[PATCH 10/11] ftrace: add doc for new option record-funcproto

[Changbin Du]

Just add the doc for our new feature.

Signed-off-by: Changbin Du <changbin.du@xxxxxxxxx>
---
 Documentation/trace/ftrace.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
index f60079259669..c68fbbedb8bd 100644
--- a/Documentation/trace/ftrace.rst
+++ b/Documentation/trace/ftrace.rst
@@ -988,6 +988,7 @@ To see what is available, simply cat the file::
 	nolatency-format
 	record-cmd
 	norecord-tgid
+	norecord-funcproto
 	overwrite
 	nodisable_on_free
 	irq-info
@@ -1131,6 +1132,11 @@ Here are the available options:
 	mapped Thread Group IDs (TGID) mapping to pids. See
 	"saved_tgids".
 
+  record-funcproto
+	Record function parameters and return value. This option
+	is only supported by function_graph tracer on x86_64
+	platform by now.
+
   overwrite
 	This controls what happens when the trace buffer is
 	full. If "1" (default), the oldest events are
-- 
2.20.1