v4.19.13 snapshot.
diff --git a/net/9p/trans_common.c b/net/9p/trans_common.c
new file mode 100644
index 0000000..b718db2
--- /dev/null
+++ b/net/9p/trans_common.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/module.h>
+
+/**
+ * p9_release_pages - Release pages after the transaction.
+ */
+void p9_release_pages(struct page **pages, int nr_pages)
+{
+ int i;
+
+ for (i = 0; i < nr_pages; i++)
+ if (pages[i])
+ put_page(pages[i]);
+}
+EXPORT_SYMBOL(p9_release_pages);