mm/swap: Add folio_mark_accessed()

Convert mark_page_accessed() to folio_mark_accessed().  It already
operated on the entire compound page, but now we can avoid calling
compound_head quite so many times.  Shrinks the function from 424 bytes
to 295 bytes (shrinking by 129 bytes).  The compatibility wrapper is 30
bytes, plus the 8 bytes for the exported symbol means the kernel shrinks
by 91 bytes.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>

1 files changed, 7 insertions, 0 deletions

diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 7044fcc8a8aa..a374747ae1c6 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/pagemap.h>
+#include <linux/swap.h>
 
 struct address_space *page_mapping(struct page *page)
 {
@@ -41,3 +42,9 @@ bool page_mapped(struct page *page)
 	return folio_mapped(page_folio(page));
 }
 EXPORT_SYMBOL(page_mapped);
+
+void mark_page_accessed(struct page *page)
+{
+	folio_mark_accessed(page_folio(page));
+}
+EXPORT_SYMBOL(mark_page_accessed);