1 files changed, 69 insertions, 1 deletions

diff --git a/include/linux/trace.h b/include/linux/trace.h
index b95ffb2188ab..7eaad857dee0 100644
--- a/include/linux/trace.h
+++ b/include/linux/trace.h
@@ -2,7 +2,10 @@
 #ifndef _LINUX_TRACE_H
 #define _LINUX_TRACE_H
 
-#ifdef CONFIG_TRACING
+#define TRACE_EXPORT_FUNCTION	BIT(0)
+#define TRACE_EXPORT_EVENT	BIT(1)
+#define TRACE_EXPORT_MARKER	BIT(2)
+
 /*
  * The trace export - an export of Ftrace output. The trace_export
  * can process traces and export them to a registered destination as
@@ -15,15 +18,80 @@
  * next		- pointer to the next trace_export
  * write	- copy traces which have been delt with ->commit() to
  *		  the destination
+ * flags	- which ftrace to be exported
  */
 struct trace_export {
 	struct trace_export __rcu	*next;
 	void (*write)(struct trace_export *, const void *, unsigned int);
+	int flags;
 };
 
+struct trace_array;
+
+#ifdef CONFIG_TRACING
+
 int register_ftrace_export(struct trace_export *export);
 int unregister_ftrace_export(struct trace_export *export);
 
+/**
+ * trace_array_puts - write a constant string into the trace buffer.
+ * @tr:    The trace array to write to
+ * @str:   The constant string to write
+ */
+#define trace_array_puts(tr, str)					\
+	({								\
+		str ? __trace_array_puts(tr, _THIS_IP_, str, strlen(str)) : -1;	\
+	})
+int __trace_array_puts(struct trace_array *tr, unsigned long ip,
+		       const char *str, int size);
+
+void trace_printk_init_buffers(void);
+__printf(3, 4)
+int trace_array_printk(struct trace_array *tr, unsigned long ip,
+		       const char *fmt, ...);
+int trace_array_init_printk(struct trace_array *tr);
+void trace_array_put(struct trace_array *tr);
+struct trace_array *trace_array_get_by_name(const char *name, const char *systems);
+int trace_array_destroy(struct trace_array *tr);
+
+/* For osnoise tracer */
+int osnoise_arch_register(void);
+void osnoise_arch_unregister(void);
+void osnoise_trace_irq_entry(int id);
+void osnoise_trace_irq_exit(int id, const char *desc);
+
+#else /* CONFIG_TRACING */
+static inline int register_ftrace_export(struct trace_export *export)
+{
+	return -EINVAL;
+}
+static inline int unregister_ftrace_export(struct trace_export *export)
+{
+	return 0;
+}
+static inline void trace_printk_init_buffers(void)
+{
+}
+static inline __printf(3, 4)
+int trace_array_printk(struct trace_array *tr, unsigned long ip, const char *fmt, ...)
+{
+	return 0;
+}
+static inline int trace_array_init_printk(struct trace_array *tr)
+{
+	return -EINVAL;
+}
+static inline void trace_array_put(struct trace_array *tr)
+{
+}
+static inline struct trace_array *trace_array_get_by_name(const char *name, const char *systems)
+{
+	return NULL;
+}
+static inline int trace_array_destroy(struct trace_array *tr)
+{
+	return 0;
+}
 #endif	/* CONFIG_TRACING */
 
 #endif	/* _LINUX_TRACE_H */