Instead of calling compound_order() and compound_nr_pages(), use
the folio directly. Saves 1905 bytes from mm/filemap.o due to
folio_test_large() now being a cheaper check than PageHead().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
include/linux/mm.h | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 18e01474cf6b..7ee34dcf1aa3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -697,7 +697,9 @@ static inline unsigned int compound_order(struct page *page)
*/
static inline unsigned int folio_order(struct folio *folio)
{
- return compound_order(&folio->page);
+ if (!folio_test_large(folio))
+ return 0;
+ return folio->_folio_order;
}
#include <linux/huge_mm.h>
@@ -1590,7 +1592,13 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
*/
static inline long folio_nr_pages(struct folio *folio)
{
- return compound_nr(&folio->page);
+ if (!folio_test_large(folio))
+ return 1;
+#ifdef CONFIG_64BIT
+ return folio->_folio_nr_pages;
+#else
+ return 1L << folio->_folio_order;
+#endif
}
/**
--
2.35.1
