Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
new file mode 100644
index 000000000..43d9525c3
--- /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)
+{
+}