[PATCH] ftrace: Append wakeup_rt description of ftrace doc

[Geunsik Lim]

From: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>

Append and update the description about wakeup/wakeup_rt usage.

Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
---
 Documentation/trace/ftrace.txt |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index 1ebc24c..03b5205 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -226,6 +226,13 @@ Here is the list of current tracers that may be configured.
 	Traces and records the max latency that it takes for
 	the highest priority task to get scheduled after
 	it has been woken up.
+        Traces all tasks as an average developer would expect.
+
+  "wakeup_rt"
+
+        Traces and records the max latency that it takes for just
+        RT tasks (as the current "wakeup" does). This is useful
+        for those interested in wake up timings of RT tasks.
 
   "hw-branch-tracer"
 
-- 
1.7.8.1

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