diff --git a/include/asm-s390/mmu.h b/include/asm-s390/mmu.h
new file mode 100644
index 0000000..ccd36d2
--- /dev/null
+++ b/include/asm-s390/mmu.h
@@ -0,0 +1,7 @@
+#ifndef __MMU_H
+#define __MMU_H
+
+/* Default "unsigned long" context */
+typedef unsigned long mm_context_t;
+
+#endif