tracing: update documentation of snapshot utility

Now, "snapshot" file returns success on a reset of snapshot buffer
even if the buffer wasn't allocated, instead of returning EINVAL.
This patch updates snapshot desctiption according to the change.

Link: http://lkml.kernel.org/r/51399409.4090207@hitachi.com
Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index 53d6a3c51d875771fc2966c9917aec13b17f53c6..a372304aef10a378bc00440053c0fe4028eac566 100644 (file)
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -1873,7 +1873,7 @@ feature:
 
        status\input  |     0      |     1      |    else    |
        --------------+------------+------------+------------+
-       not allocated |(do nothing)| alloc+swap |   EINVAL   |
+       not allocated |(do nothing)| alloc+swap |(do nothing)|
        --------------+------------+------------+------------+
        allocated     |    free    |    swap    |   clear    |
        --------------+------------+------------+------------+