1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 74f1fe5788d4..69c1ecfb2290 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -673,6 +673,21 @@ struct dentry *trace_create_file(const char *name,
 				 void *data,
 				 const struct file_operations *fops);
 
+
+/**
+ * tracer_tracing_is_on_cpu - show real state of ring buffer enabled on for a cpu
+ * @tr : the trace array to know if ring buffer is enabled
+ * @cpu: The cpu buffer to check if enabled
+ *
+ * Shows real state of the per CPU buffer if it is enabled or not.
+ */
+static inline bool tracer_tracing_is_on_cpu(struct trace_array *tr, int cpu)
+{
+	if (tr->array_buffer.buffer)
+		return ring_buffer_record_is_on_cpu(tr->array_buffer.buffer, cpu);
+	return false;
+}
+
 int tracing_init_dentry(void);
 
 struct ring_buffer_event;