_available() and
turn hpage_pincount_available() into a wrapper.  We don't need to
check folio_test_large() before checking folio_order() as
folio_order() includes a check of folio_test_large().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/mm.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 98a10412d581..269b5484d66e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -927,15 +927,19 @@ static inline void destroy_compound_page(struct page *page)
 	compound_page_dtors[page[1].compound_dtor](page);
 }
 
-static inline bool hpage_pincount_available(struct page *page)
+static inline bool folio_pincount_available(struct folio *folio)
 {
 	/*
-	 * Can the page->hpage_pinned_refcount field be used? That field is in
+	 * Can the folio->hpage_pinned_refcount field be used? That field is in
 	 * the 3rd page of the compound page, so the smallest (2-page) compound
 	 * pages cannot support it.
 	 */
-	page = compound_head(page);
-	return PageCompound(page) && compound_order(page) > 1;
+	return folio_order(folio) > 1;
+}
+
+static inline bool hpage_pincount_available(struct page *page)
+{
+	return folio_pincount_available(page_folio(page));
 }
 
 static inline int head_compound_pincount(struct page *head)
-- 
2.33.0