From ec1dbc10ad1f5f30ddd299e9cbf906285020a2c5 Mon Sep 17 00:00:00 2001
From: Minchan Kim <minchan@kernel.org>
Date: Tue, 23 Mar 2021 10:07:38 -0700
Subject: [PATCH] ANDROID: mm: page_pinner: use put_user_page at
 add_page_for_migration

add_page_for_migration uses follow_page with FOLL_GET. Thus,
close the page_pinner false positive by using put_user_page.

Bug: 183414571
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: I655b5610bafad86172dcb291573c33176989d94b
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 4f76dcb51119..1f796957852e 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1654,7 +1654,7 @@ out_putpage:
 	 * isolate_lru_page() or drop the page ref if it was
 	 * not isolated.
 	 */
-	put_page(page);
+	put_user_page(page);
 out:
 	mmap_read_unlock(mm);
 	return err;