v4.19.13 snapshot.
diff --git a/arch/openrisc/kernel/vmlinux.h b/arch/openrisc/kernel/vmlinux.h
new file mode 100644
index 0000000..bdea46c
--- /dev/null
+++ b/arch/openrisc/kernel/vmlinux.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __OPENRISC_VMLINUX_H_
+#define __OPENRISC_VMLINUX_H_
+
+#ifdef CONFIG_BLK_DEV_INITRD
+extern char __initrd_start, __initrd_end;
+#endif
+
+#endif