v4.19.13 snapshot.
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
new file mode 100644
index 0000000..43d9525
--- /dev/null
+++ b/arch/s390/oprofile/init.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * S390 Version
+ * Copyright IBM Corp. 2002, 2011
+ * Author(s): Thomas Spatzier (tspat@de.ibm.com)
+ * Author(s): Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com)
+ * Author(s): Heinz Graalfs (graalfs@linux.vnet.ibm.com)
+ * Author(s): Andreas Krebbel (krebbel@linux.vnet.ibm.com)
+ *
+ * @remark Copyright 2002-2011 OProfile authors
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <asm/processor.h>
+
+static int __s390_backtrace(void *data, unsigned long address, int reliable)
+{
+ unsigned int *depth = data;
+
+ if (*depth == 0)
+ return 1;
+ (*depth)--;
+ oprofile_add_trace(address);
+ return 0;
+}
+
+static void s390_backtrace(struct pt_regs *regs, unsigned int depth)
+{
+ if (user_mode(regs))
+ return;
+ dump_trace(__s390_backtrace, &depth, NULL, regs->gprs[15]);
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+ ops->backtrace = s390_backtrace;
+ return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+}