Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 27 insertions, 0 deletions

diff --git a/arch/xtensa/oprofile/backtrace.c b/arch/xtensa/oprofile/backtrace.c
new file mode 100644
index 000000000..8f952034e
--- /dev/null
+++ b/arch/xtensa/oprofile/backtrace.c
@@ -0,0 +1,27 @@
+/**
+ * @file backtrace.c
+ *
+ * @remark Copyright 2008 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ * @remark Read the file COPYING
+ *
+ */
+
+#include <linux/oprofile.h>
+#include <asm/ptrace.h>
+#include <asm/stacktrace.h>
+
+static int xtensa_backtrace_cb(struct stackframe *frame, void *data)
+{
+	oprofile_add_trace(frame->pc);
+	return 0;
+}
+
+void xtensa_backtrace(struct pt_regs * const regs, unsigned int depth)
+{
+	if (user_mode(regs))
+		xtensa_backtrace_user(regs, depth, xtensa_backtrace_cb, NULL);
+	else
+		xtensa_backtrace_kernel(regs, depth, xtensa_backtrace_cb,
+					xtensa_backtrace_cb, NULL);
+}