[PATCH v3 2/5] mm: memory: use a folio in validate_page_before_insert()

[Kefeng Wang]

Use a folio in validate_page_before_insert() to save two
compound_head() calls.

Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
 mm/memory.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 4de9fa7d7073..dffd39c9b3af 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1839,9 +1839,12 @@ pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
 
 static int validate_page_before_insert(struct page *page)
 {
-	if (PageAnon(page) || PageSlab(page) || page_has_type(page))
+	struct folio *folio = page_folio(page);
+
+	if (folio_test_anon(folio) || folio_test_slab(folio) ||
+	    page_has_type(page))
 		return -EINVAL;
-	flush_dcache_page(page);
+	flush_dcache_folio(folio);
 	return 0;
 }
 
-- 
2.27.0