1 files changed, 37 insertions, 0 deletions
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
new file mode 100644
index 000000000..7441857df
--- /dev/null
+++ b/arch/s390/oprofile/init.c
@@ -0,0 +1,37 @@
+// 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>
+#include <asm/unwind.h>
+
+static void s390_backtrace(struct pt_regs *regs, unsigned int depth)
+{
+	struct unwind_state state;
+
+	unwind_for_each_frame(&state, current, regs, 0) {
+		if (depth-- == 0)
+			break;
+		oprofile_add_trace(state.ip);
+	}
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	ops->backtrace = s390_backtrace;
+	return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+}