mm: vmscan: use TestClearPageLRU() on isolate_page()

We have TestClearPageLRU() backported, use it to reduce divergence
with mglru patches.

Signed-off-by: Juhyung Park <qkrwngud825@gmail.com>
Change-Id: I5c06f6bf6e1d637d309abbcb97e02c786010d002
Signed-off-by: fadlyas07 <mhmmdfdlyas@gmail.com>
Signed-off-by: HeroBuxx <me@herobuxx.me>

Author: arter97

mm/vmscan.c

@@ -4168,7 +4168,10 @@ static bool isolate_page(struct lruvec *lruvec, struct page *page, struct scan_c
 	if (!get_page_unless_zero(page))
 		return false;
 
-	ClearPageLRU(page);
+	if (!TestClearPageLRU(page)) {
+		put_page(page);
+		return false;
+	}
 
 	success = lru_gen_del_page(lruvec, page, true);
 	VM_BUG_ON_PAGE(!success, page);