From f14ace6fc654ba1b4ece36a7e9732552963650b7 Mon Sep 17 00:00:00 2001
From: Tao Huang <huangtao@rock-chips.com>
Date: Wed, 21 Sep 2022 17:34:50 +0800
Subject: [PATCH] dax: support ARM

ARM missing define copy_user_page.

Signed-off-by: Tao Huang <huangtao@rock-chips.com>
Change-Id: Ib2ae611a9605e153e72f4c94936ab6ebcae3510e
---
 fs/dax.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/dax.c b/fs/dax.c
index d5d7b9393bca..61e73b6a2314 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -728,6 +728,11 @@ static int copy_cow_page_dax(struct block_device *bdev, struct dax_device *dax_d
 		return rc;
 	}
 	vto = kmap_atomic(to);
+#ifdef CONFIG_ARM
+#ifndef copy_user_page
+#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
+#endif
+#endif
 	copy_user_page(vto, (void __force *)kaddr, vaddr, to);
 	kunmap_atomic(vto);
 	dax_read_unlock(id);