This prepares for upcoming checks in page freeing path.

Signed-off-by: Zi Yan <ziy@nvidia.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@gentwo.org>
Cc: linux-mm@kvack.org
---
 mm/percpu-vm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/percpu-vm.c b/mm/percpu-vm.c
index 4f5937090590..edc8f4448a8e 100644
--- a/mm/percpu-vm.c
+++ b/mm/percpu-vm.c
@@ -61,8 +61,10 @@ static void pcpu_free_pages(struct pcpu_chunk *chunk,
 		for (i = page_start; i < page_end; i++) {
 			struct page *page = pages[pcpu_page_idx(cpu, i)];
 
-			if (page)
+			if (page) {
+				set_page_private(page, 0);
 				__free_page(page);
+			}
 		}
 	}
 }
-- 
2.51.0