[PATCH v3 03/10] mprotect: Use pfn_swap_entry_folio

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

We only want to know whether the folio is anonymous, so use
pfn_swap_entry_folio() and save a call to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/mprotect.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 81991102f785..f8a4544b4601 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -198,13 +198,13 @@ static long change_pte_range(struct mmu_gather *tlb,
 			pte_t newpte;
 
 			if (is_writable_migration_entry(entry)) {
-				struct page *page = pfn_swap_entry_to_page(entry);
+				struct folio *folio = pfn_swap_entry_folio(entry);
 
 				/*
 				 * A protection check is difficult so
 				 * just be safe and disable write
 				 */
-				if (PageAnon(page))
+				if (folio_test_anon(folio))
 					entry = make_readable_exclusive_migration_entry(
 							     swp_offset(entry));
 				else
-- 
2.43.0