1 files changed, 13 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c
index bab284d69c8c..37f7b6711514 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -783,3 +783,16 @@ out_mm:
 out:
 	return res;
 }
+
+int memcmp_pages(struct page *page1, struct page *page2)
+{
+	char *addr1, *addr2;
+	int ret;
+
+	addr1 = kmap_atomic(page1);
+	addr2 = kmap_atomic(page2);
+	ret = memcmp(addr1, addr2, PAGE_SIZE);
+	kunmap_atomic(addr2);
+	kunmap_atomic(addr1);
+	return ret;
+}