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-rw-r--r--kernel/trace/trace.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 88bd9ae2a9e..f531301b7a3 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1151,6 +1151,22 @@ void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
__ftrace_trace_stack(tr->buffer, flags, skip, pc);
}
+/**
+ * trace_dump_stack - record a stack back trace in the trace buffer
+ */
+void trace_dump_stack(void)
+{
+ unsigned long flags;
+
+ if (tracing_disabled || tracing_selftest_running)
+ return 0;
+
+ local_save_flags(flags);
+
+ /* skipping 3 traces, seems to get us at the caller of this function */
+ __ftrace_trace_stack(global_trace.buffer, flags, 3, preempt_count());
+}
+
void
ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
{