[PATCH] Documentation/rtla: Describe exit status

[Costa Shulyupin]

Commit 18682166f61494072d58 ("rtla: Set distinctive exit value for failed
tests") expands exit status making it useful.

Add section 'EXIT STATUS' and required SPDX-License-Identifier
to the documentation.

Signed-off-by: Costa Shulyupin <costa.shul@xxxxxxxxxx>
---
 Documentation/tools/rtla/common_appendix.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/tools/rtla/common_appendix.rst b/Documentation/tools/rtla/common_appendix.rst
index b5cf2dc223df..a6233ca8e6d6 100644
--- a/Documentation/tools/rtla/common_appendix.rst
+++ b/Documentation/tools/rtla/common_appendix.rst
@@ -1,3 +1,13 @@
+.. SPDX-License-Identifier: GPL-2.0
+EXIT STATUS
+===========
+
+::
+
+ 0  Passed: the test did not hit the stop tracing condition
+ 1  Error: invalid argument
+ 2  Failed: the test hit the stop tracing condition
+
 REPORTING BUGS
 ==============
 Report bugs to <linux-kernel@xxxxxxxxxxxxxxx>
-- 
2.48.1