rmap: pass the folio to __page_check_anon_rmap()

The lone caller already has the folio, so pass it in instead of deriving
it from the page again.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Matthew Wilcox (Oracle)

mm/rmap.c

@@ -1175,14 +1175,14 @@ static void __page_set_anon_rmap(struct folio *folio, struct page *page,
 
 /**
  * __page_check_anon_rmap - sanity check anonymous rmap addition
- * @page:	the page to add the mapping to
+ * @folio:	The folio containing @page.
+ * @page:	the page to check the mapping of
  * @vma:	the vm area in which the mapping is added
  * @address:	the user virtual address mapped
  */
-static void __page_check_anon_rmap(struct page *page,
+static void __page_check_anon_rmap(struct folio *folio, struct page *page,
 	struct vm_area_struct *vma, unsigned long address)
 {
-	struct folio *folio = page_folio(page);
 	/*
 	 * The page's anon-rmap details (mapping and index) are guaranteed to
 	 * be set up correctly at this point.
@@ -1262,7 +1262,7 @@ void page_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
 			__page_set_anon_rmap(folio, page, vma, address,
 					     !!(flags & RMAP_EXCLUSIVE));
 		else
-			__page_check_anon_rmap(page, vma, address);
+			__page_check_anon_rmap(folio, page, vma, address);
 	}
 
 	mlock_vma_folio(folio, vma, compound);