diff --git a/mm/memory.c b/mm/memory.c
index 6768ce9..e9c5504 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -59,6 +59,7 @@
 #include <linux/gfp.h>
 #include <linux/migrate.h>
 #include <linux/string.h>
+#include <linux/dma-debug.h>
 
 #include <asm/io.h>
 #include <asm/pgalloc.h>
@@ -2559,6 +2560,8 @@
 
 static inline void cow_user_page(struct page *dst, struct page *src, unsigned long va, struct vm_area_struct *vma)
 {
+	debug_dma_assert_idle(src);
+
 	/*
 	 * If the source page was a PFN mapping, we don't have
 	 * a "struct page" for it. We do a best-effort copy by