v4.19.13 snapshot.
diff --git a/arch/s390/include/asm/cache.h b/arch/s390/include/asm/cache.h
new file mode 100644
index 0000000..d5e22e8
--- /dev/null
+++ b/arch/s390/include/asm/cache.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * S390 version
+ * Copyright IBM Corp. 1999
+ *
+ * Derived from "include/asm-i386/cache.h"
+ * Copyright (C) 1992, Linus Torvalds
+ */
+
+#ifndef __ARCH_S390_CACHE_H
+#define __ARCH_S390_CACHE_H
+
+#define L1_CACHE_BYTES 256
+#define L1_CACHE_SHIFT 8
+#define NET_SKB_PAD 32
+
+#define __read_mostly __section(.data..read_mostly)
+
+#endif